Assembly tool for aircraft door universal latch
By designing assembly fixtures for multi-positioning components and drill jig components, the problems of part errors and high costs in the manufacturing and assembly of aircraft door universal latch mechanisms were solved, achieving efficient, low-cost assembly and ensuring synchronization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI SHANGFEI AIRCRAFT EQUIP MFG
- Filing Date
- 2025-05-27
- Publication Date
- 2026-07-21
AI Technical Summary
The manufacturing and assembly of aircraft door universal latch mechanisms in the existing technology suffer from problems such as large manufacturing tolerances of parts, high costs, asynchronous movement, and large clearance of the mechanism.
An assembly fixture comprising multiple positioning components and a drill jig assembly was designed. By eliminating manufacturing errors of parts through step-by-step segmented positioning, it is applicable to the positioning, drilling, and assembly of different universal latches, reducing the precision requirements of parts and ensuring synchronous rotation.
It reduces the manufacturing cost of parts, improves the manufacturing precision of parts, ensures that the rotational synchronization and yaw clearance of the latch shaft meet the requirements, and is easy to operate and highly adaptable.
Smart Images
Figure CN224526043U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aircraft cabin door manufacturing technology, and in particular to an assembly tooling for an aircraft cabin door universal latch. Background Technology
[0002] The assembly and manufacturing process of aircraft cabin doors involves the assembly of different latch structures, among which the manufacturing and assembly of the universal latch mechanism is the most difficult to meet the engineering and technical requirements.
[0003] The universal latch mechanism of a traditional hatch usually involves tightening the manufacturing tolerances of the universal joint 30, coupling 10, and latch shaft 20. The manufacturing accuracy of the universal latch mechanism is ensured by manufacturing the parts, and the cumulative error at both ends of the universal latch mechanism is solved by leaving a margin for drilling the connecting rod 40 and the sensor shaft 50. This results in higher manufacturing costs for the parts and causes problems such as asynchronous movement of the latch shaft and large clearance of the mechanism. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide an assembly tooling for aircraft cabin door universal latches that is simple in structure, easy to operate, and suitable for positioning, drilling, assembly and inspection of different universal latches.
[0005] The technical solution adopted by this utility model to solve its technical problem is: an assembly tooling for a universal latch for an aircraft cabin door, including a base plate and a first positioning component, a second positioning component, a third positioning component, a fourth positioning component, a fifth positioning component, a sixth positioning component, and a drill jig assembly mounted on the base plate; the first positioning component is in multiple sets and is arranged at intervals along the lateral direction; the second and third positioning components are also in multiple sets and are arranged at staggered intervals along the lateral direction, with a second or third positioning component disposed between adjacent first positioning components; the fourth and fifth positioning components are respectively disposed at both ends of the base plate; the sixth positioning component is disposed between the first and second positioning components; the drill jig assembly is disposed between the first and third positioning components, between the first and fourth positioning components, and between the first and fifth positioning components.
[0006] Furthermore, the first positioning component includes a first positioning plate, a pressure block, and a first positioning pin. The first positioning plate is mounted on a base plate, and a first positioning groove is formed in the center of the top of the first positioning plate. The pressure block is positioned above the first positioning plate, with one end of the pressure block hinged to one end of the first positioning plate, and the other end of the pressure block connected to the other end of the first positioning plate via the first positioning pin. The pressure block presses the coupling into the first positioning groove.
[0007] Furthermore, the second positioning component includes a support plate and a second positioning pin. The support plate is mounted on the base plate, and a second positioning hole is provided at the top of the support plate. One end of the second positioning pin passes through the first positioning plate and the latch shaft and is inserted into the second positioning hole.
[0008] Furthermore, the third positioning component includes a side plate and a third positioning pin. The side plate is mounted on the base plate, and the third positioning pin is mounted on the top of the side plate. The end of the third positioning pin away from the side plate is inserted into the universal joint.
