Three-dimensional vibration isolation device for rail transit

Abstract

The present invention relates to the field of vibration and noise control technology, and discloses a three-dimensional vibration isolation device for rail transit, including an upper connecting plate, a vertical vibration isolation unit, a middle plate, a horizontal vibration isolation unit and a lower connecting plate arranged in sequence from top to bottom; wherein the vertical vibration isolation unit includes a box body and a first rubber layer, a spacer plate and a second rubber layer fixedly connected in sequence from top to bottom in the box body, one end of the box body is open, the upper connecting plate covers and is fixed on the opening, a plurality of vibration isolation springs are fixedly arranged on the first rubber layer and the second rubber layer, and a plurality of vibration isolation springs are coaxially arranged on the first rubber layer or the second rubber layer. The present invention can effectively reduce micro-vibrations induced by rail transit, effectively solve the vibration and noise problems of the upper cover structure of rail transit, and can have good vibration isolation effects on various types of vibration sources, as well as horizontal and vertical multi-dimensional vibration inputs.

Description

Technical Field

[0001] The invention relates to the technical field of vibration and noise control, and in particular to a three-dimensional vibration isolation device for rail transportation. Background Art

[0002] Earthquake is a complex three-dimensional spatial movement, including horizontal (X, Y direction) and vertical (Z direction) movement. Traditional research on seismic isolation technology mainly considers the shock absorption effect in the horizontal direction, and believes that earthquake damage is mainly caused by horizontal earthquake action, and the vertical earthquake acceleration is only equivalent to 0.65 of the horizontal acceleration. However, a large number of earthquake records show that the vertical component of earthquake action cannot be ignored in its destructive effect on buildings, especially in high-intensity areas and epicenter areas, where the vertical earthquake component is extremely obvious. On the other hand, the environmental vibration caused by the development of rail transit has an impact on people's work and life, and measures need to be taken to isolate vertical vibration. Therefore, the research on three-dimensional vibration isolation devices came into being.

[0003] At present, common three-dimensional vibration isolation devices include horizontal supports and vertical supports. The horizontal supports are rubber isolation supports, thick rubber isolation supports, friction pendulum isolation supports, etc., and the vertical supports are vertical vibration reduction devices that are one or more combinations of disc springs, coil springs, oil dampers, etc.

[0004] Unlike ordinary three-dimensional vibration isolation devices, rail transit cover structures need to face long-term and multiple vertical micro-vibrations induced by subways, and rail transit covers are generally micro-high-rise or even super-high-rise structures, and the tensile and compressive stresses borne by the bearings are relatively large. Therefore, the main features of the three-dimensional vibration isolation device used for rail transit cover structures are as follows: it can withstand long-term and multiple vertical micro-vibrations induced by subways, and has good vertical fatigue performance of the bearings; it can effectively reduce the vertical acceleration induced by subways with a wide frequency range and small vibrations, and has good vertical micro-vibration damping performance; it can withstand the large compressive stress transmitted by the cover structure, and the vertical bearing capacity meets the requirements. However, the current three-dimensional vibration isolation device is difficult to effectively reduce the vibration and noise induced by the subway and transmitted to the cover structure, making it difficult for the super-high-rise structure of the subway cover to meet the regulatory requirements for vibration and noise. Summary of the invention

[0005] In view of the above problems, an object of the present invention is to provide a three-dimensional vibration isolation device for rail transit, so as to solve the problem that the existing three-dimensional vibration isolation device is difficult to effectively reduce the vibration and noise induced by the subway and transmitted to the upper cover structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The three-dimensional vibration isolation device for rail transit of the present invention comprises: an upper connecting plate, a vertical vibration isolation unit, a middle working plate, a horizontal vibration isolation unit and a lower connecting plate which are sequentially arranged from top to bottom, wherein the vertical vibration isolation unit comprises a box body and a first rubber layer, a spacer plate and a second rubber layer which are sequentially fixedly connected from top to bottom in the box body, one end of the box body is open, the upper connecting plate is covered and fixed on the opening, a plurality of vibration isolation springs are fixedly arranged on both the first rubber layer and the second rubber layer, and the plurality of vibration isolation springs are coaxially arranged on the first rubber layer or the second rubber layer.

