Separating type multi-stage friction damping support

Abstract

The utility model provides a separated multi-stage friction damping support, and belongs to the technical field of bridge supports. The support comprises an upper support, a middle cover plate, a spherical crown lining plate and a lower support which are sequentially overlapped, the upper support is in sliding fit with the middle cover plate, the middle cover plate is in sliding fit with the spherical crown lining plate, and the spherical crown lining plate is in running fit with the lower support; an injection channel is formed in the spherical crown lining plate and used for injecting lubricating liquid, and an injection outlet of the injection channel is located in the side, facing the middle cover plate, of the spherical crown lining plate. The injection port of the injection channel is formed in the side, facing the middle cover plate, of the spherical crown lining plate, so that lubricating liquid can lubricate the oppositely-arranged surfaces of the spherical crown lining plate and the middle cover plate, friction between the spherical crown lining plate and the middle cover plate is reduced, the support can adapt to normal displacement of a beam body, and the service life of the support is prolonged. And in addition, under the condition that an earthquake comes, the middle cover plate and the spherical crown lining plate can normally slide and are matched with the upper support to swing, and the earthquake force is dissipated.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge bearings, and in particular relates to a separated multi-stage friction damping bearing. Background Art

[0002] Friction pendulum bearings are currently widely used because of their large load-bearing capacity and flexible rotation. They are set between bridges and support columns to transfer loads, adapt to bridge displacement angles, and are used to reduce shock and energy consumption.

[0003] In the related art, the friction pendulum bearing includes an upper bearing, an intermediate cover plate, a spherical crown lining plate and a lower bearing which are arranged in an overlapping manner. The upper bearing and the intermediate cover plate are in sliding cooperation, and the intermediate cover plate and the spherical crown lining plate are in sliding cooperation, wherein the friction coefficient between the upper bearing and the intermediate cover plate is greater than the friction coefficient between the intermediate cover plate and the spherical crown lining plate. By setting different friction coefficients, the intermediate cover plate and the spherical crown lining plate can slide relative to each other before the upper bearing and the intermediate cover plate. The sliding between the intermediate cover plate and the spherical crown lining plate is mainly used to adapt to normal displacement, and the sliding between the upper bearing and the intermediate cover plate is mainly used to adapt to earthquake displacement.

[0004] However, during the long-term actual operation of the bridge, the friction coefficient between the middle cover plate and the spherical crown lining plate may be greater than the friction coefficient between the upper bearing and the middle cover plate, resulting in the bearing being unable to adapt to the normal displacement of the beam body. Especially in the event of an earthquake, the middle cover plate and the spherical crown lining plate cannot slide normally, and the swinging effect of the bearing is limited, which will affect the dissipation of seismic force by the bearing in the seismic displacement plane. Utility Model Content

[0005] The purpose of this application is to provide a separate multi-stage friction shock-absorbing bearing to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented as follows:

[0007] The present application provides a separate multi-stage friction shock-absorbing bearing, comprising an upper bearing, an intermediate cover plate, a spherical crown lining plate and a lower bearing which are arranged in sequence and overlap each other, the upper bearing and the intermediate cover plate are slidingly matched, the intermediate cover plate and the spherical crown lining plate are slidingly matched, and the spherical crown lining plate and the lower bearing are rotationally matched; an injection channel is arranged inside the spherical crown lining plate, the injection channel is used to inject lubricating liquid, and the injection outlet of the injection channel is located on the side of the spherical crown lining plate facing the intermediate cover plate.

[0008] The technical solution adopted in this application can achieve the following beneficial effects:

[0009] In the present application, an injection channel is provided in the spherical crown lining to provide a flow channel for the lubricating liquid, and the injection port of the injection channel is provided on the side of the spherical crown lining facing the middle cover plate, so that the lubricating liquid can lubricate the surfaces of the spherical crown lining and the middle cover plate that are arranged opposite to each other, thereby reducing the friction between the spherical crown lining and the middle cover plate, so that the bearing can adapt to the normal displacement of the beam body, and in the event of an earthquake, the middle cover plate and the spherical crown lining can slide normally and cooperate with the upper bearing to swing to dissipate the seismic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 is a schematic diagram of the overall structure of a support provided in some embodiments of the present application;

