Low frequency resonance suppression damper

Abstract

The utility model discloses a low frequency resonance inhibiting damper relates to damper, including piston rod, piston, damping liquid through -hole and aperture adjusting assembly, the utility model discloses a piston rod, piston and damping liquid through -hole have been set up, when being squeezed and moving in, can make piston synchronous internal shift, make the high viscosity damping liquid in the second cavity internal flow into the first cavity, in this process, through the damping force of high viscosity damping liquid, can realize low frequency resonance inhibiting damping activity, improve equipment operation or use stability, at the same time, the aperture adjusting assembly has been set up in the piston rod, that is, cooperate with self -locking structure, can realize the push and pull of connecting rod flexibly, in this way, to satisfy the linkage drive of adjusting structure, make the adjusting block in the adjusting structure, cooperate with the pilot hole that has been set up in the inside of outer end, to the damping liquid through -hole overall aperture adaptability adjustment, improve its shock -absorbing adaptation range.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, specifically a low-frequency resonance suppression damper. Background Technology

[0002] A damper is a device that provides resistance to motion and reduces the energy of motion. Currently, in order to better achieve low-frequency resonance suppression and ensure the stability of products or structures, viscous dampers are generally used to meet the low-frequency resonance suppression requirement.

[0003] A viscous damper mainly consists of a piston, piston rod, cylinder, and seals. The piston divides the cylinder into two chambers, each filled with a viscous damping fluid as the damping medium. The piston has small holes or gaps between it and the cylinder to allow the damping medium to pass through. When the piston and cylinder move relative to each other, the piston compresses the damping medium in one chamber. The compressed damping medium flows through the small holes on the piston or the gaps between the piston and the cylinder to the other chamber. During high-speed flow, the damping medium converts the mechanical energy transmitted from the structure into heat energy and dissipates it, thus playing a role in vibration reduction, buffering, energy dissipation, and low-frequency resonance suppression.

[0004] A viscous damper structure with application number CN202420820696.1 includes a damping cylinder, a viscoelastic damping body sealed at the top of the cylinder, and the interior of the cylinder filled with the viscous damping body. A movable shaft passes through the middle of the viscoelastic damping body, and one end of the movable shaft extends into the viscous damping body and is provided with a movable terminal. The movable shaft is a hollow structure and has an adjusting shaft inside. One end of the adjusting shaft has an adjusting plate that abuts against the movable terminal. The movable terminal and the adjusting plate are provided with aligned damping adjustment holes. The viscoelastic damping body in this invention is an infused high-damping material with excellent vibration reduction characteristics, waterproof performance, and sealing characteristics, and has virtually no additional stiffness. The viscous damping body is a liquid-type high-damping material with excellent damping function and a simple structure. At the same time, by rotating the adjusting plate, the size of the damping adjustment hole on the movable terminal can be adjusted, thereby achieving the purpose of adjusting the damping magnitude.

[0005] In the aforementioned existing patents, the size of the damping adjustment hole is adjusted by setting an adjustment disc to meet different vibration frequencies. However, the internal adjustment method of rotating the adjustment shaft and adjustment block has a loosening problem. After the hole size adjustment is completed, there is a lack of a certain locking effect to ensure the stability of the hole size adjustment, which makes the hole size adjustment have certain problems. Utility Model Content

[0006] The purpose of this invention is to provide a low-frequency resonance suppression damper to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a low-frequency resonance suppression damper, comprising a cylinder body, a sealing end cap threadedly connected to the left side of the cylinder body, a piston rod inserted into the middle of the sealing end cap, one end of the piston rod extending into the cylinder body, and a first connecting piece connected to the other side of the piston rod, a piston connected to the end of the piston rod extending into the cylinder body, and a damping fluid passage hole opened on the outside of the piston, a second connecting piece connected to the right side of the cylinder body, a first cavity and a second cavity respectively opened on both sides of the piston and the cylinder body, and further comprising an orifice adjustment assembly disposed inside the piston, the orifice adjustment assembly comprising a self-locking structure, the self-locking structure being installed on the left side of the piston rod, a connecting rod connected to the right side of the self-locking structure, and the right side of the connecting rod being connected to the adjustment structure, a positioning shaft connected to the right end of the adjustment structure, the positioning shaft being inserted into the inside of the right side of the piston rod, and a spring being installed on the outside of the positioning shaft, the two sides of the outer end of the adjustment structure being connected to the inside of the piston.

