An integrated locking device for LRM module

Abstract

This invention discloses an integrated locking device for an LRM module, comprising a locking bar and a pull-out aid. The locking bar has a three-section structure, consisting of a left short section locking groove, a long section locking groove, and a right short section locking groove arranged in a series of inclined surfaces. A locking pin is fitted inside the locking bar, with a sliding fit between the long section locking groove and the locking pin, allowing the long section locking groove to protrude from the surface of the locking bar. A spring plate is fitted in the middle of the locking pin, engaging with the long section locking groove. A drive shaft is located at the left end of the locking pin, with a first spring mounted on it, and a connecting hole is provided on the locking pin. The pull-out aid includes a main body and a pull-out pressure head located at the right end of the main body. A locking tongue is elastically fitted within the main body, and a push rod linked to the locking tongue is located on the side of the main body. A rotating shaft connected to the end of the drive shaft is located in the pull-out pressure head. During rotation, the pull-out aid drives the locking pin shaft to move to the left via the drive shaft, causing the long section locking groove to protrude from the surface of the locking bar.

Description

Technical Field

[0001] This invention relates to the field of circuit structure design, and more specifically to an integrated locking device for an LRM module. Background Technology

[0002] Currently, many aircraft use second-generation avionics systems based on LRU (Line Replaceable Module) architectures. These systems are complex, have long development cycles, high costs, poor reliability, and complex maintenance. To address these issues, the United States launched the Gemstone Pillar and Gemstone Platform programs at the end of the last century. The direct result is the third- and fourth-generation integrated avionics systems used on next-generation fighters such as the F-22 and F-35. Integrated avionics systems offer good openness, low life-cycle costs, and excellent reliability and compatibility. The hardware foundation for these advantages is the LRM (Line Replaceable Module).

[0003] Given the advantages of the LRM structure, the number of LRM modules used is increasing year by year, while the requirements for field maintenance time are also getting higher and higher; therefore, higher requirements are placed on the plug-in and unplugging device that determines the reliability of LRM module installation and rapid maintenance.

[0004] Currently, circuit board locking structures on the market all adopt a separate design of locking strips and pull-out aids. The installation method of the locking strip requires the use of a screwdriver to complete the disassembly of the circuit board, making it difficult to achieve quick disassembly of the circuit board. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated locking device for LRM modules, which overcomes the problem that existing technologies require additional tools for installation and disassembly.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] An integrated locking device for an LRM module includes a locking bar and a pull-out aid, wherein:

[0008] The locking bar has a three-section structure, consisting of a left short section locking groove, a long section locking groove, and a right short section locking groove that fit together at an angle. A locking pin is installed inside the locking bar. The right end of the locking pin is fixed in the right short section locking groove, while the remaining part is fitted into the long section locking groove and the left short section locking groove. The locking pin can slide axially relative to the left short section locking groove. The long section locking groove and the locking pin are in a sliding fit, allowing the long section locking groove to protrude from the surface of the locking bar. A spring groove is formed in the middle of the locking pin, in which a spring plate is installed, which engages with the long section locking groove. A drive shaft is located at the left end of the locking pin, and a first spring is mounted on the drive shaft. The two ends of the first spring are supported by the left end of the locking pin and the end of the left short section locking groove, respectively. A connecting hole is provided on the locking pin.

[0009] The pull-out aid includes a main body and a pull-out pressure head located at the right end of the main body; a locking tongue is elastically fitted in the main body, which can extend from the left end of the main body or retract into the main body, and a push rod linked to the locking tongue is provided on the side of the main body; a rotating shaft connected to the end of the drive shaft is provided in the pull-out pressure head, and during the rotation of the pull-out aid, the drive shaft drives the locking pin to move to the left, causing the first spring to compress, and with the assistance of the spring plate, the long section locking groove protrudes from the surface of the locking bar.

[0010] Furthermore, the locking bar is a rectangular groove structure with a concave cross-section, and the length of the long locking groove is greater than the other two locking grooves.

[0011] Furthermore, the locking pin is an integral structure, and the lower end of the locking pin is provided with a limiting slider, so that the cross-section of the locking pin is T-shaped; and the inside of the long section locking groove of the locking bar is provided with a limiting edge; when the long section locking groove slides relative to the locking pin until the limiting slider contacts the limiting edge, it cannot continue to slide.

