Gravity self-resetting friction sliding support

Abstract

The invention provides a gravity self-resetting friction sliding support, and belongs to the technical field of supports. The support comprises a first support plate, a rubber support body, a second support plate and at least one friction assembly. The first support plate, the rubber support body and the second support plate are sequentially overlapped and fixed in the first direction, and the friction assembly is fixedly installed in the rubber support body. The friction assembly comprises a first friction plate and a second friction plate which are sequentially arranged in an overlapped mode in the first direction, the first friction plate is provided with a first friction face, the second friction plate is provided with a second friction face, and the first friction face and the second friction face are both in a wave shape and are oppositely arranged. And the first friction plate and the second friction plate are meshed with each other. The friction assembly is arranged in the rubber support body, the first friction face and the second friction face are both in a wave shape, the probability that the rubber support body is torn is reduced, meanwhile, the self-reset capacity of the support can be achieved through gravity, the defect that a traditional self-reset support needs an additional spring device is overcome, and the service life of the support is prolonged. The post-earthquake practical performance of the support is greatly improved, and post-earthquake self-resetting of the support is achieved with low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of supports, and in particular relates to a gravity self-resetting friction sliding support. Background Art

[0002] In the prior art, rubber bearings and friction pendulum bearings are the most widely used seismic isolation bearings in actual engineering. However, the seismic isolation bearings commonly used in existing engineering projects are difficult to take into account both energy dissipation and shock absorption and post-earthquake recovery performance.

[0003] Among rubber bearings, lead rubber bearings or high damping rubber bearings with better energy dissipation capacity are usually selected. However, earthquake damage survey results and experimental studies have shown that the energy dissipation caused by the plastic deformation of the lead core or the strain hysteresis of the high damping rubber will cause the bearing to produce a large residual displacement, and even cause rubber tearing. This seriously affects the post-earthquake recoverability and seismic isolation performance of rubber bearings, and also increases the cost of replacement or repair after an earthquake.

[0004] In theory, friction pendulum bearings can take into account good cycle extension capacity, energy dissipation capacity and certain reset capacity. However, some earthquake damage and test results show that in order to achieve a better isolation effect, the curvature radius of the friction pendulum bearing is usually large, and its mechanical geometric characteristics determine that the closer the slider is to the geometric center, the smaller its restoring force is, so it cannot overcome the friction force and achieve self-reset. Summary of the invention

[0005] The purpose of this application is to provide a gravity self-resetting friction sliding support to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented by: An embodiment of the present application provides a gravity self-resetting friction sliding bearing, including a first bearing plate, a rubber bearing body, a second bearing plate and at least one group of friction components; the first bearing plate, the rubber bearing body and the second bearing plate are overlapped and fixed in sequence along a first direction, and the friction component is fixedly installed inside the rubber bearing body; the friction component includes a first friction plate and a second friction plate which are overlapped and arranged in sequence along the first direction, the first friction plate has a first friction surface, the second friction plate has a second friction surface, the first friction surface and the second friction surface are both wavy, the first friction surface and the second friction surface are arranged facing each other, and the first friction plate and the second friction plate are arranged to mesh with each other.