[0008] Preferably, the self-locking structure includes a rotating sleeve, which is installed on the upper left side of the piston rod. A screw is inserted inside the rotating sleeve, and the outer side of the upper end of the screw is bolted to the rotating sleeve. A slider is threadedly connected to the outer side of the screw. The slider is slidably embedded in the guide groove, which is opened inside the moving block. A connecting rod is connected to the right end of the moving block.

[0009] Preferably, the adjustment structure includes a transmission plate, an adjustment groove, a roller, an adjustment block, and a guide hole. The transmission plate is connected to the right side of the connecting rod. An adjustment groove is provided inside the transmission plate. A roller is embedded inside the adjustment groove. The outer end of the roller is connected to the adjustment block. The adjustment block is inserted into the piston, and a guide hole is provided inside one end of the adjustment block.

[0010] Preferably, the slider is arranged in the shape of a parallelogram block, and the middle part of the slider away from the guide groove is threadedly connected to the screw.

[0011] Preferably, the guide groove is formed in an inclined groove shape along the inside of the moving block.

[0012] Preferably, the adjustment groove is formed in an inverted V-shaped groove, and rollers are movably embedded in both the upper and lower ends of the adjustment groove.

[0013] Preferably, the adjusting block extends vertically through the piston rod and penetrates into the interior of the piston.

[0014] Preferably, the diameter of the guide hole is smaller than that of the damping fluid through hole, and the opening ends on both the left and right sides of the guide hole are set in an inwardly concave arc-shaped chamfer.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model incorporates a piston rod, a piston, and a damping fluid through-hole. When compressed and moved inward, the piston moves inward synchronously, allowing the high-viscosity damping fluid from the second chamber to flow into the first chamber. During this process, the damping force of the high-viscosity damping fluid suppresses low-frequency resonance and improves the stability of equipment operation or use. Simultaneously, an orifice adjustment component is installed inside the piston rod. This component, in conjunction with a self-locking structure, allows for flexible pushing and pulling of the connecting rod, thereby satisfying the linkage drive of the adjustment structure. The adjustment block inside the adjustment structure, in conjunction with the guide hole opened at the outer end, adaptively adjusts the overall orifice diameter of the damping fluid through-hole, improving its vibration damping adaptation range.

[0017] 2. This utility model incorporates a self-locking structure. By rotating the screw inside the rotating sleeve, the screw thread drives the slider connected to its outer end, causing the slider to move up and down along the guide groove inside the moving block. This, combined with the docking and transmission effect between the slider and the guide groove, allows for flexible left and right movement of the moving block. Correspondingly, this enables the push and pull of the connecting rod, thus driving the adjustment structure. The screw drive mechanism achieves a self-locking engagement, improving the stability of the subsequent adjustment of the hole diameter and preventing loosening.

[0018] 3. This utility model incorporates an adjustment structure. When the connecting rod moves with the moving block, the transmission plate moves synchronously left and right. The adjustment groove inside the transmission plate can move the rollers embedded in the upper and lower ends relative to each other or in opposite directions through its inverted V-shaped groove. Thus, the adjustment block connected to the outer ends of the rollers on both sides can flexibly adjust the position of the guide hole inside the outer end, making it connected laterally or vertically. This satisfies the need for flexible adjustment of the diameter of the damping fluid through hole, meeting different shock absorption requirements. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a front view of the internal structure of this utility model;

[0021] Figure 3 This is a front view of the internal structure of the aperture adjustment component of this utility model;

[0022] Figure 4 This is a front view of the internal structure of the self-locking structure of this utility model;

[0023] Figure 5 This is a frontal view of the internal structure of the adjustment structure of this utility model.

