Aircraft cabin door latch and rocker lock mechanism
The aircraft cabin door latch and rocker lock mechanism simplifies the latching and unlatching movements of the cabin door, solves the problems of complex mechanism and insufficient space in the prior art, and realizes a lightweight and easy-to-install cabin door lock design.
Patent Information
- Application Number
- CN202411873337.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2044-12-18
AI Technical Summary
Existing aircraft cabin door latches and lock mechanisms are complex in design and occupy a large space, making them difficult to arrange in cabin door structures of Type I and below. In addition, the movement mechanism is heavy, requires large operating forces, or has low safety.
The aircraft cabin door latch and rocker-type locking mechanism are adopted, and the latching and unlatching functions of the cabin door are realized through the latch-driven rocker arm and the slot-driven rocker arm operated by the handle. The mechanism is simplified, the distance between the latch axis and the handle axis is reduced, and a simple connecting rod and rocker arm structure is adopted.
A simple motion mechanism is realized, the number of parts and structural weight are reduced, installation and debugging are simplified, the problem of small space of the hatch structure is solved, and maintainability and safety are improved.
Smart Images
Figure CN119737089B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of aircraft cabin door structure design, and in particular to an aircraft cabin door latch and a rocker-type locking mechanism. Background Art
[0002] The commonly used designs for the latch and lock mechanisms of aircraft blocking doors include:
[0003] 1) Latch type latch and spring to hold the latch in place
[0004] In this solution, the latch bolt cannot achieve the lifting movement of the hatch door, and a special lifting mechanism is required to achieve this. The movement mechanism is complex, the structure is heavy, and the economic efficiency is poor. The latch bolt is kept in the latched position by a spring. If the spring force is too large, the operating force is large, while if the spring force is too small, the safety is low.
[0005] 2) Crank latch, the latch drive is linked to the hatch operating handle through a rod system
[0006] In this solution, a set of rods is led out from the hatch operating handle and connected to the latch mechanism to drive the latch mechanism to move. When the latch is engaged, the handle continues to drive the lock mechanism to lock it. At this time, the latch driving rods need to remain in position. In order to achieve this time-sharing function, the latch operating mechanism needs to be equipped with a special time-sharing mechanism, which is complex.
[0007] 3) Key lock or cam lock with handle driving the rod movement
[0008] In this solution, the lock for locking the hatch latch uses a lock key or cam, which is connected to the handle mechanism through a rod system, resulting in a relatively complex mechanism. Due to the requirements of motion transmission and component structural dimensions, the lock mechanism rod system needs to occupy a large amount of hatch structure space. For hatches of size I and below, the structural space is limited, making the mechanism layout difficult.
[0009] 4) The structure space of Type I and smaller hatch doors is small, and the door mechanism is difficult to arrange. Summary of the Invention
[0010] The purpose of the present application is to provide an aircraft cabin door latch and a rocker lock mechanism to solve or alleviate at least one problem in the background technology.
[0011] The technical solution of the present application is: an aircraft cabin door latch and rocker type lock mechanism, comprising: a door frame structure, a cabin door structure, an operating handle, a handle shaft, a latch driving rocker arm, a first locking rocker arm, a second locking rocker arm, a lock retainer, a stop rocker arm, a limit support, a connecting rod, a rocker arm, a latch, a slot-type driving rocker arm, a latch rocker arm, a latch retainer, and a latch slot;
[0012] The door structure is mounted on the door frame structure and can be opened and closed relative to the door frame structure;
[0013] There are two limit supports, which are respectively fixed on the frames on both sides of the door structure;
[0014] Both ends of the handle shaft are pivotally connected to the mounting holes of the limit support and can rotate around the axis;
[0015] The operating handle, the latch driving rocker arm, the first locking rocker arm, the second locking rocker arm and the two stop rocker arms are all fixedly connected to the handle shaft and can rotate with the handle shaft;
[0016] The two ends of the lock holder are hinged to the second lock rocker arm and the door structure;
[0017] There are two rocker arms, one end of each of which is hinged to the door structure, and the other end of each of which is hinged to the first lock rocker arm and the second lock rocker arm respectively through a connecting rod;
[0018] The latch is hinged to the door structure via a latch rocker arm fixedly connected to the latch and a latch keeper hinged to the latch rocker arm;
[0019] There are two latch slots, which are fixedly arranged on both sides of the door frame structure.
[0020] Preferably, the limit support has a closed position limit block and an open position limit block, and the stopping rocker arm has a closed position stop pin and an open position stop pin, and the closed position stop pin and the open position stop pin cooperate with the closed position limit block and the open position limit block respectively.
