A sealing ring and a bearing using the sealing ring

Abstract

The present application discloses a sealing ring and a bearing using the sealing ring, which relates to the technical field of bearings. It includes a metal support frame and a flexible sealing body arranged on the metal support frame. The flexible sealing body includes a fixed part, a transition part and a sealing part connected in sequence. A main accommodation cavity is formed on one side of the metal support frame close to the sealing part. A deformation mechanism is arranged in the main accommodation cavity of the metal support frame. A secondary accommodation cavity is formed on one side of the sealing part close to the metal support frame. One end of the deformation mechanism far from the metal support frame extends into the secondary accommodation cavity of the sealing part, and the deformation mechanism is used to drive the sealing part to deform. In the present application, the deformation mechanism is used to drive the sealing part to deform, so as to form a gap between the sealing part and the outer ring or inner ring of the bearing. Workers can insert tools into the gap, thereby facilitating the disassembly of the sealing ring.

Description

Technical Field

[0001] This application relates to the technical field of bearings, and in particular to a sealing ring and a bearing using the sealing ring. Background Art

[0002] Contact sealing is a design that achieves a sealing effect by directly contacting an elastic sealing element with the inner and outer rings of a bearing, mainly used to prevent lubricant leakage and the intrusion of external contaminants. Its core components are usually made of flexible materials such as rubber or polyurethane, forming a lip-shaped or ring-shaped structure, closely fitting on the surface of the inner or outer ring of the bearing, and using a pre-tightening force to ensure the sealing performance under dynamic and static conditions.

[0003] Currently, the elastic sealing element of a bearing is usually a sealing ring. One side of the sealing ring closely fits in the outer or inner ring of the bearing, and the sealing lip on the other side of the sealing ring abuts against and has an interference fit with the inner or outer ring of the bearing. Contact sealing has the advantages of high sealing reliability, simple structure, low cost, and being suitable for harsh environments such as dust and humidity. However, it also has disadvantages such as temperature rise and additional energy consumption caused by contact friction, and the service life may be reduced due to wear during long-term use. This makes the replacement frequency of the sealing ring using contact sealing higher than that of non-contact sealing.

[0004] However, for the sealing ring of contact sealing, there is an interference fit between the sealing lip and the inner or outer ring of the bearing, and there is no gap between the sealing lip and the inner or outer ring of the bearing, making it difficult for tools to be inserted between the sealing ring and the inner or outer ring of the bearing, and thus difficult to disassemble the sealing ring. Summary of the Invention

[0005] In order to facilitate the disassembly of the sealing ring of a bearing, this application provides a sealing ring and a bearing using the sealing ring.

[0006] In a first aspect, a sealing ring provided by this application adopts the following technical solution:

[0007] A sealing ring includes a metal support frame and a flexible sealing body provided on the metal support frame. The flexible sealing body includes a fixed part, a transition part, and a sealing part connected in sequence. A main accommodation cavity is formed on one side of the metal support frame close to the sealing part. A deformation mechanism is arranged in the main accommodation cavity of the metal support frame. A secondary accommodation cavity is formed on the side of the sealing part close to the metal support frame. One end of the deformation mechanism away from the metal support frame extends into the secondary accommodation cavity of the sealing part, and the deformation mechanism is used to drive the sealing part to deform.

[0008] By adopting the above technical solution, the sealing ring is installed in the inner ring or outer ring of the bearing through the fixing part, and the sealing part is press-fitted onto the outer ring or inner ring of the bearing for sealing. When the sealing ring needs to be disassembled, the deformation mechanism is used to drive the sealing part to deform, so as to form a gap between the sealing part and the outer ring or inner ring of the bearing. At this time, the staff can insert a tool into the gap, thus facilitating the disassembly of the sealing ring.

[0009] Preferably, the deformation mechanism includes an elastic metal sheet that can be bent bidirectionally and maintain the bent state. The elastic metal sheet is arranged in the main accommodation cavity of the metal support frame. One end of the elastic metal sheet is fixedly connected to the metal support frame, and the end of the elastic metal sheet away from the metal support frame extends into the secondary accommodation cavity. When the sealing ring is installed in the bearing, the elastic metal sheet is in the first bent form, with the elastic metal sheet protruding towards the outside of the bearing. When the middle part of the elastic metal sheet is pressed towards the middle of the elastic metal sheet, the elastic metal sheet bends reversely into the second bent form, with the elastic metal sheet recessed towards the inside of the bearing, and the end of the elastic metal sheet away from the metal support frame drives the sealing part to deform.