[0024] In the diagram: Cylinder body-1, Sealing end cap-2, Piston rod-3, First connecting piece-4, Piston-5, Damping fluid through hole-6, Second connecting piece-7, First cavity-8, Second cavity-9, Orifice adjustment assembly-10, Self-locking structure-101, Rotating sleeve-1011, Screw-1012, Slider-1013, Guide groove-1014, Moving block-1015, Connecting rod-102, Adjustment structure-103, Transmission plate-1031, Adjustment groove-1032, Roller-1033, Adjustment block-1034, Guide hole-1035, Positioning shaft-104, Spring-105. Detailed Implementation

[0025] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0026] Please see Figures 1-2 This utility model provides a low-frequency resonance suppression damper, including a cylinder body 1. A sealing end cap 2 is threadedly connected to the left side of the cylinder body 1. A piston rod 3 is laterally movably inserted into the middle of the sealing end cap 2. The right end of the piston rod 3 extends into the cylinder body 1, and a first connecting piece 4 is connected to the left side of the piston rod 3. A piston 5 is connected to the end of the piston rod 3 that extends into the cylinder body 1, and a damping fluid through hole 6 is opened on the outside of the piston 5. A second connecting piece 7 is connected to the right side of the cylinder body 1. A first cavity 8 and a second cavity 9 are respectively opened on both sides of the piston 5 and the cylinder body 1, and both the first cavity 8 and the second cavity 9 are filled with high-viscosity damping fluid. It also includes an orifice adjustment assembly 10 located inside the piston 5.

[0027] Please see Figures 3-5 In this embodiment, the aperture adjustment assembly 10 includes a self-locking structure 101, which is installed on the left side of the piston rod 3. A connecting rod 102 is connected to the right side of the self-locking structure 101, and the connecting rod 102 is laterally movably inserted into the piston rod 3. The right side of the connecting rod 102 is connected to the adjustment structure 103, and the two outer ends of the adjustment structure 103 are connected to the inside of the piston 5. A positioning shaft 104 is laterally connected to the right end of the adjustment structure 103, and the positioning shaft 104 is inserted into the inside of the right side of the piston rod 3. This ensures the stability of the lateral movement of the adjustment structure 103. A spring 105 is installed on the outside of the positioning shaft 104. The elastic assistance of the spring 105 can speed up the reset adjustment efficiency.

[0028] The self-locking structure 101 includes a rotating sleeve 1011, which is installed on the upper left side of the piston rod 3. A screw 1012 is inserted inside the rotating sleeve 1011, and the outer side of the upper end of the screw 1012 is bolted to the rotating sleeve 1011. A slider 1013 is threadedly connected to the outer side of the screw 1012. The slider 1013 is slidably embedded in the guide groove 1014, and the guide groove 1014 is opened inside the moving block 1015. A connecting rod 102 is connected to the right end of the moving block 1015.

[0029] The adjustment structure 103 includes a transmission plate 1031, an adjustment groove 1032, a roller 1033, an adjustment block 1034, and a guide hole 1035. The transmission plate 1031 is connected to the right side of the connecting rod 102. The transmission plate 1031 has an adjustment groove 1032 inside for guiding relative or opposite vertical movement. The roller 1033 is embedded inside the adjustment groove 1032. The outer end of the roller 1033 is connected to the adjustment block 1034. The adjustment block 1034 is inserted into the piston 5, and a guide hole 1035 is opened inside one end of the adjustment block 1034.

[0030] The slider 1013 is arranged in the shape of a parallelogram block, and the middle part of the slider 1013 away from the guide groove 1014 is threadedly connected to the screw 1012. In this way, the slider 1013 can be combined with the guide groove 1014 to realize the sliding left and right push-pull transmission structure. The guide groove 1014 is opened in the shape of an inclined groove along the inside of the moving block 1015. In this way, the inclined guiding cooperation of the guide groove 1014 can ensure the smooth left and right movement of the moving block 1015.

