Fixed sealing element and bearing assembly for vertical shaft

Abstract

The invention relates to a stationary seal and a bearing assembly for a vertical shaft. The fixed sealing piece for the vertical shaft comprises a supporting body and an elastic sealing layer, the whole supporting body is annular, the elastic sealing layer at least wraps the radial outer side and the radial inner side of the supporting body, a sealing lip is formed on the radial outer side and the elastic sealing layer, and a mounting part is formed on the radial inner side and the elastic sealing layer. By the adoption of the fixing sealing piece and the bearing assembly for the vertical shaft, a good sealing effect can be achieved, and the fixing sealing piece and the bearing assembly are stable to install and not prone to falling off.

Description

Technical Field

[0001] This application relates to the technical field of bearings. More specifically, this application relates to a fixed seal and a bearing assembly for a vertical shaft. Background Art

[0002] As Figure 1 shown, the bearing contains lubricating grease inside. The bearing includes structural components such as an inner ring 200', an outer ring 300', and rolling elements 400'. The lubricating grease is used to lubricate the rolling elements 400' inside the bearing. However, when the bearing is tilted downward or vertically installed, under the action of gravity, the lubricating grease inside the bearing may settle to the bottom of the bearing. This causes the rolling elements at the upper part of the bearing to lose lubrication, resulting in problems such as a large temperature rise and a reduced service life.

[0003] In the prior art, as Figure 2 shown, the bearing includes structural components such as an inner ring 200', an outer ring 300', and rolling elements 400', and a plastic seal 100' is added inside the bearing. However, the plastic seal 100' cannot directly contact the rotating outer ring 300' of the bearing and needs to have a gap, so it cannot provide a good seal. In addition, the expansion rate and shrinkage rate of the plastic seal are different from those of the inner ring 200' of the bearing, which is likely to cause the detachment of the plastic seal. Summary of the Invention

[0004] The purpose of this application is to provide a fixed seal and a bearing assembly for a vertical shaft that can achieve a good sealing effect.

[0005] This application provides a fixed seal for a vertical shaft. The fixed seal includes:

[0006] A support body, which is annular as a whole;

[0007] An elastic sealing layer, which at least covers the radial outer side and the radial inner side of the support body. On the radial outer side, the elastic sealing layer forms a sealing lip, and on the radial inner side, the elastic sealing layer forms a mounting portion.

[0008] In an embodiment of this application, at least one rib is provided on the mounting portion, and the rib protrudes inward in the radial direction.

[0009] In an embodiment of this application, the rib has a connected guiding surface and a stopping surface. The guiding surface is inclined with respect to the surface of the mounting portion, and the stopping surface is perpendicular to the surface of the mounting portion.

[0010] In an embodiment of this application, a clamping portion is provided on the support body, and the clamping portion protrudes inward in the radial direction.

[0011] In an embodiment of the present application, the cross-section of the support body is U-shaped, the support body has an opening, and the support body includes a first support leg and a second support leg. The first support leg is located on the radially inner side, and the second support leg is located on the radially outer side.

[0012] In an embodiment of the present application, the clamping portion is located on the radially inner surface of the first support leg.

[0013] An embodiment of the present application further provides a bearing assembly for a vertical shaft, which includes:

[0014] Inner ring;

[0015] Outer ring;

[0016] Rolling elements, the rolling elements being located between the inner ring and the outer ring; and

[0017] The above-mentioned fixed seal for a vertical shaft, the fixed seal is arranged between the inner ring and the outer ring, the mounting portion is mounted to the inner ring, and the sealing lip abuts against the outer ring.

[0018] In an embodiment of the present application, at least one rib is provided on the mounting portion, the rib protrudes radially inward, the mounting portion is in interference fit with the inner ring, and the rib is clamped between the mounting portion and the inner ring.

[0019] In an embodiment of the present application, a clamping portion is provided on the support body of the fixed seal, the clamping portion protrudes radially inward, an annular mounting groove is provided on the outer surface of the inner ring, and the clamping portion is located in the mounting groove.

