A recoil force mitigation device based on a compliant mechanism

Abstract

The application discloses a recoil force buffering device based on a compliant mechanism, which comprises a compliant buffering unit, an energy absorption unit for realizing energy dissipation, an instrument fixing device connected with a recoil instrument, and a support body connecting shaft connected with a recoil instrument support body; the instrument fixing device and the support body connecting shaft are respectively arranged on both sides of the middle part of the compliant buffering unit, and the energy absorption unit is arranged on both sides of the compliant buffering unit and respectively contacts both sides of the instrument fixing device; when the recoil instrument generates a recoil movement, the recoil instrument drives the compliant buffering unit to deform through the instrument fixing device, and a buffering process is started; the force after buffering is transmitted to the support body connecting shaft through the compliant buffering unit, and is further transmitted to the weapon recoil support body. The application has the advantages of small size, convenience in disassembly and carrying, and the like, solves the problems of a large number of parts, large size, difficulty in disassembly and carrying, and the like of the existing buffering device, and realizes lightweight and precise design of the buffering device.

Description

Technical Field

[0001] This invention belongs to the technical field of buffer and vibration damping equipment, specifically relating to a recoil buffer device based on a compliant mechanism. Background Technology

[0002] During launch, high-pressure combustion gases inside the launch chamber propel the aircraft forward at high speed. Simultaneously, these gases also act on the aircraft's underside, driving it backward at high speed – this recoil motion exerts a force on the aircraft's support structure. This is the recoil force generated during launch. If no intervention is applied to this recoil force, excessive force can damage the support structure (such as connecting shafts, bearings, aircraft brackets, or motors and reducers in the electromechanical system), causing it to lose its supporting function and ultimately rendering the aircraft ineffective in combat. Therefore, installing a buffer device between the aircraft and its support structure reduces and delays the recoil force transmitted to the support structure, thus protecting it.

[0003] The typical solution for buffer devices is to use spring-based buffers. Spring buffers have many components and complex structures, including guide rods, tightening bolts, support fixing seats, recoil mechanism mounting seats, pins, copper rings, and other major structural components. During the buffering process, guide rods and slide rails are used to reduce guiding deviations. However, due to factors such as friction and assembly gaps, the reset accuracy cannot be effectively guaranteed.

[0004] In summary, existing technologies for setting up buffer devices mostly use structures with springs as the main functional components. However, a single spring or a few springs cannot form an independent buffer device. Therefore, the cooperation and constraints of a large number of other components are required to realize a spring-based buffer device. Moreover, due to friction and assembly gaps in guide rods and slide rails, the guiding and resetting accuracy of spring buffer devices is relatively low. Specifically, other components include guide rods, tightening bolts, support fixing seats, recoil mechanism mounting seats, pins, copper rings, etc., resulting in a complex structure with many assembly parts and large assembly errors. Furthermore, springs are usually standard parts, and the material, heat treatment, forming, and cutting processes of standard springs have a significant impact on their performance, specifically on spring stiffness. The stiffness of the produced springs often does not match the calculated stiffness, resulting in a large error and hindering the precise design of the buffer device. In addition, the influence of gaps and friction during the assembly of spring buffer devices further complicates the design of the buffer device.

[0005] Existing technologies employ compliant mechanisms to implement buffer devices. In order to meet load-bearing requirements or the pointing accuracy requirements of buffer devices, a symmetrical arrangement method is often used during use. This increases the size and weight of the buffer device, making it impossible to achieve the requirement of lightweight design, and making disassembly, assembly, and transport difficult. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the problems of existing buffer devices, such as large size, difficulty in disassembly and carrying, low guiding and resetting accuracy, and difficulty in achieving precise design. The present invention provides a recoil buffer device based on a compliant mechanism that is compact in structure, small in size and light in weight, has good guiding and resetting performance, is easy to disassemble and carry, and has a significant buffering and vibration reduction effect.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A recoil buffer device based on a compliant mechanism includes: a compliant buffer unit, an energy absorption unit, a device fixing device, and a support connecting shaft; the device fixing device and the support connecting shaft are respectively disposed on both sides of the middle part of the compliant buffer unit, and the energy absorption unit is disposed on both sides of the compliant buffer unit, with the movable ends of the energy absorption unit respectively contacting both sides of the device fixing device; the energy absorption unit is used to dissipate recoil energy; the device fixing device is used to fixally connect to the recoil device, and the support connecting shaft is used to fixally connect to the recoil device support, so that the recoil buffer device is fixed on one side between the recoil device and the recoil device support; when the recoil device recoils, the recoil device drives the compliant buffer unit to deform through the device fixing device, starting the buffering process, and the buffered impact force is transmitted to the support connecting shaft through the compliant buffer unit, and then further transmitted to the weapon recoil support.