[0021] Preferably, the latch driving rocker arm comprises a double-ear rocker arm and a roller arranged on the double-ear rocker arm, and when the latch driving rocker arm rotates, the roller can cooperate with the groove-type driving rocker arm.
[0022] Preferably, the second lock rocker arm comprises a connecting rod double ear and a lock retainer double ear, the connecting rod double ear is connected to the rocking rod through a connecting rod, and the lock retainer is hinged on the lock retainer double ear.
[0023] Preferably, the latch comprises a latch shaft, a latch crank and a latch roller, and there are two latch cranks and two latch rollers. The latch cranks are arranged at both ends of the latch shaft, and a latch roller is arranged at the end of each latch crank.
[0024] Preferably, the groove-type driving rocker arm is fixedly mounted on the latch shaft, and the groove-type driving rocker arm includes a first lock key, a first retainer double ear and a groove-type fork ear, the first lock key cooperates with the lock boss of the rocker arm when the latch rotates, the first retainer double ear is connected to the latch retainer, and the groove-type fork ear cooperates with the roller of the latch driving rocker arm.
[0025] Preferably, the latch rocker arm comprises a second lock key and a second retainer double ear, wherein the second lock key cooperates with the lock boss of the rocker rod when the latch rotates, and the second retainer double ear is connected to the latch retainer.
[0026] Preferably, the latch slot has a roller support profile, and the latch roller of the latch is disposed within the roller support profile. Preferably, when the hatch is closed, the lock boss of the rocker arm engages with the first lock key of the slot-shaped drive rocker arm and the second lock key of the latch rocker arm, respectively, restricting the clockwise unlatching movement of the latch. The lock retainer maintains the rocker arm in the locked position through an upward force, and the closed position stop pin of the stop rocker arm engages with the closed position limit block of the limit support, restricting the clockwise reverse movement of the handle shaft.
[0027] Preferably, when the hatch is opened, the operating handle is rotated counterclockwise outward and upward to drive the handle shaft, the latch drive rocker arm, the first lock rocker arm, the second lock rocker arm, and the stop rocker arm to rotate counterclockwise synchronously, and the first lock rocker arm and the second lock rocker arm pull the connecting rod to move, driving the rocker arm to rotate clockwise around its lower end rotation axis; when the roller of the latch drive rocker arm moves to contact the grooved fork ear of the grooved drive rocker arm, the lock boss of the rocker arm disengages from the first lock key of the grooved drive rocker arm and the second lock key of the latch rocker arm, and the hatch is unlocked.
[0028] Preferably, the operating handle continues to be rotated outward and upward counterclockwise, and the roller of the latch driving rocker arm squeezes the grooved fork ear of the groove driving rocker arm, driving the latch driving rocker arm to rotate clockwise, driving the latch to rotate synchronously clockwise around the center line of the latch shaft; the latch roller of the latch contacts the roller support profile of the latch groove, and the roller support profile limits the latch roller from moving downward, driving the latch shaft to move upward relative to the latch roller, thereby driving the hatch structure to move upward relative to the door frame structure. When the latch roller moves to the right end of the roller support profile, the hatch door is unlatched, and the open position stop pin of the stop rocker arm is engaged with the open position limit block of the limit support, limiting the operating handle from continuing to rotate upward; the lock retainer provides an upward force to keep the operating handle in the open state at all times, and the latch retainer provides an upward force to keep the latch in the unlatched state at all times, at this time opening the hatch door outward.
[0029] The aircraft cabin door latch and rocker lock mechanism provided by this application have the following advantages:
[0030] 1) The bolt is driven by a bolt drive rocker fixed on the handle shaft, which has a simple motion mechanism, a small number of parts, open space, simple installation and debugging, light structure and good maintainability;
[0031] 2) The latch shaft and the handle shaft are connected only through the latch drive rocker arm and the slot drive rocker arm, which makes the mechanism simple;
[0032] 3) The distance between the latch axis and the handle axis is small, and the structure is compact, which solves the problem of small structural space and difficult door mechanism layout in Type I and smaller doors. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.
[0034] Figure 1 This is a schematic diagram of the aircraft cabin door latch and swing lock mechanism in the closed state.
[0035] Figure 2 This is a schematic diagram of the aircraft cabin door latch and swing lock mechanism of this application.
[0036] Figure 3 This is a schematic diagram of the lock mechanism and handle composition of this application.
[0037] Figure 4 This is a schematic diagram of the latch mechanism of this application.
[0038] Figure 5 This is a schematic diagram of the aircraft cabin door latch and swing lock mechanism of the present application during the opening state.
