Airplane cabin door spring boosting mechanism
By arranging two springs in parallel and using the design of the guide rod, the space and weight problems caused by multiple springs in the existing technology are solved, and a more efficient boosting effect and more stable spring performance are achieved.
Patent Information
- Application Number
- CN202421125135.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing aircraft door spring assist mechanism requires multiple springs to be used as a support mechanism, resulting in large space occupied by the mechanism and increased weight, which increases the design difficulty.
The two springs are arranged in parallel through a set of spring guides to achieve synchronous driving of the two springs, and the stability and boosting effect of the springs are ensured through the design of the lower guide rod and the upper guide rod.
It achieves a larger elastic force output, simplifies the mechanism form, reduces the weight of the mechanism and space occupation, improves the stability of the spring, and solves the problems of insufficient power assist performance and design difficulty of the hatch mechanism.
Smart Images
Figure CN222376265U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of civil aircraft cabin door mechanisms, and relates to an aircraft cabin door spring booster mechanism, in particular to a spring mechanism which can provide greater elastic force. Background Art
[0002] Aircraft cabin doors are complex moving parts that contain many types of mechanisms. In order to achieve functions such as controlling the door opening operating force, keeping the door mechanism in a certain moving position, and controlling the movement form of the mechanism, it is usually necessary to design corresponding power-assisting measures, which are generally implemented using spring mechanisms. Mechanical springs have multiple advantages such as low cost, light weight, and excellent fatigue performance. They are the most commonly used elastic power-assisting mechanisms in aircraft cabin doors. In order to meet the spring force requirements and the mechanical performance requirements of the springs, it is usually necessary to design multiple springs to serve as power-assisting mechanisms together. However, the technical solution of multiple springs requires a larger mechanism layout space and more weight indicators, which increases the difficulty of the overall cabin door design. Utility Model Content
[0003] The utility model provides an aircraft cabin door spring booster mechanism, which arranges two springs in parallel through a group of spring guides to achieve synchronous driving of the two springs, ensure high spring stability, increase spring booster effect, simplify mechanism form, and reduce mechanism weight.
[0004] In order to achieve the above purpose, the specific technical solution of the utility model is as follows:
[0005] A spring booster mechanism for an aircraft cabin door, the spring booster mechanism comprising a lower guide rod 1, an upper guide rod 2, an outer compression spring 3 and an inner compression spring 4, the above components together constitute a retractable structure, outputting spring force to the outside. The lower guide rod 1 is a cylinder with an open end, the inner wall is an inner cavity 7, the circumferential surface of the open end is an end surface 5, and the outer surface of the closed end is provided with a lower hinge connection hole 12; the upper guide rod 2 is also a cylinder with an open end, a boss is provided along the circumference of the closed end, the lower surface of the boss is a front step surface 6, an upper hinge connection hole 11 is provided on the outer surface of the closed end, the outer surface of the cylinder is an outer cylindrical surface 9, a coaxial small-diameter guide column 8 is provided at the open end, the circumferential surface of the open end, i.e., the step surface between the guide column 8 and the cylinder is a rear step surface 10, the outer cylindrical surface 9 and the inner surface of the inner cavity 7 are matched with a small gap, the upper guide rod 2 is installed in the inner cavity 7 of the lower guide rod 1, and can be telescopically slidable. The inner compression spring 4 is installed in the inner cavity 7, with one end pressed against the bottom of the inner cavity 7, and the other end sleeved on the guide column 8 and pressed against the rear step surface 10. The outer compression spring 3 is sleeved on the outer cylindrical surface 9, with one end fixed and pressed against the front step surface 6, and the other end fixed and pressed against the end surface 5. The upper hinge connection hole 11 and the lower hinge connection hole 12 are hingedly connected to the door mechanism and the structure respectively according to the design requirements.
[0006] The beneficial effects of the utility model are:
[0007] 1. Good power-assisting effect. The utility model adopts the form of two springs connected in parallel. The two springs work together to provide greater elastic force, solving the problem of insufficient power-assisting performance of the hatch mechanism.
[0008] 2. Small space occupation and light weight. Compared with the traditional parallel spring mechanism, the utility model realizes one set of guide components driving two springs through the longitudinal layout and nested design of two springs. Compared with the traditional two sets of springs arranged separately, it reduces the number of mechanisms and the space requirements for mechanism movement, and has obvious advantages in space and weight.
[0009] 3. Good spring stability. The inner compression spring of the utility model is installed inside the inner cavity of the lower guide rod, and the inner cavity surface can provide better movement guidance for the spring; the outer compression spring is installed outside the upper guide rod, and the outer cylindrical surface 9 of the upper guide rod can provide better movement guidance for the spring; the above design ensures higher spring stability and solves the problem of spring instability caused by excessive spring length. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is an axonometric view of the aircraft door spring assist mechanism.
[0011] Figure 2 A cross-sectional view of the aircraft door spring assist mechanism.
[0012] Figure 3 Schematic diagram of the lower guide rod.
[0013] Figure 4 Schematic diagram of the upper guide rod.
