A device and method for quickly locking and dismounting a cover plate of an avionics chassis

Abstract

The application relates to the technical field of avionics chassis, and particularly discloses a device and a method for quickly locking and disassembling a cover plate of an avionics chassis, which are used for assembling and disassembling the chassis and the cover plate; the device is characterized in that a plurality of groups of elastic screwing pieces are arranged on the cover plate, and a plurality of groups of pin shaft pieces are arranged on the chassis and correspond to the screwing pieces one by one; the side of the chassis close to the cover plate is provided with a plurality of groups of insertion holes corresponding to the pin shaft pieces, the pin shaft pieces are located in the insertion holes, the screwing pieces are provided with spiral grooves, the screwing pieces are inserted into the insertion holes, and the spiral grooves are in clamping cooperation with the pin shaft pieces. Through cooperation of the screwing pieces and the pin shaft pieces, the chassis and the cover plate can be quickly locked or disassembled without using tools, the structure is simple, and the device is practical.

Description

Technical Field

[0001] This invention relates to the field of avionics enclosure technology, and more specifically, to a device and method for quickly locking and removing the cover of an avionics enclosure. Background Technology

[0002] With the development of electronic technology, avionics equipment is increasingly moving towards integrated modularity, and replaceable modular electronic enclosures are widely used in avionics, communications, radar, and other fields. According to GJB / Z 457-2006 "General Design Guidelines for Airborne Electronic Equipment," airborne electronic equipment should adopt the "three-fold" design principle of "generalization, serialization, and modularization"; electromagnetic compatibility requires the enclosure to have shielding performance; and maintainability requires repair time to be as short as possible. For enclosed modular enclosures, the ability to quickly remove the cover, replace internal modules, and then quickly reinstall the cover has become a new requirement.

[0003] Traditionally, the cover plate is connected to the chassis using screws, which are screwed through the cover plate into the threaded holes in the chassis. Screws generally come in various types, such as Phillips head, slotted head, internal hexagon, and external hexagon, requiring corresponding installation tools. Disassembly and reassembly are time-consuming, and the screw installation method can no longer meet the needs of rapid assembly and disassembly. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device and method for quickly locking and removing the cover of an avionics chassis. Through the cooperation of the screwing component and the pin component, the chassis and the cover can be quickly locked or removed without the use of tools. The structure is simple and highly practical. The solution adopted by this invention to solve the technical problem is: on the one hand: This invention provides a device for quickly locking and removing the cover of an avionics chassis, used for installing and removing the chassis and the cover; it includes multiple sets of flexible screwing parts installed on the cover and pins installed on the chassis and corresponding to the screwing parts one by one; On the side of the chassis near the cover plate, there are corresponding insertion holes for the pins. The pins are located inside the insertion holes. The screwing component has a spiral groove. The screwing component extends into the insertion hole and the spiral groove engages with the pin.

[0005] In some possible implementations, in order to effectively achieve the locking of the chassis and the cover by means of a screwing component to achieve a snap-fit ​​engagement with the pin, the screwing component includes a locking sleeve mounted on the cover, a butterfly screw rod coaxially fitted inside the locking sleeve, and an elastic element fitted outside the butterfly screw rod and located inside the locking sleeve; the spiral groove is provided on the side of the butterfly screw rod near the pin; the spiral groove passes through the locking sleeve and engages with the pin.

[0006] In some possible implementations, in order to effectively achieve the engagement between the spiral groove and the pin, the spiral groove includes a grooved section with a slot, a guide section communicating with the grooved section and used to guide the pin, and a locking groove communicating with the guide section and used to lock the wing-shaped spiral rod and the pin.

[0007] In some possible implementations, in order to effectively allow the pin to enter the locking groove through the slotted section, the guide section is a 90° spiral section.

[0008] In some possible implementations, the guide section includes a section one that communicates with one side of the slot section and one side of the locking groove, and a section two that communicates with the other side of the slot section and the locking groove, as well as with section one; the spiral directions of section one and section two are opposite.

