Ball bearing assembly

Abstract

The ball bearing assembly comprises a shell which is of a cylindrical structure, and the inner wall of the shell is connected with a coaxial limiting ring; the inner cylinder is nested in the shell and is coaxially arranged with the shell; the ball bearing is clamped between the limiting ring and the jacking and connected to the outer side of the inner cylinder in a sleeving mode, and the ball bearing structurally comprises an outer ring, a first channel is formed in the outer ring; a channel II opposite to the channel I is formed in the inner ring; the balls are connected into the first channel and the second channel in a rolling mode. The utility model has the advantages of compact and reasonable structure and convenience in operation, improves the axial pressure-bearing effect and the axial limiting effect through the nesting relation of the shell and the inner cylinder and the clamping effect of the ball bearing, and simultaneously reduces a lot of unnecessary parts, reduces the friction force, improves the rotating efficiency and reduces the cost due to the fact that only the balls are adopted for rotating transmission. Meanwhile, the stability is improved, the whole structure is not prone to damage, the service life is prolonged, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a ball bearing assembly. Background Art

[0002] In an adjustable screw pump device, in order to adjust the screw pump, the sucker rod needs to be pressure-limited and rotated at the same time. Usually, the limit of the sucker rod is generally achieved through a bearing pair, that is, a number of superimposed bearings are used to achieve the limit effect.

[0003] For example, Chinese patent CN117365388A discloses a downhole pump structure with a multi-section stopper, which discloses: the bearing assembly arranged outside the casing 119 includes a first bearing 110, a second bearing 112 and a third bearing 113, the sealing assembly includes a first seal 111 and a second seal 114, a sealing body 108 and a spacer 109, the first seal 111 is arranged between the first bearing 110 and the second bearing 112, and the second seal 114 is close to the third bearing 113, wherein the first bearing 110 and the third bearing 113 are both load-bearing bearings, and the second bearing 112 is a straightening bearing. The first seal 111 and the second seal 114 are preferably packing seals. The first bearing 110, the second bearing 112 and the third bearing 113 can support the rotation of the casing 119 and the joint 117, the sucker rod 103 and the adjusting rod 115 inside the casing 119, and are closed by the first cover 116 at the outermost second seal 114.

[0004] In the above patent, the pressure-limiting method is adopted to realize the pressure-limiting. In actual use, the effect of the pressure-limiting is limited. The pressure-limiting effect is positively correlated with the number of bearings. If the number of bearings is small, the pressure-limiting effect is poor and axial displacement is prone to occur. Although the pressure-limiting effect is good when the number of bearings is large, the rotation efficiency will decrease as the number of bearings increases, the wear rate will increase, and it is not easy to install. Once damaged, the maintenance cost is difficult to estimate.

[0005] For this purpose, we propose a ball bearing assembly. Utility Model Content

[0006] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a ball bearing assembly, which improves the axial pressure-bearing effect. At the same time, since only balls are used for rotational transmission, many unnecessary parts are reduced, friction is reduced, and rotation efficiency is improved.

[0007] The technical solution adopted by the utility model is as follows:

[0008] The ball bearing assembly includes:

[0009] The outer shell is in a cylindrical structure, and a coaxial limiting ring is connected to the inner wall;

[0010] An inner cylinder is nested in the outer shell and arranged coaxially with the outer shell, and a top support is connected to the outer wall of the upper end of the inner cylinder; and

[0011] The rotating pair is engaged between the limiting ring and the top support and sleeved on the outside of the inner cylinder. The structure of the rotating pair includes:

[0012] There are multiple outer rings which are stacked in the axial direction and have a channel 1 formed on the outer ring;

[0013] The number of inner rings corresponds to that of the outer rings, and the plurality of inner rings are concentrically nested in the outer ring, and the inner rings are provided with a channel 2 opposite to the channel 1;

[0014] There are multiple balls which are rollingly connected in channel one and channel two.

[0015] It is further characterized by:

[0016] The housing also includes a shell, and the shell and the limiting ring are integrally formed.

[0017] The inner cylinder also includes a cylinder body, and the inner cylinder and the top support are integrally formed.

[0018] The longitudinal sections of the channel 1 and the channel 2 are both arc-shaped structures, and the horizontal section of the arc-shaped structure is smaller than the vertical section.

[0019] The radius of the ball is between the vertical section and the horizontal section of the arc structure.