[0009] Furthermore, the fourth positioning component includes a fourth positioning plate and a fourth positioning pin. The fourth positioning plate is installed at one end of the base plate, and a fourth positioning hole is opened at the center of the top of the fourth positioning plate. The bottom end of the fourth positioning pin passes through the connecting rod and is inserted into the fourth positioning hole.
[0010] Furthermore, the fifth positioning component is a fifth positioning plate, which is installed at the other end of the base plate. A fifth positioning groove is provided at the top of the fifth positioning plate, and the fifth positioning groove positions the sensor shaft.
[0011] Furthermore, the sixth positioning component is a plug, and a sixth positioning groove is provided at the center of the bottom end of the plug, the sixth positioning groove positioning the heading of the coupling and the latch shaft.
[0012] Furthermore, the stopper includes multiple standard stoppers and several adjusting stoppers, wherein the thickness of the standard stoppers is 2 mm and the thickness of the adjusting stoppers is between 1.7 and 2.3 mm.
[0013] Furthermore, the drill jig assembly includes a template and a bushing, the template being mounted on a base plate and the bushing being disposed at the top of the template.
[0014] Furthermore, both the first positioning groove and the fifth positioning groove are V-shaped.
[0015] The beneficial effects of this utility model are:
[0016] (1) This utility model uses a first positioning component, a second positioning component, a third positioning component, a fourth positioning component, a fifth positioning component, and a sixth positioning component to position the coupling, the latch shaft, the universal joint, the connecting rod, the sensor shaft, and the heading of the coupling and the latch shaft, respectively. Combined with the drilling jig component, the universal latch can be drilled, assembled, and inspected. By positioning and reaming the holes in stages, the manufacturing error of the parts is eliminated. The requirements for the manufacturing precision of the parts are not high, the manufacturing cost of the parts is reduced, the rotation synchronization of the latch shaft is guaranteed, and the heading clearance meets the requirements. The structure is simple and the operation is convenient.
[0017] (2) This utility model can adapt to different universal latches by using the V-shaped first and fifth positioning grooves, increasing or decreasing the number of plugs, and replacing different bushings, and is highly practical. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a front view of the present invention;
[0021] Figure 3 This is a schematic diagram of the first positioning component in this utility model;
[0022] Figure 4 This is a schematic diagram of the second positioning component in this utility model;
[0023] Figure 5 This is a schematic diagram of the third positioning component in this utility model;
[0024] Figure 6 This is a schematic diagram of the fourth positioning component in this utility model;
[0025] Figure 7 This is a schematic diagram of the fifth positioning component in this utility model;
[0026] Figure 8 This is a schematic diagram of the sixth positioning component in this utility model;
[0027] Figure 9 This is a schematic diagram of the drill jig assembly in this utility model.
[0028] In the diagram: 10, coupling; 20, latch shaft; 30, universal joint; 40, connecting rod; 50, sensor shaft; 100, base plate; 200, first positioning assembly; 210, first positioning plate; 211, first positioning groove; 220, pressure block; 230, first positioning pin; 300, second positioning assembly; 310, support plate; 311, second positioning hole; 320, second positioning pin; 400, third positioning assembly; 410, side plate; 420, third positioning pin; 500, fourth positioning assembly; 510, fourth positioning plate; 511, fourth positioning hole; 520, fourth positioning pin; 600, fifth positioning assembly; 610, fifth positioning groove; 700, sixth positioning assembly; 710, sixth positioning groove; 800, drill jig assembly; 810, template; 820, bushing; 900, balance nut. Detailed Implementation
[0029] The present invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0030] like Figure 1 and Figure 2 As shown, an assembly fixture for an aircraft cabin door universal latch includes a base plate 100 and a first positioning component 200, a second positioning component 300, a third positioning component 400, a fourth positioning component 500, a fifth positioning component 600, a sixth positioning component 700, and a drill jig assembly 800 mounted on the base plate 100. The first positioning components 200 are in multiple sets, spaced laterally. The second positioning components 300 and 400 are also in multiple sets, staggered laterally, with a second positioning component 300 or a third positioning component 400 positioned between adjacent first positioning components 200. The fourth positioning components 500 and 600 are respectively positioned at both ends of the base plate 100. The sixth positioning component 700 is positioned between the first positioning components 200 and the second positioning components 300. The drill jig assembly 800 is positioned between the first positioning components 200 and the third positioning components 400, between the first positioning components 200 and the fourth positioning components 500, and between the first positioning components 200 and the fifth positioning components 600. Specifically, the fourth positioning component 500 is located at the right end of the base plate 100; the fifth positioning component 600 is located at the left end of the base plate 100; a balance nut 900 is installed at the bottom of the base plate 100, and the deviation between the worktable (not shown in the figure) and the base plate 100 is eliminated by adjusting the balance nut 900, so as to support the base plate 100.
