Multi-angle automatic testing equipment and method for the locking strength of aviation oxygen mask latches

Abstract

The present invention relates to a multi-angle automatic testing device and method for the locking strength of the latch of an aviation oxygen supply mask, comprising a lower moving seat and an upper moving seat, wherein the upper moving seat is fixedly connected with a fixed frame, and the lower moving seat is provided with a lifting frame that can be lifted up and down, and the fixed frame and the lifting frame are respectively provided with a plurality of limit locking structures that enable the corresponding turntable 1 and turntable 2 to achieve longitudinal limit, the fixed frame is provided with an upper automatic sliding block connected to one end of a rope body on the latch seat, the lifting frame is provided with a lower automatic sliding block connected to one end of a rope body on the latch body, the turntable 2 is provided with a driving structure for squeezing two squeezing blocks on the latch body, and a lifting electric cylinder is provided between the lifting frame and the lower moving seat. The present invention has the following advantages: ensuring the plug-in verticality when the latch body and the latch seat are locked and matched, and avoiding wear on the latch during the plug-in and matching process; by realizing multi-angle force application on the latch after locking and matching, the high standard testing requirements for the latch on the aviation oxygen supply mask are achieved.

Description

Technical Field

[0001] The invention belongs to the field of aviation oxygen supply masks, and in particular relates to a multi-angle automatic testing device and method for the locking strength of a latch of an aviation oxygen supply mask. Background Art

[0002] The aviation oxygen mask is a protective device for pilots. It is used most frequently during actual flight. Its protective performance plays an extremely important role in ensuring oxygen supply and life-saving for pilots during high-altitude flight. The aviation oxygen mask is fixed to the pilot's head through a latch. The latch includes a latch body and a latch seat. The latch body and the latch seat are fixed to the oxygen mask through a rope body. When in use, press the extrusion blocks on both sides of the latch body, the locking teeth on the head of the latch body retract, and the latch body is inserted into the slot of the latch seat to cancel the extrusion of the extrusion block. The locking teeth of the latch body cooperate with the locking strip on the inner wall of the slot, and the locking teeth of the latch body cooperate with the locking strip of the latch seat to achieve the locking and fixing of the latch. Therefore, the locking strength between the latch body and the latch seat is related to the service life of the latch and the safety performance of the aviation oxygen mask.

[0003] When testing the locking strength of the bolt, the bolt body and the bolt seat need to be locked together first, and then the bolt body and the bolt seat are pulled by two opposite external forces. The operator needs to first press the extrusion blocks on both sides of the bolt body to retract the two locking teeth on the head of the bolt body to facilitate the insertion of the bolt body into the slot of the bolt seat, and then cancel the pressure on the extrusion blocks, and the locking teeth expand outward to cooperate with the locking strip in the slot. Finally, the rope body on the bolt body and the rope body on the bolt seat are pulled outward respectively, and the test of the bolt locking strength is completed by observing whether there are wear and cracks on the surface and inside of the bolt. Due to the special structure of the latch on the aviation oxygen mask, pressing the extrusion block on the small-volume latch body requires a relatively delicate action. Currently, the latch and the latch seat can only be matched by manually pressing the latch seat, and then the matched latch and the latch seat are pulled by manpower or equipment to test their locking strength. However, this detection method has the following technical defects: 1. When the latch body and the latch seat are matched manually, the force stability is poor, the verticality of the plug-in cannot be guaranteed, and the locking teeth and the locking strip are worn. Moreover, it is impossible to automatically realize pressing, testing and disassembly, and the automation level is low; 2. When the latch body and the latch seat are pulled by the opposite force, the force direction and force application position of the latch body and the latch seat are always coaxial, and the force direction and angle are single. The aviation oxygen mask is used in extreme environments, and the test environment with a single force direction and angle cannot meet the testing requirements of the latch on the aviation oxygen mask. Therefore, it is necessary to propose a locking strength testing device and a testing method for aviation oxygen supply masks, which can simultaneously realize automatic plug-in matching, vertical locking strength testing and multi-angle locking strength testing, and improve the level of automated testing and testing accuracy. Summary of the invention

[0004] The purpose of the present invention is to overcome the above shortcomings and provide a multi-angle automatic testing device and method for the locking strength of the aircraft oxygen supply mask pin, which can simultaneously realize automatic plug-in matching, vertical locking strength test and multi-angle locking strength test, improve the level of automated testing and test accuracy, ensure the plug-in verticality of the pin body and the pin seat when they are locked together, and avoid wear on the pin during the plug-in matching process; by realizing multi-angle force application on the pin after locking, the high-standard testing requirements for the pin on the aircraft oxygen supply mask are met.