[0010] By adopting the above technical solution, when the sealing ring is installed in the bearing, the elastic metal sheet is in the first bent form. At this time, the sealing part fits onto the inner ring or outer ring of the bearing. When the sealing ring needs to be disassembled, press the middle protruding position of the elastic metal sheet towards the inside of the bearing, so that the elastic metal sheet bends reversely into the second bent form. Since one end of the elastic metal sheet is fixedly connected to the metal support frame, the other end of the elastic metal sheet will move towards the outside of the bearing, thereby driving the sealing part to deform.

[0011] Preferably, the deformation mechanism includes a base elastic sheet, a circular conduction sheet, and a displacement execution sheet. One end of the base elastic sheet is fixedly connected to the metal support frame. The base elastic sheet protrudes towards the outside of the bearing. The other end of the base elastic sheet is inserted into the secondary accommodation cavity. The circular conduction sheet is arranged at one end of the base elastic sheet close to the secondary accommodation cavity, and the displacement execution sheet is arranged at the end of the circular conduction sheet away from the base elastic sheet.

[0012] By adopting the above technical solution, when the sealing ring needs to be disassembled, press the base elastic sheet. The base elastic sheet drives the circular conduction sheet to rotate in the secondary accommodation cavity. The circular conduction sheet then drives the displacement execution sheet to rotate towards the outside of the bearing. By magnifying the movement amount of the displacement execution sheet through the circular conduction sheet, the effective deformation of the sealing part is achieved.

[0013] Preferably, the deformation mechanism includes a transmission rod, a rotating shaft and a pressure conduction block. The rotating shaft is rotatably arranged in the main accommodation cavity of the metal support frame. The transmission rod is fixedly arranged on the rotating shaft. The power arm of the transmission rod is located in the main accommodation cavity, and the resistance arm of the transmission rod is located in the secondary accommodation cavity. The pressure conduction block is rotatably arranged at the end of the power arm of the transmission rod. The pressure conduction block is located on the side of the transmission rod away from the inside of the bearing, and the side wall of the pressure conduction block away from the transmission rod abuts against the transition part.

[0014] By adopting the above technical solution, when the sealing ring needs to be disassembled, the transition part is pressed. The transition part drives the pressure conduction block to move towards the inside of the bearing. The pressure conduction block drives the transmission rod to move. The transmission rod drives the rotating shaft to rotate on the metal support frame, so that the power arm of the transmission rod rotates towards the inside of the bearing, and the resistance arm of the transmission rod rotates towards the direction away from the inside of the bearing. The resistance arm of the transmission rod can drive the sealing part to deform during the rotation.

[0015] Preferably, a button protrudes from the transition part towards the side away from the metal support frame, and the end of the pressure conduction block away from the transmission rod extends into the button.

[0016] By adopting the above technical solution, the button protruding on the transition part is pressed, and the pressure conduction block is pressed through the button, so as to facilitate the pressure conduction block to drive the transmission rod to rotate.

[0017] Preferably, the ratio of the power arm to the resistance arm of the transmission rod is 1:2.

[0018] By adopting the above technical solution, when pressing the pressure conduction block to drive the transmission rod to rotate, the ratio of the moving distances of the power arm and the resistance arm of the transmission rod is 1:2, so that the resistance arm of the transmission rod can move a greater distance in the secondary accommodation cavity, thus facilitating the transmission rod to drive the sealing part to deform.

[0019] Preferably, an arc-shaped guide plate is arranged at the end of the transmission rod located in the secondary accommodation cavity, and the arc-shaped guide plate is inserted into the sealing part.

[0020] By adopting the above technical solution, when pressing the pressure conduction block to drive the transmission rod to rotate, the transmission rod will drive the arc-shaped guide plate to move in the sealing part, thus facilitating the transmission rod to drive the sealing part to deform.

