A multi-directional elastic support bridge bearing mechanism and its application method

Abstract

This invention discloses a multi-directional elastic support bridge bearing mechanism and its usage method, relating to the field of bridge bearings. The invention features friction ring plates on the upper and lower bearing plates, with alternating smooth and rough annular surfaces on the friction ring plates. Multiple raised rings are arranged on the sealing rubber ring, making contact with the smooth annular surfaces. When the bearing is under stress, the raised rings of the sealing rubber ring are restricted by the resistance of the rough annular surfaces, resulting in a more balanced lateral deformation increment on both sides of the raised rings under compression, thus preventing excessive wear in localized areas or directions. Simultaneously, the inclusion of a heat-absorbing alloy ring and its cooperation with the sealing rubber ring efficiently dissipates heat generated by friction within the spherical bearing, mitigating frictional wear between the spherical rigid liner and the upper and lower polytetrafluoroethylene plates to some extent.

Description

Technical Field

[0001] This invention relates to the field of bridge bearings, and more particularly to a multi-directional elastic support bridge bearing mechanism and its usage method. Background Technology

[0002] In bridge bearings, spherical bearings are a type of bearing that combines planar and curved surfaces. A spherical bearing achieves horizontal movement through the sliding of the planar portion of the support plate, while its rotational function is realized through the planar and curved portions. If the curved portion of this type of bearing is made into a spherical surface, it becomes an omnidirectional rotational bearing. The smaller the radius of curvature of the curved surface, the greater the rotational range can be achieved. The horizontal movement and rotational functions of this type of bearing depend on the coefficient of friction between the support plate and the contact sliding material; therefore, dust prevention and protective measures must be taken to prevent wear and an increase in the coefficient of friction.

[0003] When taking dustproof and protective measures for spherical bearings, firstly, because the bearing is frequently subjected to forces from various directions, the rubber ring used for sealing and dustproofing is prone to uneven stress, resulting in excessive wear in localized areas and directions, reducing the actual service life of the rubber ring, and affecting the dustproof effect of the spherical bearing in the later stages. Secondly, due to the frequent "micro" dynamic friction between the spherical rigid liner plate and the upper and lower PTFE plates in the spherical bearing, coupled with the high extrusion and conduction forces, a certain amount of heat is easily generated. In addition, the spherical rigid liner plate and the upper and lower PTFE plates in the spherical bearing need to be isolated from the outside to ensure dustproof performance, resulting in a high temperature of friction contact between the spherical rigid liner plate and the upper and lower PTFE plates, which will undoubtedly have a negative effect on the friction between the spherical rigid liner plate and the upper and lower PTFE plates. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-directional elastic support bridge bearing mechanism and its usage method, so that the lateral deformation direction of the sealing rubber ring is more balanced, avoiding excessive wear of the sealing rubber ring in local positions and directions, and also efficiently dissipating the heat generated by friction in the internal environment of the spherical bearing, thereby reducing the frictional loss between the spherical rigid liner and the polytetrafluoroethylene plates on the upper and lower sides to a certain extent.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention provides a multi-directional elastic support bridge bearing mechanism. The bearing mechanism includes a lower bearing plate, an upper bearing plate, and a spherical rigid liner plate located between the lower bearing plate and the upper bearing plate. A spherical polytetrafluoroethylene (PTFE) plate is disposed on the lower side of the spherical rigid liner plate, and a planar PTFE plate and a stainless steel plate are disposed on the upper side of the spherical rigid liner plate. The bearing mechanism includes an annular sealing assembly located between the lower bearing plate and the upper bearing plate, and the sealing assembly is located on the periphery of the spherical rigid liner plate.

[0007] The sealing assembly includes a heat-absorbing alloy ring and sealing rubber rings fitted on the upper and lower sides of the heat-absorbing alloy ring. The inner circumference of the heat-absorbing alloy ring is uniformly provided with multiple inner heat-absorbing protrusions facing the spherical rigid liner. The outer circumference of the heat-absorbing alloy ring is uniformly provided with multiple outer heat-dissipating fins that are in direct contact with the external environment. The total number of inner heat-absorbing protrusions is less than the total number of outer heat-dissipating fins, and the horizontal width of the inner heat-absorbing protrusions is greater than the horizontal width of the outer heat-dissipating fins.