[0031] The adjusting groove 1032 is formed by an inverted V-shaped groove, and rollers 1033 are movably embedded in the upper and lower ends of the adjusting groove 1032. This ensures that the rollers 1033 on both sides can move relative to each other or in opposite directions during the movement of the transmission plate 1031. The adjusting block 1034 extends vertically through the piston rod 3 and extends into the piston 5. Thus, the adjusting blocks 1034 on both sides can move relative to each other or in opposite directions to flexibly move vertically and change the size of the damping fluid through hole 6. The diameter of the guide hole 1035 is smaller than that of the damping fluid through hole 6, and the opening ends on both sides of the guide hole 1035 are set with concave arc-shaped chamfers to ensure the flow rate of the high-viscosity damping fluid and avoid the problem of reduced flow rate when flowing through the guide hole 1035.

[0032] The working principle is as follows:

[0033] First, the first connector 4 and the second connector 7 are respectively connected to the external mounting point. When the external equipment vibrates and squeezes the first connector 4, the piston rod 3 will move inward along the inside of the cylinder 1. When the piston rod 3 moves inward, the piston 5 installed on the outside of the piston rod 3 will move inward synchronously. During the movement of the piston 5, in conjunction with the damping fluid through hole 6 opened inside the piston 5, the high viscosity damping fluid that was originally inside the second cavity 9 can flow into the first cavity 8 through the damping fluid through hole 6. During the flow, in conjunction with the damping force of the high viscosity damping fluid, the booster of this application can greatly suppress low frequency resonance and improve the damping and vibration reduction effect of the equipment.

[0034] In order to enable the damper provided in this application to flexibly adjust the diameter of the damping fluid through hole 6 according to different low-frequency resonance suppression conditions, the screw 1012 connected inside the rotating sleeve 1011 can be rotated to drive the externally connected slider 1013. In this way, the slider 1013 will move down along the guide groove 1014 opened inside the moving block 1015 to realize the downward horizontal pushing activity. In this way, the moving block 1015 will push the connecting rod 102 connected to the right end along the left side of the piston rod 3, so that the connecting rod 102 realizes the synchronous rightward pushing of the transmission plate 1031 inside the adjustment structure 103.

[0035] When the connecting rod 102 pushes the transmission plate 1031 to the right, the transmission plate 1031 can move to the right along the inside of the piston rod 3. As the transmission plate 1031 moves to the right, the adjustment groove 1032 inside the transmission plate 1031 can drive the upper and lower rollers 1033 embedded in it through its inverted V-shaped groove, so that the upper and lower rollers 1033 can move up and down relative to each other. As the two rollers 1033 move relative to each other, the adjustment block 1034 connected to the outer end of the two rollers 1033 can move up and down relative to each other synchronously. In this way, the guide hole 1035 corresponding to the inner end of the outer end of the adjustment block 1034 moves vertically inward, so that the guide hole 1035 is adjusted from the state of being horizontally connected with the damping liquid through hole 6 to the state of being vertically connected. This reduces the overall diameter of the damping liquid through hole 6, increases the damping force of the high viscosity damping liquid passing through the damping liquid through hole 6, and further enhances the low frequency resonance suppression effect of the damper.

[0036] If the screw 1012 reverses to move the slider 1013 upward, the moving block 1015 will again move to the left and reset through the sliding transmission between the slider 1013 and the guide groove 1014. In this way, the connecting rod 102 will pull the transmission plate 1031, so that the transmission plate 1031 cooperates with the internal adjustment groove 1032 to indirectly realize the vertical movement of the two adjustment blocks 1034 in opposite directions. That is, the guide hole 1035 and the damping liquid through hole 6 are re-realized to be laterally opposite, so that the damping force of the high viscosity damping liquid is reduced, which satisfies the low frequency resonance suppression in other situations. At the same time, the screw 1012 drives the slider 1013 to move up and down, which can realize the self-locking of the subsequent hole diameter adjustment state, avoid the occurrence of loosening problems, and improve the stability of the structure.