[0021] Preferably, a plurality of main accommodation cavities are spaced apart on the metal support frame, a plurality of secondary accommodation cavities are opened in the sealing part, a plurality of deformation mechanisms are provided, and the plurality of deformation mechanisms correspond to the plurality of main accommodation cavities and secondary accommodation cavities one by one.

[0022] By adopting the above technical solution, a plurality of deformation mechanisms are used to drive the sealing part to deform, so as to facilitate the disassembly of the sealing ring.

[0023] In a second aspect, a bearing provided by the present application adopts the following technical solution:

[0024] A bearing includes the above-mentioned sealing ring, and also includes an inner ring, an outer ring, a cage, and a plurality of balls. The plurality of balls are rotatably arranged between the inner ring and the outer ring. The cage is arranged on the plurality of balls. A fixing groove is formed on the outer side wall of the inner ring or the inner side wall of the outer ring. The fixing part is arranged in the fixing groove, and the sealing part is in interference fit with the outer side wall of the inner ring or the inner side wall of the outer ring.

[0025] By adopting the above technical solution, when the fixing part is installed in the fixing groove of the inner ring, the sealing part is in interference fit with the inner side wall of the outer ring for sealing. When the fixing part is installed in the fixing groove of the outer ring, the sealing part is in interference fit with the outer side wall of the inner ring for sealing.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Using the elastic metal sheet, pressing the middle convex position of the elastic metal sheet towards the inside of the bearing, causing the elastic metal sheet to bend reversely into a second bending shape. Since one end of the elastic metal sheet is fixedly connected to the metal support frame, the other end of the elastic metal sheet will move towards the outside of the bearing, thereby driving the sealing part to deform.

[0028] 2. With the help of the matrix elastic sheet, circular conduction sheet, and displacement execution sheet, pressing the matrix elastic sheet, the matrix elastic sheet drives the circular conduction sheet to rotate in the secondary accommodation cavity, and the circular conduction sheet then drives the displacement execution sheet to rotate towards the outside of the bearing. By the lever effect, the movement amount of the displacement execution sheet is amplified, so as to effectively deform the sealing part.

[0029] 3. Through the transmission rod, rotating shaft, and pressure conduction block, pressing the pressure conduction block to move towards the inside of the bearing, the pressure conduction block drives the transmission rod to move, and the transmission rod drives the rotating shaft to rotate on the metal support frame, causing the power arm of the transmission rod to rotate towards the inside of the bearing and the resistance arm of the transmission rod to rotate away from the inside of the bearing. The resistance arm of the transmission rod can drive the sealing part to deform during the rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a forward explosion view of the sealing ring in Embodiment 1 of the present application;

[0031] Figure 2 It is a reverse explosion view of the sealing ring in Embodiment 1 of the present application;

[0032] Figure 3 It is a sectional view of the sealing ring in Embodiment 1 of the present application, for highlighting the sealing state of the sealing ring;

[0033] Figure 4 This is a cross-sectional view of the sealing ring in Embodiment 1 of the present application, highlighting the sealing deformation state of the sealing ring;

[0034] Figure 5 This is a cross-sectional view of the sealing ring in Embodiment 2 of the present application, highlighting the sealing state of the sealing ring;

[0035] Figure 6 This is a cross-sectional view of the sealing ring in Embodiment 2 of the present application, highlighting the sealing deformation state of the sealing ring;

[0036] Figure 7 This is a cross-sectional view of the sealing ring in Embodiment 3 of the present application, highlighting the sealing state of the sealing ring;

[0037] Figure 8 This is a cross-sectional view of the sealing ring in Embodiment 3 of the present application, highlighting the sealing deformation state of the sealing ring;

[0038] Figure 9 This is a cross-sectional view of the bearing in Embodiment 4 of the present application;

[0039] Figure 10 This is a cross-sectional view of the bearing in Embodiment 5 of the present application.

