Ceramic ball bearing

Abstract

The utility model relates to a ceramic ball bearing and belongs to the technical field of bearings, the ceramic ball bearing comprises a bearing assembly, a pair of dust covers and an elastic connecting assembly, the bearing assembly comprises an outer ring, an inner ring arranged in the outer ring and a plurality of ceramic balls arranged between the outer ring and the inner ring, the pair of dust covers are oppositely arranged on the two sides of the ceramic balls, and the elastic connecting assembly is arranged between the outer ring and the inner ring. The elastic connecting assembly comprises a first inserting block and a second inserting block which are oppositely arranged on the dustproof cover, a reset spring is arranged between the first inserting block and the second inserting block, and a first inserting ring groove allowing the first inserting block to be inserted is formed in the inner side wall of the outer ring; and a second inserting ring groove allowing the second inserting block to be inserted is formed in the outer side wall of the inner ring. The dustproof cover has the effect of being convenient for an operator to disassemble the dustproof cover.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a ceramic ball bearing. Background Art

[0002] Bearings are an important component in contemporary mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. Ceramic balls have a small thermal expansion coefficient and will not expand the bearing balls due to temperature reasons in high temperature environments. This greatly increases the operating temperature of the entire bearing. The temperature of ordinary bearings is around 160°C, and the temperature of ceramic balls can reach over 220°C. Ceramic balls have oil-free self-lubricating properties, and ordinary bearings have a small friction coefficient, so ceramic ball bearings have a very high speed. Ceramic balls do not require any grease, which means that even if the grease dries up, the bearings can still operate, thus avoiding the occurrence of premature damage to the bearings in ordinary bearings due to grease drying up. Bearings using ceramic balls can insulate the inner and outer rings of the bearings, because ceramic balls are insulators. Using ceramic balls between the inner and outer rings of the bearings can achieve an insulating effect, so that the bearings can be used in a conductive environment.

[0003] Currently common ceramic ball bearings include an outer ring, an inner ring and several ceramic balls. The inner ring is arranged inside the outer ring, and several ceramic balls are arranged between the outer ring and the inner ring. Dust covers are arranged on both sides of the ceramic balls. One end of the dust cover is clamped with the inner wall of the outer ring, and the other end of the dust cover is clamped with the outer wall of the inner ring, so that dust particles are not easy to enter the connection between the ceramic balls, the outer ring and the inner ring, and the ceramic balls are not easy to crack.

[0004] Since the dust cover is connected to the outer ring and the inner ring by a snap connection, the accuracy of the bearing decreases after long-term use. When the bearing needs to be inspected, the dust cover needs to be removed. At present, the dust cover is usually pried open with the help of an external tool such as a crowbar or other tools to disconnect the dust cover from the outer ring and the inner ring. However, if there is no crowbar or other tools, it is difficult for the operator to remove the dust cover. Therefore, the snap connection method is not convenient for the operator to disassemble the dust cover. Utility Model Content

[0005] In order to facilitate the operator to disassemble the dust cover, the present application provides a ceramic ball bearing.

[0006] The present application provides a ceramic ball bearing, which adopts the following technical solution:

[0007] A ceramic ball bearing comprises a bearing assembly, a pair of dust covers and an elastic connection assembly, wherein the bearing assembly comprises an outer ring, an inner ring arranged inside the outer ring and a plurality of ceramic balls arranged between the outer ring and the inner ring, the pair of dust covers are arranged on both sides of the ceramic balls opposite to each other, the elastic connection assembly comprises a first plug-in block and a second plug-in block arranged on the dust covers opposite to each other, a return spring is arranged between the first plug-in block and the second plug-in block, a first plug-in ring groove for plugging in the first plug-in block is arranged on the inner side wall of the outer ring, and a second plug-in ring groove for plugging in the second plug-in block is arranged on the outer side wall of the inner ring.

[0008] By adopting the above technical scheme, a first plug-in block and a second plug-in block are arranged opposite to each other on the dust cover, a return spring is arranged between the first plug-in block and the second plug-in block, and a first plug-in ring groove for plugging in the first plug-in block is arranged at the inner side wall of the outer ring, and a second plug-in ring groove for plugging in the second plug-in block is arranged at the outer side wall of the inner ring, so that the first plug-in block and the second plug-in block can be taken out from the first plug-in ring groove and the second plug-in ring groove respectively by pinching the first plug-in block and the second plug-in block and moving them in relative directions. At this time, the dust cover can be taken out from between the outer ring and the inner ring, which is conducive to the operator's convenience in disassembling the dust cover.

