A corrosion-resistant, high-hardness sapphire bearing

Abstract

This application relates to the field of ceramic bearings, and in particular to a corrosion-resistant, high-hardness sapphire bearing. A corrosion-resistant, high-hardness sapphire bearing includes a sapphire inner ring, a sapphire outer ring, a cage, ceramic balls, and a dust cover. The cage has a plurality of ball-retaining grooves; the ceramic balls are disposed within the ball-retaining grooves; a grease channel communicating with the ball-retaining grooves is formed on the surface of the cage; the dust cover has an injection hole; and a rubber plug is fixedly connected to the injection hole of the dust cover. In this application, the corrosion-resistant, high-hardness sapphire bearing allows grease to be injected into the surface of the ceramic balls through the injection hole of the dust cover. Specifically, the grease sequentially passes through the injection hole of the dust cover and the grease channel formed by the cage to adhere to the surface of the ceramic balls. Rotating the sapphire bearing evenly disperses the grease across the surface of the ceramic balls, effectively simplifying the grease replenishment process for sapphire bearings.

Description

Technical Field

[0001] This application relates to the field of ceramic bearings, and in particular to a corrosion-resistant, high-hardness sapphire bearing. Background Technology

[0002] Sapphire bearings have advantages such as high hardness, high speed, high temperature resistance, low coefficient of thermal expansion, high compressive strength, and corrosion resistance. They are widely used in high-speed industrial equipment, optical instruments, precision instruments, medical equipment, high-speed motors, pressure sensors, fluid measurement instruments, and other fields.

[0003] Sapphire bearings used in precision instruments require dust protection, typically with front and rear dust covers snapped onto their front and rear sides. Newly commissioned precision instruments usually require grease replenishment after 100-500 hours of operation to achieve optimal self-lubricating properties and improve the performance and lifespan of the sapphire bearings. However, due to the precision requirements of installation, sapphire bearings cannot be disassembled. The process usually involves removing the dust cover and applying grease to the ceramic ball surface with a grease-soaked brush, making grease replenishment a rather cumbersome process. Utility Model Content

[0004] To address the cumbersome grease replenishment process for existing sapphire bearings, this application provides a corrosion-resistant, high-hardness sapphire bearing.

[0005] The corrosion-resistant, high-hardness sapphire bearing provided in this application is achieved through the following technical solution:

[0006] A corrosion-resistant, high-hardness sapphire bearing includes a sapphire inner ring, a sapphire outer ring, a cage, ceramic balls, and a dust cover. The cage has a plurality of ball retaining grooves. The ceramic balls are disposed within the ball retaining grooves. A grease channel communicating with the ball retaining grooves is formed on the surface of the cage. The dust cover has an injection hole. A rubber plug is fixedly connected to the injection hole of the dust cover.

[0007] The corrosion-resistant, high-hardness sapphire bearing of this application allows grease to be injected into the surface of ceramic balls through the injection hole of the dust cover. Specifically, the grease flows sequentially through the injection hole of the dust cover and the grease channel formed by the cage to adhere to the surface of the ceramic balls. Rotating the sapphire bearing will evenly disperse the grease on the surface of the ceramic balls, effectively simplifying the difficulty of grease replenishment for sapphire bearings and solving the problem of the cumbersome grease replenishment operation of existing sapphire bearings.

[0008] Preferably, the cage includes cage A and cage B, which are detachably connected to form the cage; cage A includes a plurality of first arc-shaped pieces and a first connecting block connected between adjacent first arc-shaped pieces; cage B includes a plurality of second arc-shaped pieces and a second connecting block connected between adjacent second arc-shaped pieces; the first arc-shaped pieces and the second arc-shaped pieces are detachably connected to form a ball retaining groove of the cage; the first arc-shaped pieces and the second arc-shaped pieces are detachably connected to form a flow channel A communicating with the ball retaining groove; the first connecting block and the second connecting block are detachably connected to form a flow channel B communicating with the flow channel A; a flow channel C communicating with the flow channel B is formed on the surface of the first connecting block; the grease flow channel is composed of flow channel A, flow channel B, and flow channel C.

[0009] By adopting the above technical solution, cage A and cage B can be detachably connected to form a cage, reducing the assembly difficulty of the cage of the sapphire bearing.