[0008] Preferably, the middle working plate includes a bottom plate and a support column, one end of the support column is arranged on the upper surface of the bottom plate, the other end of the support column passes through the bottom of the box and the second rubber layer and is inserted into the spacer, and there is a gap between the upper surface of the bottom plate and the bottom of the box.

[0009] Preferably, the central axis of the support column and the central axis of the vibration isolation spring are located on the same straight line.

[0010] Preferably, the vibration isolation spring is vulcanized and integrated with the first rubber layer or the second rubber layer.

[0011] Preferably, the first rubber layer is bonded to the upper connecting plate and the spacer plate by vulcanization; and the second rubber layer is bonded to the spacer plate and the bottom of the box by vulcanization.

[0012] Preferably, the lower surface of the middle working plate is bonded to the horizontal vibration isolation unit by vulcanization.

[0013] Preferably, the diameter of the first rubber layer and the diameter of the second rubber layer are both smaller than the inner diameter of the box body, and the diameter of the spacer plate is equal to the inner diameter of the box body.

[0014] Preferably, the upper surface of the spacer plate and the bottom of the box body are coaxially provided with a plurality of first annular protrusions, each of the first annular protrusions corresponds to a vibration isolation spring, and the outer diameter of the first annular protrusion is equal to the inner diameter of the corresponding vibration isolation spring, and the lower surface of the first rubber layer and the lower surface of the second rubber layer are provided with a plurality of first grooves matching the first annular protrusions, and the first annular protrusions are inserted into the first grooves.

[0015] Preferably, the lower surface of the upper connecting plate and the lower surface of the spacer plate are coaxially provided with a plurality of second annular protrusions, each of the second annular protrusions corresponds to a vibration isolation spring, and the outer diameter of the second annular protrusion is equal to the inner diameter of the corresponding vibration isolation spring, and the upper surface of the first rubber layer and the upper surface of the second rubber layer are provided with a plurality of second grooves matching the second annular protrusions, and the second annular protrusions are inserted into the second grooves.

[0016] Preferably, a first vibration isolation spring and a second vibration isolation spring are arranged on the first rubber layer, a third vibration isolation spring and a fourth vibration isolation spring are arranged on the second rubber layer, the diameter of the first vibration isolation spring is equal to the diameter of the third vibration isolation spring, the diameter of the second vibration isolation spring is equal to the diameter of the fourth vibration isolation spring, and the diameter of the first vibration isolation spring is smaller than the diameter of the second vibration isolation spring.

[0017] Compared with the prior art, the three-dimensional vibration isolation device for rail transit in the embodiment of the present invention has the following beneficial effects:

[0018] The vertical vibration isolation unit in the three-dimensional vibration isolation device for rail transit in the embodiment of the present invention utilizes a fixed rubber layer and a vibration isolation spring to effectively reduce the micro-vibration induced by rail transit, improve the vibration reduction effect, and effectively solve the vibration and noise problem of the rail transit cover structure; the present invention connects the vertical vibration isolation unit and the horizontal vibration isolation unit in series through a middle working plate to achieve the decoupling of the motion of the three-dimensional vibration isolation device in the horizontal and vertical directions, thereby realizing the functional partitioning of vertical vibration reduction and horizontal vibration isolation, meeting the requirements of vibration isolation and vibration reduction functions in different directions, and having a good vibration isolation effect on various types of vibration sources, as well as horizontal and vertical multi-dimensional vibration inputs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional appearance diagram of the three-dimensional vibration isolation device for rail transit according to an embodiment of the present invention;

[0020] Figure 2 is a cross-sectional view of the three-dimensional vibration isolation device for rail transit according to an embodiment of the present invention;

[0021] Figure 3 is a three-dimensional assembly diagram of the three-dimensional vibration isolation device for rail transit according to an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of a box body in an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of a partition plate in an embodiment of the present invention;

[0024] In the figure, 10, upper connecting plate; 20, vertical vibration isolation unit; 30, middle plate; 40, horizontal vibration isolation unit; 50, lower connecting plate; 60, upper pier; 70, lower pier;

[0025] 21. Box body; 211. First through hole; 22. First rubber layer; 221. First vibration isolation spring; 222. Second vibration isolation spring; 23. Second rubber layer; 231. Third vibration isolation spring; 232. Fourth vibration isolation spring; 233. Second through hole; 24. Spacer; 241. First annular protrusion;

[0026] 31. Base plate; 32. Support column. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] The three-dimensional vibration isolation device for rail transit of the present invention is used for vibration isolation and vibration reduction of the rail transit upper cover structure, and is arranged between the upper pier 60 and the lower pier 70, wherein the upper pier 60 refers to the pier of the rail transit upper cover structure, and the lower pier 70 refers to the pier of the rail transit.

