Power unit separation mechanism

Abstract

The application discloses a power device separation mechanism. The disclosed separation mechanism comprises a rear guide sleeve A, a rear guide sleeve B, a mandrel, a spring A, a front guide sleeve A, a front guide sleeve B, a split nut, a spring B and a base. The rear guide sleeve A, the rear guide sleeve B, the mandrel and the spring A are assembled and fixed on the power device, and the front guide sleeve A, the front guide sleeve B, the split nut, the spring B and the base are assembled and fixed on the driven object. The two parts are assembled together through the mandrel, the split nut and the front guide sleeve A, and the reliable connection between the power device and the driven object is realized through the split nut under the action of the pre-compressed spring A. The application realizes the self-locking and separation of the driven object such as a missile or an aircraft and the power device by using a pure mechanical structure. The self-locking and separation can be completed by only relying on the spring force of the separation mechanism and the power of the power device without using any external force, and the structure is simple and has high reliability.

Description

Technical Field

[0001] This invention relates to drive assistance devices, specifically to a power unit separation mechanism that enables the connection and separation of a power unit from the object being separated. It is particularly suitable for connecting and separating a power unit from a missile or aircraft. Background Technology

[0002] Existing small missiles, whether air-to-ground missiles using drones as platforms or ground-to-ground missiles using personnel and armored vehicles as platforms, utilize solid rocket motors as launch propulsion devices. These motors offer advantages such as simple structure, high reliability, ease of use and maintenance, easy achievement of high thrust, and long-term storage, making them crucial in the field of power systems. After the propulsion device has finished operating, it should be promptly separated to maximize the missile's payload. Therefore, reliable connection and separation between the two components must be considered.

[0003] Traditional separation mechanisms often use explosive bolts, which pose safety hazards due to the use of pyrotechnics, require an ignition signal, necessitate sufficient space, and have a complex structure. Therefore, a new type of power system separation mechanism is needed. Summary of the Invention

[0004] In view of the defects or deficiencies of the prior art, the present invention provides a power unit separation mechanism.

[0005] Therefore, the provided power unit separation mechanism includes:

[0006] Rear guide sleeve A, the main body of which is a cylindrical structure and open at one end in the axial direction;

[0007] The rear guide sleeve B has a cylindrical structure, with one end open in the axial direction and a bottom surface B at the other end, on which a through hole B is provided.

[0008] The mandrel has an axial mounting structure at one end of its main body and a small diameter section at the other end, with an end face formed between the small diameter section and the rest of the mandrel.

[0009] Spring A;

[0010] The front guide sleeve A has a cylindrical structure as its main body, with one end being an open structure and the other end having a bottom surface A. The bottom surface A has a through hole A, and the axial middle section of the inner wall of the through hole A is a conical structure A, with the large diameter end of the conical structure A facing the inside of the front guide sleeve A.

[0011] The front guide sleeve B has a cylindrical structure as its main body, with one end open in the axial direction, and the outer wall of the open end is a conical structure B; and the conical structure B is adapted to the conical structure A.

[0012] The split nut is divided into multiple independent blocks, and each block is assembled into a whole nut around the nut's circumference. The outer wall of one end of the whole nut is a conical structure C, and the inner wall of the other end is a conical structure D.

[0013] Spring B;

[0014] Base;

[0015] When using,

[0016] One axial end of the rear guide sleeve A, the mounting structure end of the spindle, and one axial end of the spring A are fixedly installed on the drive end of the power device. Meanwhile, the spindle is located inside the rear guide sleeve A, and the spring A is located between the spindle and the rear guide sleeve A, and the three are coaxial.

[0017] The rear guide sleeve B is movably fitted outside the rear guide sleeve A through its open end. The other axial end of the spring A is fixed on the bottom surface B inside the rear guide sleeve B, and the mandrel passes through the through hole B, while the end face on the mandrel extends out of the through hole B. Under the action of the tension of the spring A, there is an axial distance L2 between the end of the rear guide sleeve A away from the power device and the bottom surface inside the rear guide sleeve B.