[0010] Preferably, the first connecting block has a first countersunk hole on each of its four sides; a nut is fitted into the first countersunk hole; the second connecting block has a second countersunk hole on each of its four sides, and a fastening bolt is installed in the second countersunk hole; the fastening bolt passes through the second countersunk hole, the first countersunk hole and the nut and is threadedly connected, so that the retainer A and retainer B can be detachably connected to form the retainer 3.

[0011] By adopting the above technical solution, the assembly difficulty of the sapphire bearing cage is further reduced.

[0012] Preferably, the central axes of flow channel A and flow channel B coincide; the central axis of flow channel C is perpendicular to the central axis of flow channel B.

[0013] Preferably, the flow channel C of the second connecting block is filled with a sealing rubber column to prevent wear debris from clogging the flow channel C, thereby ensuring the durability of sapphire bearing grease replenishment operations.

[0014] Preferably, the sealing rubber column has a cross groove extending through both ends, which facilitates the insertion of an external needle tube through the sealing rubber column to inject grease into the grease channel.

[0015] Preferably, the dust cover is made of transparent plastic.

[0016] By adopting the above technical solution, it is easy to connect the flow channel C with the injection hole on the dust cover. That is, the central axis of the flow channel C is collinear with the central axis of the injection hole. The external needle passes through the injection hole of the dust cover and the cross groove of the sealing rubber column, and the grease in the external needle is injected into the flow channel C. The grease flows into the surface of the ceramic ball through the flow channel C, flow channel B, and flow channel A. Rotating the sapphire bearing can evenly disperse the grease on the surface of the ceramic ball, effectively simplifying the difficulty of grease replenishment for sapphire bearings and solving the problem of the cumbersome grease replenishment operation of existing sapphire bearings.

[0017] Preferably, the outer wall of the sapphire inner ring has a first groove, and the inner wall of the sapphire outer ring has a second groove; one end of the dust cover is engaged with the first groove of the sapphire inner ring, and the other end is engaged with the second groove of the sapphire outer ring.

[0018] In summary, this application has the following advantages: the corrosion-resistant, high-hardness sapphire bearing in this application can be lubricated without removing the dust cover, which effectively simplifies the difficulty of lubricating sapphire bearings and solves the problem of the cumbersome lubricating grease replenishment operation of existing sapphire bearings. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the sapphire bearing in this application.

[0020] Figure 2 This is a schematic diagram of the structure of the sapphire bearing before and after the dust cover is removed in this application.

[0021] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is a schematic diagram of the connection structure between cage A and cage B in the sapphire bearing of this application.

[0023] Figure 5 This is a schematic diagram of the structure of the sapphire bearing after the dust cover has been removed.

[0024] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle.

[0025] Figure 7 This is a top view of the sapphire bearing in this application.

[0026] In the diagram, 1. Sapphire inner ring; 10. Outer groove; 11. First slot; 2. Sapphire outer ring; 20. Inner groove; 21. Second slot; 3. Cage; 31. Ball retainer groove; 32. Grease channel; 4. Ceramic ball; 5. Dust cover; 51. Injection hole; 52. Rubber plug; 6. Cage A; 60. Channel A; 61. First arc-shaped piece; 62. First connecting block; 621. First countersunk hole; 622. Nut; 7. Cage B; 70. Channel B; 700. Channel C; 71. Second arc-shaped piece; 72. Second connecting block; 721. Second countersunk hole; 722. Fastening bolt; 723. Sealing rubber post. Detailed Implementation

[0027] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example: Refer to Figure 1 and Figure 2 A corrosion-resistant, high-hardness sapphire bearing includes a sapphire inner ring 1, a sapphire outer ring 2, a cage 3 disposed between the sapphire inner ring 1 and the sapphire outer ring 2, ceramic balls 4, and a dust cover 5. Specifically, the outer wall of the sapphire inner ring 1 has a first groove 11, and the inner wall of the sapphire outer ring 2 has a second groove 21. One end of the dust cover 5 is engaged with the first groove 11 of the sapphire inner ring 1, and the other end is engaged with the second groove 21 of the sapphire outer ring 2. The outer wall of the sapphire inner ring 1 has an outer groove 10, and the inner wall of the sapphire outer ring 2 has an inner groove 20. The ceramic balls 4 are rotatably connected to the outer groove 10 of the sapphire inner ring 1 and the inner groove 20 of the sapphire outer ring 2. Six to ten ceramic balls 4 are rotatably connected between the sapphire inner ring 1 and the sapphire outer ring 2. Preferably, eight ceramic balls 4 are rotatably connected between the sapphire inner ring 1 and the sapphire outer ring 2.