[0009] Optionally, a mounting groove is provided at an end surface of the dust cover facing away from the ceramic ball, and the first plug-in block, the second plug-in block and the reset spring are located in the mounting groove.

[0010] By adopting the above technical solution, a mounting groove is provided at the end surface of the dust cover away from the ceramic ball, and the first plug-in block, the second plug-in block and the return spring are all located in the mounting groove, which is beneficial to reducing the space occupied by the first plug-in block, the second plug-in block and the return spring installed on the dust cover.

[0011] Optionally, a first connecting groove for the first plug-in block to pass through is provided at the groove wall of the installation groove close to the first plug-in ring groove, and a second connecting groove for the second plug-in block to pass through is provided at the groove wall of the installation groove close to the second plug-in ring groove.

[0012] By adopting the above technical solution, a first connecting groove for the first plug-in block to pass through is provided at the groove wall of the installation groove close to the first plug-in ring groove, so that the first plug-in block can be plugged into the first plug-in ring groove through the first connecting groove, and a second connecting groove for the second plug-in block to pass through is provided at the groove wall of the installation groove close to the second plug-in ring groove, so that the second plug-in block can be plugged into the second plug-in ring groove through the second connecting groove.

[0013] Optionally, both the first plug-in ring groove notch and the second plug-in ring groove notch are provided with chamfers.

[0014] By adopting the above technical solution, chamfers are provided at the notch of the first plug-in ring groove and the grass mouth of the second plug-in ring groove, so that it is not easy to get stuck when the first plug-in block is inserted into the first plug-in ring groove and the second plug-in block is inserted into the second plug-in ring groove.

[0015] Optionally, a sealing plate is provided between the first plug-in block and the second plug-in block, and the sealing plate is located at a position of the mounting groove close to a notch.

[0016] By adopting the above technical solution, a sealing plate is provided between the first plug-in block and the second plug-in block, and the sealing plate is located near the slot of the installation slot, which is beneficial to improving the sealing performance of the sealing slot and making it difficult for dust particles to enter the installation slot.

[0017] Optionally, a first positioning ring block is provided at the inner side wall of the outer ring, and a second positioning ring block is provided at the outer side wall of the inner ring, and the first positioning ring block cooperates with the second positioning ring block to pre-position the dust cover.

[0018] By adopting the above technical scheme, a first positioning ring block is provided at the inner wall of the outer ring, and a second positioning ring block is provided at the outer wall of the inner ring, so that the first positioning ring block and the second positioning ring block cooperate to pre-position the dust cover. After the first positioning ring block and the second positioning ring block pre-position the dust cover, it is convenient to align the first connecting groove and the first plug-in ring groove, and to align the second connecting groove and the second plug-in ring groove, which is conducive to the plug-in of the first plug-in block and the first plug-in ring groove, and the plug-in of the second plug-in block and the second plug-in ring groove.

[0019] Optionally, a first sealing ring groove is provided at the side walls of the dust cover respectively abutting against the outer ring and the inner ring, a sealing ring is provided in the first sealing ring groove, and one end of the sealing ring away from the bottom of the first sealing ring groove protrudes out of the first sealing ring groove.

[0020] By adopting the above technical solution, a first sealing ring groove is provided at the side walls where the dust cover abuts the outer ring and the inner ring respectively, and a sealing ring is provided in the first sealing ring groove. The end of the sealing ring facing away from the bottom of the first sealing ring groove protrudes out of the first sealing ring groove, which is beneficial to improving the sealing performance and makes it difficult for dust particles to enter from between the dust cover and the outer ring and the inner ring.

[0021] Optionally, the outer ring and the inner ring are respectively aligned with the side walls of the sealing ring and are provided with second sealing ring grooves for the sealing ring to be inserted.

[0022] By adopting the above technical solution, second sealing ring grooves for inserting the sealing ring are provided on the side walls of the outer ring and the inner ring respectively aligned with the sealing ring, which is beneficial to further improve the sealing between the dust cover and the outer ring and the inner ring.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. A first plug-in block and a second plug-in block are arranged opposite to each other on the dust cover, a return spring is arranged between the first plug-in block and the second plug-in block, and a first plug-in ring groove for plugging the first plug-in block is arranged at the inner side wall of the outer ring, and a second plug-in ring groove for plugging the second plug-in block is arranged at the outer side wall of the inner ring, so that the first plug-in block and the second plug-in block can be taken out from the first plug-in ring groove and the second plug-in ring groove respectively by pinching the first plug-in block and the second plug-in block and moving them in opposite directions, and the dust cover can be taken out from between the outer ring and the inner ring, which is convenient for the operator to disassemble the dust cover;