[0039] Figure 6 This is a schematic diagram of the counterclockwise state process of the aircraft cabin door latch and swing lock mechanism of this application.
[0040] Figure 7 This is a schematic diagram of the application of the aircraft cabin door latch and swing lock mechanism of this application. DETAILED DESCRIPTION
[0041] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.
[0042] The present application provides an aircraft cabin door latch and a rocker-type locking mechanism, which realizes the latching and unlatching and cabin door lifting movement functions by arranging a crank-type latch on the cabin door, and locks the latch mechanism after the cabin door is latched by arranging a rocker-type lock operated by a handle on the cabin door, and separates the latch driving rocker arm and the slot driving rocker arm by arranging a latch driving rocker arm operated by the handle and a slot driving rocker arm fixed on the latch shaft, and engages with each other only when the cabin door locking mechanism is unlocked, thereby realizing the unlatching movement of the cabin door.
[0043] This application simplifies the mechanism form through a new design of the connection between the handle mechanism, latch mechanism, and lock mechanism, greatly compresses the distance between the latch axis and the handle axis, and solves the problem of small structural space and difficult arrangement of the door mechanism for Type I and below doors.
[0044] like Figures 1 to 7As shown, the aircraft cabin door latch and rocker type locking mechanism provided by the present application includes: a door frame structure 1, a cabin door structure 2, an operating handle 3, a handle shaft 4, a latch driving rocker arm 5, a first locking rocker arm 6, a second locking rocker arm 7, a lock retainer 8, a stop rocker arm 9, a limit support 10, a connecting rod 11, a rocker arm 12, a latch 13, a slot-type driving rocker arm 14, a latch rocker arm 15, a latch retainer 16 and a latch slot 17.
[0045] The hatch door structure 2 is installed on the door frame structure 1 and can be opened and closed on the door frame structure 1 .
[0046] The limiting support 10 has a closing position limiting block 101 and an opening position limiting block 102 . There are two limiting supports 10 , which are fixedly mounted on the frames on both sides of the door structure 2 .
[0047] Both ends of the handle shaft 4 are pivotally connected to the mounting holes of the limiting support 10 and can rotate around the axis.
[0048] The operating handle 3, the latch drive rocker arm 5, the first lock rocker arm 6, the second lock rocker arm 7, and the two stop rocker arms 9 are all fixedly connected to the handle shaft 4. By rotating the operating handle 3, the handle shaft 4 and other components can be driven to move.
[0049] Among them, the latch driving rocker arm 5 includes a double-ear rocker arm 51 and a roller 52 arranged on the double-ear rocker arm 51. When the latch driving rocker arm 5 rotates, the roller 52 can cooperate with the grooved fork ear 143 of the grooved driving rocker arm 14.
[0050] The second lock rocker arm 7 includes a connecting rod double ear 71 and a lock retainer double ear 72 . The connecting rod double ear 71 is connected to the rocking rod 12 through the connecting rod 11 , and the lock retainer double ear 72 is hinged to the lock retainer 8 .
[0051] The stopping rocker arm 9 has a closing position stopping pin 91 and an opening position stopping pin 92 , which respectively cooperate with the closing position limiting block 101 and the opening position limiting block 102 of the limiting support 10 .
[0052] The lock retainer 8 includes a lock retainer piston rod 81, a lock retainer spring 82, and a lock retainer outer tube 83. The lock retainer piston rod 81 is disposed inside the lock retainer outer tube 83 and is slidably connected thereto. The lock retainer spring 82 is disposed outside the lock retainer outer tube 83 to provide a buffering force between the lock retainer piston rod 81 and the lock retainer outer tube 83. The upper end of the lock retainer 8 is hinged to the lock retainer ears 72 of the second lock rocker arm 7, and the lower end is hinged to the hatch structure 2.
[0053] The connecting rod 11 is composed of two parts, the upper end of one connecting rod 11 is hinged to the connecting rod double ears 71, the upper end of the other connecting rod 11 is hinged to the first locking rocker arm 6, and the lower ends of the two connecting rods 11 are respectively hinged to the double ears of the two rocking rods 12.
[0054] There are two rocker arms 12 , and a locking boss 121 is provided on one side thereof connected to the connecting rod double ears 71 and the first locking rocker arm 6 . The lower ends of the rocker arms 12 are respectively hinged to the hatch structure 2 .
[0055] The latch 13 includes a latch shaft 131, a latch crank 132, and a latch roller 133. There are two latch cranks 132 and two latch rollers 133. The latch cranks 132 are provided at both ends of the latch shaft 131, and a latch roller 133 is provided at the end of each latch crank 132. The latch 13 is hinged to the door structure 2 via a latch rocker 15 and a latch retainer 16.