[0012] Furthermore, after inserting the locking pin into the locking bar, the locking screw is screwed into the right short section locking groove and the locking hole on the right end of the locking pin to fix the locking pin to the right short section locking groove.

[0013] Furthermore, the spring sheet has a centrally raised structure, with both ends supported in the spring groove. The spring sheet engages with the limiting edge of the long section locking groove. When the long section locking groove does not protrude from the surface of the locking bar, the raised structure of the spring sheet is pressed down by the limiting edge, so that the spring sheet is in a pressed state. When the locking pin slides to the left relative to the left short section locking groove, the elastic restoring force of the raised structure of the spring sheet will push the limiting edge, thereby causing the long section locking groove to protrude outward.

[0014] Furthermore, the main body of the puller is a strip-shaped structure with an assembly cavity inside. The locking tongue is slidably installed in the assembly cavity, and a second spring is provided between the locking tongue and the end of the assembly cavity. Under the action of the second spring, the end of the locking tongue can extend from the left end of the main body. A push rod groove is opened on the bottom surface of the main body, and a push rod is installed in the push rod groove. The push rod is connected to the locking tongue. By driving the push rod, the locking tongue can be retracted into the main body.

[0015] Furthermore, the pull-out pressure head has a rounded rectangular structure with a strip groove on its side. The drive shaft passes through the strip groove and is connected to the rotating shaft. The rotating shaft is arranged horizontally through the pull-out pressure head, and the distance A between the rotating shaft and the right side of the pull-out pressure head is less than the distance B between the rotating shaft and the top surface of the pull-out pressure head.

[0016] Further, the connecting hole on the locking pin shaft of the locking device is fixedly connected to the housing of the LRM module, and then the LRM module is inserted into the slot of the LRM chassis. The puller is rotated, and during the rotation of the puller's puller head, the locking pin shaft is driven to move to the left via the drive shaft, compressing the first spring. This movement is transformed into relative sliding between the inclined surfaces of the long section locking groove and the left and right short section locking grooves, causing the long section locking groove to bulge outwards. During this bulging process, the compressed spring plate, under the action of elastic restoring force, will push the long section locking groove. The bulging long section locking groove presses against the side wall of the LRM chassis to restrict the LRM module. Then, the locking tongue is first driven into the body of the puller by the push rod, and then the end of the body is rotated to the side of the LRM chassis partition. The push rod is then released, and the locking tongue pops out of the puller's body and locks against the side of the LRM chassis partition, achieving the purpose of locking the LRM module.

[0017] Compared with the prior art, the present invention has the following technical features:

[0018] This invention is small in size, making more efficient use of limited space; the pull-out aid and locking strip are integrated into one design, and the pull-out aid can be fixed on the LRM chassis partition, making it less likely for the LRM module to fall out due to impact and vibration; the LRM module can be quickly disassembled manually without the need for any tools. Attached Figure Description

[0019] Figure 1 It is a schematic diagram of the top view of the structure of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention after disassembly.

[0022] Figure 4 This is a schematic diagram of the present invention in an unused state (the long section locking groove is not protruding outward);

[0023] Figure 5 This is a schematic diagram of the actual product of the present invention in application (the long section locking groove protrudes outward).

[0024] The following are the labeling details in the diagram: 1. Pull-out aid; 2. Locking bar; 11. Main body; 12. Pull-out pressure head; 13. Locking tongue; 14. Push rod; 15. Rotating shaft; 16. Strip groove; 17. Push rod groove; 18. Mounting hole; 21. Left short section locking groove; 22. Right short section locking groove; 23. Long section locking groove; 24. Locking pin; 25. First spring; 26. Drive shaft; 27. Limiting edge; 28. Spring plate; 29. ​​Connecting hole; 210. Locking screw. Detailed implementation method.

[0025] See appendix Figure 1 and Figure 2 This invention provides an integrated locking device for an LRM module, comprising a locking bar 2 and a pull-out aid 1, wherein:

[0026] 1. Locking strip 2

[0027] The locking bar 2 has a three-section structure, consisting of a left short section locking groove 21, a long section locking groove 23, and a right short section locking groove 22, which are sequentially fitted together at an angle. Initially, all three are aligned on a single axis. A locking pin 24 is installed within the locking bar 2. The right end of the locking pin 24 is fixed in the right short section locking groove 22, while the remaining portion is fitted in the long section locking groove 23 and the left short section locking groove 21. The locking pin 24 can slide axially relative to the left short section locking groove 21. The long section locking groove 23 and the locking pin 24 are in a sliding fit. The locking pin 24 is designed to allow the long locking groove 23 to protrude from the surface of the locking bar 2. A spring groove is provided in the middle of the locking pin 24, in which a spring plate 28 is fitted. The two ends of the spring plate 28 are supported at the two ends of the spring groove, and the spring plate 28 cooperates with the long locking groove 23. A drive shaft 26 is provided at the left end of the locking pin 24. A first spring 25 is fitted on the drive shaft 26. The two ends of the first spring 25 are supported at the left end of the locking pin 24 and the end of the left short locking groove 21, respectively. A connecting hole 29 is provided on the locking pin 24.