[0007] The beneficial effects of this application are: In the present application, by arranging a friction assembly in the main body of the rubber bearing, in an earthquake, after the shear deformation of the main body of the rubber bearing reaches the design target value, the first friction plate and the second friction plate in the friction assembly can rub against each other to dissipate the seismic force, thereby preventing the main body of the rubber bearing from further deforming to dissipate the seismic force, preventing the bearing from generating a large residual displacement, and avoiding the occurrence of rubber tearing; and the first friction plate and the second friction plate are arranged by meshing the first and second wavy friction surfaces, and the wavy structure can provide a reset force for the first friction plate and the second friction plate, so that the bearing can have a tendency to return to the initial state under the action of gravity, and the wavy structure increases the action points of the reset force between the first friction plate and the second friction plate, thereby enhancing the reset ability of the bearing; at the same time, since the friction assembly is located inside the main body of the rubber bearing, the first friction plate and the second friction plate can also provide a reset force during the process of the main body of the rubber bearing recovering its deformation, thereby further improving the reset ability of the bearing; the self-reset ability of the bearing can be achieved by relying on gravity, thereby overcoming the disadvantage that the traditional self-reset bearing requires an additional spring device, greatly improving the practical performance of the bearing after an earthquake, and achieving the self-reset of the bearing after an earthquake at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 This is a schematic diagram of the overall structure of the support provided in some embodiments of the present application. Figure 1 ; Figure 2 This is a schematic diagram of the split structure of the support provided in some embodiments of the present application Figure 1 ; Figure 3 is a schematic diagram of the structure of a friction assembly provided in some embodiments of the present application; Figure 4 This is a schematic diagram of the overall structure of the support provided in some embodiments of the present application. Figure 2 ; Figure 5 This is a schematic diagram of the split structure of the support provided in some embodiments of the present application Figure 2 ; Figure 6 is a top view of a support provided in some embodiments of the present application; Figure 7 The structure of the second friction plate provided in some embodiments of the present application is shown in FIG. Figure 1 ; Figure 8The structure of the second friction plate provided in some embodiments of the present application is shown in FIG. Figure 2 ; Fig. 9 It is a schematic diagram of the cooperation between the rubber bearing body and the friction assembly provided in some embodiments of the present application.

[0010] In the figure: 100-first support plate, 200-rubber support body, 210-first mounting groove, 220-second mounting groove, 230-third mounting groove, 300-second support plate, 400-friction assembly, 410-first friction plate, 411-first friction surface, 420-second friction plate, 421-second friction surface, 500-flat steel plate, 600-first sealing plate, 700-second sealing plate, 800-connecting bolts. DETAILED DESCRIPTION

[0011] 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.

[0012] The present application embodiment provides a gravity self-resetting friction sliding support, referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the support includes a first support plate 100 , a rubber support body 200 , a second support plate 300 and at least one set of friction components 400 .

[0013] The first support plate 100, the rubber support body 200 and the second support plate 300 are overlapped and fixed in sequence, and the overlapping direction of the three is defined as the first direction. The first direction can be referred to Figures 1 to 5 The rubber support body 200 is fixed between the first support plate 100 and the second support plate 300. As the main component of the support, when the first support plate 100 and the second support plate 300 are in relative position, the rubber support body 200 is deformed to adapt to the change of the positions of the two.

[0014] In actual use, one of the first bearing plate 100 and the second bearing plate 300 is fixed to the upper structure of the bridge, and the other is fixed to the lower structure of the bridge. The main material of the rubber bearing body 200 is rubber, which has a certain elasticity and can be deformed under the action of external force. The rubber bearing body 200 is fixed between the first bearing plate 100 and the second bearing plate 300 to adapt to the position change between the first bearing plate 100 and the second bearing plate 300 and the vibration of the bridge, so that the bridge can operate normally. And the rubber bearing body 200 can restore the deformation after the external force disappears.

[0015] The bearing can be a bridge bearing used in the bridge field, or a building bearing used in the construction field, or it can be used in other fields where a bearing is needed.

[0016] refer to Figure 1 and Figure 4 As shown, the friction assembly 400 is fixedly installed inside the rubber bearing body 200. The friction assembly 400 includes a first friction plate 410 and a second friction plate 420 that are overlapped along a first direction. The overlapping direction of the first friction plate 410 and the second friction plate 420 is the same as the overlapping direction of the first bearing plate 100, the rubber bearing body 200 and the second bearing plate 300. Figure 3 As shown, the first friction plate 410 has a first friction surface 411, and the second friction plate 420 has a second friction surface 421, and the first friction surface 411 and the second friction surface 421 are both wavy. The wavy shape is a shape with wavy undulating characteristics. The first friction surface 411 is wavy to form a plurality of grooves or protrusions, and the second friction surface 421 is wavy to form a plurality of grooves or protrusions. The first friction surface 411 and the second friction surface 421 are arranged opposite to each other, and the grooves or protrusions of the first friction surface 411 and the protrusions or grooves of the second friction surface 421 are meshed with each other, so that the first friction plate 410 and the second friction plate 420 are meshed with each other, so that the support can be self-reset after the earthquake under the action of gravity. The first friction surface 411 and the second friction surface 421 can be a smooth curved surface structure, or can be formed by continuous bending of a plane.

