Aircraft cabin door latch and swing rod type lock mechanism

Abstract

The invention provides an aircraft cabin door latch and a swing rod type lock mechanism, and belongs to the field of aircraft cabin door structure design. The aircraft cabin door latch and swing rod type lock mechanism comprises a door frame structure, a cabin door structure, an operating handle, a handle shaft, a latch driving rocker arm, a first lock rocker arm, a second lock rocker arm, a lock retainer, a stop rocker arm, a limiting support, a connecting rod, a swing rod, a latch, a groove type driving rocker arm, a latch rocker arm, a latch retainer and a latch groove. The crank type latch is arranged on the cabin door, the functions of latching and unlatching of the cabin door and lifting motion of the cabin door are achieved, the swing rod type lock operated by the handle and the latch locking mechanism after latching of the cabin door are arranged on the cabin door, and the latch driving rocker arm operated by the handle and the groove type driving rocker arm fixed to the latch shaft are arranged; when the cabin door lock mechanism is unlocked, the latch driving rocker arm and the groove-shaped driving rocker arm are engaged, so that the unlatching movement of the cabin door is realized.

Description

Technical Field

[0001] The present application belongs to the field of aircraft cabin door structure design, and in particular relates to an aircraft cabin door latch and a rocker-type locking mechanism. Background Art

[0002] The commonly used designs of the latch and lock mechanism of the aircraft blocking door include:

[0003] 1) Latch and spring to hold the latch in place

[0004] In this solution, the latch bolt cannot realize the lifting movement of the hatch door, and a special lifting mechanism needs to be set to realize the lifting movement of the hatch door. The movement mechanism is complex, the structure is heavy, and the economy is not good. A spring is used to keep the latch bolt in the upper latch position. If the spring force is too large, the operating force is large, and if the spring force is too small, the safety is low.

[0005] 2) Crank type latch, the drive of the latch is linked to the door operating handle through a rod system

[0006] In this solution, a set of rods are led out from the hatch operating handle and connected to the latch mechanism to drive the latch mechanism to move. When the latch is locked, the handle continues to drive the lock mechanism to lock. At this time, the latch driving rod system needs to remain in position. In order to realize the time-sharing function, the latch operating mechanism needs to be equipped with a special time-sharing mechanism, which is complicated.

[0007] 3) Key lock or cam lock for handle-driven lever movement

[0008] In this solution, the lock for locking the hatch latch adopts a lock key or cam, which is connected to the handle mechanism through a rod system, and the mechanism is relatively complex; based on the requirements of motion transmission and structural dimensions of components, the lock mechanism rod system needs to occupy a large hatch structure space. For hatches of size I and below, the structural space is limited and the mechanism layout is difficult;

[0009] 4) The space for hatch structures of Type I and below is small, and the hatch 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-type 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 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] The two 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 retainer 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 locking rocker arm and the second locking rocker arm 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 retainer hinged to the latch rocker arm;

[0019] There are two latch slots, which are respectively fixedly arranged on two sides of the door frame structure.

[0020] Preferably, the limit support has a closing position limit block and an opening position limit block, and the stopping rocker arm has a closing position stop pin and an opening position stop pin, and the closing position stop pin and the opening position stop pin cooperate with the closing position limit block and the opening 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 rocker arm through a connecting rod, and the lock retainer double ear 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 comprises a first lock key, a first retainer double ears 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 ears are 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 ear, wherein the second lock key cooperates with the lock boss of the rocker rod when the latch rotates, and the second retainer ear is connected to the latch retainer.

[0026] Preferably, the latch groove has a roller support profile, and the latch roller of the latch is arranged in the roller support profile. Preferably, in the closed state of the hatch, the lock boss of the swing rod is respectively engaged with the first lock key of the slot-type driving rocker arm and the second lock key of the latch rocker arm, limiting the clockwise unlatching movement of the latch, and the lock retainer keeps the swing rod in the locked position through the upward force, and the closed position stop pin of the stop rocker arm is in contact with the closed position limit block of the limit support, limiting the tendency of the handle shaft to reverse clockwise.

[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 counterclockwise outward and upward, 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 supporting surface of the latch groove, and the roller supporting surface limits the downward movement of the latch roller, driving the latch shaft to move upward relative to the latch roller, thereby driving the cabin door structure to move upward relative to the door frame structure. When the latch roller moves to the right end of the roller supporting surface, the cabin door is unlatched, and the open position stop pin of the stop rocker arm is in contact 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, and the cabin door is now opened outward.

