Three-directional limiting type sound insulation and vibration isolation support

Abstract

The utility model discloses a three -dimensional spacing type sound resistance vibration isolation support belongs to building vibration reduction and isolation technical field. The support includes the vibration isolation rubber support upper connecting plate, vibration isolation rubber support lower connecting plate and the vibration isolation rubber support body that is overlapped vulcanization by multilayer steel sheet and rubber. Its innovation lies in, and is equipped with horizontal limiting mechanism between upper and lower connecting plate, and this mechanism is constituted by the inside and outside shear frame, and is through the polytetrafluoroethylene board on it and stainless steel plate and forms friction pair, realizes horizontal limiting and also blocks sound bridge, is equipped with still by the vertical limiting mechanism that limiting guide slot and shear bolt constitute on horizontal limiting mechanism, is provided with the pre -compression limiting mechanism of making support body be in pre -compression state on upper connecting plate. The utility model integrates horizontal and vertical limiting function, effectively insulates horizontal vibration and vertical vibration, simultaneously cuts off the noise transmission path, and the comfort and security of subway upper cover and other building structures have been improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of building seismic technology and relates to a three-dimensional limiting type acoustic damping vibration isolation bearing. Background Technology

[0002] Rubber seismic isolation bearings are widely used in various building constructions, highway bridges, and structural reinforcement. They employ multiple layers of steel plates and multiple layers of rubber, bonded together with excellent adhesion, resulting in superior horizontal performance, damping coefficient, vertical performance, and vertical load-bearing capacity. However, with the increasing prevalence of rail transit and the growing number of subway-supersed buildings, the vehicle-induced vibrations from subway trains cause vertical vibrations in these buildings, impacting comfort and generating noise. While current rubber seismic isolation bearings effectively isolate horizontal vibrations from earthquakes, their ability to reduce and isolate vertical vibrations from subway traffic is limited, and they cannot block noise transmission. This limitation restricts the application and widespread use of rubber seismic isolation bearings. Summary of the Invention

[0003] To address the aforementioned problems, this utility model provides a three-way limiting acoustic damping vibration isolation bearing. This vibration isolation bearing can enable the rubber vibration isolation bearing to have vertical vibration reduction and isolation capabilities without affecting its own vertical bearing capacity, while also achieving three-way limiting sound insulation.

[0004] According to the technical solution of this utility model: a three-dimensional limiting type acoustic damping vibration isolation bearing includes an upper connecting plate for the vibration isolation rubber bearing, a vibration isolation rubber bearing body, and a lower connecting plate for the vibration isolation rubber bearing. The upper connecting plate for the vibration isolation rubber bearing is connected to the vibration isolation rubber bearing body, and the lower connecting plate for the vibration isolation rubber bearing body is connected to the vibration isolation rubber bearing body by connecting bolts. Its characteristic is that: The vibration isolation rubber bearing body is formed by alternating layers of steel plates and multiple layers of rubber, bonded and vulcanized. A horizontal limiting mechanism is provided between the upper connecting plate and the lower connecting plate of the vibration isolation rubber bearing. The horizontal limiting mechanism includes an outer shear frame and an inner shear frame. The inner shear frame is fixedly connected to the upper connecting plate of the vibration isolation rubber bearing, and the outer shear frame is fixedly connected to the lower connecting plate of the vibration isolation rubber bearing. The inner shear frame is fitted into the cavity of the outer shear frame. A stainless steel plate is installed on the inner wall of the outer shear frame, and a polytetrafluoroethylene plate is provided on the outer surface of the inner shear frame. The polytetrafluoroethylene plate and the stainless steel plate form a friction pair. The horizontal limiting mechanism is provided with a vertical limiting mechanism, which includes a limiting guide groove formed on the outer shear frame and a shear bolt installed on the inner shear frame, with the head of the shear bolt placed in the limiting guide groove; The upper connecting plate is provided with a pre-compression limiting mechanism, which includes a pre-compression limiting bolt and a limiting plate. The pre-compression limiting bolt passes through the pre-compression limiting plate and is installed in the threaded hole of the upper connecting plate, so that the vibration isolation rubber support body is in a pre-compression state.

[0005] As a further improvement of this utility model, the outer shear frame and the inner shear frame of the horizontal limiting mechanism restrict each other, limiting the horizontal shear movement of the vibration isolation rubber support body, so that the vibration isolation rubber support body only performs vertical vibration reduction.

[0006] As a further improvement of this utility model, the polytetrafluoroethylene plate and stainless steel plate of the friction pair have a low coefficient of friction, which is used to block sound bridges and prevent noise caused by vibration from being transmitted to the upper building structure.

[0007] As a further improvement of this utility model, the pre-compression of the pre-compression limiting mechanism can offset the vertical compression displacement caused by the mass of the upper structure of the vibration isolation rubber support body in advance, and at the same time increase elasticity and stability under vibration or impact, and increase fatigue life.

[0008] As a further improvement of this utility model, the support body is made of high-performance rubber, which has a low vertical vibration isolation frequency.

