A deep groove ball bearing

Abstract

The present invention relates to the field of bearing technology, and discloses a ball deep groove bearing, comprising a bearing outer ring and a bearing inner ring inside the bearing outer ring, a limiting ring groove is provided between the bearing outer ring and the bearing inner ring, balls are arranged inside the limiting ring groove, connecting structures are installed on both sides of the balls, the inside of the connecting structure has a ball limiting structure in an annular array, two ball limiting structures are used to be sleeved on both sides of the balls, the connecting structure comprises a first connecting frame, a second connecting frame, an arc-shaped inner cavity, a first inclined groove, a second inclined groove, a fixed circular groove and a limiting slide groove, and an arc-shaped inner cavity is provided inside the first connecting frame. The present invention utilizes centrifugal force to make the fixed structure inside the storage shell break away from the fixed state, release the locking effect on the mating shaft body, so that the device can complete the fixing and separation operations of the connecting structure by rotation and centrifugal action, which greatly improves the convenience of use of the device and the scope of application.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, in particular to a ball deep groove bearing. Background Art

[0002] Bearings are an important part of modern mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. The main function of bearings is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. It can be understood that it is used to fix the shaft so that it can only rotate, while controlling its axial and radial movement. If the shaft does not have a bearing, it will not work at all, because the shaft may move in any direction, but the shaft is required to only rotate during operation.

[0003] However, when existing bearings are used in some large equipment and harsh scenarios, the large equipment has a greater gravity, so the required bearing volume is larger. However, when the bearing volume becomes larger, the retaining ring in the middle is more difficult to install during installation compared with the conventional bearing volume, which affects the subsequent installation steps. In serious cases, it will also affect the support condition of the ball. Summary of the invention

[0004] The present invention provides a ball deep groove bearing having the beneficial effect of quick installation of a retaining ring, and solves the problem mentioned in the above background technology that the existing bearings, when dealing with some large equipment and harsh scenes, have a larger gravity due to the large equipment, and the required bearing volume is also larger, but when the bearing volume becomes larger, the retaining ring in the middle is more difficult to install during installation compared with the conventional bearing volume, thereby affecting the subsequent installation steps, and in serious cases, it will also affect the support condition of the ball.

[0005] The present invention provides the following technical solution: A ball deep groove bearing comprises a bearing outer ring and a bearing inner ring inside the bearing outer ring, a limiting ring groove is provided between the bearing outer ring and the bearing inner ring, balls are arranged inside the limiting ring groove, connecting structures are installed on both sides of the balls, the inside of the connecting structure has a ball limiting structure in an annular array, two ball limiting structures are used to be sleeved on both sides of the balls, the connecting structure comprises a first connecting frame, a second connecting frame, an arc-shaped inner cavity, a first inclined groove, a second inclined groove, a fixed circular groove and a limiting slide groove, the first connecting frame is provided with an arc-shaped inner cavity, one side of the arc-shaped inner cavity is provided with a first inclined groove, the other side of the arc-shaped inner cavity is provided with a second inclined groove, one end of the first inclined groove is provided with a limiting slide groove located in the first connecting frame, the limiting slide groove is connected with one end of the first inclined groove and the second inclined groove, one side of the limiting slide groove is provided with a fixed circular groove located in the first connecting frame, the second connecting frame is installed on one side of the first connecting frame, a support rod body is provided on one side of the second connecting frame, and a matching shaft body is provided at one end of the support rod body.

[0006] As an optional solution for the ball deep groove bearing described in the present invention, wherein: a limiting fixed structure is installed inside the limiting slide groove, and the limiting fixed structure includes a bow-shaped slide, a limiting movable block and a limiting block. A limiting movable block is installed at the upper end of the bow-shaped slide, and a limiting block is provided on one side of the inner wall of the bow-shaped slide. The connecting structure also includes a placement groove, which is located at one end of the limiting slide groove, and a spring sheet is installed inside the placement groove, and the spring sheet is used to provide thrust for the bow-shaped slide.

[0007] As an optional solution for the ball deep groove bearing described in the present invention, the limiting fixing structure also includes a storage shell, a gravity block and an arc-shaped limiting groove, the interior of the storage shell is provided with a cavity, the interior of the cavity is provided with a gravity block located at the upper end of the limiting movable block, and one side of the limiting movable block is provided with an arc-shaped limiting groove.

