Vibration damping device and control method therefor

Abstract

The present application provides a vibration damping device and a control method therefor. The vibration damping device comprises an air spring and a coil spring; the air spring comprises a housing, an upper cover, a rubber diaphragm, and a bottom plate; the housing is provided with an air cavity, and the air cavity is used for introducing air; the upper cover and the bottom plate are arranged at two ends of the air cavity in a top-to-bottom direction, and the rubber diaphragm is arranged between the upper cover and the housing so as to seal the air cavity; and the coil spring is fixed in the air cavity. In the vibration damping device provided by embodiments of the present application, the air spring and the coil spring are arranged in parallel, so that the load-bearing capacity and overall stiffness of the vibration damping device are improved, the vibration damping requirements for joint vibration damping in the vertical and horizontal directions can also be met, the vibration damping performance is good, and the service life of the air spring can be prolonged. The rubber diaphragm seals the air cavity, thereby increasing the overall air tightness of the vibration damping device. The air spring requires little or no air replenishment, the structure of the vibration damping device can be simpler, and the application range is wide.

Description

A vibration damping device and its control method Technical Field

[0001] This application relates to the field of vibration reduction technology, and in particular to a vibration reduction device and its control method. Background Technology

[0002] In related technologies, air springs often achieve vibration reduction by inflating the airbag. On the one hand, due to the influence of the effective vibration reduction area and the volume of the chamber, the load-bearing capacity and stiffness of air springs are relatively small, and the vibration reduction effect of air springs is singular. On the other hand, the chamber has poor sealing performance, and air springs need to be connected to the air circuit system for a long time to intake air, resulting in low ease of operation.

[0003] Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a vibration damping device and its control method, which adopts the form of air spring and helical spring in parallel to compensate for the dynamic stiffness of air spring, increase load-bearing capacity and vibration damping effect, and by setting rubber diaphragm, the air cavity has good sealing performance. The structure of the vibration damping device is simple and does not require constant connection to the air source.

[0005] This application provides a vibration damping device, including:

[0006] An air spring includes a housing, a top cover, a rubber diaphragm, and a base plate. The housing has an air cavity for introducing gas. The top cover and the base plate are located at both ends of the air cavity along the top-to-bottom direction. The rubber diaphragm is located between the top cover and the housing to seal the air cavity.

[0007] A helical spring is fixed inside the air cavity.

[0008] In some embodiments, the vibration damping device includes a sealing layer that at least covers the bottom end face of the rubber diaphragm.

[0009] In some embodiments, the sealing layer can press against the bottom surface of the rubber membrane under the pressure of the gas in the air cavity, or the sealing layer is bonded to the bottom surface of the rubber membrane;

[0010] And / or, the sealing layer can be pressed against the top surface of the rubber membrane by vacuum adsorption, or the sealing membrane is bonded to the top surface of the rubber membrane.

[0011] In some embodiments, along an axis close to the air cavity, the rubber membrane includes an interconnected edge region and a middle region, the edge region being for contacting the top surface of the housing, and the middle region protruding from the side of the edge region toward the side away from the air cavity to form an annular groove, the annular groove having a U-shaped cross-sectional area and the opening of the annular groove facing the air cavity.

[0012] In some embodiments, the top cover includes a first cover and a second cover. The bottom surface of the first cover is abutted against the edge region, the second cover is disposed in the middle region, and the annular groove is disposed between the first cover and the second cover. When the air chamber is full of air, the outer wall of the annular groove abuts against the first cover and the second cover respectively. When the air chamber is deficient in air, the outer wall of the annular groove is spaced apart from the first cover and the second cover respectively.

[0013] In some embodiments, the rubber membrane is formed as a single-piece structure, and the rubber membrane is a preform.

[0014] In some embodiments, along the top-bottom direction and in the direction away from the air cavity, the rubber membrane includes a first rubber layer, a fabric layer and a second rubber layer, with the fabric layer sandwiched between the first rubber layer and the second rubber layer, and the thickness of the first rubber layer being greater than the thickness of the second rubber layer.

[0015] In some implementations, the ratio of the thickness of the first rubber layer to the thickness of the second rubber layer is 1.5 to 3.

[0016] In some embodiments, the top cover further includes a fixing block, one end of which is disposed on the bottom side of the rubber membrane, and the other end of which passes through the rubber membrane and the second cover; the vibration damping device includes a mounting block;

[0017] The mounting block is connected to the top side of the helical spring, and the vibration damping device includes a first connector, which passes through the fixing block and the mounting block.

[0018] And / or, the mounting block is connected to the bottom side of the helical spring, and the vibration damping device includes a second connector that passes through the base plate and the mounting block.

[0019] In some embodiments, the mounting block has a slot in which the helical spring is engaged;

[0020] The helical spring is welded or bonded to the slot; or, the surface of the helical spring that contacts the slot is formed as a conical surface.

[0021] In some implementations, the helical spring and the mounting block are integrated into a single structure, with the helical spring sleeved on the outside of the mounting block.

[0022] In some implementations, the vibration damping device includes a first sealing ring sandwiched between the fixing block and the mounting block.

[0023] In some embodiments, the vibration damping device includes a mounting block and an adjustment assembly. One end of the mounting block is connected to the bottom side of the helical spring, and the other end is connected to the base plate. A mounting cavity is formed on the bottom side of the mounting block. At least a portion of the adjustment assembly passes through the mounting cavity and is movable in the top-bottom direction to adjust the size of the helical spring in the top-bottom direction.

[0024] In some embodiments, the adjusting assembly includes a connecting block and an adjusting nut, the connecting block being disposed within the mounting cavity, the adjusting nut being connected to the connecting block, and a portion of the top surface of the connecting block being spaced apart from the top surface of the mounting cavity along the top-to-bottom direction.