[0008] The sealing rubber ring has multiple raised rings on one end of its ring surface. The radial longitudinal section of each raised ring is spherical, and a concave section is formed at the connection point between the raised ring and the sealing rubber ring. Friction rings are provided on the top side of the lower support plate and the bottom side of the upper support plate. These friction rings have multiple smooth and multiple rough ring surfaces, which are alternately distributed. The smooth ring surfaces are aligned with the raised rings. Let the roughness of any point K on the rough ring surface be λ, and the shortest straight-line distance between point K and the smooth ring surface be L. Then, the roughness λ increases with increasing distance L.

[0009] As a preferred technical solution of the bridge bearing mechanism of the present invention: the top side of the lower bearing plate is provided with an annular lower plate limiting protrusion, the bottom side of the upper bearing plate is provided with an annular upper plate limiting protrusion, and the sealing component is limited and installed in the outer area of ​​the lower plate limiting protrusion and the upper plate limiting protrusion.

[0010] As a preferred technical solution of the bridge bearing mechanism of the present invention: the heat-absorbing alloy ring is provided with mounting ring plates on both the upper and lower sides, and the sealing rubber ring is provided with an annular mounting groove. The mounting ring plates of the heat-absorbing alloy ring are installed in conjunction with the mounting grooves of the sealing rubber ring.

[0011] As a preferred technical solution of the bridge bearing mechanism of the present invention: the horizontal position of the inner heat-absorbing convex plate of the heat-absorbing alloy ring matches the horizontal position of the side of the spherical rigid liner ring.

[0012] As a preferred technical solution of the bridge bearing mechanism of the present invention: let the total number of inner heat-absorbing convex plates be M, the surface area of ​​a single inner heat-absorbing convex plate be Sa, the total number of outer heat dissipation fins be N, the surface area of ​​a single outer heat dissipation fin be Sc, the total area of ​​the non-inner heat-absorbing convex plate region on the inner ring side of the heat-absorbing alloy ring be Sn, and the total area of ​​the non-outer heat dissipation fin region on the outer ring side of the heat-absorbing alloy ring be Sw, then (N·Sc+Sw): (M·Sa+Sn)>1.

[0013] This invention provides a method for using a multi-directional elastic support bridge bearing mechanism, comprising the following:

[0014] S1. First, install one friction ring on the top side of the lower support plate and install the other friction ring on the bottom side of the upper support plate. Before the upper support plate is installed, install the sealing assembly, then install the upper support plate and reinforce the periphery.

[0015] S2. During the use of the support mechanism, the raised ring of the sealing rubber ring is squeezed, and the raised ring undergoes longitudinal deformation and compression, as well as transverse deformation increment.

[0016] S3. When the position of the lateral deformation increment of the protruding ring comes into contact with the rough ring surface of the friction ring, the lateral deformation "resistance" increases linearly. The "resistance" on the side of the protruding ring with excessive lateral deformation increment is greater than the "resistance" on the side with less lateral deformation increment, and the lateral deformation increment on both sides of the protruding ring tends to be balanced.

[0017] S4. During the use of the support mechanism, the spherical rigid liner plate rubs against the spherical polytetrafluoroethylene plate and the planar polytetrafluoroethylene plate, generating excessive heat in the inner space of the sealing component. The inner heat-absorbing protrusion of the heat-absorbing alloy ring and the inner ring side of the non-inner heat-absorbing protrusion of the heat-absorbing alloy ring absorb the heat generated in the inner space of the sealing component, while the outer heat dissipation fins of the heat-absorbing alloy ring and the outer ring side of the non-outer heat dissipation fins of the heat-absorbing alloy ring release heat to the outside.

[0018] Compared with existing technologies, the beneficial effects of this invention are:

[0019] This invention features friction ring plates on the upper and lower support plates, with alternating smooth and rough annular surfaces on the friction ring plates. Multiple raised rings are arranged on the sealing rubber ring, which press against the smooth annular surfaces. When the support is under stress, the raised rings of the sealing rubber ring are restricted by the resistance of the rough annular surfaces, resulting in a more balanced lateral deformation increment on both sides of the raised rings under compression, thus preventing excessive wear in localized areas. Simultaneously, the inclusion of a heat-absorbing alloy ring and its cooperation with the sealing rubber ring efficiently dissipates heat generated by friction within the spherical support, mitigating frictional wear between the spherical rigid liner and the upper and lower polytetrafluoroethylene plates to some extent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the bridge spherical support in this invention.