[0008] As an optional solution for the ball deep groove bearing described in the present invention, wherein: a connecting groove is provided inside the gravity block, a locking structure is installed on the other side of the second connecting frame, the locking structure includes a plug-in rod and a friction strip, a friction strip is installed on the outer side of the plug-in rod, the friction strip is made of soft rubber, the plug-in rod is used to be inserted into the connecting groove, and the friction strip is used to increase the friction between the plug-in rod and the connecting groove.

[0009] As an optional solution for the ball deep groove bearing described in the present invention, the ball limiting structure includes a ball sleeve, a middle-layer guide channel, a lower-layer guide channel and an upper-layer guide groove, the inner wall of the ball sleeve is provided with a middle-layer guide channel, the upper end of the middle-layer guide channel is provided with an upper-layer guide groove located on the inner wall of the ball sleeve, and the lower end of the middle-layer guide channel is provided with a lower-layer guide channel located on the inner wall of the ball sleeve.

[0010] As an optional solution of the ball deep groove bearing of the present invention, the inner wall of the ball sleeve is also provided with a through channel, which is used to connect the upper guide groove with the ball sleeve and the middle guide channel.

[0011] As an optional solution for the ball deep groove bearing described in the present invention, the ball limiting structure also includes an oil delivery channel, the inner wall of one end of the middle-layer guide channel is provided with an oil delivery channel, the first connecting frame is also equipped with an oil storage structure, the oil storage structure includes a storage cavity and a connecting guide channel, the inner wall of the storage cavity is provided with a sealing rubber pad, and one end of the connecting guide channel is used to communicate with the sealing rubber pad.

[0012] As an optional solution of the ball deep groove bearing described in the present invention, the oil storage structure also includes a sealing rubber pad, and a sealing rubber pad is installed on the upper end of the inner wall of the storage cavity, and the sealing rubber pad is used to increase the sealing performance inside the storage cavity.

[0013] As an optional solution for the ball deep groove bearing of the present invention, the outer surface of one end of the ball sleeve is symmetrically provided with arc grooves, and a sealing strip is installed inside the arc groove, and the sealing strip is used to increase the sealing performance of the two ball sleeves.

[0014] As an optional solution of the ball deep groove bearing of the present invention, a contact ring is installed on the upper end of the inner wall of the ball sleeve, and a fitting surface layer is arranged on the outer surface of the contact ring.

[0015] The present invention has the following beneficial effects:

[0016] 1. When installing the ball deep groove bearing, the connecting structure is to rotate the second connecting frame so that the matching shaft body is stuck into the fixed circular groove along the trajectory of the first inclined groove, and at the same time, the limiting movable block is used to limit it, thereby completing the fixation of the matching shaft body and the locking state of the first connecting frame and the second connecting frame. The device adopts a rotating fixing method to complete the fixing operation of the first connecting frame and the second connecting frame, which is convenient for the installation of the ball and the limiting effect. When disassembling, the centrifugal force is used to make the fixed structure inside the storage shell break away from the fixed state, and the locking effect on the matching shaft body is released, so that the device can complete the fixing and separation operations of the connecting structure by rotating and centrifugal actions, which greatly improves the convenience of use of the device and the scope of application.

[0017] 2. The ball deep groove bearing provides lubricating medium between the ball and the outer ring and inner ring of the bearing through the cooperation of the internal structure of the ball limit structure, reduces the friction between the ball and the inner wall of the outer ring and inner ring of the bearing, and prolongs the fatigue life: the rolling fatigue life of the bearing is extended if the rolling contact surface is well lubricated during rotation. On the contrary, it is shortened if the oil viscosity is low and the lubricating oil film thickness is not good. It can also achieve rust-proof treatment for the balls inside the outer ring and the inner ring of the bearing, prevent foreign matter from invading the interior of the bearing, or prevent corrosion, greatly increase the working life of the ball and the smoothness of the outer ring of the bearing during operation.

[0018] 3. The ball deep groove bearing forms a closed space between the outer surface of the ball and the inner wall of the ball sleeve through the cooperation of the sealing strip and the fitting surface layer, and the fitting surface layer will always clean the outer surface of the contact ring, which can prevent external impurities from entering between the ball and the ball sleeve and causing surface damage, affecting the rolling smoothness of the ball, and can limit the oil on the inner wall of the ball sleeve to avoid oil leakage and affect the lubrication effect, so that the device as a whole can achieve dust prevention of the ball and lubrication effect inside the ball sleeve when supporting heavy objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the connection structure and ball limiting structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the bow-shaped slide structure of the present invention.