[0005] The object of the present invention is achieved through the following technical solutions: a multi-angle automatic testing device and method for the locking strength of an aviation oxygen supply mask latch, wherein the oxygen supply mask latch comprises a latch body and a latch seat, the latch body and the latch seat are locked and matched, the latch body and the latch seat are fixedly connected to the oxygen supply mask through a rope body, the latch body comprises a latch body, locking teeth arranged on both sides of the latch body head, and two extrusion blocks for expanding or contracting the two locking teeth, the two extrusion blocks are arranged on both sides of the latch body, the latch seat comprises a latch seat body and a slot arranged in the latch seat body, the inner wall of the slot has locking strips on both sides that match the locking teeth of the latch body,

[0006] The invention comprises a lower movable seat connected to the latch body and an upper movable seat connected to the latch seat, the lower movable seat and the upper movable seat move horizontally back and forth, the upper movable seat is fixedly connected to a fixed frame, the lower movable seat is provided with a lifting frame that can be lifted up and down, the fixed frame is provided with a turntable 1, the lifting frame is provided with a turntable 2, the fixed frame and the lifting frame are respectively provided with a plurality of limit locking structures that enable the corresponding turntable 1 and turntable 2 to realize longitudinal limit, the turntable 1 is provided with a card slot 1 for limiting and fixing the latch seat, the fixed frame The upper part is provided with an upper automatic sliding block connected with one end of the rope body on the bolt seat, and the upper automatic sliding block slides freely horizontally on the fixed frame under external force, and the lifting frame is provided with a second card slot for limiting and fixing the bolt body, and the lifting frame is provided with a lower automatic sliding block connected with one end of the rope body on the bolt body, and the lower automatic sliding block slides freely horizontally on the lifting seat of the fixed frame under external force, and the second turntable is provided with a driving structure for squeezing the two squeezing blocks on the bolt body, and a lifting electric cylinder is provided between the lifting frame and the lower moving seat;

[0007] The latch seat and the latch body are limited and fixed in the corresponding card slot 1 and card slot 2, and the limit locking structure longitudinally limits the turntable 1 and turntable 2, so that the latch seat and the latch body are aligned up and down, and the driving structure squeezes the two extrusion blocks on the latch body to make the two locking teeth on the head of the latch body shrink inward, and the jacking electric cylinder is started to drive the jacking frame to move upward, so that the head of the latch body extends into the slot of the latch seat. When the driving structure cancels the squeezing of the two extrusion blocks on the latch body, the locking teeth on the head of the latch body expand outward and lock with the inner wall of the slot. The stop strip cooperates to complete the locking cooperation between the latch body and the latch seat. At this time, the limit locking structure cancels the longitudinal limit of turntable one and turntable two, and the upper moving seat and the lower moving seat move back to back. At this time, turntable one and turntable two can freely adjust the rotation angle with the movement of the upper moving seat and the lower moving seat, and the upper automatic sliding block and the lower automatic sliding block can freely adjust the sliding position with the movement of the upper moving seat and the lower moving seat, thereby generating outward pulling force on the rope body on the latch seat and the rope body on the latch body, respectively, to complete the locking strength test of the oxygen supply mask latch.

[0008] A further improvement of the present invention is that the limit locking structure includes a plurality of equally spaced circumferentially distributed shaft rods arranged on turntable one or turntable two, and also includes a plurality of limit platforms arranged on a fixed frame or a lifting frame, the plurality of limit platforms and the plurality of shaft rods are arranged in sequence and cooperate with each other, and the fixed frame or the lifting frame is provided with an electric push rod for horizontally reciprocatingly pushing the limit platform, when the electric push rod pushes the limit platform to cooperate with the corresponding shaft rod, turntable one or turntable two is in a locked state, and when the electric push rod pushes the limit platform to separate from the corresponding shaft rod, turntable one or turntable two is in an active state.

[0009] A further improvement of the present invention is that turntable 1 and turntable 2 are embedded in corresponding fixed frames and lifting frames, the fixed frame is provided with an inlay hole 1 for facilitating the rotation of turntable 1, the length of the inlay hole 1 in the horizontal direction is greater than the diameter of turntable 1, the outer wall of turntable 1 and the inner wall of the inlay hole 1 are mutually embedded, the lifting frame is provided with an inlay hole 2 for facilitating the rotation of turntable 2, the length of the inlay hole 2 in the horizontal direction is greater than the diameter of turntable 2, and the outer wall of turntable 2 and the inner wall of the inlay hole 2 are mutually embedded.

[0010] A further improvement of the present invention is that the driving structure includes a pushing block distributed on the outside of the extrusion block, the pushing block is reciprocated along the extension direction of the latch body through the driving group, there is a gap between the pushing block and the extrusion block, the side wall of the pushing block close to the extrusion block has a protrusion that matches the end face of the extrusion block, when the protrusion of the pushing block moves to the corresponding extrusion block, the extrusion block is squeezed inward by the protrusion and contracts.

[0011] A further improvement of the present invention is that the driving group includes a rack portion arranged on the end surface of the pushing block away from the extrusion block, the extension direction of the rack portion is consistent with the extension direction of the latch body, the rack portion is placed on the outer side of the turntable 2, and the jacking frame is provided with a driving motor. The driving end of the driving motor is sleeved with a gear, and the gear cooperates with the rack portion. The gear rotates as the driving motor is started and meshes with the rack portion, thereby driving the pushing block to move reciprocatingly up and down.

[0012] A further improvement of the present invention is that a guide column vertically extends from the lower moving seat toward the pushing block, and the guide column vertically penetrates the pushing block. The pushing block reciprocates up and down on the corresponding guide column with the meshing transmission of the gear and the rack part, and there is a gap between the end face of the pushing block and the turntable to facilitate the embedding of the limit locking structure.

[0013] A further improvement of the present invention is that both the upper automatic sliding block and the lower automatic sliding block are provided with pressure sensors in contact with the rope body.

[0014] A further improvement of the present invention is that: the first card slot has a first magnetic attraction layer for adsorbing and fixing the latch seat, and the second card slot has a second magnetic attraction layer for adsorbing and fixing the latch body.