[0031] The first positioning component 200, the second positioning component 300, the third positioning component 400, the fourth positioning component 500, the fifth positioning component 600, and the sixth positioning component 700 respectively position the coupling 10, the latch shaft 20, the universal joint 30, the connecting rod 40, the sensor shaft 50, and the heading of the coupling 10 and the latch shaft 20. Combined with the drill jig component 800, the universal latch can be drilled, assembled, and inspected. By eliminating manufacturing errors of parts through step-by-step segmented positioning and reaming, the requirements for the manufacturing precision of parts are not high, the manufacturing cost of parts is reduced, the rotation synchronization of the latch shaft 20 is guaranteed, and the heading clearance meets the requirements. The structure design is simple and the operation is convenient.
[0032] like Figure 1 and Figure 3As shown, the first positioning assembly 200 includes a first positioning plate 210, a pressure block 220, and a first positioning pin 230. The first positioning plate 210 is mounted on the base plate 100. A first positioning groove 211 is formed in the center of the top of the first positioning plate 210. The pressure block 220 is positioned above the first positioning plate 210. One end of the pressure block 220 is hinged to one end of the first positioning plate 210, and the other end of the pressure block 220 is connected to the other end of the first positioning plate 210 through the first positioning pin 230. The pressure block 220 presses the coupling 10 into the first positioning groove 211. Specifically, the first positioning plate 210 is longitudinally mounted on the base plate 100; the pressure block 220 is longitudinally positioned above the first positioning plate 210; and the first positioning groove 211 is V-shaped.
[0033] Positioning is achieved by combining the V-shaped first positioning groove 211 with the pressure block 220, which is suitable for positioning couplings 10 with diameters from 15mm to 40mm.
[0034] like Figure 1 and Figure 4 As shown, the second positioning assembly 300 includes a support plate 310 and a second positioning pin 320. The support plate 310 is mounted on the base plate 100, and a second positioning hole 311 is formed at the top of the support plate 310. One end of the second positioning pin 320 passes through the first positioning plate 210 and the latch shaft 20 and is inserted into the second positioning hole 311. Specifically, the support plate 310 is mounted laterally on the base plate 100; the second positioning pin 320 passes laterally through the first positioning plate 210 and the latch shaft 20.
[0035] like Figure 1 and Figure 5 As shown, the third positioning assembly 400 includes a side plate 410 and a third positioning pin 420. The side plate 410 is mounted on the base plate 100, and the third positioning pin 420 is mounted on the top of the side plate 410. The end of the third positioning pin 420 away from the side plate 410 is inserted into the universal joint 30. Specifically, the side plate 410 is mounted laterally on one side of the base plate 100; there are two third positioning pins 420, which are mounted longitudinally on the top of the side plate 410.