[0020] In an embodiment of the present application, the cross-section of the support body is U-shaped, the support body has an opening, the fixed seal is located below the rolling elements, and the opening faces the rolling elements.

[0021] In an embodiment of the present application, the bearing assembly includes at least two rows of the rolling elements, the fixed seals are arranged in pairs between adjacent two rows of the rolling elements, and the openings of the fixed seals arranged in pairs face away from each other.

[0022] In the fixed seal and bearing assembly for a vertical shaft of the present application, the fixed seal includes a support body and an elastic seal layer. The support body can provide support to the elastic seal layer and increase the impact force that can be borne. The elastic seal layer covers at least the radial outer side and the radial inner side of the support body. On the radial outer side, the elastic seal layer forms a sealing lip, and the elastic sealing lip can be in direct contact with the outer ring of the bearing, thereby achieving a better sealing effect. On the radial inner side, the elastic seal layer forms a mounting portion, and the elastic mounting portion can be mounted to the inner ring of the bearing. The elastic mounting portion can generate a large pressing force on the inner ring of the bearing. Therefore, the fixed seal is firmly installed and not easily detached. Description of the Drawings

[0023] Figure 1 is a cross-sectional view of a bearing assembly in the prior art of the present application;

[0024] Figure 2 is a cross-sectional view of another embodiment of a bearing assembly in the prior art of the present application;

[0025] Figure 3 is a cross-sectional view of a bearing assembly in an embodiment of the present application;

[0026] Figure 4 is Figure 3 a partial enlarged view of;

[0027] Figure 5 is an enlarged cross-sectional view of the fixed seal in an embodiment of the present application;

[0028] Figure 6 is a partial three-dimensional schematic diagram of the fixed seal in an embodiment of the present application. Detailed Description of the Embodiments

[0029] The following will describe the specific embodiments according to the present application with reference to the drawings. The following detailed description and the drawings are used to exemplarily illustrate the principles of the present application. The present application is not limited to the described preferred embodiments, and the protection scope of the present application is defined by the claims.

[0030] As Figures 3 - 6 shown, an embodiment of the present application provides a fixed seal 100 for a vertical shaft and its bearing assembly. The fixed seal 100 is located between the inner ring 200 and the outer ring 300 of the bearing and is mounted to the inner ring 200 of the bearing.

[0031] As Figures 5 - 6As shown, in the embodiment of the present application, the fixed seal 100 for a vertical shaft includes a support body 110 and an elastic sealing layer 120. The support body 110 is annular as a whole. The support body 110 can provide an installation basis for the elastic sealing layer 120 and support the elastic sealing layer 120. Therefore, the impact force that the fixed seal 100 can withstand can be increased. The support body 110 can be made of a plastic material. Of course, the support body 110 can also be made of other metal or alloy materials.

[0032] The elastic sealing layer 120 at least covers the radial outer side 111 and the radial inner side 112 of the support body 110. And on the radial outer side 111, the elastic sealing layer 120 forms a sealing lip 121. On the radial inner side 112, the elastic sealing layer 120 forms an installation part 122. On the radial outer side 111, the elastic sealing lip 121 can be in direct contact with the outer ring 300 of the bearing, so as to achieve a better sealing effect. On the radial inner side 112, the elastic installation part 122 can be installed on the inner ring 200 of the bearing. For example, in an interference fit manner, the elastic installation part 122 can generate a greater pressing force on the inner ring 200 of the bearing. Therefore, the fixed seal 100 is firmly installed and not easily detached.

[0033] The elastic sealing layer 120 can be set as a split type. One part covers the radial outer side 111 of the support body 110 to form a sealing lip 121, and the other part covers the radial inner side 112 of the support body 110 to form an installation part 122. Of course, the elastic sealing layer 120 can also be set as a one-piece type, covering the support body 110 from the radial outer side 111 of the support body 110 via the support body 110 to the radial inner side 112 of the support body 110.