[0009] In some possible implementations, the slot is located at one end of the butterfly-shaped spiral rod near the pin and extends radially through the butterfly-shaped spiral rod; The locking groove extends radially through the butterfly-shaped spiral rod and is perpendicular to the axial direction of the groove opening section.

[0010] In some possible implementations, the butterfly screw includes a butterfly handle located outside the lock sleeve, a rod body connected to the butterfly handle, and a limiting boss disposed on the rod body and located inside the lock sleeve; the spiral groove is disposed on the side of the rod body away from the butterfly handle.

[0011] In some possible implementations, the locking sleeve is provided with a through hole through which the rod body passes; the elastic element is fitted on the outside of the rod body and is located on the side of the limiting boss away from the butterfly handle.

[0012] In some possible implementations, the pin includes an optical shaft and threaded sections at both ends of the optical shaft; the housing is provided with an internal threaded hole that is screwed into the threaded sections and communicates with the insertion hole.

[0013] on the other hand: This invention provides a method for quickly locking and removing a cover plate of an avionics chassis. Based on the aforementioned device for quickly locking and removing a cover plate of an avionics chassis, the method specifically includes the following steps: When locking the chassis and cover, control the screwing component to move into the insertion hole and make the pin pin position in the spiral groove of the screwing component. Rotate the screwing component clockwise to make the pin pin move along the guide section of the screwing component and finally move into the locking groove of the rotating screwing component to achieve the engagement of the pin pin and the locking groove. When disassembling the chassis and cover, press down on the screw mechanism and simultaneously control the rotation to turn counterclockwise, so that the pin and the screw mechanism's spiral groove separate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention upgrades the traditional installation relationship between the cover plate and the chassis of electronic devices from a threaded connection to an assembly relationship formed by screw-in parts and pins. Compared with the existing technology, which involves screwing in or out screws multiple times, the time required for installing or removing the cover plate is greatly shortened. This invention upgrades the traditional tool-operated spiral lock into a tool-free butterfly handle, making operation simpler and more convenient; This invention simplifies the traditional single-hole or multi-hole lock seat into a pin component, which greatly reduces costs and makes installation easier; In this invention, the screwing component is a separately assembled assembly that can be assembled and fixed to the cover plate with just two screws. In contrast, traditional spiral locks consist of three separate parts: a locking pin, a spring, and a sleeve, which need to be riveted to the cover plate by riveting, closing, or other methods. Subsequent replacement and maintenance of traditional spiral locks are more complicated and difficult. In this invention, the screw-on component and the cover plate form a cover plate assembly, which can be conveniently placed aside after being removed from the aircraft chassis, avoiding the risk of many small loose parts being generated after the traditional screws are removed, which poses a great risk of falling and being difficult to find. The electromagnetic shielding performance of the cover plate assembly locked using the present invention is not significantly different from that of the cover plate assembly installed with screws and the shielding body formed by the chassis. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure when the chassis and cover are connected according to the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 for Figure 1 A partial sectional view; Figure 6 This is a schematic diagram of the screwing component in this invention; Figure 7 This is a cross-sectional view of the screwing component in this invention; Figure 8 This is a schematic diagram of the pin component in this invention; Figure 9 This is a diagram showing the usage state of the screwing component and the pin component of the present invention; in: 1. Tightening parts; 101. Lock case; 102. Butterfly-shaped screw rod; 1021. Spiral groove; 1022. Butterfly handle; 1023. Rod body; 1024. Limiting boss; 103. Elastic components; 2. Pins and shafts; 201, Optical axis; 202, Threaded section; 3. Cover plate; 4. Chassis; 5. Screws. Detailed Implementation

[0016] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] The present invention will now be described in detail.

