Double-bolt lock mechanism

Abstract

The invention provides a double-bolt lock mechanism, and belongs to the field of aircraft cabin door locks, the double-bolt lock mechanism comprises a transmission mechanism, two bolt assemblies and a spring boosting assembly; wherein the transmission mechanism comprises a handle, a driving rocker arm, a driven rocker arm and a mounting seat, the mounting seat is fixedly mounted on the cabin door structure, the driving rocker arm and the driven rocker arm are pivoted on the mounting seat, the driving rocker arm is respectively pivoted with one plug pin assembly and the driven rocker arm, and the driven rocker arm is respectively pivoted with the driving rocker arm and the other plug pin assembly. The handle is fixedly connected with the driving rocker arm; the plug pin assembly comprises a plug pin support, a plug pin, a lock ring support and a lock ring, the plug pin support and the lock ring support are fixed to the cabin door structure, the lock ring is fixed to the lock ring support to form a plug pin limiting structure, and the plug pin is installed on the plug pin support and can slide relative to the plug pin support; the spring boosting assembly comprises a spring booster and a spring support, one end of the spring booster is hinged to the driving rocker arm, and the other end of the spring booster is hinged to the spring support.

Description

Technical Field

[0001] The present invention relates to the field of aircraft cabin door locks, and in particular to a double latch lock mechanism. Background Art

[0002] To ensure the reliability and stability of the locking, aircraft doors in pressurized areas or other important parts are usually locked with double or multiple locking points. Currently, multi-locking point mechanisms are mostly implemented in the form of rotating shafts, rocker arms, pull rods, and latches. This method takes up a lot of space and is heavy, so it is not suitable for small doors with limited space. Summary of the invention

[0003] The object of the present application is to provide a double bolt lock mechanism to solve or alleviate at least one problem in the background technology.

[0004] The technical solution of the present application is: a double latch lock mechanism, comprising: a transmission mechanism, two latch assemblies and a spring assist assembly;

[0005] Wherein, the transmission mechanism comprises a handle, an active rocker arm, a slave rocker arm and a mounting seat, the mounting seat is fixedly mounted on the door structure, the active rocker arm and the slave rocker arm are pivotally connected to the mounting seat, the two ends of the active rocker arm are respectively pivotally connected to one of the latch assemblies and the slave rocker arm, the two ends of the slave rocker arm are respectively pivotally connected to the active rocker arm and the other latch assembly, and the handle is fixedly connected to the active rocker arm;

[0006] The latch assembly comprises a latch support, a latch, a lock ring support and a lock ring, wherein the latch support is fixed to the door structure, the lock ring support is fixed to the edge of the door structure, the lock ring is fixed to the lock ring support to form a limit structure for the latch, the latch is mounted on the latch support and can slide relative to the latch support and be inserted into the lock ring, wherein a cylindrical pin is provided at a position on the latch that is adapted to the active rocker arm or the passive rocker arm, and the cylindrical pin is inserted into a bar hole corresponding to the active rocker arm or the passive rocker arm;

[0007] The spring booster assembly includes a spring booster and a spring support. One end of the spring booster is hinged to the active rocker arm and the other end is hinged to the spring support. When unlocking, the spring support is supported on the mouth frame of the hatch structure to keep the hatch in the unlocked position, and when locking, the hatch is kept in the locked position.

[0008] In an optional embodiment of the present application, a circular hole is provided on the side where the active rocker arm is connected to the slave rocker arm, a cylindrical pin is provided in the circular hole, and a first strip hole is provided on the side where the active rocker arm is connected to the latch assembly.

[0009] In an optional embodiment of the present application, a second strip hole is provided on the side where the slave rocker arm is connected to the master rocker arm, and a third strip hole is provided on the side where the slave rocker arm is connected to the latch assembly.

[0010] In an optional embodiment of the present application, the shape of the strip holes on the active rocker arm and the slave rocker arm matches the length and rotation angle of the rocker arm.

[0011] In an optional implementation manner of the present application, the handle, the active rocker arm and the passive rocker arm are machined parts made of aluminum alloy.

[0012] In an optional embodiment of the present application, bushings are provided on the cylindrical pin shafts between the active rocker arm and the passive rocker arm, the passive rocker arm and the latch, and the active rocker arm and the latch, so that the friction between the two is rolling friction.

[0013] In an optional embodiment of the present application, grease nozzles are provided at both ends of the latch support, and the latch is repeatedly lubricated through the grease nozzles to prevent sticking.