[0015] A multi-angle automatic testing device and method for the locking strength of an aviation oxygen mask latch, the specific steps comprising:

[0016] S1. Position and fix the latch seat containing the rope body in the first slot of the fixing frame, and fix the end of the rope body on the latch seat to the upper automatic sliding block; position and fix the latch body containing the rope body in the second slot of the lifting frame, and fix the end of the rope body on the latch body to the lower automatic sliding block;

[0017] S2, the limit locking structure on the fixed frame and the lifting frame is started, and the electric push rod pushes the limit table to move toward the shaft rod of the turntable 1 or the turntable 2, so that the shaft rods on both sides of the turntable 1 or the turntable 2 respectively contact with the corresponding limit table, realizing the vertical limit of the turntable 1 and the turntable 2, ensuring that the bolt seat corresponds to the bolt body up and down;

[0018] S3, the driving motor on the jacking frame rotates forward, so that the gear and the rack part are meshed and transmitted, thereby driving the push block to move along the extension direction of the bolt body. When the protrusion on the inner side of the push block passes through the squeezing block of the bolt body, the two squeezing blocks are squeezed inward by the inward squeezing force of the protrusion, so that the locking teeth on the head of the bolt body are contracted inward, which facilitates the subsequent extension of the bolt body into the bolt seat, and the driving motor stops starting;

[0019] S4, the lifting electric cylinder drives the lifting frame to move upward, so that the bolt body extends into the bolt seat for a predetermined stroke distance, and then the driving motor rotates in the opposite direction. When the protrusion on the pushing block is separated from the extrusion block on the bolt body, the extrusion blocks on both sides of the bolt body pop outward, so that the locking teeth on both sides of the bolt body pop outward and contact with the locking strips in the bolt seat, thereby completing the locking of the bolt body and the bolt seat;

[0020] S5. The electric push rod of the upper limit locking structure on the fixed frame and the jacking frame retracts and resets, canceling the limit of turntable one and turntable two, and the upper moving seat and the lower moving seat move back to each other. At this time, turntable one and turntable two can freely adjust the rotation angle with the movement of the upper moving seat and the lower moving seat, and the upper automatic sliding block and the lower automatic sliding block can freely adjust the sliding position with the movement of the upper moving seat and the lower moving seat, thereby generating outward pulling force on the rope body on the latch seat and the rope body on the latch body respectively. The pressure sensor detects the pressure value of the rope body in real time. When the pressure value reaches the value preset by the system, the upper moving seat and the lower moving seat stop moving for 10-20s, and then the upper moving seat and the lower moving seat move in the opposite direction for the same distance and then stop moving for 20-30s, unloading the latch body and the latch seat, and completing the locking strength test of the oxygen supply mask latch. If there is no wear and cracks on the surface and inside of the latch body and the latch seat, the locking strength of the oxygen supply mask latch meets the standard.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. When the present invention performs a locking strength test on the latch of the aviation oxygen supply mask, the latch seat and the latch body are first aligned up and down, and the verticality of the latch body and the latch seat during the plugging process is achieved through the mutual cooperation of the driving structure, the limit locking structure and the jacking electric cylinder. Then, the upper moving seat and the lower moving seat move backwards, so that the latch after the locking is subjected to horizontal backward pulling forces in the up and down directions, and the latch after the locking is subjected to multi-angle forces, and automatic plug-in matching, vertical locking strength test, multi-angle locking strength test and automatic restoration and resetting after the test are simultaneously achieved, thereby improving the level of automated testing and the test accuracy, and meeting the high-standard testing requirements for the latch on the aviation oxygen supply mask.

[0023] 2. When the latch seat and the latch body are plugged in, the limit locking structure limits and fixes the turntable 1 and the fixed frame, the turntable 2 and the lifting frame. When the latch seat and the latch body complete the locking fit, the limit locking structure cancels the fixation between the turntable 1 and the fixed frame, the turntable 2 and the lifting frame. During the back-to-back movement of the upper movable seat and the lower movable seat, the latch body and the latch seat are subjected to horizontal back-to-back pulling forces in the up and down directions, and the rotation angles of the turntable 1 and the turntable 2 and the sliding positions of the upper automatic sliding block and the lower automatic sliding block can be freely adjusted. Therefore, the setting of the limit locking structure realizes the plug-in fit of the latch and the automation level of multi-angle force application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a schematic structural diagram of a multi-angle automatic testing device and method for the locking strength of an aviation oxygen mask latch.

[0025] Figure 2 for Figure 1 Schematic diagram of the connection between the middle latch body, the lower moving seat and the lifting frame.

[0026] Figure 3 for Figure 1 Schematic diagram of the connection between the middle latch seat, the upper movable seat and the fixed frame.

[0027] Figure 4 for Figure 1 Schematic diagram of the structure after the middle latch body and the latch seat are matched.

[0028] Figure 5 It is a schematic diagram of the structure after the upper moving seat and the lower moving seat move in opposite directions in step S5.

[0029] Figure 6 It is a schematic diagram of the structure after the upper moving seat and the lower moving seat move in the opposite direction in step S5.