[0029] like Figure 1 - Figure 3 As shown, a three-dimensional vibration isolation device for rail transit according to a preferred embodiment of the present invention comprises an upper connecting plate 10, a vertical vibration isolation unit 20, a middle plate 30, a horizontal vibration isolation unit 40 and a lower connecting plate 50 arranged in sequence from top to bottom, wherein the upper connecting plate 10 is connected to the upper pier 60 and can be connected by bolts; the lower connecting plate 50 is connected to the lower pier 70 and can be connected by bolts; the vertical vibration isolation unit 20 is used for vertical vibration isolation, the horizontal vibration isolation unit 40 is used for horizontal vibration isolation, and the middle plate 30 is arranged between the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40 to achieve decoupling of motion in the horizontal direction and the vertical direction, thereby achieving functional zoning of vertical vibration reduction and horizontal vibration isolation. In this embodiment, the upper connecting plate 10 and the lower connecting plate 50 are both square; in other embodiments, the upper connecting plate 10 and the lower connecting plate 50 can also be other shapes, such as rectangular or circular.

[0030] Preferably, the vertical vibration isolation unit 20 includes a box body 21, a first rubber layer 22, a second rubber layer 23 and a spacer plate 24. One end of the box body 21 is open, and the upper connecting plate 10 is covered and fixed on the opening, and the covering part can be connected by bolts; the first rubber layer 22, the spacer plate 24 and the second rubber layer 23 are fixedly connected in sequence from top to bottom in the box body 21, the first rubber layer 22 and the second rubber layer 23 are spaced apart and separated by the spacer plate 24. Preferably, the first rubber layer 22 and the upper connecting plate 10 and the spacer plate 24 are all vulcanized and bonded; the second rubber layer 23 and the spacer plate 24 and the bottom of the box body 21 are all vulcanized and bonded; a plurality of vibration isolation springs are fixedly arranged on the first rubber layer 22 and the second rubber layer 23, and the plurality of vibration isolation springs are coaxially arranged on the first rubber layer 22 or the second rubber layer 23, so that the fatigue performance of the vibration reduction spring is good, and it can effectively reduce vibration for a long time, thereby improving the vibration reduction effect. Preferably, the vibration isolation spring is vulcanized and integrated with the first rubber layer 22 or the second rubber layer 23. The vulcanization specifically refers to adding a vulcanizing agent to the first rubber layer 22 and the second rubber layer 23, respectively, so that the first rubber layer 22 and the second rubber layer 23 are respectively vulcanized and bonded to a plurality of coaxially arranged vibration isolation springs; the vibration isolation spring may be a coil spring.

[0031] In the present invention, the vertical vibration isolation unit 20 meets the vertical pressure-bearing requirements by fixing the rubber layer and the vibration isolation spring, and can effectively reduce the micro-vibration induced by rail transit, improve the vibration reduction effect, and effectively solve the vibration and noise problems of the rail transit cover structure; the present invention connects the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40 in series through the middle plate 30, so as to realize the decoupling of the motion of the three-dimensional vibration isolation device in the horizontal direction and the vertical direction, thereby realizing the functional zoning of vertical vibration reduction and horizontal vibration isolation, and meeting the vibration isolation and vibration reduction functional requirements in different directions.