[0020] A connecting piece is also arranged between the rotating pair and the top support, and a bearing group is also arranged between the inner cylinder and the outer shell, and the lower end of the bearing group abuts against the connecting piece.

[0021] The width of the limiting ring is greater than the width of the rotating pair.

[0022] The beneficial effects of the utility model are as follows:

[0023] The utility model has a compact and reasonable structure and is easy to operate. Through the nesting relationship between the outer shell and the inner cylinder and the clamping action of the rotating pair, the axial pressure bearing effect and the axial limiting effect are improved. At the same time, since only balls are used for rotational transmission, many unnecessary parts are reduced, the friction force is reduced, the rotation efficiency is improved, and the stability is improved. The overall structure is not easy to be damaged, the service life is increased, and it is easy to assemble.

[0024] The utility model also includes the following effects:

[0025] 1. In the utility model, the longitudinal sections of channel 1 and channel 2 are both arc-shaped structures, and the horizontal section of the arc-shaped structure is smaller than the vertical section. Two adjacent channels 1 and two adjacent channels 2 form an annular channel, and the balls are arranged to roll in the annular channel, and the radius of the balls is between the vertical section and the horizontal section of the arc-shaped structure, so that the balls can be located in the annular channel, and at the same time, the annular channel is expanded in the horizontal plane, so that the inner ring and the outer ring can rotate relatively, and at the same time, the rotation efficiency is improved under the action of multiple balls.

[0026] 2. The assembly method is simple. First fix the outer shell, and then stack the outer ring, inner ring and ball in sequence. After they are placed to a certain height, put in the connector and bearing group, and then snap the inner tube into the outer shell and the rotating pair to achieve the installation of the entire bearing group. The entire installation process does not require any connection structure, which improves the installation efficiency and also improves the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is a structural schematic diagram of the shell in the utility model.

[0029] Figure 3 It is a structural schematic diagram of the inner cylinder in the utility model.

[0030] Figure 4 It is a structural schematic diagram of the rotating pair in the utility model.

[0031] Figure 5 for Figure 1 A partial enlarged view of part A in the middle.

[0032] Figure 6 It is a schematic diagram of the connection structure of the outer ring, the inner ring and the balls in the utility model.

[0033] in:

[0034] 100, outer shell; 200, inner cylinder; 300, rotating pair; 400, bearing group; 500, connecting piece;

[0035] 101. housing; 102. limiting ring;

[0036] 201, top support; 202, cylinder;

[0037] 301, outer ring; 302, inner ring; 303, ball; b, channel one; c, channel two. DETAILED DESCRIPTION

[0038] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0039] like Figure 1 As shown, the present embodiment discloses a ball bearing assembly, including a shell 100, an inner cylinder 200 and a rotating pair 300, and the rotating pair 300 includes a plurality of outer rings 301, inner rings 302 and balls 303. Through the nested relationship between the shell 100 and the inner cylinder 200, and the snap-fitting effect of the rotating pair 300, the axial pressure-bearing effect and the axial limiting effect are improved. At the same time, since only the balls 303 are used for rotational transmission, many unnecessary parts are reduced, friction is reduced, rotation efficiency is improved, and stability is improved. The overall structure is not easy to be damaged, the service life is improved, and assembly is convenient.

[0040] Each component is described in detail below.

[0041] like Figure 1 and Figure 2 As shown, the housing 100 in this embodiment is a cylindrical structure, and a coaxial limiting ring 102 is connected to the inner wall. The housing 100 also includes a shell 101, and the shell 101 and the limiting ring 102 are integrally formed to improve overall stability;

[0042] like Figure 3 As shown, the inner cylinder 200 in this embodiment is nested in the outer shell 100 and is arranged coaxially with the outer shell 100. A top support 201 is connected to the outer wall of the upper end of the inner cylinder 200. The inner cylinder 200 also includes a cylinder body 202, and the cylinder body 202 and the top support 201 are integrally formed to improve the overall stability.

[0043] like Figure 4 and Figure 6 As shown, the rotating pair 300 in this embodiment is engaged between the limit ring 102 and the top support 201, and is sleeved on the outside of the inner tube 200. The structure of the rotating pair 300 includes multiple outer rings 301, inner rings 302 and balls 303. The outer rings 301 and the inner rings 302 are nested inside and outside, and the balls 303 are rollingly connected between the outer rings 301 and the inner rings 302.