[0018] like Figures 1-9 As shown: on the one hand: The present invention provides a device for quickly locking and removing the cover plate 3 of an avionics chassis 4, for installing and removing the chassis 4 and the cover plate 3; including multiple sets of elastic screwing parts 1 installed on the cover plate 3, and pins 2 installed on the chassis 4 and corresponding one-to-one with the screwing parts 1. On the side of the chassis 4 near the cover plate 3, there are corresponding insertion holes for the pins 2, and the pins 2 are located in the insertion holes; the screwing part 1 is provided with a spiral groove 1021, the screwing part 1 extends into the insertion hole and the spiral groove 1021 engages with the pins 2.

[0019] Specifically, the screwing part 1 is installed on the cover plate 3 by countersunk screws 5 to form the quick-release cover plate 3 assembly; The pin 2 is installed on the chassis 4 and is set to correspond to the socket. The screwing part 1 is set in multiple sets, one-to-one with the pin 2. When the chassis 4 and the cover plate 3 are locked, the screwing part 1 needs to be controlled to move towards the pin 2 and rotate clockwise around its direction of movement, so that the pin 2 is located in the spiral groove 1021. With the continuous movement of the screwing part 1, the pin 2 will engage with the other end of the spiral groove 1021, thus locking the chassis 4 and the cover plate 3. At the same time, since the screwing part 1 is elastic, when the screwing part 1 is controlled to move towards the pin 2, the entire screwing part 1 will be in a compressed state. After the pin 2 engages with the spiral groove 1021, no force is applied to the screwing part 1. Under the elastic force, the spiral groove 1021 can tightly lock the pin 2, so that the pin 2 and the screwing part 1 will not reverse or loosen.

[0020] Conversely, when the chassis 4 and the cover plate 3 are disassembled, the control screw 1 is pressed and rotated counterclockwise at the same time, and the pin 2 will be disengaged from the spiral groove 1021, thus separating the spiral groove 1021 from the pin 2. Compared with the prior art, this application uses screws for installation and removal. During installation and removal, no tools are used. The cover plate 3 is quickly screwed in clockwise by hand to lock it onto the chassis 4. When it is necessary to remove the cover plate 3, it can be removed by hand by unscrewing it in the opposite direction, which greatly improves the efficiency.

[0021] In some possible implementations, in order to effectively achieve the locking of the chassis 4 and the cover plate 3 by means of the screwing component 1 to achieve the snap-fit ​​engagement with the pin component 2, the screwing component 1 includes a locking sleeve 101 installed on the cover plate 3, a butterfly-shaped spiral rod 102 coaxially fitted inside the locking sleeve 101, and an elastic element 103 fitted outside the butterfly-shaped spiral rod 102 and located inside the locking sleeve 101; the spiral groove 1021 is provided on the side of the butterfly-shaped spiral rod 102 near the pin component 2; the spiral groove 1021 passes through the locking sleeve 101 and snaps into the pin component 2.

[0022] Preferably, the elastic element 103 is a compression spring.

[0023] In some possible implementations, in order to effectively achieve the engagement between the spiral groove 1021 and the pin 2, the spiral groove 1021 includes a groove section with a slot, a guide section communicating with the groove section and used to guide the pin 2, and a locking groove communicating with the guide section and used to lock the butterfly spiral rod 102 and the pin 2. Specifically, when the screwing part 1 moves toward the pin part 2, the pin part 2 will first enter the groove section. At this time, the elastic part 103 will change from the original state to the compressed state. Then, as the butterfly screw rod 102 rotates clockwise, it enters the locking groove through the guide section, realizing the engagement between the butterfly screw rod 102 and the pin part 2.

[0024] In some possible implementations, in order to effectively allow the pin 2 to enter the locking groove through the slotted section, the guide section is a 90° spiral section.

[0025] In some possible implementations, the guide section includes a section one that communicates with one side of the slot section and one side of the locking groove, and a section two that communicates with the other side of the slot section and the locking groove, as well as with section one; the spiral directions of section one and section two are opposite; with this arrangement, the pin rod can enter the locking groove after passing through the guide section.