[0036] like Figure 1 and Figure 6 As shown, the fourth positioning component 500 includes a fourth positioning plate 510 and a fourth positioning pin 520. The fourth positioning plate 510 is installed at one end of the base plate 100. A fourth positioning hole 511 is opened in the middle of the top of the fourth positioning plate 510. The bottom end of the fourth positioning pin 520 passes through the connecting rod 40 and is inserted into the fourth positioning hole 511.
[0037] like Figure 1 and Figure 7As shown, the fifth positioning component 600 is a fifth positioning plate, which is installed at the other end of the base plate 100. The top of the fifth positioning plate has a fifth positioning groove 610, which positions the sensor shaft 50. Specifically, the fifth positioning groove 610 is V-shaped.
[0038] like Figure 1 and Figure 8 As shown, the sixth positioning component 700 is a stopper plate, and a sixth positioning groove 710 is formed in the middle of the bottom end of the stopper plate. The sixth positioning groove 710 positions the coupling 10 and the latch shaft 20 in the correct direction. Specifically, the stopper plate includes multiple standard stopper plates and several adjusting stopper plates. The thickness of the standard stopper plates is 2mm, and the thickness of the adjusting stopper plates is between 1.7-2.3mm. The sixth positioning groove 710 is U-shaped.
[0039] Adjust the number of standard plugs by 2mm depending on the different universal latches, and select adjusting plugs of 1.7-2.3mm (0.1mm per level).
[0040] like Figure 1 and Figure 9 As shown, the drill jig assembly 800 includes a template 810 and a bushing 820. The template 810 is mounted on the base plate 100, and the bushing 820 is disposed at the top of the template 810. Specifically, the template 810 is longitudinally mounted on one side of the base plate 100; the bushing 820 is longitudinally disposed at the top of the template 810.
[0041] By using the V-shaped first positioning groove 211 and fifth positioning groove 610, increasing or decreasing the number of plugs, and replacing different bushings 820, it can adapt to different universal latches, making it highly practical.
[0042] In use, firstly, use the first positioning component 200 and the second positioning component 300 to position the coupling 10 and the latch shaft 20. Then, use the plug plate to position the coupling 10 and the latch shaft 20 in the correct direction. Finally, use the pressure block 220 to tighten the coupling 10 and the latch shaft 20. Use the fourth positioning component 500 to position the connecting rod 40. Use the fifth positioning component 600 to position the sensor shaft 50. Use the third positioning component 400 to position the universal joint 30. Check the positioning of the latch shaft 20, universal joint 30, connecting rod 40, and sensor shaft 50 on the universal latch, as well as the universal latch's wobble and clearance. If the universal latch mechanism wobbles or has excessive clearance, replace it with a larger third positioning pin 420 or readjust the pressure of the pressure block 220 until the universal latch wobbles and clearance are within acceptable limits. Using the drill jig assembly 800, sequentially enlarge and ream the connection holes of coupling 10 and latch shaft 20, sensor shaft 50 and coupling 10, and connecting rod 40 and coupling 10 to the final holes. Remove the burrs from the universal latch sequentially. Connect coupling 10 to latch shaft 20, sensor shaft 50 to coupling 10, connecting rod 40 to coupling 10, and universal joint 30 to coupling 10 using fasteners. Remove the third locating pin 420 and pressure block 220, rotate connecting rod 40, and check if the rotation of sensor shaft 50 is synchronized. Pull connecting rod 40 axially to check if there is directional play in sensor shaft 50. If play exists, insert the third locating pin 420 and plug sequentially from front to back, and check the specific location of the play. Then eliminate the play until the rotation of sensor shaft 50 is synchronized after removing the third locating pin 420 and pressure block 220, and the directional play meets the requirements.
[0043] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.
