Recoil buffering device based on compliant mechanism

Abstract

The invention discloses a recoil buffering device based on a compliant mechanism. The recoil buffering device comprises a compliant buffering unit, an energy absorption unit used for achieving energy dissipation, an instrument fixing device connected with a recoil instrument and a supporting body connecting shaft connected with a recoil instrument supporting body. The instrument fixing device and the supporting body connecting shaft are arranged on the two sides of the middle of the flexible buffering unit respectively, and the energy absorption units are arranged on the two sides of the flexible buffering unit and make contact with the two sides of the instrument fixing device respectively. When the recoil instrument performs recoil movement, the recoil instrument drives the flexible buffer unit to deform through the instrument fixing device, the buffering process is started, and the buffered force is transmitted to the supporting body connecting shaft through the flexible buffer unit and then is further transmitted to the weapon recoil supporting body. The buffer device has the advantages of being small in size, convenient to disassemble, assemble and carry and the like, the problems that an existing buffer device is large in part number, large in size, difficult to disassemble, assemble and carry and the like are solved, and light weight and accurate design of the buffer device are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of buffering and vibration reduction equipment, and in particular relates to a recoil buffering device based on a compliant mechanism. Background Art

[0002] During the launch of an aircraft, the high-pressure gas in the chamber drives the aircraft to accelerate forward. At the same time, the high-pressure gas also acts on the bottom of the aircraft to drive the aircraft to accelerate backward, which is the recoil movement, exerting a force on the aircraft support body, which is the recoil generated by the aircraft during the launch. If no intervention is made on the aircraft recoil, excessive recoil may damage the aircraft support body (such as connecting shafts, bearings, aircraft brackets, or motors and reducers of electromechanical systems), causing them to lose their support effect, further causing the aircraft to lose its combat effectiveness. Therefore, by installing a buffer device between the aircraft and its support body, the recoil force transmitted to the aircraft support body will be reduced and delayed, thereby protecting the aircraft support body.

[0003] The common solution for buffer devices is to use a buffer device with spring as the main body. The spring buffer device has many components and a complex structure, including guide rods, tightening bolts, support body fixing seats, recoil device mounting seats, pins, copper rings and other main structural parts. During the buffering process, the guide deviation is reduced by guide rods, slide rails, etc., but the reset accuracy cannot be effectively guaranteed due to factors such as friction and assembly clearance.

[0004] From the above, it can be seen that when the existing technology sets the buffer device, most of them use a structure with springs as the main functional elements, and a single one or several springs cannot form an independent buffer device, so a large number of other parts and components are required to cooperate and constrain to realize the buffer device with springs as the main structure. Moreover, due to the friction and assembly clearance of the guide rods and slide rails, the guide reset accuracy of the spring buffer device is low. Specifically, other parts include guide rods, tightening bolts, support body fixing seats, recoil device mounting seats, pins, copper rings, etc., with complex structure, many assembly parts and large assembly errors. Moreover, springs are usually made of standard parts, and the materials, heat treatment, molding, cutting and other factors in the processing of standard springs have a great influence on their performance, which is specifically manifested as a great influence on the spring stiffness. The produced spring stiffness usually does not match the calculated stiffness, and there is a large error, which is not convenient for the precise design of the buffer device. In addition, the influence of factors such as clearance and friction in the assembly process of the spring buffer device further makes it impossible to accurately design the buffer device.

[0005] The prior art uses a compliant mechanism to implement a buffer device. In order to meet the load-bearing requirements or the pointing accuracy requirements of the buffer device, a symmetrical arrangement method is often adopted during use, which increases the volume and weight of the buffer device, fails to meet the lightweight requirements, and is difficult to disassemble and carry. Summary of the invention

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

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A recoil buffer device based on a compliant mechanism comprises: a compliant buffer unit, an energy absorbing unit, an instrument fixing device and a supporting body connecting shaft; the instrument fixing device and the supporting body connecting shaft are respectively arranged on both sides of the middle part of the compliant buffer unit, the energy absorbing unit is arranged on both sides of the compliant buffer unit, and the movable ends of the energy absorbing unit are respectively in contact with both sides of the instrument fixing device; the energy absorbing unit is used to realize recoil energy dissipation; the instrument fixing device is used to be fixedly connected to the recoil instrument, and the supporting body connecting shaft is used to be fixedly connected to the recoil instrument supporting body, so as to realize unilateral fixation of the recoil buffer device between the recoil instrument and the recoil instrument supporting body; when the recoil instrument undergoes recoil movement, the recoil instrument drives the compliant buffer unit to deform through the instrument fixing device, and the buffering process begins, and the buffered impact force is transmitted to the supporting body connecting shaft through the compliant buffer unit, and then further transmitted to the weapon recoil supporting body.

