A hinge-type vibration isolation device with adjustable stiffness

Abstract

This invention provides a hinge-type vibration isolation device with adjustable stiffness. It achieves vibration isolation by arranging several alternating hinge mechanisms between an upper and lower connecting plate, and installing an elastic component between every two adjacent hinge mechanisms. Locking rods are installed at the bottom of the upper connecting plate and the top of the lower connecting plate to adjust the span of the hinge mechanisms, thereby adjusting the slope of the hinge mechanisms and the tilt angle of the elastic components. The overall vertical stiffness of the vibration isolation device is determined by the vector synthesis of the normal tensile / compressive stiffness and the tangential shear stiffness of the elastic components. Since the tangential shear stiffness of the elastic components is much smaller than its normal tensile / compressive stiffness, adjusting the tilt angle of the elastic components determines the rapid adjustment of the overall vertical stiffness of the vibration isolation device. This allows for rapid and flexible adjustment of the vertical stiffness according to different vibration isolation objects and vibration source frequencies, achieving optimal vibration isolation for environmental vibrations and improving the adaptability of the vibration isolation bearing product to different working conditions.

Description

Technical Field

[0001] This invention relates to the field of building vibration isolation technology, and in particular to a hinge-type vibration isolation device with adjustable stiffness. Background Technology

[0002] my country boasts the largest number of operational and incremental transportation and power equipment in the world, with its total urban rail mileage exceeding the combined total of all other countries. Its operational and commissioning volumes of various power equipment also rank among the world's leading levels. Vibrations generated during the operation of these transportation or power equipment propagate through various media, severely impacting the normal functioning of nearby buildings or equipment, and even reducing structural durability, building comfort, and environmental quality. These issues urgently require solutions through vibration isolation technology. Vibration isolation bearings are crucial for achieving vibration isolation. Because they isolate vibration propagation, they can be flexibly installed at specific locations on the object being isolated, the vibration source, or along the propagation path, reducing the impact of vibration on the isolated object.

[0003] However, vibration isolation bearings often face a variety of vibration isolation targets with varying specifications, sizes, and masses, and the vibration source frequencies are also not uniform. Traditional rubber vibration isolation bearings, once manufactured, typically have fixed stiffness and load-bearing capacity, making it difficult to flexibly adjust the optimal vibration isolation stiffness based on specific parameters of the vibration isolation target and vibration source frequency, thus failing to achieve the best vibration isolation effect. Existing solutions often involve manufacturing a large number of different models of vibration isolation bearings for selection, which leads to low standardization and high costs for mold making and manufacturing R&D. Therefore, there is an urgent need to develop a rubber vibration isolation device with flexibly adjustable stiffness, enabling rapid and flexible adjustment of vertical stiffness according to different vibration isolation targets and vibration source frequencies, achieving optimal vibration isolation effects against environmental vibrations, and improving the adaptability of vibration isolation bearing products to different working conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a hinge-type vibration isolation device with adjustable stiffness, which can quickly and flexibly adjust the vertical stiffness according to different vibration isolation objects and vibration source frequencies.

[0005] This invention provides a hinge-type vibration isolation device with adjustable stiffness, comprising an upper connecting plate and a lower connecting plate. The top end of the lower connecting plate and the bottom end of the upper connecting plate are each provided with a plurality of slidably adjustable hinge mechanisms along their length. The hinge mechanisms at the bottom end of the upper connecting plate and the hinge mechanisms at the top end of the lower connecting plate are alternately arranged. An elastic component is installed between every two adjacent hinge mechanisms. Locking rods for locking the corresponding hinge mechanisms are installed along the length of both the upper and lower connecting plates.

[0006] Furthermore, the hinge mechanism includes a first hinge plate and a second hinge plate that are hinged to each other. An adjustable support rod is connected between the first hinge plate and the second hinge plate. The two ends of the support rod are respectively hinged to the first hinge plate and the second hinge plate. A locking rod passes through the non-hinged ends of the first hinge plate and the second hinge plate. A positioning nut for fixing the first hinge plate and the second hinge plate is installed on the locking rod.

[0007] Furthermore, the bottom end of the upper connecting plate and the top end of the lower connecting plate are both provided with grooves, and two parallel locking rods are installed in the grooves. Positioning nuts are installed on the locking rods corresponding to the two sides of the first hinge plate and the two sides of the second hinge plate.