[0025] 2. A mounting groove is provided at one end surface of the dust cover away from the ceramic ball, and the first plug-in block, the second plug-in block and the return spring are all located in the mounting groove, which is conducive to reducing the space occupied by the first plug-in block, the second plug-in block and the return spring installed on the dust cover;

[0026] 3. A first connecting groove for the first plug-in block to pass through is provided at the groove wall of the installation groove close to the first plug-in ring groove, so that the first plug-in block can be plugged into the first plug-in ring groove through the first connecting groove; a second connecting groove for the second plug-in block to pass through is provided at the groove wall of the installation groove close to the second plug-in ring groove, so that the second plug-in block can be plugged into the second plug-in ring groove through the second connecting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the overall structure in the embodiment of the present application.

[0028] Figure 2 is a cross-sectional view of a bearing assembly in an embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of the overall structure in an embodiment of the present application.

[0030] Figure 4 yes Figure 3 Schematic diagram of the structure of part A in the middle.

[0031] Figure 5 It is a cross-sectional view of the dust cover in the embodiment of the present application.

[0032] Figure 6 It is a schematic diagram of the structure of the sealing plate in the embodiment of the present application.

[0033] Figure 7 It is a structural schematic diagram of the first plug-in block in an embodiment of the present application.

[0034] Figure 8 yes Figure 5 Schematic diagram of the structure of part B.

[0035] Explanation of the accompanying drawings: 1. bearing assembly; 11. outer ring; 111. first rolling groove; 112. second sealing ring groove; 113. first plug-in ring groove; 1131. chamfer; 114. first positioning ring block; 12. inner ring; 121. second rolling groove; 122. second plug-in ring groove; 123. second positioning ring block; 13. ceramic ball; 2. dust cover; 21. first sealing ring groove; 22. sealing ring; 23. mounting groove; 231. second connecting groove; 232. first connecting groove; 233. second connecting groove; 24. sealing plate; 241. first connecting strip; 242. second connecting strip; 3. elastic connecting assembly; 31. first plug-in block; 311. first connecting groove; 312. protrusion; 313. plug-in portion; 32. second plug-in block; 33. return spring. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-8 This application is described in further detail.

[0037] The present application embodiment discloses a ceramic ball bearing. Figure 1 A ceramic ball bearing comprises a bearing assembly 1, a pair of dust covers 2 and an elastic connection assembly 3. The pair of dust covers 2 can be quickly installed and disassembled with the bearing assembly 1 through the elastic connection assembly 3.

[0038] Reference Figure 2 The bearing assembly 1 includes an outer ring 11, an inner ring 12 and a plurality of ceramic balls 13. The inner ring 12 is arranged inside the outer ring 11. A first rolling groove 111 is opened on the inner wall of the outer ring 11, and a second rolling groove 121 is opened on the outer wall of the inner ring 12. The plurality of ceramic balls 13 are placed between the outer ring 11 and the inner ring 12 and between the first rolling groove 111 and the second rolling groove 121.

[0039] Reference Figure 3 and Figure 4 A pair of dust covers 2 are respectively arranged between the outer ring 11 and the inner ring 12 and on both sides of the ceramic ball 13. A pair of dust covers 2 are respectively located on both sides of the ceramic ball 13, which are the upper side and the lower side of the ceramic ball 13 respectively. In order to improve the sealing between the dust cover 2 and the outer ring 11 and the inner ring 12, a first sealing ring groove 21 is opened on the outer wall and the inner wall of the dust cover 2, and a sealing ring 22 made of rubber material is arranged in the first sealing ring groove 21. The cross-sections of the first sealing ring groove 21 and the sealing ring 22 are both "T"-shaped. Second sealing ring grooves 112 are opened on the inner and outer walls of the outer ring 11 and the inner ring 12 respectively aligned with the sealing ring 22. One end of the sealing ring 22 away from the bottom of the first sealing ring groove 21 protrudes from the first sealing ring groove 21 and is inserted into the second sealing ring groove 112.

