Free swinging device capable of adjusting gravity center in three directions

Abstract

The invention provides a free swing device capable of adjusting the center of gravity in three directions, and relates to the field of earthquake resistance of building structures, a top plate, a bottom plate and a swing piece, a plurality of top plate holes are formed in the bottom of the top plate and the bottom plate in an array mode, the top plate and the bottom plate are connected through four threaded rods, and the swing piece can move up and down on the surfaces of the threaded rods to adjust the center of gravity; four threaded rods can penetrate through different holes, are connected with the four plates, are fixed through nuts, are fixed on two sides of the adjustable plate through nuts, are screwed up at the upper part through flange nuts, and are supported at the lower part through flange nuts, so that the adjustment of the horizontal gravity center position of the device in the vibration experiment process is ensured; meanwhile, the position of the first adjustable plate and the position of the second adjustable plate can be adjusted up and down so as to ensure adjustment of the vertical position in the vibration experiment process, the device facilitates simulation of responses of different structures in an earthquake, meanwhile, the response of an irregular object during vibration can be simulated, and diversity, authenticity and preciseness in the vibration experiment process are enhanced.

Description

Technical Field

[0001] The invention relates to the field of earthquake resistance of building structures, and in particular to a free swinging device capable of adjusting the gravity center in three directions. Background Art

[0002] Earthquake disasters are characterized by suddenness, low predictability, and strong destructiveness. They can explode huge amounts of energy in an instant, causing great damage to all types of buildings or structures. However, the damage to independent structural objects during earthquakes is often overlooked. Based on this, the damage to independent structural objects during earthquakes has attracted the attention of many workers in the earthquake field, and the dynamic characteristics of independent objects as their center of gravity changes should not be ignored. In my country, the earthquake resistance of building structures is extremely mature. In earthquake disasters, building structures can basically survive small earthquakes, be repaired in medium earthquakes, and survive large earthquakes. However, there is little research on the characteristics of non-structural independent objects inside building structures, such as display cabinets, instruments and equipment, during earthquakes. In earthquake disasters, the damage to independent objects is often overlooked. In fact, earthquake damage to independent structures can also cause immeasurable economic losses.

[0003] As for earthquake resistance, traditional earthquake resistance mainly studies the impact and damage of earthquake motion on building structures. The research on earthquake resistance of building structures is quite mature, but it often ignores the dynamic characteristics of independent objects in earthquakes. For some buildings such as museums, hospitals, laboratories, etc., the equipment and collections in these buildings are of high value, and the losses caused by damage during an earthquake are very huge; for example, museums, the cultural relics and collections in these buildings are unique and irreplaceable, and any form of damage is often not allowed.

[0004] Current problems: There are few studies on the free swaying of independent objects under earthquakes, and even fewer studies on the response of irregular independent objects with eccentric centers of gravity during earthquakes.

[0005] Therefore, it is necessary to provide a new free swing device with adjustable three-way center of gravity to solve the above technical problems. Summary of the invention

[0006] In order to solve the technical problems that there are few studies on the free swing of independent objects under earthquakes, and even fewer studies on the response of irregular independent objects with large eccentric center of gravity during earthquakes, the present invention provides a free swing device with adjustable three-way center of gravity.

[0007] The free swinging device with adjustable three-way center of gravity provided by the present invention comprises:

[0008] The top plate and the bottom plate, each with one, are provided with twenty-five circular holes, connected to other parts by threaded rods, and the top plate is fixed in position by nuts on both sides.

[0009] There are two adjustment plates, namely adjustment plate 1 and adjustment plate 2, which are placed between the top plate and the bottom plate. The plates are provided with 81 circular holes. Screws are placed in different holes to adjust the horizontal center of gravity. The nuts on the upper and lower sides are used to adjust and fix the vertical center of gravity.

[0010] There are multiple threaded rods, and the number of threaded rods can be selected according to the needs, such as four, five, eight, etc., for connecting the bottom plate, the top plate, the first adjustment plate and the second adjustment plate;

[0011] Flange nuts, a total of sixteen, are distributed on the upper and lower sides of the adjusting plate 1 and the adjusting plate 2, and are used to fix the adjusting plate 1 and the adjusting plate 2 on the threaded rod;

[0012] Fixing nuts, a total of sixteen, are distributed on the upper and lower sides of the top plate and the bottom plate, used to fix the bottom plate to the end of the threaded rod and the top plate to the threaded rod;

[0013] Furthermore, the threaded rod can be passed through the circular holes at different positions to achieve the purpose of adjusting the horizontal center of gravity, and the vertical center of gravity can be adjusted by changing the position of the flange nut;