[0025] In some embodiments, the base plate has a receiving groove that communicates with the mounting cavity, the adjusting nut passes through the receiving groove and is connected to the connecting block, the vibration damping device includes a bottom cover disposed on the bottom side of the adjusting nut and the bottom cover enclosing the adjusting nut, and the vibration damping device includes a third connector that passes through the bottom cover and the base plate to connect the bottom cover and the base plate.

[0026] In some embodiments, the vibration damping device includes a second sealing ring disposed between the bottom cover and the bottom plate.

[0027] In some embodiments, the base plate has a receiving groove that communicates with the mounting cavity, the adjusting nut passes through the receiving groove and is connected to the connecting block, the adjusting nut is exposed on the outer surface of the vibration damping device, and the vibration damping device includes a third sealing ring disposed between the adjusting nut and the side wall of the receiving groove.

[0028] In some embodiments, the vibration damping device further includes an air valve, and the air spring is provided with an air nozzle, the air valve being detachably connected to the air nozzle.

[0029] In some implementations, the air valve is provided with an air inlet and an air inlet channel. The air inlet is located on the outside of the air valve and is used to connect to an external air source. The air inlet channel is connected to the air inlet. The vibration damping device includes a switch element located on the outside of the air inlet channel and is used to open or close the air inlet channel.

[0030] In some embodiments, the switching element includes a switch nut and a stop, and the air valve has a through hole on the side away from the air inlet. The through hole communicates with the air intake channel. The switch nut and the stop are inserted through the through hole. The switch nut can drive the stop to move along the axial direction of the through hole toward or away from the air intake channel under the action of external force, so as to close or open the air intake channel.

[0031] The switching element includes a fourth sealing ring, which is sandwiched between the stop and the side wall of the air intake passage.

[0032] This application also provides a control method for a vibration damping device, applicable to any embodiment of the vibration damping device in this application, the control method comprising:

[0033] In the initial state, the air valve of the vibration damping device is controlled to vent air into the air chamber, wherein the initial state is the state in which the air chamber is not vented;

[0034] Once the air chamber is confirmed to be full, the air valve of the vibration damping device is closed.

[0035] In some implementations, the closing of the air valve controlling the vibration damping device includes:

[0036] The air valve controlling the vibration damping device is separated from the air spring.

[0037] In some embodiments, the vibration damping device includes a switch element, which includes a switch nut and a stop element, and the control of closing the air valve of the vibration damping device includes:

[0038] The control switch nut drives the stop to move toward the air inlet channel of the air valve until the air inlet channel is closed.

[0039] In some implementations, the control method further includes:

[0040] The adjusting component of the vibration damping device drives the helical spring to move along the height direction.

[0041] The vibration damping device provided in this application embodiment uses an air spring and a helical spring connected in parallel to enhance the load-bearing capacity and overall stiffness of the device, making it easier to meet higher vibration damping requirements. It can also meet the requirements for simultaneous vertical and horizontal vibration damping, offering good vibration damping performance and extending the service life of the air spring. A rubber diaphragm seals the air chamber, increasing the overall airtightness of the device. The air spring requires almost no gas replenishment, resulting in a simpler structure and wider application range for the vibration damping device. Attached Figure Description

[0042] Figure 1 is a partial structural schematic diagram of the vibration damping device according to the first embodiment of this application, with the sealing layer omitted in the figure;

[0043] Figure 2 is another schematic diagram of the structure shown in Figure 1;

[0044] Figure 3 is a partial structural schematic diagram of a vibration damping device according to another embodiment of this application;

[0045] Figure 4 is a schematic diagram of the structure of the air valve and the switching component;

[0046] Figure 5 is a cross-sectional schematic diagram of the structure shown in Figure 4;

[0047] Figure 6 is a schematic diagram of another mating structure between the helical spring and the mounting block;

[0048] Figure 7 is a schematic diagram of the fit between the rubber membrane and the sealing layer;

[0049] Figure 8 is a schematic diagram of a control method for a vibration damping device according to an embodiment of this application. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0051] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0052] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0053] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0054] This application provides a vibration damping device.

[0055] It should be noted that the vibration reduction device provided in this application embodiment can be applied to fields such as aviation, shipbuilding, precision instruments, vehicles, and robots.

[0056] Please refer to Figures 1 to 7. The vibration damping device includes an air spring 10 and a coil spring 11.

[0057] The air spring 10 includes a housing 101, a top cover 102, a rubber diaphragm 12, and a base plate 103. The housing 101 is provided with an air chamber 101a for introducing gas. The top cover 102 and the base plate 103 are located at both ends of the air chamber 101a along the top-bottom direction. The rubber diaphragm 12 is located between the top cover 102 and the housing 101 to seal the air chamber 101a.

[0058] The helical spring 11 is fixed inside the air chamber 101a.

[0059] It is understandable that the air spring 10 is also called an airbag, airbag cylinder, or bladder cylinder. The air chamber 101a is used to introduce gas, so that the air spring 10 can use the pressure of the gas to achieve its elastic effect. When the air spring 10 is working, the distance between the upper cover 102 and the base plate 103 will change, thereby changing the size of the air chamber 101a. The gas in the air chamber 101a can absorb vibration and impact, thereby achieving vibration reduction.

[0060] Taking the application of air spring 10 in a vehicle as an example, when the road surface is uneven and the vehicle vibrates, the air spring 10 can absorb the vibration impact from the vehicle, thereby reducing the vibration of the vehicle body and improving the comfort of the vehicle.

[0061] It is understandable that air springs are difficult to meet the vibration reduction requirements in both the vertical and horizontal directions at the same time. The vibration reduction effect of air springs is singular, and air springs are prone to damage and fatigue failure during long-term use.

[0062] In this embodiment, the helical spring 11 is disposed in the air cavity 101a, and the air spring 10 and the helical spring 11 are arranged in parallel. On the one hand, the air spring 10 and the helical spring 11 work together to improve the load-bearing capacity and stiffness of the vibration damping device, which can meet the vibration damping requirements in both vertical and horizontal directions at the same time. On the other hand, the helical spring 11 assists in bearing the force. When the air spring 10 is damaged, leaks air, or fails due to fatigue, the helical spring 11 can continue to bear the load, which can effectively improve the service life of the air spring 10 and increase the vibration damping reliability of the vibration damping device.