[0056] The slot-type driving rocker arm 14 is fixedly mounted on the latch shaft 131, and includes a first lock key 141, a first retainer double ear 142 and a slot-type fork ear 143. The first lock key 141, the first retainer double ear 142 and the slot-type fork ear 143 are not coplanar in the circumferential direction. The first lock key 141 can cooperate with the lock boss 121 of the rocker arm 12 when the latch 13 rotates. The first retainer double ear 142 is connected to the latch retainer 16, and the slot-type fork ear 143 can cooperate with the roller 52 of the latch driving rocker arm 5.
[0057] The latch rocker arm 15 is fixedly connected to the latch shaft 131 and includes a second lock key 151 and a second retainer double ear 152. The second lock key 151 can cooperate with the lock boss 121 of the rocker arm 12 when the latch 13 rotates, and the second retainer double ear 152 is connected to the latch retainer 16.
[0058] The latch retainer 16 comprises a latch retainer piston rod 161, a latch retaining spring 162, and a latch retainer outer tube 163. The latch retainer piston rod 161 is disposed inside the latch retainer outer tube 163 so that the two can slide relative to each other. The latch retaining spring 162 is sleeved inside the latch retainer outer tube 163. The latch retainer 16 is a two-piece component, the upper ends of which are hinged to the first retainer ears 142 and the second retainer ears 152, respectively, and the lower ends of which are both hinged to the door structure 2.
[0059] The latch groove 17 has a roller supporting profile 171 . The two latch grooves 17 are fixedly disposed on both sides of the door frame structure 1 , respectively, corresponding to the positions of the latch rollers 133 of the latch 13 .
[0060] like Figure 1 As shown, when the hatch is closed, the lock boss 121 of the rocker arm 12 engages with the first lock key 141 of the groove-type driving rocker arm 14 and the second lock key 151 of the latch rocker arm 15, respectively, limiting the clockwise unlatching movement of the latch 13. The upward force of the lock retainer 8 keeps the rocker arm 12 in the locked position at all times, and the closed position stop pin 91 of the stop rocker arm 9 fits with the closed position limit block 101 of the limit support 10, limiting the tendency of the handle shaft 4 to reverse clockwise.
[0061] like Figure 5As shown, to open the hatch, the operating handle 3 is rotated counterclockwise outward and upward, driving the handle shaft 4, the latch drive rocker arm 5, the first lock rocker arm 6, the second lock rocker arm 7, and the stop rocker arm 9 to rotate counterclockwise synchronously. The first lock rocker arm 6 and the second lock rocker arm 7 pull the connecting rod 11 to move, driving the rocker arm 12 to rotate clockwise about its lower end rotation axis. When the roller 52 of the latch drive rocker arm 5 moves to contact the grooved fork ear 143 of the grooved drive rocker arm 14, the lock boss 121 of the rocker arm 12 disengages from the first lock key 141 of the grooved drive rocker arm 14 and the second lock key 151 of the latch rocker arm 15, and the hatch is unlocked.
[0062] like Figure 6 As shown, the operating handle 3 is continued to be rotated counterclockwise outward and upward, and the roller 52 of the latch driving rocker arm 5 squeezes the grooved fork ear 143 of the grooved driving rocker arm 14, driving the latch driving rocker arm 5 to rotate counterclockwise, driving the latch 13 to rotate synchronously clockwise around the center line of the latch shaft 131; the latch roller 133 of the latch 13 contacts the roller support profile 171 of the latch groove 17, and the roller support profile 171 restricts the latch roller 133 from moving downward, driving the latch shaft 131 to move upward relative to the latch roller 133, This drives the hatch structure 2 to move upward relative to the door frame structure 1. When the latch roller 133 moves to the right end of the roller support surface 171, the hatch is unlatched, and the open position stop pin 92 of the stopping rocker arm 9 is engaged with the open position limit block 102 of the limit support 10, restricting the operating handle 3 from continuing to rotate upward; the upward force of the lock retainer 8 keeps the operating handle 3 in the open state, and the upward force of the latch retainer 16 keeps the latch 13 in the unlatched state. At this time, the hatch can be opened outward.
[0063] The aircraft cabin door latch and rocker lock mechanism provided by this application have the following advantages:
[0064] 1) The bolt is driven by a bolt drive rocker fixed on the handle shaft, which has a simple motion mechanism, a small number of parts, open space, simple installation and debugging, light structure and good maintainability;
[0065] 2) The latch shaft and the handle shaft are connected only through the latch drive rocker arm and the slot drive rocker arm, which makes the mechanism simple;
[0066] 3) The distance between the latch axis and the handle axis is small, and the structure is compact, which solves the problem of small structural space and difficult door mechanism layout in Type I and smaller doors.