[0009] As a further improvement of the present invention, the energy absorption unit includes a first fixed frame, a second fixed frame, and a hydraulic damper. The first fixed frame and the second fixed frame are respectively fixed on both sides of the compliant buffer unit. The fixed end of the hydraulic damper is connected to the fixed frame, and the movable end of the hydraulic damper is in contact with the side of the instrument fixing device.

[0010] As a further improvement of the present invention, the compliant buffer unit includes: an upper rigid body, a lower rigid body, and compliant beams, with multiple compliant beams disposed between the upper rigid body and the lower rigid body; the compliant buffer unit is integrally processed by wire cutting.

[0011] As a further improvement of the present invention, during the buffering process, the upper rigid body and the lower rigid body move relative to each other through the deformed compliant beam, and the recoil energy is stored after the deformation of the compliant beam is completed.

[0012] As a further improvement of the present invention, the upper rigid body has an opening in the middle and multiple mounting through holes are evenly distributed on the outer periphery of the opening position to realize the fixed connection between the support body connecting shaft and the compliant buffer unit.

[0013] As a further improvement of the present invention, the first fixing frame and the second fixing frame are respectively fixed to the two ends of the upper rigid body, and the width of the first fixing frame and the width of the second fixing frame are the same as the width of the upper rigid body.

[0014] As a further improvement of the present invention, the lower rigid body has multiple mounting through holes evenly distributed in the middle, which are used to realize the fixed connection between the instrument fixing device and the compliant buffer unit.

[0015] As a further improvement of the present invention, the inner side of the instrument fixation device and the side of the compliant buffer unit have a certain gap.

[0016] As a further improvement of the present invention, the device fixing device is provided with a through hole in the middle to reduce the weight of the recoil buffer device; multiple threaded holes are symmetrically provided on both sides of the through hole for fixed connection with the recoil device.

[0017] As a further improvement of the present invention, a rectangular groove is provided on the side of the support body connecting shaft, and a locking pin is inserted into the rectangular groove to achieve a fixed connection between the support body connecting shaft and the recoil device support body.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] 1. This invention provides a recoil buffer device based on a compliant mechanism. By setting the instrument fixing device and the support connecting shaft on both sides of the middle of the compliant buffer unit, the instrument fixing device is fixedly connected to the recoil instrument, and the support connecting shaft is fixedly connected to the recoil instrument support. This achieves one-sided fixation of the recoil buffer device between the recoil instrument and the recoil instrument support. The recoil energy is dissipated by energy absorption units set on both sides of the compliant buffer unit and on both sides of the instrument fixing device. The buffer device has a simple composition, few parts, is easy to process, small in size and light in weight, and is easy to disassemble and carry. It solves the problems of lightweight and precise design of the buffer device.

[0020] 2. This invention provides a recoil buffer device based on a compliant mechanism. It exhibits high stiffness in the non-working direction, and during buffering, it experiences virtually no movement or deformation in this direction. Furthermore, it eliminates friction and assembly gaps in the buffering direction, achieving high guiding accuracy. 3. This invention provides a recoil buffer device based on a compliant mechanism. Utilizing the elastic deformation of the compliant beam, combined with the energy dissipation capability of a small hydraulic damper, it effectively buffers the recoil of the instrument, reducing the impact force transmitted from the instrument to the connecting device and protecting the connecting device. Furthermore, the stiffness of the compliant buffer unit is only affected by the basic unit of the component mechanism—the compliant beam. The stiffness of the compliant beam is less affected by factors during manufacturing, allowing for precise calculation and enabling accurate design of the recoil buffer device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the recoil buffer device based on the compliant mechanism of the present invention.

[0022] Figure 2 This is a schematic diagram of the main structural principle of the recoil buffer device based on the compliant mechanism of the present invention.

[0023] Figure 3 This is a top view schematic diagram of the recoil buffer device based on a compliant mechanism according to the present invention.