[0063] The helical spring 11 can be a metal spring; for example, the helical spring 11 can be a steel spring.

[0064] It is understandable that the coil spring 11 is fixed in the air cavity 101a, meaning that when the vibration damping device is in the assembled state, the coil spring 11 will not move in the air cavity 101a, so as to increase the installation stability of the coil spring 11 and facilitate the coil spring 11 and the air spring 10 to absorb external impacts together, and the installation position of the air spring 10 will not change.

[0065] A rubber membrane 12 is disposed between the upper cover 102 and the housing 101. The rubber membrane 12 can serve as an isolation layer to isolate the air chamber 101a from the external structure. Furthermore, the rubber membrane 12 can deform, which helps to maintain the airtightness of the air chamber 101a and reduce the probability of air leakage.

[0066] The vibration damping device provided in this embodiment features an air spring 10 and a helical spring 11 connected in parallel, which enhances the load-bearing capacity and overall stiffness of the device. This facilitates meeting higher vibration damping requirements and also satisfies the need for simultaneous vertical and horizontal vibration damping. It exhibits excellent vibration damping performance and extends the service life of the air spring 10. A rubber diaphragm 12 seals the air chamber 101a, increasing the overall airtightness of the vibration damping device. The air spring 10 requires almost no additional gas, resulting in a simpler structure and wider application range for the vibration damping device.

[0067] In some embodiments, the vibration damping device includes a sealing layer 25.

[0068] The sealing layer 25 covers at least the bottom surface of the rubber membrane 12.

[0069] Here, the bottom surface of the rubber membrane 12 is the side of the rubber membrane 12 facing the air chamber 101a. The sealing layer 25 covers at least the bottom surface of the rubber membrane 12. It can be that the sealing layer 25 only covers the bottom surface of the rubber membrane 12, or it can cover both the bottom and top surfaces of the rubber membrane 12. There is no limitation here.

[0070] The sealing layer 25 primarily serves a sealing function. It is positioned at least between the rubber diaphragm 12 and the housing 101, further sealing the air chamber 101a. This reduces the likelihood of gas leakage from the connection between the rubber diaphragm 12 and the housing 101, increasing the airtightness of the air chamber 101a and maintaining stable air pressure. Consequently, the air spring 10 requires almost no additional gas, eliminating the need for a complex air path system. Furthermore, the sealing layer 25 also isolates the rubber diaphragm 12 from the gas in the air chamber 101a, protecting the rubber diaphragm 12, reducing its aging rate, and extending its service life.

[0071] The main structure of the sealing layer 25 is not limited, and the sealing layer 25 can be made of materials such as nylon.

[0072] In this embodiment, the sealing layer 25 further seals the air cavity 101a, increases the airtightness of the air cavity 101a, and also reduces the probability of aging caused by the rubber membrane 12 contacting the gas in the air cavity 101a, thereby increasing the service life of the rubber membrane and increasing the vibration damping reliability of the vibration damping device.

[0073] In some embodiments, see Figure 7, the sealing layer 25 covers the bottom and top surfaces of the rubber membrane 12.

[0074] In this embodiment, the sealing layer 25 covers both the bottom surface and the top surface of the rubber membrane 12. On the one hand, it can increase the sealing performance at the joint between the housing 101 and the rubber membrane 12, and also increase the sealing performance at the joint between the rubber membrane 12 and the top cover 102, further reducing the probability of gas leakage and ensuring high overall airtightness of the vibration damping device. On the other hand, the two sealing layers 25 can also protect the rubber membrane 12, further reducing the probability of the top and bottom sides of the rubber membrane 12 aging due to contact with gas, and improving the service life of the rubber membrane 12.

[0075] The connection method between the sealing layer 25 and the rubber membrane 12 is not limited.

[0076] In some embodiments, the sealing layer 25 can press against the bottom surface of the rubber membrane 12 under the pressure of the gas in the air chamber 101a, or the sealing layer 25 can be bonded to the bottom surface of the rubber membrane 12.

[0077] Understandably, under the pressure of the gas introduced into the air chamber 101a, the sealing layer 25 deforms towards the top and comes into contact with the bottom surface of the rubber diaphragm 12, thus achieving the connection between the sealing layer 25 and the rubber diaphragm 12. In this case, the sealing layer 25 can automatically adjust to maintain a good sealing effect under the pressure of the gas in the air chamber 101a, without the need for additional adhesive, making it easy to maintain and replace the sealing layer 25.

[0078] Of course, the sealing layer 25 can also be bonded to the bottom surface of the rubber membrane 12 by means of adhesive bonding. In this way, the sealing layer 25 is tightly bonded to the bottom surface of the rubber membrane 12, making it difficult to move or separate, and the seal is more stable and reliable.

[0079] In some embodiments, the sealing layer 25 can be pressed against the top surface of the rubber membrane 12 by vacuum adsorption, or the sealing layer 25 is bonded to the top surface of the rubber membrane 12.

[0080] Understandably, vacuum adsorption involves removing the air between the top surface of the rubber membrane 12 and the sealing layer 25, creating a negative pressure between them. Under this negative pressure, the sealing layer 25 adheres tightly to the rubber membrane 12. In this case, vacuum adsorption ensures good contact and sealing performance.

[0081] Of course, the sealing layer 25 can also be bonded to the top surface of the rubber membrane 12 by means of adhesive bonding. In this way, the sealing layer 25 is tightly bonded to the top surface of the rubber membrane 12, making it difficult to move or separate, and the seal is more stable and reliable.

