Flexible hinge with horizontal rigidity
By designing a flexible hinge with horizontal stiffness and utilizing a combination of elastic components and connecting blocks, the problem of displacement and angular uncertainty of the airbag in the horizontal direction was solved, improving the accuracy and stability of the instrument and avoiding stress concentration and wear.
Patent Information
- Application Number
- CN202520643616.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-04-08
AI Technical Summary
The displacement and angular uncertainty of the existing airbag in the horizontal direction leads to a decrease in the accuracy and stability of the instrument, and the stress concentration of the existing flexible hinge leads to a reduction in lifespan and stability.
A flexible hinge with horizontal stiffness is designed. By deforming the first and second elastic parts in different directions, combined with the design of connecting blocks and clearance holes, the displacement and angle control of the airbag in the horizontal direction are ensured to be precise and stress concentration is avoided.
It achieves stable displacement and angle control of the airbag in the horizontal direction, improves the overall accuracy and stability of the instrument, avoids wear and noise, and extends the service life of the flexible hinge.
Smart Images
Figure CN223781954U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of air bag, especially a flexible hinge with horizontal rigidity. BACKGROUND
[0002] In the field of precision manufacturing and measurement, ensuring the stability and precision of instruments is crucial. With the advancement of technology, the performance requirements for precision instruments are increasingly higher, especially in scenarios that require high-precision measurement, such as optical instruments, precision mechanical assembly lines, and aerospace equipment. However, these precision instruments often face various external disturbances, such as vibration, temperature changes, and mechanical stress, which can negatively impact the precision and stability of the instruments.
[0003] To effectively reduce the impact of the inherent frequency in the vertical direction on precision instruments, a common approach is to use an air bag as a buffer device. The air bag, with its good elasticity and deformation ability, can effectively absorb and disperse the vibration energy from the external environment, thereby significantly reducing the vibration amplitude of the instrument in the vertical direction and improving the measurement precision. However, the air bag faces a key problem in actual application: the uncertainty of its displacement and angle in the horizontal direction. This uncertainty can cause additional displacement or tilting of the instrument in the horizontal direction, thereby affecting the overall precision and stability of the instrument.
[0004] To solve the problem of uncertainty of displacement and angle of the air bag in the horizontal direction, a flexible hinge is introduced, but the existing flexible hinge has stress concentration at a certain point. This stress concentration phenomenon not only reduces the life and stability of the hinge, but also can cause plastic deformation or fatigue fracture of the hinge during long-term use, thereby affecting the performance and precision of the entire mechanical system.
[0005] Therefore, the present application develops a flexible hinge with horizontal rigidity to solve the problems existing in the prior art. UTILITY MODEL CONTENTS
[0006] The utility model aims to provide a flexible hinge with horizontal rigidity to solve the problem of uncertainty of displacement and angle of the air bag in the horizontal direction in the prior art.
[0007] The technical solution of the utility model is: a flexible hinge with horizontal rigidity, comprising:
[0008] A fixed part;
[0009] An air bag, the top of the air bag is provided with an adapter, and the adapter is provided with a relief hole;
[0010] The flexible hinge is fixedly connected with one end of the fixed part and the avoiding hole respectively, and is arranged along the radial direction of the air bag, and the flexible hinge comprises a first elastic part and a second elastic part, the first elastic part and the second elastic part are sequentially connected to form a strip shape, and the first elastic part and the second elastic part are deformed in two directions to determine the displacement and the moving angle of the air bag in the horizontal direction.
[0011] Preferably, the first elastic part and the second elastic part are connected through a connecting block, the connecting block is provided with a first notch and a second notch respectively, the first notch corresponds to the first elastic part, and the second notch corresponds to the second elastic part.
[0012] Preferably, the first elastic part comprises a pair of first elastic sheets, the second elastic part comprises a pair of second elastic sheets, the pair of first elastic sheets are oppositely arranged, the pair of second elastic sheets are oppositely arranged, and the pair of first elastic sheets and the pair of second elastic sheets are fixed on four sides of the connecting block respectively.
[0013] Preferably, the deformation direction of the first elastic sheet is along the radial direction of the air bag, and the deformation direction of the second elastic sheet is along the axial direction of the air bag.