[0014] Furthermore, a plurality of fixing holes are provided in an array at the bottom of the top plate and the bottom plate, and the fixing holes of the top plate and the bottom plate are connected to the adjustment plate through four threaded rods;

[0015] Furthermore, a plurality of adjustment plate holes are provided in an array at the bottom of adjustment plate one and adjustment plate two, and the plurality of adjustment plate holes respectively correspond to the plurality of fixing holes, one end of the threaded rod respectively passes through the fixing hole and the adjustment plate hole, and the plurality of flange nuts are respectively located on the upper and lower sides of the adjustment plate, and the plurality of flange nuts are respectively threadedly connected to the threaded rod.

[0016] Compared with the related art, the free swinging device with adjustable three-way center of gravity provided by the present invention has the following beneficial effects:

[0017] 1. The free swing device with adjustable three-way center of gravity has a movable baffle to facilitate its up and down movement. The threaded rod can be passed through the fixed holes and adjustment plate holes at different positions to achieve the purpose of adjusting the horizontal center of gravity. At the same time, an opening design is made on the movable baffle to adjust the vertical center of gravity by changing the position of the flange nut, which is convenient for moving its horizontal center of gravity. Different objects can be fully and effectively simulated in the vibration test.

[0018] 2. The free-swinging device with adjustable three-way center of gravity significantly improves the diversity and authenticity of the results in the vibration test by designing an adjustment plate with adjustable three-way center of gravity. It is not only simple in structure and easy to install, but also conducive to the rigor of the experiment. At the same time, it is easy to adjust and increases the convenience during the experiment. It is of great significance for studying the movement laws of independent objects during earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the free swing device with adjustable three-way center of gravity provided by the present invention is schematically shown. Figure 1 ;

[0020] Figure 2 The overall structure of the free swing device with adjustable three-way center of gravity provided by the present invention is schematically shown. Figure 2 ;

[0021] Figure 3 Schematic diagram of the structure for adjusting the vertical center of gravity of the adjustable plate provided by the present invention Figure 1 ;

[0022] Figure 4 Schematic diagram of the structure for adjusting the vertical center of gravity of the adjustable plate provided by the present invention Figure 2 ;

[0023] Figure 5 A schematic diagram of the structure of the horizontal center of gravity adjustment of the adjustable plate provided by the present invention;

[0024] Figure 6 A schematic structural diagram of another embodiment of the threaded rod provided by the present invention.

[0025] Numbers in the figure: 1, top plate; 2, bottom plate; 3, top plate hole; 4, threaded rod; 5, adjustable plate one; 6, adjustable plate two; 7, flange nut; 8, adjusting plate hole; 9, anti-slip nut; 10, ordinary nut. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 , Figure 1 The overall structure of the free swing device with adjustable three-way center of gravity provided by the present invention is schematically shown. Figure 1 ; Figure 2 The overall structure of the free swing device with adjustable three-way center of gravity provided by the present invention is schematically shown. Figure 2 ; Figure 3 Schematic diagram of the structure for adjusting the vertical center of gravity of the adjustable plate provided by the present invention Figure 1 ; Figure 4 Schematic diagram of the structure for adjusting the vertical center of gravity of the adjustable plate provided by the present invention Figure 2 ; Figure 5 A schematic diagram of the structure of the horizontal center of gravity adjustment of the adjustable plate provided by the present invention; Figure 6 A schematic structural diagram of another embodiment of the threaded rod provided by the present invention.

[0028] Embodiment 1

[0029] In the specific implementation process, Figures 1 to 5 As shown, the free swinging device with adjustable three-way center of gravity provided by the present invention comprises:

[0030] There are two side plates, namely the top plate 1 and the bottom plate 2, with a cross-sectional geometric size of 200mm×200mm square and a height of 20mm, distributed at both ends of the device. Top plate holes 3 with a diameter of 10mm and a spacing of 40mm are opened on the top plate 1 and the bottom plate 2. The threaded rod 4 is passed through the top plate holes 3 opened in the top plate 1 and the bottom plate 2. The outer sides of the top plate 1 and the bottom plate 2 are embedded in the round holes with ordinary nuts 10 and connected to the threaded rod 4. The inner sides of the top plate 1 and the bottom plate 2 are connected to the threaded rod 4 with anti-slip nuts 9. The anti-slip nuts 9 and the ordinary nuts 10 also play the role of fixing the top plate 1;

