Dustproof assembly for bearing

Abstract

The invention relates to the technical field of bearings, in particular to a dustproof assembly for a bearing, which comprises a first outer ring assembly and a second outer ring assembly, and a connecting ring is arranged outside the first outer ring assembly and the second outer ring assembly. A sealing storage space is provided for lubricating oil between the inner ring and the outer ring, a sealing labyrinth structure is formed between the second backflow sealing meshing ring and the first backflow sealing meshing ring in a meshing mode, and the sealing baffle rings play an auxiliary sealing role on the two sides of the inner ring, so that dust and impurities are prevented from entering from the two sides of the inner ring; by optimizing a lubricating oil channel between the sealing oil groove and the inner ring, external pollutants can be prevented from entering, lubricating oil can form high pressure through oil sealing gaps between the annular sealing strips and the first outer ring assembly and the second outer ring assembly by means of rotating centrifugal force, the sealing dustproof effect is enhanced, and the service life of the bearing is prolonged. And the lubricating oil can be continuously supplied to key parts under high pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, and in particular relates to a dustproof component for a bearing. Background Art

[0002] Ball bearings are the most widely used type of bearings. Currently, bearing lubrication on the market is mainly carried out by lubricating ball bearings with grease or oil. When the lubricating oil or grease evaporates, dust, dirt and other tiny particles enter the bearing, which will cause increased wear, lubrication failure, and even cause the bearing to get stuck or damaged, thereby affecting the service life of the bearing. Bearings need to work under different working conditions, and a dust cover is provided between the outer ring and the inner ring of the bearing. The main function of the dust cover is to prevent external dust or impurities from entering the raceway, thereby causing wear on the raceway or rolling elements. However, for ball bearings with dust covers, the dust cover needs to be removed when adding lubricating oil or grease, which is more troublesome during the disassembly process.

[0003] The existing Chinese patent document with publication number CN112431849B proposes a dustproof ball bearing with a lubrication assembly. The dustproof part of the dustproof oil filling assembly can be used to prevent dust from entering the bearing. The oil storage part connected to the dustproof part can be used to store oil and also support the dustproof part. The movement of the piston is used to promote the movement and sealing of the lubricating oil. However, when the inner ring rotates at high speed, due to the centrifugal force, the pressure distribution inside and outside the inner ring will change, which may cause leakage of the lubricating oil or entry of bubbles, affecting the lubrication effect.

[0004] Therefore, the present invention proposes a dustproof component for a bearing to solve the problem in the prior art that when the inner ring rotates at high speed, the pressure distribution inside and outside the inner ring will change due to the centrifugal force, which may cause lubricating oil leakage or air bubbles to enter and affect the sealing. The present invention adopts an improved design of the lubricating oil channel and utilizes the principle that the balls and retaining frame of the inner ring will be subjected to greater centrifugal force to cause the lubricating oil to move outward under the action of centrifugal force, thereby generating a certain pressure on the outside to fill the oil sealing gap of the lubricating oil channel to form a sealed barrier interval, thereby improving the sealing and dustproof effect of the bearing. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a dustproof assembly for a bearing to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dustproof component for a bearing, comprising an outer ring component one and an outer ring component two, the outer sides of the outer ring component one and the outer ring component two are provided with connecting rings, the side surface of the outer ring component one is clamped with the side surface of the outer ring component two, the outer side surfaces of the outer ring component one and the outer ring component two are provided with assembly grooves matched with the connecting rings, the inner sides of the outer ring component one and the outer ring component two are provided with sealing oil grooves, the inner sides of the sealing oil grooves are provided with inner rings, sealing retaining rings are symmetrically provided on both sides of the inner rings, the inner sides of the outer ring component one and the outer ring component two are provided with integrated retaining frames, and the inner sides of the side walls of the outer ring component one and the outer ring component two are provided with C-type centralizing rings.

[0007] Preferably, a lubricating oil injection pipe is symmetrically fixedly installed on the inner wall of the sealing oil groove, a sealing plug is provided at one end of the lubricating oil injection pipe, the inner walls of the outer ring component one and the outer ring component two are provided with mounting grooves adapted to the lubricating oil injection pipe, and a sealing block adapted to the mounting groove is fixedly installed on the inner surface of the connecting ring.