[0040] Reference Figure 1 , Figure 4 and Figure 5 The elastic connection component 3 is arranged on a pair of dust covers 2. The elastic connection component 3 includes a first plug-in block 31, a second plug-in block 32 and a return spring 33. The first plug-in block 31, the second plug-in block 32 and the return spring 33 form a group of elastic connection components 3. In this embodiment, in order to stably connect the dust cover 2 with the outer ring 11 and the inner ring 12, two groups of elastic connection components 3 are arranged on one dust cover 2. The two groups of elastic connection components 3 are relatively arranged on the dust cover 2, and the upper end surface of the dust cover 2 is opened. A mounting groove 23 is provided, and the first plug-in block 31, the second plug-in block 32 and the return spring 33 are installed in the mounting groove 23, the first plug-in block 31 and the second plug-in block 32 are relatively arranged in the mounting groove 23, and the two ends of the return spring 33 are arranged between the first plug-in block 31 and the second plug-in block 32, one end of the return spring 33 is welded to the side wall of the first plug-in block 31 facing the second plug-in block 32, and the other end of the return spring 33 is welded to the side wall of the second plug-in block 32 facing the first plug-in block 31.

[0041] Reference Figure 4 , Figure 6 , Figure 7 and Figure 8 In order to prevent dust particles from entering the installation groove 23, a sealing plate 24 made of rubber is arranged between the first plug-in block 31 and the second plug-in block 32, and the sealing plate 24 is located above the reset spring 33. In order to fix the sealing plate 24 between the first plug-in block 31 and the second plug-in block 32, first connecting strips 241 are integrally formed at the two side walls where the sealing plate 24 abuts against the first plug-in block 31 and the second plug-in block 32, and first connecting grooves 311 are respectively provided at the positions where the first plug-in block 31 and the second plug-in block 32 are aligned with the first connecting strip 241, and second connecting strips 242 are integrally formed at the two side walls where the sealing plate 24 abuts against the installation groove 23, and second connecting grooves 231 are respectively provided at the groove walls where the installation groove 23 is aligned with the second connecting strip 242, so that the sealing plate 24 is fixed between the first plug-in block 31 and the second plug-in block 32 through the first connecting strip 241 and the first connecting groove 311 and the second connecting strip 242 and the second connecting groove 231.

[0042] Reference Figure 4 , Figure 5 and Figure 7The first plug-in block 31 and the second plug-in block 32 are both in an "L" shape. The first plug-in block 31 and the second plug-in block 32 both include a protruding portion 312 and a plug-in portion 313. The protruding portion 312 and the plug-in portion 313 are integrally formed in an "L" shape. The protruding portion 312 protrudes from the mounting groove 23. A first connecting groove 232 is provided at the groove wall where the mounting groove 23 is aligned with the plug-in portion 313 of the first plug-in block 31. A first plug-in ring groove 113 is provided at a position where the inner side wall of the outer ring 11 is aligned with the first connecting groove 232, so that the first plug-in block The plug-in portion 313 of 31 can pass through the first connecting groove 232 and be plugged into the first plug-in ring groove 113, a second connecting groove 233 is provided at the groove wall of the installation groove 23 aligned with the plug-in portion 313 of the second plug-in block 32, and a second plug-in ring groove 122 is provided at the position of the outer wall of the inner ring 12 aligned with the second connecting groove 233, so that the plug-in portion 313 of the second plug-in block 32 can pass through the second connecting groove 233 and be plugged into the second plug-in ring groove 122, and the first plug-in ring groove 113 and the second plug-in ring groove 122 are both in annular shape.

[0043] Reference Figure 4 , Figure 5 and Figure 7 In order to prevent the plug-in portion 313 of the first plug-in block 31 and the plug-in portion 313 of the second plug-in block 32 from getting stuck when they are respectively plugged with the first plug-in ring groove 113 and the second plug-in ring groove 122, chamfers 1131 are integrally formed at the edges of the grooves of the first plug-in ring groove 113 and the second plug-in ring groove 122, and a first positioning ring block 114 and a second positioning ring block 123 are integrally formed at the inner side wall of the outer ring 11 and the outer side wall of the inner ring 12, respectively. The first positioning ring block 114 and the second positioning ring block 123 are respectively located below the first plug-in ring groove 113 and the second plug-in ring groove 122, so that when the lower end surface of the dust cover 2 abuts against the first positioning ring block 114 and the second positioning ring block 123, the first connecting groove 232 and the second connecting groove 233 are respectively aligned with the first plug-in ring groove 113 and the second plug-in ring groove 122.

