Mass damper

Abstract

The mass damper comprises a top plate, an upper supporting column is arranged at the vertex angle of the lower end of the top plate, and the outer side of the lower end of a first configuration block is connected with a second configuration block which is also located below the top plate; the bottom plate is arranged under the top plate in parallel, a lower supporting column is installed at the vertex angle of the upper end of the bottom plate, and the upper end of the steel ball makes contact with the lower end face of the upper supporting column; the connecting lugs are fixedly mounted in the middle of the lower end of the bottom plate at equal angles. The invention belongs to the technical field of mass dampers, and aims to solve the problems that most mass dampers in the prior art do not have a good adjusting function, so that the overall damping effect is poor, and only external force in a single direction can be damped. The shock absorber has the technical effects that the mass change is realized by changing the number of the first configuration blocks, so that the overall natural vibration frequency is changed, the frequency adjustment is realized, and meanwhile, the overall multi-directional shock absorption can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of mass dampers, and in particular to a mass damper. Background Art

[0002] The transverse mass damper (TMD) is a vibration reduction device that effectively controls structural vibration through its unique working principle and ingenious design. It is installed between an object with a certain mass and the main structure, such as a high-rise building and a large-span bridge. When the main structure is subjected to external force, the damper will accumulate elastic potential energy due to deformation under force, and at the same time, the damper will convert part of the vibration energy into heat energy for consumption. When the elastic potential energy reaches a certain level, the mass block starts to move and adjusts the resonant frequency of the system by changing its position. The transverse mass damper can adjust its vibration frequency to near the frequency of the main structure, thereby achieving the purpose of shock absorption.

[0003] During the use of the mass damper, its actual vibration reduction effect is lower than the design expectation. Therefore, it is necessary to adjust the natural frequency of the mass damper within a certain range to achieve the best working state and meet the design requirements. However, most of the mass dampers currently do not have a good adjustment function, resulting in poor overall vibration reduction effect and uncertain external force direction. The mass damper can only reduce vibration for external forces in a single direction and cannot perform multi-directional vibration reduction, which is extremely inconvenient. Summary of the invention

[0004] To this end, the present invention provides a mass damper to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] According to a first aspect of the present invention, a mass damper comprises:

[0007] A top plate, an upper support column is provided at the top corner of the lower end of the top plate, and a first configuration block is fixedly installed in the middle of the lower end of the top plate by screws, and a second configuration block is connected to the outer side of the lower end of the first configuration block, which is also located below the top plate;

[0008] A bottom plate is arranged parallel to and directly below the top plate, and a lower support column is installed at the top corner of the upper end of the bottom plate, and a steel ball is arranged inside the upper end of the lower support column, and the upper end of the steel ball contacts the lower end surface of the upper support column;

[0009] The connecting ear is fixedly installed at an equal angle at the middle of the lower end of the bottom plate, and an inner ball head is rotatably connected to the inside of the connecting ear, and an outer ball head is adapted to be connected to the outer side of the other end of the inner ball head;

[0010] The buffer rod is fixedly mounted on the outer end of the outer ball head and is located directly below the bottom plate.

[0011] Furthermore, prefabricated threaded holes aligned with each other are formed through the interior of the top plate, the first configuration block and the second configuration block.

[0012] Furthermore, the upper support column and the lower support column are arranged in a one-to-one correspondence, and the middle parts of the ends of the upper support column and the lower support column close to the steel ball are both arranged in a curved surface.

[0013] Furthermore, a protruding structure is provided on the outer side of one end of the upper support column and the lower support column close to the steel ball.

[0014] Furthermore, a first positioning block is integrally fixedly installed in the middle of the outer side of the upper support column and the lower support column away from the steel ball, and a second positioning block adapted to the first positioning block is provided inside the top corner of the top plate.

[0015] Furthermore, a prefabricated installation hole is formed through the top corner of the lower end of the base plate, and the first positioning block is connected to the base plate in a snap-fit ​​manner through the prefabricated installation hole.

[0016] Furthermore, the first configuration blocks are stacked in sequence in the middle of the lower end of the top plate.

[0017] Furthermore, a buffer tube is sleeved on the outer side of the lower end of the buffer rod, and the buffer rod and the buffer tube are arranged between two groups of outer ball heads.