[0009] As a further improvement of the present invention, the energy absorption unit includes a first fixing frame, a second fixing frame and a hydraulic damper, the first fixing frame and the second fixing frame are respectively fixed on two sides of the flexible buffer unit, the fixed end of the hydraulic damper is connected to the fixing 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 comprises: an upper rigid body, a lower rigid body and a compliant beam, and a plurality of the compliant beams are arranged between the upper rigid body and the lower rigid body; the compliant buffer unit is obtained by integrated processing 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 deformation of the compliant beam is used to complete the storage of the back-sit energy.

[0012] As a further improvement of the present invention, a hole is opened in the middle of the upper rigid body, and a plurality of mounting through holes are evenly distributed around the periphery of the opening position, so as to realize a fixed connection between the supporting body connecting shaft and the flexible 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 side ends of the upper rigid body, and the width of the first fixing frame and the width of the second fixing frame are both the same as the width of the upper rigid body.

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

[0015] As a further improvement of the present invention, there is a certain gap between the inner side of the instrument fixing device and the side of the flexible buffer unit.

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

[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 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:

[0019] 1. The present invention provides a recoil buffer device based on a compliant mechanism, which realizes that the recoil buffer device is fixed on one side between the recoil device and the recoil device support body by arranging the instrument fixing device and the supporting body connecting shaft on the two sides of the middle part of the compliant buffer unit respectively, and the instrument fixing device is fixedly connected to the recoil device, and the supporting body connecting shaft is fixedly connected to the recoil device support body by the supporting body connecting shaft, so that the recoil buffer device is fixed on one side between the recoil device and the recoil device support body, and the recoil energy is dissipated by the energy absorption units arranged on the two sides of the compliant buffer unit and the two sides of the instrument fixing device. The buffer device has a simple composition, few parts, is easy to process, is small in size and light in weight, is easy to disassemble and carry, and solves the problems of lightweight and precise design of the buffer device.

[0020] 2. The present invention provides a recoil buffer device based on a compliant mechanism, which has a large stiffness in the non-working direction, and basically no movement and deformation will occur in the non-working direction during the buffering process. There is no friction and assembly gap in the buffering direction, and a high guiding accuracy is achieved. 3. The present invention provides a recoil buffer device based on a compliant mechanism, which utilizes the elastic deformation of the compliant beam and combines the energy dissipation capacity of a small hydraulic damper to effectively buffer the recoil of the instrument, reduce the impact force transmitted from the instrument to the connecting device, and protect the connecting device of the instrument. Furthermore, the stiffness of the compliant buffer unit is only affected by the basic unit of the constituent mechanism, the compliant beam. The stiffness of the compliant beam is less affected by factors during processing and can be accurately calculated, thereby achieving a precise design of the recoil buffer device. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 4 It is a schematic diagram of the left-side structural principle of the recoil buffer device based on the compliant mechanism of the present invention.

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

[0026] Figure 6 The figure is a schematic diagram of 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 DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0029] Example

[0030] like Figures 1 to 6As shown, the recoil buffer device based on the compliant mechanism of the present invention comprises: a compliant buffer unit 1, an energy absorbing unit, an instrument fixing device 4 and a supporting body connecting shaft 5. The instrument fixing device 4 and the supporting body connecting shaft 5 are respectively arranged on both sides of the middle part of the compliant buffer unit 1, and the energy absorbing unit is arranged on both sides of the compliant buffer unit 1, and the energy absorbing unit contacts both sides of the instrument fixing device 4 respectively; the energy absorbing unit is used to realize recoil energy dissipation. The instrument fixing device 4 is used to be fixedly connected with the recoil instrument, and the supporting body connecting shaft 5 is used to be fixedly connected with the supporting body of the recoil instrument, so as to realize that the recoil buffer device is fixed on one side between the recoil instrument and the supporting body of the recoil instrument. When the recoil instrument undergoes recoil movement, the recoil instrument drives the compliant buffer unit 1 to deform through the instrument fixing device 4, and the buffering process begins. The impact force after buffering is transmitted to the supporting body connecting shaft 5 through the compliant buffer unit 1, and then further transmitted to the recoil supporting body of the weapon.