[0044] The implementation principle of a ceramic ball bearing in the embodiment of the present application is as follows: insert the sealing ring 22 into the first sealing ring groove 21, pinch the protrusions 312 of the first plug-in block 31 and the second plug-in block 32 and move them in opposite directions, so that the plug-in parts 313 of the first plug-in block 31 and the second plug-in block 32 are respectively moved back into the first connecting groove 232 and the second connecting groove 233, and insert the dust cover 2 between the outer ring 11 and the inner ring 12. When the dust cover 2 is in contact with the first positioning ring block 114 and the second positioning ring block 123, release the protrusions 312 of the first plug-in block 31 and the second plug-in block 32. Under the action of the reset spring 33, the first plug-in block The first plug-in block 31 and the second plug-in block 32 move in opposite directions, so that the plug-in portions 313 of the first plug-in block 31 and the second plug-in block 32 respectively pass through the first connecting groove 232 and the second connecting groove 233 and finally plug into the first plug-in ring groove 113 and the second plug-in ring groove 122 respectively, and at the same time, one end of the sealing ring 22 protruding from the first sealing ring groove 21 is also plugged into the second sealing ring groove 112, and the sealing plate 24 is installed between the first plug-in block 31 and the second plug-in block 32. In addition to improving the sealing performance of the installation groove 23, it can also make the protruding portions 312 of the first plug-in block 31 and the second plug-in block 32 not easy to move in opposite directions;

[0045] When the bearing assembly 1 needs to be inspected after long-term use, pinch the protrusions 312 of the first plug-in block 31 and the second plug-in block 32 and move them in opposite directions. At this time, the sealing plate 24 is bent under the relative force so that it can be removed from between the first plug-in block 31 and the second plug-in block 32. At the same time, the plug-in portions 313 of the first plug-in block 31 and the second plug-in block 32 are disconnected from the first plug-in ring groove 113 and the second plug-in ring groove 122 respectively. At this time, the dust cover 2 can be removed from between the outer ring 11 and the inner ring 12.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A ceramic ball bearing, characterized in that: The invention comprises a bearing assembly (1), a pair of dust covers (2) and an elastic connection assembly (3), wherein the bearing assembly (1) comprises an outer ring (11), an inner ring (12) arranged inside the outer ring (11) and a plurality of ceramic balls (13) arranged between the outer ring (11) and the inner ring (12), the pair of dust covers (2) being arranged on both sides of the ceramic balls (13) in a relative manner, the elastic connection assembly (3) comprising a first plug-in block (31) and a second plug-in block (32) arranged on the dust covers (2) in a relative manner, a return spring (33) being arranged between the first plug-in block (31) and the second plug-in block (32), a first plug-in ring groove (113) for plugging in the first plug-in block (31) being arranged on the inner side wall of the outer ring (11), and a second plug-in ring groove (122) for plugging in the second plug-in block (32) being arranged on the outer side wall of the inner ring (12).

2. A ceramic ball bearing according to claim 1, characterized in that: A mounting groove (23) is provided at one end surface of the dust cover (2) facing away from the ceramic ball (13), and the first plug-in block (31), the second plug-in block (32) and the return spring (33) are located in the mounting groove (23).

3. A ceramic ball bearing according to claim 2, characterized in that: A first connecting groove (232) for the first plug-in block (31) to pass through is provided at a groove wall of the installation groove (23) close to the first plug-in ring groove (113), and a second connecting groove (233) for the second plug-in block (32) to pass through is provided at a groove wall of the installation groove (23) close to the second plug-in ring groove (122).

4. A ceramic ball bearing according to claim 3, characterized in that: The notch of the first plug-in ring groove (113) and the notch of the second plug-in ring groove (122) are both provided with chamfers (1131).

5. A ceramic ball bearing according to claim 4, characterized in that: A sealing plate (24) is provided between the first plug-in block (31) and the second plug-in block (32), and the sealing plate (24) is located at a position of the installation groove (23) close to the notch.

6. A ceramic ball bearing according to claim 1, characterized in that: A first positioning ring block (114) is provided on the inner wall of the outer ring (11), and a second positioning ring block (123) is provided on the outer wall of the inner ring (12); the first positioning ring block (114) and the second positioning ring block (123) cooperate to pre-position the dust cover (2).

7. A ceramic ball bearing according to claim 6, characterized in that: The dust cover (2) is provided with a first sealing ring groove (21) at the side walls respectively contacting the outer ring (11) and the inner ring (12), a sealing ring (22) is provided in the first sealing ring groove (21), and one end of the sealing ring (22) facing away from the bottom of the first sealing ring groove (21) protrudes out of the first sealing ring groove (21).

8. A ceramic ball bearing according to claim 7, characterized in that: Second sealing ring grooves (112) for inserting the sealing ring (22) are provided on the side walls of the outer ring (11) and the inner ring (12) respectively aligned with the sealing ring (22).

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