[0032] like Figure 3As shown, the middle working plate 30 includes a bottom plate 31 and a support column 32, one end of the support column 32 is arranged on the upper surface of the bottom plate 31, and the other end of the support column 32 passes through the bottom of the box body 21 and the second rubber layer 23 and is inserted into the spacer plate 24, so as to effectively ensure the connection between the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40, thereby ensuring the integrity of the three-dimensional vibration isolation device; accordingly, the bottom of the box body 21 is provided with a first through hole 211 for the end of the support column 32 to pass through, and the second rubber layer 23 is provided with a second through hole 233 for the end of the support column 32 to pass through, and the apertures of the first through hole 211 and the second through hole 233 are both equal to the diameter of the support column 32; the lower surface of the spacer plate 24 is provided with a groove for the end of the support column 32 to be inserted, and the support column 32 is inserted into the groove without passing through the spacer plate 24, so that the spacer plate 24 can be supported by the support column 32. The bottom plate 31 has a certain thickness, and there is a gap between the upper surface of the bottom plate 31 and the bottom of the box body 21 to allow the vertical vibration isolation unit 20 to be vertically displaced, and the vertical vibration isolation unit 20 can move relative to the support column 32. Preferably, the lower surface of the bottom plate 31 is vulcanized and bonded to the horizontal vibration isolation unit 40.

[0033] Furthermore, the support column 32 is vertically arranged with the base plate 31, and the support column 32 is coaxially arranged with the central axis of the base plate 31; preferably, the central axis of the support column 32 and the central axis of the vibration isolation spring and the central axis of the partition plate 24 are all located on the same straight line, so that the support column 32 can be used to support the partition plate 24, thereby supporting the vertical vibration isolation unit 20.

[0034] Optionally, in this embodiment, the outer edge of the bottom plate 31 is circular, and the support column 32 is a cylinder. In other embodiments, the outer edge of the bottom plate 31 may be in other shapes, such as a square, and the support column 32 may be a square column or an elliptical column. Further, optionally, the bottom plate 31 and the support column 32 are both made of steel, and the bottom plate 31 and the support column 32 may be two independent components or may be integrally formed.

[0035] Preferably, the diameter of the first rubber layer 22 and the diameter of the second rubber layer 23 are both smaller than the inner diameter of the box body 21, so that the first rubber layer 22 and the second rubber layer 23 can be laterally deformed when subjected to vertical pressure; further, preferably, the diameter of the spacer plate 24 is equal to the inner diameter of the box body 21.

[0036] like Figure 5As shown, a plurality of first annular protrusions 241 are coaxially arranged on the upper surface of the spacer plate 24, each of the first annular protrusions 241 corresponds to a vibration isolation spring, the first annular protrusions 241 are arranged on the inner circumference of the corresponding vibration isolation spring, and the outer diameter of the first annular protrusions 241 is equal to the inner diameter of the corresponding vibration isolation spring, so that the bottom of the corresponding vibration isolation spring can be fixed by the first annular protrusions 241, and correspondingly, a plurality of first grooves matching the first annular protrusions 241 of the spacer plate 24 are arranged on the lower surface of the first rubber layer 22, and the first annular protrusions 241 of the spacer plate 24 are respectively inserted into the corresponding first grooves.

[0037] A plurality of second annular protrusions are coaxially arranged on the lower surface of the spacer plate 24, each of the second annular protrusions corresponds to a vibration isolation spring, the second annular protrusions are arranged on the inner circumference of the corresponding vibration isolation spring, and the outer diameter of the second annular protrusion is equal to the inner diameter of the corresponding vibration isolation spring, so that the top of the corresponding vibration isolation spring can be fixed by the second annular protrusion. Correspondingly, a plurality of second grooves matching the second annular protrusions of the spacer plate 24 are arranged on the upper surface of the second rubber layer 23, and the second annular protrusions of the spacer plate 24 are respectively inserted into the corresponding second grooves.

[0038] like Figure 4 As shown, one end of the box body 21 is open, and the other end is provided with a first through hole 211. A plurality of first annular protrusions 241 are coaxially provided at the bottom of the box body 21, each of the first annular protrusions 241 corresponds to a vibration isolation spring, the first annular protrusions are provided on the inner circumference of the corresponding vibration isolation spring, and the outer diameter of the first annular protrusions 241 is equal to the inner diameter of the corresponding vibration isolation spring, so that the bottom of the corresponding vibration isolation spring can be fixed by the first annular protrusions 241. Correspondingly, a plurality of first grooves matching the first annular protrusions 241 of the box body 21 are provided on the lower surface of the second rubber layer 23, and the first annular protrusions 241 of the box body 21 are respectively inserted into the corresponding first grooves.