[0082] In some embodiments, referring to Figures 2 and 3, along the direction of the axis near the air cavity 101a, the rubber membrane 12 includes an interconnected edge region 12a and a middle region 12b. The edge region 12a is used to mate with the top surface of the housing 101. The side of the middle region 12b near the edge region 12a protrudes toward the side away from the air cavity 101a to form an annular groove 12c. The cross-sectional area of ​​the annular groove 12c is U-shaped, and the opening of the annular groove 12c faces the air cavity 101a.

[0083] In this embodiment, the edge region 12a is used to mate with the top surface of the housing 101 so that the rubber membrane 12 can be tightly fixed between the top cover 102 and the housing 101. Here, the bottom surface of the edge region 12a can be formed as a flat surface to facilitate tight contact with the top cover 102 and the housing 101.

[0084] In this embodiment, when the rubber diaphragm 12 is subjected to pressure from the air chamber 101a, the U-shaped annular groove 12c can provide deformation space, which facilitates the rubber diaphragm 12 to adapt to the pressure changes of the air chamber 101a, adapt to different load conditions, and improve the service life of the rubber diaphragm 12.

[0085] In some embodiments, please refer to Figures 2 and 3. The upper cover 102 includes a first cover 1021 and a second cover 1022. The bottom end face of the first cover 1021 is abutted against the edge region 12a. The second cover 1022 is disposed in the middle region 12b. An annular groove 12c is disposed between the first cover 1021 and the second cover 1022. When the air chamber 101a is full of air, the outer wall of the annular groove 12c abuts against the first cover 1021 and the second cover 1022 respectively. When the air chamber 101a is deficient in air, the outer wall of the annular groove 12c is spaced apart from the first cover 1021 and the second cover 1022 respectively.

[0086] When the air chamber 101a is in a state of gas deficiency, it may mean that no gas has been introduced into the air chamber 101a or a small amount of gas has been introduced. At this time, the gas pressure is small and will not exert a large pressure on the rubber diaphragm 12. The outer wall of the annular groove 12c is spaced apart from the first cover 1021 and the second cover 1022, that is, there is a gap between the outer wall of the annular groove 12c and the first cover 1021 and the second cover 1022.

[0087] When the air chamber 101a is in a full state, that is, when the air chamber 101a is filled with gas, the gas pressure is relatively high and can act upward on the rubber membrane 12. The annular groove 12c deforms under the pressure, thereby achieving contact with the first cover 1021 and the second cover 1022.

[0088] In this embodiment, the first cover 1021 and the second cover 1022 are designed to facilitate docking with the rubber membrane 12, respectively. The annular groove 12c is positioned between the first cover 1021 and the second cover 1022, allowing the rubber membrane 12 a certain deformation space through the annular groove 12c. In a deflated state, the outer wall of the annular groove 12c is spaced apart from the first cover 1021 and the second cover 1022, thus providing a certain deformation space. This allows the rubber membrane 12 to deform moderately through the annular groove 12c in a fully inflated state. Consequently, the rubber membrane 12 can adapt to vibration changes through the deformation of the annular groove 12c. The contact between the rubber membrane 12 and the first cover 1021 and the second cover 1022 also restricts the deformation of the rubber membrane 12, reducing excessive deformation and extending its service life. The vibration damping device exhibits high reliability.

[0089] In some embodiments, the rubber membrane 12 is formed as an integral structure, and the rubber membrane 12 is a preform.

[0090] In other words, the rubber membrane 12 is manufactured as a single piece, which is convenient to form and requires fewer assembly steps. The rubber membrane 12 can be integrally formed by injection molding or other methods, and there are no restrictions here.

[0091] The rubber diaphragm 12 is a prefabricated part, meaning that the rubber diaphragm 12 has the ring groove 12c as soon as it is formed, and there is no need to process the ring groove 12c again during assembly.

[0092] Understandably, in some related technologies, the top and bottom surfaces of the one-piece molded rubber membrane are flat. When assembling it with the top cover and the shell, the annular groove needs to be machined again, which is inconvenient. Moreover, the reliability of the annular groove 12c is poor, and the force balance of each part of the annular groove is poor, which affects the vibration reduction reliability.

[0093] In this embodiment, the rubber membrane 12 is integrally formed and has an annular groove 12c, so there is no need to process the annular groove 12c separately. The annular groove 12c has good stress balance among its parts, which not only facilitates assembly but also improves the reliability of vibration reduction.

[0094] The specific structure of the rubber membrane 12 is not limited.

[0095] In some embodiments, referring to FIG7, along the top-bottom direction and in the direction away from the air cavity 101a, the rubber membrane 12 includes a first rubber layer 12d, a cord layer 12e, and a second rubber layer 12f, with the cord layer 12e sandwiched between the first rubber layer 12d and the second rubber layer 12f.

[0096] Understandably, the first rubber layer 12d is the layer of the rubber membrane 12 closest to the air cavity 101a, and the ply layer 12e is sandwiched between the first rubber layer 12d and the second rubber layer 12f. The ply layer 12e can be made of high-strength fibers such as nylon and polyester. The ply layer 12e can enhance the overall strength and tensile strength of the rubber membrane 12, maintain the geometry of the rubber membrane 12, and make the rubber membrane 12 less prone to rupture when subjected to greater pressure or deformation.

[0097] In this embodiment, the multilayer structure of the rubber membrane 12 can improve the strength and toughness of the rubber membrane 12 and extend its service life.

[0098] The thickness of the first rubber layer 12d is greater than the thickness of the second rubber layer 12f. In this way, the first rubber layer 12d can better withstand the pressure from the air cavity 101a and provide good elasticity and cushioning effect when subjected to external force.

[0099] In some embodiments, the ratio of the thickness of the first rubber layer 12d to the thickness of the second rubber layer 12f is 1.5 to 3, for example, 1.5, 1.6, 1.75, 1.8, 1.9, 2.0, 2.1, 2.2, 2.4, 2.5, 2.7, 2.9, 3.