[0008] Preferably, a return seal bite ring 2 is fixedly installed on the inner surface of the sealing oil groove, and a return seal bite ring 1 that matches the return seal bite ring 2 is symmetrically fixedly installed on the outer surface of the inner ring, and an oil return gap is provided between the return seal bite ring 1 and the return seal bite ring 2.

[0009] Preferably, the inner ring is symmetrically provided with herringbone lubricating oil channels, and four groups of herringbone lubricating oil channels are provided. The outer surface of the inner ring is provided with an inner groove, and the middle of the inner groove is provided with an oil inlet corresponding to the position of the herringbone lubricating oil channel, and the outer side of the inner surface of the oil inlet is symmetrically fixedly installed with a guide ramp, and the inner surface of the guide ramp is fixedly installed with a spring column.

[0010] Preferably, a triangular sealing piston is slidably installed inside the herringbone lubrication oil channel, and the triangular sealing piston is composed of a triangular sealing gasket and a triangular sliding plate. The outer surface of the inner ring is provided with a groove adapted to the triangular sealing gasket. The triangular sliding plate is slidably installed inside the oil inlet, and an oil inlet hole is opened on the surface of the triangular sliding plate. One end of the spring column is fixedly connected to the side surface of the triangular sliding plate.

[0011] Preferably, a first lubrication cavity is provided between the inner side of the inner ring and the inner sides of the outer ring component one and the outer ring component two, a second lubrication oil cavity is provided between the outer side of the inner ring and the inner side of the sealing oil groove, an annular sealing strip is symmetrically fixedly installed on the inner side of the inner ring, a matching groove matching the annular sealing strip is provided on the inner sides of the outer ring component one and the outer ring component two, and oil overflow grooves are provided on both sides of the inner ring close to the sealing retaining ring.

[0012] Preferably, an oil sealing gap is provided between the annular sealing strip and the grooves of the outer ring component one and the outer ring component two, a snap-fitting strip matched with the oil overflow groove is provided on the inner side of the sealing retaining ring, an oil sealing gap is provided between the snap-fitting strip and the oil overflow groove, a sealing cavity is provided on the inner surface of the sealing retaining ring, an oil inlet gap is provided on the side of the sealing cavity close to the oil sealing gap, a sealing membrane ring is fixedly installed inside the sealing cavity, an elastic ring is provided between the middle part of the surface of one side of the sealing membrane ring and the surface of the sealing cavity, and an auxiliary extrusion sealing ring is symmetrically fixedly installed on the lower surface of the other side of the sealing membrane ring.

[0013] Preferably, the side walls of the outer ring component 1 and the outer ring component 2 are provided with mounting engaging grooves adapted to the C-shaped concentrating ring, and a dust collecting groove is provided inside the C-shaped concentrating ring.

[0014] Preferably, the side walls of the integrated retaining frame are evenly distributed with ball limiting rings, balls are movably installed inside the ball limiting rings, and the side surfaces of the outer ring component 1, the outer ring component 2 and the inner ring are all provided with slide rails compatible with the balls.

[0015] Preferably, a support stabilization ring is provided on the inner side of the integrated retaining frame, the inner surface of the support stabilization ring is fixedly connected to the inner surfaces of outer ring component one and outer ring component two, the integrated retaining frame is snap-fitted and installed on the outer side of the support stabilization ring, and the outer surfaces of the support stabilization ring and the integrated retaining frame are evenly provided with guide grooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A sealed storage space for the lubricating oil is provided between the inner and outer rings through the inner ring, the C-type concentrating ring, the sealing oil groove and the integrated retaining frame. A sealed maze structure is formed between the reflux sealing bite ring 2 and the reflux sealing bite ring 1. The sealing retaining ring forms an auxiliary sealing effect on both sides of the inner ring to prevent dust and impurities from entering from both sides of the inner ring. By optimizing the lubricating oil channel between the sealing oil groove and the inner ring, not only can external pollutants be prevented from entering, but also the rotating centrifugal force can be used to form a higher pressure for the lubricating oil through the oil sealing gap between the annular sealing strip and the outer ring component 1 and the outer ring component 2, which not only enhances the sealing and dustproof effect, but also enables the lubricating oil to be continuously supplied to key parts under high pressure, thereby improving the lubrication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0020] Figure 3 For the present invention Figure 2A schematic diagram of the enlarged structure at point A;

[0021] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at B;

[0022] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at C;

[0023] Figure 6 For the present invention Figure 3 A schematic diagram of the structure at D of FIG.