[0021] Figure 2 for Figure 1 A magnified schematic diagram of a portion of point A in the middle.

[0022] Figure 3 for Figure 2 A magnified schematic diagram of a portion of point B in the middle.

[0023] Figure 4 This is a schematic diagram of the friction ring plate in this invention.

[0024] Figure 5 This is a schematic diagram of the sealing assembly in this invention.

[0025] Figure 6 This is an exploded view of the sealing assembly in this invention.

[0026] Wherein: 1-lower support plate, 101-lower plate limiting protrusion ring; 2-spherical polytetrafluoroethylene plate; 3-spherical rigid liner plate; 4-flat polytetrafluoroethylene plate; 5-stainless steel plate; 6-upper support plate, 601-upper plate limiting protrusion ring; 7-sealing assembly, 701-heat-absorbing alloy ring, 7011-inner heat-absorbing protrusion plate, 7012-outer heat dissipation fins, 7013-mounting ring plate, 702-sealing rubber ring, 7021-protruding ring, 7022-inner concave section, 7023-mounting groove; 8-friction ring plate, 801-smooth ring surface, 802-rough ring surface. Detailed Implementation

[0027] 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.

[0028] Example 1: This invention relates to a multi-directional elastic support bridge bearing mechanism, the main structural features of which are as follows:

[0029] Please see Figure 1 The support mechanism includes a lower support plate 1, a spherical polytetrafluoroethylene plate 2, a spherical rigid liner plate 3, a planar polytetrafluoroethylene plate 4, a stainless steel plate 5, and an upper support plate 6. The lower support plate 1 is located below the spherical polytetrafluoroethylene plate 2, the spherical polytetrafluoroethylene plate 2 is located below the spherical rigid liner plate 3, the planar polytetrafluoroethylene plate 4 is located above the spherical rigid liner plate 3, the stainless steel plate 5 is located above the planar polytetrafluoroethylene plate 4, and the upper support plate 6 is located above the stainless steel plate 5. The support mechanism includes an annular sealing assembly 7 located between the lower support plate 1 and the upper support plate 6. The sealing assembly 7 is located around the spherical rigid liner plate 3.

[0030] Please see Figure 1 , Figure 2The lower support plate 1 has an annular lower plate limiting protrusion 101 on its top side and an annular upper plate limiting protrusion 601 on its bottom side. The sealing assembly 7 is installed in the outer area of ​​the lower plate limiting protrusion 101 and the upper plate limiting protrusion 601. The lower plate limiting protrusion 101 and the upper plate limiting protrusion 601 have the same radial dimensions and their central axes are collinear.

[0031] The inner heat-absorbing protrusion 7011 of the heat-absorbing alloy ring 701 is horizontally aligned with the side of the spherical rigid liner 3. The inner heat-absorbing protrusion 7011 of the heat-absorbing alloy ring 701 faces the spherical rigid liner 3, allowing it to quickly and effectively absorb the heat generated by the spherical rigid liner 3, thus reducing its temperature to some extent and mitigating overheating friction between the spherical rigid liner 3 and the spherical PTFE plate 2 and the planar PTFE plate 4. This invention does not require reducing the heat or temperature of the spherical rigid liner 3 to a very low level. If the temperature of the spherical rigid liner 3 is too low, "cold" friction between it and the spherical PTFE plate 2 and the planar PTFE plate 4 may increase wear. Therefore, a suitable temperature range is essential to ensure smooth and efficient operation of the spherical rigid liner 3 and the spherical PTFE plate 2 and the planar PTFE plate 4.

[0032] Please see Figure 2 , Figure 5 , Figure 6 The sealing assembly 7 includes a heat-absorbing alloy ring 701 and two sealing rubber rings 702, which are fitted together on the upper and lower sides of the heat-absorbing alloy ring 701. Multiple inner heat-absorbing protrusions 7011 are evenly distributed around the inner circumference of the heat-absorbing alloy ring 701, facing the spherical rigid liner plate 3. Multiple outer heat-dissipating fins 7012 are evenly distributed around the outer periphery of the heat-absorbing alloy ring 701, which are in direct contact with the external environment. The heat-absorbing alloy ring 701 can be made of copper alloy, which has good thermal conductivity and low cost. Furthermore, the vertical structure of the inner heat-absorbing protrusions 7011 and the outer heat-dissipating fins 7012 provides greater overall support strength for the heat-absorbing alloy ring 701, reducing its thickness and thus weight and material costs. The total number of internal heat-absorbing protrusions 7011 is less than the total number of external heat dissipation fins 7012. The horizontal width of the internal heat-absorbing protrusions 7011 is greater than the horizontal width of the external heat dissipation fins 7012. It can be assumed that the internal heat-absorbing protrusions 7011 are wider than the external heat dissipation fins 7012, and the volume of a single internal heat-absorbing protrusion 7011 is larger.