[0031] In the present embodiment, the recoil buffer device is fixed on one side between the recoil device and the recoil device supporting body by arranging the instrument fixing device and the supporting body connecting shaft on the two sides of the middle part of the compliant buffer unit respectively, and the recoil buffer device is fixedly connected to the recoil device by the instrument fixing device, and the supporting body connecting shaft is fixedly connected to the recoil device supporting body. The recoil energy dissipation is achieved by using the energy absorption units arranged on the two sides of the compliant buffer unit and the two sides of the instrument fixing device. The buffer device has a simple composition, few parts, is easy to process, has a small size and light weight, is easy to disassemble and carry, and solves 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 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 respectively fixed on two sides of the flexible buffer unit 1, the fixed end of the hydraulic damper 3 is connected to the fixing 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 fixing frame 2a and the hydraulic damper 3 form the front energy absorption unit of the recoil buffer device, and the second fixing frame 2b and the hydraulic damper 3 form the rear energy absorption unit of the recoil buffer device. Specifically, the outer side of the hydraulic damper 3 has an external thread, and a circular through hole is opened at the right end of the first fixing frame 2a. The hydraulic damper 3 passes through the circular through hole as a whole, and a spring washer and a nut are installed on both sides to fix the hydraulic damper 3 on the first fixing frame 2a, and together they form the front energy absorption unit. Further, two circular through holes are opened at the upper end of the damper fixing frame 2a, and the front energy absorption unit is fixed to the front end of the compliant buffer unit 1 through the two through holes by two screws. The damper fixing frame 2b and the damper fixing frame 2a are mirror-symmetrical in structure. The connection method of the second fixing frame 2b and the hydraulic damper 3 is exactly the same as the connection method of the first fixing frame 2a and the hydraulic damper 3, and together they form the rear energy absorption unit. The rear energy absorbing unit is fixed to the rear end of the flexible buffer unit 1 in the same manner as the connection between the front energy absorbing unit and the flexible buffer unit 1. When the buffer device does not move or deform, the head movable ends of the hydraulic dampers 3 in the front energy absorbing unit and the rear energy absorbing unit are in contact with the two end faces of the instrument fixture 4 respectively. During the buffering process, the two end faces of the instrument fixture 4 compress the two hydraulic dampers 3 in the front and rear movement directions respectively, thereby completing the dissipation of the backseat energy.

[0034] like Figure 1 and Figure 6 As shown, in this embodiment, the compliant buffer unit 1 comprises: an upper rigid body 11, a lower rigid body 12 and a compliant beam 13, and a plurality of compliant beams 13 are arranged between the upper rigid body 11 and the lower rigid body 12. The compliant buffer unit 1 is obtained by integrated processing 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 deformation of the compliant beam 13 is used to complete the storage of the back-sit energy.

[0036] In this embodiment, the energy storage during the buffering process is achieved by the deformation of the compliant beam 13. The stiffness of the compliant beam 13 determines the stiffness of the buffer device as a whole, and further determines the amount of energy that can be stored during the buffering process. The use of a compliant mechanism to implement a recoil buffer device greatly reduces the number of supporting parts. At the same time, the buffer device does not adopt the traditional symmetrical layout, but is fixed on one side between the recoil device and the recoil device support body, thereby achieving lightweight recoil buffer devices. At the same time, by selecting the compliant beam material and designing the geometric parameters, the stiffness of the recoil buffer device can be precisely controlled, and a recoil buffer device that meets different usage requirements can be quickly and accurately designed.

[0037] like Figure 6As shown, in this embodiment, a hole is opened in the middle of the upper rigid body 11 for weight reduction, and a plurality of mounting through holes are evenly distributed on the periphery of the opening position, and corresponding threaded holes are evenly opened around the circumference at one end of the supporting body connecting shaft 5 for achieving fixed connection between the supporting body connecting shaft 5 and the flexible 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 side 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 where the fixing frame is connected to the flexible buffer unit 1 is the same as the thickness of the side of the upper rigid body 11 of the flexible buffer unit 1, and the portion other than the connection surface is grooved to prevent the flexible beam 13 and the fixing frame from generating motion interference during the buffering process.

[0039] like Figure 5 and Figure 6 As shown, in this embodiment, a plurality of 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, which are fixed by screws to realize a fixed connection between the instrument fixing device 4 and the flexible 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 fixture 4 and the side of the flexible buffer unit 1. Specifically, the inner side of the upper part of the instrument fixture 4 and the side installed on the flexible buffer unit 1 are kept at a distance through the slot to prevent the flexible beam 13 and the instrument fixture 4 from generating motion interference during the buffering process.

[0041] like Figure 1 As shown, in this embodiment, a through hole 41 is provided in the middle of the device fixing device 4 to reduce the weight of the recoil buffer device. A plurality of threaded holes are symmetrically provided 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 recoil device support body.