[0030] Numbers in the figure:

[0031] 1-rope body, 2-latch seat, 3-latch body, 4-lower moving seat, 5-upper moving seat, 6-fixed frame, 7-lifting frame, 8-limiting locking structure, 9-driving structure, 10-turntable 1, 11-turntable 2, 12-upper automatic sliding block, 13-lower automatic sliding block, 14-lifting electric cylinder, 15-slot 1, 16-slot 2;

[0032] 21-latch seat, 22-slot, 23-locking strip;

[0033] 31-bolt body, 32-locking tooth, 33-extrusion block;

[0034] 81-shaft rod, 82-limiting platform, 83-electric push rod;

[0035] 91 - pushing block, 92 - protruding portion, 93 - rack portion, 94 - driving motor, 95 - gear, 96 - guide column. DETAILED DESCRIPTION

[0036] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0037] In the description of the present invention, it is necessary to understand that terms indicating orientation or positional relationships, such as orientation or positional relationships based on the drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure or unit referred to must have a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0038] In the present invention, unless otherwise clearly stipulated and limited, terms such as "connected", "provided with", "having" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be said to be a mechanical connection, or it can be directly connected, or it can be connected through an intermediate medium. For those skilled in the art, the basic meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0039] A multi-angle automatic testing device and method for the locking strength of the aircraft oxygen mask latch, such as Figures 1 to 3 As shown, the oxygen mask latch includes a latch body 3 and a latch seat 2, the latch body 3 is locked with the latch seat 2, the latch body 3 and the latch seat 2 are fixedly connected to the oxygen mask through the rope body 1, the latch body 3 includes a latch body 31, locking teeth 32 arranged on both sides of the head of the latch body 31, and two extrusion blocks 33 that expand or contract the two locking teeth 32, the two extrusion blocks 33 are arranged on both sides of the latch body 31, the latch seat 2 includes a latch seat body 21 and a slot 22 arranged in the latch seat body 21, and the inner walls of the slot 22 are provided with locking strips 23 that match the locking teeth 32 of the latch body 31.

[0040] The present invention comprises a lower movable seat 4 connected to the latch body 3 and an upper movable seat 5 connected to the latch seat 2. The lower movable seat 4 and the upper movable seat 5 move horizontally in a reciprocating manner. The upper movable seat 5 is fixedly connected with a fixed frame 6. The lower movable seat 4 has a lifting frame 7 that can be lifted up and down. The fixed frame 6 has a turntable 10. The lifting frame 7 has a turntable 2 11. The fixed frame 6 and the lifting frame 7 respectively have a plurality of limit locking structures 8 that enable the corresponding turntable 10 and turntable 2 11 to achieve longitudinal limit. The turntable 10 has a card slot 15 that limits and fixes the latch seat 2. The fixed frame 6 The upper automatic sliding block 12 is connected to one end of the rope body 1 on the latch seat 2, and the upper automatic sliding block 12 slides freely horizontally on the fixing frame 6 under external force. The lifting frame 7 has a second card slot 16 for limiting and fixing the latch body 3. The lifting frame 7 has a lower automatic sliding block 13 connected to one end of the rope body 1 on the latch body 3, and the lower automatic sliding block 13 slides freely horizontally on the lifting frame 7 under external force. The second turntable 11 has a driving structure 9 for squeezing the two squeezing blocks 33 on the latch body 31, and a lifting electric cylinder 14 is provided between the lifting frame 7 and the lower moving seat 4;

[0041] The latch seat 2 and the latch body 3 are limited and fixed in the corresponding card slot 15 and the card slot 2 16, and the limit locking structure 8 performs longitudinal limit on the turntable 10 and the turntable 2 11, so that the latch seat 2 and the latch body 3 are aligned up and down, and the driving structure 9 squeezes the two squeezing blocks 33 on the latch body 31, so that the two locking teeth 32 at the head of the latch body 31 shrink inward, and the jacking electric cylinder 14 is started to drive the jacking frame 7 to move upward, so that the head of the latch body 31 extends into the slot 22 of the latch seat 2. When the driving structure 9 cancels the squeezing of the two squeezing blocks 33 on the latch body 31, the locking teeth 32 at the head of the latch body 31 expand outward and are aligned with the latch body 31. The locking strip 23 on the inner wall of the groove 22 cooperates to complete the locking cooperation between the latch body 3 and the latch seat 2. At this time, the limit locking structure 8 cancels the longitudinal limit of the turntable 10 and the turntable 2 11, and the upper moving seat 5 and the lower moving seat 4 move back to back. At this time, the turntable 10 and the turntable 2 11 can freely adjust the rotation angle with the movement of the upper moving seat 5 and the lower moving seat 4, and the upper automatic sliding block 12 and the lower automatic sliding block 13 can freely adjust the sliding position with the movement of the upper moving seat 5 and the lower moving seat 4, thereby generating outward pulling force on the rope body 1 on the latch seat 2 and the rope body 1 on the latch body 3, respectively, to complete the locking strength test of the oxygen supply mask latch.

[0042] When the present invention performs a locking strength test on the latch of the aviation oxygen supply mask, the latch seat 2 and the latch body 3 are first aligned up and down, and the verticality of the latch body 3 and the latch seat 2 during the plugging process is achieved through the mutual cooperation of the driving structure 9, the limit locking structure 8 and the jacking electric cylinder 14, and then the upper moving seat 5 and the lower moving seat 4 move backwards, so that the latch after the locking is subjected to horizontal backward pulling force in the up and down directions, and the latch after the locking is subjected to multi-angle force, and the automatic plug-in matching, vertical locking strength test, multi-angle locking strength test and automatic restoration and resetting after the test are simultaneously achieved, thereby improving the level of automated testing and the test accuracy, and meeting the high-standard testing requirements for the latch on the aviation oxygen supply mask.