[0033] Let M be the total number of inner heat-absorbing protrusions 7011, N be the total number of outer heat-dissipating fins 7012, Sa be the surface area of ​​a single inner heat-absorbing protrusion 7011, Sc be the surface area of ​​a single outer heat-dissipating fin 7012, Sn be the total area of ​​the area on the inner ring side of the heat-absorbing alloy ring 701 that is not covered by the inner heat-absorbing protrusions 7011, and Sw be the total area of ​​the area on the outer ring side of the heat-absorbing alloy ring 701 that is not covered by the outer heat-dissipating fins 7012. Then, (N·Sc+Sw) : (M·Sa+Sn) > 1. This can be understood as follows: the thermal contact area on the outer ring side of the heat-absorbing alloy ring 701 is greater than the thermal contact area on the inner ring side of the heat-absorbing alloy ring 701. The more outer heat-dissipating fins 7012 on the outer ring side of the heat-absorbing alloy ring 701 are provided to "further" increase the external thermal contact area. For example, there are 30 inner heat-absorbing protrusions 7011 and 90 outer heat dissipation fins 7012. The inner ring side of the heat-absorbing alloy ring 701 has a thermal contact area of ​​0.25π square and the outer ring side has a thermal contact area of ​​0.4π square. In this way, the heat absorbed by the inner side of the heat-absorbing alloy ring 701 can be released to the outside through the outer side.

[0034] In addition, the mounting ring plate 7013 is located on the upper and lower sides of the heat-absorbing alloy ring 701, and the sealing rubber ring 702 is provided with an annular mounting groove 7023. The mounting ring plate 7013 of the heat-absorbing alloy ring 701 is installed in conjunction with the mounting groove 7023 of the sealing rubber ring 702. That is to say, by engaging the mounting ring plate 7013 in the mounting groove 7023, the sealing rubber ring 702 can be installed in conjunction with the heat-absorbing alloy ring 701.

[0035] Please see Figure 3 The sealing rubber ring 702 has multiple protruding rings 7021 on one end of its side surface. The radial longitudinal section of the protruding ring 7021 is spherical. A concave section 7022 is formed at the connection between the protruding ring 7021 and the sealing rubber ring 702. The concave section 7022 allows the protruding ring 7021 to deform directly to both sides when it is compressed. The main deformation is concentrated on the protruding ring 7021 and the concave section 7022, and the "body" of the sealing rubber ring 702 is minimally affected by deformation. This ensures the "static" fit between the "body" of the sealing rubber ring 702 and the heat-absorbing alloy ring 701, reducing frequent friction between the "body" of the sealing rubber ring 702 and the heat-absorbing alloy ring 701.

[0036] Please see Figure 2 , Figure 3 , Figure 4 There are two friction ring plates 8. One friction ring plate 8 is installed on the top side of the lower support plate 1, and the other friction ring plate 8 is installed on the bottom side of the upper support plate 6. Both are equipped with friction ring plates 8. The friction ring plates 8 are provided with multiple smooth ring surfaces 801 and multiple rough ring surfaces 802. The smooth ring surfaces 801 and rough ring surfaces 802 are distributed alternately.

[0037] The smooth annular surface 801 is aligned with the raised ring 7021, meaning the raised ring 7021 of the sealing rubber ring 702 directly contacts the smooth annular surface 801. Furthermore, the friction ring 8 does not necessarily have to be made of metal; it can be made of rubber. Also, the rough annular surface 802 does not necessarily have to be truly rough, as long as the static friction coefficient between the rough annular surface 802 and the raised ring 7021 is greater than that between the smooth annular surface 801 and the raised ring 7021. Let the roughness of any point K on the rough annular surface 802 be λ, and the shortest straight-line distance between point K and the smooth annular surface 801 be L. Then, the roughness λ increases with the distance L; that is, the farther the rough annular surface 802 is from the smooth annular surface 801, the greater its roughness. With this setting, when the protruding ring 7021 is subjected to compression deformation, if it deforms too much to one side, the resistance will increase, and if it continues to deform, it will deform to the opposite side, thus avoiding excessive deformation on one side of the protruding ring 7021.

