Viscous damper

Abstract

The viscous damper comprises a cylinder body, an end cover is fixedly installed at the top of the cylinder body, a piston rod penetrating to the bottom is arranged at the top of the end cover, and a working piston is fixedly connected to the outer surface of the piston rod in a sleeved mode. A thin flow channel and a thick flow channel which penetrate to the bottom are symmetrically formed in the top of the working piston, valve grooves are jointly formed between the inner walls of the two thin flow channels and the inner wall of the thick flow channel, and opening and closing assemblies are installed on the two valve grooves; shaft sleeves are fixedly installed at the movable ends of the two opening and closing assemblies, penetrate through the inner top wall of the valve groove, extend to the upper portion and rotate with the inner top wall in a sealed mode. According to the damper, through the power assembly, the spline shaft, the shaft sleeve, the opening and closing assembly, the valve groove, the thin flow channel and the thick flow channel, the thin flow channel or the thick flow channel can be selected to be closed according to actual requirements, so that damping force is changed, the working state of the damper can be adjusted according to actual vibration frequency, and the application range of the damper is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of viscous dampers, in particular to a viscous damper. Background Art

[0002] Viscous damper is an energy-consuming shock-absorbing device that uses a cylinder structure filled with damping medium. The reciprocating motion of the piston drives the flow of the internal medium to produce a damping effect, thereby converting kinetic energy into heat energy. It is mainly composed of a piston, a cylinder, an end cover, a damping medium and a connector. It is widely used in high-rise buildings, bridges, seismic reconstruction of building structures, anti-vibration of industrial pipeline equipment, military industry and other fields.

[0003] Most of the viscous dampers in the existing market are simple piston structures. In actual work, the working state of the damper cannot be adjusted. Different dampers need to be used in different working environments (for example, different dampers are used for two different vibration scenarios, high-frequency vibration and low-frequency vibration). The lack of versatility brings inconvenience to actual use. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a viscous damper.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a viscous damper, comprising a cylinder body, an end cover is fixedly installed on the top of the cylinder body, a piston rod is provided on the top of the end cover and extends to the bottom, and a working piston is fixedly sleeved on the outer surface of the piston rod; two thin flow channels and coarse flow channels are symmetrically opened on the top of the working piston and extend to the bottom, a valve groove is commonly opened between the inner walls of the two thin flow channels and the inner walls of the coarse flow channels, and opening and closing components are installed on the two valve grooves; shaft sleeves are fixedly installed on the movable ends of the two opening and closing components, and the shaft sleeves extend upward through the inner top wall of the valve groove and rotate in a sealed manner therewith, spline shafts are slidably inserted on the tops of the two shaft sleeves, and the spline shafts extend upward through the bottom of the end cover and rotate in a sealed manner therewith, and a power component is commonly installed between the two spline shafts.

[0006] Furthermore, the two opening and closing components both include a cam, and the cam is fixedly sleeved on the outer surface of the shaft sleeve, the outer surface of the cam is abutted against a movable valve plate, and the movable valve plate and the valve groove are sealed and slidable, and the movable valve plate moves in the valve groove to realize the opening and closing of the thin flow channel and the coarse flow channel.

[0007] Furthermore, the power assembly includes a dual-axis motor, and the dual-axis motor is fixedly installed on the top of the end cover, the two driving ends of the dual-axis motor are fixedly connected to a worm, the outer surfaces of the two worms are meshingly connected to a worm wheel, and the worm wheel is fixedly sleeved on the outer surface of the spline shaft, which can synchronously drive the two spline shafts to rotate.

[0008] Furthermore, the outer surface of the working piston abuts and slides against the inner wall of the cylinder body, so as to prevent the oil from flowing up and down through the edge of the working piston.

[0009] Furthermore, the piston rod and the end cover are sealed and slidably connected to prevent oil from leaking out of the cylinder body.

[0010] Furthermore, a protective shell is fixedly connected to the top of the end cover, and the power assembly is located inside the protective shell, and the protective shell has a protective effect on the internal power assembly.

[0011] Furthermore, two reflux holes extending to the bottom are symmetrically provided on the top of the working piston, and the two reflux holes, the thin flow channel and the thick flow channel are all equipped with one-way valves, which facilitate the oil flowing into the top of the working piston to flow back to the bottom of the working piston.

[0012] Beneficial effects of the utility model:

[0013] When the utility model is in use, the viscous damper can select a closed thin channel or a coarse channel according to actual needs through the arranged power component, spline shaft, shaft sleeve, opening and closing component, valve groove, thin channel and coarse channel, thereby changing the damping force, and can adjust the working state of the damper according to the actual vibration frequency, thereby improving the application range of the damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 : A three-dimensional diagram of the utility model;

[0016] Figure 2 : A cross-sectional view of the utility model;

[0017] Figure 3 : A partial cross-sectional view of the working piston of the utility model;

[0018] Figure 4 : Schematic diagram of the power assembly structure of the utility model;

[0019] Figure 5 : Bottom view of the working piston of the utility model.

[0020] The reference numerals are as follows:

[0021] 1. Cylinder body; 2. Protective shell; 3. Piston rod; 4. End cover; 5. Spline shaft; 6. Bushing; 7. Working piston; 8. Valve slot; 9. Thin flow channel; 10. Coarse flow channel; 11. Cam; 12. Movable valve plate; 13. Worm gear; 14. Dual-axis motor; 15. Worm; 16. Recirculation hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 5 As shown, it relates to a viscous damper, including a cylinder body 1, an end cover 4 is fixedly installed on the top of the cylinder body 1, a piston rod 3 is provided on the top of the end cover 4 and passes through the bottom, the piston rod 3 and the end cover 4 are sealed and slidable, a working piston 7 is fixedly sleeved on the outer surface of the piston rod 3, and the outer surface of the working piston 7 slides against the inner wall of the cylinder body 1.