[0012] Figure 2 is a schematic diagram of a disassembled support provided in some embodiments of the present application;

[0013] Figure 3 is a schematic diagram of separation of a stopper and a support provided in some embodiments of the present application;

[0014] Figure 4 The vibration reduction process of the support provided in some embodiments of the present application is shown in FIG. Figure 1 ;

[0015] Figure 5 The vibration reduction process of the support provided in some embodiments of the present application is shown in FIG. Figure 2 ;

[0016] Figure 6 The vibration reduction process of the support provided in some embodiments of the present application is shown in FIG. Figure 3 ;

[0017] Figure 7 This is a schematic diagram of the structure of the ball cap liner provided in some embodiments of the present application. Figure 1 ;

[0018] Figure 8 This is a schematic diagram of the structure of the ball cap liner provided in some embodiments of the present application. Figure 2 ;

[0019] Fig. 9 It is a schematic diagram of the internal structure of the spherical cap liner provided in some embodiments of the present application;

[0020] Fig.10is a cross-sectional view of a spherical cap liner provided in some embodiments of the present application Figure 1 ;

[0021] Fig.11 is a cross-sectional view of a spherical cap liner provided in some embodiments of the present application Figure 2 ;

[0022] Fig.12 It is a schematic diagram of the structure of the first type of plug provided in some embodiments of the present application;

[0023] Fig.13 It is a schematic diagram of the structure of the second type of plug provided in some embodiments of the present application.

[0024] In the figure: 100-upper support, 110-second limiting structure, 200-middle cover plate, 210-first limiting structure, 300-spherical crown lining, 310-injection channel, 311-injection outlet, 320-mounting groove, 400-lower support, 500-flat slide plate, 600-sealing ring, 700-plug, 710-threaded connection part, 720-insertion part, 810-upper spherical slide plate, 820-lower spherical slide plate, 900-stopper. DETAILED DESCRIPTION

[0025] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0026] Most of the bearings in use are located outdoors. The outdoor environmental factors are changeable, and even with protective measures, the bearings will be worn out. Even in some friction pendulum bearings, the friction coefficient between the middle cover plate and the ball crown lining plate is greater than the friction coefficient between the upper bearing and the middle cover plate, affecting the normal operation of the bearing.

[0027] The inventors have found through research that the increase in the friction coefficient between the middle cover plate and the spherical crown lining plate is caused by the lack of lubrication between the two.

[0028] In view of this, the present application provides a separate multi-stage friction shock-absorbing bearing, which provides an injection channel 310 in the spherical cap lining 300 to inject lubricating liquid between the two to reduce the friction coefficient between the two.

[0029] The separated multi-stage friction damping bearing provided in the embodiment of the present application comprises an upper bearing 100, an intermediate cover plate 200, a spherical cap lining plate 300 and a lower bearing 400 which are sequentially overlapped. Figure 1 and Figure 2As shown. It can be understood that the upper support 100 is located at the top and connected to the bridge beam, and the lower support 400 is located at the bottom and connected to supporting structures such as piers and support columns. The upper support 100 and the middle cover plate 200 are in sliding cooperation, and the middle cover plate 200 and the spherical crown lining plate 300 are in sliding cooperation. The spherical crown lining plate 300 and the lower support 400 are in rotational cooperation. The sliding between the middle cover plate 200 and the spherical crown lining plate 300 can adapt to the normal displacement of the beam body, such as the displacement caused by temperature changes, the displacement caused by vibration during the passage of vehicles, etc. The upper support 100 and the middle cover plate 200 are in sliding cooperation, the middle cover plate 200 and the spherical crown lining plate 300 are in sliding cooperation, and the spherical crown lining plate 300 and the lower support 400 are in rotational cooperation. The three movements work together to dissipate seismic forces.

