Friction damper with constant pre-pressure

Abstract

The utility model belongs to the field of friction dampers, and particularly relates to a friction damper with constant pre-pressure, which comprises a base. A top plate is arranged above the base, and a springback cushioning mechanism is arranged between the base and the top plate; the springback cushioning mechanism comprises a fourth friction block, the fourth friction block is arranged at the top end of the base, the bottom end of the fourth friction block is fixedly connected with the base, a second friction block is inserted into the fourth friction block, and the fourth friction block is slidably connected with the second friction block; through the design of the springback cushioning mechanism, the function of rapid recovery is achieved, and the problems that an existing device is not provided with an assembly capable of being used for rapid springback recovery, and due to the fact that the existing device is not provided with an assembly capable of recovering the damper after the damper is compressed and subjected to friction damping, the device is prone to being damaged after being compressed are solved. And the problem that the shock cannot be quickly rebounded to the original position for the next time of shock absorption is solved, and the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of friction dampers, specifically a friction damper with constant preload. Background Technology

[0002] One existing type of friction damper with constant preload can be found in application number CN202321432389.8, which describes a friction damper for buildings. This damper includes two mounting plates. A steel base is fixedly mounted on the upper surface of the lower mounting plate. The bottom surface of the upper mounting plate is inserted into the steel base, with the bottom end of the inserted steel base penetrating its interior. A friction block is installed inside the steel base, extending into the interior of the inserted steel base and making frictional contact with the inner wall of the inserted steel base. A buffer cavity is formed between the friction block and the interior of the inserted steel base. This friction damper for buildings has a simple structure, low cost, low velocity and displacement correlation, stable performance, good cyclic durability, requires no subsequent maintenance, generates damping force even under small displacements, and will not be damaged by large earthquakes, thus eliminating the need for replacement. The hysteresis curve is essentially rectangular, resulting in significant vibration reduction. The mechanical model is simple, and structural vibration reduction analysis and design are easy and convenient.

[0003] The aforementioned device does not have a component for rapid rebound and recovery. Because the existing device does not have a component for restoring the damper after it is compressed and frictionally damped, the device cannot quickly rebound to its original position after being compressed for the next shock absorption. Therefore, a friction damper with constant preload is proposed to address the above problem. Utility Model Content

[0004] To overcome the shortcomings of existing technology, existing devices do not have components for rapid rebound and recovery. Because the damper is compressed and frictionally damped, existing devices do not have components for restoring the damper, resulting in the device being unable to quickly rebound to its original position after compression for the next shock absorption. This utility model proposes a friction damper with constant preload.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a friction damper with constant pre-pressure according to this utility model includes a base; a top plate is provided above the base, and a rebound damping mechanism is provided between the base and the top plate;

[0006] The rebound damping mechanism includes a fourth friction block, which is disposed at the top of the base and the bottom of the fourth friction block is fixedly connected to the base. A second friction block is inserted inside the fourth friction block and is slidably connected to the fourth friction block. A first friction block is fixedly connected to the top of the base. The inner wall of the second friction block is sleeved on the outer side of the first friction block and is slidably connected to the first friction block. The bottom ends of second return springs are also fixedly connected to the left and right sides of the top of the first friction block. The top of the second return springs is fixedly connected to the bottom of the top plate.

[0007] Preferably, a third friction block is fixedly connected to the bottom end of the top plate. The third friction block is inserted inside the first friction block and is slidably connected to the first friction block. The top ends of the first reset springs are also fixedly connected to the left and right sides of the bottom end of the third friction block. The bottom end of the first reset spring is fixedly connected to a base.

[0008] Preferably, the front and rear ends of the left and right sides of the top of the base are also fixedly connected to the fixing blocks, the inner wall of the fixing blocks is fixedly connected to the fixing rods, and the front and rear ends of the outer sides of the fixing rods are also fitted with movable blocks, and the fixing rods are slidably connected to the movable blocks.

[0009] Preferably, a third return spring is also sleeved at both the front and rear ends of the outer side of the fixed rod. One end of the third return spring is fixedly connected to a fixed block, and the other end of the third return spring is fixedly connected to a moving block.

[0010] Preferably, a first fixed seat is fixedly connected to the top of the movable block, one end of a first push rod is rotatably connected to the outside of the first fixed seat, a second fixed seat is rotatably connected to the other end of the first push rod, and a top plate is fixedly connected to the top of the second fixed seat.

[0011] Preferably, a third fixed seat is fixedly connected to the bottom end of the movable block, one end of a second push rod is rotatably connected to the third fixed seat, the other end of the second push rod is rotatably connected to a fourth fixed seat, and a base is fixedly connected to the bottom end of the fourth fixed seat.