[0100] In this embodiment, the thickness of the first rubber layer 12d is appropriately compared with the thickness of the second rubber layer 12f, which allows the first rubber layer 12d to withstand the pressure of the air chamber 101a well while ensuring that the overall thickness of the rubber membrane 12 is not too large, thereby increasing the compactness of the vibration damping device layout.

[0101] In some embodiments, please refer to Figures 2 and 3. The upper cover 102 also includes a fixing block 1023. One end of the fixing block 1023 is disposed on the bottom side of the rubber membrane 12, and the other end passes through the rubber membrane 12 and the second cover 1022. The vibration damping device includes a mounting block 13.

[0102] In other words, the rubber membrane 12 can be sandwiched between the fixing block 1023 and the second cover 1022 so that the rubber membrane 12 has good airtightness.

[0103] The mounting block 13 is connected to the top side of the coil spring 11. The vibration damping device includes a first connector 14, which passes through the fixing block 1023 and the mounting block 13.

[0104] And / or, the mounting block 13 is connected to the bottom side of the helical spring 11, and the vibration damping device includes a second connector 15, which passes through the base plate 103 and the mounting block 13.

[0105] It is understandable that the above includes a variety of situations.

[0106] The first method involves a single mounting block 13 connected to the top side of the coil spring 11. The bottom side of the coil spring 11 is fixed in another way or directly connected to the base plate 103 to fix the coil spring 11 within the air cavity 101a.

[0107] The second type: There is one mounting block 13. The mounting block 13 is connected to the bottom side of the coil spring 11. The top side of the coil spring 11 is fixed in another way or directly connected to the fixing block 1023 to fix the coil spring 11 in the air cavity 101a.

[0108] The third type: There are two mounting blocks 13. One mounting block 13 is connected to the top side of the coil spring 11, and the other mounting block 13 is connected to the bottom side of the coil spring 11. In this way, the top and bottom sides of the coil spring 11 are fixed in the air cavity 101a by the mounting blocks 13.

[0109] Taking the third scenario as an example, please refer to Figure 6. The first connector 14 connects the fixing block 1023 and the mounting block 13, thereby fixing the top surface of the coil spring 11 through the mounting block 13. The first connector 14 can be a fastener such as a screw, and the number of first connectors 14 can be one or more. The second connector 15 connects the base plate 103 and the mounting block 13, thereby fixing the bottom surface of the coil spring 11 through the mounting block 13. The second connector 15 can be a fastener such as a screw, and the number of second connectors 15 can be one or more.

[0110] It is understandable that the connection method between the helical spring 11 and the mounting block 13 is not limited, and the connection here includes abutment.

[0111] In some embodiments, please refer to FIG6, the mounting block 13 is formed with a slot 13a, and the helical spring 11 is engaged in the slot 13a.

[0112] The helical spring 11 is welded or bonded to the slot 13a.

[0113] In other words, in this embodiment, the coil spring 11 is first partially confined within the slot 13a by the slot 13a, and then the coil spring 11 is fixed within the slot 13a by welding or bonding, so as to reduce the possibility of displacement of the coil spring 11 and thereby increase the reliability of vibration reduction.

[0114] In other embodiments, the surface of the helical spring 11 that contacts the slot 13a is formed as a conical surface.

[0115] In this embodiment, by setting the conical surface, the inner diameter of the helical spring 11 can be deformed by pressure, thereby tightly fitting with the slot 13a. In this way, the helical spring 11 is fixed in the slot 13a, and then the helical spring 11 is fixed in the air cavity 101a.

[0116] In some embodiments, please refer to Figures 2 and 3, the helical spring 11 and the mounting block 13 are formed as an integral structure, and the helical spring 11 is sleeved on the outside of the mounting block 13.

[0117] In other words, the helical spring 11 and the mounting block 13 are manufactured as a single unit. The helical spring 11 and the mounting block 13 are formed as a whole, and the overall fixation of the helical spring 11 and the mounting block 13 can be achieved by connecting the mounting block 13 with the fixing block 1023 and the second cover 1022 and / or by connecting the mounting block 13 with the base plate 103.

[0118] In some embodiments, referring to Figures 2 and 3, the vibration damping device includes a first sealing ring 16, which is sandwiched between the fixing block 1023 and the mounting block 13.

[0119] In this embodiment, the first sealing ring 16 can reduce the probability of gas leakage from the joint between the fixed block 1023 and the mounting block 13 by deforming the first sealing ring 16 when connecting the fixed block 1023 and the mounting block 13, thereby increasing the airtightness of the vibration damping device.

[0120] In some embodiments, please refer to Figures 2 and 3. The vibration damping device includes a bracket 17 and an adjustment assembly 18. One end of the bracket 17 is connected to the bottom side of the helical spring 11, and the other end is connected to the base plate 103. A mounting cavity 17a is formed on the bottom side of the bracket 17. At least a portion of the adjustment assembly 18 passes through the mounting cavity 17a and is able to move along the top-bottom direction to adjust the size of the helical spring 11 along the top-bottom direction.

[0121] In other words, with the height of the air spring 10 remaining constant, the movement of the adjusting component 18 can adjust the dimension of the helical spring 11 along the top-to-bottom direction, thereby compensating for the air pressure in the air chamber 101a and keeping the overall load-bearing capacity of the vibration damping device within a stable range. Similarly, by adjusting the dimension of the helical spring 11 along the top-to-bottom direction, the load that the vibration damping device can withstand can also be compensated, thereby ensuring that the overall load-bearing capacity of the vibration damping device is stable and reliable.

[0122] In this embodiment, the height of the helical spring 11 can be adjusted by adjusting component 18, thereby compensating for the gas pressure change in the air chamber 101a and the load on the vibration damping device by the pressure change of the helical spring 11, so that the helical spring 11 and the air spring 10 connected in parallel have a stable and reliable vibration damping effect, and the vibration damping device has high vibration damping reliability.

[0123] The specific construction of the adjustment component 18 is not limited.