[0009] The technical effect of this utility model is that the rubber bearing adopts a simple and efficient structural design. Based on the ordinary seismic isolation rubber bearing which uses multiple layers of steel plates and multiple layers of rubber alternately stacked, the thick rubber is used to optimize the structural design, so that the rubber bearing has the function of vertical vibration control.

[0010] The horizontal limiting mechanism of this rubber bearing is equipped with a friction pair consisting of a polytetrafluoroethylene plate and a stainless steel plate. This friction pair combination has a low coefficient of friction, which does not affect the vertical vibration deformation of the product. At the same time, it also acts as a sound bridge barrier, preventing noise from vibration from being transmitted to the upper building structure.

[0011] This rubber bearing adopts a three-way limiting design. The horizontal limiting mechanism provides bidirectional horizontal limiting, which restricts the horizontal shearing motion of the thick-walled rubber bearing, ensuring that the thick-walled rubber bearing only performs vertical vibration damping. At the same time, the horizontal limiting mechanism is equipped with a vertical limiting mechanism, with limiting guide grooves, which serve to limit vertical movement, resist tension, and prevent overturning.

[0012] The rubber bearing is designed with a pre-compression limiting mechanism. After a certain pressure is applied vertically to the product, the pressure is locked by the pre-compression limiting mechanism. Pre-compression can not only offset the vertical compression displacement caused by the mass of the upper structure of the bearing in advance, but also better maintain elasticity and stability under the action of vibration or impact, and increase fatigue life.

[0013] The high-performance rubber used in this rubber bearing can effectively dissipate vibration energy, has the advantage of low vertical vibration isolation frequency, more effectively controls low-frequency vibration, and has excellent aging performance, simple maintenance, and long service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0015] Figure 2 This is a side view of the present invention.

[0016] Figure 3 This is a perspective view of the present invention. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] Figure 1-3 The components include an upper connecting plate 1 for the vibration isolation rubber bearing, a vibration isolation rubber bearing body 2, a horizontal limiting mechanism 3, a polytetrafluoroethylene plate 3.1, a stainless steel plate 3.2, a shear bolt 3.3, a vertical limiting mechanism 4, a lower connecting plate 5 for the vibration isolation rubber bearing, a preload limiting mechanism 6, a preload limiting bolt 6.1, and a limiting guide groove 7.

[0020] like Figure 1-3 As shown, this utility model is a three-dimensional limiting type acoustic damping vibration isolation bearing. The overall structure of the bearing mainly consists of three core components: an upper connecting plate 1 for the vibration isolation rubber bearing, a body 2 for the vibration isolation rubber bearing, and a lower connecting plate 5 for the vibration isolation rubber bearing, which are connected by bolts. Specifically, the upper connecting plate 1 and the body 2, and the lower connecting plate 5 and the body 2, are respectively connected by connecting bolts. The upper connecting plate 1 and the lower connecting plate 5 are used to connect with the embedded parts of the building structure, fixing the entire bearing in the building structure.

[0021] The vibration isolation rubber bearing body 2 is an integral bearing formed by alternating layers of steel plates and multiple layers of rubber through a hot vulcanization process and excellent bonding. As a preferred embodiment, the vibration isolation rubber bearing body 2 adopts an optimized structural design of "thick-walled rubber" and selects high-performance rubber materials, which can effectively dissipate vibration energy and has the characteristics of low vertical vibration isolation frequency, excellent aging performance, and long service life.

[0022] A horizontal limiting mechanism 3 is provided between the upper connecting plate 1 and the lower connecting plate 5 of the vibration isolation rubber bearing. This horizontal limiting mechanism 3 is one of the key components for achieving three-way limiting, and it consists of an outer shear frame and an inner shear frame. The inner shear frame is fixedly connected to the upper connecting plate 1 of the vibration isolation rubber bearing, and the outer shear frame is fixedly connected to the lower connecting plate 5 of the vibration isolation rubber bearing. The inner shear frame is fitted within the cavity of the outer shear frame, allowing the inner and outer frames to move relative to each other while being mutually constrained. Specifically, a stainless steel plate 3.2 is installed on the inner wall of the outer shear frame, and a polytetrafluoroethylene (PTFE) plate 3.1 is installed on the outer surface of the inner shear frame. The PTFE plate 3.1 and the stainless steel plate 3.2 are tightly fitted together, forming a friction pair with a low coefficient of friction. This friction pair not only ensures low friction during relative sliding between the inner and outer frames, preventing any impact on the vertical vibration deformation of the vibration-damping rubber bearing body 2, but more importantly, it cuts off the path for sound wave transmission through direct metal-to-metal contact, playing a crucial role in blocking the "sound bridge" and effectively preventing noise from vibration from being transmitted to the upper building structure. This mechanism restricts the horizontal shearing motion of the vibration-damping rubber bearing body 2, allowing it to primarily perform vertical vibration damping, thus achieving bidirectional horizontal limiting.