[0029] Reference Figure 1 and Figure 4 The retainer 3 is detachably connected to the ceramic ball 4. The retainer 3 has several ball limiting grooves 31. The ceramic ball 4 is rotatably connected in the ball limiting grooves 31, so that the eight ceramic balls 4 are evenly distributed between the sapphire inner ring 1 and the sapphire outer ring 2.

[0030] Reference Figure 1 and Figure 4The cage 3 has a grease channel 32 on its surface that communicates with the ball retaining groove 31. Specifically, the cage 3 includes a cage A6 and a cage B7, which are detachably connected to form the cage 3. Eight ceramic balls 4 are rotatably connected between the sapphire inner ring 1 and the sapphire outer ring 2. The cage A6 includes eight first arc-shaped plates 61 and a first connecting block 62 connecting adjacent first arc-shaped plates 61. The cage B7 includes eight second arc-shaped plates 71 and a second connecting block 72 connecting adjacent second arc-shaped plates 71. The first arc-shaped plates 61 and the second arc-shaped plates 71 are detachably connected to form the ball retaining groove 31 of the cage 3. The first arc-shaped plates 61 and the second arc-shaped plates 71 are detachably connected to form a flow channel A60 communicating with the ball retaining groove 31. The first connecting block 62 and the second connecting block 72 are detachably connected to form a flow channel B70 communicating with the flow channel A60. The surface of the first connecting block 62 has a flow channel C700 that communicates with the flow channel B70. The central axis of the flow channel C700 is perpendicular to the central axis of the flow channel B70. In summary, the grease flow channel 32 of the cage 3 is composed of the flow channel A60, the flow channel B70, and the flow channel C700.

[0031] Reference Figure 4 and Figure 6 The second connecting block 72 has a second countersunk hole 721 on each of its four sides, and a fastening bolt 722 is installed in the second countersunk hole 721 of the second connecting block 72.

[0032] Reference Figure 3 and Figure 4 The first connecting block 62 has first countersunk holes 621 on all four sides of its surface. A nut 622 is fitted into the first countersunk hole 621 of the first connecting block 62.

[0033] Reference Figure 3 and Figure 6 The nut of the fastening bolt 722 is located in the countersunk groove of the second countersunk hole 721. The bolt of the fastening bolt 722 passes through the second countersunk hole 721, the first countersunk hole 621 and the nut 622 are threadedly connected, so that the cage A6 and the cage B7 can be detachably connected to form the cage 3.

[0034] Reference Figure 4 and reference Figure 6 The bottom surfaces of the first arc-shaped piece 61 are formed with a first flow channel A, and the bottom surfaces of the second arc-shaped piece 71 are formed with a second flow channel A. After the retainer A6 and retainer B7 are detachably connected by fastening bolts 722 and nuts 622 to form retainer 3, the first flow channel A and the second flow channel A form a flow channel A60 that communicates with the ball limiting groove 31.

[0035] Reference Figure 3 and reference Figure 4A first flow channel B is formed on the bottom surface of the first connecting block 62, and a second flow channel B is formed on the bottom surface of the second connecting block 72. After the retainer A6 and retainer B7 are detachably connected by fastening bolts 722 and nuts 622 to form retainer 3, the first flow channel B and the second flow channel B form a flow channel B70 that communicates with flow channel A60. The central axes of flow channel A60 and flow channel B70 coincide.

[0036] Reference Figure 3 and reference Figure 4 To prevent wear debris from clogging the flow channel C700 and thus ensure the durability of sapphire bearing grease replenishment, a sealing rubber column 723 is inserted into the flow channel C700 of the second connecting block 72. The sealing rubber column 723 has a cross-shaped groove extending through both end faces, facilitating the insertion of an external needle tube through the sealing rubber column to inject grease into the grease flow channel.

