Rigidity-adjustable spring damper
By designing spring dampers with adjustable stiffness, the problem of unadjustable stiffness of traditional dampers is solved, and efficient energy absorption and buffering under different load conditions is achieved, which extends the equipment life and reduces maintenance frequency.
Patent Information
- Application Number
- CN202520076686.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2035-01-14
AI Technical Summary
The stiffness of traditional spring dampers is unadjustable, resulting in poor performance under different load conditions, which may lead to accelerated wear and maintenance of equipment and cannot meet the needs of multiple applications.
A spring damper with adjustable stiffness is designed to change the spacing between the piston and the second and third springs by rotating the rotating blocks, adjust the damping force and cushioning characteristics, and use threaded connections and anti-slip sleeves to enhance operating stability, combining the multi-layer buffer structure and hydraulic oil to consume energy.
It realizes flexible adjustment of spring dampers, improves performance under different load conditions, extends equipment life, reduces maintenance frequency, and enhances energy absorption and dissipation capabilities.
Smart Images
Figure CN223203568U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of spring dampers, and particularly relates to a spring damper with adjustable stiffness. Background Art
[0002] A spring damper is a device that uses the elastic and damping properties of a spring to reduce vibration and impact. It is mainly composed of a spring and a damping element. The spring part provides elastic force and can deform when subjected to force, playing a role in buffering and vibration reduction. The damping element is used to consume energy and convert vibration energy into other forms such as heat energy, thereby reducing the amplitude and duration of vibration.
[0003] In traditional designs, many spring dampers use fixed or non-adjustable rigidity (stiffness), which means that the compression or extension resistance of the spring is constant. Non-adjustable spring dampers usually have limited adaptability. Since the stiffness cannot be adjusted, a compromise must be made between different performance requirements. This may lead to poor performance of the damper in some cases. For example, it may be too hard under light loads and too soft under heavy loads. At the same time, when external conditions do not match the fixed stiffness of the spring damper, it may cause excessive stress and vibration, thereby accelerating equipment wear and shortening its overall service life. Secondly, non-adjustable spring dampers may require more frequent inspections and maintenance to ensure that they can work normally within their designed fixed operating range. Once this range is exceeded, the damper may need to be replaced. Based on the above problems, this application document proposes a spring damper with adjustable stiffness to improve the above problems.
[0004] Based on the above problems, this application document proposes a spring damper with adjustable stiffness to improve the above problems. Utility Model Content
[0005] The purpose of this utility model is to provide a spring damper with adjustable stiffness, which can change the distance between the piston and the second spring and the third spring by rotating the rotating block, so as to flexibly and effectively adjust the spring damper to meet various different practical application requirements.
[0006] The technical solutions adopted in this application are as follows:
[0007] A spring damper with adjustable stiffness comprises a lower shell and an upper shell, wherein the interior of the lower shell is rotatably connected to a rotating block, the lower end of the upper shell is fixed with a threaded rod, the lower end of the threaded rod passes through the rotating block and extends to the interior of the lower shell, and the rotating block and the threaded rod are threadedly connected, the upper end of the interior of the upper shell is slidably connected to a piston, the upper end of the piston is fixed with a connecting rod, a base is fixed inside the upper shell and at the lower end of the piston, a first through hole is opened in the middle of the base, and a first spring is fixed to the upper end of the piston and at the outside of the connecting rod.
[0008] In a preferred embodiment, an anti-skid rubber sleeve is sleeved on the outer side of the rotating block, and a plurality of anti-skid grooves are evenly arranged on the outer side of the anti-skid rubber sleeve.
[0009] In a preferred embodiment, grooves are provided inside the upper shell and at both ends of the piston. Limiting blocks are fixed at both ends of the piston, and the limiting blocks and the grooves are matched.
[0010] In a preferred solution, a second spring is fixed at the upper end of the base and located inside the upper shell, and a third spring is fixed at the upper end of the base and located inside the second spring.
[0011] In a preferred embodiment, cavities are provided on both sides of the interior of the upper shell, and the two cavities are connected to the interior of the upper shell.
[0012] In a preferred embodiment, a lower lifting ring is fixed to the lower end of the lower shell, and an upper lifting ring is fixed to the upper end of the connecting rod.
[0013] The technical effects achieved by this utility model are:
[0014] When the spring damper needs to be adjusted, the rotating block is rotated, and the rotating block and the threaded rod are threadedly connected. When the rotating block rotates, the threaded rod moves downward. Because the upper end of the threaded rod is fixed with the upper shell, when the upper shell moves downward, the distance between the piston and the base increases, making the second spring initially more relaxed. The second spring can produce a larger deformation to absorb energy, thereby changing the damping force output by the spring damper and the buffering characteristics. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a structural diagram of the interior of the upper shell and lower shell of the utility model;
[0017] Figure 3 For this utility model Figure 2 A partial enlarged schematic diagram of point A in the middle;
[0018] Figure 4 This is a schematic diagram of the structure inside the upper shell of the utility model;
[0019] Figure 5 This is a structural diagram of the rotating block of the utility model.