[0030] An injection channel 310 is provided inside the spherical cap lining 300, and the injection channel 310 is used to inject lubricating liquid. The lubricating liquid is usually grease with lubricating effect, and can also be other liquids with lubricating effect. The grease mentioned in the following text can also be equivalently replaced by other lubricating liquids. The injection channel 310 has an injection inlet and an injection outlet 311. The lubricating liquid is injected into the injection inlet, and the lubricating liquid flows along the injection channel 310 to the injection outlet 311, lubricating the middle cover plate 200 and the spherical cap lining 300 at the injection outlet 311, thereby reducing the friction between the middle cover plate 200 and the spherical cap lining 300, so that the friction coefficient between the middle cover plate 200 and the spherical cap lining 300 can be smaller than the friction coefficient between the middle cover plate 200 and the upper support 100 plate.

[0031] When the friction coefficient between the middle cover plate 200 and the spherical cap lining plate 300 is small, the bridge can be adapted to its normal position, so that the bearing can operate normally. In the event of an earthquake, the bearing can be ensured to swing normally to dissipate the earthquake force.

[0032] In a specific implementation, under the action of earthquake force, the spherical cap lining plate 300 will first swing, and the spherical cap lining plate 300 will rotate in the lower support 400. Figure 4 As shown, part of the earthquake force is dissipated by rotation. As the earthquake force continues to increase, the middle cover plate 200 and the ball cap lining plate 300 with a smaller friction coefficient begin to slide. Figure 5 As shown. It can be understood that there is a limit structure between the spherical cap lining plate 300 and the middle cover plate 200 to stop the sliding movement of the two, so that the upper support 100 and the middle cover plate 200 with a larger friction coefficient can slide relative to each other. After the middle cover plate 200 and the spherical cap slide to the limit position, under the action of the earthquake force, the upper support 100 begins to slide on the middle cover plate 200 and continues to dissipate the friction force. Figure 6 When the earthquake force is turned, the rotation direction of the spherical cap lining plate 300, the sliding direction of the middle cover plate 200 and the sliding direction of the upper support 100 in the support change together.

[0033] In the fixed support, a stopper 900 is provided between the lower support 400 and the upper support 100, or between the lower support 400 and the middle cover plate 200. The stopper 900 is connected to one of the two and is limitedly matched with the other. The stopper 900 is used to prevent the middle cover plate 200 from moving a large distance relative to the lower support 400. Even if the stopper 900 is provided between the upper support 100 and the lower support 400, since the friction coefficient between the upper support 100 and the middle cover plate 200 is large, the upper support 100 usually moves synchronously with the middle cover plate 200, so the stopper 900 preventing the upper support 100 from moving is equivalent to preventing the middle cover plate 200 from moving.

[0034] In the daily operation of the beam body, the sliding distance between the middle cover plate 200 and the spherical cap lining plate 300 is short, and the stopper 900 does not play a limiting role. In the event of an earthquake, when the earthquake force is low, the stopper 900 plays a limiting role and prevents the middle cover plate 200 from moving. Therefore, the spherical cap lining plate 300 will rotate first until the earthquake force reaches the critical point, shearing off the stopper 900, so that the stopper 900 is detached from the support. Figure 3 As shown, the shearing of the stopper 900 can also consume part of the seismic force, avoid the seismic response excellence period, reduce the seismic response of the upper structure of the support, and thus achieve the purpose of shock absorption. After the stopper 900 is sheared off, the sliding distance between the middle cover plate 200 and the spherical cap lining plate 300 will increase until they slide to the limit position.

[0035] In some embodiments of the present application, the middle cover plate 200 is connected to a first limiting structure 210, which can stop and limit the middle cover plate 200 with the spherical cap lining plate 300 in the sliding direction of the middle cover plate 200, thereby limiting the sliding path of the middle cover plate 200 on the spherical cap lining plate 300. A plug 700 is installed at the injection inlet of the injection channel 310. The plug 700 blocks the injection inlet to prevent the grease in the injection channel 310 from overflowing, so that the injection channel 310 can always maintain a full state. When the grease is added next time, the grease can quickly overflow from the injection outlet 311 to lubricate the area that needs lubrication.