[0124] In some embodiments, please refer to Figures 2 and 3. The adjustment assembly 18 includes a connecting block 182 and an adjusting nut 181. The connecting block 182 is disposed in the mounting cavity 17a. The adjusting nut 181 is connected to the connecting block 182. A portion of the top surface of the connecting block 182 is spaced apart from the top surface of the mounting cavity 17a along the top-bottom direction.

[0125] In other words, by adjusting the screwing depth of the adjusting nut 181, the connecting block 182 is driven to move along the top and bottom direction, which in turn drives the helical spring 11 to move along the top and bottom direction. When the adjusting nut 181 is screwed to the top, the pressure is transmitted to the bracket 17 through the connecting block 182, and then to the helical spring 11. The helical spring 11 is compressed and its height decreases. When the adjusting nut 181 is screwed to the bottom, the helical spring 11 can recover its deformation to the bottom and its height increases.

[0126] In this embodiment, the height of the helical spring 11 is adjusted by adjusting the nut 181 and the connecting block 182. The connecting block 182 reduces contact wear caused by direct contact between the adjusting nut 181 and the bracket 17. Furthermore, the top surface of the connecting block 182 is spaced apart from the top surface of the mounting cavity 17a along the top-bottom direction. That is, the top surface of the connecting block 182 and the top surface of the mounting cavity 17a are not in full contact. Part of the top surface is in contact, while the other part is in clearance fit. This reduces the probability of the connecting block 182 driving the bracket 17 to rotate, so that the connecting block 182 can only drive the bracket 17 to move along the top-bottom direction, increasing the reliability of height adjustment.

[0127] In some embodiments, referring to FIG2, the base plate 103 has a receiving groove 103a, which communicates with the mounting cavity 17a. The adjusting nut 181 passes through the receiving groove 103a and is connected to the connecting block 182. The vibration damping device includes a bottom cover 19, which is disposed on the bottom side of the adjusting nut 181 and closes the adjusting nut 181. The vibration damping device includes a third connector 20, which passes through the bottom cover 19 and the base plate 103 to connect the bottom cover 19 and the base plate 103.

[0128] In other words, in this embodiment, the adjusting nut 181 is sealed by the bottom cover 19. On the one hand, the adjusting nut 181 is not visible from the bottom of the vibration damping device, which makes it easier to protect the adjusting nut 181. On the other hand, the setting of the bottom cover 19 and the connection between the bottom cover 19 and the base plate 103 can increase the airtightness and reduce the probability of gas leakage from the adjusting nut 181 and the receiving groove 103a.

[0129] The third connector 20 can be a fastener such as a screw, and the number of third connectors 20 can be one or more, without limitation.

[0130] In some embodiments, referring to FIG2, the vibration damping device includes a second sealing ring 21, which is disposed between the bottom cover 19 and the bottom plate 103.

[0131] In this embodiment, when connecting the bottom cover 19 and the bottom plate 103, the deformation of the second sealing ring 21 can reduce the probability of gas leakage from the joint between the bottom plate 103 and the bottom cover 19 through the adjusting nut 181 and the receiving groove 103a, thereby increasing the airtightness of the vibration damping device.

[0132] In some embodiments, referring to FIG3, the base plate 103 has a receiving groove 103a, which communicates with the mounting cavity 17a. The adjusting nut 181 passes through the receiving groove 103a and is connected to the connecting block 182. The adjusting nut 181 is exposed on the outer surface of the vibration damping device. The vibration damping device includes a third sealing ring 22, which is disposed between the adjusting nut 181 and the side wall of the receiving groove 103a.

[0133] In other words, in this embodiment, the adjusting nut 181 is visible from the outer surface, making it convenient to directly adjust the adjusting nut 181 when the spring height needs to be adjusted, without needing to disconnect the bottom cover 19 and the bottom plate 103 before adjusting the adjusting nut 181, thus making adjustment more convenient. Furthermore, the third sealing ring 22, through deformation of the third sealing ring 22, reduces the probability of gas leakage from the adjusting nut 181 and the receiving groove 103a when the adjusting nut 181 is operated.

[0134] In some embodiments, referring to Figures 4 and 5, the vibration damping device also includes an air valve 23, and the air spring 10 is provided with an air nozzle, with the air valve 23 detachably connected to the air nozzle.

[0135] Specifically, the air valve 23 is used to supply air to the air spring 10. The air valve 23, connected to the air nozzle, provides compressed gas into the air chamber 101a. In this embodiment, the air valve 23 and the air nozzle are detachably connected. When it is not necessary to supply air to the air spring 10, the connection between the air valve 23 and the air nozzle can be disconnected, allowing the air spring 10 and the coil spring 11 to operate as an independent structure. This simplifies the structure and avoids interference from the operation of the air valve 23 on the vibration damping device.

[0136] It is understandable that, taking the vibration damping device as an example of an ultra-precision vibration damping device, the operation of the air valve will generate electromagnetic, noise, and vibration interference to the vibration damping device.

[0137] Therefore, in this embodiment, while reducing the interference of the air valve 23 on the air spring 10 and the helical spring 11, the working time of the air valve 23 can also be reduced, thus improving the lifespan of the air valve 23.

[0138] Understandably, the air nozzle can be located on the periphery of the housing 101.

[0139] Of course, in other embodiments, the vibration damping device already possesses sufficient airtightness due to the sealing layer 25 and / or the adjustment component 18, or pressure compensation can be achieved by adjusting the helical spring 11, thus eliminating the need for the air valve 23. The overall structure of the vibration damping device can be simpler.

[0140] In some embodiments, please refer to Figure 5. The air valve 23 is provided with an air inlet 23a and an air inlet channel 23b. The air inlet 23a is located on the outside of the air valve 23 and is used to connect to an external air source. The air inlet channel 23b is connected to the air inlet 23a. The vibration damping device includes a switch 24, which is located on the outside of the air inlet channel 23b and is used to open or close the air inlet channel 23b.