[0014] In the figure: 1 lower guide rod; 2 upper guide rod; 3 outer compression spring; 4 inner compression spring; 5 end surface; 6 front step surface; 7 inner cavity; 8 guide column; 9 outer cylindrical surface; 10 rear step surface; 11 upper hinge connection hole; 12 lower hinge connection hole. DETAILED DESCRIPTION
[0015] The technical solution of the utility model is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. All other embodiments improved or adjusted by ordinary technicians in this field based on the embodiments of the utility model belong to the protection scope of the utility model.
[0016] like Figures 1 to 4As shown, a spring booster mechanism for an aircraft cabin door, the spring booster mechanism comprises a lower guide rod 1, an upper guide rod 2, an outer compression spring 3 and an inner compression spring 4, the above components together constitute a retractable structure, outputting spring force to the outside. The lower guide rod 1 is a cylinder with an open end, the inner wall is an inner cavity 7, the circumferential surface of the open end is an end surface 5, and the outer surface of the closed end is provided with a lower hinge connection hole 12; the upper guide rod 2 is also a cylinder with an open end, a boss is provided along the circumference of the closed end, the lower surface of the boss is a front step surface 6, an upper hinge connection hole 11 is provided on the outer surface of the closed end, the outer surface of the cylinder is an outer cylindrical surface 9, a coaxial small-diameter guide column 8 is provided at the open end, the circumferential surface of the open end, i.e., the step surface between the guide column 8 and the cylinder is a rear step surface 10, the outer cylindrical surface 9 and the inner surface of the inner cavity 7 are matched with a small gap, the upper guide rod 2 is installed in the inner cavity 7 of the lower guide rod 1, and can be telescopically slidable. The inner compression spring 4 is installed in the inner cavity 7, with one end pressed against the bottom of the inner cavity 7, and the other end is sleeved on the guide column 8 and pressed against the rear step surface 10. The outer compression spring 3 is sleeved on the outer cylindrical surface 9, with one end fixed and pressed against the front step surface 6, and the other end fixed and pressed against the end surface 5. The upper hinge connection hole 11 and the lower hinge connection hole 12 are hingedly connected to the door mechanism and structure respectively according to design requirements. In this embodiment, the lower guide rod 1 is hingedly connected to the door structure through the lower hinge connection hole 12, and the upper guide rod 2 is hingedly connected to the door mechanism through the upper hinge connection hole 11.
[0017] The working process is as follows: the inner compression spring 4 drives the lower guide rod 12 to move along the surface of the inner cavity 7 through the rear step surface 10, and the inner compression spring 4 maintains stable movement under the constraints of the inner cavity 7 and the guide column 8. The outer compression spring 3 drives the lower guide rod 12 to move along the surface of the inner cavity 7 through the front step surface 6, and the outer compression spring 3 maintains stable movement under the constraints of the outer cylindrical surface 9. The above two springs work together to drive the lower guide rod 12 to extend, and the two springs realize the parallel function. The lower guide rod 12 is hingedly connected to the hatch mechanism to transmit the spring force to other mechanisms.
[0018] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.
Claims
1. An aircraft door spring booster mechanism, characterized in that: The spring booster mechanism comprises a lower guide rod (1), an upper guide rod (2), an outer compression spring (3) and an inner compression spring (4); The lower guide rod (1) is a cylinder with an open end, the inner wall is an inner cavity (7), and the circumferential surface of the open end is an end surface (5); the upper guide rod (2) is also a cylinder with an open end, a boss is arranged along the circumference of the closed end, the lower surface of the boss is a front step surface (6), the outer surface of the cylinder is an outer cylindrical surface (9), and the circumferential surface of the open end is a rear step surface (10); the upper guide rod (2) is inserted into the inner cavity (7) of the lower guide rod (1) and can be telescopically slidable; the inner compression spring (4) is installed in the inner cavity (7), one end is pressed against the bottom of the inner cavity (7), and the other end is pressed against the rear step surface (10); the outer compression spring (3) is sleeved on the outer cylindrical surface (9), one end is fixed and pressed against the front step surface (6), and the other end is fixed and pressed against the end surface (5); the closed ends of the lower guide rod (1) and the upper guide rod (2) are respectively hingedly connected to the door mechanism and the structure.
2. The aircraft door spring booster mechanism according to claim 1, characterized in that: A coaxial small-diameter guide column (8) is arranged at the open end of the upper guide rod (2), and one end of the inner compression spring (4) pressed tightly against the rear step surface (10) is sleeved on the guide column (8).
3. An aircraft door spring booster mechanism according to claim 1 or 2, characterized in that: The outer cylindrical surface (9) and the inner surface of the inner cavity (7) are matched with each other with a small gap.
4. An aircraft door spring booster mechanism according to claim 1 or 2, characterized in that: The closed end outer surfaces of the lower guide rod (1) and the upper guide rod (2) are respectively provided with a lower hinge connection hole (12) and an upper hinge connection hole (11), which are used to be hingedly connected to the door mechanism and the structure respectively.
5. The aircraft door spring booster mechanism according to claim 3, characterized in that: The closed end outer surfaces of the lower guide rod (1) and the upper guide rod (2) are respectively provided with a lower hinge connection hole (12) and an upper hinge connection hole (11), which are used to be hingedly connected to the door mechanism and the structure respectively.