[0017] When the length of the bridge changes due to temperature change, material shrinkage, creep, etc., the first support plate 100 and the second support plate 300 can move relative to each other to adapt to the position change between the bridge superstructure and the bridge substructure.

[0018] When an earthquake occurs and the earthquake intensity is relatively low, the first bearing plate 100 and the second bearing plate 300 are relatively displaced, and the rubber bearing body 200 is deformed to perform the seismic isolation function and dissipate the earthquake force. Since the earthquake intensity is relatively low and the relative displacement of the first bearing plate 100 and the second bearing plate 300 is relatively small, the rubber bearing body 200 can achieve self-reset after the earthquake after deformation. As the earthquake intensity gradually increases, the relative displacement of the first bearing plate 100 and the second bearing plate 300 further increases. After the shear deformation of the rubber bearing body 200 reaches the design target value, the first friction plate 410 and the second friction plate 420 in the friction assembly 400 can rub against each other to dissipate the earthquake force, limit the continued increase of the rubber shear strain, and avoid further deformation of the rubber bearing body 200, resulting in a large residual displacement of the rubber bearing body 200 and rubber tearing of the rubber bearing body 200. In addition, under the action of rare or even extremely rare earthquakes, the sliding displacement between the first friction plate 410 and the second friction plate 420 can approach the maximum design value, further limiting the increase of the rubber shear strain and reducing the possibility of tearing of the rubber bearing body 200.

[0019] Due to the existence of the friction assembly 400, the mutual movement of the first friction plate 410 and the second friction plate 420 can dissipate part of the earthquake force, avoid the rubber support body 200 from further deformation to dissipate the earthquake force, and reduce or even avoid the tearing of the rubber support body 200. In addition, since the rubber support body 200 is elastic, the friction assembly 400 is installed inside the rubber support body 200. After the earthquake, the rubber support body 200 can also provide a restoring force for the first friction plate 410 and the second friction plate 420 in the process of restoring the deformation, so as to facilitate the first friction plate 410 and the second friction plate 420 to reset.

[0020] Since the first friction plate 410 and the second friction plate 420 are meshed by the wavy first friction surface 411 and the second friction surface 421, the surface of the wavy structure can provide multiple meshing positions between the first friction plate 410 and the second friction plate 420. When the two friction plates are relatively displaced, there may be multiple contact points between the first friction plate 410 and the second friction plate 420. Since the contact position of the two friction plates is an inclined surface, under the action of gravity, the inclined surface can provide a reset force for the first friction plate 410 and the second friction plate 420, so that the support can have a tendency to return to the initial state under the action of gravity. Since there are multiple contact points between the first friction plate 410 and the second friction plate 420, the reset force received by the two can be distributed more evenly on themselves, thereby enhancing the reset ability of the support. In addition, the friction assembly 400 is located inside the rubber support body 200. In the process of restoring the deformation, the rubber support body 200 can also provide a reset force for the first friction plate 410 and the second friction plate 420, further improving the reset ability of the support. Moreover, during the reset process of the first friction plate 410 and the second friction plate 420, the two friction plates can also drive the rubber connected thereto to return to the initial state. The friction assembly 400 and the rubber support body 200 cooperate with each other to improve the recoverability of the support, and can achieve the self-reset ability of the support by gravity, overcoming the disadvantage that the traditional self-reset support requires an additional spring device, greatly improving the practical performance of the support after an earthquake, and achieving the self-reset of the support after an earthquake at a low cost.

[0021] In some preferred embodiments, reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a plurality of plane steel plates 500 are also installed in the rubber bearing body 200. The plane steel plates 500 are arranged in parallel with the first bearing plate 100 to bear the vertical load. In addition, the plurality of plane steel plates 500 are arranged in a first direction, and rubber is filled between two adjacent plane steel plates 500. The plane steel plates 500 improve the vertical bearing capacity of the rubber bearing body 200, and the plane steel plates 500 enhance the structural strength of the rubber bearing body 200, which can reduce the possibility of the rubber being torn during the deformation process.

[0022] The friction assembly 400 installed in the rubber bearing body 200 can be fixedly installed between two adjacent flat steel plates 500. The first friction plate 410 and the second friction plate 420 are directly fixed to the flat steel plate 500, which improves the installation stability of the friction assembly 400 in the rubber bearing body 200. In addition, after an earthquake, during the process of resetting the first friction plate 410 and the second friction plate 420, the interaction force between the flat steel plate 500 and the friction assembly 400 is stronger, and the friction assembly 400 and the rubber bearing body 200 can be reset faster.