[0043] The most important distinguishing feature of the present invention is that with regard to the plug-in cooperation of the pin, manual plug-in cooperation cannot meet the efficiency and accuracy of the locking strength test of the oxygen mask pin, which is essentially different from the conventional products that perform strength tests after limiting and fixing. Therefore, the locking strength testing equipment in this application simultaneously realizes automatic plug-in cooperation, vertical locking strength test, multi-angle locking strength test and automatic restoration and resetting after test, which is a technical point that urgently needs to be protected in this application.

[0044] On the basis of this embodiment, the limit locking structure 8 includes a plurality of equally spaced circumferentially distributed shafts 81 arranged on turntable 10 or turntable 2 11, and also includes a plurality of limit platforms 82 arranged on the fixed frame 6 or the lifting frame 7. The plurality of limit platforms 82 and the plurality of shafts 81 are arranged in sequence corresponding to and cooperate with each other. The fixed frame 6 or the lifting frame 7 has an electric push rod 83 for horizontally reciprocatingly pushing the limit platform 82. When the electric push rod 83 pushes the limit platform 82 to cooperate with the corresponding shaft 81, turntable 10 or turntable 2 11 is in a locked state. When the electric push rod 83 pushes the limit platform 82 to separate from the corresponding shaft 81, turntable 10 or turntable 2 11 is in an active state.

[0045] When the latch seat 2 is plugged into the latch body 3, the limit locking structure 8 limits and fixes the turntable 1 10 and the fixed frame 6, the turntable 2 11 and the lifting frame 7. When the latch seat 2 and the latch body 3 complete the locking fit, the limit locking structure 8 cancels the fixation between the turntable 10 and the fixed frame 6, the turntable 2 11 and the lifting frame 7. During the back-to-back movement of the upper movable seat 5 and the lower movable seat 4, the latch body 3 and the latch seat 2 are subjected to horizontal back-to-back pulling forces in the up and down directions, and the rotation angles of the turntable 10 and the turntable 2 11 and the sliding positions of the upper automatic sliding block 12 and the lower automatic sliding block 13 can be freely adjusted. Therefore, the setting of the limit locking structure 8 realizes the plug-in fit of the latch and the automation level of multi-angle force application.

[0046] On the basis of the present embodiment, turntable 10 and turntable 2 11 are embedded in the corresponding fixing frame 6 and lifting frame 7. The fixing frame 6 has an inlay hole 17 for facilitating the rotation of turntable 10. The horizontal length of the inlay hole 17 is greater than the diameter of the turntable 10. The outer wall of the turntable 10 and the inner wall of the inlay hole 17 are mutually embedded. The lifting frame 7 has an inlay hole 18 for facilitating the rotation of turntable 2 11. The horizontal length of the inlay hole 18 is greater than the diameter of the turntable 11. The outer wall of the turntable 11 and the inner wall of the inlay hole 18 are mutually embedded.

[0047] It should be noted that in the present invention, the size of the inlay hole 17 is consistent with the size of the inlay hole 2 18, and the diameter of the turntable 10 is consistent with the diameter of the turntable 2 11. Therefore, when the limit locking structure 8 cancels the limit on the turntable 10 and the turntable 2 11, the turntable 10 and the turntable 2 11 will rotate freely in the corresponding inlay hole 17 and the inlay hole 2 18 as the upper moving seat 4 and the lower moving seat 5 move backwards.

[0048] On the basis of this embodiment, the driving structure 9 includes a pushing block 91 distributed on the outside of the extrusion block 33. The pushing block 91 is reciprocated along the extension direction of the latch body 3 through the driving group. There is a gap 97 between the pushing block 91 and the extrusion block 33. The side wall of the pushing block 91 close to the extrusion block 33 has a protrusion 92 that matches the end face of the extrusion block 33. When the protrusion 92 of the pushing block 91 moves to the corresponding extrusion block 33, the extrusion block 33 is squeezed inward by the protrusion 92 and contracts.

[0049] The driving group includes a rack portion 93 arranged on the end surface of the pushing block 91 away from the extrusion block 33. The extension direction of the rack portion 93 is consistent with the extension direction of the latch body 3. The rack portion 93 is placed on the outer side of the turntable 11. The lifting frame 7 is provided with a driving motor 94. The driving end of the driving motor 94 is sleeved with a gear 95. The gear 95 cooperates with the rack portion 93. The gear 95 rotates as the driving motor 94 is started, and meshes with the rack portion 93, thereby driving the pushing block 91 to move reciprocatingly up and down.

[0050] In the present invention, there is a gap 97 between the pushing block 91 and the extruding block 33. When the pushing block 91 moves back and forth under the action of the driving motor 94 (the extruding block 33 is not in contact with the protrusion 92), the pushing block 91 and the extruding block 33 will not have surface contact, thereby preventing the pushing block 91 from causing wear to the outer wall of the extruding block 33 during the moving activity. When the protrusion 92 of the pushing block 91 moves to the position of the extruding block 33 and is in contact with the extruding block 33, the extruding block 33 contracts inwardly and retracts the locking tooth 32, providing a basis for the insertion of the latch body 3 into the latch seat 2.

[0051] On the basis of this embodiment, the lower moving seat 4 has a guide column 96 extending vertically toward the push block 91, and the guide column 96 vertically penetrates the push block 91. The push block 91 reciprocates up and down on the corresponding guide column 96 with the meshing transmission of the gear 95 and the rack portion 93. There is a gap between the end face of the push block 91 and the turntable 10 for easy embedding of the limit locking structure 8.