[0028] See appendix Figure 1 In this design, the locking strip 2 has a rectangular groove structure with a concave cross-section. It consists of three sections: a left short section locking groove 21, a long section locking groove 23, and a right short section locking groove 22. The length of the long section locking groove 23 is greater than the other two locking grooves. The left end of the left short section locking groove 21 and the right end of the right short section locking groove 22 are flat, while the right end of the left short section locking groove 21, the left end of the right short section locking groove 22, and both ends of the long section locking groove 23 are inclined surfaces, for example, at a 45° angle. In this way, the long section locking groove 23 can slide relative to the left short section locking groove 21 and the right short section locking groove 22, protruding from the surface of the locking strip 2.

[0029] The locking pin 24 is an integral structure. The lower end of the locking pin 24 is provided with a limiting slider, so that the cross-section of the locking pin 24 is T-shaped. The long section locking groove 23 of the locking bar 2 is provided with a limiting edge 27 inside the groove. When the long section locking groove 23 slides relative to the locking pin 24 until the limiting slider contacts the limiting edge 27, it cannot continue to slide, thereby limiting the outward protrusion range of the long section locking groove 23 and preventing the long section locking groove 23 from slipping out of the locking bar 2.

[0030] During actual installation, after inserting the locking pin 24 into the locking strip 2, the locking screw 210 is screwed into the right short section locking groove 22 and the locking hole at the right end of the locking pin 24 to fix the locking pin 24 to the right short section locking groove 22.

[0031] The spring plate 28 has an arched or other shaped raised structure in the middle. In its natural state, the spring plate 28 can be an arched structure or a cap-shaped structure. Both ends of the spring plate 28 are supported in the spring groove, and the spring plate 28 cooperates with the limiting edge 27 of the long section locking groove 23. When in... Figure 1 In the state shown, that is, when the long section locking groove 23 does not protrude from the surface of the locking bar 2, the raised structure of the spring plate 28 is pressed down by the limiting edge 27, so that the spring plate 28 is in a pressed state as a whole; when the locking pin 24 slides to the left relative to the left short section locking groove 21, under the elastic restoring force of the raised structure of the spring plate 28, it will push the limiting edge 27, thereby causing the long section locking groove 23 to protrude outward, which plays a role in assisting the long section locking groove 23 to protrude outward.

[0032] The locking pin 24 has connecting holes 29 on its left and right sides for connecting to the housing of the LRM module to be locked.

[0033] 2. Pull-out aid 1

[0034] The pull-out aid 1 has an L-shaped structure, including a main body 11 and a pull-out pressure head 12 located at the right end of the main body 11. A locking tongue 13 is elastically fitted in the main body 11. The locking tongue 13 can extend from the left end of the main body 11 or retract into the main body 11. A push rod 14 linked with the locking tongue 13 is provided on the side of the main body 11. A rotating shaft 15 connected to the end of the drive shaft 26 is provided in the pull-out pressure head 12. During the rotation of the pull-out aid 1, the drive shaft 26 drives the locking pin 24 to move to the left, causing the first spring 25 to be compressed. With the assistance of the spring plate 28, the long section locking groove 23 protrudes from the surface of the locking strip 2.

[0035] The main body 11 of the pull-out aid 1 is a strip-shaped structure with an internal assembly cavity. The locking tongue 13 is slidably installed in the assembly cavity, and a second spring is provided between the locking tongue 13 and the end of the assembly cavity. Under the action of the second spring, the end of the locking tongue 13 can extend from the left end of the main body 11. A push rod groove 17 is opened on the bottom surface of the main body 11, and a push rod 14 is installed in the push rod groove 17. The push rod 14 is connected to the locking tongue 13. By driving the push rod 14, the locking tongue 13 can be retracted into the main body 11. See also Figure 1 To facilitate the installation of the locking tongue 13 and the push rod 14, an installation hole 18 is provided on the top surface of the main body 11. After the locking tongue 13 is inserted into the assembly cavity by the second spring, the locking tongue 13 is connected to the push rod 14 at the bottom by screws to achieve its installation and fixation.