[0018] The present invention has the following advantages:

[0019] 1. Through the first configuration block, the first configuration block and the second configuration block are fixedly installed on the outer side of the lower end of the top plate by screws. The first configuration block is stacked in sequence in the middle of the lower end of the top plate. During use, the first configuration block can be installed and removed by screws. The mass change can be achieved by changing the number of the first configuration blocks, thereby changing the overall natural frequency and achieving frequency adjustment;

[0020] 2. Through the upper support column and the lower support column, when the main structure is subjected to horizontal vibration, the upper support column and the lower support column can respectively roll with the steel ball through the curved surface under the action of vibration to change the relative position of the top plate and the bottom plate, so as to facilitate the adjustment of the overall resonance frequency, and the vibration frequency can be adjusted to the vicinity of the main structure frequency, so as to achieve the purpose of shock absorption;

[0021] 3. Through the buffer rod and buffer tube, when the main structure is subjected to vertical vibration, the buffer rod can shrink inside the buffer tube to alleviate the vertical vibration. Combined with the joint action of the upper support column, the lower support column and the steel ball, the whole can achieve multi-directional shock absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1An overall diagram of a mass damper provided for some embodiments of the present invention.

[0023] Figure 2 A front view of a mass damper provided for some embodiments of the present invention.

[0024] Figure 3 An overall cross-sectional view of the connection between a first configuration block and a second configuration block of a mass damper provided in some embodiments of the present invention.

[0025] Figure 4 An overall exploded view of the connection between the inner ball head and the outer ball head of the mass damper provided in some embodiments of the present invention.

[0026] Figure 5 An overall exploded view of the connection between the first configuration block and the second configuration block of the mass damper provided in some embodiments of the present invention.

[0027] In the figure: 1, top plate, 2, upper support column, 3, first configuration block, 4, second configuration block, 5, prefabricated threaded hole, 6, bottom plate, 7, lower support column, 8, steel ball, 9, first positioning block, 10, second positioning block, 11, connecting ear, 12, inner ball head, 13, outer ball head, 14, buffer rod, 15, buffer tube, 16, prefabricated mounting hole. DETAILED DESCRIPTION

[0028] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figures 1 to 5As shown, the mass damper in the embodiment of the first aspect of the present invention comprises: an upper support column 2 is arranged at the top corner of the lower end of the top plate 1, and a first configuration block 3 is fixedly installed in the middle of the lower end of the top plate 1 by screws, and the interiors of the top plate 1, the first configuration block 3 and the second configuration block 4 are all penetrated with prefabricated threaded holes 5 aligned with each other, and the outer side of the lower end of the first configuration block 3 is connected to the second configuration block 4 which is also located below the top plate 1. During installation, the top plate 1 is installed on the lower end of the main structure so that the upper end surface of the top plate 1 contacts the lower end surface of the main structure, and at the same time, the bolts can be rotated and inserted into the prefabricated threaded holes 5 penetrated through the top plate 1, the first configuration block 3 and the second configuration block 4 in sequence, so as to facilitate the first configuration block 3 and the second configuration block 4 to be fixedly installed on the outer side of the lower end of the top plate 1. The first configuration block 3 is superimposed in sequence in the middle of the lower end of the top plate 1. During use, the first configuration block 3 can be installed and removed by screws, and the mass can be changed by changing the number of the first configuration blocks 3, thereby changing the overall natural frequency and realizing frequency adjustment;

[0031] The bottom plate 6 is arranged parallel to the bottom of the top plate 1, and a lower support column 7 is installed at the top corner of the upper end of the bottom plate 6, and a steel ball 8 is arranged inside the upper end of the lower support column 7, and the upper end of the steel ball 8 is in contact with the lower end surface of the upper support column 2, and the steel ball 8 is installed in the middle of the connection between the upper support column 2 and the lower support column 7, and the middle parts of the ends of the upper support column 2 and the lower support column 7 close to the steel ball 8 are arranged in a curved surface, and the upper support column 2 and the lower support column 7 are arranged one by one in the upper and lower directions. When the main structure is subjected to horizontal vibration, the upper support column 2 and the lower support column 7 can respectively roll with the steel ball 8 through the curved surface under the action of vibration to change the relative position of the top plate 1 and the bottom plate 6, thereby facilitating the adjustment of the overall resonance frequency, and the vibration frequency can be adjusted to the vicinity of the main structure frequency, so as to achieve the purpose of shock reduction, and at the same time, the outer sides of the ends of the upper support column 2 and the lower support column 7 close to the steel ball 8 are provided with a convex structure, which can block the steel ball 8 to prevent the steel ball 8 from falling off during the shock reduction process;

