Cabin door up-sliding type movement mechanism and installation method thereof

Abstract

The invention relates to the technical field of aeronautical manufacturing, and discloses a cabin door up-sliding type movement mechanism and an installation method thereof.The cabin door up-sliding type movement mechanism is characterized in that a three-dimensional assembly model capable of simulating assembly relations and spatial positions of all parts of the cabin door up-sliding type movement mechanism is constructed, and an upper sliding rail in the three-dimensional model is divided in a segmented mode; according to the method, a segmented model containing two segmented structures is formed, assembly simulation analysis is carried out on different segmented models under the preset simulation frequency, order difference data at the segmented positions of the two segmented structures can be obtained, and finally the segmented model with the order difference meeting the qualified rate requirement is selected as the segmented structure of the upper sliding rail. By combining the positions of the supporting assemblies of the upper sliding rail and the lower sliding rail, the upward sliding type movement mechanism of the cabin door is installed and positioned, the installation accuracy and stability can be ensured, and meanwhile the technical problems that after a multi-section sliding rail is installed in a cross-region mode, the overall position degree is difficult to control, and different structural parts are coordinated are solved; and smooth movement of the pulley system on the structure after final assembly is ensured.

Description

Technical Field

[0001] This invention relates to the field of aviation manufacturing technology, and discloses a door sliding motion mechanism and its installation method. Background Technology

[0002] Coordination between different components has always been a technical challenge for process engineers during structural assembly. How to reduce assembly difficulty while ensuring assembly accuracy meets design requirements is a key issue that process engineers need to focus on.

[0003] Taking the sliding door mechanism as an example, this mechanism mainly consists of two parts: a slide rail structure and a roller structure. The slide rail structure is located on the inner surface of the main structure and can be designed in multiple sections, with one set arranged forward and one backward, and these two sets are closely coordinated. Due to its relatively long overall length, spanning several structural sections, special attention must be paid to the connection and matching between the sections during assembly. The roller structure comes in two types: fixed and follow-up, responsible for driving the door to move up and down on the slide rail. In actual assembly operations, traditional measurement methods often fail to accurately locate the optimal matching position between the slide rail and the roller. This uncertainty can lead to deviations after final assembly, affecting product performance and incurring additional rework costs.

[0004] Furthermore, due to the complex motion relationship between the slide rails and rollers, the interaction effects between the components cannot be accurately predicted in the early stages of assembly. This means that many potential problems can only manifest in the final assembly stage, increasing the risk of quality issues and leading to cost overruns. Summary of the Invention

[0005] The purpose of this invention is to provide a sliding motion mechanism for a hatch and its installation method, which can solve the technical problems of difficulty in controlling the overall position of multi-section slide rails after cross-regional installation and coordination between different structural components, and ensure that the pulley system of the structure can achieve smooth movement after final assembly.

[0006] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows: A method for installing a hatch sliding motion mechanism includes: A three-dimensional assembly model of a hatch sliding motion mechanism is constructed. The hatch sliding motion mechanism includes an upper slide rail and a lower slide rail. The upper slide rail and the lower slide rail are fixed by support components. One side of the upper slide rail is provided with an upper sliding groove, and an upper pulley is provided in the upper sliding groove. One side of the lower slide rail is provided with a lower sliding groove, and a lower sliding wheel is provided in the lower sliding groove. The upper pulley and the lower sliding wheel are connected by a connecting rod to realize the relative sliding cooperation of the upper pulley along the extension direction of the upper slide rail and the lower sliding wheel along the extension direction of the lower slide rail. The upper slide rail of the three-dimensional assembly model is randomly divided into a segmented model containing two segmented structures; Based on the segmented models corresponding to different segmented positions, assembly simulation analysis is performed on the lower slide rail and the upper slide rail corresponding to different segmented models under a preset number of simulations to obtain the step difference at the segmented positions of the two segmented structures. Select a segmented model whose step difference meets the pass rate requirement as the segmented structure of the upper slide rail, and complete the installation and positioning of the hatch sliding motion mechanism according to the position of the support component of the upper slide rail and the position of the support component of the lower slide rail.