[0036] The pull-out pressure head 12 has a rounded rectangular structure with a strip groove 16 on its side. The drive shaft 26 passes through the strip groove 16 and is connected to the rotating shaft 15. The rotating shaft 15 is arranged transversely through the pull-out pressure head 12. (See attached image) Figure 1 The distance A between the rotating shaft 15 and the right side of the lifting head 12 is less than the distance B between the rotating shaft 15 and the top surface of the lifting head 12. This ensures that when the lifting device 1 rotates as a whole...

[0037] The surface of the pull-out pressure head 12 that contacts the left short section locking groove 21 transitions from the right side of the pull-out pressure head 12 to the top surface of the pull-out pressure head 12 through a rounded corner. During this process, since the position of the rotating shaft 15 has shifted to the left, the locking pin shaft 24 will be moved to the left as a whole through the drive shaft 26.

[0038] 3. The working process of this invention is as follows:

[0039] Locking device in its initial state Figure 1 , Figure 2 , Figure 4 As shown, at this time, the main body 11 of the puller 1 is not rotating, and the left short section locking groove 21, the long section locking groove 23 and the right short section locking groove 22 are on the same axis, and the long section locking groove 23 does not protrude outward.

[0040] The connecting hole 29 on the locking pin 24 in the locking device is fixedly connected to the housing of the LRM module, and then the LRM module is inserted into the slot of the LRM chassis; the puller 1 is rotated, and during the rotation of the puller head 12 of the puller 1, the locking pin 24 will be driven to move to the left through the drive shaft 26, and the first spring 25 is compressed; since the locking pin 24 is fixed on the housing of the LRM module, the movement process will be transformed into the relative sliding of the inclined surfaces between the long section locking groove 23 and the left short section locking groove 21 and the right short section locking groove 22, so that the long section locking groove 23 protrudes outward; the protrusion exceeds During the process, the compressed spring plate 28, under the action of elastic restoring force, will push the long-section locking groove 23, playing an auxiliary role; the protruding long-section locking groove 23 abuts against the side wall of the LRM chassis to restrict the LRM module; then, the push rod 14 first drives the locking tongue 13 into the body 11 of the puller 1, and then rotates the end of the body 11 to the side of the LRM chassis partition, and releases the push rod 14. The locking tongue 13 pops out of the body 11 of the puller 1 and locks into the side of the LRM chassis partition, achieving the purpose of locking the LRM module. The final use state of the locker is as follows. Figure 5 As shown.

[0041] When disassembling the LRM module, first pull the push rod 14 to retract the locking tongue 13 back into the main body 11, then rotate the main body 11 of the puller 1 to extend the first spring 25, drive the long section locking groove 23 to reset, compress the spring plate 28, and finally return to the initial state before removing the puller 1.

[0042] The above design allows for the quick disassembly of the LRM module. Compared with the original locking strip 2 design, this invention has the advantages of small size, good fixing effect, and the ability to quickly disassemble the LRM module manually.

