Waterproof and dustproof deep groove ball bearing

Abstract

The utility model discloses a waterproof and dustproof deep groove ball bearing which comprises a bearing outer ring and a bearing inner ring, a retainer and rolling bodies are arranged between the bearing outer ring and the bearing inner ring, the rolling bodies are uniformly distributed on the retainer, and a sealing ring is further arranged between the bearing inner ring and the bearing outer ring. A first clamping groove is formed in the inner side wall of the bearing outer ring; a second clamping groove is formed in the outer side wall of the bearing inner ring; the bearing outer ring is provided with the special limiting end face and the avoiding end face, and the mounting part of the sealing ring is provided with the special limiting structure; the sealing ring limiting mechanism is matched with the special limiting end face and the avoiding end face of the bearing outer ring, so that the axial limiting capacity of the sealing ring is improved, and the sealing ring is prevented from being separated from the bearing due to long-time work.

Description

Technical Field

[0001] This utility model belongs to the field of sealed and waterproof bearing technology, and relates to a waterproof and dustproof deep groove ball bearing. Background Technology

[0002] Deep groove ball bearings are the most representative rolling bearings. These bearings have a low coefficient of friction, high limiting speed, simple structure, low manufacturing cost, and are easy to manufacture with high precision. They also come in a variety of sizes and forms and are widely used as gearbox bearings.

[0003] Currently, deep groove ball bearing seals are mostly press-fitted directly between the inner and outer rings. However, conventional seals are generally fixed to the outer ring using a single structure. Since the outer surface of the seal is mostly flat, the stability of the bearing decreases sharply after prolonged use, and it may even detach, failing to achieve a long-term dust and water sealing effect. Furthermore, after prolonged operation, the performance of existing seals deteriorates due to intense friction between the sealing lip and the inner ring of the bearing.

[0004] To address the aforementioned problems, this utility model proposes a waterproof and dustproof deep groove ball bearing. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model proposes a waterproof and dustproof deep groove ball bearing.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waterproof and dustproof deep groove ball bearing, comprising an outer ring and an inner ring, wherein a cage and rolling elements evenly distributed on the cage are provided between the outer ring and the inner ring, and a sealing ring is also provided between the inner ring and the outer ring.

[0007] The bearing outer ring has a first groove formed on its inner sidewall.

[0008] The bearing inner ring has a second groove on its outer side wall.

[0009] A sealing ring, comprising a sealing ring body and a skeleton, wherein the skeleton is embedded in the sealing ring body; the upper part of the sealing ring body is provided with an installation part adapted to the first slot, and the lower part of the sealing ring body is provided with a sealing lip adapted to the second slot.

[0010] Furthermore, the first slot is provided with a limiting end face and a clearance end face on the side away from the center of the outer ring of the bearing, and the mounting part is provided with a limiting structure at its matching position; when the mounting part is interference-fitted into the first slot, the limiting structure cooperates with the limiting end face and the clearance end face to form an axial limit on the sealing ring.

[0011] Furthermore, the limiting structure includes a longitudinal surface adapted to the limiting end face and an inclined surface adapted to the avoidance end face.

[0012] Furthermore, the mounting part is provided with an annular groove, the opening of which is located away from the center of the outer ring of the bearing; an elastic ring is installed inside the annular groove.

[0013] Furthermore, the annular sink is in the shape of a dovetail.

[0014] Furthermore, the sealing lip includes a first sealing lip, a second sealing lip, a third sealing lip, and a fourth sealing lip;

[0015] The first sealing lip protrudes toward the bearing direction, and the second, third, and fourth sealing lips are all located below the first sealing lip;

[0016] The second slot includes an end one near the retainer and an end two away from the retainer; the second sealing lip and the third sealing lip are adapted to the first end, and the fourth sealing lip is adapted to the second end.

[0017] Furthermore, the end portion is stepped, including a first stepped segment and a second stepped segment; the second sealing lip is adapted to the first stepped segment, and the third sealing lip is adapted to the second stepped segment, forming a multiple sealing state.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In this utility model, the outer ring of the bearing is provided with a special limiting end face and a clearance end face, and the mounting part of the sealing ring is provided with a special limiting structure; by adapting the sealing ring limiting mechanism to the special limiting end face and clearance end face of the outer ring of the bearing, the axial limiting ability of the sealing ring is improved, and the sealing ring is prevented from detaching from the bearing due to long-term operation.

[0020] 2. In this utility model, a special annular groove is provided at the installation part of the sealing ring, and an elastic ring is adapted to fit it; the elastic ring provides stable support for the installation of the sealing ring in a secondary manner, further improving the compatibility between the sealing ring and the bearing.