[0040] Reference numerals: 1, inner ring; 2, outer ring; 3, cage; 4, ball; 5, metal support frame; 6, flexible seal body; 61, fixing part; 62, transition part; 63, sealing part; 7, main accommodation cavity; 8, secondary accommodation cavity; 901, elastic metal sheet; 911, base elastic sheet; 912, circular conduction sheet; 913, displacement execution sheet; 921, transmission rod; 9211, power arm; 9212, resistance arm; 922, rotating shaft; 923, pressure conduction block; 10, key; 11, arc-shaped guide plate; 12, fixing groove; 13, sealing wall; 14, rotating groove. Detailed implementation manners

[0041] The following further elaborates on the present application in conjunction with the attached Figures 1 - 10 drawings.

[0042] Embodiment 1:

[0043] Embodiment 1 of the present application discloses a sealing ring.

[0044] Referring to Figure 1 , Figure 2 and Figure 3 , a sealing ring is composed of a metal support frame 5 and a flexible seal body 6. The flexible seal body 6 is installed on the outer side of the metal support frame 5, and the flexible seal body 6 is integrally made of rubber material. The flexible seal body 6 adopts a three-section connection structure of a fixing part 61, a transition part 62, and a sealing part 63. The fixing part 61, the transition part 62, and the sealing part 63 are integrally connected in sequence and installed on the metal support frame 5.

[0045] On one side of the metal support frame 5 facing the sealing portion 63, a main accommodation cavity 7 is formed. Four main accommodation cavities 7 are equidistantly arranged along the circumferential side of the metal support frame 5. On one side of the sealing portion 63 facing the metal support frame 5, a secondary accommodation cavity 8 is formed. Four secondary accommodation cavities 8 are equidistantly arranged along the circumferential direction of the sealing portion 63. The four main accommodation cavities 7 communicate with the four secondary accommodation cavities 8. A deformation mechanism is installed in each of the main accommodation cavity 7 and the secondary accommodation cavity 8, and the end of the deformation mechanism is fixedly connected to the metal support frame 5.

[0046] Specifically, the deformation mechanism adopts an elastic metal sheet 901 with the characteristics of bidirectional deformation and bending locking. The principle of its bidirectional bending and locking is the same as that of a hairpin, which will not be elaborated here. The elastic metal sheet 901 is installed in the main accommodation cavity 7 of the metal frame in a one-sided fixed connection manner, and the free end of the elastic metal sheet 901 is inserted into the secondary accommodation cavity 8 of the sealing portion 63.

[0047] Refer to Figure 3 and Figure 4 When the sealing ring is installed in the bearing, the elastic metal sheet 901 is in the first bending form. At this time, the middle part of the elastic metal sheet 901 bulges and bends away from the bearing direction, so that the sealing portion 63 remains in sealing contact with the bearing mating surface. When disassembling the sealing ring, an inward pressure is applied to the middle section of the elastic metal sheet 901, triggering the elastic metal sheet 901 to convert from the first bending form to the second bending form, so that the middle part of the elastic metal sheet 901 concaves towards the bearing direction.

[0048] During this form transformation process, the free end of the elastic metal sheet 901 located in the secondary accommodation cavity 8 generates an outward displacement, driving the sealing portion 63 to deform synchronously through the structure of the secondary accommodation cavity 8, thereby forming a gap at the surface of the sealing portion 63 and the bearing. This gap can be inserted by a tool, facilitating the disassembly of the sealing ring.

[0049] The implementation principle of an embodiment of a sealing ring in this application is as follows: In the assembled state, the fixing portion 61 is stably connected to the bearing, and the sealing portion 63 achieves a sealing effect through an interference fit with the bearing surface. When maintenance and disassembly are required, the operator can press the middle part of the elastic metal sheet 901 through the transition portion 62, causing the form of the elastic metal sheet 901 to change. During the form transformation process of the elastic metal sheet 901, the sealing portion 63 is driven to deform, thereby forming an operation gap at the sealing interface, facilitating the intervention of tools for separation operations.

[0050] Embodiment 2:

[0051] Refer to Figure 5 and Figure 6, The difference between this embodiment and Embodiment 1 is that the deformation mechanism includes a base elastic sheet 911, a circular conduction sheet 912, and a displacement execution sheet 913. The end of the base elastic sheet 911 is fixedly connected to the metal support frame 5. One end of the base elastic sheet 911 is located in the main accommodation cavity 7, and the other end is located in the secondary accommodation cavity 8. Moreover, the base elastic sheet 911 protrudes outward in an arc shape away from the bearing direction.