[0067] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. An aircraft cabin door latch and rocker lock mechanism, characterized in that: include: Door frame structure, hatch structure, operating handle, handle shaft, latch drive rocker arm, first lock rocker arm, second lock rocker arm, lock keeper, stop rocker arm, limit support, connecting rod, rocker arm, latch, slot drive rocker arm, latch rocker arm, latch keeper and latch slot; The door structure is mounted on the door frame structure and can be opened and closed relative to the door frame structure; There are two limit supports, which are respectively fixed on the frames on both sides of the door structure. The limit supports have a closing position limit block and an opening position limit block. The stopping rocker arm has a closing position stop pin and an opening position stop pin, which respectively cooperate with the closing position limit block and the opening position limit block; Both ends of the handle shaft are pivotally connected to the mounting holes of the limit support and can rotate around the axis; The operating handle, the latch driving rocker arm, the first lock rocker arm, the second lock rocker arm and the two stop rocker arms are all fixedly connected to the handle shaft and can rotate with the handle shaft. The latch driving rocker arm includes a double-ear rocker arm and a roller provided on the double-ear rocker arm. When the latch driving rocker arm rotates, the roller can cooperate with the groove-type driving rocker arm. The second lock rocker arm includes a connecting rod double ear and a lock keeper double ear. The connecting rod double ear is connected to the rocking rod through a connecting rod. The lock keeper double ear is hinged on the lock keeper; The two ends of the lock holder are hinged to the second lock rocker arm and the door structure; There are two rocker arms, one end of each of which is hinged to the door structure, and the other end of each of which is hinged to the first lock rocker arm and the second lock rocker arm respectively through a connecting rod; The latch comprises a latch shaft, a latch crank and a latch roller, wherein the latch crank and the latch roller are two in number, the latch crank being arranged at both ends of the latch shaft, and the latch roller being arranged at the end of each latch crank, and the latch being hingedly connected to the door structure via a latch rocker arm fixedly connected to the latch and a latch retainer hingedly connected to the latch rocker arm; The slot-type driving rocker arm is fixedly mounted on the latch shaft, and the slot-type driving rocker arm includes a first lock key, a first retainer double ear, and a slot-type fork ear, wherein the first lock key cooperates with the lock boss of the rocker arm when the latch rotates, the first retainer double ear is connected to the latch retainer, and the slot-type fork ear cooperates with the roller of the latch-driving rocker arm; The latch rocker arm includes a second lock key and a second retainer ear, the second lock key engages with the lock boss of the rocker arm when the latch is rotated, and the second retainer ear connects to the latch retainer; There are two latch grooves, which are fixedly arranged on both sides of the door frame structure respectively. The latch groove has a roller support profile, and the latch roller of the latch is arranged in the roller support profile; When the hatch is closed, the locking boss of the rocker arm engages with the first locking key of the slot-type driving rocker arm and the second locking key of the latch rocker arm respectively, limiting the clockwise unlatching movement of the latch. The lock retainer keeps the rocker arm in the locked position at all times through the upward force, and the closing position stop pin of the stop rocker arm fits with the closing position limit block of the limit support, limiting the tendency of the handle shaft to reverse clockwise.
2. The aircraft cabin door latch and rocker lock mechanism according to claim 1, wherein: When the hatch is opened, the operating handle is rotated counterclockwise outward and upward to drive the handle shaft, the latch drive rocker arm, the first lock rocker arm, the second lock rocker arm, and the stop rocker arm to rotate counterclockwise synchronously. The first lock rocker arm and the second lock rocker arm pull the connecting rod to move, driving the rocker arm to rotate clockwise around its lower end rotation axis; when the roller of the latch drive rocker arm moves to contact the grooved fork ear of the grooved drive rocker arm, the lock boss of the rocker arm disengages from the first lock key of the grooved drive rocker arm and the second lock key of the latch rocker arm, and the hatch is unlocked.
3. The aircraft cabin door latch and rocker lock mechanism according to claim 1, wherein: The latch shaft is then released and the door is opened, and the latch roller is in a position to move upward relative to the latch shaft, and the latch shaft is in a position to move upward relative to the latch roller, and the door is opened and closed.
Citation Information
Patent Citations
Lifting device for airplane cabin door
CN106812400A
Cabin door lifting opening icebreaking mechanism
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