A double groove bearing

Abstract

The utility model discloses a double channel bearing relates to the field of bearing technology, it includes bearing and bearing bush, and bearing bush is sleeved in the bearing outside, and with bearing coaxial setting, the bearing outer wall is along the circumferential and is set with two mutually parallel annular groove no.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a double-groove bearing. Background Technology

[0002] Currently, bearings play a crucial role in mechanical rotation. Their main function is to support the shaft and reduce friction. There are usually balls between the bearing sleeve and the bearing, and the bearing sleeve and the bearing rotate relative to each other through the rolling of the balls.

[0003] Related technology can be found in Chinese Patent No. CN216742448U, which discloses a deep groove ball bearing including an outer ring, an inner ring, a cage, balls, and an oiling device. The balls are movably connected inside the cage, and a rotating cavity for housing the cage and balls is formed between the outer and inner rings. An oiling device is provided inside the outer ring. This utility model of a deep groove ball bearing solves the problem of poor lubrication of the balls inside the bearing. By adding lubricating oil to the balls through oil grooves provided on the bearing outer ring, it solves the problem of wear of some balls inside the bearing due to lack of lubrication.

[0004] Regarding the aforementioned technologies, the bearing and bearing sleeve are connected only through a single groove and roll with the balls. When the bearing and bearing sleeve are subjected to large pressure during rotation, the stress is concentrated on the single groove, which can easily lead to relative displacement of the bearing along the bearing sleeve along the axis, which is not conducive to improving the stability of the bearing. Utility Model Content

[0005] To improve the stability of bearings, this application provides a double-groove bearing.

[0006] This application provides a double-slot bearing, which adopts the following technical solution: A double-groove bearing includes a bearing and a bearing sleeve. The bearing is located inside the bearing sleeve and is coaxially arranged with the bearing sleeve. Two annular grooves I are formed circumferentially on the outer wall of the bearing. Two annular grooves II, corresponding to the annular grooves I, are formed circumferentially on the inner wall of the bearing sleeve. A plurality of balls are arranged circumferentially within the annular grooves II, and the balls are in rolling contact with the inner wall of the annular grooves I. Two isolation rings I are detachably connected to both sides of the inner wall of the bearing sleeve along its own axis to isolate the balls. A receiving groove I, adapted to the isolation rings, is formed circumferentially on the inner wall of the bearing sleeve. The isolation rings I are located within the receiving groove. The bearing sleeve is fitted into the receiving groove and has several vent holes radially opened on the inner wall. One end of the vent hole is connected to the outside and the other end is connected to the inside of the bearing sleeve. The inner walls of both ends of the bearing sleeve along the axial direction are provided with limiting grooves in the circumferential direction. The limiting groove is located on the side of the annular groove away from the middle part of the bearing sleeve. The limiting groove is connected to the vent hole. A ring is placed in the limiting groove. The ring is made of deformable material. The ring is in an expanded state at room temperature and blocks the vent hole. When heated, it shrinks. At this time, the thickness of the ring is less than the diameter of the vent hole and contacts the outer wall of the bearing.

[0007] By adopting the above technical solution, the bearing sleeve is supported and limited by a pair of isolation rings in the receiving groove, and the annular groove 2 limits and supports the balls. The annular groove 1 rolls with the balls, allowing relative rotation between the bearing and the bearing sleeve. The isolation rings 1 evenly isolate several balls, allowing all balls to roll independently, reducing the probability of collisions between balls affecting bearing rotation. The limiting groove limits the displacement of the ring along its own axial direction. At room temperature, the ring blocks the vent hole, reducing the probability of external impurities entering the bearing sleeve and affecting ball rolling. When the bearing rotates, the internal temperature of the bearing sleeve rises, the ring contracts, exposing the vent hole and relieving the internal pressure of the bearing sleeve. This helps to balance the internal and external pressures of the bearing sleeve and improves the stability of bearing rotation. The two annular grooves 1 and 2 work together to bear the radial load of the bearing, reducing the probability of relative displacement between the bearing and the bearing sleeve along the axial direction, further improving the working stability of the bearing sleeve and the bearing.