[0008] Furthermore, both the first hinge plate and the second hinge plate have a square wave-shaped pin mother plate at their hinge ends. The pin mother plates on the first hinge plate and the pin mother plates on the second hinge plate are staggered. Both the first hinge plate and the second hinge plate have pin through holes, and a first pin is inserted into the pin through hole.

[0009] Furthermore, the non-hinged ends of both the first hinge plate and the second hinge plate are rotatably mounted with a second pin perpendicular to the locking rod. The locking rod passes through the second pin, and the groove is provided with elongated holes on both sides parallel to the locking rod. The two ends of the second pin are slidably installed in the elongated holes.

[0010] Furthermore, a third pin is installed through the middle of both the first hinge plate and the second hinge plate. Rectangular holes are symmetrically opened on the first hinge plate and the second hinge plate along the axis of the third pin. The two ends of the support rod are respectively connected to the third pin on the first hinge plate and the second hinge plate at the rectangular holes.

[0011] Furthermore, the support rod includes a threaded sleeve and threaded adjusting rods installed at both ends of the threaded sleeve, with the outer ends of the two threaded adjusting rods respectively hinged to the first hinge plate and the second hinge plate.

[0012] Furthermore, the elastic component includes two sealing plates and a rubber pad vulcanized between the two sealing plates, the sealing plates being bolted to the first hinge plate and the second hinge plate.

[0013] Furthermore, a steel plate is embedded in the rubber pad.

[0014] The advantages of the technical solution of this invention compared with the prior art are as follows: This vibration isolation device achieves vibration isolation by arranging several hinge mechanisms alternately arranged between the upper and lower connecting plates, and installing elastic components between every two adjacent hinge mechanisms. Locking rods are installed at the bottom of the upper connecting plate and the top of the lower connecting plate, allowing adjustment of the span of the hinge mechanisms, thereby adjusting the slope of the hinge mechanisms and the tilt angle of the elastic components. The overall vertical stiffness of the vibration isolation device is determined by the vector synthesis of the normal tensile / compressive stiffness and the tangential shear stiffness of the elastic components. Since the tangential shear stiffness of the elastic components is much smaller than its normal tensile / compressive stiffness, adjusting the tilt angle of the elastic components determines the rapid adjustment of the overall vertical stiffness of the vibration isolation device. It can quickly and flexibly adjust the vertical stiffness according to different vibration isolation objects and vibration source frequencies, achieving the optimal vibration isolation effect against environmental vibrations and improving the adaptability of vibration isolation bearing products to different working conditions. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a front view of the overall structure of the present invention;

[0018] Figure 3 This is a front view of the overall structure of the present invention with multiple hinge mechanisms.

[0019] Explanation of reference numerals in the attached drawings: 1-Upper connecting plate, 2-Lower connecting plate, 3-Support rod, 301-Threaded sleeve, 302-Threaded adjusting rod, 4-Locking rod, 5-First hinge plate, 6-Second hinge plate, 7-First pin, 8-Second pin, 9-Third pin, 10-Groove, 11-Rectangular hole, 12-Elongated hole, 13-Positioning nut, 14-Elastic component, 15-Pin mother plate. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only 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 are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1

[0024] like Figures 1-3 As shown, the present invention provides a hinged vibration isolation device with adjustable stiffness, including an upper connecting plate 1 and a lower connecting plate 2. The top end of the lower connecting plate 2 and the bottom end of the upper connecting plate 1 are each provided with a plurality of slidably adjustable hinge mechanisms along the length direction. The hinge mechanisms at the bottom end of the upper connecting plate 1 and the hinge mechanisms at the top end of the lower connecting plate 2 are alternately arranged. An elastic component 14 is installed between every two adjacent hinge mechanisms.

[0025] The hinge mechanism includes a first hinge plate 5 and a second hinge plate 6 that are hinged to each other. A support rod 3 is connected between the first hinge plate 5 and the second hinge plate 6. The two ends of the support rod 3 are respectively hinged to the first hinge plate 5 and the second hinge plate 6. The support rod 3 is used to provide stable support for the two hinge plates. The length of the support rod 3 is adjustable. Its structure is as follows: the support rod 3 includes a threaded sleeve 301 and threaded adjusting rods 302 installed at both ends of the threaded sleeve 301. The outer ends of the two threaded adjusting rods 302 are respectively hinged to the first hinge plate 5 and the second hinge plate 6. The specific hinge method is that a third pin 9 is installed through the middle of the first hinge plate 5 and the second hinge plate 6. Rectangular holes 11 are symmetrically opened on the first hinge plate 5 and the second hinge plate 6 along the axis of the third pin 9. The two ends of the support rod 3 are fixedly connected to the third pin 9 on the first hinge plate 5 and the second hinge plate 6 at the rectangular holes 11. The third pin 9 can rotate with the span adjustment of the two hinge plates. In use, the entire support rod 3 is extended by turning the threaded sleeve 301. In order to facilitate the length locking of the support rod 3, locking nuts can be installed on both sides of the threaded sleeve 301.