[0024] Figure 7 It is a schematic diagram of the disassembly structure of the sealing retaining ring and the C-type centralizing ring of the present invention;

[0025] Figure 8 It is a schematic diagram of the overall disassembly structure of the present invention;

[0026] Fig. 9 It is a schematic diagram of the cross-sectional structure of the sealing retaining ring of the present invention;

[0027] Fig.10 It is a schematic diagram of the structure of one side of the outer ring component 2 of the present invention;

[0028] Fig.11 It is a schematic diagram of the structure of one side of the outer ring assembly of the present invention;

[0029] Fig.12 It is a schematic diagram of the overall structure of the integrated cage of the present invention;

[0030] Fig.13 It is a schematic diagram of the structure of the integrated retainer after being disassembled according to the present invention;

[0031] Fig.14 It is a schematic diagram of the overall structure of the inner ring of the present invention;

[0032] Fig.15 It is a schematic diagram of the cross-sectional structure of the inner ring of the present invention;

[0033] Fig.16 For the present invention Fig.15 Enlarged structural diagram at E.

[0034] In the figure: 1. Outer ring assembly 1; 2. Outer ring assembly 2; 3. Connecting ring; 4. Inner ring; 41. Backflow sealing bite ring 1; 42. Herringbone lubricating oil channel; 421. Oil inlet; 4211. Guide ramp; 4212. Spring column; 422. Triangular sealing piston; 4221. Oil inlet hole; 43. First lubrication chamber; 44. Second lubrication chamber; 45. Annular sealing strip; 46. Oil overflow groove; 5. Sealing retaining ring; 51. Clamping strip; 52. Sealing membrane ring; 521. Elastic ring; 522. Auxiliary extrusion sealing ring; 6. C-type concentrating ring; 61. Dust collecting groove; 7. Sealing oil groove; 71. Backflow sealing bite ring 2; 72. Lubricating oil injection pipe; 8. Integrated retaining frame; 81. Ball limit ring; 82. Guide groove; 83. Support stabilizing ring; 84. Ball. DETAILED DESCRIPTION