[0008] Optionally, the isolation ring is provided with a plurality of isolation grooves adapted to the ball bearings along the circumferential direction, and a plurality of buffer grooves are provided between adjacent isolation grooves.

[0009] By adopting the above technical solution, the isolation ring 1 evenly separates the balls through the isolation groove, and the buffer groove 1 provides buffer space for the balls when adjacent balls are close together, thus buffering the rolling speed of the balls and improving the stability of the rolling balls.

[0010] Optionally, the annular groove has a fixed groove along its circumference, and the fixed groove contains lubricating oil.

[0011] By adopting the above technical solution, the fixed groove stores the lubricating oil. During the rolling process of the ball, the lubricating oil is applied to the surface of the ball, which reduces the friction between the ball and the first and second annular grooves during rolling, and helps to extend the service life of the ball.

[0012] Optionally, the two ends of the vent are covered with a breathable membrane.

[0013] By adopting the above technical solution, the breathable membrane isolates external impurities while balancing internal and external air pressure, further improving the stability of the bearing sleeve during rotation.

[0014] Optionally, the inner wall of the receiving groove on the side away from the middle part of the bearing sleeve is inclined from both ends of the bearing sleeve.

[0015] By adopting the above technical solution, the operator can take out the isolation ring one in the inclined direction of the receiving groove one, and guide the isolation ring one with the inclined surface, which helps to improve the ease of disassembly of the isolation ring one.

[0016] Optionally, the thickness of the annulus gradually decreases from the bearing sleeve towards the bearing.

[0017] By adopting the above technical solution, the thickness of the contact area between the ring and the bearing is thinner. By reducing the contact area between the ring and the bearing, the friction between the ring and the bearing is reduced, thereby reducing the probability of affecting the rotation of the bearing.

[0018] Optionally, the inner wall of the bearing sleeve is provided with a pressure relief cavity that communicates with the interior of the bearing sleeve.

[0019] By adopting the above technical solution, when the bearing rotates, the pressure relief chamber disperses the air pressure inside the bearing sleeve, reducing the probability that the pressure inside the bearing sleeve is too high and thus pushes the disk off the bearing sleeve, which is beneficial to improving the stability of the bearing during rotation.

[0020] Optionally, an isolation ring 2 is provided in the middle of the inner wall of the bearing sleeve, and isolation groove 2 and buffer groove 2 adapted to the ball are provided on both sides of the isolation ring 2 along its own axis.

[0021] By adopting the above technical solution, the bearing sleeve supports the second isolation ring, and the second isolation ring isolates the balls through the second isolation groove, reducing the probability of the balls touching each other and affecting the rotation of the bearing. The second buffer groove provides buffer space between adjacent balls, reducing the probability of the balls colliding with each other due to excessive rotation speed, which is beneficial to improving the stability and safety of the ball rotation.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The bearing sleeve is supported and limited by a pair of isolation rings in the receiving groove, and the rolling balls are limited and supported by the annular groove. The annular groove rolls with the rolling balls, allowing relative rotation between the bearing and the bearing sleeve. The isolation rings evenly isolate several rolling balls, allowing all balls to roll independently and reducing the probability of collisions between balls affecting the bearing rotation. The limiting groove limits the displacement of the ring along its own axial direction. At room temperature, the ring blocks the vent hole, reducing the probability of external impurities entering the bearing sleeve and affecting the rolling of the balls. When the bearing rotates, the internal temperature of the bearing sleeve rises, the ring contracts, and the vent hole is exposed, relieving the internal pressure of the bearing sleeve. This helps to balance the internal and external pressure of the bearing sleeve and improve the stability of the bearing rotation. The two annular grooves cooperate to bear the radial load of the bearing, reducing the probability of relative displacement between the bearing and the bearing sleeve along the axial direction, further improving the working stability of the bearing sleeve and the bearing. 2. The isolation ring one separates the balls evenly through the isolation groove, and the buffer groove one provides buffer space for the balls when adjacent balls are close together, which buffers the rolling speed of the balls and helps to improve the stability of the rolling of the balls. 3. The fixed groove stores the lubricating oil. During the rolling process, the lubricating oil is applied to the surface of the ball to reduce the friction between the ball and the annular groove one and annular groove two, which helps to extend the service life of the ball. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0024] Figure 2 This is a cross-sectional schematic diagram of the bearing sleeve.