[0014] Preferably, two flexible hinges are arranged along the radial direction of the air bag, and the extension directions of the flexible hinges are perpendicular to each other.
[0015] Preferably, the internal space of the avoiding hole is greater than the sectional area of the flexible hinge, so that the flexible hinge is not in contact with the adapter when the flexible hinge moves.
[0016] Compared with the prior art, the utility model has the advantages that:
[0017] (1) the displacement of the air bag in the horizontal plane can be comprehensively reflected through the deformation of the first elastic part and the second elastic part in two perpendicular directions, no matter which direction the external force comes from, the flexible hinge can effectively limit the displacement of the air bag, and meanwhile, the stable movement of the air bag in a specific direction is ensured, so that the overall precision and stability of the instrument are improved;
[0018] (2) the deformation directions of the first elastic sheet and the second elastic sheet are respectively set as the radial direction and the axial direction, not only the deformation directions are accurately controlled, but also the uniform distribution of stress in the flexible hinge is helped, fatigue fracture caused by stress concentration and excessive stress is avoided, and the stability and durability of the structure are further improved;
[0019] (3) The inside space of the avoiding hole is larger than the cross-sectional area of the flexible hinge, which ensures that the flexible hinge does not come into physical contact with the adapter or other components during movement or deformation, avoids wear, noise and performance decline, and enables the flexible hinge to maintain its original movement flexibility, meeting the system's requirements for precise control of displacement and angle. BRIEF DESCRIPTION OF DRAWINGS
[0020] The utility model will be further described in connection with the drawings and examples:
[0021] Fig. 1 It is a structural schematic view of the flexible hinge with horizontal rigidity according to the utility model;
[0022] Fig. 2 It is a top view of the connection of the air bag and the flexible hinge according to the utility model;
[0023] Fig. 3 It is a structural schematic view of the flexible hinge according to the utility model.
[0024] Wherein: 1, fixed part; 2, air bag; 21, adapter; 22, avoiding hole; 3, flexible hinge; 31, first elastic part; 311, first elastic sheet; 32, second elastic part; 321, second elastic sheet; 33, connecting block; 331, first notch; 332, second notch. DETAILED DESCRIPTION
[0025] The content of the utility model will be further described in detail in connection with specific examples:
[0026] For example, Figs. 1-3As shown, a flexible hinge 3 with horizontal stiffness includes a fixed part 1, an air bag 2, and a flexible hinge 3, and the top of the air bag 2 is fixed with an adapter 21, the adapter 21 is provided with a relief hole 22 for installing the flexible hinge 3, and the two ends of the flexible hinge 3 are respectively fixed in one end of the fixed part 1 and the relief hole 22. The flexible hinge 3 includes a first elastic part 31 and a second elastic part 32, when the air bag 2 is subjected to external force, the first elastic part 31 and the second elastic part 32 of the flexible hinge 3 will be deformed, and the displacement of the air bag 2 in the horizontal direction can be accurately determined. In addition, the first elastic part 31 includes a pair of first elastic sheets 311, and the second elastic part 32 includes a pair of second elastic sheets 321, the flexible hinge 3 transmits horizontal displacement to the first elastic sheet 311 and the second elastic sheet 321, so as to achieve the effect of horizontal positive and negative stiffness parallel connection of the flexible hinge 3 and the air bag 1; at the same time, the flexible hinge 3 also decouples the movement of the air bag 1 top support, and separates the bending moment, vertical displacement and other factors affecting the stiffness of the first elastic sheet 311 and the second elastic sheet 321, so that the force transmitted to the first elastic sheet 311 and the second elastic sheet 321 is perpendicular to the corresponding first elastic sheet 311 and the second elastic sheet 321, further, the first elastic part 31 and the second elastic part 32 are placed at 90°, and through force decomposition, the positive and negative stiffness parallel connection of the air bag 1 in the horizontal direction (transverse and longitudinal direction) can be achieved, and the setting of the two flexible hinges 3 can enhance the overall structural stability of the air bag 1, ensure that it can maintain a stable state when subjected to external force, and more accurately control the deformation of the air bag 1 in the radial direction.