Claims
1. An assembly tooling for a universal latch for an aircraft cabin door, characterized in that: The system includes a base plate (100) and a first positioning component (200), a second positioning component (300), a third positioning component (400), a fourth positioning component (500), a fifth positioning component (600), a sixth positioning component (700), and a drill jig assembly (800) mounted on the base plate (100). The first positioning component (200) is in multiple sets, spaced apart laterally. The second positioning component (300) and the third positioning component (400) are also in multiple sets, staggered laterally, with a second positioning component positioned between adjacent first positioning components (200). (300) or the third positioning component (400); the fourth positioning component (500) and the fifth positioning component (600) are respectively disposed at both ends of the base plate (100); the sixth positioning component (700) is disposed between the first positioning component (200) and the second positioning component (300); the drill jig assembly (800) is respectively disposed between the first positioning component (200) and the third positioning component (400), between the first positioning component (200) and the fourth positioning component (500), and between the first positioning component (200) and the fifth positioning component (600).
2. The assembly tooling for the universal latch of an aircraft door according to claim 1, characterized in that: The first positioning component (200) includes a first positioning plate (210), a pressure block (220), and a first positioning pin (230). The first positioning plate (210) is mounted on the base plate (100). A first positioning groove (211) is provided at the center of the top of the first positioning plate (210). The pressure block (220) is positioned above the first positioning plate (210). One end of the pressure block (220) is hinged to one end of the first positioning plate (210). The other end of the pressure block (220) is connected to the other end of the first positioning plate (210) through the first positioning pin (230). The pressure block (220) presses the coupling (10) into the first positioning groove (211).
3. The assembly tooling for the universal latch of an aircraft cabin door according to claim 2, characterized in that: The second positioning component (300) includes a support plate (310) and a second positioning pin (320). The support plate (310) is mounted on the base plate (100). A second positioning hole (311) is provided at the top of the support plate (310). One end of the second positioning pin (320) passes through the first positioning plate (210) and the latch shaft (20) and is inserted into the second positioning hole (311).
4. The assembly tooling for the universal latch of an aircraft door according to claim 1, characterized in that: The third positioning component (400) includes a side plate (410) and a third positioning pin (420). The side plate (410) is mounted on the base plate (100), and the third positioning pin (420) is mounted on the top of the side plate (410). The end of the third positioning pin (420) away from the side plate (410) is inserted into the universal joint (30).
5. The assembly tooling for the universal latch of an aircraft door according to claim 1, characterized in that: The fourth positioning component (500) includes a fourth positioning plate (510) and a fourth positioning pin (520). The fourth positioning plate (510) is installed at one end of the base plate (100). A fourth positioning hole (511) is provided at the center of the top of the fourth positioning plate (510). The bottom end of the fourth positioning pin (520) passes through the connecting rod (40) and is inserted into the fourth positioning hole (511).
6. The assembly tooling for the universal latch of an aircraft cabin door according to claim 2, characterized in that: The fifth positioning component (600) is a fifth positioning plate, which is installed at the other end of the base plate (100). The top of the fifth positioning plate is provided with a fifth positioning groove (610), which positions the sensor shaft (50).
7. The assembly tooling for the universal latch of an aircraft door according to claim 1, characterized in that: The sixth positioning component (700) is a plug, and a sixth positioning groove (710) is provided at the middle of the bottom end of the plug. The sixth positioning groove (710) positions the coupling (10) and the latch shaft (20) in the direction of travel.
8. The assembly tooling for the universal latch of an aircraft door according to claim 7, characterized in that: The stopper includes multiple standard stoppers and several adjustable stoppers. The thickness of the standard stoppers is 2 mm, and the thickness of the adjustable stoppers is between 1.7 and 2.3 mm.
9. The assembly tooling for the universal latch of an aircraft door according to claim 1, characterized in that: The drill jig assembly (800) includes a template (810) and a bushing (820). The template (810) is mounted on the base plate (100), and the bushing (820) is disposed on the top of the template (810).
10. The assembly tooling for the universal latch of an aircraft door according to claim 6, characterized in that: Both the first positioning groove (211) and the fifth positioning groove (610) are V-shaped.