[0025] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0026] Figure 4 This is a schematic diagram designed to highlight the structure of the isolation ring.

[0027] Figure 5 This is a schematic diagram designed to highlight the pressure relief chamber structure in Embodiment 2.

[0028] Figure 6 This is a schematic diagram designed to highlight the structure of the second isolation ring in Embodiment 3.

[0029] Explanation of reference numerals in the attached drawings: 1. Bearing; 11. Annular groove one; 12. Fixing groove; 2. Bearing sleeve; 21. Annular groove two; 22. Ball; 23. Receiving groove one; 24. Vent hole; 25. Vent membrane; 26. Ring; 27. Limiting groove; 3. Isolation ring one; 31. Isolation groove one; 32. Buffer groove one; 4. Pressure relief chamber; 5. Isolation ring two; 51. Isolation groove two; 52. Buffer groove two. Detailed Implementation

[0030] The present application will be further described in detail below with reference to all the accompanying drawings.

[0031] This application discloses a double-groove bearing.

[0032] Example 1 Reference Figure 1 and Figure 2 A double-groove bearing 1 includes a bearing 1 and a bearing sleeve 2. The bearing sleeve 2 is fitted on the outside of the bearing 1 and is coaxially arranged with the bearing 1. The outer wall of the bearing sleeve 2 has an arc-shaped groove along the circumference for connecting with external equipment. The outer wall of the bearing 1 has two parallel annular grooves 11 along the circumference. The inner wall of the bearing sleeve 2 has an annular groove 21 corresponding to the annular grooves 11 along the circumference. Multiple balls 22 are rolled in the annular groove 21. In the installed state, the balls 22 are rolled in contact with the inner wall of the corresponding annular groove 11. The two annular grooves 11 and the annular groove 21 work together to distribute the radial pressure on the bearing 1, reducing the stress on a single annular groove 11 and reducing the probability of irregular oscillation and sliding of the balls 22, which is beneficial to improving the structural strength and working stability of the bearing 1.

[0033] Reference Figure 2 and Figure 3 Two isolation rings 3 are installed between bearing 1 and bearing sleeve 2. The inner wall of bearing sleeve 2 is provided with a receiving groove 23 along the circumferential direction to accommodate the isolation rings 3. The receiving groove 23 supports and limits the isolation rings 3. The two isolation rings 3 are located at both ends of bearing sleeve 2 along the axial direction. The side of isolation ring 3 near ball 22 is provided with an isolation groove 31 along the circumferential direction corresponding to ball 22. Ball 22 is located in isolation groove 31 and contacts the inner wall of isolation groove 31. Isolation groove 31 uniformly isolates ball 22, reducing the probability of ball 22 colliding with each other and causing interference when rolling, which is beneficial to improving the rolling stability of ball 22.

[0034] Reference Figure 3 The isolation ring 3 has a buffer groove 32 between adjacent isolation grooves 31. The buffer groove 32 deforms when two adjacent balls 22 approach or move away, providing buffer space for the movement of the balls 22, reducing the probability of wear caused by hard contact between the balls 22 and the isolation groove 31, and reducing the probability of contact between adjacent balls 22, which is beneficial to improving the rolling stability of the balls 22 and the service life of the balls 22.

[0035] Reference Figure 3The bearing sleeve 2 has multiple vent holes 24 at both ends along the axial direction. One end of the vent hole 24 is connected to the inside of the bearing sleeve 2, and the other end extends radially along the bearing sleeve 2 to the end face of the bearing sleeve 2 and is connected to the outside. Vent membranes 25 are installed at both ends of the vent holes 24. The vent membranes 25 block external impurities and contaminants, reducing the probability that external substances will enter the bearing sleeve 2 and rub against the balls 22, causing the balls 22 to wear.