[0021] 3. This utility model provides multiple sets of sealing lips and a second slot with a specific structure. The second sealing lip is adapted to the first stepped section of the second slot, the third sealing lip is adapted to the second stepped section of the second slot, and the fourth sealing lip is adapted to the end of the second slot, forming a multi-layer sealing state. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a front view of the sealing ring in this utility model;

[0024] Figure 3 This is a cross-sectional view of the present invention;

[0025] Figure 4 yes Figure 3 Enlarged view of section A.

[0026] In the diagram: 1. Bearing outer ring; 101. First groove; 101a. Limiting end face; 101b. Clearance end face; 2. Bearing inner ring; 201. Second groove; 201a. End one; 201b. End two; 3. Sealing ring; 31. Sealing ring body; 311. Mounting part; 311a. Annular groove; 313. Sealing lip; 313a. First sealing lip; 313b. Second sealing lip; 313c. Third sealing lip; 313d. Fourth sealing lip; 32. Skeleton; 5. Elastic ring. Detailed Implementation

[0027] 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 creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-4 As shown, the technical solution adopted by this utility model is as follows: a waterproof and dustproof deep groove ball bearing, including an outer ring 1, an inner ring 2, a cage, a plurality of rolling elements, and a sealing ring 3; wherein the outer ring 1 and the inner ring 2 are provided with raceways on their opposite surfaces, the plurality of rolling elements are installed in the raceways of the outer ring 1 and the inner ring 2 through the cage, and the sealing ring 3 is installed between the outer ring 1 and the inner ring 2, and provides waterproof and dustproof protection and sealing isolation for the rolling elements and the cage.

[0029] In this embodiment, a first groove 101 is provided on the inner side wall of the outer ring 1 of the bearing; a second groove 201 is provided on the outer side wall of the inner ring 2 of the bearing; and a sealing ring 3 is installed between the outer ring 1 and the inner ring 2 of the bearing through the first groove 101 and the second groove 201.

[0030] In this embodiment, the sealing ring 3 includes a sealing ring body 31 and a skeleton 32, with the skeleton 32 embedded within the sealing ring body 31. The upper part of the sealing ring body 31 is provided with a mounting portion 311 that matches the first slot 101; the lower part of the sealing ring body 31 is provided with a sealing lip 313 that matches the second slot 201. During installation, the sealing ring 3 is interference-fitted into the first slot 101 through the mounting portion 311, forming a positioning; the sealing lip 313 matches the second slot 201, providing waterproofing, dustproofing, and sealing isolation for the rolling elements and the cage.

[0031] It should be added that an oil catcher groove is preferably provided in the middle of the sealing ring body 31. When the bearing inner ring 2 is rotating for a long time, due to the relatively intense friction between the sealing lip 313 and the second groove 201 of the bearing inner ring 2, the temperature of the sealing lip 313 rises sharply. The oil in the oil catcher groove flows into the sealing lip 313 through the rolling element part, so that an oil film is formed between the sealing lip 313 and the second groove 201, which greatly reduces the friction and wear between the sealing lip 313 and the second groove 201. On the one hand, it improves the service life of the sealing ring 3, and on the other hand, it helps to prevent dust, moisture and other substances from entering.

[0032] In this embodiment, the first slot 101 is provided with a limiting end face 101a and a clearance end face 101b on the side opposite to the center of the outer ring 1 of the bearing, and the mounting part 311 is provided with a limiting structure at its matching position. When the sealing ring 3 is interference-fitted into the first slot 101 through the mounting part 311, the limiting structure cooperates with the limiting end face 101a and the clearance end face 101b to axially limit the sealing ring 3, preventing the sealing ring 3 from detaching from the first slot 101 of the outer ring 1 of the bearing after long-term use.

[0033] It should be added that the limiting structure includes a longitudinal surface adapted to the limiting end face 101a and an inclined surface adapted to the avoidance end face 101b.

[0034] In this embodiment, the mounting part 311 has an annular groove 311a, the opening of which is located away from the center of the outer ring 1 of the bearing; an elastic ring 5 is installed inside the annular groove 311a. The annular groove 311a provides pressure relief for the mounting part 311, flexibly adapting to the starting torque of the bearing, and also provides installation space for the elastic ring 5. After the sealing ring 3 is interference-fitted into the first slot 101 through the mounting part 311, the elastic ring 5 is interference-fitted into the annular groove 311a, and the elastic ring 5 provides stable support for the installation of the sealing ring 3.

[0035] It should be noted that the annular groove 311a has a dovetail groove structure. The large-diameter section of the annular groove 311a is used to install the elastic ring 5, while the small-diameter section prevents the elastic ring 5 from naturally detaching. When installing the elastic ring 5, due to its inherent elasticity, the elastic ring 5 is inserted into the large-diameter section of the annular groove 311a through the small-diameter section, completing the installation. When the bearing is operating, the elastic ring 5 will not detach from the annular groove 311a without external force.