[0035] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] For example, see Figures 1 to 16The present invention provides a technical solution: a dustproof component for a bearing, comprising an outer ring component 1 and an outer ring component 2, the outer ring component 1 and the outer ring component 2 are provided with a connecting ring 3 on their exteriors, the side surface of the outer ring component 1 is clamped with the side surface of the outer ring component 2, the outer surface of the outer ring component 1 and the outer ring component 2 are both provided with an assembly groove adapted to the connecting ring 3, the inner parts of the outer ring component 1 and the outer ring component 2 are provided with a sealing oil groove 7, the inner parts of the sealing oil groove 7 are provided with an inner ring 4, the inner ring 4 is symmetrically provided with sealing retaining rings 5 ​​on both sides, the inner sides of the outer ring component 1 and the outer ring component 2 are both provided with an integrated retaining frame 8, the outer ring component 1 The side walls of the outer ring assembly 1 and the outer ring assembly 2 are both provided with a C-shaped centralizing ring 6, the inner wall of the sealing oil groove 7 is symmetrically fixedly installed with a lubricating oil injection pipe 72, and one end of the lubricating oil injection pipe 72 is provided with a sealing plug, the inner walls of the outer ring assembly 1 and the outer ring assembly 2 are provided with a mounting groove adapted to the lubricating oil injection pipe 72, the inner surface of the connecting ring 3 is fixedly installed with a sealing block adapted to the mounting groove, the inner surface of the sealing oil groove 7 is fixedly installed with a reflux sealing bite ring 2 71, and the outer surface of the inner ring 4 is symmetrically fixedly installed with a reflux sealing bite ring 1 41 adapted to the reflux sealing bite ring 2 71, and the reflux sealing bite ring 1 41 and the reflux sealing bite ring There is an oil return gap between the two 71; in this embodiment, the outer ring component 1 and the outer ring component 2 form a complete outer ring structure after assembly. The sealing oil groove 7 inside not only strengthens the connection between the outer ring component 1 and the inner part of the outer ring component 2, but also limits the inner ring 4 through the return seal bite ring 2 71, so that the inner ring 4 is rotatably installed inside the outer ring component 1 and the outer ring component 2, and at the same time provides a sealed storage space for the lubricating oil, and the lubricating oil can be injected into the inside through the lubricating oil injection pipe 72. The connecting ring 3 mainly performs a sealing and fixing function on the outside of the outer ring component 1 and the outer ring component 2, so that the outer ring component 1 and the outer ring component 2 are assembled. After matching, a complete sealing whole is formed. A sealing maze structure is formed between the reflux sealing bite ring 2 71 and the reflux sealing bite ring 1 41. The sealing retaining ring 5 forms an auxiliary sealing effect on both sides of the inner ring 4 to prevent dust and impurities from entering from both sides of the inner ring 4. By optimizing the lubricating oil channel between the sealing oil groove 7 and the inner ring 4, not only can external pollutants be prevented from entering, but also the rotating centrifugal force can be used to form a higher pressure through the oil sealing gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2 2, which not only enhances the sealing effect, but also enables the lubricating oil to be continuously supplied to key parts under high pressure, thereby improving the lubrication efficiency.