[0024] Figure 4 This is a schematic diagram of the left-side structure of the recoil buffer device based on a compliant mechanism according to the present invention.

[0025] Figure 5 This is a schematic diagram of the rear view structure of the recoil buffer device based on the compliant mechanism of the present invention.

[0026] Figure 6 This is a schematic diagram illustrating the structural principle of the compliant buffer unit in the recoil buffer device based on the compliant mechanism of the present invention.

[0027] Legend: 1. Compliant buffer unit; 11. Upper rigid body; 12. Lower rigid body; 13. Compliant beam; 2a. First fixed frame; 2b. Second fixed frame; 3. Hydraulic damper; 4. Instrument fixing device; 41. Through hole; 5. Support body connecting shaft; 51. Rectangular groove. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0029] Example

[0030] like Figures 1 to 6As shown, the recoil buffer device based on a compliant mechanism of the present invention includes: a compliant buffer unit 1, an energy absorption unit, a device fixing device 4, and a support connecting shaft 5. The device fixing device 4 and the support connecting shaft 5 are respectively disposed on both sides of the middle portion of the compliant buffer unit 1, and the energy absorption unit is disposed on both sides of the compliant buffer unit 1, respectively contacting both sides of the device fixing device 4; the energy absorption unit is used to dissipate recoil energy. The device fixing device 4 is used for fixed connection with the recoil device, and the support connecting shaft 5 is used for fixed connection with the recoil device support, so that the recoil buffer device is fixed on one side between the recoil device and the recoil device support. When the recoil device recoils, the recoil device causes the compliant buffer unit 1 to deform through the device fixing device 4, initiating the buffering process. The buffered impact force is transmitted through the compliant buffer unit 1 to the support connecting shaft 5, and then further transmitted to the weapon recoil support.

[0031] In this embodiment, by setting the instrument fixing device and the support connecting shaft on both sides of the middle of the compliant buffer unit, the instrument fixing device is fixedly connected to the recoil device, and the support connecting shaft is fixedly connected to the recoil device support. This achieves the recoil buffer device being fixed on one side between the recoil device and the recoil device support. The recoil energy is dissipated by the energy absorption units set on both sides of the compliant buffer unit and on both sides of the instrument fixing device. The buffer device has a simple composition, few parts, is easy to process, small in size and light in weight, and is easy to disassemble and carry, thus solving the problems of lightweight and precise design of the buffer device.

[0032] like Figure 1 and Figure 2 As shown, in this embodiment, the energy absorption unit includes a first fixed frame 2a, a second fixed frame 2b, and a hydraulic damper 3. The first fixed frame 2a and the second fixed frame 2b are respectively fixed on both sides of the compliant buffer unit 1. The fixed end of the hydraulic damper 3 is connected to the fixed frame, and the movable end of the hydraulic damper 3 is in contact with the side of the instrument fixing device 4.

[0033] In this embodiment, the first fixed frame 2a and the hydraulic damper 3 form the front energy absorption unit of the recoil buffer device, and the second fixed frame 2b and the hydraulic damper 3 form the rear energy absorption unit of the recoil buffer device. Specifically, the hydraulic damper 3 has external threads on its outer side, and the right end of the first fixed frame 2a has a circular through hole. The hydraulic damper 3 passes entirely through the circular through hole, and is fixed to the first fixed frame 2a by installing a spring washer and a nut on each side, together forming the front energy absorption unit. Furthermore, the upper end of the damper fixed frame 2a has two circular through holes, and the front energy absorption unit is fixed to the front end of the compliant buffer unit 1 by two screws through the two through holes. The damper fixed frame 2b and the damper fixed frame 2a are mirror symmetrical in structure. The connection method between the second fixed frame 2b and the hydraulic damper 3 is exactly the same as that between the first fixed frame 2a and the hydraulic damper 3, together forming the rear energy absorption unit. The rear energy absorption unit is fixed to the rear end of the compliant buffer unit 1, and the fixing method is exactly the same as the connection method between the front energy absorption unit and the compliant buffer unit 1. When the buffer device does not move or deform, the movable ends of the hydraulic dampers 3 in the front and rear energy absorption units are in contact with the two end faces of the instrument fixation device 4, respectively. During the buffering process, the two end faces of the instrument fixation device 4 compress the two hydraulic dampers 3 in the front and rear movement directions, respectively, thus dissipating the recoil energy.