[0023] A vertical limiting mechanism 4 is further provided on the horizontal limiting mechanism 3. Specifically, a vertical limiting guide groove 7 is provided on the outer shear frame, and a shear bolt 3.3 is correspondingly installed on the inner shear frame, with the head of the shear bolt 3.3 placed in the limiting guide groove 7. When the support is subjected to vertical tension or has a tendency to overturn, the head of the shear bolt 3.3 will contact the upper and lower end faces of the limiting guide groove 7, thereby playing the roles of vertical limiting, tensile resistance, and anti-overturning, and realizing vertical limiting.

[0024] A pre-compression limiting mechanism 6 is also provided on the connecting plate 1 of the vibration isolation rubber bearing. This mechanism includes a pre-compression limiting bolt 6.1 and a limiting plate. During installation, a vertical pressure is first applied to the vibration isolation rubber bearing body 2 to compress it by a predetermined amount of deformation. Then, the pre-compression limiting bolt 6.1 is passed through the limiting plate and screwed into the pre-set threaded hole on the connecting plate 1 of the vibration isolation rubber bearing and locked. In this way, the vibration isolation rubber bearing body 2 is always kept in the pre-compressed state. This pre-compression design can offset part of the vertical compression displacement caused by the mass of the building structure above the bearing in advance. At the same time, when encountering vibration or impact forces in subsequent use, it can make the bearing better maintain its elasticity and stability, significantly increasing its fatigue life.

[0025] The working principle of this utility model is as follows: When the continuous vertical vibration or seismic motion generated by subway traffic is transmitted to the support, due to the restriction of the horizontal limiting mechanism 3, the vibration isolation rubber support body 2 mainly undergoes vertical vibration compression deformation. During this process, the vibration isolation rubber support body 2 effectively consumes and isolates vibration energy through its thick rubber structure and high-performance rubber material, ensuring the comfort of people inside the building. At the same time, the friction pair composed of the polytetrafluoroethylene plate 3.1 and the stainless steel plate 3.2 in the horizontal limiting mechanism 3 effectively blocks the sound propagation path and reduces the noise transmitted to the upper building structure. The vertical limiting mechanism 4 ensures the safety and stability of the support under complex loads, while the pre-compression state further optimizes its dynamic performance and service life.

[0026] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A three-dimensional limiting type acoustic damping vibration isolation bearing, comprising an upper connecting plate (1), a vibration isolation rubber bearing body (2), and a lower connecting plate (5), wherein the upper connecting plate (1) and the vibration isolation rubber bearing body (2), and the lower connecting plate (5) and the vibration isolation rubber bearing body (2) are respectively connected by connecting bolts, characterized in that: The vibration isolation rubber bearing body (2) is formed by alternating bonding and vulcanization of multiple layers of steel plates and multiple layers of rubber; A horizontal limiting mechanism (3) is provided between the upper connecting plate (1) of the vibration isolation rubber support and the lower connecting plate (5) of the vibration isolation rubber support. The horizontal limiting mechanism (3) includes an outer shear frame and an inner shear frame. The inner shear frame is fixedly connected to the upper connecting plate (1) of the vibration isolation rubber support, and the outer shear frame is fixedly connected to the lower connecting plate (5) of the vibration isolation rubber support. The inner shear frame is fitted in the cavity of the outer shear frame. A stainless steel plate (3.2) is installed on the inner wall of the outer shear frame. A polytetrafluoroethylene plate (3.1) is provided on the outer surface of the inner shear frame. The polytetrafluoroethylene plate (3.1) and the stainless steel plate (3.2) form a friction pair. The horizontal limiting mechanism (3) is provided with a vertical limiting mechanism (4). The vertical limiting mechanism (4) includes a limiting guide groove (7) opened on the outer shear frame and a shear bolt (3.3) installed on the inner shear frame. The head of the shear bolt (3.3) is placed in the limiting guide groove (7). The upper connecting plate (1) is provided with a pre-compression limiting mechanism (6), which includes a pre-compression limiting bolt (6.1) and a limiting plate. The pre-compression limiting bolt (6.1) passes through the limiting plate and is installed in the threaded hole of the upper connecting plate (1), so that the vibration isolation rubber support body (2) is in a pre-compression state.

2. The three-dimensional limiting acoustic isolation vibration support as described in claim 1, characterized in that: The outer shear frame and the inner shear frame of the horizontal limiting mechanism (3) restrict each other, limiting the horizontal shear movement of the vibration isolation rubber support body (2), so that the vibration isolation rubber support body (2) only performs vertical vibration reduction.

3. The three-dimensional limiting acoustic isolation vibration support as described in claim 1, characterized in that: The PTFE plate (3.1) and stainless steel plate (3.2) of the friction pair have a low coefficient of friction, which is used to block sound bridges and prevent noise caused by vibration from being transmitted to the upper building structure.

4. The three-dimensional limiting acoustic isolation vibration support as described in claim 1, characterized in that: The pre-compression of the pre-compression limiting mechanism (6) can offset the vertical compression displacement caused by the mass of the upper structure of the vibration isolation rubber support body (2) in advance, and at the same time increase elasticity and stability under vibration or impact, and increase fatigue life.

5. The three-dimensional limiting acoustic isolation vibration support as described in claim 1, characterized in that: The support body (2) is made of high-performance rubber and has a low vertical vibration isolation frequency.

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