[0027] In the embodiment, as shown in the figure, Figs. 2-3 The first elastic part 31 and the second elastic part 32 are connected through a connecting block 33, the connecting block 33 serves as an intermediate transition part, which can enhance the connection strength between the first elastic part 31 and the second elastic part 32, thereby improving the structural stability of the whole flexible hinge 3, and the connecting block 33 is further provided with a first slot 331 and a second slot 332, so that the first elastic part 31 and the second elastic part 32 can deform more freely when subjected to external force, while maintaining a certain directionality, which can accurately control the deformation characteristics of the first elastic part 31 and the second elastic part 32, thereby meeting the specific application requirements, and the design of the connecting block 33 and the slot can disperse the impact of external force on the flexible hinge 3.
[0028] Further, the deformation directions of the first elastic sheet 311 and the second elastic sheet 321 are respectively set as the radial direction and the axial direction, which can more accurately control the deformation direction of the flexible hinge 3 when subjected to external force, and help to meet the accurate requirements of displacement and angle of specific applications; at the same time, different deformation directions can make the stress more evenly distributed inside the flexible hinge 3, thereby avoiding the occurrence of local stress overload.
[0029] Specifically, the air bag 2 is provided with two flexible hinges 3, which are arranged perpendicular to each other along the radial direction of the air bag 2, forming a stable support structure, enhancing the overall structural stability of the air bag 2, ensuring that it can maintain a stable state when subjected to external forces, and more accurately control the deformation of the air bag 2 in the radial direction.
[0030] Further, the internal space of the avoidance hole 22 is larger than the cross-sectional area of the flexible hinge 3, ensuring that the flexible hinge 3 does not come into physical contact with the adapter 21 or other components during movement or deformation, avoiding wear, noise and possible performance degradation due to interference or friction, and the non-contact design allows the flexible hinge 3 to maintain its original movement flexibility, and the flexible hinge 3 can freely deform without obstruction, thereby meeting the system's requirements for precise control of displacement and angle.
[0031] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.
Claims
1. A flexible hinge with horizontal stiffness, characterized in that, include: Fixing part (1); Airbag (2), the top of the airbag (2) is provided with a connector (21), and the connector (21) is provided with a clearance hole (22); A flexible hinge (3) is fixedly connected at both ends to one end of the fixed part (1) and the clearance hole (22), and is arranged radially along the airbag (2). The flexible hinge (3) includes a first elastic part (31) and a second elastic part (32). The first elastic part (31) and the second elastic part (32) are connected in sequence to form a long strip. The first elastic part (31) and the second elastic part (32) deform in two directions to determine the displacement and movement angle of the airbag (2) in the horizontal direction.
2. The flexible hinge with horizontal stiffness according to claim 1, characterized in that: The first elastic part (31) and the second elastic part (32) are connected by a connecting block (33). The connecting block (33) is provided with a first slot (331) and a second slot (332). The first slot (331) corresponds to the first elastic part (31), and the second slot (332) corresponds to the second elastic part (32).
3. A flexible hinge with horizontal stiffness according to claim 2, characterized in that: The first elastic part (31) includes a pair of first elastic sheets (311), and the second elastic part (32) includes a pair of second elastic sheets (321). The pair of first elastic sheets (311) are arranged opposite to each other, and the pair of second elastic sheets (321) are arranged opposite to each other. The pair of first elastic sheets (311) and the pair of second elastic sheets (321) are respectively fixed on the four sides of the connecting block (33).
4. A flexible hinge with horizontal stiffness according to claim 3, characterized in that: The deformation direction of the first elastic sheet (311) is along the radial direction of the airbag (2), and the deformation direction of the second elastic sheet (321) is along the axial direction of the airbag (2).
5. A flexible hinge with horizontal stiffness according to claim 1, characterized in that: Two flexible hinges (3) are arranged radially along the airbag (2), and the extension directions of the flexible hinges (3) are perpendicular to each other.
6. A flexible hinge with horizontal stiffness according to claim 1, characterized in that: The internal space of the clearance hole (22) is larger than the cross-sectional area of the flexible hinge (3), so that the flexible hinge (3) does not contact the adapter (21) when it moves.