[0020] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0021] 10. Lower shell; 11. Upper shell; 12. Rotating block; 13. Threaded rod; 14. Piston; 15. Connecting rod; 16. Base; 17. First spring; 18. Groove; 19. Limit block; 20. Second spring; 21. Third spring; 22. Cavity; 23. Lower lifting ring; 24. Upper lifting ring. DETAILED DESCRIPTION
[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0024] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in various places in this specification does not necessarily refer to the same embodiment, nor does it constitute a separate or selective embodiment that is mutually exclusive with other embodiments.
[0025] Furthermore, this utility is described in detail with reference to schematic diagrams. For ease of explanation, the cross-sectional views of the device structures will be partially enlarged and not to scale when describing the embodiments of this utility. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of this utility. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.
[0026] Please see the attached Figures 1 to 3As shown, the present invention provides a spring damper with adjustable stiffness, including a lower shell 10 and an upper shell 11, the interior of the lower shell 10 is rotatably connected to a rotating block 12, the lower end of the upper shell 11 is fixed with a threaded rod 13, the lower end of the threaded rod 13 passes through the rotating block 12 and extends to the interior of the lower shell 10, and the rotating block 12 and the threaded rod 13 are threadedly connected, the upper end of the interior of the upper shell 11 is slidably connected to a piston 14, the upper end of the piston 14 is fixed with a connecting rod 15, the interior of the upper shell 11 and at the lower end of the piston 14 is fixed with a base 16, the middle part of the base 16 is provided with a first through hole, and the upper end of the piston 14 and at the outside of the connecting rod 15 is fixed with a first spring 17.
[0027] In this embodiment, the lower lifting ring 23 and the upper lifting ring 24 are fixed at both ends of the object. When the spring damper needs to be adjusted, because the rotating block 12 and the lower shell 10 are rotatably connected, the upper end of the threaded rod 13 is fixedly connected to the lower end of the upper shell 11, and the internal thread of the rotating block 12 is connected to the threaded rod 13, and the lower end of the threaded rod 13 extends to the inside of the lower shell 10. Therefore, by rotating the rotating block 12, the threaded rod 13 can drive the upper shell 11 to move downward. At this time, because the end of the connecting rod 15 away from the piston 14 is fixed with the upper lifting ring 24, and the upper lifting ring 24 is fixed to one end of the object, the piston 14 and the connecting rod 15 will not move. The downward movement of the upper shell 11 increases the stroke of the piston 14, and the second spring 20 is extended compared to the initial state. When there is energy input from the outside When the force of the impact or vibration is applied (such as energy caused by impact force, vibration force, etc.), the connecting rod 15 pushes the piston 14 downward to compress the second spring 20 to move. At this time, the second spring 20 and the third spring 21 can store more elastic potential energy through a larger deformation, and then in the subsequent movement process, more fully dissipate the stored energy in the form of heat, etc., thereby improving the energy absorption of the entire spring damper. It should be noted that the cross-sectional shape of the rotating block 12 is an I-shape, and the base 16 is located inside the upper shell 11. Hydraulic oil is provided. When the piston 14 moves, the piston 14 can push the hydraulic oil to flow. In the process of the hydraulic oil entering the cavities 22 on both sides through the first through hole opened in the base 16, part of the energy will be consumed due to its own viscosity and resistance when flowing in the chamber.
[0028] In a preferred embodiment, see Figure 5 The outer side of the rotating block 12 is sleeved with an anti-skid rubber sleeve, and the outer side of the anti-skid rubber sleeve is evenly provided with a plurality of anti-skid grooves.
[0029] In this embodiment, when the spring damper needs to be adjusted to rotate the rotating block 12, the presence of the anti-slip rubber sleeve and anti-slip grooves makes it easier for the operator to apply force. Because the rubber anti-slip rubber sleeve itself has a certain friction force, and the anti-slip grooves further increase the friction coefficient between the operator and the hand, the operator can hold the rotating block 12 more firmly, preventing the hand from slipping, and making the rotation operation smoother.
[0030] Next, please refer to Figure 4 Grooves 18 are provided inside the upper shell 11 and at both ends of the piston 14 . Limiting blocks 19 are fixed at both ends of the piston 14 , and the limiting blocks 19 and the grooves 18 are adapted to each other.