[0023] In some embodiments of the present application, reference Figures 1 to 5 As shown, in the friction assembly 400, the circumferential side wall of the first friction plate 410 and the circumferential side wall of the second friction plate 420 are arranged flush. The friction assembly 400 is fixed inside the rubber support body 200, and the circumferential side walls of the first friction plate 410 and the second friction plate 420 abut against the rubber support body 200. Since the circumferential side walls of the first friction plate 410 and the second friction plate 420 are arranged flush, the surface of the rubber support body 200 abutting against the circumferential side walls of the first friction plate 410 and the second friction plate 420 is a flat surface, and the stress concentration points of this part of the rubber support body 200 are relatively small. In the process of relative sliding of the first friction plate 410 and the second friction plate 420, the rubber support body 200 is not easy to be torn even if it is pulled.

[0024] Further preferably, the circumferential sidewalls of the first friction plate 410 and the circumferential sidewalls of the second friction plate 420 are both arranged parallel to the first direction, so that the thickness of the rubber bearing body 200 covering the circumference of the friction assembly 400 can be kept stable along the first direction, thereby ensuring the structural stability of the rubber bearing body 200. The thickness of the rubber bearing body 200 refers to the thickness of the rubber bearing body 200 between the circumferential sidewalls of the rubber bearing body 200 and the circumferential sidewalls of the friction assembly 400 in the radial direction of the bearing.

[0025] The friction assembly 400 is fixedly installed between two adjacent planar steel plates 500. In some embodiments of the present application, Figure 1 and Figure 2 As shown, the projections of the friction assembly 400 on the plane steel plate 500 along the first direction are all located within the range of the plane steel plate 500, that is, in the radial direction of the support, the size of the friction assembly 400 is smaller than the size of the plane steel plate 500. The smaller the size of the friction assembly 400, the thicker the thickness of the rubber support body 200 circumferentially covered by it, and in the event of slippage of the first friction plate 410 and the second friction plate 420, the ability of the rubber support body 200 to withstand lateral loads is higher and it is not easy to be torn.

[0026] The number of friction components 400 in the rubber bearing body 200 is generally selected according to the target equivalent damping ratio. If the designed damping ratio is relatively high, more friction components 400 can be arranged, and vice versa. In the friction component 400, the friction coefficient between the first friction plate 410 and the second friction plate 420 is determined according to the design requirements. In some embodiments, the friction coefficient can be set between 0.03 and 0.15, so as to enhance the energy dissipation capacity of the bearing without affecting the reset ability of the rubber bearing body 200.

[0027] When the number of friction components 400 is greater than or equal to two, multiple groups of friction components 400 are arranged in parallel inside the rubber bearing body 200, and a certain distance is required between two adjacent groups of friction components 400 to reduce the impact on the structural strength of the rubber bearing body 200. In some embodiments of the present application, the number of plane steel plates 500 between two adjacent groups of friction components 400 is greater than or equal to three, and the space between adjacent plane steel plates 500 is filled with rubber, so that at least two layers of rubber are spaced between two adjacent groups of friction components 400. The friction components 400 are distributed at intervals, and when dissipating seismic forces, both groups of friction components 400 can be fully utilized.

[0028] In addition, in some embodiments of the present application, the thickness of the flat steel plate 500 is less than the distance between two adjacent flat steel plates 500. The flat steel plate 500 should not be too thick, as it will affect the cushioning and seismic isolation effect of the rubber bearing body 200.

[0029] In other embodiments of the present application, reference Figure 2 As shown, the surface of the rubber bearing body 200 close to the first bearing plate 100 is concave to form a first mounting groove 210, and a first sealing plate 600 is fixedly installed in the first mounting groove 210. The first sealing plate 600 is fixedly connected to the first bearing plate 100, and the circumferential side walls of the first sealing plate 600 are tightly fitted with the inner walls of the first mounting groove 210.