[0014] In an optional implementation manner of the present application, the latch, lock ring and lock ring support are stainless steel machined parts, and the latch support is an aluminum alloy machined part.

[0015] In an optional implementation manner of the present application, the spring support is an aluminum alloy machined part.

[0016] The double latch lock mechanism provided by the present application can meet the functional requirements, has reliable locking capability, and at the same time has a compact structure, a small number of parts, and good economy and assembly performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 Schematic diagram of the double latch lock mechanism of the present application.

[0019] Figure 2 Schematic diagram of the active rocker arm of this application.

[0020] Figure 3 Schematic diagram of the driven rocker arm of this application. DETAILED DESCRIPTION

[0021] 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.

[0022] In order to overcome the problems of complex structure and large space occupied by the multi-locking point mechanism in the prior art, the present application completes a double latch lock mechanism through a connecting rod mechanism with oblong holes, which greatly reduces the number of parts and saves cabin door space.

[0023] like Figure 1 As shown, the double latch lock mechanism provided by the present application includes a transmission mechanism 10 , two latch assemblies 20 and a spring assist assembly 30 .

[0024] The transmission mechanism 10 includes a handle 11, an active rocker arm 12, a slave rocker arm 13 and a mounting seat 14. The mounting seat 14 is fixedly mounted on the door structure 40. The active rocker arm 12 and the slave rocker arm 13 are pivotally connected to the mounting seat 14 at approximately the middle position, and the two rockers can rotate relative to the mounting seat 14. The two ends of the active rocker arm 12 are pivotally connected to a latch assembly 20 and the slave rocker arm 13, respectively, and the two ends of the slave rocker arm 13 are pivotally connected to the active rocker arm 12 and another latch assembly 20, respectively. The handle 11 is mounted at the rotating shaft between the active rocker arm 12 and the mounting seat 14, and is fixed to the active rocker arm 12. The latch assembly 20 pivotally connected to the active rocker arm 12 and the slave rocker arm 13 can be driven by the handle 11.

[0025] like Figure 2 As shown, a circular hole 121 is provided on one side where the active rocker arm 12 is connected to the slave rocker arm 13 , and a cylindrical pin shaft can be arranged in the circular hole 121 . A first strip hole 122 is provided on the side where the active rocker arm 12 is connected to the latch assembly 20 .

[0026] like Figure 3 As shown, a second strip hole 131 is provided on the side where the slave rocker arm 13 is connected to the master rocker arm, and a third strip hole 132 is provided on the side where the slave rocker arm 13 is connected to the latch assembly 20 .

[0027] It should be noted that the circular hole 121 on the side where the active rocker arm 12 and the slave rocker arm 13 are connected and the second strip hole 131 on the side where the slave rocker arm 13 and the active rocker arm are connected can be swapped, that is, the second strip hole can be set on the side where the active rocker arm 12 and the slave rocker arm 13 are connected, and the circular hole can be set on the side where the slave rocker arm 13 and the active rocker arm are connected.

[0028] In the present application, the shapes of the strip holes on the active rocker arm 12 and the passive rocker arm 13 match the length and rotation angle of the rocker arm 55 .

[0029] In some embodiments of the present application, the handle 11, the active rocker arm 12 and the passive rocker arm 13 are all machined parts made of 7050 aluminum alloy.

[0030] The latch assembly 20 includes a latch support 21, a latch 22, a lock ring support 23 and a lock ring 24. The latch support 21 is fixed to the door structure 40, the lock ring support 23 is fixed to the edge of the door structure 40, and the lock ring 24 is fixed to the lock ring support 23, which is used to form a limit structure for the latch 22. The latch 22 is installed on the latch support 21, and it can slide relative to the latch support 21 and be inserted into the lock ring 24. A cylindrical pin is provided at the position where the latch 22 is adapted to the active rocker arm 12 or the passive rocker arm 13, and the cylindrical pin is inserted into the corresponding bar hole of the active rocker arm 12 or the passive rocker arm 13.

[0031] In a preferred embodiment of the present application, bushings may be provided on the cylindrical pins between the active rocker arm 12 and the slave rocker arm 13, the slave rocker arm 13 and the latch 22, and the active rocker arm 12 and the latch 22, so that the friction between the two is rolling friction.

[0032] In some embodiments of the present application, grease nozzles are provided at both ends of the latch support 21, and the latch 22 is repeatedly lubricated through the grease nozzles to prevent sticking.