[0036] In this embodiment, the sealing lip 313 includes a first sealing lip 313a, a second sealing lip 313b, a third sealing lip 313c, and a fourth sealing lip 313d. The first sealing lip 313a protrudes towards the bearing, and the second sealing lip 313b, third sealing lip 313c, and fourth sealing lip 313d are all located below the first sealing lip 313a. The second slot 201 includes an end 201a near the cage and an end 201b away from the cage; the second sealing lip 313b and the third sealing lip 313c are adapted to the first end 201a, and the fourth sealing lip 313d is adapted to the second end 201b.

[0037] It should be added that end 201a is stepped, including a first stepped section and a second stepped section. The second sealing lip 313b is adapted to the first stepped section, and the third sealing lip 313c is adapted to the second stepped section. When the sealing ring 3 is installed in the first slot 101 through the mounting part 311, the second sealing lip 313b overlaps the first stepped section, the third sealing lip 313c overlaps the second stepped section, and the fourth sealing lip 313d overlaps the end 201b, thus forming a multiple sealing state.

[0038] In this embodiment, during high-speed rotation of the bearing, when the second sealing lip 313b overlaps the first stepped section, some of the oil adhering to the rolling element flows through the first stepped section to the second sealing lip 313b, forming an oil film between the second sealing lip 313b and the first stepped section; if a small amount of oil flows into the second stepped section through the gap between the second sealing lip 313b and the first stepped section, a small amount of oil flows through the second stepped section to the third sealing lip 313c, forming an oil film between the third sealing lip 313c and the second stepped section.

[0039] It should be added that even if a small amount of oil flows into the second slot 201 after passing through the first and second steps, the small amount of oil flowing into the second slot 201 will not detach from the bearing due to the centrifugal force of the bearing inner ring 2, because the fourth sealing lip 313d cooperates with the end 201b. Some of the oil under the centrifugal force of the bearing inner ring 2 is adhered to the connection surface formed by the third sealing lip 313c and the fourth sealing lip 313d. Even if some of the oil reaches a certain amount, it will pass through the end face of the fourth sealing lip 313d and enter between the fourth sealing lip 313d and the end 201b, further forming an oil film.

[0040] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A waterproof and dustproof deep groove ball bearing, comprising an outer ring (1) and an inner ring (2), wherein a cage and rolling elements evenly distributed on the cage are disposed between the outer ring (1) and the inner ring (2), and a sealing ring (3) is further disposed between the inner ring (2) and the outer ring (1), characterized in that: The bearing outer ring (1) has a first groove (101) on its inner sidewall. The bearing inner ring (2) has a second groove (201) on its outer side wall. A sealing ring (3) includes a sealing ring body (31) and a skeleton (32), the skeleton (32) being embedded in the sealing ring body (31); the upper part of the sealing ring body (31) is provided with an installation part (311) adapted to the first slot (101), and the lower part of the sealing ring body (31) is provided with a sealing lip (313) adapted to the second slot (201). The first slot (101) is provided with a limiting end face (101a) and a clearance end face (101b) on the side away from the center of the outer ring (1) of the bearing. The mounting part (311) is provided with a limiting structure at its matching position. When the mounting part (311) is interference-fitted into the first slot (101), the limiting structure cooperates with the limiting end face (101a) and the clearance end face (101b) to form an axial limit on the sealing ring (3). The limiting structure includes a longitudinal surface adapted to the limiting end face (101a) and an inclined surface adapted to the avoidance end face (101b).

2. The waterproof and dustproof deep groove ball bearing according to claim 1, characterized in that: An annular groove (311a) is provided on the mounting part (311), and the opening of the annular groove (311a) is located away from the center of the outer ring (1) of the bearing; an elastic ring (5) is installed in the annular groove (311a).

3. The waterproof and dustproof deep groove ball bearing according to claim 2, characterized in that: The annular sinkhole (311a) is dovetail-shaped.

4. The waterproof and dustproof deep groove ball bearing according to claim 1, characterized in that: The sealing lip (313) includes a first sealing lip (313a), a second sealing lip (313b), a third sealing lip (313c), and a fourth sealing lip (313d). The first sealing lip (313a) protrudes toward the bearing direction, and the second sealing lip (313b), the third sealing lip (313c) and the fourth sealing lip (313d) are all located below the first sealing lip (313a); The second slot (201) includes an end one (201a) near the retainer and an end two (201b) away from the retainer; the second sealing lip (313b) and the third sealing lip (313c) are adapted to the end one (201a), and the fourth sealing lip (313d) is adapted to the end two (201b).

5. The waterproof and dustproof deep groove ball bearing according to claim 4, characterized in that: The end portion (201a) is stepped, including a first stepped segment and a second stepped segment; the second sealing lip (313b) is adapted to the first stepped segment, and the third sealing lip (313c) is adapted to the second stepped segment, forming a multi-seal state.

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