CN213087103U

CN213087103U - Adjustable frequency modulation mass damper

Info

Publication number: CN213087103U
Application number: CN202021705952.0U
Authority: CN
Inventors: 丁志桂; 江源; 郭二朋; 王政; 黄进
Original assignee: Shanghai Yingzhong Construction Technology Co ltd
Current assignee: Shanghai Yinzhu Zhenkong Technology Development Co., Ltd.
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-04-30
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses an adjustable frequency modulation mass damper, which comprises a bottom plate, a mass block and a spring. A plurality of springs are symmetrically installed between the bottom plate and the mass block, and two ends of the spring are respectively connected with the top wall and the bottom wall of the bottom plate. The bottom wall of the mass block is fixed, the spring is provided with a square tube and a sliding rod, the bottom end of the square tube is fixed with the top wall of the bottom plate, and the bottom end of the sliding rod extends into the square tube and slides with it through the square plate connection, the inside of the mass block is provided with a first cavity. Through the setting of each structure, this scheme can conveniently adjust the tensioning force of multiple springs between the bottom plate and the mass block at the same time, so as to realize the adjustment of the natural frequency of the damper, the operation process is simple, and the normal damping and buffering of the damper is ensured. At the same time, by setting the square tube and sliding bar, it can avoid the lateral movement or shaking of the bottom plate and the mass block, making it more stable.

Description

Adjustable frequency modulation mass damper

Technical Field

The utility model relates to a attenuator technical field especially relates to a frequency modulation mass damper with adjustable.

Background

In the design of a traditional floor slab or a bridge deck, the crowd load is generally simplified into static load, and the dynamic effect of the crowd load is not considered. In practical situations, the crowd load belongs to dynamic load, and in the traditional design method, although the strength of a floor slab or a bridge deck slab is damaged due to the fact that the floor slab or the bridge deck slab cannot meet the bearing capacity requirement, the conditions of floor slab damage and casualties caused by vibration of the floor slab and the bridge deck slab sometimes occur. Along with the development of the technical level, the structures such as a long-span and long-cantilever structure and the like continuously emerge, and the problem of the comfort level of the floor slab is increasingly valued by designers. The root of the problem of the comfort level of the floor slab is that the vertical frequency of the floor slab is small, and when the vertical frequency of the floor slab is close to the walking frequency of people, the resonance phenomenon of the floor slab is easy to cause.

In order to solve the problems, Chinese scholars combine a large amount of engineering practice experiences on the basis of long-term vibration reduction technology research, and research shows that the frequency modulation mass damper (TMD) has a good vibration reduction effect on response caused by long-period narrow-band dynamic load.

Frequency modulated mass dampers (TMDs) are structural vibration systems consisting primarily of stiffness elements (springs), damping elements (dampers) and inertial masses, typically supported or suspended on a structure.

Through retrieval, the document of the Chinese patent authorization publication No. CN 204781416U discloses an adjustable frequency modulation mass damper, which comprises an upper support plate, a lower support plate and a rebound element, wherein the upper support plate is arranged above the lower support plate in parallel, the rebound element is arranged between the upper support plate and the lower support plate, and the adjustable frequency modulation mass damper also comprises an auxiliary spring arranged on the upper surface of the lower support plate; and the rigidity adjusting device is arranged on the upper supporting plate and used for adjusting the auxiliary spring, and the rigidity adjusting device is positioned right above the auxiliary spring.

The adjustable frequency modulation mass damper in the prior art has the following defects: this attenuator passes through screw rod and lock nut's the tension of adjusting coil spring between quality piece and the bottom suspension fagging of mutually supporting, and its operation process is comparatively hard, adjusts simultaneously and constructs through fixed plate and fastening screw fixed quality piece and bottom suspension fagging, and this mode is when later stage attenuator is used, unable fine shock attenuation cushioning effect that provides, and there is lateral shifting or the trend of rocking quality piece and bottom suspension fagging simultaneously, and stability is lower, therefore we propose an adjustable frequency modulation quality attenuator.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an adjustable frequency modulation mass damper.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an adjustable frequency modulation mass damper comprises a bottom plate, a mass block and springs, wherein a plurality of springs are symmetrically arranged between the bottom plate and the mass block, two ends of each spring are respectively fixed with the top wall of the bottom plate and the bottom wall of the mass block, a square tube and a slide rod are arranged in each spring, the bottom end of the square tube is fixed with the top wall of the bottom plate, the bottom end of each slide rod extends into the square tube and is in sliding connection with the square tube through the square plate, a first cavity is formed in the mass block, second cavities are symmetrically arranged on two sides of the first cavity, and the second cavities are also formed in the mass block;