[0007] Furthermore, taking the preset positioning tolerance of the upper slide rail and the corresponding support component, and the preset attitude adjustment accuracy during the installation of the upper slide rail as input, assembly simulation is performed on different segment models under a preset number of simulations. The Monte Carlo method is used to calculate the tolerance of each segment model to obtain the step difference at the segment position of the two segment structures.

[0008] Furthermore, based on the lengths of the two segmented structures in the segmented model, the segmented structure with the longest length is taken as the main positioning structure, and the step difference between the other segmented structure and the main positioning structure is obtained through simulation.

[0009] Furthermore, the pass rate requirement for the step difference is as follows: the step difference simulation calculation results are expressed as a normal distribution, and the pass rate of the reverse difference being greater than or equal to the first step difference threshold and the forward difference being less than or equal to the second step difference threshold is greater than or equal to the preset ratio threshold.

[0010] Furthermore, the first difference threshold is set to -1.0mm, the second difference threshold is set to +1.5mm, and the preset pass rate threshold is 99.73%.

[0011] Furthermore, the preset number of simulations is greater than or equal to 5000.

[0012] Furthermore, the upper slide rail is a multi-segment combination structure arranged along the extension direction, with the connection point of two adjacent segment structures as the segment position, dividing the upper slide rail of the three-dimensional assembly model into a segmented model containing two segment structures.

[0013] Furthermore, a segmented model with a coordinated relationship is established in the 3DCS software, and the assembly simulation of the two segmented models is performed.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: This invention divides the upper slide rail in the three-dimensional model of the hatch sliding motion mechanism into segments, forming a segmented model containing two segmented structures. By performing assembly simulation analysis on different segmented models under a preset number of simulations, the step difference data at the segment positions of the two segmented structures can be obtained. Finally, the segmented model whose step difference meets the qualification rate requirements is selected as the segmented structure of the upper slide rail. Combined with the position of the support components of the upper and lower slide rails, the installation and positioning of the hatch sliding motion mechanism is completed. This ensures the accuracy and stability of the installation, while solving the technical problems of difficulty in controlling the overall positional degree and coordination between different structural components after multi-segment slide rails are installed across regions. This ensures that the upper pulley system of the final assembled structure can achieve smooth movement. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating the installation method of the sliding motion mechanism of the cabin door in Example 1 or 2. Figure 2 This is a schematic diagram of the upward sliding motion mechanism of the cabin door in Embodiment 1 or 2; Figure 3 This is a normal distribution plot of the simulation results of the step difference when the segment position is at position B in Example 2; Figure 4 This is a normal distribution plot of the simulation results of the step difference when the segment position is at position A in Example 2; Among them, 1. upper slide rail; 2. lower slide rail; 3. support components. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0017] Example 1 See Figure 1 and Figure 2 A method for installing a hatch sliding motion mechanism, comprising: A three-dimensional assembly model of the hatch sliding motion mechanism is constructed. The hatch sliding motion mechanism includes an upper slide rail 1 and a lower slide rail 2. The upper slide rail 1 and the lower slide rail 2 are fixed by support components 3. The upper slide rail 1 has an upper sliding groove on one side, and an upper pulley is arranged in the upper sliding groove. The lower slide rail 2 has a lower sliding groove on one side, and a lower sliding wheel is arranged in the lower sliding groove. The upper pulley and the lower sliding wheel are connected by a connecting rod to realize the relative sliding cooperation of the upper pulley along the extension direction of the upper slide rail 1 and the lower sliding wheel along the extension direction of the lower slide rail 2. The upper slide rail 1 of the three-dimensional assembly model is randomly divided into a segmented model containing two segmented structures; Based on the segmented models corresponding to different segmented positions, assembly simulation analysis is performed on the lower slide rail 2 and the upper slide rail 1 corresponding to different segmented models under a preset number of simulations to obtain the step difference at the segmented positions of the two segmented structures. Select a segmented model whose step difference meets the pass rate requirement as the segmented structure of the upper slide rail 1, and complete the installation and positioning of the hatch sliding motion mechanism according to the position of the support component 3 of the upper slide rail 1 and the position of the support component 3 of the lower slide rail 2.