[0031] There are two adjustable plates, namely, adjustable plate 1 5 and adjustable plate 2 6, which are distributed in the middle of the device. Adjustable plate 1 5 and adjustable plate 2 6 are provided with adjustment plate holes 8 with a diameter of 10 mm and a spacing of 40 mm. The threaded rod 4 is passed through the adjustment plate holes 8 opened in the adjustable plate 1 5 and adjustable plate 2 6. Both sides of the adjustable plate 1 5 and adjustable plate 2 6 are connected to the threaded rod 4 through flange nuts 7. The flange nuts 7 also play the role of fixing the adjustable plate 1 5 and adjustable plate 2 6;

[0032] It should be noted that the cross-sectional geometric dimensions of the top plate 1 and the bottom plate 2 are not limited to a square in the present invention, and may also be replaced with other cross-sectional shapes, such as a rectangle or a polygon.

[0033] Threaded rods 4, four in total, used to connect the bottom top plate 1, the bottom plate 2, the adjustable plate 1 5, and the adjustable plate 2 6;

[0034] Flange nuts 7, sixteen in total, are distributed on both sides of the adjustable plate 1 5 and the adjustable plate 2 6, and are used to fix the adjustable plate 1 5 and the adjustable plate 2 6;

[0035] Anti-slip nuts 9, eight in total, are distributed on the inner sides of the top plate 1 and the bottom plate 2 to fix the positions of the top plate 1 and the bottom plate 2;

[0036] Ordinary nuts 10, eight in total, are distributed on the outside of the top plate 1 and the bottom plate 2, and are embedded in the openings on the outside of the top plate 1 and the bottom plate 2 to fix the position of the top plate 1 and the bottom plate 2;

[0037] It should be understood from the above scheme that the design of the adjustable plate 1 5 and the adjustable plate 2 6 lies in the adjustment plate holes 8 opened thereon. This structure can play a role in adjusting the center of gravity. By passing the threaded rod 4 through the adjustment plate holes 8 at different positions on the adjustable plate 1 5 and the adjustable plate 2 6, the center of gravity of the device can be adjusted, which is conducive to the diversification of the vibration table experiment.

[0038] It is worth noting that top plate holes 3 are also opened on the top plate 1 and the bottom plate 2, in order to ensure the diversity of the experimental results, increase the adjustable range of the center of gravity, and further increase the diversity of the experimental results;

[0039] All plates are provided with circular holes with a diameter of 10 mm and a spacing of 40 mm. Four threaded rods 4 can pass through different holes to connect the four plates and are fixed by nuts. The threaded rods are passed through the holes at different positions of the adjustable plates and fixed with nuts on both sides of the adjustable plates. The upper part is tightened with flange nuts and the lower part is supported with flange nuts to ensure the adjustment of the horizontal center of gravity position of the device during the vibration test. At the same time, the adjustable plate 1 5 and the adjustable plate 2 6 can be adjusted up and down to ensure the adjustment of the vertical position during the vibration test.

[0040] Embodiment 2

[0041] In a specific implementation process, the same structure as in Example 1 is followed, and the difference from Example 1 is that reference Figure 6 As shown:

[0042] There are two adjustable plates, namely, adjustable plate 1 5 and adjustable plate 2 6, which are distributed in the middle of the device. Adjustable plate 1 5 and adjustable plate 2 6 are provided with adjustment plate holes 8 with a diameter of 10 mm and a spacing of 40 mm. The threaded rod 4 is passed through the adjustment plate holes 8 opened in the adjustable plate 1 5 and adjustable plate 2 6. Both sides of the adjustable plate 1 5 and adjustable plate 2 6 are connected to the threaded rod 4 through flange nuts 7. The flange nuts 7 also play the role of fixing the adjustable plate 1 5 and adjustable plate 2 6;

[0043] Threaded rods 4, five in total, used to connect the bottom top plate 1, the bottom plate 2, the adjustable plate 1 5, and the adjustable plate 2 6;

[0044] Flange nuts 7, eighteen in total, are distributed on both sides of the adjustable plate 1 5 and the adjustable plate 2 6, and are used to fix the adjustable plate 1 5 and the adjustable plate 2 6;

[0045] Anti-slip nuts 9, ten in total, are distributed on the inner sides of the top plate 1 and the bottom plate 2 to fix the positions of the top plate 1 and the bottom plate 2;

[0046] Ordinary nuts 10, ten in total, are distributed on the outside of the top plate 1 and the bottom plate 2, and are embedded in the openings on the outside of the top plate 1 and the bottom plate 2 to fix the position of the top plate 1 and the bottom plate 2;

[0047] It should be understood from the above scheme that the design of the adjustable plate 1 5 and the adjustable plate 2 6 lies in the adjustment plate holes 8 opened thereon. This structure can play a role in adjusting the center of gravity. By passing the threaded rod 4 through the adjustment plate holes 8 at different positions on the adjustable plate 1 5 and the adjustable plate 2 6, the center of gravity of the device can be adjusted, which is conducive to the diversification of the vibration table experiment. The number of threaded rods can be selected according to the needs.