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the local structure at point A.

[0023] Figure 5 For the present invention Figure 1 Schematic diagram of the local structure at location B.

[0024] Figure 6 It is a schematic diagram of the interior of the ball sleeve of the present invention.

[0025] Figure 7 This is a schematic diagram of the installation position of the oil storage structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the interior of the storage cavity of the present invention.

[0027] Fig. 9 It is a schematic diagram of the planar structure of the arc-shaped inner cavity of the present invention.

[0028] In the figure: 1, outer ring of bearing; 2, connecting structure; 21, first connecting frame; 22, second connecting frame; 23, arc-shaped inner cavity; 24, first inclined groove; 25, second inclined groove; 26, placement groove; 27, fixed circular groove; 28, spring piece; 29, limit slide groove; 3, ball limit structure; 31, ball sliding sleeve; 32, middle guide channel; 33, lower guide channel; 34, through channel; 35, oil delivery channel; 36, contact ring; 37, fitting surface layer; 38, arc-shaped groove; 39, sealing strip ; 40. Upper guide groove; 4. Limit fixing structure; 41. Bow-shaped slide; 42. Storage shell; 43. Limit movable block; 44. Limit block; 45. Gravity block; 46. Connecting groove; 47. Arc-shaped limit groove; 5. Locking structure; 51. Plug-in rod; 52. Friction rubber strip; 6. Oil storage structure; 61. Storage cavity; 62. Connecting guide channel; 63. Sealing rubber pad; 7. Bearing inner ring; 8. Limit ring groove; 9. Ball; 10. Matching shaft; 11. Support rod body. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on 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.

[0030] Example 1, please refer to Figure 1-Figure 9 A ball deep groove bearing includes a bearing outer ring 1 and a bearing inner ring 7 inside the bearing outer ring 1, a limiting ring groove 8 is provided between the bearing outer ring 1 and the bearing inner ring 7, balls 9 are arranged inside the limiting ring groove 8, connecting structures 2 are installed on both sides of the balls 9, and the connecting structure 2 has a ball limiting structure 3 in an annular array inside, and the two ball limiting structures 3 are used to be sleeved on both sides of the balls 9, and the connecting structure 2 includes a first connecting frame 21, a second connecting frame 22, an arc-shaped inner cavity 23, a first inclined groove 24, a second inclined groove 25, a fixed circular groove 27 and a limiting slide groove 29, and the first connecting frame 21 has a An arc-shaped inner cavity 23 is provided inside, a first inclined groove 24 is provided on one side of the arc-shaped inner cavity 23, a second inclined groove 25 is provided on the other side of the arc-shaped inner cavity 23, a limiting slide groove 29 located in the first connecting frame 21 is provided at one end of the first inclined groove 24, the limiting slide groove 29 is connected with one end of the first inclined groove 24 and the second inclined groove 25, a fixed circular groove 27 located in the first connecting frame 21 is provided on one side of the limiting slide groove 29, a second connecting frame 22 is installed on one side of the first connecting frame 21, a support rod body 11 is provided on one side of the second connecting frame 22, and a matching shaft body 10 is provided at one end of the support rod body 11;

[0031] A limited fixed structure 4 is installed inside the limited slide groove 29, and the limited fixed structure 4 includes a bow-shaped slide 41, a limited movable block 43 and a limited block 44. The limited movable block 43 is installed at the upper end of the bow-shaped slide 41, and a limited block 44 is provided on one side of the inner wall of the bow-shaped slide 41. The connecting structure 2 also includes a placement groove 26, which is located at one end of the limited slide groove 29. A spring 28 is installed inside the placement groove 26, and the spring 28 is used to provide thrust for the bow-shaped slide 41.

[0032] The position-limiting fixing structure 4 further includes a storage shell 42, a gravity block 45 and an arc-shaped position-limiting groove 47. A cavity is provided inside the storage shell 42. A gravity block 45 is provided inside the cavity and is located at the upper end of the position-limiting movable block 43. An arc-shaped position-limiting groove 47 is provided on one side of the position-limiting movable block 43.

[0033] A connecting groove 46 is provided inside the gravity block 45, and a locking structure 5 is installed on the other side of the second connecting frame 22. The locking structure 5 includes a plug-in rod 51 and a friction rubber strip 52. The friction rubber strip 52 is installed on the outer side of the plug-in rod 51. The friction rubber strip 52 is made of soft rubber. The plug-in rod 51 is used to be inserted into the connecting groove 46, and the friction rubber strip 52 is used to increase the friction between the plug-in rod 51 and the connecting groove 46.