[0037] For example 2, please refer to Figures 1 to 16On the basis of the first embodiment, the present embodiment further proposes that the inner ring 4 is symmetrically provided with herringbone lubricating oil passages 42, four groups of herringbone lubricating oil passages 42 are provided, the outer surface of the inner ring 4 is provided with an inner groove, the middle part of the inner groove is provided with an oil inlet 421 corresponding to the position of the herringbone lubricating oil passage 42, the outer side of the inner surface of the oil inlet 421 is symmetrically fixedly installed with a guide ramp 4211, the inner surface of the guide ramp 4211 is fixedly installed with a spring column 4212, the inner side surface of the guide ramp 4211 is slidably installed with a triangular sealing piston 422, the triangular sealing piston 422 is composed of a triangular sealing gasket and a triangular sliding plate, the outer surface of the inner ring 4 is provided with a card groove adapted to the triangular sealing gasket, and the triangular sliding plate is slidably installed inside the oil inlet 421 An oil inlet hole 4221 is provided on the surface of the triangular sliding plate, one end of the spring column 4212 is fixedly connected to the side surface of the triangular sliding plate, a first lubrication cavity 43 is provided between the inner side of the inner ring 4 and the inner sides of the outer ring component 1 and the outer ring component 2, a second lubrication cavity 44 is provided between the outer side of the inner ring 4 and the inner side of the sealing oil groove 7, an annular sealing strip 45 is symmetrically fixedly installed on the inner side of the inner ring 4, a matching groove matching the annular sealing strip 45 is provided on the inner sides of the outer ring component 1 and the outer ring component 2, and overflow grooves 46 are provided on both sides of the inner ring 4 near the sealing retaining ring 5; in this embodiment, the lubricating oil enters from the lubricating oil injection pipe 72, and is first stored in the second lubricating oil cavity 44 between the inner ring 4 and the sealing oil groove 7, and when the inner ring 4 rotates at a high speed The triangular sealing piston 422 inside the oil inlet 421 is rotated and pushed out due to centrifugal force. At this time, the lubricating oil enters the oil inlet 421 through the oil inlet holes 4221 on both sides of the triangular sealing piston 422. The inner inclined design of the guide ramp 4211 not only guides the lubricating oil, but also allows the lubricating oil to enter the first lubricating cavity 43 formed on both sides of the inner ring 4 and the outer ring component 1 and the outer ring component 2 through the herringbone lubricating oil channel 42. In addition, the spring column 4212 on the inner side of the guide ramp 4211 elastically compresses the triangular sealing piston 422. When the inner ring 4 does not rotate, the triangular sealing piston 422 is pulled to re-close the oil inlet 421 to keep the internal lubricating oil in a pressure-sealed state. When the inner ring 4 rotates, the lubricating oil passes through the oil inlet 42 1. When the herringbone lubricating oil passage 42 enters the first lubricating chamber 43, the high-speed rotation of the inner ring 4 causes the lubricating oil to move from the inside of the first lubricating chamber 43 to the outside. Most of the lubricating oil will move from the bevel groove formed by the outer ring component 1, the outer ring component 2 and the first lubricating chamber 43 to lubricate the integrated retainer 8. At the same time, due to the effect of pressure, the excess lubricating oil will flow back to the sealing oil groove 7 through the oil return gap between the reflux sealing bite ring 2 71 and the reflux sealing bite ring 1 41. A part of the lubricating oil will pass through the oil sealing gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2 to form a sealing oil section. Through the lubricating oil passage composed of the herringbone lubricating oil passage 42, the first lubricating chamber 43 and the second lubricating oil chamber 44,It not only ensures that the lubricating oil can still effectively cover all friction surfaces under high-speed operation conditions, but also ensures that the lubricating oil can smoothly enter the first lubricating cavity 43, that is, the gap between the inner ring and the outer ring, through the herringbone lubricating oil channel 42, so as to achieve a uniform lubrication effect, and the lubricating oil can be evenly and continuously distributed on all moving parts, significantly reducing the direct contact between the metal surfaces, reducing friction and wear, thereby extending the overall service life of the bearing, and even in some cases, even if there is slight aging or wear of the seal, the pressure difference can be adjusted by the movement of the lubricating oil to maintain basic sealing performance, thereby enhancing the overall reliability of the sealing system, and most of the lubricating oil is guided by the bevel groove of the first lubricating cavity 43 to move from the bevel groove formed by the outer ring component 1, the outer ring component 2 and the first lubricating cavity 43 to lubricate the integrated retaining frame 8, making full use of the centrifugal force to ensure that the lubricating oil can accurately reach The area that needs lubrication, while reducing unnecessary accumulation, the spring column 4212 on the inner side of the guide ramp 4211 applies elastic pressure to the triangular sealing piston 422. When the inner ring does not rotate, the triangular sealing piston 422 can be pulled to re-close the oil inlet 421, keeping the internal lubricating oil in a pressure-sealed state, ensuring that the lubricating oil will not leak even in the shutdown state, while preventing external pollutants from entering. Through the improved design of the lubricating oil channel, another part of the lubricating oil forms a higher pressure through the oil sealing gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2 2, which not only enhances the sealing effect, but also ensures that the lubricating oil can be continuously supplied to the key parts under high pressure, improving the lubrication efficiency, and the excess lubricating oil flows back to the inside of the oil storage chamber sealing oil tank 7 through the return oil gap between the return seal bite ring 2 71 and the return seal bite ring 1 41, avoiding the waste of lubricating oil.