[0026] The elastic component 14 includes two sealing plates and a rubber gasket vulcanized between the two sealing plates. A steel plate is embedded in the rubber gasket (the steel plate may be omitted). The sealing plates are bolted to the first hinge plate 5 and the second hinge plate 6. Specifically, bolt through holes are made in the unopened areas of the hinge plate surface, and bolts are bolted to the threaded blind holes on the sealing plates.

[0027] Both the bottom end of the upper connecting plate 1 and the top end of the lower connecting plate 2 are provided with grooves 10. Two parallel locking rods 4 are installed in the grooves 10 to lock the corresponding hinge mechanisms. The locking rods 4 pass through the non-hinged ends of the first hinge plate 5 and the second hinge plate 6. Positioning nuts 13 are installed on the locking rods 4 on both sides of the first hinge plate 5 and the second hinge plate 6. The positions of the first hinge plate 5 and the second hinge plate 6 are locked by the positioning nuts 13, thereby locking the span and tilt angle of the entire hinge mechanism.

[0028] Both the first hinge plate 5 and the second hinge plate 6 have a square-wave-shaped pin mother plate 15 at their hinge ends. The pin mother plate 15 on the first hinge plate 5 and the pin mother plate 15 on the second hinge plate 6 are staggered. Both the first hinge plate 5 and the second hinge plate 6 have pin through holes, and a first pin 7 is inserted into the pin through holes, so that the first hinge plate 5 and the second hinge plate 6 form a hinge structure. The non-hinged ends of the first hinge plate 5 and the second hinge plate 6 are rotatably mounted with a second pin 8 perpendicular to the locking rod 4. The second pin 8 is parallel to the first pin 7 and can rotate axially. The locking rod 4 passes through the second pin 8, and the positioning nut 13 is fixed on both sides of the second pin 8, thereby fixing the hinge plate.

[0029] Both sides of the groove 10 on the first hinge plate 5 and the second hinge plate 6 are provided with elongated holes 12 parallel to the two sides of the locking rod 4. The two ends of the second pin 8 are respectively slidably installed in the elongated holes 12, so that the second pin 8 slides along the elongated holes 12 and plays a supporting role at the elongated holes 12, so as to prevent the locking rod 4 from bending due to excessive pressure.

[0030] During installation and use: Multiple hinge mechanisms with triangular sides are placed parallel and evenly spaced in the groove 10 of the lower connecting plate 2. The locking rod 4 at the same position of multiple hinge mechanisms uses the same continuous locking rod 4 to pass through the second pin 8 of each hinge mechanism in sequence, and is fixed by the positioning nut 13 in sequence. If the span of the locking rod 4 is long, it can also be formed by connecting two adjacent locking rods 4 with a connector. The connector is made of a cylindrical rod with an axial threaded through hole. After tapping the ends of adjacent locking rods 4, they are screwed into the through holes of the connector to complete the connection. The first and last ends of the continuous locking rod 4 pass through the circular through holes on the side wall of the groove 10 of the lower connecting plate 2, and are fixed by the positioning nuts 13 located on both sides of the side wall of the groove 10. The assembly method of the hinge mechanism in the upper connecting plate 1 is the same as that in the lower connecting plate 2, but the number of hinge mechanisms used is one less than the number of hinge mechanisms in the lower connecting plate 2. Rubber pads are set between adjacent upper and lower hinge plates to achieve elastic connection.