[0052] In the present application, since a certain avoidance space needs to be provided between the push block 91 and the turntable 2 11 for the limit locking structure 8, there is a certain gap between the push block 91 and the end surface of the turntable 2 11, and the setting of the guide column 96 plays a certain positioning role for the push block 91, and plays a role in vertical limiting the push block 91 during the up and down reciprocating motion, thereby ensuring the verticality of the push block 91 during the up and down movement, and achieving force balance on both sides of the two extrusion blocks 33.

[0053] Based on this embodiment, both the upper automatic sliding block 12 and the lower automatic sliding block 13 have pressure sensors in contact with the rope body 1 .

[0054] On the basis of this embodiment, the card slot 1 15 has a magnetic attraction layer 1 that is adsorbed and fixed to the pin seat 2, and the card slot 2 16 has a magnetic attraction layer 2 that adsorbs and fixes the pin body 3. Since the pins are mostly made of stainless steel, the setting of the magnetic attraction layer 1 and the magnetic attraction layer 2 can quickly fix the pin body 3 and the pin seat 2 in the corresponding card slot 1 15 and the card slot 2 16.

[0055] A multi-angle automatic testing device and method for the locking strength of an aviation oxygen mask latch, the specific steps comprising:

[0056] S1, the latch seat 2 containing the rope body 1 is positioned and fixed in the slot 1 15 of the fixing frame 6, the end of the rope body 1 on the latch seat 2 is fixed to the upper automatic sliding block 12, the latch body 3 containing the rope body 1 is positioned and fixed in the slot 2 16 of the lifting frame 7, and the end of the rope body 1 on the latch body 3 is fixed to the lower automatic sliding block 13;

[0057] S2, the limit locking structure 8 on the fixing frame 6 and the lifting frame 7 is started, and the electric push rod 83 pushes the limit platform 82 to move toward the shaft 81 of the turntable 10 or the turntable 2 11, so that the shafts 81 on both sides of the turntable 10 or the turntable 2 11 are respectively in contact with the corresponding limit platforms 82, so as to realize the vertical limit of the turntable 10 and the turntable 2 11, and ensure that the latch seat 2 corresponds to the latch body 3 in the upper and lower directions;

[0058] S3, the driving motor 94 on the lifting frame 7 rotates forward, so that the gear 95 is meshed with the rack part 93 for transmission, thereby driving the pushing block 91 to move along the extension direction of the bolt body 3. When the protrusion 92 on the inner side of the pushing block 91 passes through the squeezing block 33 of the bolt body 3, the two squeezing blocks 33 are squeezed inward by the inward squeezing force of the protrusion 92, so that the locking teeth 32 at the head of the bolt body 3 are contracted inward, which facilitates the subsequent insertion of the bolt body 3 into the bolt seat 2, and the driving motor 94 stops starting;

[0059] S4, the lifting electric cylinder 14 drives the lifting frame 7 to move upward, so that the latch body 3 extends into the latch seat 2 for a predetermined distance, and then the driving motor 94 rotates in the opposite direction. When the protrusion 92 on the pushing block 91 is separated from the squeezing block 33 on the latch body 3, the squeezing blocks 33 on both sides of the latch body 3 pop outward, so that the locking teeth 32 on both sides of the latch body 3 pop outward and contact with the locking strips 23 in the latch seat 2. Figure 4 As shown, the locking of the latch body 3 and the latch seat 2 is completed;

[0060] S5, the electric push rod 83 of the upper limit locking structure 8 of the fixed frame 6 and the lifting frame 7 is retracted and reset, and the limit of the turntable 10 and the turntable 2 11 is cancelled. Figure 5As shown, the upper moving seat 5 and the lower moving seat 4 move in opposite directions. At this time, the turntable 10 and the turntable 2 11 freely adjust the rotation angle as the upper moving seat 5 and the lower moving seat 4 move. The upper automatic sliding block 12 and the lower automatic sliding block 13 freely adjust the sliding position as the upper moving seat 5 and the lower moving seat 4 move. Thus, an outward pulling force is generated on the rope body 1 on the latch seat 2 and the rope body 1 on the latch body 3, respectively. The pressure sensor detects the pressure value of the rope body 1 in real time. When the pressure value reaches the value preset by the system, the upper moving seat 5 and the lower moving seat 4 stop moving for 10-20 seconds. Figure 6 As shown, the upper moving seat 5 and the lower moving seat 4 move in the opposite direction for the same distance and then stop moving for 20-30 seconds, unloading the latch body 3 and the latch seat 2 to complete the locking strength test of the oxygen mask latch. If there is no wear and crack on the surface and inside of the latch body 3 and the latch seat 2, the locking strength of the oxygen mask latch meets the standard.