[0034] The ball bearing 9 is placed at the corresponding position between the first connecting frame 21 and the second connecting frame 22, and the first connecting frame 21 and the second connecting frame 22 are installed correspondingly, so that one end of the matching shaft body 10 extends from the inside of the first inclined groove 24, and slides along the trajectory of the first inclined groove 24 into the bow-shaped slide 41 located in the limiting slide groove 29. When the matching shaft body 10 moves obliquely inside the first inclined groove 24, the second connecting frame 22 will be in a rotating state. When the matching shaft body 10 reaches the position of the limiting slide groove 29, the second connecting frame 22 is rotated again, so that the upper end of the matching shaft body 10 contacts the limiting movable block 43 and pushes the bow-shaped slide 41 to slide as a whole inside the limiting slide groove 29. When the matching shaft body 10 moves to the position of the fixed circular groove 27, the bow-shaped slide 41 is located at one end position inside the limiting slide groove 29. When the matching shaft body 10 slides to the limiting slide groove 29 position, the ball limiting structures 3 inside the first connecting frame 21 and the second connecting frame 22 are in a dislocated state, and there is a gap between the first connecting frame 21 and the second connecting frame 22, and then the second connecting frame 22 is pushed toward the first connecting frame 21, so that the first connecting frame 21 and the second connecting frame 22 are completely fitted, and the mating shaft body 10 is stuck in the interior of the fixed circular groove 27, at this time, the spring piece 28 pushes the bow slide 41 to rebound so that the limiting movable block 43 moves to the initial position, and at the same time, the arc-shaped limiting groove 47 fits with the outer surface of the mating shaft body 10, and the arc-shaped limiting groove 47 cooperates with the fixed circular groove 27 to lock the upper end of the mating shaft body 10 in the interior of the fixed circular groove 27, and the function of the fixed circular groove 27 is to achieve a limiting and fixing effect, thereby realizing the limiting of the mating shaft body 10 and the fixed installation of the first connecting frame 21 and the second connecting frame 22;

[0035] After the fixation is completed, the plug rod 51 is inserted into the second connecting frame 22 from one side of the second connecting frame 22, and one end of the plug rod 51 extends to the inside of the connecting groove 46, and the friction strip 52 is used to increase the friction between the plug rod 51 and the connecting groove 46, so that one end of the plug rod 51 and the connecting groove 46 are engaged with each other, thereby preventing the centrifugal force of the connecting groove 46 from causing the gravity block 45 to shake when the bearing outer ring 1 rotates, thereby affecting the fixing effect of the mating shaft body 10;

[0036] When the first connecting frame 21 and the second connecting frame 22 are disassembled, it is necessary to pull out the connecting rod 51 so that the connecting rod 51 is separated from the inside of the connecting groove 46, so that the gravity block 45 has the conditions for moving up and down. At this time, the first connecting frame 21 and the second connecting frame 22 are placed flat and rotated. The centrifugal force generated during the rotation is used to swing the gravity block 45 outward from the outside of the rotation axis of the first connecting frame 21 and the second connecting frame 22. At the same time, the limiting movable block 43 is pulled to slide toward the top of the storage shell 42, and the lower end of the limiting movable block 43 is separated from the fixed environment formed by the fixed circular groove 27, so that the matching shaft body 10 lacks the limiting structure, and then the second connecting frame 22 is pulled in the opposite direction of the first connecting frame 21 to form a gap between the first connecting frame 21 and the second connecting frame 22, and then the second connecting frame 22 is rotated in the opposite direction to allow the matching shaft body 10 to slide out along the trajectory of the second inclined groove 25, thereby completing the fixation of the first connecting frame 21 and the second connecting frame 22 and facilitating disassembly.