[0048] Advantages include:

[0049] Diversity: The center of gravity can be adjusted in three directions, not only vertically but also horizontally, which can broaden the scope of experimental content;

[0050] High accuracy: It can not only simulate the sway response of regular objects under earthquake action, but also simulate the sway response of some irregular objects under earthquake action;

[0051] Economic benefits can be generated: the sway response of various independent objects under earthquake action can be simulated. For independent objects with higher value, more accurate simulation can be achieved, which is convenient for further protection measures and reduces maintenance costs;

[0052] This device is convenient for simulating the responses of different structures in earthquakes, and can also simulate the responses of irregular objects during vibration, thus enhancing the diversity, authenticity and rigor of the vibration test process.

[0053] The working principle provided by the present invention is as follows: when the present invention is implemented specifically, the ordinary nut 10, the threaded rod 4, the adjustable plate 1 5, the adjustable plate 2 6, the flange nut 7, the anti-slip nut 9, the top plate 1, and the bottom plate 2 are processed according to the construction process and standard design in the prior art, and then the top plate 1, the bottom plate 2 and the adjustable plate 1 5, the adjustable plate 2 6 are connected through the threaded rod 4, and the position of the plate is fixed by the nut. During the assembly process, the horizontal and vertical positions of the plates can be changed according to actual needs to achieve the purpose of adjusting the center of gravity.

[0054] In the description of the present invention, it should be understood that the terms "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, it should not be understood as a limitation on the present invention.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" and the like all refer to bolt connections. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to 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 present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A free-swinging device with adjustable three-way center of gravity, characterized in that: include: A top plate (1), a bottom plate (2) and a rocking member, wherein a plurality of top plate holes (3) are arranged in an array at the bottom of the top plate (1) and the bottom plate (2), the top plate (1) and the bottom plate (2) are connected via a plurality of threaded rods (4), and the rocking member can move up and down on the surface of the threaded rods (4) to adjust the center of gravity.

2. The free-swaying device with adjustable three-way center of gravity according to claim 1, characterized in that: The rocking member comprises an adjustable plate one (5), an adjustable plate two (6) and a plurality of flange nuts (7); the bottoms of the adjustable plate one (5) and the adjustable plate two (6) are both provided with a plurality of adjustment plate holes (8) in an array; the plurality of adjustment plate holes (8) respectively correspond to the plurality of top plate holes (3); one end of the threaded rod (4) respectively passes through the top plate hole (3) and the adjustment plate hole (8); the plurality of flange nuts (7) are respectively located on both sides of the adjustable plate one (5) and the adjustable plate two (6); and the plurality of flange nuts (7) are respectively threadedly connected to the threaded rod (4).

3. The free-swaying device with adjustable three-way center of gravity according to claim 2, characterized in that: The surfaces of the top plate (1) and the bottom plate (2) are connected to the threaded rod (4), and are reinforced on the inner sides of the top plate (1) and the bottom plate (2) respectively using anti-slip nuts (9), and the anti-slip nuts (9) are threadedly connected to the threaded rod (4).

4. The free-swaying device with adjustable three-way center of gravity according to claim 3, characterized in that: The cross-sectional geometrical dimensions of the top plate (1) are a square of 200 mm×200 mm, and the height of the top plate (1) is 20 mm.

5. The free-swaying device with adjustable three-way center of gravity according to claim 4, characterized in that: The cross-sectional dimension of the adjustable plate 1 (5) is a square of 400 mm x 400 mm, and the height of the adjustable plate 1 (5) is 10 mm.

6. The free-swaying device with adjustable three-way center of gravity according to claim 5, characterized in that: The threaded rod (4) is reinforced by inserting a common nut (10) into the top plate hole (3) on the outside of the two top plates (1) and the bottom plate (2).

7. The free-swaying device with adjustable three-way center of gravity according to claim 6, characterized in that: The diameter of the top plate holes (3) is 10 mm, and the spacing between adjacent top plate holes (3) is 40 mm.

8. The free-swaying device with adjustable three-way center of gravity according to claim 7, characterized in that: The diameter of the adjustment plate hole (8) is 10 mm, and the spacing between adjacent adjustment plate holes (8) is 40 mm.

Images