[0043] When the recoil device performs recoil movement, it drives the device fixing device 4 to move. The device fixing device 4 drives the lower rigid body 12 of the flexible buffer unit 1 to move, causing the flexible beam 13 of the flexible buffer unit 1 to deform, thereby realizing the storage of recoil energy. Through the flexible beam 13, the force is transmitted to the upper rigid body 11 of the flexible buffer unit 1, and then the buffered smaller recoil force is transmitted to the recoil device support body through the support body connecting shaft 5. During the buffering movement, that is, the reciprocating movement of the lower rigid body 12 of the flexible buffer unit 1 and its connecting structure, and the reciprocating deformation of the flexible beam 13, the front and rear end faces of the device fixing device 4 compress the front and rear hydraulic dampers 3 during the movement, and the hydraulic damper 3 completes the dissipation of the 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 is combined with the energy dissipation capacity of the small hydraulic damper 3 to effectively buffer the recoil of the device, reduce the impact force transmitted from the device to the connecting device, and protect the device connecting device. Furthermore, the rigidity of the compliant buffer unit 1 is only affected by the basic unit of the mechanism, the compliant beam 13. The rigidity of the compliant beam 13 is less affected by the factors during processing, and can be accurately calculated, thereby realizing the accurate design of the recoil buffer device.

[0045] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the spirit and technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A recoil buffer device based on a compliant mechanism, characterized in that: include: A compliant buffer unit (1), an energy absorbing unit, an apparatus fixing device (4) and a supporting body connecting shaft (5); the apparatus fixing device (4) and the supporting body connecting shaft (5) are respectively arranged on both sides of the middle part of the compliant buffer unit (1); the energy absorbing unit is arranged on both sides of the compliant buffer unit (1), and the energy absorbing unit contacts both sides of the apparatus fixing device (4); the energy absorbing unit is used to dissipate recoil energy; the apparatus fixing device (4) is used to be fixedly connected to a recoil apparatus, and the supporting body connecting shaft (5) is used to be fixedly connected to a recoil apparatus supporting body, so that the recoil force buffer device is fixed on one side between the recoil apparatus and the recoil apparatus supporting body; when the recoil apparatus undergoes recoil movement, the recoil apparatus drives the compliant buffer unit (1) to deform through the apparatus fixing device (4), and the buffering process begins; the impact force after buffering is transmitted to the supporting body connecting shaft (5) through the compliant buffer unit (1), and then further transmitted to the recoil apparatus supporting body.

2. The recoil buffer device based on a compliant mechanism according to claim 1, characterized in that: 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 respectively fixed to two sides of the compliant buffer unit (1); the fixed end of the hydraulic damper (3) is connected to the fixing frame; and the movable end of the hydraulic damper (3) is in contact with the side of the instrument fixing device (4).

3. The recoil buffer device based on the compliant mechanism according to claim 2, characterized in that: The compliant buffer unit (1) comprises: an upper rigid body (11), a lower rigid body (12) and a compliant beam (13); a plurality of the compliant beams (13) are arranged between the upper rigid body (11) and the lower rigid body (12); and the compliant buffer unit (1) is obtained by integrated processing using a wire cutting method.

4. The recoil buffer device based on a compliant mechanism according to claim 3, characterized in that: During the buffering process, the upper rigid body (11) and the lower rigid body (12) move relative to each other via the deformed compliant beam (13), and the deformation of the compliant beam (13) is used to complete the storage of the back-sit energy.

5. The recoil buffering device based on a compliant mechanism according to claim 3, characterized in that: The upper rigid body (11) has a hole in the middle, and a plurality of mounting through holes are evenly distributed around the opening, for achieving fixed connection between the support body connecting shaft (5) and the compliant buffer unit (1).

6. The recoil buffering device based on a compliant mechanism according to claim 3, characterized in that: The first fixing frame (2a) and the second fixing frame (2b) are respectively fixed to the two side 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 both the same as the width of the upper rigid body (11).

7. The recoil buffer device based on a compliant mechanism according to claim 3, characterized in that: The lower rigid body (12) is evenly distributed with a plurality of mounting through holes in the middle thereof, which are used to realize fixed connection between the instrument fixing device (4) and the flexible buffer unit (1).

8. The recoil buffering device based on a compliant mechanism according to claim 6, characterized in that: There is a certain gap between the inner side of the instrument fixing device (4) and the side of the flexible buffer unit (1).

9. The recoil buffering device based on a compliant mechanism according to claim 3, characterized in that: A through hole (41) is provided in the middle of the device fixing device (4) to reduce the weight of the recoil buffer device; a plurality of threaded holes are symmetrically provided on both sides of the through hole (41) for fixed connection with the recoil device.

10. The recoil buffer device based on a compliant mechanism according to claim 3, characterized in that: 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 fixed connection between the support body connecting shaft (5) and the recoil device support body.

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