[0052] The circular conduction sheet 912 is fixedly connected to the end of the base elastic sheet 911 away from the metal support frame 5. A rotation groove 14 communicating with the secondary accommodation cavity 8 is provided in the sealing part 63, and the circular conduction sheet 912 is rotatably installed in the rotation groove 14.

[0053] The displacement execution sheet 913 is fixedly connected to the side of the circular conduction sheet 912 away from the base elastic sheet 911, and the displacement execution sheet 913 is located at the end of the secondary accommodation cavity 8 away from the main accommodation cavity 7. In this application, the base elastic sheet 911, the circular conduction sheet 912, and the displacement execution sheet 913 are made of metal materials. Moreover, the base elastic sheet 911 has elasticity, and the hardness of the circular conduction sheet 912 and the displacement execution sheet 913 is greater than that of the base elastic sheet 911.

[0054] The implementation principle of Embodiment 2 of this application is as follows: When the sealing ring needs to be disassembled, the middle of the base elastic sheet 911 is pressed through the transition part 62. The elastic base sheet gradually changes from an arc shape to a straight shape. During the deformation process of the elastic base sheet, the circular conduction sheet 912 is driven to rotate in the rotation groove 14, and the circular conduction sheet 912 then drives the displacement execution sheet 913 to rotate in the secondary accommodation cavity 8. The movement amount of the end of the displacement execution sheet 913 away from the circular conduction sheet 912 is amplified by the circular conduction sheet 912, thereby realizing the effective deformation of the sealing part 63.

[0055] Embodiment 3:

[0056] Referring to Figure 7 and Figure 8 , The difference between this embodiment and Embodiment 1 is that the deformation mechanism includes a transmission rod 921, a rotating shaft 922, and a pressure conduction block 923. The rotating shaft 922 is fixedly installed in the transmission rod 921 along the direction perpendicular to the transmission rod 921. The two ends of the rotating shaft 922 are respectively rotatably installed in the opposite side walls of the support frame located in the main accommodation cavity 7. The power arm 9211 of the transmission rod 921 is located in the main accommodation cavity 7, and the resistance arm 9212 of the transmission rod 921 extends from the main accommodation cavity 7 to the secondary accommodation cavity 8, and the ratio of the power arm 9211 to the resistance arm 9212 is 1:2. The pressure conduction block 923 is rotatably installed at the end of the power arm 9211 of the transmission rod 921. The pressure conduction block 923 is located on the side wall of the transmission rod 921 close to the transition part 62, and the pressure conduction block 923 slides in the transition part 62.

[0057] When the sealing ring needs to be disassembled, the pressure conduction block 923 is pressed through the transition part 62. The transition part 62 drives the pressure conduction block 923 to move towards the inside of the bearing. The pressure conduction block 923 drives the movement of the transmission rod 921. The transmission rod 921 drives the rotation shaft 922 to rotate on the metal support frame 5, so that the power arm 9211 of the transmission rod 921 rotates towards the inside of the bearing, and the resistance arm 9212 of the transmission rod 921 rotates away from the inside of the bearing. The ratio of the power arm 9211 to the resistance arm 9212 is 1:2, so that the resistance arm 9212 of the transmission rod 921 can move a greater distance in the secondary accommodation cavity 8. During the rotation process, the resistance arm 9212 of the transmission rod 921 drives the sealing part 63 to deform again.

[0058] A button 10 protrudes outward from the side of the transition part 62 away from the metal support frame 5. The end of the pressure conduction block 923 is hemispherical. The end of the pressure conduction block 923 extends into the button 10 and fits with the transition part 62. Press the protruding button 10 on the transition part 62, and press the pressure conduction block 923 through the button 10, so as to facilitate the pressure conduction block 923 to drive the transmission rod 921 to rotate.