[0037] Secondly, when the transmission plate 1031 moves to the right, the positioning and guiding cooperation can be achieved through the lateral docking effect between the right end of the positioning shaft 104 and the piston rod 3, ensuring the stability of the transmission plate 1031's lateral movement. At the same time, in conjunction with the spring 105 provided on the outside of the positioning shaft 104, the spring 105 can provide elastic rebound assistance, accelerating the subsequent reset efficiency of the transmission plate 1031.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-frequency resonance suppression damper, comprising a cylinder (1), a sealing end cap (2) threadedly connected to the left side of the cylinder (1), a piston rod (3) inserted into the middle of the sealing end cap (2), one end of the piston rod (3) extending into the cylinder (1), and a first connecting piece (4) connected to the other side of the piston rod (3), a piston (5) connected to the end of the piston rod (3) extending into the cylinder (1), and a damping fluid through hole (6) opened on the outside of the piston (5), a second connecting piece (7) connected to the right side of the cylinder (1), and a first cavity (8) and a second cavity (9) respectively opened on both sides of the piston (5) and the cylinder (1); Its features are: It also includes an aperture adjustment assembly (10) located inside the piston (5). The aperture adjustment assembly (10) includes a self-locking structure (101). The self-locking structure (101) is installed on the left side of the piston rod (3). A connecting rod (102) is connected to the right side of the self-locking structure (101). The right side of the connecting rod (102) is connected to the adjustment structure (103). A positioning shaft (104) is connected to the right end of the adjustment structure (103). The positioning shaft (104) is inserted into the inside of the right side of the piston rod (3). A spring (105) is installed on the outside of the positioning shaft (104). The two sides of the outer end of the adjustment structure (103) are connected to the inside of the piston (5).

2. The low-frequency resonance suppression damper according to claim 1, characterized in that: The self-locking structure (101) includes a rotating sleeve (1011), which is installed on the upper left side of the piston rod (3). A screw (1012) is inserted inside the rotating sleeve (1011), and the outer side of the upper end of the screw (1012) is bolted to the rotating sleeve (1011). A slider (1013) is threadedly connected to the outer side of the screw (1012). The slider (1013) is slidably embedded in the guide groove (1014), and the guide groove (1014) is opened inside the moving block (1015). A connecting rod (102) is connected to the right end of the moving block (1015).

3. The low-frequency resonance suppression damper according to claim 1, characterized in that: The adjustment structure (103) includes a transmission plate (1031), an adjustment groove (1032), a roller (1033), an adjustment block (1034), and a guide hole (1035). The transmission plate (1031) is connected to the right side of the connecting rod (102). The transmission plate (1031) has an adjustment groove (1032) inside. The roller (1033) is embedded inside the adjustment groove (1032). The outer end of the roller (1033) is connected to the adjustment block (1034). The adjustment block (1034) is inserted into the piston (5), and a guide hole (1035) is opened inside one end of the adjustment block (1034).

4. The low-frequency resonance suppression damper according to claim 2, characterized in that: The slider (1013) is arranged in a parallelogram shape, and the middle part of the slider (1013) away from the guide groove (1014) is threadedly connected to the screw (1012).

5. A low-frequency resonance suppression damper according to claim 2, characterized in that: The guide groove (1014) is opened in an inclined groove shape along the inside of the moving block (1015).

6. The low-frequency resonance suppression damper according to claim 3, characterized in that: The adjustment groove (1032) is opened in an inverted V-shaped groove, and rollers (1033) are movably embedded in the upper and lower ends of the adjustment groove (1032).

7. The low-frequency resonance suppression damper according to claim 3, characterized in that: The adjusting block (1034) extends vertically through the piston rod (3) and extends into the piston (5).

8. A low-frequency resonance suppression damper according to claim 3, characterized in that: The diameter of the guide hole (1035) is smaller than that of the damping fluid through hole (6), and the opening ends on both the left and right sides of the guide hole (1035) are set in an inwardly concave arc-shaped chamfer.

Images