[0018] The base is fixedly installed on the open end of the front guide sleeve A, the spring B is installed inside the front guide sleeve A, and the two ends of the spring B are respectively connected to the base and the end of the front guide sleeve B; the front guide sleeve A is fixedly installed on the driven object.

[0019] The front guide sleeve A is assembled onto the mandrel through the through hole A, and the end face of the mandrel is located inside the through hole A. At the same time, the small diameter section of the mandrel passes through the through hole A and is located inside the front guide sleeve A. Meanwhile, the front guide sleeve B is fitted onto the small diameter section of the mandrel through an end opening with a tapered structure.

[0020] The split nut is assembled on the spindle, and under the tension of spring A, the split nut is located in the through hole A. At the same time, the conical structure C on the split nut is adapted to the conical structure A in the through hole A. The outer wall of the remaining structure of the split nut is adapted to the inner wall of the large diameter section in the through hole A. One axial end of the split nut is in contact with the end face on the spindle, and the other end extends out of the through hole A. Meanwhile, the conical structure B at the end of the front guide sleeve B is inserted into the split nut and the conical structure B is adapted to the conical structure D. There is an axial distance L1 between the bottom surface of the end of the front guide sleeve B away from the drive device and the end of the small diameter section of the spindle, where L1 > L2.

[0021] Furthermore, a cavity is formed between the outer wall of the front guide sleeve B and the inner wall of the front guide sleeve A;

[0022] Under the driving force of the power unit, the rear guide sleeve A and the mandrel move in the pushing direction, the spring A is compressed, and the nut is pushed into the cavity through the end face on the mandrel, so that each block structure enters the cavity; then the mandrel moves further in the direction of the thrust to push against the front guide sleeve B, the mandrel continues to move, and the spring B is compressed; after the power unit stops working, under the tension of the spring A, the rear guide sleeve A, the rear guide sleeve B, the spring A and the mandrel move in the opposite direction to separate the mandrel from the front guide sleeve A, thereby realizing the separation of the power unit from the driven object. At the same time, under the elastic force of the spring B, the front guide sleeve B also moves in the opposite direction until the conical structure B matches the conical structure A, thereby sealing the split nut in the cavity.

[0023] Alternatively, the base may have a groove for mounting spring B.

[0024] An alternative solution is that the outer wall of the bottom surface of the other end of the front guide sleeve B is provided with a cavity for mounting the spring B.

[0025] An alternative solution is that the inner wall of the main body of the front guide sleeve A and / or the outer wall of the main body of the front guide sleeve B are provided with a ring of raised structure A;

[0026] In use, the outer wall of the front guide sleeve B, the inner wall of the front guide sleeve A, the protruding structure A, and the bottom surface of the front guide sleeve A with through hole A form a cavity.

[0027] An alternative is that the split nut is evenly divided into three independent blocks.

[0028] An alternative is that the split nut and the mandrel are connected by a thread.

[0029] An optional solution is that the split nut, mandrel, rear guide sleeve A, rear guide sleeve B, front guide sleeve A and front guide sleeve B are made of aluminum alloy; and springs A and B are made of steel.

[0030] In this invention, the rear guide sleeve A, rear guide sleeve B, mandrel, and spring A are assembled and fixed to the power unit. The front guide sleeve A, front guide sleeve B, split nut, spring B, and base are assembled and fixed to the driven object. The two parts are assembled together by the mandrel, split nut, and front guide sleeve A. Under the action of the pre-compression spring A6, the power unit and the driven object are reliably connected by the split nut. This invention uses a purely mechanical structure to achieve self-locking and separation between the driven object, such as a missile or aircraft, and the power unit. It can complete self-locking and separation without using any external force, relying only on the spring force of the separation mechanism and the power of the power unit. The structure is simple and has high reliability.

[0031] This invention employs a purely mechanical structure to achieve self-locking and separation between the driven object (such as a missile or aircraft) and the power unit. It can complete self-locking and separation without utilizing any external force, relying solely on the spring force of the separation mechanism and the power of the power unit. The structure is simple and highly reliable. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the power unit separation structure according to an embodiment of the present invention. The dimensions of each part marked in the figure are in mm.