[0039] A plurality of second annular protrusions are coaxially arranged on the lower surface of the upper connecting plate 10, each of the second annular protrusions corresponds to a vibration isolation spring, the second annular protrusions are arranged on the inner circumference of the corresponding vibration isolation spring, and the outer diameter of the second annular protrusion is equal to the inner diameter of the corresponding vibration isolation spring, so that the top of the corresponding vibration isolation spring can be fixed by the second annular protrusion. Correspondingly, a plurality of second grooves matching the second annular protrusions of the upper connecting plate 10 are arranged on the upper surface of the first rubber layer 22, and the second annular protrusions of the upper connecting plate 10 are respectively inserted into the corresponding second grooves.

[0040] In the present invention, the first annular protrusion 241 and the second annular protrusion both have a certain thickness and height. Preferably, the height of the first annular protrusion 241 is 20 mm, and the height of the second annular protrusion is 10 mm. It should be noted that in the present invention, the sum of the height of the first annular protrusion 241 and the height of the second annular protrusion is less than the height of the vibration isolation spring.

[0041] It should be noted that, in the present invention, the first annular protrusion 241 of the spacer plate 24 and the second annular protrusion of the upper connecting plate 10 have the same outer diameter, which is equal to the inner diameter of the corresponding vibration isolation spring in the first rubber layer 22; the first annular protrusion 241 of the box body 21 and the second annular protrusion of the spacer plate 24 have the same outer diameter, which is equal to the inner diameter of the corresponding vibration isolation spring in the second rubber layer 23. The inner diameters of the vibration isolation spring in the first rubber layer 22 and the vibration isolation spring in the second rubber layer 23 may be the same or different.

[0042] Optionally, a first vibration isolation spring 221 and a second vibration isolation spring 222 are provided on the first rubber layer 22, and a third vibration isolation spring 231 and a fourth vibration isolation spring 232 are provided on the second rubber layer 23, the diameter of the first vibration isolation spring 221 is equal to the diameter of the third vibration isolation spring 231, the diameter of the second vibration isolation spring 222 is equal to the diameter of the fourth vibration isolation spring 232, and the diameter of the first vibration isolation spring 221 is smaller than the diameter of the second vibration isolation spring 222. The diameter of the first rubber layer 22 is equal to the diameter of the second rubber layer 23, the first vibration isolation spring 221 and the second vibration isolation spring 222 are coaxially arranged on the first rubber layer 22, and the central axes of the first vibration isolation spring 221 and the second vibration isolation spring 222 are located on the same straight line as the central axis of the first rubber layer 22; the third vibration isolation spring 231 and the fourth vibration isolation spring 232 are coaxially arranged on the second rubber layer 23, and the central axes of the third vibration isolation spring 231 and the fourth vibration isolation spring 232 are located on the same straight line as the central axis of the second rubber layer 23. In other embodiments, the diameter of the first vibration isolation spring 221 may not be equal to the diameter of the third vibration isolation spring 231, and the diameter of the second vibration isolation spring 222 may not be equal to the diameter of the fourth vibration isolation spring 232.

[0043] Optionally, the upper connecting plate 10 is bolted to the box body 21 , specifically, the upper connecting plate 10 is bolted to the outer edge of the box body 21 ; the lower connecting plate 50 is bolted to the horizontal vibration isolation unit 40 .

[0044] It should be noted that the vertical vibration isolation unit 20 in the present invention can not only reduce the micro-vibration induced by rail transit, but also isolate the vertical vibration of earthquake.

[0045] In this embodiment, the horizontal vibration isolation unit 40 is a laminated natural rubber bearing, a laminated lead rubber bearing or a high damping rubber bearing for horizontal vibration isolation. The horizontal vibration isolation unit 40 is preferably a laminated natural rubber bearing. The laminated natural rubber bearing not only has stable and reliable performance and is widely used in the industry, but also has high vertical stiffness and vertical bearing capacity, and can provide a smaller stiffness in the horizontal direction, which is conducive to achieving a good vibration isolation effect.

[0046] In actual design, the horizontal vibration isolation unit 40 can adopt a laminated natural rubber bearing or a laminated lead rubber bearing according to the actual dynamic characteristics of the vibration-isolated upper cover structure and the vibration isolation target requirements. The laminated lead rubber bearing has a lead rod in the middle of the bearing to dissipate vibration energy.