[0036] There are many ways to install the plug 700 and the injection channel 310. In some embodiments, the plug 700 has a threaded connection portion 710, referring to Fig.12 The threaded connection portion 710 of the plug 700 is threadedly connected to the injection channel 310, the connection is tight, and the disassembly and installation are relatively convenient. In other embodiments, the plug 700 has an insertion portion 720, Fig.13 The insertion portion 720 of the plug 700 is directly inserted into the injection channel 310 along its axial direction to seal the injection channel 310 .

[0037] The plug 700 can be arranged on the sliding path of the first limiting structure 210. When the middle cover plate 200 slides with the spherical cap lining plate 300, the first limiting structure 210 fixed to the middle cover plate 200 can directly abut against the plug 700, thereby preventing the middle cover plate 200 from sliding further. When the plug 700 has an insertion portion 720, the insertion portion 720 is not completely inserted into the injection channel 310. Part of the insertion portion 720 is located in the injection channel 310, and part of the insertion portion 720 is located outside the injection channel 310. Since the plug 700 is located on the sliding path of the first limiting structure 210, when the first limiting structure 210 and the plug 700 are in abutment with each other, under the action of the earthquake force, the first limiting structure 210 can press against the plug 700 so that the insertion portion 720 of the plug 700 continues to be inserted into the injection channel 310, and the length of the insertion portion 720 in the injection channel 310 increases until the first limiting structure 210 can no longer drive the insertion portion 720 to move. Fig.10 As shown, the middle cover plate 200 reaches the limit position and the upper support 100 starts to slide.

[0038] As the length of the insertion portion 720 in the injection channel 310 increases, the space for storing grease in the injection channel 310 decreases, and the excess grease overflows from the injection outlet 311 to between the spherical cap lining plate 300 and the middle cover plate 200, lubricating the surfaces of the two facing each other. It should be noted that in the daily operation of the bridge, the relative sliding distance between the middle cover plate 200 and the spherical cap lining plate 300 is short, and only part of the surface of the middle cover plate 200 can contact the grease on the surface of the spherical cap lining plate 300 to achieve a lubricating effect, so that the friction coefficient between the two can meet the operation requirements. When an earthquake occurs, the plug 700 can drive some grease in the injection channel 310 to overflow, accompanied by the sliding between the middle cover plate 200 and the spherical crown lining plate 300, to lubricate the surface of the middle cover plate 200 that can contact the spherical crown lining plate 300 during the sliding process, balance the friction coefficient between the middle cover plate 200 and the spherical crown lining plate 300, avoid the situation where the friction coefficient between part of the surface of the middle cover plate 200 and the spherical crown lining plate 300 is too large, and the friction coefficient between part of the surface of the middle cover plate 200 and the spherical crown lining plate 300 is too small, thereby ensuring the normal swing of the bearing and dissipating the seismic force.

[0039] An elastic reset structure may be provided between the plug 700 and the spherical cap lining 300. When the inserting portion 720 is pressed against the injection channel 310 and the first limiting structure 210 is separated from the plug 700, the elastic reset structure can drive the inserting portion 720 to reset. The position of the plug 700 may also be adjusted when injecting grease next time.

[0040] When the plug 700 is connected to the injection thread, the position of the injection channel 310 can be changed to avoid contact between the plug 700 and the first limiting structure 210, which would cause damage to the plug 700 and / or the first limiting structure 210.

[0041] The length of the insertion portion 720 of the plug 700 can be set according to actual requirements, and the ratio of the length of the insertion portion 720 located inside the injection channel 310 to the length outside the injection channel 310 can also be adjusted according to actual requirements.

[0042] In some preferred embodiments of the present application, an injection channel 310 has at least two injection outlets 311, and the two injection outlets 311 are arranged along the sliding direction of the middle cover plate 200, and the grease in the injection channel 310 can overflow through the two injection outlets 311. The injection inlet of the injection channel 310 needs to be arranged close to one of the injection outlets 311, so that along the extension direction of the injection channel 310, the length of the insertion portion 720 of the plug 700 installed in the injection inlet is greater than the distance between the injection inlet and the injection outlet 311 close to it, refer to Fig.11 In such a layout, when the first limiting structure 210 drives the insertion part 720 completely into the injection channel 310, the insertion part 720 is relatively long and can extend to the injection outlet 311 corresponding to the injection inlet where it is inserted, and block the injection outlet 311, so that the grease in the injection channel 310 can only overflow through another injection outlet 311.