[0061] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-angle automatic testing device for the locking strength of an aviation oxygen mask latch, the oxygen mask latch comprising a latch body (3) and a latch seat (2), the latch body (3) and the latch seat (2) being locked and matched, the latch body (3) and the latch seat (2) being fixedly connected to the oxygen mask via a rope body (1), the latch body (3) comprising a latch body (31), locking teeth (32) disposed on both sides of the head of the latch body (31), and two extrusion blocks (33) for expanding or contracting the two locking teeth (32), the two extrusion blocks (33) being disposed on both sides of the latch body (31), the latch seat (2) comprising a latch seat body (21) and a slot (22) disposed in the latch seat body (21), the inner walls of the slot (22) being provided with locking strips (23) matching with the locking teeth (32) of the latch body (31), characterized in that: The invention comprises a lower movable seat (4) connected to the latch body (3) and an upper movable seat (5) connected to the latch seat (2); the lower movable seat (4) and the upper movable seat (5) move horizontally in a reciprocating manner; the upper movable seat (5) is fixedly connected to a fixed frame (6); the lower movable seat (4) is provided with a lifting frame (7) which can be lifted up and down; the fixed frame (6) is provided with a turntable 1 (10); the lifting frame (7) is provided with a turntable 2 (11); the fixed frame (6) and the lifting frame (7) are respectively provided with a plurality of limit locking structures (8) which enable the corresponding turntable 1 (10) and turntable 2 (11) to achieve longitudinal limit; the turntable 1 (10) is provided with a slot 1 (15) which limits and fixes the latch seat (2); the fixed frame (6) is provided with a locking groove 1 (15) which limits and fixes the latch seat (2); The frame (6) has an upper automatic sliding block (12) connected to one end of the rope body (1) on the bolt seat (2), and the upper automatic sliding block (12) slides freely horizontally on the fixed frame (6) under external force. The lifting frame (7) has a second clamping groove (16) for limiting and fixing the bolt body (3). The lifting frame (7) has a lower automatic sliding block (13) connected to one end of the rope body (1) on the bolt body (3), and the lower automatic sliding block (13) slides freely horizontally on the lifting frame (7) under external force. The second turntable (11) has a driving structure (9) for squeezing two squeezing blocks (33) on the bolt body (31), and a lifting electric cylinder (14) is provided between the lifting frame (7) and the lower movable seat (4); The latch seat (2) and the latch body (3) are fixed in the corresponding slot 1 (15) and slot 2 (16), and the limit locking structure (8) longitudinally limits the turntable 1 (10) and turntable 2 (11), so that the latch seat (2) and the latch body (3) are aligned vertically, and the driving structure (9) squeezes the two squeezing blocks (33) on the latch body (31) so that the two locking teeth (32) at the head of the latch body (31) are retracted inwardly, and the lifting electric cylinder (14) is started to drive the lifting frame (7) to move upward, so that the head of the latch body (31) extends into the slot (22) of the latch seat (2), and when the driving structure (9) cancels the squeezing of the two squeezing blocks (33) on the latch body (31), the locking teeth (32) at the head of the latch body (31) are expanded outwardly. The locking strip (23) cooperates with the inner wall of the slot (22) to complete the locking cooperation between the latch body (3) and the latch seat (2). At this time, the limit locking structure (8) cancels the longitudinal limit of the turntable (10) and the turntable (11), and the upper movable seat (5) and the lower movable seat (4) move in opposite directions. At this time, the turntable (10) and the turntable (11) can freely adjust the rotation angle along with the movement of the upper movable seat (5) and the lower movable seat (4). The upper automatic sliding block (12) and the lower automatic sliding block (13) can freely adjust the sliding position along with the movement of the upper movable seat (5) and the lower movable seat (4), thereby generating outward pulling force on the rope body (1) on the latch seat (2) and the rope body (1) on the latch body (3), respectively, to complete the locking strength test of the oxygen mask latch.

2. According to claim 1, a multi-angle automatic testing device for the locking strength of the aircraft oxygen mask latch, characterized in that: The limit locking structure (8) comprises a plurality of equally spaced circumferentially distributed shafts (81) arranged on turntable one (10) or turntable two (11), and also comprises a plurality of limit platforms (82) arranged on a fixed frame (6) or a lifting frame (7), wherein the plurality of limit platforms (82) and the plurality of shafts (81) are arranged in sequence and cooperate with each other, and the fixed frame (6) or the lifting frame (7) has an electric push rod (83) for horizontally reciprocatingly pushing the limit platform (82), when the electric push rod (83) pushes the limit platform (82) to cooperate with the corresponding shaft (81), turntable one (10) or turntable two (11) is in a locked state, and when the electric push rod (83) pushes the limit platform (82) to separate from the corresponding shaft (81), turntable one (10) or turntable two (11) is in an active state.

3. According to claim 2, a multi-angle automatic testing device for the locking strength of the aircraft oxygen mask latch, characterized in that: The turntable 1 (10) and the turntable 2 (11) are embedded in the corresponding fixed frame (6) and the lifting frame (7); the fixed frame (6) has an inlay hole 1 (17) for facilitating the rotation of the turntable 1 (10); the horizontal length of the inlay hole 1 (17) is greater than the diameter of the turntable 1 (10); the outer wall of the turntable 1 (10) and the inner wall of the inlay hole 1 (17) are mutually embedded; the lifting frame (7) has an inlay hole 2 (18) for facilitating the rotation of the turntable 2 (11); the horizontal length of the inlay hole 2 (18) is greater than the diameter of the turntable 2 (11); the outer wall of the turntable 2 (11) and the inner wall of the inlay hole 2 (18) are mutually embedded.

4. According to claim 3, a multi-angle automatic testing device for the locking strength of the aircraft oxygen mask latch is characterized in that: The driving structure (9) comprises a pushing block (91) distributed outside the extrusion block (33); the pushing block (91) is reciprocated along the extension direction of the latch body (3) by means of a driving group; a gap (97) is provided between the pushing block (91) and the extrusion block (33); a side wall of the pushing block (91) close to the extrusion block (33) comprises a protrusion (92) matching with an end face of the extrusion block (33); when the protrusion (92) of the pushing block (91) moves to the corresponding extrusion block (33), the extrusion block (33) contracts due to the inward extrusion force of the protrusion (92).