[0033] Figure 2 This is a schematic diagram of the structure of the front guide sleeve A in an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of the front guide sleeve B in an embodiment of the present invention. Detailed Implementation

[0035] Unless otherwise specified, the science and technology described herein are based on the understanding of those skilled in the art.

[0036] The axial direction, center, and other directional or orientational terms used herein are consistent with the corresponding directions or orientations in the accompanying drawings. It should be noted that the specific directions or orientations in the accompanying drawings are intended to explain the present invention, and any rotations, substitutions, or other equivalent transformations made by those skilled in the art within the scope of the present invention are all within the protection scope of the present invention. The following are preferred examples of the present invention.

[0037] See Figure 1 As shown, the power unit separation mechanism of this embodiment includes: a rear guide sleeve A9, a rear guide sleeve B8, a spindle 7, a spring A6, a front guide sleeve A1, a front guide sleeve B4, a split nut 5, a spring B3, and a base 2; wherein,

[0038] The rear guide sleeve A9 has a cylindrical structure and is open at both ends axially;

[0039] The rear guide sleeve B8 has a cylindrical structure with one end open in the axial direction and a bottom surface B at the other end, on which a through hole B is provided.

[0040] The spindle 7 has an mounting structure at one end of its main body and a small diameter section at the other end, which forms an end face with the rest of the spindle. The maximum diameter of the spindle 7 in this embodiment is determined according to the selected spring model. In this example, the diameter is 9mm. The diameter of the small diameter section is determined according to the thread strength of the three-lobed nut. In this example, it is an M6×0.75 fine thread.

[0041] See Figure 2As shown, the main body of the front guide sleeve A1 is a cylindrical structure, with one end being an open structure in the axial direction and the other end having a bottom surface A. A through hole A12 is provided on the bottom surface A. The axial middle section of the inner wall of the through hole A is a conical structure A, and the large diameter end of the conical structure A faces the inside of the front guide sleeve A.

[0042] See Figure 3 As shown, the main body of the front guide sleeve B4 is a cylindrical structure, with an open end 42 on one side in the axial direction. The outer wall of the open end is a conical structure B42. The other end is provided with a bottom surface 43 (in this embodiment, the bottom surface 43 is provided with a through hole to ensure safety during operation and prevent the mandrel from being obstructed). The outer wall of the bottom surface is provided with a cavity 44 for mounting the spring B. The conical structure B is adapted to the conical structure A.

[0043] Furthermore, a raised structure A45 is provided on the inner wall of the main body of the front guide sleeve A1 and the outer wall of the main body of the front guide sleeve B4.

[0044] Split nut 5, which is evenly divided into three blocks, and each block is assembled around the nut circumference to form a whole nut. The outer wall of one end of the whole nut is a conical structure C, and the inner wall of the other end is a conical structure D. According to the maximum overload force, the axial length of the thread is 5mm to ensure the connection strength of the three-piece nut.

[0045] The inner wall of the base 2 is provided with a groove for mounting spring B;

[0046] In this embodiment, spring B3 is selected as a YA 0.5×4×9 GB / T2089 ordinary cylindrical helical compression spring; spring A6 is selected as a YA 4×20×48.5 GB / T2089 ordinary cylindrical helical compression spring. The maximum load that the missile can withstand, i.e., the locking force, is calculated based on the maximum overload of the missile under actual conditions. Then, the spring pre-compression amount is calculated based on the stiffness of spring A, which is 37 N / mm. This pre-compression force can ensure that the power unit and the missile are reliably connected under the condition of maximum overload.

[0047] During assembly, first connect the rear guide sleeve A9 to the internal thread on the front end of the power unit, and connect the spindle 7 to the external thread on the power unit. Then, install the spring A6 into the rear guide sleeve A9, and put the rear guide sleeve B8 into the spindle and the rear guide sleeve A9. Finally, put the front guide sleeve A1 onto the spindle through the through hole A.