[0038] For example 3, please refer to Figures 1 to 16On the basis of the second embodiment, the present embodiment further proposes that an oil sealing gap is provided between the annular sealing strip 45 and the grooves of the outer ring component 1 and the outer ring component 2, a snap-fit ​​strip 51 matched with the oil overflow groove 46 is provided on the inner side of the sealing retaining ring 5, an oil sealing gap is provided between the snap-fit ​​strip 51 and the oil overflow groove 46, a sealing cavity is provided on the inner surface of the sealing retaining ring 5, an oil inlet gap is provided on the side of the sealing cavity close to the oil sealing gap, a sealing membrane ring 52 is fixedly installed inside the sealing cavity, an elastic ring 521 is provided between the middle part of one side surface of the sealing membrane ring 52 and the surface of the sealing cavity, and an auxiliary extrusion sealing ring 522 is symmetrically fixedly installed on the lower surface of the other side of the sealing membrane ring 52; in the present embodiment, under the high-speed rotation of the inner ring 4, a part of the lubricating oil will pass through the oil sealing gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2, and when the pressure reaches a balance to form a sealing oil section Before the lubricating oil is applied, it will enter the oil sealing gap between the snap-fit ​​strip 51 and the oil overflow groove 46 through the gap between the annular sealing strip 45 and the outer ring component 1, the outer ring component 2, and enter the sealing cavity of the sealing retaining ring 5 through the oil inlet gap, thereby forming pressure on the sealing film ring 52 inside, causing the sealing film ring 52 to deform so that the auxiliary extrusion sealing ring 522 and the sealing film ring 52 are in close contact with the shaft surface, thereby increasing the sealing performance on both sides of the inner ring 4 until the lubricating oil reaches pressure balance. At this time, the oil sealing gap between the annular sealing strip 45 and the outer ring component 1, the outer ring component 2, and the oil sealing gap between the snap-fit ​​strip 51 and the oil overflow groove 46 are all blocked by the lubricating oil, and the elastic ring 521 inside the sealing film ring 52 can pull the sealing film ring 52 to recover a little when the pressure becomes smaller, thereby ensuring that the lubricating oil maintains pressure in the oil sealing gap as much as possible, ensuring sealing performance, effectively preventing dust from entering, and increasing the dustproof effect of the bearing.

[0039] Example 4, please refer to Figures 1 to 16On the basis of the third embodiment, the present embodiment further proposes that the side walls of the outer ring assembly 1 and the outer ring assembly 2 are provided with mounting engaging grooves adapted to the C-type concentration ring 6, the interior of the C-type concentration ring 6 is provided with a dust collecting groove 61, the side walls of the integrated retaining frame 8 are evenly distributed with ball limiting rings 81, the interior of the ball limiting ring 81 is movably provided with balls 84, the side surfaces of the outer ring assembly 1, the outer ring assembly 2, and the inner ring 4 are all provided with slide rails adapted to the balls 84, the inner side of the integrated retaining frame 8 is provided with a support stabilizing ring 83, and the inner side surface of the support stabilizing ring 83 is aligned with the outer ring assembly 1 1. The inner surface of the outer ring assembly 2 is fixedly connected, and the integrated cage 8 is snap-fitted and installed on the outer side of the support stabilizing ring 83. The outer surfaces of the support stabilizing ring 83 and the integrated cage 8 are evenly provided with guide grooves 82. In this embodiment, the integrated cage 8 and the ball limiting ring 81 form a cage, which not only ensures the uniform distribution of the balls 84 and disperses the pressure, but also ensures that the rolling body can run smoothly during the rotation process and reduces the risk of wear. At the same time, the support stabilizing ring 83 plays a role in fixing and supporting the integrated cage 8, increasing the stability of the integrated cage 8, and preventing it from rotating at high speed. The integral retainer 8 is provided with a guide groove 82 which is inclined to help the lubricating oil to pass through the integral retainer 8 and enter the inner side of the C-type concentration ring 6 and the return seal bite ring 2 71 and the return seal bite ring 1 41 for reflux. At the same time, the arc-shaped groove dust collecting groove 61 inside the C-type concentration ring 6 can also concentrate the impurities carried inside under the action of pressure when the lubricating oil passes through. The C-type concentration ring 6 can be removed later to concentrate the impurities. By optimizing the structure of the integral retainer 8 Combined with the lubricating oil flow path, the inclined distributed open guide grooves 82 opened on the outside of the integrated retaining frame 8 not only help the lubricating oil to pass over the retaining frame and enter the C-type concentrating ring 6 in the inner area, but also promote the reflux of the lubricating oil through the reflux sealing bite ring 2 71 and the reflux sealing bite ring 1 41. The arc-shaped groove dust collecting groove 61 inside the C-type concentrating ring 6 can block and concentrate the impurities carried inside under the action of pressure when the lubricating oil passes through, effectively reducing the impact of impurities on rolling elements and other key components, extending the service life of the bearing, and facilitating subsequent cleaning and maintenance.