[0059] An arc-shaped guide plate 11 is fixedly installed at the end of the resistance arm 9212 of the transmission rod 921. The arc-shaped guide plate 11 passes through the secondary accommodation cavity 8 and is inserted into the sealing part 63. When pressing the pressure conduction block 923 to drive the transmission rod 921 to rotate, the transmission rod 921 will drive the arc-shaped guide plate 11 to move in the sealing part 63, so as to facilitate the transmission rod 921 to drive the sealing part 63 to deform.

[0060] The implementation principle of Embodiment 3 of this application is: when the sealing ring needs to be disassembled, the pressure conduction block 923 is pressed through the transition part 62. The transition part 62 drives the pressure conduction block 923 to move towards the inside of the bearing. The pressure conduction block 923 drives the movement of the transmission rod 921. The transmission rod 921 drives the rotation shaft 922 to rotate on the metal support frame 5, so that the power arm 9211 of the transmission rod 921 rotates towards the inside of the bearing, and the resistance arm 9212 of the transmission rod 921 rotates away from the inside of the bearing. During the rotation process, the resistance arm 9212 of the transmission rod 921 drives the sealing part 63 to deform again.

[0061] Embodiment 4:

[0062] Embodiment of this application discloses a bearing.

[0063] Referring to Figure 9 , a bearing includes two such sealing rings as described above, and also includes an inner ring 1, an outer ring 2, a cage 3 and a plurality of balls 4. The inner ring 1 is installed inside the outer ring 2. Raceways are formed in the middle of the outer side wall of the inner ring 1 and the inner side wall of the outer ring 2. A plurality of balls 4 are rotatably installed in the raceways of the inner ring 1 and the outer ring 2. The cage 3 is installed on the plurality of balls 4.

[0064] On the inner side wall of the outer ring 2, two fixing grooves 12 are axially formed along its own axis. The fixing parts 61 of the two sealing rings are clamped in the two fixing grooves 12, so as to install the two sealing rings on the outer ring 2 of the bearing. On the outer side wall of the inner ring 1, sealing walls 13 are formed by outward expansion at both ends along the axis direction of the inner ring 1. The sealing parts 63 of the two sealing rings are in interference fit with the two sealing walls 13 of the inner ring 1, so as to seal the inside of the bearing.

[0065] The implementation principle of Embodiment 4 is as follows: When disassembling the sealing ring, the deformation mechanism is used to drive the sealing part 63 of the sealing ring to deform away from the inside of the bearing, so that a gap is formed between the sealing ring and the sealing wall 13 of the inner ring 1 of the bearing. The staff can insert a tool into the gap to disassemble the sealing ring.

[0066] Embodiment 5:

[0067] Refer to Figure 10 In this embodiment, the difference from Embodiment 4 is that the two fixing grooves 12 are symmetrically arranged at both ends of the outer side wall of the inner ring 1 along the axis of the inner ring 1. The fixing parts 61 of the two sealing rings are clamped in the fixing grooves 12 of the two inner rings 1, so as to install the two sealing rings on the inner ring 1 of the bearing. The two sealing walls 13 are formed at both ends of the inner side wall axis direction of the outer ring 2. The sealing parts 63 of the two sealing rings are in interference fit with the two sealing walls 13 of the outer ring 2, so as to seal the inside of the bearing.

[0068] The implementation principle of Embodiment 5 of this application is as follows: When disassembling the sealing ring, the deformation mechanism is used to drive the sealing part 63 of the sealing ring to deform away from the inside of the bearing, so that a gap is formed between the sealing ring and the sealing wall 13 of the outer ring 2 of the bearing. The staff can insert a tool into the gap to disassemble the sealing ring.