[0037] Example 2: This example is an improvement made on the basis of Example 1. For details, please refer to Figure 1-Figure 9 The ball limiting structure 3 includes a ball sleeve 31, a middle guide channel 32, a lower guide channel 33 and an upper guide groove 40. The inner wall of the ball sleeve 31 is provided with a middle guide channel 32, the upper end of the middle guide channel 32 is provided with an upper guide groove 40 located on the inner wall of the ball sleeve 31, and the lower end of the middle guide channel 32 is provided with a lower guide channel 33 located on the inner wall of the ball sleeve 31;

[0038] The inner wall of the ball bearing sleeve 31 is also provided with a through channel 34, and the through channel 34 is used to connect the upper guide groove 40 with the ball bearing sleeve 31 and the middle guide channel 32;

[0039] The ball limiting structure 3 also includes an oil delivery channel 35, and the inner wall of one end of the middle-layer flow guide channel 32 is provided with an oil delivery channel 35. The first connecting frame 21 is also equipped with an oil storage structure 6, and the oil storage structure 6 includes a storage cavity 61 and a connecting flow guide channel 62. The inner wall of the storage cavity 61 is provided with a sealing rubber pad 63, and one end of the connecting flow guide channel 62 is used to communicate with the sealing rubber pad 63;

[0040] The oil storage structure 6 also includes a sealing rubber pad 63 . The upper end of the inner wall of the storage cavity 61 is installed with the sealing rubber pad 63 . The sealing rubber pad 63 is used to increase the sealing performance inside the storage cavity 61 .

[0041] When the ball 9 is supporting a heavy object, it is in contact with the inner wall of the bearing outer ring 1 and the bearing inner ring 7 for a long time, and lacks a lubricating medium, which will cause rapid wear of the ball 9, causing the ball 9 to roll less smoothly, greatly reducing its service life;

[0042] By filling the storage cavity 61 with oil, and through the cooperation of the connecting guide channel 62 and the oil delivery channel 35, the oil is transported to the interior of the middle-layer guide channel 32, and then through the through channel 34, the oil is transported to the interior of the lower-layer guide channel 33 and the upper-layer guide groove 40, thereby increasing the contact range with the outer surface of the ball 9. When the ball 9 rolls inside the first connecting frame 21, the outer surface of the ball 9 fits against the inner wall of the ball sleeve 31, and contacts with the oil inside the middle-layer guide channel 32, the lower-layer guide channel 33 and the upper-layer guide groove 40, and is smeared on the outer surface of the ball 9 through the rolling of the ball 9 itself. When the oil fills the middle-layer guide channel 32 too much, it will flow back to the storage cavity 61 for storage, and flow into the middle-layer guide channel 32 again after it is used up.

[0043] Example 3: This example is an improvement made on the basis of Example 2. For details, please refer to Figure 1-Figure 9 The outer surface of one end of the ball sleeve 31 is symmetrically provided with an arc groove 38 , and a sealing strip 39 is installed inside the arc groove 38 . The sealing strip 39 is used to increase the sealing performance of the two ball sleeves 31 .

[0044] A contact ring 36 is installed at the upper end of the inner wall of the ball sliding sleeve 31 , and the outer surface of the contact ring 36 is arranged with a bonding surface layer 37 .

[0045] When the two ball sleeves 31 fit together, by placing the sealing strip 39 inside the arc groove 38, when the two ball sleeves 31 fit together, the sealing strip 39 is stuck between the two arc grooves 38, and the sealing effect is achieved on the connection part of the two ball sleeves 31. At the same time, when the ball 9 is located inside the ball sleeve 31, it will fit with the outer surface of the contact ring 36 and the fitting surface layer 37. When the ball 9 is rolling, the fitting surface layer 37 will always clean the outer surface of the ball 9 to prevent impurities from entering between the outer surface of the ball 9 and the inner wall of the ball sleeve 31, causing damage to the outer surfaces of both and affecting the sliding smoothness, thereby forming a sealed space between the outer surface of the ball 9 and the inner wall of the ball sleeve 31 to prevent external structures from entering therein, and achieving the functions of cleaning the outer surface of the ball 9 and preventing impurities from entering.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A ball deep groove bearing, comprising a bearing outer ring (1) and a bearing inner ring (7) inside the bearing outer ring (1), a limiting ring groove (8) being provided between the bearing outer ring (1) and the bearing inner ring (7), balls (9) being arranged inside the limiting ring groove (8), connecting structures (2) being installed on both sides of the balls (9), ball limiting structures (3) being provided in an annular array inside the connecting structure (2), two ball limiting structures (3) being used to be sleeved on both sides of the balls (9), characterized in that: The connecting structure (2) comprises a first connecting frame (21), a second connecting frame (22), an arc-shaped inner cavity (23), a first inclined groove (24), a second inclined groove (25), a fixed circular groove (27) and a limiting sliding groove (29); the first connecting frame (21) is provided with an arc-shaped inner cavity (23); one side of the arc-shaped inner cavity (23) is provided with a first inclined groove (24); the other side of the arc-shaped inner cavity (23) is provided with a second inclined groove (25); one end of the first inclined groove (24) is provided with A limiting slide groove (29) is located in the first connecting frame (21), the limiting slide groove (29) is connected to the first inclined groove (24) and one end of the second inclined groove (25), one side of the limiting slide groove (29) is provided with a fixed circular groove (27) located in the first connecting frame (21), one side of the first connecting frame (21) is mounted with a second connecting frame (22), one side of the second connecting frame (22) is provided with a support rod body (11), and one end of the support rod body (11) is provided with a matching shaft body (10).