[0141] Specifically, gas can flow from an external gas source through the air inlet 23a and the air inlet channel 23b to the air nozzle, and then into the air chamber 101a. In this embodiment, the switch 24 allows the air chamber 101a to remain closed when inflation is not required. Simultaneously, when the air valve 23 needs to be tested, the switch 24 can close the air inlet channel 23b to isolate it from the air chamber 101a. Furthermore, by opening and closing the air inlet channel 23b, the switch 24 keeps the air inlet 23a normally open, facilitating direct air intake when needed. This also reduces the occurrence of protruding parts on the outside of the air valve 23 when closing the air inlet 23a.

[0142] The specific structure of the switch 24 is not limited.

[0143] In some embodiments, please refer to Figure 5. The switch 24 includes a switch nut 241 and a stop 243. The air valve 23 has a through hole 23c on the side away from the air inlet 23a. The through hole 23c communicates with the air intake channel 23b. The switch nut 241 and the stop 243 pass through the through hole 23c. The switch nut 241 can drive the stop 243 to move along the axial direction of the through hole 23c toward or away from the air intake channel 23b under the action of external force, so as to close or open the air intake channel 23b.

[0144] The switch component 24 includes a fourth sealing ring 242, which is sandwiched between the switch nut 241 and the side wall of the air intake passage 23b.

[0145] In this embodiment, the opening and closing of the air intake passage 23b is achieved by the switch nut 241 and the stop 243, which is simple and convenient to operate, eliminating the need for a complex switch valve, resulting in a simple structure and low cost. Furthermore, by utilizing the space within the air valve 23 to house the switch nut 241 and the stop 243, the structure becomes more compact.

[0146] The fourth sealing ring 242 is provided so that when the switch nut 241 is operated, the deformation of the fourth sealing ring 242 can complete the closure of the air intake passage 23b by the stop 243, reducing the probability of gas leakage from the joint between the switch nut 241 and the air intake passage 23b.

[0147] This application also provides a control method for a vibration damping device, applicable to vibration damping devices in any embodiment of this application.

[0148] Please refer to Figure 8. The control methods include:

[0149] S101: In the initial state, the air valve 23 of the control vibration damping device is used to supply air to the air chamber 101a. The initial state is the state in which the air chamber 101a is not supplied with air.

[0150] S102: Confirm that the air chamber 101a is full of air, and close the air valve 23 of the vibration damping device.

[0151] Here, the initial state can be the state after the air spring 10 and the coil spring 11 are assembled. At this time, the air chamber 101a is not ventilated. By connecting the air valve 23 to the air nozzle of the air spring 10, the air valve 23 delivers gas into the air chamber 101a, thus ventilating the air chamber 101a. When the air chamber 101a is full of air, the air valve 23 is closed.

[0152] In some embodiments, closing the air valve 23 of the vibration damping device includes:

[0153] The air valve 23 of the vibration damping device is separated from the air spring 10.

[0154] Here, "separation" refers to disconnecting the air valve 23 from the air spring 10, meaning that the air spring 10 and the coil spring 11 can operate independently of the air valve 23 as a whole. In other words, once the air chamber 101a is full of air, there is no need to connect the air valve 23 anymore. With a single air supply, the air spring 10 and the coil spring 11 can independently perform vibration damping. This simplifies the structure, makes it easier to adapt to different operating environments, and eliminates the need for an additional air valve 23 during use.

[0155] In some embodiments, the vibration damping device includes a switch 24, which includes a switch nut 241 and a stop 243. Controlling the closure of the air valve 23 of the vibration damping device includes:

[0156] The movement of the control switch nut 241 causes the stop 243 to move toward the air intake passage 23b of the air valve 23 until the air intake passage 23b is closed.

[0157] Here, after the air chamber 101a is full of air, the connection between the air valve 23 and the air spring 11 is not disconnected. Instead, the air intake passage 23b is closed by the switch 24. Specifically, the stop 243 is moved by turning the switch nut 241 to close the air intake passage 23b. This cuts off the air path between the air valve 23 and the air nozzle. If air replenishment is needed after the air spring 10 has been used for a long time, the switch nut 241 can be turned again to open the air intake passage 23b, thereby connecting the air path between the air valve 23 and the air nozzle. This allows for intermittent air supply to the air valve 23.

[0158] In some embodiments, the control method further includes:

[0159] The adjusting component 18 of the vibration damping device drives the helical spring 11 to move along the height direction.

[0160] Here, the adjusting component 18 drives the helical spring 11 to move along the height direction to compensate for the air pressure in the air chamber 101a. Simultaneously, it also compensates for the load that the vibration damping device can withstand, thereby ensuring the overall load-bearing capacity of the vibration damping device is stable and reliable. When using the adjusting component 18, the air valve 23 of the vibration damping device can either supply air once, filling the air chamber 101a with air in the initial state and then separating from the air spring 10, or it can supply air intermittently, with the air passage between the air valve 23 and the air nozzle intermittently opened by the switching component 24.

[0161] The structure of the adjustment component 18 can be referred to in the above embodiment, and will not be described in detail here.

[0162] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0163] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A vibration damping device, wherein, include: An air spring includes a housing, a top cover, a rubber diaphragm, and a base plate. The housing is provided with an air chamber for introducing gas. The upper cover and the bottom plate are disposed at both ends of the air cavity along the top-bottom direction, and the rubber membrane is disposed between the upper cover and the shell to seal the air cavity; A helical spring is fixed inside the air cavity.

2. The vibration damping device according to claim 1, wherein, The vibration damping device further includes a sealing layer, which covers at least the bottom surface of the rubber membrane.

3. The vibration damping device according to claim 2, wherein, The sealing layer can press against the bottom surface of the rubber membrane under the pressure of the gas in the air cavity, or the sealing layer can be bonded to the bottom surface of the rubber membrane. And / or, the sealing layer can be pressed against the top surface of the rubber membrane by vacuum adsorption, or the sealing membrane is bonded to the top surface of the rubber membrane.

