Viscous damper

Abstract

The utility model discloses viscous damper relates to damper technical field, including cylinder, piston and piston rod, the cylinder inside contains oil, the piston is contained in the cylinder inside, and can move in the cylinder, the piston rod one end is connected with the piston, the piston rod other end extends to outside, still include top pad and bottom pad, the top pad sets up in the inner top of cylinder, the bottom pad sets up in the inner bottom of cylinder, and the top pad and bottom pad are used for with piston contact. The utility model discloses a kind of viscous damper, to solve the problem of piston and cylinder top and bottom collision contact in prior art.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, and in particular to a viscous damper. Background Technology

[0002] The primary function of dampers is to suppress structural vibrations by consuming energy, thereby reducing vibration damage and improving structural safety and reliability. In the construction industry, natural disasters such as earthquakes and strong winds can trigger severe vibrations in buildings; dampers can effectively absorb this vibrational energy, reducing the degree of damage to buildings during such disasters. In bridge engineering, dynamic loads generated by vehicle traffic and wind-induced vibrations also require dampers to maintain the stable operation of the bridge structure. Furthermore, in fields such as machinery manufacturing and aerospace, dampers are also widely used to reduce vibrations during equipment operation, improving equipment precision and service life.

[0003] Viscous dampers, as an important member of the damper family, have been widely used in engineering practice due to their unique working principle and performance characteristics. The working principle of a viscous damper is based on fluid mechanics, primarily relying on the viscous resistance generated when a liquid flows in a confined space to dissipate vibration energy. Its structure typically consists of a cylinder, piston, piston rod, and oil filled within the cylinder. When the piston rod is subjected to an external force and undergoes relative motion, the piston moves within the cylinder, causing the oil to flow from one side to the other through a throttling orifice or gap on the piston. In this process, the viscosity of the oil and the resistance generated by the throttling orifice or gap produce a damping force, thereby suppressing vibration.

[0004] A viscous damper typically includes a cylinder, piston, piston rod, and hydraulic fluid. The hydraulic fluid is contained inside the cylinder. The piston is housed inside the cylinder and fits tightly against the inner wall of the cylinder, dividing the cylinder into an upper and lower chamber. One end of the piston rod is connected to the piston, and the other end extends outside the cylinder to transmit external forces. However, conventional viscous dampers in the prior art have certain shortcomings. The main issue is that when the piston moves inside the cylinder, it is prone to colliding with the top and bottom of the cylinder, leading to noise and wear caused by the piston's contact with the cylinder. Utility Model Content

[0005] This utility model discloses a viscous damper, which aims to solve the problem of collision contact between the piston and the top and bottom of the cylinder in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a viscous damper, comprising a cylinder, a piston, and a piston rod, wherein the cylinder contains oil, the piston is housed inside the cylinder and can move within the cylinder, one end of the piston rod is connected to the piston, and the other end of the piston rod extends to the outside, and further comprises a top pad and a bottom pad, wherein the top pad is disposed at the inner top of the cylinder, and the bottom pad is disposed at the inner bottom of the cylinder, and the top pad and the bottom pad are used to contact the piston.

[0007] This solution uses top and bottom pads inside the cylinder to prevent the piston from making direct hard contact with the top and bottom of the cylinder when it moves inside, thus avoiding noise and problems such as piston collision and wear.

[0008] Preferably, the top pad and / or bottom pad have an internal cavity, which is a closed cavity containing a buffer medium. This design uses the buffer medium to achieve a cushioning effect, preventing direct hard contact between the piston and the inner top and bottom of the cylinder.

[0009] Preferably, to avoid interference between the top pad and the piston rod, the top pad in this design is annular, and the piston rod is located in the middle of the top pad.

[0010] To ensure full contact with the piston, the bottom pad described in this design is circular.

[0011] Preferably, in order to ensure that the top pad contacts the middle of the piston, the top pad in this embodiment is located at the top center of the cylinder.

[0012] Preferably, the diameter of the bottom pad is smaller than the inner diameter of the cylinder.

[0013] Preferably, a sealing structure is installed on the top of the cylinder body. The sealing structure includes a sealing cover, a sliding sleeve, balls, and a sealing ring. The sealing cover is fixedly installed on the top of the cylinder body, and a sliding sleeve is fixedly installed on the top of the sealing cover. The inner ring of the sliding sleeve is in contact with the piston rod. Balls and a sealing ring are also installed on the top of the cylinder body, and the balls and the sealing ring are in contact with the piston rod.

[0014] Preferably, a sound-absorbing block is provided between the enclosure and the cylinder body.