[0024] Two thin flow channels 9 and a coarse flow channel 10 are symmetrically provided on the top of the working piston 7 and extend to the bottom. A valve groove 8 is provided between the inner walls of the two thin flow channels 9 and the inner walls of the coarse flow channel 10. Both valve grooves 8 are equipped with opening and closing components. Both opening and closing components include a cam 11, and the cam 11 is fixedly sleeved on the outer surface of the shaft sleeve 6. The outer surface of the cam 11 is abutted against a movable valve plate 12, and the movable valve plate 12 is sealed and slidable with the valve groove 8. The cam 11 drives the movable valve plate 12 to move, and the thin flow channel 9 or the coarse flow channel 10 can be closed by the movable valve plate 12.

[0025] The movable ends of the two opening and closing components are fixedly installed with shaft sleeves 6, and the shaft sleeves 6 extend upward through the inner top wall of the valve groove 8 and rotate therewith in a sealed manner. The tops of the two shaft sleeves 6 are slidably plugged with spline shafts 5, and the spline shafts 5 extend upward through the bottom of the end cover 4 and rotate therewith in a sealed manner. A power component is installed between the two spline shafts 5. The top of the end cover 4 is fixedly connected with a protective shell 2, and the power component is located on the inner side of the protective shell 2. The power component includes a dual-axis motor 14, and the dual-axis motor 14 is fixedly installed on the top of the end cover 4. The two driving ends of the dual-axis motor 14 are fixedly connected with a worm 15, and the outer surfaces of the two worms 15 are meshingly connected with a worm wheel 13, and the worm wheel 13 is fixedly sleeved on the outer surface of the spline shaft 5. The dual-axis motor 14 drives the worm 15 to rotate, and the worm 15 drives the spline shaft 5 to rotate through the worm wheel 13, and the spline shaft 5 can drive the shaft sleeve 6 to rotate.

[0026] Two reflux holes 16 extending to the bottom are symmetrically provided on the top of the working piston 7. The two reflux holes 16, the thin flow channel 9 and the coarse flow channel 10 are all equipped with one-way valves. The setting of the one-way valve can close the reflux hole 16 when the working piston 7 moves downward, and close the thin flow channel 9 and the coarse flow channel 10 when the working piston 7 moves upward.

[0027] Working principle: according to the vibration frequency, the thin flow channel 9 or the coarse flow channel 10 is selected to be enabled, the dual-axis motor 14 drives the worm 15 to rotate, the worm 15 drives the spline shaft 5 to rotate through the worm gear 13, the spline shaft 5 can drive the shaft sleeve 6 to rotate, the shaft sleeve 6 drives the movable valve plate 12 to move through the cam 11, and the thin flow channel 9 or the coarse flow channel 10 can be closed through the movable valve plate 12, so that the damping force of the damper matches the vibration frequency, and it can also be used in combination with the vibration sensor in the prior art in places where the vibration frequency often changes.

[0028] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A viscous damper, comprising a cylinder (1), characterized in that: An end cover (4) is fixedly mounted on the top of the cylinder body (1), a piston rod (3) is provided on the top of the end cover (4) and extends through the bottom, and a working piston (7) is fixedly sleeved on the outer surface of the piston rod (3); The top of the working piston (7) is symmetrically provided with two thin flow channels (9) and a thick flow channel (10) penetrating to the bottom, a valve groove (8) is provided between the inner walls of the two thin flow channels (9) and the inner wall of the thick flow channel (10), and both valve grooves (8) are equipped with an opening and closing assembly; The movable ends of the two opening and closing components are fixedly mounted with shaft sleeves (6), and the shaft sleeves (6) penetrate the inner top wall of the valve groove (8) to extend upward and rotate in a sealed manner therewith. The tops of the two shaft sleeves (6) are slidably plugged with spline shafts (5), and the spline shafts (5) penetrate the bottom of the end cover (4) to extend upward and rotate in a sealed manner therewith. A power component is installed between the two spline shafts (5).

2. A viscous damper according to claim 1, characterized in that: The two opening and closing components both comprise a cam (11), and the cam (11) is fixedly sleeved on the outer surface of the shaft sleeve (6), the outer surface of the cam (11) is in contact with a movable valve plate (12), and the movable valve plate (12) and the valve groove (8) are sealed and slidable.

3. A viscous damper according to claim 1, characterized in that: The power assembly comprises a dual-shaft motor (14), and the dual-shaft motor (14) is fixedly mounted on the top of the end cover (4), the two driving ends of the dual-shaft motor (14) are fixedly connected to a worm (15), the outer surfaces of the two worms (15) are meshingly connected to a worm wheel (13), and the worm wheel (13) is fixedly sleeved on the outer surface of the spline shaft (5).

4. A viscous damper according to claim 1, characterized in that: The outer surface of the working piston (7) abuts and slides against the inner wall of the cylinder body (1).

5. A viscous damper according to claim 1, characterized in that: The piston rod (3) and the end cover (4) are sealed and slidable.

6. A viscous damper according to claim 1, characterized in that: The top of the end cover (4) is fixedly connected to the protective shell (2), and the power assembly is located on the inner side of the protective shell (2).

7. A viscous damper according to claim 1, characterized in that: Two reflux holes (16) are symmetrically provided on the top of the working piston (7) and extend through the bottom. The two reflux holes (16), the thin flow channel (9) and the thick flow channel (10) are all equipped with one-way valves.

Images