A double bolt lock mechanism

Abstract

The application provides a double-bolt lock mechanism, belonging to the field of aircraft cabin door locks, which comprises a transmission mechanism, two bolt assemblies and a spring booster assembly. The transmission mechanism comprises a handle, a driving rocker arm, a driven rocker arm and a mounting seat. The mounting seat is fixedly installed on a cabin door structure. The driving rocker arm and the driven rocker arm are pivotally connected to the mounting seat. The driving rocker arm is pivotally connected to one of the bolt assemblies and the driven rocker arm. The driven rocker arm is pivotally connected to the driving rocker arm and the other bolt assembly. The handle is fixedly connected to the driving rocker arm. The bolt assembly comprises a bolt support, a bolt, a lock ring support and a lock ring. The bolt support and the lock ring support are fixedly installed on the cabin door structure. The lock ring is fixedly installed on the lock ring support to form a bolt limiting structure. The bolt is installed on the bolt support and can slide relative to the bolt support. The spring booster assembly comprises a spring booster and a spring support. One end of the spring booster is hingedly connected to the driving rocker arm, and the other end is hingedly connected to the spring support.

Description

Technical Field

[0001] This application belongs to the field of aircraft cabin door locks, and specifically relates to a double-pin lock mechanism. Background Technology

[0002] To ensure the reliability and stability of locking, aircraft doors in pressurized areas or other critical locations often employ dual-point or multiple-point locking systems. Currently, multi-point locking mechanisms are mostly implemented using pivots, rocker arms, levers, or pins. This method occupies a large amount of space and is relatively heavy, making it unsuitable for small doors with limited space. Summary of the Invention

[0003] The purpose of this application is to provide a double-pin locking mechanism to solve or mitigate at least one of the problems in the prior art.

[0004] The technical solution of this application is: a double pin lock mechanism, comprising: a transmission mechanism, two pin assemblies and a spring-assisted assembly;

[0005] The transmission mechanism includes a handle, a main rocker arm, a driven rocker arm, and a mounting base. The mounting base is fixedly installed on the hatch structure. The main rocker arm and the driven rocker arm are pivotally connected to the mounting base. The two ends of the main rocker arm are pivotally connected to one of the pin assemblies and the driven rocker arm, respectively. The two ends of the driven rocker arm are pivotally connected to the main rocker arm and the other pin assembly, respectively. The handle is fixedly connected to the main rocker arm.

[0006] The latch assembly includes a latch support, a latch, a locking ring support, and a locking ring. The latch support is fixed to the hatch structure, the locking ring support is fixed to the edge of the hatch structure, and the locking ring is fixed to the locking ring support to form a limiting 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 locking ring. The latch has a cylindrical pin at a position adapted to the active rocker arm or the driven rocker arm, and the cylindrical pin is inserted into the corresponding slot of the active rocker arm or the driven rocker arm.

[0007] The spring-assisted assembly includes a spring booster and a spring support. One end of the spring booster is hinged to the main rocker arm, and the other end is hinged to the spring support. When unlocked, the spring support supports the hatch frame, keeping the hatch in the unlocked position. When locked, it keeps the hatch in the locked position.

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

[0009] In an optional embodiment of this application, a second strip hole is provided on the side where the driven rocker arm is connected to the main rocker arm, and a third strip hole is provided on the side where the driven rocker arm is connected to the pin assembly.

[0010] In an optional embodiment of this application, the shapes of the slots on the active rocker arm and the driven rocker arm are matched to the length and rotation angle of the rocker arm.

[0011] In an optional embodiment of this application, the handle, the active rocker arm, and the driven rocker arm are machined aluminum alloy parts.

[0012] In an optional embodiment of this application, bushings are provided on the cylindrical pins between the active rocker arm and the driven rocker arm, the driven rocker arm and the pin, and the active rocker arm and the pin, so that the friction between them is rolling friction.