[0031] In this embodiment, the cooperation between the limit block 19 and the groove 18 can accurately constrain the movement trajectory of the piston 14, so that it can only perform linear reciprocating motion along the direction limited by the groove 18, thereby preventing the piston 14 from excessive axial movement due to excessive force or other reasons.
[0032] Secondly, please also refer to Figure 2 and Figure 3 A second spring 20 is fixed at the upper end of the base 16 and located inside the upper shell 11 , and a third spring 21 is fixed at the upper end of the base 16 and located inside the second spring 20 .
[0033] In this embodiment, when the connecting rod 15 pushes the piston 14 to move downward, the combination of the second spring 20 and the third spring 21 forms a multi-layer buffer structure. When encountering a smaller external force, the second spring 20 is fixed to the upper end of the base 16 and is located on the outside of the third spring 21, so it first plays a buffering role and gently responds to smaller vibrations and impacts. When encountering a larger impact force, when the piston 14 moves downward, the third spring 21 and the second spring 20 work together to absorb and store more energy, thereby avoiding greater damage to the equipment or the bearing structure due to a single strong impact force.
[0034] For further understanding and explanation, Figure 4 For example, cavities 22 are provided on both sides of the interior of the upper shell 11 , and the two cavities 22 are communicated with the interior of the upper shell 11 .
[0035] In this embodiment, when the piston 14 moves downward, the piston 14 pushes the hydraulic oil through the first through hole opened in the base 16 to enter the cavities 22 on both sides. During this process, the hydraulic oil flows in the internal space of the cavity 22 and consumes energy through its own viscous resistance and pressure changes (existing technology, no further details will be given).
[0036] In a preferred embodiment, see Figure 1 A lower lifting ring 23 is fixed to the lower end of the lower shell 10, and an upper lifting ring 24 is fixed to the upper end of the connecting rod 15.
[0037] In this embodiment, the setting of the lower hanging ring 23 and the upper hanging ring 24 provides a universal and convenient connection method. The lower hanging ring 23 and the upper hanging ring 24 can be used in conjunction with corresponding hooks, ropes, chains or other connecting parts, so that the spring damper can be easily adapted to a variety of different installation environments and requirements.
[0038] The working principle of this utility is:
[0039] During operation, the lower hanging ring 23 and the upper hanging ring 24 of the spring damper are fixed to the two ends of the object. By rotating the rotating block 12, the rotating block 12 rotates and drives the threaded rod 13 to move. The movement of the threaded rod 13 can drive the upper shell 11 to move downward. The downward movement of the upper shell 11 increases the stroke of the piston 14, so that the second spring 20 can store more elastic potential energy through a larger deformation, so that the damper can absorb and dissipate energy more efficiently.
[0040] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this application shall be implemented in accordance with conventional means in the art unless otherwise specified or limited.
Claims
1. A spring damper with adjustable stiffness, comprising a lower housing (10) and an upper housing (11), characterized in that: The interior of the lower shell (10) is rotatably connected to a rotating block (12), the lower end of the upper shell (11) is fixed with a threaded rod (13), the lower end of the threaded rod (13) passes through the rotating block (12) and extends to the interior of the lower shell (10), and the rotating block (12) and the threaded rod (13) are threadedly connected, the upper end of the interior of the upper shell (11) is slidably connected to a piston (14), the upper end of the piston (14) is fixed with a connecting rod (15), the interior of the upper shell (11) and the lower end of the piston (14) are fixed with a base (16), the middle part of the base (16) is provided with a first through hole, and the upper end of the piston (14) and the outer side of the connecting rod (15) are fixed with a first spring (17).
2. The spring damper with adjustable stiffness according to claim 1, characterized in that: The outer side of the rotating block (12) is sleeved with an anti-skid rubber sleeve, and the outer side of the anti-skid rubber sleeve is evenly provided with a plurality of anti-skid grooves.
3. The spring damper with adjustable stiffness according to claim 1, characterized in that: Grooves (18) are provided inside the upper shell (11) and at both ends of the piston (14). Limiting blocks (19) are fixed at both ends of the piston (14), and the limiting blocks (19) and the grooves (18) are adapted to each other.
4. The spring damper with adjustable stiffness according to claim 1, characterized in that: A second spring (20) is fixed at the upper end of the base (16) and located inside the upper shell (11), and a third spring (21) is fixed at the upper end of the base (16) and located inside the second spring (20).
5. The spring damper with adjustable stiffness according to claim 1, characterized in that: Cavities (22) are provided on both sides of the interior of the upper shell (11), and the two cavities (22) are communicated with the interior of the upper shell (11).
6. The spring damper with adjustable stiffness according to claim 1, characterized in that: A lower lifting ring (23) is fixed to the lower end of the lower shell (10), and an upper lifting ring (24) is fixed to the upper end of the connecting rod (15).