Asymmetric wide body deep groove ball bearing with sc oil seal

Abstract

The utility model discloses an asymmetric wide body deep groove ball bearing with SC oil seal, including the outer ring, the inner ring, the first annular channel on the outer ring with the second annular channel on the inner ring all are close to the right -hand end deviation setting of outer ring or the inner ring, the first annular channel with the second annular channel between through the crown nylon retainer is installed steel ball, the left side of crown nylon retainer is provided with SC oil seal, the opening of crown nylon retainer is towards SC oil seal setting, the right side of steel ball is open setting. The channel of the inner ring and the outer ring of bearing is designed to be offset, which provides a reasonable axial installation space for the installation of the SC oil seal, so that the SC oil seal can better fit and play a role. The opening of the crown nylon retainer is set towards the SC oil seal. This design is helpful to reduce the friction between the crown nylon retainer and the steel ball, and improve the running stability of the crown nylon retainer.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to an asymmetric wide-body deep groove ball bearing with SC oil seal. Background Technology

[0002] In the field of mechanical transmission, sealed deep groove ball bearings are widely used as core components in automobiles, motors, wind power, and other equipment. Taking the 6202 type sealed deep groove ball bearing as an example, its traditional design suffers from the following technical bottlenecks;

[0003] 1. In the traditional symmetrical raceway structure of the 6202 deep groove ball bearing, the installation of the oil seal requires the axial space of the steel ball bearing area, which leads to a limited raceway width, a surge in steel ball contact stress, and a shortened fatigue life.

[0004] 2. The direction of the cage opening conflicts with the position of the oil seal, which obstructs the lubricating oil path and increases the coefficient of friction between the cage and the steel ball;

[0005] Therefore, this application provides an asymmetric wide-body deep groove ball bearing with SC oil seal to meet the requirements. Utility Model Content

[0006] The purpose of this application is to provide an asymmetric wide-body deep groove ball bearing with an SC oil seal to solve the technical problems mentioned in the background above.

[0007] To achieve the above objectives, this application provides the following technical solution: an asymmetric wide-body deep groove ball bearing with an SC oil seal, comprising an outer ring and an inner ring, wherein a first annular groove on the outer ring and a second annular groove on the inner ring are both offset close to the right end of the outer ring or the inner ring.

[0008] A steel ball is installed between the first annular groove and the second annular groove via a crown-shaped nylon retainer. An SC oil seal is provided on the left side of the crown-shaped nylon retainer, and the opening of the crown-shaped nylon retainer faces the SC oil seal.

[0009] The right side of the steel ball is open.

[0010] In a preferred embodiment of this invention, multiple sets of openings are arranged circumferentially on the edges of both the first and second annular channels. These openings are inclined and communicate with the inner cavity of the channels.

[0011] Both the first annular channel and the second annular channel have installation gaps between themselves and the steel ball;

[0012] The ends of the multiple openings near the steel ball are all located within the installation gap.

[0013] In a preferred embodiment of this invention, the cross-section of the opening is set to V-shape, and the tip of the opening is set downwards.

[0014] In a preferred embodiment of this invention, the bottom arc radius of the first annular channel is set to 3.15±0.05mm, and the bottom arc radius of the second annular channel is set to 3.06±0.05mm.

[0015] As a preferred embodiment of this invention, the crown-shaped nylon retainer is made of 25% glass fiber reinforced PA66 material.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] 1. This utility model has a reasonable structure. The inner and outer rings of the bearing are designed with offset grooves, which are offset to the non-sealing side, leaving enough space on the other side for the installation of the SC oil seal. This design provides reasonable axial installation space for the SC oil seal, so that the SC oil seal can fit better and play its role.

[0018] The opening of the crown nylon cage faces the SC oil seal. This design helps to reduce the friction between the crown nylon cage and the steel ball, improves the operational stability of the crown nylon cage, and makes the fit with the SC oil seal more coordinated. This further optimizes the stress and movement inside the bearing and improves the overall performance of the bearing.

[0019] 2. In this utility model, multiple sets of openings are arranged circumferentially on the edges of the first and second annular channels. The openings on both sides form symmetrical lubrication channels, so that the lubricating oil is evenly distributed circumferentially in the channel. The openings on both sides promote the formation of air convection circulation in the channel, improving the heat dissipation effect. The opening area is reserved for thermal expansion space to avoid the components from jamming at high temperature. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any effort in developing the invention.

[0021] Figure 1 This is a side view sectional structural diagram of the present invention;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of the central part of the structure;

[0023] Figure 3 for Figure 1 Schematic diagram of the middle and outer ring structure;

[0024] Figure 4 for Figure 1 Schematic diagram of the inner ring structure.

[0025] In the diagram: 1. Outer ring; 2. Inner ring; 3. Crown-shaped nylon retainer; 4. Steel ball; 5. SC oil seal; 6. First annular groove; 7. Second annular groove; 8. Opening; 9. Installation gap. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making inventive efforts are within the protection scope of the present utility model.

[0027] Example: Reference Figure 1 The asymmetric wide-body deep groove ball bearing with SC oil seal shown includes an outer ring 1 and an inner ring 2. The first annular groove 6 on the outer ring 1 and the second annular groove 7 on the inner ring 2 are both offset close to the right end of the outer ring 1 or the inner ring 2. The grooves of the inner ring 2 and the outer ring 1 of the bearing are offset to the non-sealing side, leaving enough space on the other side for the installation of the SC oil seal. This design provides reasonable axial installation space for the SC oil seal, so that the SC oil seal can fit better and play its role, while avoiding encroachment on the load-bearing area of ​​the groove and not affecting the overall structure and performance of the bearing.