[0036] Reference Figure 3 The inner wall of the bearing sleeve 2 has a circumferentially circumferentially formed limiting groove 27 communicating with the vent hole 24. A ring 26 is placed in the limiting groove 27. The ring 26 fits snugly against the inner wall of the bearing sleeve 2 and the bearing sleeve 2 itself, and is made of a deformable material, such as a nickel-titanium alloy. At room temperature, the ring 26 seals the vent hole 24, further reducing the probability of external impurities entering the bearing sleeve 2 and affecting the rolling of the balls 22. When relative rotation occurs between the bearing 1 and the bearing sleeve 2, the temperature inside the bearing sleeve 2 rises, and the ring 26 contracts, exposing the vent hole 24 to release pressure inside the bearing sleeve 2, balancing the internal and external pressures of the bearing sleeve 2, which helps improve the operational stability of the bearing 1 and the bearing sleeve 2.

[0037] Reference Figure 3 The receiving groove 23 slopes axially from the middle of the bearing sleeve 2 towards both ends, forming an inclined surface. This inclined surface guides the outer circle of the ring 26, facilitating the installation and removal of the ring 26 by operators and improving the ease of installation. The thickness of the ring 26 gradually decreases from the bearing sleeve 2 towards the bearing 1. By reducing the contact area with the bearing 1, the probability of friction between the ring 26 and the bearing 1 affecting the rotation of the bearing 1 is reduced, thus improving the rotational stability of the bearing 1.

[0038] Reference Figure 2 and Figure 3 A fixed groove 12 is provided circumferentially on the surface of the annular groove 11. The fixed groove 12 stores lubricating oil. During the rolling of the ball 22, the lubricating oil is coated onto the surface of the ball 22 along the surface of the fixed groove 12. During the rolling of the ball 22 along the annular groove 11 and the annular groove 21, the lubricating oil is coated onto the inner wall of the annular groove 11 and the annular groove 21, which reduces the probability of wear caused by friction between the ball 22 and the annular groove 11 and the annular groove 21, and helps to extend the service life of the bearing 1.

[0039] The implementation principle of a double-groove bearing 1 in this application embodiment is as follows: When the bearing 1 and the bearing sleeve 2 rotate relative to each other through the balls 22, the two annular grooves 11 and 21 cooperate to disperse the radial pressure on the bearing 1, reducing the stress borne by a single annular groove 11 and 21, and providing symmetrical guiding support surfaces for the balls 22, reducing the probability of irregular oscillation and shaking of the balls 22 under heavy load, which is beneficial to improving the strength and rigidity of the bearing 1 and the structure. At the same time, the vent hole 24 dissipates the heat generated inside the bearing sleeve 2 and disperses the pressure, reducing the probability of lubricating oil overflowing or the ring 26 dislodging from the receiving groove 23 due to excessive internal pressure, which is beneficial to improving the stability and load-bearing capacity of the bearing 1.

[0040] Example 2 The difference between this embodiment and embodiment 1 is that the bearing sleeve 2 does not have a vent hole 24.

[0041] Reference Figure 1 and Figure 5 Multiple pressure relief chambers 4 are provided inside the bearing sleeve 2, which are connected to the inside of the bearing sleeve 2. The pressure relief chambers 4 are connected to the limiting groove 27. When the bearing 1 rotates, the air pressure and temperature inside the bearing sleeve 2 increase, causing the smooth to contract. The pressure relief chambers 4 temporarily disperse the air pressure inside the bearing sleeve 2, which helps to reduce the air pressure inside the bearing sleeve 2. This reduces the probability of lubricating oil overflowing or the ring 26 detaching from the bearing sleeve 2 due to excessive pressure, thereby improving the working stability of the bearing 1 and the bearing sleeve 2.