[0069] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A sealing ring, characterized in that: It comprises a metal support frame (5) and a flexible sealing body (6) arranged on the metal support frame (5), wherein the flexible sealing body (6) comprises a fixing portion (61), a transition portion (62) and a sealing portion (63) connected in sequence, a main accommodating cavity (7) is formed on a side of the metal support frame (5) close to the sealing portion (63), a deformation mechanism is arranged in the main accommodating cavity (7) of the metal support frame (5), a secondary accommodating cavity (8) is formed on a side of the sealing portion (63) close to the metal support frame (5), an end of the deformation mechanism away from the metal support frame (5) extends into the secondary accommodating cavity (8) of the sealing portion (63), and the deformation mechanism is used to drive the sealing portion (63) to deform; The deformation mechanism comprises a transmission rod (921), a rotating shaft (922) and a pressure transmission block (923); the rotating shaft (922) is rotatably arranged in a main accommodating chamber (7) of a metal support frame (5); the transmission rod (921) is fixedly arranged on the rotating shaft (922); the power arm (9211) of the transmission rod (921) is located in the main accommodating chamber (7); the resistance arm (9212) of the transmission rod (921) is located in the secondary accommodating chamber (8); the pressure transmission block (923) is rotatably arranged at the end of the power arm (9211) of the transmission rod (921); the pressure transmission block (923) is located on a side of the transmission rod (921) away from the inside of the bearing; and the side wall of the pressure transmission block (923) away from the transmission rod (921) abuts against the transition portion (62).

2. A sealing ring according to claim 1, characterized in that: The deformation mechanism comprises an elastic metal sheet (901) that can be bent in both directions and maintain a bent state, the elastic metal sheet (901) being arranged in a main accommodating cavity (7) of a metal support frame (5), one end of the elastic metal sheet (901) being fixedly connected to the metal support frame (5), and the end of the elastic metal sheet (901) away from the metal support frame (5) extending into the secondary accommodating cavity (8); when the sealing ring is installed in the bearing, the elastic metal sheet (901) is in a first bending state, and the elastic metal sheet (901) protrudes toward the outside of the bearing; when the elastic metal sheet (901) is pressed toward the middle of the elastic metal sheet (901), the elastic metal sheet (901) is bent in the opposite direction into a second bending state, and the elastic metal sheet (901) is recessed toward the inside of the bearing, and the end of the elastic metal sheet (901) away from the metal support frame (5) drives the sealing part (63) to deform.

3. A sealing ring according to claim 1, characterized in that: The deformation mechanism comprises a base elastic sheet (911), a circular conductive sheet (912) and a displacement actuating sheet (913); one end of the base elastic sheet (911) is fixedly connected to the metal support frame (5); the base elastic sheet (911) protrudes toward the outside of the bearing; the other end of the base elastic sheet (911) is inserted into the auxiliary accommodating cavity (8); the circular conductive sheet (912) is arranged at one end of the base elastic sheet (911) close to the auxiliary accommodating cavity (8); and the displacement actuating sheet (913) is arranged at one end of the circular conductive sheet (912) away from the base elastic sheet (911).

4. A sealing ring according to claim 1, characterized in that: The transition portion (62) is protruded toward a side away from the metal support frame (5) to form a button (10), and the end of the pressure transmission block (923) away from the transmission rod (921) extends into the button (10).

5. A sealing ring according to claim 1, characterized in that: The ratio of the power arm (9211) to the resistance arm (9212) of the transmission rod (921) is 1:

2.

6. A sealing ring according to claim 1, characterized in that: An arc-shaped guide plate (11) is provided at the end of the transmission rod (921) located in the auxiliary accommodation chamber (8), and the arc-shaped guide plate (11) is inserted into the sealing portion (63).

7. A sealing ring according to any one of claims 1 to 3, characterized in that: A plurality of the main accommodating chambers (7) are spaced apart on the metal support frame (5), a plurality of the auxiliary accommodating chambers (8) are opened in the sealing portion (63), a plurality of the deformation mechanisms are provided, and the plurality of the deformation mechanisms correspond one-to-one to the plurality of main accommodating chambers (7) and auxiliary accommodating chambers (8).

8. A bearing, characterized in that: A sealing ring comprising any one of claims 1 to 7, further comprising an inner ring (1), an outer ring (2), a retaining frame (3) and a plurality of balls (4), wherein the plurality of balls (4) are rollingly arranged between the inner ring (1) and the outer ring (2), the retaining frame (3) is arranged on the plurality of balls (4), a fixing groove (12) is provided on the outer wall of the inner ring (1) or the inner wall of the outer ring (2), the fixing portion (61) is arranged in the fixing groove (12), and the sealing portion (63) is interference fit with the outer wall of the inner ring (1) or the inner wall of the outer ring (2).

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