[0015] Preferably, the cylinder sidewall has a sandwich structure, and a sound insulation layer is installed inside the sandwich structure.

[0016] Preferably, a base is fixedly installed at the bottom of the cylinder, and a first soft pad is fixedly installed at the bottom of the base.

[0017] Preferably, a top plate is fixedly installed on the top of the piston rod, and a second soft pad is fixedly installed on the top of the top plate.

[0018] The viscous damper provided by this utility model has the following technical effects: By setting a top pad and a bottom pad inside the cylinder, the piston will not make direct hard contact with the inner top and inner bottom of the cylinder when it moves inside the cylinder, thus avoiding noise and problems such as piston collision and wear with the cylinder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the side cross-sectional structure proposed in this utility model.

[0021] Figure 3 The present utility model proposes Figure 2 Enlarged structural diagram at point A in the middle.

[0022] In the attached diagram: cylinder 1, sound insulation layer 11, piston 2, piston rod 3, base 4, first soft pad 41, top plate 5, second soft pad 51, top pad 6, bottom pad 7, enclosed structure 8, enclosed cover 81, sliding sleeve 82, ball bearing 83, sealing ring 84, sound absorbing block 85. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figure 1 and Figure 2As shown, a viscous damper includes a cylinder 1, a piston 2, and a piston rod 3. The cylinder 1 is cylindrical and contains oil. The piston 2 is housed inside the cylinder 1, dividing the interior of the cylinder 1 into upper and lower parts. The piston 2 has a connecting hole for oil to pass through. When the piston 2 moves inside the cylinder 1, the oil flows between the two parts of the cylinder 1 through the connecting hole. The outer ring of the piston 2 has an annular groove, in which a sealing ring is installed for better sealing. One end of the piston rod 3 is connected to the piston 2, and the other end of the piston rod 3 is connected to the outside.

[0026] To achieve better noise reduction, in this embodiment, a base 4 is fixedly installed at the bottom of the cylinder body 1, and a first soft pad 41 is fixedly installed at the bottom of the base 4; a top plate 5 is fixedly installed at the top of the piston rod 3, and a second soft pad 51 is fixedly installed at the top of the top plate 5. The first soft pad 41 and the second soft pad 51 reduce the noise generated by the impact between the damper and the external connecting parts. At the same time, a sandwich structure is constructed on the side wall of the cylinder body 1, and a sound insulation layer 11 is installed inside the sandwich structure. The sound insulation layer 11 can be a sound insulation material layer of existing technology. The sound insulation layer 11 achieves a sound insulation effect, reducing the noise generated by the damper.

[0027] In this embodiment, a top pad 6 and a bottom pad 7 are respectively provided at the inner top and bottom of the cylinder 1. Both the top pad 6 and the bottom pad 7 are made of rubber. The top pad 6 is annular, and its top is attached to the inner top of the cylinder 1 by means of adhesion. The bottom of the top pad 6 is used to contact the piston 2, avoiding direct hard contact between the piston 2 and the top of the cylinder 1. The piston rod 3 passes through the middle of the top pad 6 to avoid interference between the top pad 6 and the piston rod 3. The installation position of the top pad 6 is located at the middle of the inner top of the cylinder 1, that is, the diameter of the top pad 6 is smaller than the inner diameter of the cylinder 1, ensuring that the top pad 6 can contact the middle of the piston 2. The bottom pad 7 is circular, specifically cylindrical. The bottom of the bottom pad 7 is connected to the inner bottom of the cylinder 1 by adhesion, and its top is used to contact the piston 2, avoiding direct hard contact between the piston 2 and the bottom of the cylinder 1. The diameter of the bottom pad 7 is smaller than the diameter of the cylinder 1, and there is a gap between the outer ring of the bottom pad 7 and the inner wall of the cylinder 1, so that the bottom pad 7 can deform appropriately when it is in direct contact with the piston 2.

[0028] To achieve better cushioning, the top pad 6 and bottom pad 7 in this embodiment have internal cavities, which are closed bodies. These cavities contain a cushioning medium, which can be air or oil. Preferably, each cavity includes several independently separated storage spaces arranged in a ring shape. The number of storage spaces can be 3 to 6, and each storage space is closed. Because of the independent storage spaces in this embodiment, even if some storage spaces are damaged, the others can still provide proper cushioning, making it more practical.

[0029] It should be noted that: in this embodiment, it is preferred to construct a receiving cavity inside the top pad 6 and the bottom pad 7, but in some other embodiments, the top pad 6 and the bottom pad 7 may also be solid.