[0012] The advantages of this utility model are:

[0013] 1. This utility model achieves the function of rapid recovery through the structural design of the shock-absorbing mechanism, which solves the problem that the existing device does not have a component for rapid rebound recovery. Because the damper is compressed and frictionally damped, the existing device does not have a component for the damper to recover, which leads to the device being unable to quickly rebound to its original position after being compressed for the next shock absorption, thus improving its practicality.

[0014] 2. This utility model achieves the function of increasing the damping effect through the structural design of the damping mechanism. It solves the problem that existing devices rely solely on friction blocks for damping when performing friction damping, resulting in a simple structure that cannot effectively cope with large vibrations during use, thus improving the damping effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial cross-sectional structural diagram of the present invention;

[0018] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0019] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point B.

[0020] In the diagram: 1. Base; 2. Top plate; 10. First friction block; 11. Second friction block; 12. Third friction block; 13. First return spring; 14. Second return spring; 15. Fixed block; 16. Fixed rod; 17. Moving block; 18. Third return spring; 19. First fixed seat; 20. First push rod; 21. Second fixed seat; 22. Third fixed seat; 23. Second push rod; 24. Fourth fixed seat; 25. Fourth friction block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figures 1-4 As shown, a friction damper with constant preload includes a base 1; a top plate 2 is provided above the base 1, and a rebound damping mechanism is provided between the base 1 and the top plate 2.

[0023] The rebound damping mechanism includes a fourth friction block 25, which is located at the top of the base 1 and the bottom of the fourth friction block 25 is welded to the base 1. A second friction block 11 is inserted inside the fourth friction block 25 and is slidably connected to the second friction block 11. Both the second friction block 11 and the fourth friction block 25 are square. A first friction block 10 is welded to the top of the base 1. The inner wall of the second friction block 11 is fitted onto the outer side of the first friction block 10 and is slidably connected to the first friction block 10. The bottom of the second return spring 14 is also welded to the left and right sides of the top of the first friction block 10. The bottom of the top plate 2 is welded to the top of the second return spring 14.

[0024] During operation, when the top plate 2 moves towards the base 1, it causes the outer side of the second friction block 11 to rub against the inner wall of the fourth friction block 25 and move downwards. The inner wall of the second friction block 11 also rubs downwards along the outer side of the first friction block 10. When the top plate 2 moves, it causes the second return spring 14 to retract and dampen.

[0025] Furthermore, a third friction block 12 is welded together at the bottom of the top plate 2. The third friction block 12 is inserted inside the first friction block 10 and is slidably connected to the first friction block 10. The top of the first reset spring 13 is also welded together on the left and right sides of the bottom of the third friction block 12. The bottom of the first reset spring 13 is welded together with the base 1. The third friction block 12 has a square design.

[0026] During operation, the outer side of the third friction block 12 moves along the inner wall of the first friction block 10 to reduce friction and vibration, and the third friction block 12 squeezes the first reset spring 13 to perform shock absorption and contraction.

[0027] Furthermore, the front and rear ends of the left and right sides of the top of the base 1 are also welded together with fixing blocks 15, the inner walls of fixing blocks 15 are welded together with fixing rods 16, the front and rear ends of the outer side of fixing rods 16 are also fitted with moving blocks 17, and the fixing rods 16 are slidably connected to the moving blocks 17. The fixing rods 16 are designed as round rods.

[0028] When in operation, the moving block 17 moves along the outside of the fixing rod 16 fixed to the inner wall of the fixing block 15.

[0029] Furthermore, a third return spring 18 is also sleeved on the front and rear ends of the outer side of the fixing rod 16. A fixing block 15 is welded to one end of the third return spring 18, and a moving block 17 is welded to the other end of the third return spring 18. The moving block 17 is square in design.

[0030] When in operation, the moving block 17 moves, which will compress the third return spring 18 to shrink and dampen the shock. After the shrinkage and damping ends, the rebound force of the second return spring 14, the first return spring 13 and the third return spring 18 will drive the top plate 2 to return to its original position.

[0031] Furthermore, a first fixed seat 19 is welded to the top of the movable block 17. One end of the first push rod 20 is rotatably connected to the outside of the first fixed seat 19. The other end of the first push rod 20 is rotatably connected to the second fixed seat 21. A top plate 2 is welded to the top of the second fixed seat 21. The inner wall of the first push rod 20 is designed to be circular.

[0032] During operation, the top plate 2 moves, causing the second fixed seat 21 to move simultaneously. When the second fixed seat 21 moves downward, it causes the first push rod 20 to rotate along the outer side of the second fixed seat 21 and simultaneously rotates along the outer side of the first fixed seat 19, pushing the moving block 17 to move along with it.