[0044] In this embodiment, the outer ring 301 is multiple and stacked in the axial direction, and a channel b is opened on the outer ring 301;

[0045] In this embodiment, the number of inner rings 302 corresponds to that of outer rings 301, and multiple inner rings 302 are concentrically nested in the outer ring 301, and a channel 2 c opposite to channel 1 b is opened on the inner ring 302;

[0046] The balls 303 in this embodiment are multiple in number and are rollingly connected in channel 1 b and channel 2 c.

[0047] like Figure 6As shown, in this embodiment, the longitudinal sections of channel 1 b and channel 2 c are both arc-shaped structures, and the horizontal section of the arc-shaped structure is smaller than the vertical section. Two adjacent channels 1 b and two adjacent channels 2 c form an annular channel, and the ball 303 is rollingly arranged in the annular channel, and the radius of the ball 303 is between the vertical section and the horizontal section of the arc-shaped structure, so that the ball 303 can be located in the annular channel, and at the same time, the annular channel is expanded in the horizontal plane, so that the inner ring 302 and the outer ring 301 can rotate relative to each other, and at the same time, the rotation efficiency is improved through the action of multiple balls 303.

[0048] In this embodiment, Figure 5 As shown, a connecting piece 500 is further provided between the rotating pair 300 and the top support 201, and a bearing group 400 is further provided between the inner cylinder 200 and the outer shell 100, and the lower end of the bearing group 400 abuts against the connecting piece 500, thereby further improving the stability of the inner cylinder 200, improving the rotation efficiency, and improving the connection effect between the rotating pair 300 and the inner cylinder 200.

[0049] In this embodiment, Figure 1 As shown, the width of the limiting ring 102 is greater than the width of the rotating pair 300, and can support multiple rotating pairs 300 to improve the axial pressure bearing effect.

[0050] When in use, the above structure is assembled, and the assembly method is simple. First, fix the outer shell 100, and then stack the outer ring 301, the inner ring 302 and the ball 303 in sequence. After they are placed to a certain height, put in the connecting piece and the bearing group 400, and then snap the inner cylinder 200 into the outer shell 100 and the rotating pair 300 to realize the installation of the entire bearing group. The entire installation process does not require any connecting structure, which improves the installation efficiency and also improves the overall stability.

[0051] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A ball bearing assembly, characterized in that: include: The outer shell (100) is in a cylindrical structure, and a coaxial limiting ring (102) is connected to the inner wall; An inner cylinder (200) is nested in the outer shell (100) and is coaxially arranged with the outer shell (100), and a top support (201) is connected to the outer wall of the upper end of the inner cylinder (200); and, The rotating pair (300) is engaged between the limiting ring (102) and the supporting bracket (201) and sleeved on the outside of the inner cylinder (200). The structure of the rotating pair (300) includes: The outer ring (301) is multiple and stacked in the axial direction; The number of inner rings (302) corresponds to that of the outer rings (301), and a plurality of inner rings (302) are concentrically nested in the outer ring (301); The balls (303) are multiple in number and are rollingly connected between the outer ring (301) and the inner ring (302).

2. The ball bearing assembly according to claim 1, wherein: The housing (100) further comprises a shell (101), and the shell (101) and the limiting ring (102) are integrally formed.

3. The ball bearing assembly according to claim 1, wherein: The inner cylinder (200) further comprises a cylinder body (202), and the cylinder body (202) and the top support (201) are integrally formed.

4. The ball bearing assembly according to claim 1, wherein: The outer ring (301) is provided with a channel 1 (b), and the inner ring (302) is provided with a channel 2 (c) opposite to the channel 1 (b). The longitudinal sections of the channel 1 (b) and the channel 2 (c) are both arc-shaped structures, and the horizontal section of the arc-shaped structure is smaller than the vertical section.

5. The ball bearing assembly according to claim 4, characterized in that: The rolling connection is in channel one (b) and channel two (c), and the radius of the ball (303) is between the vertical section and the horizontal section of the arc structure.

6. The ball bearing assembly according to claim 1, wherein: A connecting piece (500) is also provided between the rotating pair (300) and the top support (201), and a bearing group (400) is also provided between the inner cylinder (200) and the outer shell (100), and the lower end of the bearing group (400) abuts against the connecting piece (500).

7. The ball bearing assembly according to claim 1, wherein: The width of the limiting ring (102) is greater than the width of the rotating pair (300).

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