[0030] To achieve a sealed top for cylinder block 1, while also ensuring better noise reduction. For example... Figure 3 As shown, in this embodiment, a sealing structure 8 is installed on the top of the cylinder body 1 to prevent oil leakage. The sealing structure 8 specifically includes a sealing cover 81, a sliding sleeve 82, ball bearings 83, and a sealing ring 84. The sealing cover 81 is welded to the top of the cylinder body 1, and the sliding sleeve 82 is fixedly installed on the top of the sealing cover 81. Both the sliding sleeve 82 and the sealing cover 81 can be made of metal, such as iron, and the sliding sleeve 82 and the sealing cover 81 are preferably integrally formed. The sliding sleeve 82 is annular, and its inner ring accommodates the piston rod 3. A sound-absorbing block 85 is accommodated between the bottom of the sealing cover 81 and the top of the cylinder body 1, providing a noise reduction effect. Simultaneously, a sealing ring 84 is provided at the top of the cylinder body 1, and the sealing ring 84 contains ball bearings 83. The sealing ring 84 and the ball bearings 83 are fitted together with the piston rod 3.

[0031] In this embodiment, noise is avoided by using low friction between the piston rod 3 and the sliding sleeve 82, while the sealing ring 84 provides a seal for the cylinder 1. When the piston 2 slides inside the cylinder 1, the noise it generates is blocked by the oil and the sound insulation layer 11, reducing the noise generated by the damper and meeting the needs of places such as hospitals and precision laboratories.

[0032] The specific implementation process is described below: When the damper is working, piston 2 slides up and down inside cylinder 1. When piston 2 moves to the bottom of cylinder 1, it contacts the bottom pad 7 located at the bottom of cylinder 1, preventing hard contact between piston 2 and the bottom of cylinder 1; when piston 2 moves to the top of cylinder 1, it contacts the top pad 6 located at the bottom of cylinder 1, preventing hard contact between piston 2 and the top of cylinder 1. Simultaneously, the noise generated by piston 2 during its movement is blocked by the sound insulation layer 11, resulting in less noise from the damper.

[0033] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A viscous damper, comprising a cylinder (1), a piston (2), and a piston rod (3), wherein the cylinder (1) contains oil, the piston (2) is housed within the cylinder (1) and is used to move within the cylinder (1), one end of the piston rod (3) is connected to the piston (2), and the other end of the piston rod (3) extends to the outside, characterized in that: It also includes a top pad (6) and a bottom pad (7), the top pad (6) being disposed at the inner top of the cylinder (1) and the bottom pad (7) being disposed at the inner bottom of the cylinder (1), the top pad (6) and the bottom pad (7) being used to contact the piston (2).

2. The viscous damper according to claim 1, characterized in that, The top pad (6) and / or bottom pad (7) have internal cavities, which are closed cavities containing a buffer medium.

3. The viscous damper according to claim 1 or 2, characterized in that, The top pad (6) is annular, and the piston rod (3) is located in the inner ring of the top pad (6); and / or; The bottom pad (7) is circular.

4. The viscous damper according to claim 3, characterized in that, The top pad (6) is located at the top center of the cylinder (1).

5. The viscous damper according to claim 3, characterized in that, The diameter of the bottom pad (7) is smaller than the internal diameter of the cylinder (1).

6. The viscous damper according to claim 1, characterized in that, The cylinder body (1) is equipped with a closed structure (8) on the top. The closed structure (8) includes a closed cover (81), a sliding sleeve (82), a ball bearing (83), and a sealing ring (84). The closed cover (81) is fixedly installed on the top of the cylinder body (1). The sliding sleeve (82) is fixedly installed on the top of the closed cover (81). The inner ring of the sliding sleeve (82) is in contact with the piston rod (3). The top of the cylinder body (1) is also equipped with a ball bearing (83) and a sealing ring (84). The ball bearing (83) and the sealing ring (84) are installed in cooperation with the piston rod (3).

7. The viscous damper according to claim 6, characterized in that, A sound-absorbing block (85) is provided between the enclosure (81) and the cylinder (1).

8. The viscous damper according to claim 1, characterized in that, The cylinder body (1) has a sandwich structure on its side wall, and a sound insulation layer (11) is installed inside the sandwich.

9. The viscous damper according to claim 1, characterized in that, A base (4) is fixedly installed at the bottom of the cylinder (1), and a first soft pad (41) is fixedly installed at the bottom of the base (4).

10. The viscous damper according to claim 1, characterized in that, A top plate (5) is fixedly installed on the top of the piston rod (3), and a second soft pad (51) is fixedly installed on the top of the top plate (5).

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