[0034] like Figure 1 and Figure 6 As shown, in this embodiment, the compliant buffer unit 1 includes an upper rigid body 11, a lower rigid body 12, and compliant beams 13, with multiple compliant beams 13 disposed between the upper rigid body 11 and the lower rigid body 12. The compliant buffer unit 1 is integrally machined by wire cutting.

[0035] Furthermore, during the buffering process, the upper rigid body 11 and the lower rigid body 12 move relative to each other through the deformed compliant beam 13, and the recoil energy is stored after the deformation of the compliant beam 13.

[0036] In this embodiment, energy storage during the buffering process relies on the deformation of the compliant beam 13. The stiffness of the compliant beam 13 determines the overall stiffness of the buffer device, which in turn determines the amount of energy that can be stored during the buffering process. Utilizing a compliant mechanism to implement the recoil buffer device significantly reduces the number of supporting components. Furthermore, instead of employing a traditional symmetrical layout, the buffer device is fixed on one side between the recoil mechanism and its support, achieving a lightweight design. Simultaneously, by selecting the compliant beam material and designing its geometric parameters, precise control of the recoil buffer device's stiffness can be achieved, enabling the rapid and accurate design of recoil buffer devices that meet different usage requirements.

[0037] like Figure 6As shown, in this embodiment, the upper rigid body 11 has a hole in the middle for weight reduction, and multiple mounting through holes are evenly distributed on the outer periphery of the hole position. One end of the support body connecting shaft 5 has corresponding threaded holes evenly distributed around the circumference for fixing the support body connecting shaft 5 to the compliant buffer unit 1.

[0038] like Figure 1 and Figure 4 As shown, in this embodiment, the first fixing frame 2a and the second fixing frame 2b are respectively fixed to the two ends of the upper rigid body 11, and the width of the first fixing frame 2a and the width of the second fixing frame 2b are the same as the width of the upper rigid body 11. The width of the side of the fixing frame connected to the compliant buffer unit 1 is the same as the thickness of the side of the upper rigid body 11 of the compliant buffer unit 1. The part other than the connecting surface is slotted to prevent the compliant beam 13 from interfering with the movement of the fixing frame during the buffering process.

[0039] like Figure 5 and Figure 6 As shown in this embodiment, multiple mounting through holes are evenly distributed in the middle of the lower rigid body 12, and corresponding small holes are evenly opened in the lower part of the instrument fixing device 4. The device is fixed by screws to achieve a fixed connection between the instrument fixing device 4 and the compliant buffer unit 1.

[0040] like Figure 3 and Figure 4 As shown, in this embodiment, there is a certain gap between the inner side of the instrument fixation device 4 and the side of the compliant buffer unit 1. Specifically, the upper inner side of the instrument fixation device 4 and the side installed on the compliant buffer unit 1 are kept at a distance by a slot to prevent motion interference between the compliant beam 13 and the instrument fixation device 4 during the buffering process.

[0041] like Figure 1 As shown, in this embodiment, the device fixing device 4 has a through hole 41 in the middle to reduce the weight of the recoil buffer device. Multiple threaded holes are symmetrically arranged on both sides of the through hole 41 for fixed connection with the recoil device.

[0042] like Figure 3 As shown, in this embodiment, a rectangular groove 51 is provided on the side of the support body connecting shaft 5, and a locking pin is inserted into the rectangular groove 51 to achieve a fixed connection between the support body connecting shaft 5 and the rear recoil device support body.

[0043] When the recoil mechanism performs its recoil motion, it drives the mechanism fixing device 4 to move. The mechanism fixing device 4, in turn, drives the lower rigid body 12 of the compliant buffer unit 1 to move, causing the compliant beam 13 of the compliant buffer unit 1 to deform, thus storing recoil energy. Through the compliant beam 13, the force is transmitted to the upper rigid body 11 of the compliant buffer unit 1, and then, through the support connecting shaft 5, the buffered, smaller recoil force is transmitted to the recoil mechanism support. During the buffering process, that is, during the reciprocating motion of the lower rigid body 12 and its connecting structure of the compliant buffer unit 1, and the reciprocating deformation of the compliant beam 13, the front and rear end faces of the mechanism fixing device 4 compress the front and rear hydraulic dampers 3 during the movement. The hydraulic dampers 3 dissipate recoil energy through the friction between the internal moving cylinder and the hydraulic oil.