[0040] For example 5, please refer to Figures 1 to 16On the basis of the fourth embodiment, this embodiment further proposes a dustproof use method for a dustproof assembly for a bearing, comprising the following steps: Step 1, storing lubricating oil, removing the fixing bolts of the connecting ring 3, stripping the connecting ring 3 and pulling out the sealing plug of the lubricating oil injection pipe 72, injecting the lubricating oil from the lubricating oil injection pipe 72, storing the lubricating oil in the second lubricating oil chamber 44 between the inner ring 4 and the sealing oil groove 7, and then re-sealing and fixing the connecting ring 3; Step 2, when the inner ring 4 rotates at a high speed, the lubricating oil passes through the triangular sealing piston 422 The oil inlet holes 4221 on both sides enter the oil inlet port 421, and enter the first lubrication chamber 43 through the herringbone lubrication oil channel 42, so as to fully lubricate the outer ring component 1, the outer ring component 2, the inner ring 4 and the integrated retainer 8. The inner ring 4 rotates at a high speed to move the lubricating oil from the inside of the first lubrication chamber 43 to the outside. Most of the lubricating oil will move from the bevel groove formed by the outer ring component 1, the outer ring component 2 and the first lubrication chamber 43. The excess lubricating oil will pass through the reflux seal bite ring 2 71 and the reflux seal bite ring 1. The oil return gap between the inner ring 41 flows back into the sealing oil groove 7, and a part of the lubricating oil will pass through the oil sealing gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2 to form a sealing oil section, which plays a role in dust prevention; Step three, under the action of the high-speed rotation of the inner ring 4, a part of the lubricating oil will pass through the oil sealing gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2. Before the pressure reaches equilibrium to form the sealing oil section, it will enter through the gap between the annular sealing strip 45 and the outer ring component 1 and the outer ring component 2. The oil enters the oil sealing gap between the snap-fit ​​strip 51 and the oil overflow groove 46, and enters the sealing cavity of the sealing retaining ring 5 through the oil inlet gap, thereby forming pressure on the sealing film ring 52 inside, causing the sealing film ring 52 to deform so that the auxiliary extrusion sealing ring 522 and the sealing film ring 52 are in close contact with the shaft surface, thereby increasing the sealing performance on both sides of the inner ring 4; step four, when the inner ring 4 stops rotating, the spring column 4212 on the inner side of the guide ramp 4211 pulls the triangular sealing piston 422 to re-close the oil inlet 421, thereby keeping the internal lubricating oil in a pressure-sealed state.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof assembly for a bearing, comprising an outer ring assembly 1 (1) and an outer ring assembly 2 (2), wherein a connecting ring (3) is disposed outside the outer ring assembly 1 (1) and the outer ring assembly 2 (2), the side surface of the outer ring assembly 1 (1) is clamped with the side surface of the outer ring assembly 2 (2), and the outer side surfaces of the outer ring assembly 1 (1) and the outer ring assembly 2 (2) are both provided with an assembly groove adapted to the connecting ring (3), characterized in that: The outer ring assembly 1 (1) and the outer ring assembly 2 (2) are provided with sealing oil grooves (7), the inner ring (4) is provided inside the sealing oil grooves (7), and sealing retaining rings (5) are symmetrically provided on both sides of the inner ring (4). The inner sides of the outer ring assembly 1 (1) and the outer ring assembly 2 (2) are provided with integrated retaining frames (8), and the side walls of the outer ring assembly 1 (1) and the outer ring assembly 2 (2) are provided with C-shaped concentration rings (6).

2. A dustproof assembly for a bearing according to claim 1, characterized in that: A lubricating oil injection pipe (72) is symmetrically fixedly mounted on the inner wall of the sealing oil groove (7), and a sealing plug is provided at one end of the lubricating oil injection pipe (72). The inner walls of the outer ring component 1 (1) and the outer ring component 2 (2) are provided with mounting grooves matching the lubricating oil injection pipe (72), and a sealing block matching the mounting groove is fixedly mounted on the inner surface of the connecting ring (3).

3. A dustproof assembly for a bearing according to claim 2, characterized in that: A return seal bite ring 2 (71) is fixedly mounted on the inner surface of the sealing oil groove (7), and a return seal bite ring 1 (41) matching the return seal bite ring 2 (71) is symmetrically fixedly mounted on the outer surface of the inner ring (4), and an oil return gap is provided between the return seal bite ring 1 (41) and the return seal bite ring 2 (71).