[0038] Example 2: This invention relates to a method of using a multi-directional elastic support bridge bearing mechanism, comprising the following:

[0039] First, install one friction ring plate 8 on the top side of the lower support plate 1 and the other friction ring plate 8 on the bottom side of the upper support plate 6. Before installing the upper support plate 6, install the sealing assembly 7. Then install the upper support plate 6 and reinforce it from the outside. That is, after installing the friction ring plates 8 on the lower support plate 1 and the upper support plate 6, the friction ring plates 8 can be very thin rings that are directly fitted onto the lower plate limiting protrusion 101 and the upper plate limiting protrusion 601, or they can be embedded in the surface of the lower support plate 1 and the upper support plate 6. After installing the lower support plate 1, the spherical PTFE plate 2, the spherical rigid liner plate 3, and the flat PTFE plate 4, install the sealing assembly 7.

[0040] Then, during the use of the support mechanism, the protruding ring 7021 of the sealing rubber ring 702 is compressed, and the protruding ring 7021 undergoes longitudinal deformation compression and transverse deformation increment.

[0041] When the lateral deformation increment of the raised ring 7021 comes into contact with the rough ring surface of the friction ring 8, the lateral deformation "resistance" increases linearly. The "resistance" on the side of the raised ring 7021 with excessive lateral deformation increment is greater than the "resistance" on the side with less lateral deformation increment. The lateral deformation increment on both sides of the raised ring 7021 tends to be balanced, so that the degree of lateral increment of the raised ring 7021 on both sides is relatively similar. This avoids excessive compression deformation on one side, ensures sealing performance, and improves the overall service life of the sealing rubber ring 702.

[0042] In addition, during the use of the support mechanism, the spherical rigid liner plate 3 rubs against the spherical polytetrafluoroethylene plate 2 and the planar polytetrafluoroethylene plate 4, generating excessive heat in the inner space of the sealing component 7. The inner heat-absorbing protrusion 7011 of the heat-absorbing alloy ring 701 and the inner ring side of the non-inner heat-absorbing protrusion 7011 of the heat-absorbing alloy ring 701 absorb the heat generated in the inner space of the sealing component 7, while the outer heat dissipation fins 7012 of the heat-absorbing alloy ring 701 and the outer ring side of the non-outer heat dissipation fins 7012 of the heat-absorbing alloy ring 701 release heat to the outside.

[0043] The above description is merely 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 within the protection scope of the present invention.