[0026] The slot is located at one end of the butterfly-shaped spiral rod 102 near the pin 2 and extends radially through the butterfly-shaped spiral rod 102. When locked, the slot section moves towards the side closer to the pin 2 under the drive of the butterfly-shaped spiral rod 102. The axial direction of the slot section is parallel to the axis of the pin 2 and is on the same plane, so that the pin 2 can enter the slot section. The locking groove extends radially through the butterfly spiral rod 102 and is perpendicular to the axial direction of the groove section. After the pin 2 enters the groove section, the butterfly spiral rod 102 is rotated 90° clockwise, and the pin 2 will enter the locking groove through the guide section.

[0027] In some possible implementations, the butterfly screw rod 102 includes a butterfly handle 1022 located outside the locking sleeve 101, a rod body 1023 connected to the butterfly handle 1022, and a limiting boss 1024 disposed on the rod body 1023 and located inside the locking sleeve 101; the spiral groove 1021 is disposed on the side of the rod body 1023 away from the butterfly handle 1022. With the above settings, the movement and rotation of the butterfly screw rod 102 can be controlled by manually squeezing the handle, without the need for other tools, which greatly improves work efficiency. In some possible implementations, the locking sleeve 101 is provided with a through hole through which the rod body 1023 passes; the elastic element 103 is fitted on the outside of the rod body 1023 and is located on the side of the limiting boss 1024 away from the butterfly handle 1022. The limiting ring provided on the side of the lock sleeve 101 away from the cover plate 3, when the elastic element 103 is in the initial state, the limiting ring contacts and abuts against the limiting boss 1024 to prevent the butterfly spiral rod 102 from separating from the lock sleeve 101. Furthermore, the lock sleeve 101 is provided with an abutting boss, which is located on the side of the elastic member 103 away from the limiting ring.

[0028] In some possible implementations, the pin 2 includes an optical shaft 201 and threaded sections 202 disposed at both ends of the optical shaft 201; the housing 4 is provided with an internal threaded hole that is screwed into the threaded section 202 and communicates with the insertion hole.

[0029] Specifically, one end of a set of threaded sections 202 away from the optical axis 201 is provided with a screw head in the form of a cross or flathead, internal or external hexagon, etc.; the pin 2 is installed by the cooperation of the screw head and the tool. When it is installed on the housing 4, the optical axis 201 will be located in the insertion hole and cooperate with the spiral groove 1021.

[0030] on the other hand: This invention provides a method for quickly locking and removing the cover plate 3 of an avionics chassis 4. Based on the aforementioned device for quickly locking and removing the cover plate 3 of an avionics chassis 4, the method specifically includes the following steps: When locking the chassis 4 and the cover plate 3, control the screwing part 1 to move into the insertion hole, and make the pin 2 located in the spiral groove 1021 of the screwing part 1. Rotate the screwing part 1 clockwise, so that the pin 2 moves along the guide section of the screwing part 1 and finally moves into the locking groove, so as to realize the engagement of the pin 2 with the locking groove. When disassembling the chassis 4 and the cover plate 3, press down on the screw 1 and simultaneously control the rotation to rotate counterclockwise, so that the pin 2 separates from the screw 1.

[0031] This invention upgrades the traditional installation relationship between the cover plate 3 and the chassis 4 of electronic devices from a threaded connection to an assembly relationship formed by a screw-on component 1 and a pin component 2. Compared with the prior art, which involves screwing the screw in or out multiple times, the installation or disassembly time of the cover plate 3 is greatly shortened.

[0032] This invention upgrades the traditional tool-operated spiral lock into a tool-free butterfly handle 1022, making operation simpler and more convenient.

[0033] This invention simplifies the traditional single-hole or multi-hole lock seat into a pin component 2, which greatly reduces costs and makes installation easier.