[0048] Under the action of the press, the power device is compressed, and spring A is compressed as the power device moves until the left end face of the rear guide sleeve A9 abuts against the inside of the bottom surface of the rear guide sleeve B8. The small diameter section of the mandrel 7 extends out of the through hole A. Using a suitable tool, the split nut 5 is inserted into the front guide sleeve A and fastened to the small diameter section of the mandrel 7 by threads, with the end of the nut 5 only touching the end face on the mandrel. Then the press is released, and spring A6 moves to the rear end under the action of the spring force. The tool is slowly released, and the outer conical surface of the split nut is positioned with the conical surface in the through hole A of the front guide sleeve A1, i.e. Figure 1 The assembly state is shown; then the front guide sleeve B4 is pressed against the three-lobed nut 5, one end of the spring B3 is inserted into the cavity outside the bottom surface of the front guide sleeve B4, the base 2 is reliably connected to the front guide sleeve A1 by threads, the other end of the spring B3 abuts against the base, and finally the base is connected to the missile tail by bolts.

[0049] After assembly, under the tension of spring A6, the split nut 5 is located in the through hole A. At the same time, the conical structure C on the nut is adapted to the conical structure A in the through hole A, and the outer wall of the remaining structure of the nut is adapted to the inner wall of the large diameter section in the through hole A.

[0050] The front guide sleeve B4 is fitted onto the small-diameter section of the mandrel through an open end with a tapered structure. At the same time, the tapered structure B at the end is inserted into the split nut 5 and the tapered structure B is adapted to the tapered structure D. There is an axial distance L2 between the end face of the mandrel 7 away from the power device and the bottom surface of the front guide sleeve B. The outer wall of the front guide sleeve B4, the inner wall of the front guide sleeve A1, the protruding structure A, and the bottom surface of the front guide sleeve A1 form a cavity 10.

[0051] Thus, under the action of the pre-compression spring A6, the power unit and the missile tail or aircraft are reliably connected through the split nut. In this embodiment, L1 = 8mm, L2 = 7mm, and the compressible stroke of spring B L3 = 5mm.

[0052] During separation, under the pushing action of the power unit 11, the spring A6 is further compressed under the action of thrust, and at the same time, it drives the spring A, the spindle and the split nut to move towards the tail of the missile. When the split nut moves to the front guide cavity, the split nut is opened through the conical surface of the front guide sleeve B, the split nut is disengaged from the spindle thread and falls into the cavity.

[0053] The spindle moves forward further and presses against the front guide sleeve B, compressing the spring B.

[0054] When the power unit finishes working, spring A, spindle, and rear guide sleeves A and B, along with the power unit, separate backward under the tension of spring A6. At the same time, spring B3 pushes the front guide sleeve B backward through spring force, and the front guide sleeve B locks the various parts of the split nut in the cavity. Thus, during the backward movement of spring A, spindle, and rear guide sleeves A and B, the separation of the power unit and the missile is achieved.