[0013] In an optional embodiment of this application, oil nozzles are provided at both ends of the pin support to repeatedly lubricate the pin and prevent jamming.

[0014] In an optional embodiment of this application, the pin, locking ring, and locking ring support are stainless steel machined parts, and the pin support is an aluminum alloy machined part.

[0015] In an optional embodiment of this application, the spring support is a machined aluminum alloy part.

[0016] The double pin lock mechanism provided in this application can meet the functional requirements, has reliable locking capability, and is compact in structure with few parts, thus having good economy and assembly performance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions provided in this application, the accompanying drawings will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application.

[0018] Figure 1 This is a schematic diagram of the double pin lock mechanism of this application.

[0019] Figure 2 This is a schematic diagram of the active rocker arm of this application.

[0020] Figure 3 This is a schematic diagram of the rocker arm of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0022] To overcome the problems of complex structure and large space occupation of existing multi-locking mechanisms, this application completes a double pin lock mechanism through a linkage mechanism with an elongated hole, which greatly reduces the number of parts and saves door space.

[0023] like Figure 1 As shown, the double pin lock mechanism provided in this application includes a transmission mechanism 10, two pin assemblies 20, and a spring-assisted assembly 30.

[0024] The transmission mechanism 10 includes a handle 11, a primary rocker arm 12, a secondary rocker arm 13, and a mounting base 14. The mounting base 14 is fixedly mounted on the hatch structure 40. The primary rocker arm 12 and the secondary rocker arm 13 are pivotally connected to the mounting base 14 at approximately their midpoints, allowing the two rocker arms to rotate relative to the mounting base 14. The two ends of the primary rocker arm 12 are pivotally connected to a pin assembly 20 and the secondary rocker arm 13, respectively. The two ends of the secondary rocker arm 13 are pivotally connected to the primary rocker arm 12 and another pin assembly 20, respectively. The handle 11 is mounted at the pivot point between the primary rocker arm 12 and the mounting base 14, and is fixed to the primary rocker arm 12. The handle 11 can drive the pin assemblies 20 pivotally connected to the primary rocker arm 12 and the secondary rocker arm 13.

[0025] like Figure 2 As shown, the side where the active rocker arm 12 is connected to the driven rocker arm 13 is provided with a circular hole 121, in which a cylindrical pin can be installed. The side where the pin is connected to the pin assembly 20 is provided with a first strip hole 122.

[0026] like Figure 3 As shown, a second strip hole 131 is provided on the side of the rocker arm 13 that is connected to the main rocker arm, and a third strip hole 132 is provided on the side that is connected to the pin assembly 20.

[0027] It should be noted that the positions of the circular hole 121 on the side where the active rocker arm 12 connects to the passive rocker arm 13 and the second strip hole 131 on the side where the passive rocker arm 13 connects to the active rocker arm can be interchanged. That is, the second strip hole can be provided on the side where the active rocker arm 12 connects to the passive rocker arm 13, while the circular hole can be provided on the side where the passive rocker arm 13 connects to the active rocker arm.

[0028] In this application, the shapes of the slots on the active rocker arm 12 and the passive rocker arm 13 are matched to the length and rotation angle of the rocker arm 55.

[0029] In some embodiments of this application, the handle 11, the active rocker arm 12, and the driven 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 locking ring support 23, and a locking ring 24. The latch support 21 is fixed to the hatch structure 40, the locking ring support 23 is fixed to the edge of the hatch structure 40, and the locking ring 24 is fixed to the locking ring support 23, forming a limiting structure for the latch 22. The latch 22 is mounted on the latch support 21 and can slide relative to the latch support 21 and be inserted into the locking ring 24. The latch 22 is adapted to have a cylindrical pin at the position of the active rocker arm 12 or the driven rocker arm 13, which is inserted into the corresponding slotted hole of the active rocker arm 12 or the driven rocker arm 13.

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

[0032] In some embodiments of this application, oil nozzles are provided at both ends of the pin support 21 to repeatedly lubricate the pin 22 and prevent jamming.