[0034] In this invention, the screwing component 1 is a separately assembled assembly that can be assembled and fixed to the cover plate 3 with just two screws 5. In contrast, traditional spiral locks consist of three separate parts: a locking pin, a spring, and a sleeve, which need to be riveted to the cover plate 3 by riveting, closing, or other methods. Subsequent replacement and maintenance of traditional spiral locks are more complicated and difficult.

[0035] In this invention, the screw-on part 1 and the cover plate 3 form a detachable cover plate assembly. After being removed from the chassis 4 on the aircraft, it can be conveniently placed to the side, avoiding the risk of many small loose parts being generated after the traditional screws are removed, which poses a great risk of falling and being difficult to find.

[0036] The electromagnetic shielding performance of the cover plate 3 assembly after locking using the present invention is not significantly different from that of the cover plate 3 assembly installed with screws and the shielding body formed by the chassis 4.

[0037] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A device for quickly locking and removing a cover plate of an avionics chassis, used for installing and removing the chassis and cover plate; characterized in that, It includes multiple sets of flexible screwing parts mounted on the cover plate and pins mounted on the chassis and corresponding to the screwing parts; On the side of the chassis near the cover plate, there are corresponding insertion holes for the pins. The pins are located inside the insertion holes. The screwing component has a spiral groove. The screwing component extends into the insertion hole and the spiral groove engages with the pin.

2. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 1, characterized in that, The screwing component includes a locking sleeve mounted on the cover plate, a butterfly-shaped spiral rod coaxially fitted inside the locking sleeve, and an elastic element fitted outside the butterfly-shaped spiral rod and located inside the locking sleeve; the spiral groove is provided on the side of the butterfly-shaped spiral rod near the pin; the spiral groove passes through the locking sleeve and engages with the pin.

3. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 2, characterized in that, The spiral groove includes a grooved section with a slot, a guide section connected to the grooved section and used to guide the pin, and a locking groove connected to the guide section and used to lock the butterfly spiral rod and the pin.

4. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 3, characterized in that, The guide section is a 90° spiral section.

5. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 3, characterized in that, The guide section includes section one, which is connected to one side of the slot section and one side of the locking groove, and section two, which is connected to the other side of the slot section and the locking groove, and section one respectively; the spiral directions of section one and section two are opposite.

6. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 4, characterized in that, The slot is located at one end of the butterfly-shaped spiral rod near the pin and extends radially through the butterfly-shaped spiral rod. The locking groove extends radially through the butterfly-shaped spiral rod and is perpendicular to the axial direction of the groove opening section.

7. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 2, characterized in that, The butterfly-shaped spiral rod includes a butterfly handle located outside the lock sleeve, a rod body connected to the butterfly handle, and a limiting boss disposed on the rod body and located inside the lock sleeve; the spiral groove is disposed on the side of the rod body away from the butterfly handle.

8. The device for quickly locking and removing the cover plate of an avionics chassis according to claim 3, characterized in that, The locking sleeve is provided with a through hole for the rod body to pass through; the elastic element is fitted on the outside of the rod body and is located on the side of the limiting boss away from the butterfly handle.

9. A device for quickly locking and removing a cover plate of an avionics enclosure according to any one of claims 1-8, characterized in that, The pin component includes a light shaft and threaded sections at both ends of the light shaft; the chassis is provided with an internal threaded hole that is screwed into the threaded section and communicates with the insertion hole.

10. A method for quickly locking and removing a cover plate of an avionics enclosure, characterized in that, The device for quickly locking and removing the cover of an avionics enclosure according to any one of claims 1-9 specifically includes the following steps: When locking the chassis and cover, control the screwing component to move into the insertion hole and make the pin pin position in the spiral groove of the screwing component. Rotate the screwing component clockwise to make the pin pin move along the guide section of the screwing component and finally move into the locking groove of the rotating screwing component to achieve the engagement of the pin pin and the locking groove. When disassembling the chassis and cover, press down on the screw mechanism and simultaneously control the rotation to turn counterclockwise, so that the pin and the screw mechanism's spiral groove separate.

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