[0055] The specific solution is that the materials of each component can be selected from reasonable metal materials, such as 7075 aluminum alloy for the three-lobed nut, mandrel, wedge device, base and upper and lower sleeves; and 60Si2MnA steel for the large spring and small spring.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power unit separation mechanism, characterized in that, The separation mechanism includes: Rear guide sleeve A (9), the main body of the rear guide sleeve A is a cylindrical structure, and one end of the axial direction is open; The rear guide sleeve B (8) has a cylindrical structure, with one end open in the axial direction and a bottom surface B at the other end, which has a through hole B. Mandrel (7), the main body of the mandrel has an installation structure at one end and a small diameter section at the other end, and the small diameter section forms an end face with the rest of the mandrel; Spring A (6); Front guide sleeve A (1), the main body of the front guide sleeve A is a cylindrical structure, and one end of the axial direction is an open structure, and the other end is provided with a bottom surface A, and a through hole A is provided on the bottom surface A. The axial middle section of the inner wall of the through hole A is a conical structure A, and the large diameter end of the conical structure A faces the inside of the front guide sleeve A. The front guide sleeve B (4) has a cylindrical structure as its main body and an open end in the axial direction. The outer wall of the open end is a conical structure B. The conical structure B is adapted to the conical structure A. Split nut (5), the split nut is divided into multiple independent blocks, and each block is assembled around the split nut to form an integral split nut, and the outer wall of one end of the integral split nut is a conical structure C, and the inner wall of the other end is a conical structure D; Spring B (3); Base (2) When using, One axial end of the rear guide sleeve A (9), the mounting structure end of the spindle (7) and the axial end of the spring A (6) are fixedly installed on the drive end of the power device. Meanwhile, the spindle (7) is located inside the rear guide sleeve A (9), and the spring A is located between the spindle and the rear guide sleeve A, and the three are coaxial. The rear guide sleeve B (8) is movably fitted outside the rear guide sleeve A (9) through its open end. The other axial end of the spring A (6) is fixed on the bottom surface B inside the rear guide sleeve B (8), and the spindle (7) passes through the through hole B, while the end face on the spindle protrudes from the through hole B. Under the tension of the spring A (6), there is an axial distance L2 between the end of the rear guide sleeve A (9) away from the power device and the bottom surface inside the rear guide sleeve B (8). The base (2) is fixedly installed on the open end of the front guide sleeve A (1), the spring B (3) is installed inside the front guide sleeve A, and the two ends of the spring B are respectively connected to the ends of the base and the front guide sleeve B; the front guide sleeve A (1) is fixedly installed on the driven object. The front guide sleeve A (1) is assembled on the mandrel (7) through the through hole A, and the end face of the mandrel is located inside the through hole A. At the same time, the small diameter section of the mandrel passes through the through hole A and is located inside the front guide sleeve A (1). Meanwhile, the front guide sleeve B (4) is fitted onto the small diameter section of the mandrel through the end opening with a tapered structure. The split nut (5) is assembled on the spindle (7), and under the tension of the spring A (6), the split nut is located in the through hole A. At the same time, the conical structure C on the split nut is adapted to the conical structure A in the through hole A. The outer wall of the remaining structure of the split nut is adapted to the inner wall of the large diameter section in the through hole A. One axial end of the split nut is attached to the end face on the spindle, and the other end extends out of the through hole A. At the same time, the conical structure B at the end of the front guide sleeve B (4) is inserted into the split nut (5) and the conical structure B is adapted to the conical structure D. The bottom surface of the end of the front guide sleeve B (4) away from the power device has an axial distance L1 from the end of the small diameter section of the spindle, L1>L2. Furthermore, a cavity (10) is formed between the outer wall of the front guide sleeve B (4) and the inner wall of the front guide sleeve A (1); Under the driving action of the power device (11), the rear guide sleeve A and the mandrel move in the pushing direction, the spring A is compressed, and the split nut is pushed into the cavity through the end face on the mandrel, so that each block structure enters the cavity; then the mandrel moves further in the direction of the thrust to push against the front guide sleeve B (4), the mandrel continues to move, and the spring B is compressed; after the power device stops working, under the tension of the spring A, the rear guide sleeve A (9), the rear guide sleeve B (8), the spring A and the mandrel move in the opposite direction to realize the separation of the mandrel from the front guide sleeve A, thereby realizing the separation of the power device from the driven object. At the same time, under the elastic force of the spring B, the front guide sleeve B (4) also moves in the opposite direction until the conical structure B matches the conical structure A, thereby sealing the split nut in the cavity.

2. The power unit separation mechanism according to claim 1, characterized in that, The base is provided with a groove for installing spring B.

3. The power unit separation mechanism according to claim 1, characterized in that, The outer wall of the bottom surface of the other end of the front guide sleeve B (4) is provided with a cavity for installing the spring B.

4. The power unit separation mechanism according to claim 1, characterized in that, The inner wall of the main body of the front guide sleeve A (1) and / or the outer wall of the main body of the front guide sleeve B (4) are provided with a ring of protruding structure A; When in use, the outer wall of the front guide sleeve B (4), the inner wall of the front guide sleeve A (1), the protruding structure A, and the bottom surface of the front guide sleeve A (1) with through hole A form a cavity.

5. The power unit separation mechanism according to claim 1, characterized in that, The split nut (5) is evenly divided into three independent blocks.

6. The power unit separation mechanism according to claim 1, characterized in that, The split nut (5) and the spindle (7) are connected by threads.

7. The power unit separation mechanism according to claim 1, characterized in that, The split nut, mandrel, rear guide sleeve A, rear guide sleeve B, front guide sleeve A and front guide sleeve B are made of aluminum alloy; spring A and spring B are made of steel.

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