[0030] The first sealing plate 600 is embedded in the rubber bearing body 200, and the rubber bearing body 200 is connected to the first bearing plate 100 through the first sealing plate 600, and part of the rubber bearing body 200 is arranged around the first sealing plate 600, which can improve the stability of the overall structure of the bearing. If the rubber bearing body 200 is directly connected to the first bearing plate 100, the connection structure between the rubber bearing body 200 and the first bearing plate 100 is easily damaged after shear deformation occurs, affecting the normal use of the bearing.

[0031] and / or, reference Figure 2 As shown, the surface of the rubber bearing body 200 close to the second bearing plate 300 is concave to form a second mounting groove 220, and a second sealing plate 700 is fixedly installed in the second mounting groove 220. The second sealing plate 700 is fixedly connected to the second bearing plate 300, and the circumferential side walls of the second sealing plate 700 are tightly matched with the inner wall of the second mounting groove 220. The second sealing plate 700 is embedded in the rubber bearing body 200, and the connection stability between the rubber bearing body 200 and the second bearing plate 300 is improved by providing the second sealing plate 700.

[0032] In a specific implementation, the second sealing plate 700 and the second support plate 300 , as well as the first sealing plate 600 and the first support plate 100 are usually fixed by connecting bolts 800 .

[0033] In some other embodiments of the present application, the friction assembly 400 is directly connected to the first support plate 100 or the second support plate 300. Figure 4 and Figure 5 As shown, the surface of the rubber bearing body 200 close to the first bearing plate 100 and / or the second bearing plate 300 is concave to form a third mounting groove 230, and the friction component 400 is fixedly installed in the third mounting groove 230, and the friction component 400 is fixedly connected to the first bearing plate 100 or the second bearing plate 300 corresponding to the third mounting groove 230, and the circumferential side walls of the friction component 400 are tightly fitted with the inner walls of the third mounting groove 230.

[0034] The rubber bearing body 200 is directly connected to the first bearing plate 100 and the second bearing plate 300 through the friction assembly 400, thereby improving the connection stability between the rubber bearing body 200 and the first bearing plate 100 and the second bearing plate 300. The first bearing plate 100 or the second bearing plate 300 corresponding to the third mounting groove 230 means that if the third mounting groove 230 is disposed on the surface of the rubber bearing body 200 close to the first bearing plate 100, the third mounting groove 230 corresponds to the first bearing plate 100; if the third mounting groove 230 is disposed on the surface of the rubber bearing body 200 close to the second bearing plate 300, the third mounting groove 230 corresponds to the second bearing plate 300.

[0035] A set of friction components 400 is installed in a third installation groove 230. The friction components 400 can be installed on the top and bottom of the rubber support body 200, or only on the top or bottom. The side of the rubber support body 200 close to the first support plate 100 is the top, and the side close to the second support plate 300 is the bottom. The inner wall of the third installation groove 230 is tightly matched with the circumferential side wall of the friction component 400 to stabilize the position of the friction component 400.

[0036] In some embodiments of the present application, the number of friction assemblies 400 is set to one group or more. In each group of friction assemblies 400, the first friction plate 410 and the second friction plate 420 are limited in the same direction. The support corresponding to the friction assembly 400 is a one-way support, which dissipates seismic force in the limiting direction of the first friction plate 410 and the second friction plate 420.

[0037] In some other embodiments of the present application, the friction assembly 400 is provided with two or more groups, referring to Fig. 9As shown, in one set of friction components 400, the first friction plate 410 and the second friction plate 420 are limited in the second direction, and in one set of friction components 400, the first friction plate 410 and the second friction plate 420 are limited in the third direction. The second direction and the third direction are both perpendicular to the first direction, and the second direction and the third direction are intersecting. The first direction is referenced Fig. 9 The y-axis direction shown, the second direction reference Fig. 9 The x-axis direction shown, the third direction reference Fig. 9 The bearing is a bidirectional decoupled bearing, and the bearing can dissipate seismic forces in the second direction and the third direction.

[0038] In the one-way support and the two-way decoupling support, the structures of the first friction plate 410 and the second friction plate 420 can refer to Figure 8 As shown, In other embodiments of the present application, reference Figure 6 and Figure 7 As shown, the first friction plate 410 and the second friction plate 420 are limited in radial direction of the support. The groove or protrusion formed by the first friction surface 411 and the second friction surface 421 is annular, so that the first friction plate 410 and the second friction plate 420 can be limited in radial direction of the support. When the support moves in any radial direction, the first friction plate 410 and the second friction plate 420 can slide and fit to dissipate the seismic force. The support is a universal support.