the mobile jib is installed in vertical rotation in the first cavity, first bevel gear is installed to the mobile jib, every all rotate between second cavity and the first cavity and install sub-pole, the one end of sub-pole extends to in the first cavity and installs the second bevel gear with first bevel gear meshing, the other end of sub-pole extends to in the second cavity and installs third bevel gear, every the downside of second cavity all rotates and is equipped with the screwed pipe, the top of screwed pipe extends to in the second cavity and installs the fourth bevel gear with third bevel gear meshing, the top of slide bar extend to in the screwed pipe that corresponds and rather than threaded connection.

Furthermore, the top of square pipe is equipped with the opening with slide bar assorted, the diameter of opening is less than the external diameter of square plate.

Further, an inner hexagonal nut is installed at the top end of the main rod, and the top surface of the inner hexagonal nut is lower than the top wall of the mass block.

Further, the sub-rod is rotatably mounted with the mass block by two first bearings.

Further, the threaded pipe is rotatably mounted with the mass by two second bearings.

Furthermore, the top end of the sliding rod is in threaded connection with the inner wall of the threaded pipe through a fixedly installed threaded column.

Compared with the prior art, the beneficial effects of the utility model reside in that:

this scheme is through the setting of each structure, the tensioning dynamics of a plurality of springs between adjustment bottom plate and the quality piece in the time that can be convenient to the realization is to the regulation of attenuator natural frequency, and operation process is simple, guarantees the normal shock attenuation buffering effect of attenuator, can avoid bottom plate and quality piece to take place lateral shifting or rock through having set up side pipe and slide bar simultaneously, makes it more stable.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic view of the overall structure of an adjustable fm mass damper according to the present invention;

fig. 2 is an internal cross-sectional view of an adjustable fm mass damper according to the present invention;

fig. 3 is an enlarged view of a portion a of fig. 2.

In the figure: the device comprises a base plate 1, a mass block 2, a spring 3, a square tube 4, a sliding rod 5, a square plate 6, a first cavity 7, a main rod 8, a sub rod 9, a first bevel gear 10, a second bevel gear 11, a second cavity 12, a threaded tube 13, a third bevel gear 14, a fourth bevel gear 15 and a threaded column 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, an adjustable frequency modulation mass damper comprises a bottom plate 1, a mass block 2 and springs 3, wherein a plurality of springs 3 are symmetrically arranged between the bottom plate 1 and the mass block 2, two ends of each spring 3 are respectively fixed with the top wall of the bottom plate 1 and the bottom wall of the mass block 2, a square tube 4 and a slide rod 5 are arranged in each spring 3, the bottom end of each square tube 4 is fixed with the top wall of the bottom plate 1, the bottom end of each slide rod 5 extends into the square tube 4 and is in sliding connection with the square tube 4 through a square plate 6, a first cavity 7 is formed in the mass block 2, second cavities 12 are symmetrically arranged on two sides of the first cavity 7, and the second cavities 12 are also formed in;

a main rod 8 is vertically and rotatably mounted in the first cavity 7, a first bevel gear 10 is mounted on the main rod 8, a sub rod 9 is rotatably mounted between each second cavity 12 and the first cavity 7, one end of each sub rod 9 extends into the first cavity 7 and is provided with a second bevel gear 11 meshed with the first bevel gear 10, the other end of each sub rod 9 extends into the second cavity 12 and is provided with a third bevel gear 14, a threaded pipe 13 is rotatably arranged on the lower side of each second cavity 12, the top end of each threaded pipe 13 extends into the second cavity 12 and is provided with a fourth bevel gear 15 meshed with the third bevel gear 14, and the top end of the sliding rod 5 extends into the corresponding threaded pipe 13 and is in threaded connection with the threaded pipe 13.