4. The vibration damping device according to claim 1, wherein, Along the axis near the air cavity, the rubber membrane includes an interconnected edge region and a middle region. The edge region is used to mate with the top surface of the housing. The middle region protrudes from the side near the edge region toward the side away from the air cavity to form an annular groove. The cross-sectional area of ​​the annular groove is U-shaped, and the opening of the annular groove faces the air cavity.

5. The vibration damping device according to claim 4, wherein, The upper cover includes a first cover and a second cover. The bottom end face of the first cover is abutted against the edge region. The second cover is disposed in the middle region. The annular groove is disposed between the first cover and the second cover. When the air chamber is full of air, the outer wall of the annular groove abuts against the first cover and the second cover respectively. When the air chamber is deficient in air, the outer wall of the annular groove is spaced apart from the first cover and the second cover respectively.

6. The vibration damping device according to claim 4, wherein, The rubber membrane is formed as an integral structure and is a prefabricated component.

7. The vibration damping device according to claim 1, wherein, Along the top-bottom direction and away from the air cavity, the rubber membrane includes a first rubber layer, a fabric layer and a second rubber layer, with the fabric layer sandwiched between the first rubber layer and the second rubber layer, and the thickness of the first rubber layer being greater than the thickness of the second rubber layer.

8. The vibration damping device according to claim 7, wherein, The ratio of the thickness of the first rubber layer to the thickness of the second rubber layer is 1.5 to 3.

9. The vibration damping device according to claim 5, wherein, The upper cover also includes a fixing block, one end of which is disposed on the bottom side of the rubber membrane, and the other end of which passes through the rubber membrane and the second cover; the vibration damping device includes a mounting block; The mounting block is connected to the top side of the helical spring, and the vibration damping device includes a first connector, which passes through the fixing block and the mounting block. And / or, the mounting block is connected to the bottom side of the helical spring, and the vibration damping device includes a second connector that passes through the base plate and the mounting block.

10. The vibration damping device according to claim 9, wherein, The mounting block has a slot, and the helical spring is engaged in the slot; The helical spring is welded or bonded to the slot; or, the surface of the helical spring that contacts the slot is formed as a conical surface.

11. The vibration damping device according to claim 9, wherein, The helical spring and the mounting block form an integral structure, with the helical spring sleeved on the outside of the mounting block.

12. The vibration damping device according to claim 9, wherein, The vibration damping device includes a first sealing ring, which is sandwiched between the fixed block and the mounting block.

13. The vibration damping device according to claim 1, wherein, The vibration damping device includes a bracket and an adjustment assembly. One end of the bracket is connected to the bottom side of the helical spring, and the other end is connected to the base plate. A mounting cavity is formed on the bottom side of the bracket. At least a portion of the adjustment assembly passes through the mounting cavity and is capable of moving along the top-bottom direction to adjust the size of the helical spring along the top-bottom direction.

14. The vibration damping device according to claim 13, wherein, The adjustment assembly includes a connecting block and an adjusting nut. The connecting block is disposed in the mounting cavity, and the adjusting nut is connected to the connecting block. A portion of the top surface of the connecting block is spaced apart from the top surface of the mounting cavity along the top-bottom direction.

15. The vibration damping device according to claim 14, wherein, The base plate has a receiving groove that communicates with the mounting cavity. The adjusting nut passes through the receiving groove and is connected to the connecting block. The vibration damping device includes a bottom cover that is disposed on the bottom side of the adjusting nut and closes the adjusting nut. The vibration damping device includes a third connecting member that passes through the bottom cover and the base plate to connect the bottom cover and the base plate.

16. The vibration damping device according to claim 15, wherein, The vibration damping device includes a second sealing ring, which is disposed between the bottom cover and the bottom plate.

17. The vibration damping device according to claim 14, wherein, The base plate has a receiving groove that communicates with the mounting cavity. The adjusting nut passes through the receiving groove and is connected to the connecting block. The adjusting nut is exposed on the outer surface of the vibration damping device. The vibration damping device includes a third sealing ring that is disposed between the adjusting nut and the side wall of the receiving groove.

18. The vibration damping device according to claim 1, wherein, The vibration damping device also includes an air valve, and the air spring is provided with an air nozzle. The air valve is detachably connected to the air nozzle.

19. The vibration damping device according to claim 18, wherein, The air valve is provided with an air inlet and an air inlet channel. The air inlet is located on the outside of the air valve and is used to connect to an external air source. The air inlet channel is connected to the air inlet. The vibration damping device includes a switch element located on the outside of the air inlet channel and is used to open or close the air inlet channel.

20. The vibration damping device according to claim 19, wherein, The switching component includes a switch nut and a stop. The air valve has a through hole on the side away from the air inlet. The through hole communicates with the air intake channel. The switch nut and the stop are inserted through the through hole. The switch nut can drive the stop to move along the axial direction of the through hole towards or away from the air intake channel under the action of external force, so as to close or open the air intake channel. The switching element includes a fourth sealing ring, which is sandwiched between the stop and the side wall of the air intake passage.

21. A control method for a vibration damping device, applied to the vibration damping device according to any one of claims 1-20, wherein, The control method includes: In the initial state, the air valve of the vibration damping device is controlled to vent air into the air chamber, wherein the initial state is the state in which the air chamber is not vented; Once the air chamber is confirmed to be full, the air valve of the vibration damping device is closed.

22. The control method for the vibration damping device according to claim 21, wherein, The control of closing the air valve of the vibration damping device includes: The air valve controlling the vibration damping device is separated from the air spring.

23. The control method for the vibration damping device according to claim 21, wherein, The vibration damping device includes a switching component, which includes a switching nut and a stop component. The method of controlling the air valve of the vibration damping device to close includes: The control of the switch nut movement causes the stop to move toward the air inlet channel of the air valve until the air inlet channel is closed.

24. The control method for the vibration damping device according to any one of claims 21-23, wherein, The control method further includes: The adjusting component of the vibration damping device drives the helical spring to move along the height direction.

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