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

[0034] The spring-assisted assembly 30 includes a spring booster 31 and a spring support 32. One end of the spring booster 31 is hinged to the main rocker arm 12, and the other end is hinged to the spring support 32. When unlocked, the spring support 32 supports the hatch frame of the hatch structure 10, keeping the hatch in the unlocked position. When locked, it keeps the hatch in the locked position.

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

[0036] The movement process of the double-pin lock mechanism in this application is as follows:

[0037] When the hatch is unlocked, the handle 11 is turned counterclockwise to the P direction, which in turn rotates the main rocker arm 12, thereby driving the driven rocker arm 13 to rotate at the corresponding angle. The pins 22 on both sides are locked simultaneously under the drive of the main rocker arm 12 and the driven rocker arm 13; the movements are opposite when locking.

[0038] The double pin lock mechanism provided in this application can meet the functional requirements, has reliable locking capability, and is compact in structure with few parts, thus having good economy and assembly performance.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A double-pin lock mechanism, characterized in that, include: Transmission mechanism, two pin assemblies and spring-assisted assembly; The transmission mechanism includes a handle, a main rocker arm, a driven rocker arm, and a mounting base. The mounting base is fixedly installed on the hatch structure. The main rocker arm and the driven rocker arm are pivotally connected to the mounting base. The two ends of the main rocker arm are pivotally connected to one of the pin assemblies and the driven rocker arm, respectively. The two ends of the driven rocker arm are pivotally connected to the main rocker arm and the other pin assembly, respectively. The handle is fixedly connected to the main rocker arm. The latch assembly includes a latch support, a latch, a locking ring support, and a locking ring. The latch support is fixed to the hatch structure, the locking ring support is fixed to the edge of the hatch structure, and the locking ring is fixed to the locking ring support to form a limiting 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 locking ring. The latch has a cylindrical pin at a position adapted to the active rocker arm or the driven rocker arm, and the cylindrical pin is inserted into the corresponding slot of the active rocker arm or the driven rocker arm. The spring-assisted assembly includes a spring booster and a spring support. One end of the spring booster is hinged to the main rocker arm, and the other end is hinged to the spring support. When unlocked, the spring support supports the hatch frame, keeping the hatch in the unlocked position. When locked, it keeps the hatch in the locked position.

2. The double-pin lock mechanism as described in claim 1, characterized in that, The active rocker arm is provided with a circular hole on the side where it connects to the driven rocker arm, and a cylindrical pin is provided in the circular hole. The active rocker arm is provided with a first strip hole on the side where it connects to the pin assembly.

3. The double-pin lock mechanism as described in claim 2, characterized in that, The side where the driven rocker arm connects to the main rocker arm has a second strip hole, and the side where the driven rocker arm connects to the pin assembly has a third strip hole.

4. The double-pin lock mechanism as described in claim 3, characterized in that, The shapes of the slots on the primary and secondary rocker arms are matched to the length and rotation angle of the rocker arms.

5. The double-pin lock mechanism as described in any one of claims 1 to 4, characterized in that, The handle, the main rocker arm, and the driven rocker arm are machined aluminum alloy parts.

6. The double-pin lock mechanism as described in claim 1, characterized in that, Bushings are provided on the cylindrical pins between the main rocker arm and the driven rocker arm, the driven rocker arm and the pin, and the main rocker arm and the pin, so that the friction between them is rolling friction.

7. The double-pin lock mechanism as described in claim 1, characterized in that, The pin support is equipped with grease nipples at both ends, which are used to repeatedly lubricate the pin and prevent it from getting stuck.

8. The double-pin lock mechanism as described in claim 6 or 7, characterized in that, The pin, locking ring, and locking ring support are stainless steel machined parts, and the pin support is an aluminum alloy machined part.

9. The double-pin lock mechanism as described in claim 1, characterized in that, The spring support is a machined aluminum alloy part.

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