[0043] When the first limiting structure 210 is pressed against the plug 700, the positions of the middle cover plate 200 and the spherical cap lining plate 300 can be referred to Figure 5 and Figure 6 As shown. The spherical crown lining 300 slides to the extreme position on the lower support 400, and the middle cover plate 200 and the upper support 100 on the spherical crown lining 300 are tilted synchronously with the spherical crown lining 300, and the first limiting structure 210 and the plug 700 that stop and cooperate with each other are located on the lower side of the spherical crown lining 300. At this time, the grease on the surface of the spherical crown lining 300 can flow under the action of gravity. It flows to the lower side of the spherical crown lining 300 to lubricate the middle cover plate 200 and the spherical crown lining 300 at this position. On the higher side of the spherical crown lining 300, there is less grease and the lubrication effect is poor. However, due to the adhesion of grease, its flow effect is not strong, and some grease still remains on the higher side of the spherical crown lining 300 to lubricate this place.

[0044] By limiting the length of the insertion part 720, the insertion part 720 can block the grease outlet adjacent to it, that is, when the first limiting structure 210 and the plug 700 are limited and matched, the insertion part 720 can block the grease outlet located at the lower side of the spherical crown, and the excess grease can only overflow from the other injection outlets 311 of the injection channel 310. Since the injection outlets 311 of the injection channel 310 are arranged along the sliding direction of the middle cover plate 200, the height position of the unblocked injection outlets 311 will be higher than the height position of the blocked injection outlets 311. Grease overflows from the high injection outlets 311 to lubricate the higher side of the spherical crown lining plate 300. When the injection outlet 311 is closer to the edge of the spherical crown lining plate 300, the lubrication range of the grease can be expanded. When the injection outlet 311 is closer to the center of the spherical crown lining plate 300, the space of the injection channel 310 that the insertion part 720 can occupy is larger, and more grease will overflow.

[0045] Exemplarily, there are multiple injection channels 310, and the multiple injection channels 310 are arranged side by side, and each injection channel 310 has an injection inlet and at least two injection outlets 311 arranged along the sliding direction of the middle cover plate 200. Of the two injection outlets 311, one injection outlet 311 is close to the edge of the spherical crown lining plate 300, and the other injection outlet 311 is close to the center of the spherical crown lining plate 300. The injection inlet is close to the injection outlet 311 close to the center of the spherical crown lining plate 300. In this way, when the first limiting structure 210 and the plug 700 are pressed tightly, the injection outlet 311 that is not blocked can be located at a higher position of the spherical crown lining plate 300, and the volume of grease overflowing through the injection outlet 311 is also larger, which can lubricate a larger range of the spherical crown lining plate 300 and the middle cover plate 200. Preferably, the injection channels 310 can also be divided into two groups, and the injection inlets of the two groups of injection channels 310 are located on opposite sides of the spherical crown lining 300. No matter which side the first limiting structure 210 is tightly pressed against the plug 700, the lubrication effect on the spherical crown lining 300 and the middle cover plate 200 is very good in both cases.

[0046] For example, in some embodiments, the injection channel 310 may have two injection inlets disposed opposite to each other, so that during the sliding process of the middle cover plate 200 , the grease in the injection channel 310 can have a certain speed and quickly overflow from the injection outlet 311 .

[0047] A flat slide plate 500 is provided between the spherical crown lining plate 300 and the middle cover plate 200. The flat slide plate 500 is relatively wear-resistant and not easily worn. The flat slide plate 500 is generally installed on the surface of the spherical crown lining plate 300 so that the flat slide plate 500 can be lubricated for a long time. A mounting groove 320 is provided on the surface of the spherical crown lining plate 300, and the flat slide plate 500 is placed in the mounting groove 320. In addition, the thickness of the flat slide plate 500 is greater than the depth of the mounting groove 320, so that part of the flat slide plate 500 is raised relative to the surface of the spherical crown lining plate 300, avoiding direct contact between the spherical crown lining plate 300 and the middle cover plate 200, which causes the spherical crown lining plate 300 to be worn.