[0028] Steel balls 4 are installed between the first annular groove 6 and the second annular groove 7 via a crown-shaped nylon cage 3. An SC oil seal 5 is provided on the left side of the crown-shaped nylon cage 3, with the opening of the crown-shaped nylon cage 3 facing the SC oil seal. This design helps to reduce the friction between the crown-shaped nylon cage and the steel balls 4, improve the operational stability of the crown-shaped nylon cage 3, and make the cooperation with the SC oil seal more coordinated, further optimizing the internal force and movement of the bearing and improving the overall performance of the bearing.

[0029] The right side of the steel ball 4 is open (i.e., the right side is not sealed), which allows lubricating oil to smoothly enter the bearing from the open part for lubrication, ensuring good lubrication of the bearing during operation.

[0030] It is important to note that the grooves of the outer ring 1 and the inner ring 2 are offset by 0.8mm to the non-sealing side, leaving 4.2mm of axial space for the SC oil seal 5, ensuring an interference fit of 0.3mm for the sealing lip, which can reduce the leakage rate from 15% to 2%.

[0031] As a preferred embodiment of this example, the bottom arc radius of the first annular channel 6 is set to 3.15±0.05mm, and the bottom arc radius of the second annular channel 7 is set to 3.06±0.05mm.

[0032] For the first annular groove 6 and the second annular groove 7, when the radius of the bottom arc is too small, the contact area is reduced by more than 20%, the surface contact stress increases by 30% to 40%, and the raceway shows plow-groove wear, which greatly reduces the service life of the bearing.

[0033] When the radius of the groove bottom ring is too large, the contact angle deviation between the rolling element and the raceway exceeds 2°, resulting in a 35% decrease in axial load capacity; at the same time, the thickness of the lubricating oil film decreases by 40%, and the duration of boundary lubrication state increases;

[0034] Therefore, the optimal effect is achieved when the bottom arc radius of the first annular channel 6 and the second annular channel 7 is set within this range.

[0035] As a preferred embodiment of this example, Figure 2-4 As shown, multiple sets of openings 8 are arranged circumferentially on the edges of the first annular channel 6 and the second annular channel 7. The multiple sets of openings 8 are arranged at an angle and are connected to the inner cavity of the channel.

[0036] An installation gap 9 is provided between the first annular channel 6 and the second annular channel 7 and the steel ball 4.

[0037] The ends of the multiple openings 8 near the steel ball 4 are all located within the installation gap 9.

[0038] The double-sided openings 8 form symmetrical lubrication channels, allowing the lubricating oil to be evenly distributed circumferentially within the channels; the double-sided openings 8 promote air convection circulation within the channels, improving heat dissipation; the opening 8 area is reserved for thermal expansion space to prevent components from seizing up at high temperatures.

[0039] The multiple openings 8 are located at the end of the steel ball 4 near the installation gap 9 (the groove surface corresponding to this installation gap 9 does not contact the outer surface of the steel ball 4), so that the setting of the openings 8 does not affect the movement of the steel ball 4 in the groove.

[0040] As a preferred embodiment of this example, Figure 2 and Figure 3 As shown, the cross-section of opening 8 is set in a V shape, with the tip of opening 8 facing downwards.

[0041] The V-shaped pointed bottom design distributes stress evenly along the inclined surface, preventing a sudden increase in stress at the tip and extending the bearing's service life.

[0042] As a preferred embodiment of this example, the crown-shaped nylon retainer 3 is made of 25% glass fiber reinforced PA66 material.

[0043] This significantly improves the mechanical properties of the crown-shaped nylon cage 3.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An asymmetric wide-body deep groove ball bearing with an SC oil seal, characterized in that: It includes an outer ring (1) and an inner ring (2). The first annular groove (6) on the outer ring (1) and the second annular groove (7) on the inner ring (2) are both offset close to the right end of the outer ring (1) or the inner ring (2). A steel ball (4) is installed between the first annular channel (6) and the second annular channel (7) through a crown-shaped nylon retainer (3). An SC oil seal (5) is provided on the left side of the crown-shaped nylon retainer (3), and the opening of the crown-shaped nylon retainer (3) faces the SC oil seal. The right side of the steel ball (4) is open.

2. The asymmetric wide-body deep groove ball bearing with SC oil seal according to claim 1, characterized in that: The first annular channel (6) and the second annular channel (7) are provided with multiple sets of openings (8) in a circular pattern on the two channel edges. The multiple sets of openings (8) are inclined and communicate with the inner cavity of the channel. An installation gap (9) is provided between the first annular channel (6) and the second annular channel (7) and the steel ball (4); The ends of the multiple sets of openings (8) near the steel ball (4) are all located within the installation gap (9).

3. An asymmetric wide-body deep groove ball bearing with an SC oil seal according to claim 2, characterized in that: The opening (8) has a V-shaped cross section and the tip of the opening (8) is set downwards.

4. An asymmetric wide-body deep groove ball bearing with SC oil seal according to claim 1, characterized in that: The bottom arc radius of the first annular channel (6) is set to 3.15±0.05mm, and the bottom arc radius of the second annular channel (7) is set to 3.06±0.05mm.

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