[0042] Example 3 The difference between this embodiment and embodiment 1 is that the bearing sleeve 2 does not have isolation rings 3 at both ends along the axial direction.

[0043] Reference Figure 2 and Figure 5 A second isolation ring 5 is installed in the middle of the bearing sleeve 2. A second receiving groove is formed on the inner wall of the bearing sleeve 2 along the circumference. The second receiving groove is located between two second annular grooves 21 and is parallel to the two second annular grooves 21. The second isolation ring 5 is installed in the second receiving groove. On both sides of the second isolation ring 5 along the axial direction, there are second isolation grooves 51 and second buffer grooves 52 formed along the circumference. The second isolation grooves 51 uniformly isolate the rolling balls 22 in the corresponding first annular groove 11 and second annular groove 21. The second buffer grooves 52 provide buffer space for the movement of the rolling balls 22, which helps to improve the stability and safety of the rolling balls 22.

[0044] The above are all 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 double-groove bearing (1), comprising a bearing (1) and a bearing sleeve (2), characterized in that: The bearing (1) is located inside the bearing sleeve (2) and is coaxially arranged with the bearing sleeve (2). The outer wall of the bearing (1) has two annular grooves (11) circumferentially. The inner wall of the bearing sleeve (2) has two annular grooves (21) corresponding to the annular grooves (11) circumferentially. Several balls (22) are arranged circumferentially in the annular grooves (21). The balls (22) are located between the annular grooves (11) and the annular grooves (21) and are in rolling contact with the inner walls of the annular grooves (11) and the annular grooves (21). Two isolation rings (3) for isolating the balls (22) are detachably connected to both sides of the inner wall of the bearing sleeve (2) along its own axis. The inner wall of the bearing sleeve (2) has a receiving groove (23) adapted to the isolation rings circumferentially. The isolation rings (3) are located in the receiving grooves. The bearing sleeve (2) is fitted into the first (23) and the inner wall of the bearing sleeve (2) has several vent holes (24) in the radial direction. One end of the vent hole (24) is connected to the outside and the other end is connected to the inside of the bearing sleeve (2). The inner walls of the bearing sleeve (2) along the axial direction have circumferentially locating grooves (27). The locating groove (27) is located on the side of the annular groove (21) away from the middle part of the bearing sleeve (2). The locating groove (27) is connected to the vent hole (24). A ring (26) is placed in the locating groove (27). The ring (26) is made of deformable material. The ring (26) is in an expanded state at room temperature and blocks the vent hole (24). When heated, it shrinks. At this time, the thickness of the ring (26) is smaller than the diameter of the vent hole (24) and contacts the outer wall of the bearing (1).

2. The double-groove bearing (1) according to claim 1, characterized in that: The isolation ring (3) has several isolation grooves (31) adapted to the ball (22) along the circumferential direction, and several buffer grooves (32) are provided between adjacent isolation grooves (31).

3. The double-groove bearing (1) according to claim 1, characterized in that: The annular groove (11) has a fixed groove (12) along its circumference, and the fixed groove (12) contains lubricating oil.

4. A double-groove bearing (1) according to claim 1, characterized in that: The two ends of the vent (24) are covered with a breathable membrane (25).

5. A double-groove bearing (1) according to claim 1, characterized in that: The inner wall of the receiving groove (23) on the side away from the middle part of the bearing sleeve (2) is inclined from both ends of the bearing sleeve (2).

6. A double-groove bearing (1) according to claim 1, characterized in that: The thickness of the ring (26) gradually decreases from the bearing sleeve (2) toward the bearing (1).

7. A double-groove bearing (1) according to claim 1, characterized in that: The bearing sleeve (2) has a pressure relief cavity (4) that communicates with the inside of the bearing sleeve (2).

8. A dual channel bearing (1) according to claim 1, characterized in that: The bearing sleeve (2) has an isolation ring (5) in the middle of its inner wall. The isolation ring (5) has an isolation groove (51) and a buffer groove (52) on both sides along its own axis direction, which are adapted to the ball (22).

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