[0048] Since the flat slide 500 is installed on the surface of the spherical cap lining 300, the injection outlet 311 of the injection channel 310 can be set on the surface of the spherical cap lining 300 where the flat slide 500 is not set, or the injection outlet 311 is directly set at the flat slide 500. In the process of injecting grease into the injection channel 310, when the injection outlet 311 is located at the flat slide 500, after the grease overflows from the injection outlet 311, it can directly contact the surface of the flat slide 500 and the middle cover plate 200, and the lubrication effect is better. When the injection outlet 311 is located on the surface of the spherical cap lining 300, there is no object blocking the injection outlet 311, the grease overflows at a faster rate, and the grease injection can be completed quickly. Therefore, the injection outlet 311 can be set on the flat slide 500 and the spherical cap lining 300 at the same time to improve the grease injection efficiency and lubrication effect.

[0049] In some embodiments of the present application, in order to avoid the situation where the grease overflowing from the injection outlet 311 located at a high position of the spherical crown lining 300 stays at the high position for a short time when the spherical crown lining 300 rotates to the extreme position, resulting in a poor lubrication effect, a flat slide 500 can be provided between the two injection outlets 311 to block the grease, thereby increasing the residence time of the grease at the height of the spherical crown lining 300.

[0050] Exemplarily, only one planar slide plate 500 may be provided, the grease outlet is provided around the planar slide plate 500, and the injection outlets 311 of the same injection channel 310 are located on both sides of the planar slide plate 500. A plurality of planar slide plates 500 may also be provided, and a planar slide plate 500 is provided between any two adjacent injection outlets 311 of the same injection channel 310, as shown in FIG. Figure 8As shown. In the case where the injection outlet 311 is located on the plane slide 500, if two adjacent injection outlets 311 are located on the same slide, the flow of grease on the plane slide 500 is restricted due to the contact between the plane slide 500 and the middle cover plate 200, and the grease is not easy to flow toward the lower position of the spherical cap lining plate 300. If two adjacent injection outlets 311, one is located on the surface of the spherical cap lining plate 300, and the other is located on the plane slide 500, the two injection outlets 311 are blocked by part of the plane slide 500, and the flow of grease is restricted.

[0051] In the case where there are multiple planar slide plates 500, multiple grease outlets may also be provided. Figure 7 As shown, a plurality of grease outlets and a plurality of planar slide plates 500 are arranged at intervals to improve the lubrication effect on the planar slide plates 500 so that the planar slide plate 500 located at the center of the spherical cap liner 300 can also be well lubricated.

[0052] The injection channel 310 may be provided in plurality, and the plurality of injection channels 310 are arranged side by side, referring to Fig. 9 As shown. The first limiting structure 210 can be pressed against multiple plugs 700 at one time, thereby increasing the amount of grease overflowing from the injection channel 310. In some embodiments, the injection channel 310 has an injection outlet 311 arranged near the edge of the spherical cap lining 300. The injection outlet 311 located at the edge can contact the surface of the middle cover plate 200 closer to the first limiting structure 210, thereby expanding the lubrication range of the middle cover plate 200. The plug 700 also has a buffer layer, which is arranged on the side of the plug 700 away from the injection channel 310 to avoid stress concentration between the plug 700 and the first limiting structure 210, resulting in damage to the structure of the first limiting structure 210.

[0053] A sealing ring 600 may also be provided between the spherical crown lining plate 300 and the middle cover plate 200 . The sealing ring 600 is pressed between the middle cover plate 200 and the spherical crown lining plate 300 , and the sealing ring 600 is provided around the injection outlet 311 to limit the grease within a certain range and make full use of the grease.

[0054] The support also includes a second limiting structure 110, which is fixed to one of the upper support 100 and the middle cover plate 200, and cooperates with the other in the sliding direction of the upper support 100. When the upper support 100 slides to the limit position, the second limiting structure 110 can limit the position of the upper support 100 to prevent the upper support 100 from sliding too far and causing the beam body to fall. The lower support 400 is provided with a groove, and the spherical cap lining plate 300 is rotatably installed in the groove. The edge of the groove is provided with a limiting structure to prevent the spherical cap lining plate 300 from rotating excessively.