[0029] The aircraft cabin door latch and rocker lock mechanism provided by the present application have the following advantages:

[0030] 1) The drive of the bolt is realized by the bolt drive rocker arm fixed on the handle shaft, with 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 only connected through the latch drive rocker arm and the slot drive rocker arm, and the mechanism is 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 layout of door mechanisms for Type I and smaller doors. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0034] Figure 1 This is a schematic diagram of the closed state of the aircraft cabin door latch and the swing lock mechanism of the present application.

[0035] Figure 2 This is a schematic diagram of the aircraft cabin door latch and swing lock mechanism of the present application.

[0036] Figure 3 This is a schematic diagram of the lock mechanism and handle composition of the present application.

[0037] Figure 4 This is a schematic diagram of the latch mechanism of the present application.

[0038] Figure 5 This is a schematic diagram of the opening process of the aircraft cabin door latch and the swing lock mechanism of the present application.

[0039] Figure 6 This is a schematic diagram of the counterclockwise state process of the aircraft cabin door latch and swing lock mechanism of the present application.

[0040] Figure 7 This is a schematic diagram of the application of the aircraft cabin door latch and swing lock mechanism of the present 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 functions of latching and unlatching the cabin door and lifting the cabin door 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 they engage only when the cabin door locking mechanism is unlocked, thereby realizing the unlatching movement of the cabin door.

[0043] The present application simplifies the mechanism form and greatly reduces the distance between the latch axis and the handle axis through a new design of the connection between the handle mechanism, the latch mechanism, and the lock mechanism, thereby solving the problem of small structural space and difficult layout of the door mechanism for Type I and smaller 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 respectively 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 the handle shaft 4 can rotate around the axis.

[0048] The operating handle 3, the latch driving rocker arm 5, the first locking rocker arm 6, the second locking 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] The latch driving rocker arm 5 comprises 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 swing rod 12 through the connecting rod 11 , and the lock retainer double ear 72 is hinged with the lock retainer 8 .

[0051] The stopping rocker arm 9 has a closing position stopping nail 91 and an opening position stopping nail 92 , and the closing position stopping nail 91 and the opening position stopping nail 92 cooperate with the closing position limiting block 101 and the opening position limiting block 102 of the limiting support 10 respectively.

[0052] The lock retainer 8 comprises a lock retainer piston rod 81, a lock retainer spring 82 and a lock retainer outer cylinder 83. The lock retainer piston rod 81 is arranged on the inner side of the lock retainer outer cylinder 83, and the two are slidably connected. The lock retainer spring 82 is arranged on the outer side of the lock retainer outer cylinder 83 to provide a buffer force for the lock retainer piston rod 81 and the lock retainer outer cylinder 83. The upper end of the lock retainer 8 is hinged on the lock retainer double ears 72 of the second lock rocker arm 7, and the lower end thereof is hinged on 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 rocker 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 on 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 latch rollers 133. The latch cranks 132 are arranged at both ends of the latch shaft 131, and a latch roller 133 is arranged at the end of each latch crank 132. The latch 13 is hinged to the door structure 2 through a latch rocker 15 and a latch retainer 16.

[0056] The groove-type driving rocker arm 14 is fixedly mounted on the latch shaft 131, and includes a first lock key 141, a first retainer double ears 142 and a groove-type fork ear 143. The first lock key 141, the first retainer double ears 142 and the groove-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 rod 12 when the latch 13 rotates. The first retainer double ears 142 are connected to the latch retainer 16, and the groove-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 second retainer ears 152 . The second lock key 151 can cooperate with the lock boss 121 of the rocker rod 12 when the latch 13 rotates, and the second retainer ears 152 are connected to the latch retainer 16 .

[0058] The latch holder 16 comprises a latch holder piston rod 161, a latch holder spring 162 and a latch holder outer cylinder 163. The latch holder piston rod 161 is arranged inside the latch holder outer cylinder 163, and the two can slide relative to each other. The latch holder spring 162 is sleeved on the inside of the latch holder outer cylinder 163. The latch holder 16 is composed of two parts, the upper ends of which are respectively hinged on the first retainer double ears 142 and the second retainer double ears 152, and the lower ends of which are both hinged on the door structure 2.

[0059] The latch groove 17 has a roller supporting profile 171 . The two latch grooves 17 are respectively fixedly disposed on two sides of the door frame structure 1 , 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 is respectively engaged with the first lock key 141 of the slot-type driving rocker arm 14 and the second lock key 151 of the latch rocker arm 15, 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 is in contact 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, when the hatch is opened, the operating handle 3 is rotated counterclockwise outward and upward, driving the handle shaft 4, the latch driving rocker arm 5, the first locking rocker arm 6, the second locking rocker arm 7, and the stop rocker arm 9 to rotate counterclockwise synchronously. The first locking rocker arm 6 and the second locking rocker arm 7 pull the connecting rod 11 to move, driving the swing rod 12 to rotate clockwise around its lower end rotation axis; when the roller 52 of the latch driving rocker arm 5 moves to contact the grooved fork ear 143 of the grooved driving rocker arm 14, the lock boss 121 of the swing rod 12 is disengaged from the first lock key 141 of the grooved driving 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 continuously 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 clockwise, 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 supporting profile 171 of the latch groove 17, and the roller supporting profile 171 restricts the latch roller 133 from moving downward, driving the latch shaft 131 to move upward relative to the latch roller 133, thereby 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 profile 171, the hatch is unlatched, and the open position stop pin 92 of the stop rocker arm 9 is in contact 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 the present application have the following advantages:

[0064] 1) The drive of the bolt is realized by the bolt drive rocker arm fixed on the handle shaft, with 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 only connected through the latch drive rocker arm and the slot drive rocker arm, and the mechanism is 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 layout of door mechanisms for Type I and smaller doors.

[0067] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An aircraft cabin door latch and rocker lock mechanism, characterized in that: include: Door frame structure, door structure, operating handle, handle shaft, latch drive rocker arm, first lock rocker arm, second lock rocker arm, lock retainer, stop rocker arm, limit support, connecting rod, rocker arm, latch, slot drive rocker arm, latch rocker arm, latch retainer 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 two 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 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; The two ends of the lock retainer 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 locking rocker arm and the second locking rocker arm through a connecting rod; The latch is hinged to the door structure via a latch rocker arm fixedly connected to the latch and a latch retainer hinged to the latch rocker arm; There are two latch slots, which are respectively fixedly arranged on two sides of the door frame structure.

2. The aircraft cabin door latch and rocker lock mechanism according to claim 1, characterized in that: The limit support has a closing position limit block and an opening position limit block, and the stopping rocker arm has a closing position stop pin and an opening position stop pin, and the closing position stop pin and the opening position stop pin cooperate with the closing position limit block and the opening position limit block respectively.

3. The aircraft cabin door latch and rocker lock mechanism according to claim 2, characterized in that: The latch driving rocker arm comprises a double-ear rocker arm and a roller arranged on the double-ear rocker arm. When the latch driving rocker arm rotates, the roller can cooperate with the groove-type driving rocker arm.

4. The aircraft cabin door latch and rocker lock mechanism according to claim 3, characterized in that: The second lock rocker arm includes a connecting rod double ear and a lock retainer double ear, wherein the connecting rod double ear is connected to the swing rod through a connecting rod, and the lock retainer is hinged on the lock retainer double ear.

5. The aircraft cabin door latch and rocker lock mechanism according to claim 4, characterized in that: The latch comprises a latch shaft, a latch crank and a latch roller. There are two latch cranks and two latch rollers. The latch cranks are arranged at two ends of the latch shaft, and a latch roller is arranged at the end of each latch crank.

6. The aircraft cabin door latch and rocker lock mechanism according to claim 5, characterized in that: The groove-type driving rocker arm is fixedly installed on the latch shaft, and the groove-type driving rocker arm includes a first lock key, a first retainer double ears 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 ears are connected to the latch retainer, and the groove-type fork ear cooperates with the roller of the latch driving rocker arm.

7. The aircraft cabin door latch and rocker lock mechanism according to claim 6, wherein: 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.

8. The aircraft cabin door latch and rocker lock mechanism according to claim 7, wherein: The latch groove has a roller support profile, and the latch roller of the latch is arranged in the roller support profile.

9. The aircraft cabin door latch and rocker lock mechanism according to claim 8, wherein: 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, and the lock retainer keeps the rocker arm in the locked position 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.

10. The aircraft cabin door latch and rocker lock mechanism according to claim 8, wherein: When the hatch is opened, the operating handle is rotated counterclockwise outward and upward to drive the handle shaft, the latch driving 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 the rotating shaft at the lower end; when the roller of the latch driving rocker arm moves to contact the grooved fork ear of the grooved driving rocker arm, the lock boss of the rocker arm disengages from the first lock key of the grooved driving rocker arm and the second lock key of the latch rocker arm, and the hatch is unlocked.

11. The aircraft cabin door latch and rocker lock mechanism according to claim 8, wherein: Continue to rotate the operating handle counterclockwise outward and upward, 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 supporting surface of the latch groove, and the roller supporting surface limits the downward movement of the latch roller, driving the latch shaft to move upward relative to the latch roller, thereby driving the cabin door structure to move upward relative to the door frame structure. When the latch roller moves to the right end of the roller supporting surface, the cabin door is unlatched, and the open position stop pin of the stop rocker arm is in contact 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, and the latch retainer provides an upward force to keep the latch in the unlatched state, at this time, the cabin door is opened outward.

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