4. A dustproof assembly for a bearing according to claim 1, characterized in that: The inner ring (4) is symmetrically provided with herringbone-shaped lubricating oil channels (42), and four groups of herringbone-shaped lubricating oil channels (42) are provided. The outer surface of the inner ring (4) is provided with an inner groove, and an oil inlet (421) corresponding to the position of the herringbone-shaped lubricating oil channel (42) is provided in the middle of the inner groove. A guide ramp (4211) is symmetrically fixedly installed on the outer side of the inner surface of the oil inlet (421), and a spring column (4212) is fixedly installed on the inner surface of the guide ramp (4211).

5. A dustproof assembly for a bearing according to claim 4, characterized in that: A triangular sealing piston (422) is slidably installed inside the herringbone lubricating oil channel (42), and the triangular sealing piston (422) is composed of a triangular sealing gasket and a triangular sliding plate. The outer surface of the inner ring (4) is provided with a groove adapted to the triangular sealing gasket. The triangular sliding plate is slidably installed inside the oil inlet (421), and an oil inlet hole (4221) is provided on the surface of the triangular sliding plate. One end of the spring column (4212) is fixedly connected to the side surface of the triangular sliding plate.

6. A dustproof assembly for a bearing according to claim 1, characterized in that: A first lubricating cavity (43) is provided between the inner side of the inner ring (4) and the inner sides of the outer ring component one (1) and the outer ring component two (2); a second lubricating oil cavity (44) is provided between the outer side of the inner ring (4) and the inner side of the sealing oil groove (7); an annular sealing strip (45) is symmetrically fixedly installed on the inner side of the inner ring (4); a matching groove matching the annular sealing strip (45) is provided on the inner sides of the outer ring component one (1) and the outer ring component two (2); and oil overflow grooves (46) are provided on both sides of the inner ring (4) close to the sealing retaining ring (5).

7. A dustproof assembly for a bearing according to claim 6, characterized in that: An oil sealing gap is provided between the annular sealing strip (45) and the grooves of the outer ring component one (1) and the outer ring component two (2); a snap-fit ​​strip (51) matched with the oil overflow groove (46) is provided on the inner side of the sealing retaining ring (5); an oil sealing gap is provided between the snap-fit ​​strip (51) and the oil overflow groove (46); a sealing cavity is provided on the inner surface of the sealing retaining ring (5); an oil inlet gap is provided on the side of the sealing cavity close to the oil sealing gap; a sealing membrane ring (52) is fixedly installed inside the sealing cavity; an elastic ring (521) is provided between the middle of one side surface of the sealing membrane ring (52) and the surface of the sealing cavity; an auxiliary extrusion sealing ring (522) is symmetrically fixedly installed on the lower surface of the other side of the sealing membrane ring (52).

8. The dustproof assembly for a bearing according to claim 1, characterized in that: The side walls of the outer ring assembly 1 (1) and the outer ring assembly 2 (2) are provided with mounting engaging grooves adapted to the C-shaped concentration ring (6), and a dust collecting groove (61) is provided inside the C-shaped concentration ring (6).

9. A dustproof assembly for a bearing according to claim 1, characterized in that: The side wall of the integrated retaining frame (8) is evenly distributed with ball limiting rings (81), the interior of the ball limiting rings (81) is movably installed with balls (84), and the side surfaces of the outer ring component one (1), the outer ring component two (2), and the inner ring (4) are all provided with slide rails that are compatible with the balls (84).

10. A dustproof assembly for a bearing according to claim 9, characterized in that: A support stabilizing ring (83) is provided on the inner side of the integrated retaining frame (8), the inner surface of the support stabilizing ring (83) is fixedly connected to the inner surfaces of the outer ring component one (1) and the outer ring component two (2), the integrated retaining frame (8) is snap-fitted and installed on the outer side of the support stabilizing ring (83), and the outer surfaces of the support stabilizing ring (83) and the integrated retaining frame (8) are evenly provided with guide grooves (82).

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