[0055] The contact surface between the upper support 100 and the middle cover plate 200 is spherical, so that the upper support 100 and the middle cover plate 200 have an automatic reset function. Under the action of gravity and the spherical surface, the upper support 100 can slide toward the equilibrium position. An upper spherical slide plate 810 is generally provided between the upper support 100 and the middle cover plate 200, and a lower spherical slide plate 820 is also provided between the spherical cap lining plate 300 and the lower support 400 to improve the wear resistance of the support.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A separate multi-stage friction damping support, characterized in that: The invention comprises an upper support (100), an intermediate cover plate (200), a spherical cap lining plate (300) and a lower support (400) which are arranged in sequence and overlap each other, wherein the upper support (100) and the intermediate cover plate (200) are slidably matched, the intermediate cover plate (200) and the spherical cap lining plate (300) are slidably matched, and the spherical cap lining plate (300) and the lower support (400) are rotationally matched; An injection channel (310) is provided inside the spherical cap lining (300), and the injection channel (310) is used to inject lubricating liquid. An injection outlet (311) of the injection channel (310) is located on a side of the spherical cap lining (300) facing the middle cover plate (200).

2. A separate multi-stage friction damping support according to claim 1, characterized in that: The middle cover plate (200) is connected to a first limiting structure (210), and the first limiting structure (210) can stop and limit with the spherical cap lining plate (300) in the sliding direction of the middle cover plate (200), and the injection inlet of the injection channel (310) is installed with a plug (700), wherein: The plug (700) has an insertion portion (720), part of which is inserted into the injection channel (310), and part of which is located outside the injection channel (310), and the plug (700) is located on the sliding path of the first limiting structure (210), and the first limiting structure (210) can be engaged with the plug (700) to increase the length of the insertion portion (720) located in the injection channel (310); or, the plug (700) has a threaded connection portion (710), and the threaded connection portion (710) is threadedly connected to the injection channel (310).

3. A separate multi-stage friction damping support according to claim 2, characterized in that: The injection channel (310) has at least two injection outlets (311) arranged along the sliding direction of the middle cover plate (200), and the injection inlet of the injection channel (310) is arranged close to one of the injection outlets (311), and along the extension direction of the injection channel (310), the length of the insertion part (720) corresponding to the injection inlet is greater than the distance between the injection inlet and the injection outlet (311) close to it.

4. A separate multi-stage friction damping support according to claim 3, characterized in that: A flat slide plate (500) is installed on the side of the spherical crown lining (300) facing the middle cover plate (200), and a portion of the flat slide plate (500) is protruded relative to the surface of the spherical crown lining (300). The flat slide plate (500) is slidably matched with the middle cover plate (200), and the injection outlet (311) is located on the surface of the flat slide plate (500), and / or the injection outlet (311) is located on the surface of the spherical crown lining (300).

5. A separate multi-stage friction damping support according to claim 4, characterized in that: Along the extension direction of the injection channel (310), at least a portion of the planar slide plate (500) is provided between any two adjacent injection outlets (311).

6. A separate multi-stage friction damping support according to claim 2, characterized in that: The injection channel (310) has two injection inlets arranged opposite to each other.

7. The separated multi-stage friction damping support according to claim 2, characterized in that: The injection channel (310) has an injection outlet (311) disposed close to the edge of the spherical cap lining (300).

8. The separated multi-stage friction damping support according to claim 2, characterized in that: There are multiple injection channels (310), and the multiple injection channels (310) are arranged side by side.

9. The separated multi-stage friction damping support according to claim 2, characterized in that: The plug (700) further comprises a buffer layer, and the buffer layer is arranged on a side of the plug (700) facing away from the injection channel (310).

10. The separated multi-stage friction damping support according to claim 1, characterized in that: The support further comprises a second limiting structure (110), wherein the second limiting structure (110) is fixed to one of the upper support (100) and the middle cover plate (200), and is limitedly matched with the other one in the sliding direction of the upper support (100); And / or, the surface of the upper support (100) in contact with the middle cover plate (200) is spherical.

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