[0033] In some embodiments of the present application, the latch 22, the lock ring 24 and the lock ring support 23 can be stainless steel machined parts, while the latch support 21 is a 7050 aluminum alloy machined part with mature processing technology, high processing reliability, and easy guarantee of part size and tolerance.

[0034] The spring booster assembly 30 includes a spring booster 31 and a spring support 32. One end of the spring booster 31 is hinged to the active rocker arm 12, and the other end is hinged to the spring support 32. When unlocking, the spring support 32 is supported on the mouth frame of the hatch structure 10 to keep the hatch in the unlocked position, and when locking, the hatch is kept in the locked position.

[0035] In some embodiments of the present application, the spring support 32 is a 7050 aluminum alloy machined part.

[0036] The movement process of the double bolt lock mechanism of the present application is as follows:

[0037] When the hatch is unlocked, the handle 11 is rotated counterclockwise in the direction P, thereby rotating the active rocker arm 12, thereby driving the slave rocker arm 13 to rotate a corresponding angle, and the latches 22 on both sides are locked at the same time under the drive of the active rocker arm 12 and the slave rocker arm 13; the movement is opposite when locking.

[0038] The double latch lock mechanism provided by the present application can meet the functional requirements, has reliable locking capability, and at the same time has a compact structure, a small number of parts, and good economy and assembly performance.

[0039] 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. A double latch lock mechanism, characterized in that: include: A transmission mechanism, two latch assemblies and a spring assist assembly; Wherein, the transmission mechanism comprises a handle, an active rocker arm, a slave rocker arm and a mounting seat, the mounting seat is fixedly mounted on the door structure, the active rocker arm and the slave rocker arm are pivotally connected to the mounting seat, the two ends of the active rocker arm are respectively pivotally connected to one of the latch assemblies and the slave rocker arm, the two ends of the slave rocker arm are respectively pivotally connected to the active rocker arm and the other latch assembly, and the handle is fixedly connected to the active rocker arm; The latch assembly comprises a latch support, a latch, a lock ring support and a lock ring, wherein the latch support is fixed to the door structure, the lock ring support is fixed to the edge of the door structure, the lock ring is fixed to the lock ring support to form a limit structure for the latch, the latch is mounted on the latch support and can slide relative to the latch support and be inserted into the lock ring, wherein a cylindrical pin is provided at a position on the latch that is adapted to the active rocker arm or the passive rocker arm, and the cylindrical pin is inserted into a bar hole corresponding to the active rocker arm or the passive rocker arm; The spring booster assembly includes a spring booster and a spring support. One end of the spring booster is hinged to the active rocker arm and the other end is hinged to the spring support. When unlocking, the spring support is supported on the mouth frame of the hatch structure to keep the hatch in the unlocked position, and when locking, the hatch is kept in the locked position.

2. The double bolt lock mechanism according to claim 1, characterized in that: A circular hole is provided on the side where the active rocker arm is connected to the slave rocker arm, and a cylindrical pin is provided on the circular hole. A first strip hole is provided on the side where the active rocker arm is connected to the latch assembly.

3. The double bolt lock mechanism according to claim 2, characterized in that: A second strip hole is provided on the side where the slave rocker arm is connected to the master rocker arm, and a third strip hole is provided on the side where the slave rocker arm is connected to the latch assembly.

4. The double bolt lock mechanism according to claim 3, characterized in that: The shapes of the strip holes on the active rocker arm and the passive rocker arm match the length and rotation angle of the rocker arm.

5. The double bolt lock mechanism according to any one of claims 1 to 4, characterized in that: The handle, the active rocker arm and the passive rocker arm are aluminum alloy machined parts.

6. The double bolt lock mechanism according to claim 1, characterized in that: Bushings are arranged on the cylindrical pin shafts between the active rocker arm and the passive rocker arm, the passive rocker arm and the latch, and the active rocker arm and the latch, so that the friction between the two is rolling friction.

7. The double bolt lock mechanism according to claim 1, characterized in that: Oiling nozzles are arranged at both ends of the latch support, and the latch is repeatedly lubricated through the oiling nozzles to prevent it from getting stuck.

8. The double bolt lock mechanism according to claim 6 or 7, characterized in that: The latch, lock ring and lock ring support are stainless steel machined parts, and the latch support is an aluminum alloy machined part.

9. The double bolt lock mechanism according to claim 1, wherein: The spring support is an aluminum alloy machined part.

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