[0034] In the embodiment of the present application, the support body 110 is made of a plastic material, the elastic sealing layer 120 is made of a rubber material, and the support body 110 and the elastic sealing layer 120 are combined into an integral structure through a vulcanization process.

[0035] In the embodiment of the present application, at least one rib is provided on the installation part 122, and the rib protrudes radially inward. When the rib is squeezed, it can provide a greater pressing force to the inner ring 200.

[0036] In the embodiment of the present application, two ribs are provided. The two ribs are respectively a first rib 1222 and a second rib 1223. That is, a first rib 1222 and a second rib 1223 are provided on the installation part 122.

[0037] The first rib 1222 can be arranged on the inner circumference of the installation part 122, and the first rib 1222 protrudes radially inward. Therefore, when the first rib 1222 is squeezed, it can provide a greater pressing force to the inner ring 200.

[0038] When the fixed seal 100 is installed on the inner ring 200, the first rib 1222 is squeezed between the mounting portion 122 and the inner ring 200. When the first rib 1222 is squeezed, it can provide a greater pressing force to the inner ring 200. When the mounting groove 210 is provided in the inner ring 200, the first rib 1222 is located in the mounting groove 210 of the inner ring 200, and the first rib 1222 is squeezed between the bottom of the mounting groove 210 and the mounting portion. Since the first rib 1222 is located in the mounting groove 210 of the inner ring 200, the first rib 1222 can also play a role in preventing the fixed seal 100 from falling off.

[0039] In the embodiment of the present application, a second rib 1223 is further provided on the mounting portion 122. The second rib 1223 is located on the inner circumference of the mounting portion 122, and the second rib 1223 protrudes radially inward. Therefore, when the second rib 1223 is squeezed, it can provide a greater pressing force to the inner ring 200. And the second rib 1223 and the first rib 1222 cooperate to play a role of double insurance.

[0040] In the embodiment of the present application, in the axial direction, the mounting portion 122 has a first end 123 and a second end 124. That is to say, the fixed seal 100 has a first end 123 and a second end 124. During the process of installing the fixed seal 100, the operation pressure application direction of the fixed seal 100 is from the second end 124 to the first end 123. When the fixed seal 100 is installed on the bearing assembly, the first end 123 faces the grease side.

[0041] The first rib 1222 is close to the first end 123, the second rib 1223 is close to the second end 124, and there is a certain distance between the second rib 1223 and the first rib 1222. When the pressure on the grease side is relatively large, the cooperation between the second rib 1223 and the first rib 1222 can play a better supporting role to avoid the fixed seal 100 from turning and deforming with the positioning protrusion as the center.

[0042] In the embodiment of the present application, the rib has a connected guiding surface and a stopping surface. The guiding surface is inclined with respect to the surface of the mounting portion 122, and the stopping surface is perpendicular to the surface of the mounting portion 122.

[0043] Both the first rib 1222 and the second rib 1223 have a guiding surface and a stopping surface. The first rib 1222 has a first guiding surface 1225 and a first stopping surface 1226. The second rib 1223 has a second guiding surface 1227 and a second stopping surface 1227.

[0044] Specifically, the first rib 1222 has a connected first guiding surface 1225 and a first stopping surface 1226. In the axial direction from the first end 123 to the second end 124, the first guiding surface 1225 inclines from the surface of the mounting portion 122 in a direction gradually approaching the axis, and the first stopping surface 1226 is perpendicular to the surface of the mounting portion 122.

[0045] It can also be said that the cross-section of the first rib 1222 is a right triangle, with the hypotenuse facing the inner ring 200. Or, when the mounting groove 210 is provided in the inner ring 200, the hypotenuse faces the bottom of the mounting groove 210. One right side coincides with the surface of the mounting portion 122, and the other right side is perpendicular to the surface of the mounting portion 122. And when the mounting groove 210 is provided in the inner ring 200, the hypotenuse faces the groove wall of the mounting groove 210.