[0043] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An integrated locking device for an LRM module, characterized in that, Includes a locking bar (2) and a puller (1), wherein: The locking bar (2) has a three-section structure, consisting of a left short section locking groove (21), a long section locking groove (23), and a right short section locking groove (22) that fit together in a series of inclined surfaces. A locking pin (24) is installed inside the locking bar (2). The right end of the locking pin (24) is fixed in the right short section locking groove (22), and the rest is installed in the long section locking groove (23) and the left short section locking groove (21). The locking pin (24) can slide axially relative to the left short section locking groove (21). The long section locking groove (23) and the locking pin (24) are in a sliding fit. This allows the long section locking groove (23) to protrude from the surface of the locking bar (2); a spring groove is provided in the middle of the locking pin (24), in which a spring plate (28) is fitted, and the spring plate (28) cooperates with the long section locking groove (23); a drive shaft (26) is provided at the left end of the locking pin (24), and a first spring (25) is fitted on the drive shaft (26), with the two ends of the first spring (25) respectively supported on the left end of the locking pin (24) and the end of the left short section locking groove (21); a connecting hole (29) is provided on the locking pin (24); The pull-out aid (1) includes a main body (11) and a pull-out pressure head (12) located at the right end of the main body (11); a locking tongue (13) is elastically fitted in the main body (11), and the locking tongue (13) can extend from the left end of the main body (11) or retract into the main body (11); a push rod (14) linked with the locking tongue (13) is provided on the side of the main body (11); a rotating shaft (15) connected to the end of the drive shaft (26) is provided in the pull-out pressure head (12); during the rotation of the pull-out aid (1), the locking pin (24) is driven to move to the left by the drive shaft (26) so that the first spring (25) is compressed; with the assistance of the spring plate (28), the long section locking groove (23) protrudes from the surface of the locking bar (2); The locking pin (24) is an integral structure. The lower end of the locking pin (24) is provided with a limiting slider, so that the cross-section of the locking pin (24) is T-shaped. The long section locking groove (23) of the locking bar (2) is provided with a limiting edge (27) inside the groove. When the long section locking groove (23) slides relative to the locking pin (24) until the limiting slider contacts the limiting edge (27), it cannot continue to slide. The spring plate (28) has a raised structure in the middle. Both ends of the spring plate (28) are supported in the spring groove. The spring plate (28) cooperates with the limiting edge (27) of the long section locking groove (23). When the long section locking groove (23) does not protrude from the surface of the locking bar (2), the raised structure of the spring plate (28) is pressed down by the limiting edge (27), so that the spring plate (28) is in a pressed state. When the locking pin (24) slides to the left relative to the left short section locking groove (21), under the elastic restoring force of the raised structure of the spring plate (28) pressing down, it will push the limiting edge (27) and thus drive the long section locking groove (23) to protrude outward.

2. The integrated locking device of the LRM module according to claim 1, characterized in that, The locking bar (2) is a rectangular groove structure with a "U" shaped cross section. The length of the long locking groove (23) is greater than the other two locking grooves.

3. The integrated locking device of the LRM module according to claim 1, characterized in that, After inserting the locking pin (24) into the locking strip (2), use the locking screw (210) to screw into the right short section locking groove (22) and the locking hole at the right end of the locking pin (24) to fix the locking pin (24) to the right short section locking groove (22).

4. The integrated locking device of the LRM module according to claim 1, characterized in that, The main body (11) of the puller (1) is a strip structure with an assembly cavity inside. The locking tongue (13) is slidably installed in the assembly cavity, and a second spring is provided between the locking tongue (13) and the end of the assembly cavity. Under the action of the second spring, the end of the locking tongue (13) can extend from the left end of the main body (11). A push rod groove (17) is opened on the bottom surface of the main body (11), and a push rod (14) is installed in the push rod groove (17). The push rod (14) is connected to the locking tongue (13). By driving the push rod (14), the locking tongue (13) can be retracted into the main body (11).

5. The integrated locking device of the LRM module according to claim 1, characterized in that, The pull-out pressure head (12) is a rounded rectangular structure with a strip groove (16) on its side. The drive shaft (26) passes through the strip groove (16) and is connected to the rotating shaft (15). The rotating shaft (15) is arranged horizontally through the pull-out pressure head (12). The distance A between the rotating shaft (15) and the right side of the pull-out pressure head (12) is less than the distance B between the rotating shaft (15) and the top surface of the pull-out pressure head (12).

6. The integrated locking device of the LRM module according to claim 1, characterized in that, The connecting hole (29) on the locking pin (24) in the locking device is fixedly connected to the housing of the LRM module, and then the LRM module is inserted into the slot of the LRM chassis; the puller (1) is rotated, and during the rotation of the puller head (12) of the puller (1), the locking pin (24) will be driven to move to the left through the drive shaft (26), and the first spring (25) will be compressed; the movement process will be transformed into the relative sliding of the inclined surfaces between the long section locking groove (23) and the left short section locking groove (21) and the right short section locking groove (22), so that the long section locking groove (23) protrudes outward; during the protrusion process, The compressed spring plate (28) will push the long section locking groove (23) under the action of elastic restoring force; the protruding long section locking groove (23) abuts against the side wall of the LRM chassis to restrict the LRM module; then, the locking tongue (13) is driven into the body (11) of the puller (1) by the push rod (14), and then the end of the body (11) is rotated to the side of the LRM chassis partition. After releasing the push rod (14), the locking tongue (13) pops out of the body (11) of the puller (1) and is locked on the side of the LRM chassis partition to achieve the purpose of locking the LRM module.

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