[0039] The cross-section of the rubber support body 200 may be circular or square, which is not limited in the embodiments provided in the present application.

[0040] 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 gravity self-resetting friction sliding support, characterized in that: It comprises a first support plate (100), a rubber support body (200), a second support plate (300), and at least one set of friction components (400); The first support plate (100), the rubber support body (200), and the second support plate (300) are overlapped and fixed in sequence along a first direction, and the friction assembly (400) is fixedly installed inside the rubber support body (200); The friction assembly (400) comprises a first friction plate (410) and a second friction plate (420) which are arranged in sequence and overlap each other along a first direction; the first friction plate (410) has a first friction surface (411); the second friction plate (420) has a second friction surface (421); the first friction surface (411) and the second friction surface (421) are both wavy; the first friction surface (411) and the second friction surface (421) are arranged facing each other; and the first friction plate (410) and the second friction plate (420) are arranged to mesh with each other.

2. The gravity self-resetting friction sliding support according to claim 1, characterized in that: A plurality of planar steel plates (500) are also installed in the rubber support body (200), the planar steel plates (500) are arranged in parallel with the first support plate (100), and the plurality of planar steel plates (500) are arranged along a first direction, rubber is filled between two adjacent planar steel plates (500), and the friction assembly (400) is fixedly installed between two adjacent planar steel plates (500).

3. The gravity self-resetting friction sliding support according to claim 2, characterized in that: The circumferential side wall of the first friction plate (410) and the circumferential side wall of the second friction plate (420) are arranged flush with each other and are both arranged parallel to the first direction.

4. The gravity self-resetting friction sliding support according to claim 2, characterized in that: Projections of the friction assembly (400) on the adjacent planar steel plates (500) along the first direction are all located within the range of the planar steel plates (500).

5. The gravity self-resetting friction sliding support according to claim 2, characterized in that: The number of the planar steel plates (500) between two adjacent groups of the friction assemblies (400) is greater than or equal to three.

6. The gravity self-resetting friction sliding support according to claim 2, characterized in that: The thickness of the planar steel plates (500) is smaller than the distance between two adjacent planar steel plates (500).

7. The gravity self-resetting friction sliding support according to claim 1, characterized in that: The surface of the rubber support body (200) close to the first support plate (100) is concave to form a first installation groove (210), a first sealing plate (600) is fixedly installed in the first installation groove (210), the first sealing plate (600) is fixedly connected to the first support plate (100), and the circumferential side walls of the first sealing plate (600) are tightly matched with the inner wall of the first installation groove (210); And / or, the surface of the rubber support body (200) close to the second support plate (300) is concave to form a second installation groove (220), a second sealing plate (700) is fixedly installed in the second installation groove (220), the second sealing plate (700) is fixedly connected to the second support plate (300), and the circumferential side walls of the second sealing plate (700) are tightly fitted with the inner wall of the second installation groove (220).

8. The gravity self-resetting friction sliding support according to claim 1, characterized in that: The surface of the rubber bearing body (200) close to the first bearing plate (100) and / or the second bearing plate (300) is concave to form a third mounting groove (230), the friction component (400) is fixedly installed in the third mounting groove (230), and the friction component (400) is fixedly connected to the first bearing plate (100) or the second bearing plate (300) corresponding to the third mounting groove (230), and the circumferential side walls of the friction component (400) are tightly matched with the inner walls of the third mounting groove (230).

9. The gravity self-resetting friction sliding support according to claim 1, characterized in that: The friction components (400) have two or more groups; In one group of the friction assemblies (400), the first friction plate (410) and the second friction plate (420) are limitedly matched along the second direction; in one group of the friction assemblies (400), the first friction plate (410) and the second friction plate (420) are limitedly matched along the third direction; The second direction and the third direction are both arranged perpendicular to the first direction, and the second direction intersects with the third direction.

10. The gravity self-resetting friction sliding support according to claim 1, characterized in that: The first friction plate (410) and the second friction plate (420) are matched in a radially limited manner along the support.

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