Claims

1. A multi-directional elastic support type bridge support mechanism, the support mechanism comprising a lower support plate (1), an upper support plate (6), a spherical rigid lining plate (3) between the lower support plate (1) and the upper support plate (6), a spherical PTFE plate (2) arranged on the lower side of the spherical rigid lining plate (3), and a flat PTFE plate (4) and a stainless steel plate (5) arranged on the upper side of the spherical rigid lining plate (3), characterized in that: the support mechanism comprises a ring-shaped sealing assembly (7) between the lower support plate (1) and the upper support plate (6), and the sealing assembly (7) is located on the periphery of the spherical rigid lining plate (3); the sealing assembly (7) comprises a heat-absorbing alloy ring (701) and a sealing rubber ring (702) fitted and installed on the upper and lower sides of the heat-absorbing alloy ring (701); the heat-absorbing alloy ring (701) is uniformly provided with a plurality of inner heat-absorbing convex plates (7011) facing the spherical rigid lining plate (3) on the inner periphery; the heat-absorbing alloy ring (701) is uniformly provided with a plurality of outer heat-dissipating fins (7012) in direct contact with the external environment on the outer periphery; the total number of the inner heat-absorbing convex plates (7011) is less than the total number of the outer heat-dissipating fins (7012), and the horizontal width dimension of the plate blocks of the inner heat-absorbing convex plates (7011) is greater than the horizontal width dimension of the outer heat-dissipating fins (7012); one end side of the sealing rubber ring (702) is provided with a plurality of raised rings (7021), wherein the radial longitudinal section of the raised ring (7021) is spherical, and the raised ring (7021) and the sealing rubber ring (702) form an inner concave section (7022) at the connection position; the top side of the lower support plate (1) and the bottom side of the upper support plate (6) are both provided with friction ring pieces (8), the friction ring pieces (8) are provided with a plurality of smooth ring surfaces (801) and a plurality of rough ring surfaces (802), and the smooth ring surfaces (801) and the rough ring surfaces (802) are staggered distributed; the positions of the smooth ring surfaces (801) are aligned with the positions of the raised rings (7021); the roughness of any position point K of the rough ring surface (802) is λ, the distance between the position point K and the nearest smooth ring surface (801) is L, and the roughness λ increases with the increase of the distance L. 2.The multi-directional elastic support type bridge support mechanism according to claim 1, characterized in that: the top side of the lower support plate (1) is provided with a ring-shaped lower plate limiting convex ring (101), the bottom side of the upper support plate (6) is provided with a ring-shaped upper plate limiting convex ring (601), and the sealing assembly (7) is limitingly installed in the peripheral area of the lower plate limiting convex ring (101) and the upper plate limiting convex ring (601). 3.The multi-directional elastic support type bridge support mechanism according to claim 1, characterized in that: the heat-absorbing alloy ring (701) is provided with mounting ring plates (7013) on the upper and lower sides, the sealing rubber ring (702) is provided with a ring-shaped mounting groove (7023), and the mounting ring plates (7013) of the heat-absorbing alloy ring (701) are fitted and installed with the mounting groove (7023) of the sealing rubber ring (702). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 4. The multi-directional elastic support type bridge support mechanism according to claim 1, characterized in that: The horizontal position of the inner heat-absorbing convex plate (7011) of the heat-absorbing alloy ring (701) is matched with the horizontal position of the side surface of the spherical rigid lining plate (3).

5. The multi-directional elastic support type bridge support mechanism according to claim 1, characterized in that: The total number of the inner heat-absorbing convex plates (7011) is M, and the surface area of a single inner heat-absorbing convex plate (7011) is Sa; The total number of the outer heat-dissipating fins (7012) is N, and the surface area of a single outer heat-dissipating fin (7012) is Sc; The total area of the non-heat-absorbing convex plate (7011) region of the inner side surface of the heat-absorbing alloy ring (701) is Sn; The total area of the non-heat-dissipating fin (7012) region of the outer side surface of the heat-absorbing alloy ring (701) is Sw; Then (N·Sc+Sw): (M·Sa+Sn)>1.

6. A method of using a multi-directional resilient support bridge bearing mechanism, characterized by, The multi-directional elastic support type bridge support mechanism according to any one of claims 1 to 5, comprising the following contents: S1. First, install a friction ring piece (8) on the top side of the lower support plate (1), and install another friction ring piece (8) on the bottom side of the upper support plate (6). Before only the upper support plate (6) is not installed, install the sealing assembly (7), then install the upper support plate (6), and perform peripheral reinforcement; S2. During the use of the support mechanism, the convex ring (7021) of the sealing rubber ring (702) is extruded, the convex ring (7021) is extruded in the longitudinal direction, and the transverse deformation increment occurs; S3. When the transverse deformation increment position of the convex ring (7021) contacts the rough ring surface of the friction ring piece (8), the transverse deformation "resistance" linearly increases, the "resistance" of the side of the convex ring (7021) where the transverse deformation increment is too much is greater than the "resistance" of the side where the transverse deformation increment is less, and the transverse deformation increments of the two sides of the convex ring (7021) tend to be balanced; S4. During the use of the support mechanism, the spherical rigid lining plate (3) and the spherical polytetrafluoroethylene plate (2) and the flat polytetrafluoroethylene plate (4) produce friction, excessive heat is generated in the inner space of the sealing assembly (7), the inner heat-absorbing convex plate (7011) of the heat-absorbing alloy ring (701) and the inner ring side surface of the non-heat-absorbing convex plate (7011) of the heat-absorbing alloy ring (701) absorb the heat generated in the inner space of the sealing assembly (7), and the outer heat-dissipating fin (7012) of the heat-absorbing alloy ring (701) and the outer ring side surface of the non-heat-dissipating fin (7012) of the heat-absorbing alloy ring (701) release heat to the outside.

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