[0032] The connecting ear 11 is fixedly installed at an equal angle in the middle of the lower end of the bottom plate 6, and the inner ball head 12 is rotatably connected to the inside of the connecting ear 11, and the outer ball head 13 is adapted to be connected to the outer side of the other end of the inner ball head 12, so that the connecting ear 11 plays a better role in fixing and installing the inner ball head 12. At the same time, the buffer rod 14 is fixedly installed at the outer end of the outer ball head 13 and is located directly below the bottom plate 6. The buffer rod 14 is sleeved with a buffer tube 15 on the outer side of the lower end, and the buffer rod 14 and the buffer tube 15 are arranged between the two groups of outer ball heads 13. According to the installation method of the connecting ear 11 and the inner ball head 12, A group of inner ball heads 12 on the outer side of the lower end of the buffer tube 15 are installed with an object with a certain mass. When the main structure is subjected to vertical vibration, the buffer rod 14 can shrink inside the buffer tube 15 to alleviate the vertical vibration. Combined with the joint action of the upper support column 2, the lower support column 7 and the steel ball 8, the whole can perform multi-directional shock absorption. When the buffer rod 14 and the buffer tube 15 shrink, the outer ball head 13 can rotate on the outer side of the inner ball head 12 to ensure that the lower end of the buffer rod 14 shrinks smoothly in the buffer tube 15.

[0033] A first positioning block 9 is integrally fixedly installed in the middle part of the outer side of the upper support column 2 and the lower support column 7 away from the steel ball 8, and a second positioning block 10 compatible with the first positioning block 9 is opened inside the top corner of the top plate 1, and a prefabricated mounting hole 16 is opened through the top corner of the lower end of the bottom plate 6, and the first positioning block 9 is connected to the bottom plate 6 in a snap-fit ​​manner through the prefabricated mounting hole 16. The first positioning block 9 is respectively arranged in a one-to-one correspondence with the upper support column 2 and the lower support column 7. During assembly, the first positioning block 9 can be respectively inserted into the second positioning block 10 and the prefabricated mounting hole 16, thereby respectively playing a better assembly role for the upper support column 2 and the lower support column 7, and facilitating the installation of the upper support column 2 and the lower support column 7 at the top corners of the top plate 1 and the bottom plate 6, thereby improving the convenience of overall installation.

Claims

1. Mass damper, It is characterized in that include: A top plate (1) is provided with an upper support column (2) at a top corner of the lower end thereof, and a first configuration block (3) is fixedly mounted on the middle portion of the lower end of the top plate (1) by means of screws, and a second configuration block (4) which is also located below the top plate (1) is connected to the outer side of the lower end of the first configuration block (3); A bottom plate (6) is arranged parallel to and directly below the top plate (1), and a lower support column (7) is installed at the top corner of the upper end of the bottom plate (6), and a steel ball (8) is arranged inside the upper end of the lower support column (7), and the upper end of the steel ball (8) is in contact with the lower end surface of the upper support column (2); A connecting ear (11) is fixedly mounted at an equal angle on the middle of the lower end of the bottom plate (6), and an inner ball head (12) is rotatably connected to the interior of the connecting ear (11), and an outer ball head (13) is adapted to be connected to the outer side of the other end of the inner ball head (12); The buffer rod (14) is fixedly mounted on the outer end of the outer ball head (13) and is located directly below the bottom plate (6).

2. The mass damper according to claim 1, It is characterized in that Prefabricated threaded holes (5) aligned with each other are provided through the interior of the top plate (1), the first configuration block (3) and the second configuration block (4).

3. The mass damper according to claim 1, It is characterized in that The upper support column (2) and the lower support column (7) are arranged in a one-to-one correspondence, and the middle parts of the ends of the upper support column (2) and the lower support column (7) close to the steel ball (8) are both arranged in a curved surface.

4. The mass damper according to claim 1, It is characterized in that The outer sides of the ends of the upper support column (2) and the lower support column (7) close to the steel ball (8) are both provided with a protruding structure.

5. The mass damper according to claim 1, It is characterized in that A first positioning block (9) is integrally fixedly mounted at the middle of the outer side of the upper support column (2) and the lower support column (7) away from the steel ball (8), and a second positioning block (10) adapted to the first positioning block (9) is provided inside the top corner of the top plate (1).

6. The mass damper according to claim 1, It is characterized in that A prefabricated installation hole (16) is provided through the top corner of the lower end of the base plate (6), and the first positioning block (9) is connected to the base plate (6) in a snap-fit ​​manner via the prefabricated installation hole (16).

7. The mass damper according to claim 2, It is characterized in that The first configuration blocks (3) are arranged in a stacked manner in sequence at the middle of the lower end of the top plate (1).

8. The mass damper according to claim 1, It is characterized in that A buffer tube (15) is sleeved on the outer side of the lower end of the buffer rod (14), and the buffer rod (14) and the buffer tube (15) are arranged between two groups of outer ball heads (13).

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