[0031] The technical solution of this invention provides a hinge-type vibration isolation device with adjustable stiffness. As a load-bearing component of the vibration-isolated object, it can effectively isolate the propagation of external vibrations to the isolated object, achieving control over the vertical vibration response of the isolated object. The locking span of the locking rod 4 can be quickly adjusted by adjusting the position of the positioning nut 13 on the locking rod 4, thereby adjusting the triangular angle of the hinge mechanism, i.e., the slope of the hinge plate, and consequently, adjusting the tilt angle of the rubber pad on the hinge plate. The overall vertical stiffness of the support is determined by the vector synthesis of the normal tensile / compressive stiffness and the tangential shear stiffness of the rubber pad. Since the tangential shear stiffness of the rubber pad is much smaller than its normal tensile / compressive stiffness, adjusting the tilt angle of the rubber pad determines the rapid adjustment of the overall vertical stiffness of the support, thus realizing an adjustable stiffness vibration isolation device. This function allows for rapid and flexible adjustment of the vertical stiffness according to different vibration-isolated objects and vibration source frequencies, achieving optimal vibration isolation effect against environmental vibrations and improving the adaptability of the vibration isolation support product to different working conditions. In practical use, different numbers of hinge mechanisms can be used to assemble vibration isolation devices of various sizes according to design requirements. Moreover, due to its adjustable stiffness, its applicability is greatly improved compared to traditional supports, which greatly enhances the standardization level and design flexibility of vibration isolation devices.

[0032] This vibration isolation device can also be used as a tool for testing the mechanical properties of rubber pads. It can be used to conveniently test the mechanical properties of rubber pads under the combined action of normal tension and compression and tangential shear at different tilt angles, thus enabling the testing of the mechanical properties of rubber pads under complex working conditions.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hinge-type vibration isolation device with adjustable stiffness, characterized in that, The device includes an upper connecting plate and a lower connecting plate. The top end of the lower connecting plate and the bottom end of the upper connecting plate are provided with several slidable and adjustable hinge mechanisms along the length direction. The hinge mechanisms at the bottom end of the upper connecting plate and the hinge mechanisms at the top end of the lower connecting plate are arranged alternately in sequence. An elastic component is installed between every two adjacent hinge mechanisms. The upper connecting plate and the lower connecting plate are each provided with a locking rod for locking the corresponding hinge mechanism along the length direction. The hinge mechanism includes a first hinge plate and a second hinge plate that are hinged to each other. An adjustable support rod is connected between the first hinge plate and the second hinge plate. The two ends of the support rod are respectively hinged to the first hinge plate and the second hinge plate. A groove is provided at the bottom end of the upper connecting plate and the top end of the lower connecting plate. Two parallel locking rods are installed in the grooves. The locking rods pass through the non-hinged ends of the first hinge plate and the second hinge plate. Positioning nuts are installed on the locking rods corresponding to both sides of the first hinge plate and both sides of the second hinge plate.

2. The hinge-type vibration isolation device with adjustable stiffness according to claim 1, characterized in that, Both the first hinge plate and the second hinge plate have a square wave-shaped pin mother plate at their hinge ends. The pin mother plate on the first hinge plate and the pin mother plate on the second hinge plate are staggered. Both the first hinge plate and the second hinge plate have pin through holes, and a first pin is inserted into the pin through hole.

3. The hinge-type vibration isolation device with adjustable stiffness according to claim 1, characterized in that, Both the first hinge plate and the second hinge plate have a second pin that is rotatably mounted on their non-hinged ends, perpendicular to the locking rod. The locking rod passes through the second pin. The groove has elongated holes on both sides parallel to the locking rod. The two ends of the second pin are slidably mounted in the elongated holes.

4. The hinge-type vibration isolation device with adjustable stiffness according to claim 1, characterized in that, A third pin is installed through the middle of both the first hinge plate and the second hinge plate. Rectangular holes are symmetrically opened on the first hinge plate and the second hinge plate along the axis of the third pin. The two ends of the support rod are respectively connected to the third pin on the first hinge plate and the second hinge plate at the rectangular holes.

5. The hinge-type vibration isolation device with adjustable stiffness according to claim 1, characterized in that, The support rod includes a threaded sleeve and threaded adjusting rods installed at both ends of the threaded sleeve. The outer ends of the two threaded adjusting rods are respectively hinged to the first hinge plate and the second hinge plate.

6. The hinge-type vibration isolation device with adjustable stiffness according to claim 1, characterized in that, The elastic component includes two sealing plates and a rubber pad vulcanized between the two sealing plates, the sealing plates being bolted to the first hinge plate and the second hinge plate.

7. The hinge-type vibration isolation device with adjustable stiffness according to claim 6, characterized in that, A steel plate is embedded in the rubber pad.

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