[0047] In summary, the embodiment of the present invention provides a three-dimensional vibration isolation device for rail transit, wherein the vertical vibration isolation unit 20 utilizes a rubber layer and a vibration isolation spring that are vulcanized in one piece to effectively reduce micro-vibrations induced by rail transit, improve the vibration reduction effect, and effectively solve the vibration and noise problems of the rail transit upper cover structure; the present invention connects the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40 in series through a middle working plate 30 to achieve the decoupling of the motion of the three-dimensional vibration isolation device in the horizontal and vertical directions, thereby achieving the functional zoning of vertical vibration reduction and horizontal vibration isolation, and meeting the requirements of vibration isolation and vibration reduction functions in different directions.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A three-dimensional vibration isolation device for rail transit, It is characterized in that include: An upper connecting plate, a vertical vibration isolation unit, a middle working plate, a horizontal vibration isolation unit and a lower connecting plate are sequentially arranged from top to bottom; The vertical vibration isolation unit comprises a box body and a first rubber layer, a spacer plate and a second rubber layer fixedly connected in sequence from top to bottom in the box body, one end of the box body is open, the upper connecting plate is covered and fixed on the opening, a plurality of vibration isolation springs are fixedly arranged on the first rubber layer and the second rubber layer, and the plurality of vibration isolation springs are coaxially arranged on the first rubber layer or the second rubber layer; The middle working plate comprises a bottom plate and a support column, one end of the support column is arranged on the upper surface of the bottom plate, the other end of the support column passes through the bottom of the box and the second rubber layer and is inserted into the spacer plate, the upper surface of the bottom plate and the bottom of the box have a gap, and the vertical vibration isolation unit can move relative to the support column as the axis; the lower surface of the spacer plate is provided with a groove for the end of the support column to be inserted, the support column is inserted into the groove without passing through the spacer plate, so that the support column supports the spacer plate; The upper surface of the spacer plate and the bottom of the box body are coaxially provided with a plurality of first annular protrusions, each of which corresponds to a vibration isolation spring, and the outer diameter of the first annular protrusion is equal to the inner diameter of the corresponding vibration isolation spring, and the lower surface of the first rubber layer and the lower surface of the second rubber layer are provided with a plurality of first grooves matching the first annular protrusions, and the first annular protrusions are inserted into the first grooves; The lower surface of the upper connecting plate and the lower surface of the spacer plate are both coaxially provided with a plurality of second annular protrusions, each of the second annular protrusions corresponds to a vibration isolation spring, and the outer diameter of the second annular protrusion is equal to the inner diameter of the corresponding vibration isolation spring, and the upper surface of the first rubber layer and the upper surface of the second rubber layer are both provided with a plurality of second grooves matching the second annular protrusions, and the second annular protrusions are inserted into the second grooves; The diameter of the first rubber layer and the diameter of the second rubber layer are both smaller than the inner diameter of the box body, and the diameter of the spacer plate is equal to the inner diameter of the box body.

2. The three-dimensional vibration isolation device for rail transit according to claim 1, It is characterized in that The central axis of the support column and the central axis of the vibration isolation spring are located on the same straight line.

3. The three-dimensional vibration isolation device for rail transit according to claim 1, It is characterized in that The vibration isolation spring is vulcanized and integrated with the first rubber layer or the second rubber layer.

4. The three-dimensional vibration isolation device for rail transit according to claim 1, It is characterized in that The first rubber layer is bonded to the upper connecting plate and the spacer plate by vulcanization; the second rubber layer is bonded to the spacer plate and the bottom of the box by vulcanization.

5. The three-dimensional vibration isolation device for rail transit according to claim 1, It is characterized in that The lower surface of the middle working plate is vulcanized and bonded to the horizontal vibration isolation unit.

6. The three-dimensional vibration isolation device for rail transit according to claim 1, It is characterized in that A first vibration isolation spring and a second vibration isolation spring are arranged on the first rubber layer, and a third vibration isolation spring and a fourth vibration isolation spring are arranged on the second rubber layer. The diameter of the first vibration isolation spring is equal to the diameter of the third vibration isolation spring, the diameter of the second vibration isolation spring is equal to the diameter of the fourth vibration isolation spring, and the diameter of the first vibration isolation spring is smaller than the diameter of the second vibration isolation spring.

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