[0018] In this embodiment, a three-dimensional assembly model is constructed to simulate the assembly relationship and spatial position of each component of the hatch sliding motion mechanism. The upper slide rail 1 in the three-dimensional model is divided into segments to form a segmented model containing two segmented structures. By performing assembly simulation analysis on different segmented models under a preset number of simulations, the step difference data at the segmented positions of the two segmented structures can be obtained. Finally, the segmented model whose step difference meets the qualification rate requirement is selected as the segmented structure of the upper slide rail 1. Combined with the positions of the support components 3 of the upper slide rail 1 and the lower slide rail 2, the installation and positioning of the hatch sliding motion mechanism is completed. This ensures the accuracy and stability of the installation while solving the technical problems of difficulty in controlling the overall position of multi-segment slide rails after cross-regional installation and coordination between different structural components, ensuring that the upper pulley system of the final assembled structure can achieve smooth movement.

[0019] Based on the same inventive concept, this embodiment also provides a door sliding motion mechanism, which is obtained by the installation method described above.

[0020] Example 2 See Figure 1 and Figure 2 A method for installing a hatch sliding motion mechanism, comprising: Step 1: Construct a 3D assembly model of the hatch sliding motion mechanism; The assembly target of this embodiment is a segmented slide rail structure. The dimensional influence of other structural components is not considered; therefore, only the relevant parts of the slide rail itself are retained. An assembly digital model including the upper slide rail 1, lower slide rail 2, support assembly 3, and wall panel structure is created based on the external surface. Figure 2 As shown, the upper slide rail 1 and the lower slide rail 2 are respectively fixed by the support assembly 3. The upper slide rail 1 has an upper sliding groove on one side, and an upper pulley is provided in the upper sliding groove. The lower slide rail 2 has a lower sliding groove on one side, and a lower sliding wheel is provided in the lower sliding groove. The upper pulley and the lower sliding wheel are connected by a connecting rod to realize the relative sliding of the upper pulley along the extension direction of the upper slide rail 1 and the lower sliding wheel along the extension direction of the lower slide rail 2.

[0021] Step 2: Randomly divide the upper slide rail 1 of the three-dimensional assembly model into a segmented model containing two segmented structures; In this embodiment, the upper slide rail 1 is a multi-segment composite structure arranged along the extension direction. The upper slide rail 1 of the three-dimensional assembly model is divided into multiple different segmented models, each containing two segmented structures, with the connection point between two adjacent segmented structures as the segmentation position. For example... Figure 2 There are two types of segmented models: Model 1: The segment position of the upper slide rail 1 structure is at position B below the wall panel block; Model 2: The segment position of the upper slide rail 1 structure is at position A, directly opposite the wall panel segment.

[0022] Step 3: Based on the segmented models corresponding to different segmented positions, perform assembly simulation analysis on the lower slide rail 2 and the upper slide rail 1 corresponding to different segmented models under a preset number of simulations to obtain the step difference at the segmented positions of the two segmented structures. In this embodiment, a segmented model with a coordinated relationship is established in the 3DCS software. The preset positioning tolerance of the upper slide rail 1 and the corresponding support component 3, and the preset attitude adjustment accuracy of the upper slide rail 1 during installation are used as inputs. Assembly simulation calculations are performed on the slide rail tolerance models of different segments. The assembly simulation number is set to 5000 by clicking the run analysis button. According to the length of the two segmented structures in the segmented model, the segmented structure with the longest length is taken as the main positioning structure. The step difference between the other segmented structure and the main positioning structure is calculated using the Monte Carlo method.

[0023] like Figure 3 , Figure 4 As shown, in this embodiment, when the segment position of the upper slide rail 1 structure is at position B below the wall panel block, the minimum and maximum values ​​of the step difference between the two segments of the upper slide rail 1 are -2.23mm and 2.35mm, respectively, and the maximum frequency of the step difference is Max=352; when the segment position of the upper slide rail 1 structure is at position A directly opposite the wall panel block, the minimum and maximum values ​​of the step difference between the two segments of the upper slide rail 1 are -1.37mm and 1.05mm, respectively, and the maximum frequency of the step difference is Max=345.