[0037] Reference Figure 7 The dust cover 5 has an injection hole 51, and a rubber stopper 52 is plugged into the injection hole 51 of the dust cover 5. The rubber stopper 52 includes a rubber cap and a rubber column integrally formed on the lower surface of the rubber cap. The rubber column of the rubber stopper 52 is inserted into the injection hole 51 of the dust cover 5, and the diameter of the injection hole 51 of the dust cover 5 is 0.98-0.99 times the diameter of the rubber column of the rubber stopper 52. The dust cover 5 is made of transparent plastic, specifically transparent PMMA. When replenishing grease, the transparent dust cover 5 facilitates the connection between the flow channel C700 and the injection hole 51 on the dust cover 5, that is, the central axis of the flow channel C700 and the central axis of the injection hole 51 are collinear. The rubber plug 52 is removed, and the external needle is inserted through the injection hole 51 of the dust cover 5 and the cross groove 724 of the sealing rubber column 723. The grease in the external needle is injected into the flow channel C700. The grease flows into the surface of the ceramic ball 4 through the flow channel C700, flow channel B70, and flow channel A60. Rotating the sapphire bearing will evenly distribute the grease on the surface of the ceramic ball 4, effectively simplifying the grease replenishment operation of the sapphire bearing.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A corrosion resistant high hardness sapphire bearing, characterized by: The device includes a sapphire inner ring (1), a sapphire outer ring (2), a retainer (3) disposed between the sapphire inner ring (1) and the sapphire outer ring (2), ceramic balls (4), and a dust cover (5). The retainer (3) has a plurality of ball limiting grooves (31). The ceramic balls (4) are disposed in the ball limiting grooves (31). The surface of the retainer (3) has a grease channel (32) communicating with the ball limiting grooves (31). The dust cover (5) has an injection hole (51). A rubber plug (52) is fixedly connected to the injection hole (51) of the dust cover (5). The retainer (3) includes a retainer A (6) and a retainer B (7). The retainer A (6) and retainer B (7) are detachably connected to form the retainer (3). The retainer A (6) includes a plurality of first arc-shaped pieces (61) and connected to adjacent first arc-shaped pieces (61). 1) The first connecting block (62) between the cage B (7) includes a plurality of second arc-shaped pieces (71) and a second connecting block (72) connected between adjacent second arc-shaped pieces (71). The first arc-shaped pieces (61) and the second arc-shaped pieces (71) are detachably connected to form a ball limiting groove (31) of the cage (3). The first arc-shaped pieces (61) and the second arc-shaped pieces (71) are detachably connected to form a flow channel A (60) communicating with the ball limiting groove (31). The first connecting block (62) and the second connecting block (72) are detachably connected to form a flow channel B (70) communicating with the flow channel A (60). The surface of the first connecting block (62) is formed with a flow channel C (700) communicating with the flow channel B (70). The grease flow channel (32) is composed of flow channel A (60), flow channel B (70), and flow channel C (700).

2. The corrosion resistant high hardness sapphire bearing of claim 1, wherein: The first connecting block (62) has a first countersunk hole (621) on each of its four sides; a nut (622) is fitted into the first countersunk hole (621); the second connecting block (72) has a second countersunk hole (721) on each of its four sides; a fastening bolt (722) is installed in the second countersunk hole (721); the fastening bolt (722) passes through the second countersunk hole (721), the first countersunk hole (621) and the nut (622) and is threadedly connected, so that the retainer A (6) and the retainer B (7) can be detachably connected to form the retainer (3).

3. The corrosion resistant high hardness sapphire bearing of claim 1, wherein: The central axis of flow channel A (60) coincides with that of flow channel B (70); the central axis of flow channel C (700) is perpendicular to that of flow channel B (70).

4. The corrosion resistant high hardness sapphire bearing of claim 3, wherein: The flow channel C (700) of the second connecting block (72) is filled with a sealing rubber column (723).

5. The corrosion resistant high hardness sapphire bearing of claim 4, wherein: The sealing rubber column (723) has a cross groove that runs through both ends.

6. The corrosion resistant high hardness sapphire bearing of claim 1, wherein: The dust cover (5) is made of transparent plastic.

7. A corrosion-resistant, high-hardness sapphire bearing according to claim 6, characterized in that: The outer wall of the sapphire inner ring (1) has a first slot (11), and the inner wall of the sapphire outer ring (2) has a second slot (21); one end of the dust cover (5) is engaged with the first slot (11) of the sapphire inner ring (1), and the other end is engaged with the second slot (21) of the sapphire outer ring (2).

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