5. According to claim 4, a multi-angle automatic testing device for the locking strength of the aircraft oxygen mask latch, characterized in that: The driving group comprises a rack portion (93) arranged on the end surface of the pushing block (91) away from the squeezing block (33), the extension direction of the rack portion (93) being consistent with the extension direction of the latch body (3), the rack portion (93) being arranged on the outer side of the second turntable (11), the lifting frame (7) having a driving motor (94), the driving end of the driving motor (94) being sleeved with a gear (95), the gear (95) being matched with the rack portion (93), the gear (95) rotating as the driving motor (94) is started, meshing with the rack portion (93), thereby driving the pushing block (91) to move reciprocatingly up and down.

6. The multi-angle automatic testing equipment for the locking strength of the aircraft oxygen mask latch according to claim 5, characterized in that: The lower moving seat (4) is provided with a guide column (96) extending vertically in the direction of the pushing block (91). The guide column (96) vertically penetrates the pushing block (91). The pushing block (91) reciprocates up and down on the corresponding guide column (96) as the gear (95) and the rack portion (93) are meshed and driven. A gap is provided between the end surface of the pushing block (91) and the turntable (10) to facilitate the insertion of the limit locking structure (8).

7. The multi-angle automatic testing equipment for the locking strength of the aircraft oxygen mask latch according to claim 6, characterized in that: The upper automatic sliding block (12) and the lower automatic sliding block (13) are both provided with pressure sensors in contact with the rope body (1).

8. The multi-angle automatic testing equipment for the locking strength of the aircraft oxygen mask latch according to claim 7, characterized in that: The first card slot (15) has a magnetic attraction layer 1 which is adsorbed and fixed to the latch seat (2), and the second card slot (16) has a magnetic attraction layer 2 which adsorbs and fixes the latch body (3).

9. A testing method using the multi-angle automatic testing device for the locking strength of the aircraft oxygen mask latch according to claim 8, characterized in that: The specific steps include: S1. Position and fix the latch seat (2) containing the rope body (1) in the first slot (15) of the fixing frame (6), and fix the end of the rope body (1) on the latch seat (2) to the upper automatic sliding block (12); position and fix the latch body (3) containing the rope body (1) in the second slot (16) of the lifting frame (7), and fix the end of the rope body (1) on the latch body (3) to the lower automatic sliding block (13); S2, the limit locking structure (8) on the fixed frame (6) and the lifting frame (7) is started, and the electric push rod (83) pushes the limit platform (82) to move toward the shaft (81) of the turntable one (10) or the turntable two (11), so that the shafts (81) on both sides of the turntable one (10) or the turntable two (11) respectively cooperate with the corresponding limit platform (82) to achieve the vertical limit of the turntable one (10) and the turntable two (11), ensuring that the latch seat (2) and the latch body (3) correspond to each other up and down; S3, the driving motor (94) on the lifting frame (7) rotates in the forward direction, so that the gear (95) and the rack portion (93) mesh and transmit, thereby driving the pushing block (91) to move along the extension direction of the latch body (3), when the protrusion (92) on the inner side of the pushing block (91) passes through the squeezing block (33) of the latch body (3), the two squeezing blocks (33) are squeezed inward by the inward squeezing force of the protrusion (92), so that the locking teeth (32) at the head of the latch body (3) shrink inward, which facilitates the subsequent insertion of the latch body (3) into the latch seat (2), and the driving motor (94) stops starting; S4, the lifting electric cylinder (14) drives the lifting frame (7) to move upward, so that the latch body (3) extends into the latch seat (2) by a predetermined stroke distance, and then the driving motor (94) rotates in the opposite direction. When the protrusion (92) on the pushing block (91) is separated from the squeezing block (33) on the latch body (3), the squeezing blocks (33) on both sides of the latch body (3) pop outward, so that the locking teeth (32) on both sides of the latch body (3) pop outward and contact with the locking strips (23) in the latch seat (2), thereby completing the locking of the latch body (3) and the latch seat (2); S5, the electric push rod (83) of the upper limit locking structure (8) of the fixed frame (6) and the lifting frame (7) is retracted and reset, and the limit of the turntable 1 (10) and the turntable 2 (11) is cancelled. The upper movable seat (5) and the lower movable seat (4) move in opposite directions. At this time, the turntable 1 (10) and the turntable 2 (11) can freely adjust the rotation angle with the movement of the upper movable seat (5) and the lower movable seat (4), and the upper automatic sliding block (12) and the lower automatic sliding block (13) can freely adjust the sliding position with the movement of the upper movable seat (5) and the lower movable seat (4), thereby respectively adjusting the rope on the latch seat (2) The rope body (1) on the body (1) and the latch body (3) generates an outward pulling force, and the pressure sensor detects the pressure value of the rope body (1) in real time. When the pressure value reaches a value preset by the system, the upper movable seat (5) and the lower movable seat (4) stop moving for 10-20 seconds, and then the upper movable seat (5) and the lower movable seat (4) move in the opposite direction for the same distance and then stop moving for 20-30 seconds, and the latch body (3) and the latch seat (2) are unloaded to complete the locking strength test of the oxygen supply mask latch. If there is no wear and crack on the surface and inside of the latch body (3) and the latch seat (2), the locking strength of the oxygen supply mask latch meets the standard.

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