[0033] Furthermore, a third fixed seat 22 is welded to the bottom of the movable block 17. One end of the second push rod 23 is rotatably connected to the third fixed seat 22. The other end of the second push rod 23 is rotatably connected to the fourth fixed seat 24. A base 1 is welded to the bottom of the fourth fixed seat 24. The inner wall of the second push rod 23 is circular.

[0034] During operation, the movable block 17 moves, which in turn moves the third fixed seat 22. When the third fixed seat 22 moves, it causes the second push rod 23 to rotate and move along the outer side of the third fixed seat 22. The other end of the second push rod 23 rotates along the outer side of the fourth fixed seat 24.

[0035] Working principle: When the generated vibration causes the top plate 2 to move towards the base 1, it drives the outer side of the second friction block 11 to rub downwards against the inner wall of the fourth friction block 25. Simultaneously, the inner wall of the second friction block 11 rubs downwards along the outer side of the first friction block 10. As the top plate 2 moves, it causes the second return spring 14 to retract and dampen, simultaneously causing the outer side of the third friction block 12 to move along the inner wall of the first friction block 10 for friction and vibration reduction. The third friction block 12 also compresses the first return spring 13 for damping and retraction. Furthermore, as the top plate 2 moves, it causes the second fixed seat 21 to move simultaneously. When the second fixed seat 21 moves downwards, it causes the first push rod 20 to rotate along the outer side of the second fixed seat 21, and simultaneously... The outer side of the fixed seat 19 rotates, pushing the moving block 17 to move along it. When the moving block 17 moves, it will move along the outer side of the fixed rod 16 fixed on the inner wall of the fixed block 15. When the moving block 17 moves, it will drive the third fixed seat 22 to move. When the third fixed seat 22 moves, it will drive the second push rod 23 to rotate and move along the outer side of the third fixed seat 22. The other end of the second push rod 23 will rotate along the outer side of the fourth fixed seat 24. At the same time, when the moving block 17 moves, it will squeeze the third return spring 18 to shrink and dampen. After the shrinking and damping is completed, the rebound force of the second return spring 14, the first return spring 13 and the third return spring 18 will drive the top plate 2 to return to its original position.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A friction damper with constant preload, comprising a base (1); characterized in that: A top plate (2) is provided above the base (1), and a rebound damping mechanism is provided between the base (1) and the top plate (2); The rebound damping mechanism includes a fourth friction block (25), which is set at the top of the base (1) and the bottom of the fourth friction block (25) is fixedly connected to the base (1). A second friction block (11) is inserted inside the fourth friction block (25) and the fourth friction block (25) is slidably connected to the second friction block (11). A first friction block (10) is fixedly connected to the top of the base (1). The inner wall of the second friction block (11) is sleeved on the outer side of the first friction block (10) and the second friction block (11) is slidably connected to the first friction block (10). The bottom ends of the second return springs (14) are also fixedly connected to the left and right sides of the top of the first friction block (10). The bottom end of the top plate (2) is fixedly connected to the top of the second return springs (14).

2. The friction damper with constant preload according to claim 1, characterized in that: The top plate (2) is fixedly connected to the bottom end of a third friction block (12), which is inserted inside the first friction block (10) and is slidably connected to the first friction block (10). The top ends of the first reset spring (13) are also fixedly connected to the left and right sides of the bottom end of the third friction block (12), and the bottom end of the first reset spring (13) is fixedly connected to the base (1).

3. A friction damper with constant preload according to claim 2, characterized in that: The base (1) has fixed blocks (15) fixedly connected to the front and rear ends of the left and right sides of the top. The fixed blocks (15) have fixed rods (16) fixedly connected to the inner wall of the fixed blocks (15). The fixed rods (16) have movable blocks (17) sleeved on the front and rear ends of the outer side of the fixed rods (16). The fixed rods (16) are slidably connected to the movable blocks (17).

4. A friction damper with constant preload according to claim 3, characterized in that: The front and rear ends of the outer side of the fixed rod (16) are also fitted with a third return spring (18). One end of the third return spring (18) is fixedly connected to a fixed block (15), and the other end of the third return spring (18) is fixedly connected to a moving block (17).

5. A friction damper with constant preload according to claim 4, characterized in that: The top of the movable block (17) is fixedly connected to a first fixed seat (19), and one end of a first push rod (20) is rotatably connected to the outside of the first fixed seat (19). The other end of the first push rod (20) is rotatably connected to a second fixed seat (21), and the top of the second fixed seat (21) is fixedly connected to a top plate (2).

6. A friction damper with constant preload according to claim 5, characterized in that: The bottom end of the movable block (17) is fixedly connected to a third fixed seat (22), the third fixed seat (22) is rotatably connected to one end of a second push rod (23), the other end of the second push rod (23) is rotatably connected to a fourth fixed seat (24), and the bottom end of the fourth fixed seat (24) is fixedly connected to a base (1).

Images