[0024] Step 4: Select a segmented model whose step difference meets the pass rate requirements as the segmented structure of the upper slide rail 1, and complete the installation and positioning of the hatch sliding motion mechanism according to the position of the support component 3 of the upper slide rail 1 and the position of the support component 3 of the lower slide rail 2. In this embodiment, the qualification rate requirement for the step difference is as follows: the simulation calculation results of the step difference are expressed as a normal distribution, and the qualification rate is greater than or equal to the first step difference threshold of -1.0mm and the positive difference of less than or equal to the second step difference threshold of +1.5mm, which is greater than or equal to 99.73%. According to the analysis results in step three, when the segment position of the upper slide rail 1 structure is at position B below the wall panel block, the minimum and maximum values ​​of the step difference between the two segments of the upper slide rail 1 are -2.23mm and 2.35mm, respectively, which exceed the qualification line by 1.23mm. The final product step difference failure rate is 9.74%, which does not meet the product qualification rate control requirements. When the segment position of the upper slide rail 1 structure is at position A directly opposite the wall panel block, the minimum and maximum values ​​of the slide rail connection step difference are -1.37mm and 1.05mm, respectively, which exceed the qualification line by 0.37mm. The product step difference failure rate is 0.12% (i.e., the qualification rate is 99.88%), which meets the product qualification rate control requirements and can be used for actual production and installation positioning.

[0025] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for installing a sliding door mechanism, characterized in that, include: A three-dimensional assembly model of a hatch sliding motion mechanism is constructed. The hatch sliding motion mechanism includes an upper slide rail and a lower slide rail. The upper slide rail and the lower slide rail are fixed by support components. One side of the upper slide rail is provided with an upper sliding groove, and an upper pulley is provided in the upper sliding groove. One side of the lower slide rail is provided with a lower sliding groove, and a lower sliding wheel is provided in the lower sliding groove. The upper pulley and the lower sliding wheel are connected by a connecting rod to realize the relative sliding cooperation of the upper pulley along the extension direction of the upper slide rail and the lower sliding wheel along the extension direction of the lower slide rail. The upper slide rail of the three-dimensional assembly model is randomly divided into a segmented model containing two segmented structures; Based on the segmented models corresponding to different segmented positions, assembly simulation analysis is performed on the lower slide rail and the upper slide rail corresponding to different segmented models under a preset number of simulations to obtain the step difference at the segmented positions of the two segmented structures. Select a segmented model whose step difference meets the pass rate requirement as the segmented structure of the upper slide rail, and complete the installation and positioning of the hatch sliding motion mechanism according to the position of the support component of the upper slide rail and the position of the support component of the lower slide rail.

2. The installation method according to claim 1, characterized in that, Using the preset positioning tolerance of the upper slide rail and the corresponding support component, and the preset attitude adjustment accuracy during the installation of the upper slide rail as input, assembly simulation is performed on different segment models under a preset number of simulations. The Monte Carlo method is used to calculate the tolerance of each segment model to obtain the step difference at the segment position of the two segment structures.

3. The installation method according to claim 1, characterized in that, Based on the lengths of the two segmented structures in the segmented model, the segmented structure with the longest length is taken as the main positioning structure, and the step difference between the other segmented structure and the main positioning structure is obtained through simulation.

4. The installation method according to claim 3, characterized in that, The pass rate requirement for the step difference is as follows: the step difference simulation calculation results are expressed as a normal distribution, and the pass rate of the reverse difference is greater than or equal to the first step difference threshold and the forward difference is less than or equal to the second step difference threshold is greater than or equal to the preset ratio threshold.

5. The installation method according to claim 4, characterized in that, The first-order difference threshold is set to -1.0mm, the second-order difference threshold is set to +1.5mm, and the preset pass rate threshold is 99.73%.

6. The installation method according to claim 1, characterized in that, The preset number of simulations is greater than or equal to 5000.

7. The installation method according to claim 1, characterized in that, The upper slide rail is a multi-segment combination structure arranged along the extension direction. The upper slide rail of the three-dimensional assembly model is divided into a segmented model containing two segmented structures, with the connection point of two adjacent segmented structures as the segment position.

8. The installation method according to claim 1, characterized in that, In 3DCS software, a segmented model with a coordinated relationship is established, and the assembly simulation of the two segmented models is performed.

9. A hatch sliding motion mechanism, characterized in that, It is obtained by the installation method described in any one of claims 1-8.

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