The top end of the square tube 4 is provided with an opening matched with the slide rod 5, and the diameter of the opening is smaller than the outer diameter of the square plate 6. The bottom of the sliding rod 5 is in sliding connection with the square pipe 4 through the square plate 6, and meanwhile, the square plate 6 can be prevented from completely leaving the square pipe 4, so that limiting is realized.

An inner hexagonal nut is installed at the top end of the main rod 8, and the top surface of the inner hexagonal nut is lower than the top wall of the mass block 2. The top surface space of the mass block 2 is not occupied, and the flatness of the mass block is kept. The main rod 8 can be driven to rotate by rotating the inner hexagonal nut.

The sub-rod 9 is rotatably mounted with the mass 2 by means of two first bearings. The threaded tube 13 is rotatably mounted with the mass 2 by means of two second bearings.

The top end of the sliding rod 5 is in threaded connection with the inner wall of the threaded pipe 13 through a fixedly arranged threaded column 16.

The utility model discloses a theory of operation and use flow: the spring 3 that bottom plate 1 and quality piece 2 set up, can adjust its rate of tension, rotate the hexagon socket head cap nut and make the first bevel gear 10 of mobile jib 8 bottom mesh with the second bevel gear 11 of subrod 9 one end, thereby drive two subrods 9 and rotate, and mesh with fourth bevel gear 15 through third bevel gear 14, drive two screwed pipes 13 and rotate, its inner wall and the screw thread post 16 screw-thread fit in slide bar 5 top when screwed pipe 13 rotates, but because screwed pipe 13 rotates with quality piece 2 through the second bearing, thereby by vertical spacing, therefore when screwed pipe 13 rotates, can make the interval between quality piece 2 and the bottom plate 1 adjusted, also adjusted the amount of compression of bottom plate 1 and quality piece 2 to spring 3 simultaneously, namely the rate of tension of spring 3, thereby realize the regulation of attenuator vibration frequency.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an adjustable frequency modulation mass damper, includes bottom plate (1), quality piece (2), spring (3), its characterized in that, a plurality of springs (3) are installed to the symmetry between bottom plate (1) and quality piece (2), the both ends of spring (3) are fixed with the roof of bottom plate (1) and the diapire of quality piece (2) respectively, be equipped with square pipe (4) and slide bar (5) in spring (3), the bottom of square pipe (4) is fixed with the roof of bottom plate (1), the bottom of slide bar (5) extends to square pipe (4) in and through square plate (6) rather than sliding connection, first cavity (7) have been seted up to the inside of quality piece (2), the bilateral symmetry of first cavity (7) is equipped with second cavity (12), and second cavity (12) set up in quality piece (2) equally;

a main rod (8) is vertically and rotatably arranged in the first cavity (7), a first bevel gear (10) is arranged on the main rod (8), a sub-rod (9) is rotatably arranged between each second cavity (12) and the first cavity (7), one end of the sub-rod (9) extends into the first cavity (7) and is provided with a second bevel gear (11) which is meshed with the first bevel gear (10), the other end of the sub-rod (9) extends into the second cavity (12) and is provided with a third bevel gear (14), the lower side of each second cavity (12) is rotatably provided with a threaded pipe (13), the top end of the threaded pipe (13) extends into the second cavity (12) and is provided with a fourth bevel gear (15) meshed with the third bevel gear (14), the top end of the sliding rod (5) extends into the corresponding threaded pipe (13) and is in threaded connection with the threaded pipe.

2. Adjustable fm mass damper according to claim 1, characterized in that the top of the square tube (4) is provided with an opening matching the slide bar (5), the diameter of the opening is smaller than the outer diameter of the square plate (6).

3. Adjustable fm mass damper according to claim 1, characterized in that the top of the main rod (8) is fitted with an internal hexagonal nut, the top surface of which is lower than the top wall of the mass (2).

4. Adjustable tuned mass damper according to claim 1, characterized in that the sub-rod (9) is rotatably mounted with the mass (2) by means of two first bearings.

5. Tunable tuned mass damper according to claim 1, characterized in that the threaded tube (13) is rotatably mounted with the mass (2) by means of two second bearings.

6. Adjustable fm mass damper according to claim 1, characterized in that the top end of the sliding rod (5) is screwed to the inner wall of the threaded pipe (13) by means of a fixedly mounted threaded post (16).