2. The ball deep groove bearing according to claim 1, characterized in that: A limit fixing structure (4) is installed inside the limit sliding groove (29), and the limit fixing structure (4) includes a bow-shaped slide (41), a limit movable block (43) and a limit block (44). The limit movable block (43) is installed at the upper end of the bow-shaped slide (41), and a limit block (44) is provided on one side of the inner wall of the bow-shaped slide (41). The connecting structure (2) also includes a placement groove (26), and the placement groove (26) is located at one end of the limit sliding groove (29). A spring piece (28) is installed inside the placement groove (26), and the spring piece (28) is used to provide thrust for the bow-shaped slide (41).

3. The ball deep groove bearing according to claim 2, characterized in that: The position-limiting fixing structure (4) further comprises a storage shell (42), a gravity block (45) and an arc-shaped position-limiting groove (47); a cavity is provided inside the storage shell (42); a gravity block (45) is provided inside the cavity and is located at the upper end of the position-limiting movable block (43); and an arc-shaped position-limiting groove (47) is provided on one side of the position-limiting movable block (43).

4. The ball deep groove bearing according to claim 3, characterized in that: The gravity block (45) is provided with a connection groove (46) inside, and a locking structure (5) is installed on the other side of the second connection frame (22). The locking structure (5) comprises a plug-in rod (51) and a friction rubber strip (52). The friction rubber strip (52) is installed on the outer side of the plug-in rod (51). The friction rubber strip (52) is made of soft rubber. The plug-in rod (51) is used to be inserted into the connection groove (46), and the friction rubber strip (52) is used to increase the friction between the plug-in rod (51) and the connection groove (46).

5. The ball deep groove bearing according to claim 4, characterized in that: The ball limiting structure (3) comprises a ball sleeve (31), a middle-layer flow guide channel (32), a lower-layer flow guide channel (33) and an upper-layer flow guide groove (40); the inner wall of the ball sleeve (31) is provided with a middle-layer flow guide channel (32); the upper end of the middle-layer flow guide channel (32) is provided with an upper-layer flow guide groove (40) located on the inner wall of the ball sleeve (31); and the lower end of the middle-layer flow guide channel (32) is provided with a lower-layer flow guide channel (33) located on the inner wall of the ball sleeve (31).

6. The ball deep groove bearing according to claim 5, characterized in that: The inner wall of the ball bearing sliding sleeve (31) is further provided with a through channel (34), and the through channel (34) is used to connect the upper guide groove (40) with the ball bearing sliding sleeve (31) and the middle guide channel (32).

7. The ball deep groove bearing according to claim 6, characterized in that: The ball limiting structure (3) further comprises an oil delivery channel (35), the inner wall of one end of the middle-layer flow guide channel (32) being provided with the oil delivery channel (35), the first connecting frame (21) further being provided with an oil storage structure (6), the oil storage structure (6) comprising a storage cavity (61) and a connecting flow guide channel (62), the inner wall of the storage cavity (61) being provided with a sealing rubber pad (63), and one end of the connecting flow guide channel (62) being used for communicating with the sealing rubber pad (63).

8. The ball deep groove bearing according to claim 7, characterized in that: The oil storage structure (6) further comprises a sealing rubber pad (63), and the sealing rubber pad (63) is installed on the upper end of the inner wall of the storage cavity (61), and the sealing rubber pad (63) is used to increase the sealing performance inside the storage cavity (61).

9. The ball deep groove bearing according to claim 8, characterized in that: The outer surface of one end of the ball sliding sleeve (31) is symmetrically provided with an arc groove (38), and a sealing strip (39) is installed inside the arc groove (38), and the sealing strip (39) is used to increase the sealing performance of the two ball sliding sleeves (31); A contact ring (36) is mounted on the upper end of the inner wall of the ball sliding sleeve (31), and a fitting surface layer (37) is arranged on the outer surface of the contact ring (36).

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