[0044] In this embodiment, the elastic deformation of the compliant beam 13, combined with the energy dissipation capability of the small hydraulic damper 3, effectively buffers the recoil force of the instrument, reduces the impact force transmitted from the instrument to the connecting device, and protects the instrument connecting device. Furthermore, the stiffness of the compliant buffer unit 1 is only affected by the basic unit of the constituent mechanism—the compliant beam 13. The stiffness of the compliant beam 13 is less affected by factors during processing and can be accurately calculated, enabling precise design of the recoil buffer device.

[0045] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the spirit and technical essence of the invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A recoil cushion device based on a compliant mechanism, characterized by, The application relates to a recoil force buffer device, which comprises a compliant buffer unit (1), an energy absorption unit, an instrument fixing device (4) and a support body connecting shaft (5); the instrument fixing device (4) and the support body connecting shaft (5) are arranged at the two sides of the middle part of the compliant buffer unit (1) respectively, the energy absorption unit is arranged at the two side parts of the compliant buffer unit (1) and contacts the two sides of the instrument fixing device (4) respectively, the energy absorption unit is used for realizing energy dissipation of recoil; the instrument fixing device (4) is used for being fixedly connected with a recoil instrument, and the support body connecting shaft (5) is used for being fixedly connected with a recoil instrument support body, so that the recoil force buffer device is fixed between the recoil instrument and the recoil instrument support body on one side; when the recoil instrument moves, the recoil instrument drives the compliant buffer unit (1) to deform through the instrument fixing device (4), and the buffer process is started; the impact force after the buffer is transmitted to the support body connecting shaft (5) through the compliant buffer unit (1) and is further transmitted to the recoil instrument support body. The energy absorption unit comprises a first fixing frame (2a), a second fixing frame (2b) and a hydraulic damper (3); the first fixing frame (2a) and the second fixing frame (2b) are fixed at the two side parts of the compliant buffer unit (1) respectively, the fixed end of the hydraulic damper (3) is connected with the fixing frame, and the movable end of the hydraulic damper (3) contacts the side part of the instrument fixing device (4). The compliant buffer unit (1) comprises an upper rigid body (11), a lower rigid body (12) and compliant beams (13); a plurality of the compliant beams (13) are arranged between the upper rigid body (11) and the lower rigid body (12); the compliant buffer unit (1) is integrally processed by a wire cutting mode.

2. The compliant mechanism-based recoil buffering device of claim 1, wherein, During the buffer process, the upper rigid body (11) and the lower rigid body (12) move relatively through the deformed compliant beams (13) and store the recoil energy by using the deformation of the compliant beams (13).

3. The compliant mechanism-based recoil buffering device of claim 2, wherein, The middle part of the upper rigid body (11) is provided with a plurality of mounting through holes which are uniformly distributed on the outer periphery of the hole position and are used for realizing the fixed connection of the support body connecting shaft (5) and the compliant buffer unit (1).

4. The compliant mechanism-based recoil buffering device of claim 2, wherein, The first fixing frame (2a) and the second fixing frame (2b) are fixed at the two side end parts of the upper rigid body (11) respectively, and the width of the first fixing frame (2a) and the width of the second fixing frame (2b) are the same as the width of the upper rigid body (11).

5. The compliant mechanism-based recoil buffering device of claim 2, wherein, The middle part of the lower rigid body (12) is uniformly provided with a plurality of mounting through holes which are used for realizing the fixed connection of the instrument fixing device (4) and the compliant buffer unit (1).

6. The compliant mechanism-based recoil buffering device of claim 2, wherein, The inner side of the instrument fixing device (4) has a certain gap with the side part of the compliant buffer unit (1).

7. The compliant mechanism-based recoil buffering device of claim 5, wherein, The middle part of the instrument fixing device (4) is provided with a through hole (41) for weight reduction of the recoil force buffer device; a plurality of screw holes are symmetrically arranged at the two sides of the through hole (41) and are used for being fixedly connected with the recoil instrument.

8. The compliant mechanism-based recoil buffering device of claim 2, wherein, The side part of the support body connecting shaft (5) is provided with a rectangular groove (51), and a locking pin is inserted into the rectangular groove (51) to realize the fixed connection of the support body connecting shaft (5) and the recoil instrument support body.

9. The compliant mechanism-based recoil buffering device of claim 2, wherein, ​

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