[0046] On the one hand, the first rib 1222 is set in such a shape that during the process of pressing and installing the fixed seal 100 in the axial direction from the second end 124 to the first end 123, the first rib 1222 does not affect the movement of the fixed seal 100 along the inner ring 200. On the other hand, the first rib 1222 is set in such a shape that after the fixed seal 100 is installed in place, the first guiding surface 1225 is squeezed to play a role in stabilizing the installation of the fixed seal 100. When the mounting groove 210 is provided in the inner ring 200, the first stopping surface 1226 can play a role in preventing the fixed seal 100 from falling off.

[0047] Of course, the first rib 1222 can also be set in shapes such as a semi-circular cross-section or a trapezoidal cross-section.

[0048] The second rib 1223 has a connected second guiding surface 1227 and a second stopping surface 1228. In the axial direction from the first end 123 to the second end 124, the second guiding surface 1227 inclines from the surface of the mounting portion 122 in a direction gradually approaching the axis, and the second stopping surface 1228 is perpendicular to the surface of the mounting portion 122.

[0049] Similar to the above-mentioned first rib 1222, it can also be said that the cross-section of the second rib 1223 is a right triangle, with the hypotenuse facing the surface of the inner ring 200. One right side coincides with the surface of the mounting portion 122, and the other right side is perpendicular to the surface of the mounting portion 122.

[0050] On the one hand, the second convex rib 1223 is arranged in such a shape that during the process of pressing and installing the fixed seal 100 in the axial direction pointing from the second end 124 to the first end 123, the second convex rib 1223 does not affect the movement of the fixed seal 100 along the inner ring 200. On the other hand, the second convex rib 1223 is arranged in such a shape that after the fixed seal 100 is installed in place, the second guiding surface 1227 is squeezed to play a role in firmly installing the fixed seal 100.

[0051] Of course, similar to the above-mentioned first convex rib 1222, the second convex rib 1223 can also be arranged in a shape with a semicircular cross-section, a trapezoidal cross-section, etc.

[0052] The perpendicular mentioned above is basically perpendicular, allowing a certain deviation range, and is not strictly limited to perpendicular without deviation.

[0053] In the embodiment of the present application, a clamping portion 113 is provided on the support body 110, and the clamping portion 113 protrudes radially inward. After the elastic sealing layer 120 covers the clamping portion 113, a positioning protrusion is formed. An installation groove 210 is provided on the inner ring 200 of the bearing. The positioning protrusion formed by the elastic sealing layer 120 covering the clamping portion 113 cooperates with the installation groove 210. During the process of installing the fixed seal 100, the positioning protrusion can play a role in positioning the fixed seal 100. After the fixed seal 100 is installed in place, the positioning protrusion can play a role in preventing the fixed seal 100 from falling off.

[0054] In the embodiment of the present application, the cross-section of the support body 110 is U-shaped, and the support body 110 has an opening 114, and the opening 114 is located at the first end 123.

[0055] Moreover, the support body 110 includes a first support leg 115 and a second support leg 116. The first support leg 115 is located on the radially inner side 112, and the second support leg 116 is located on the radially outer side 111. That is to say, the elastic sealing layer 120 covers the second support leg 116 to form a sealing lip 121. The elastic sealing layer 120 covers the first support leg 115 to form an installation portion 122.

[0056] In the embodiment of the present application, the clamping portion 113 is located on the radially inner surface of the first support leg 115.

[0057] The clamping portion 113 is close to the first end 123. When the pressure on the grease side is relatively large, it can play a better supporting role and prevent the fixed seal 100 from turning and deforming with the positioning protrusion formed by the elastic sealing layer 120 covering the clamping portion 113 as the center.

[0058] Such as Figures 3 - 4As shown, the embodiment of the present application also provides a bearing assembly for a vertical shaft. The bearing assembly includes an inner ring 200, an outer ring 300, rolling elements 400, and the above-mentioned fixed seal 100. The rolling elements 400 are located between the inner ring 200 and the outer ring 300. Of course, the bearing assembly also includes other structures such as a cage 500, which will not be elaborated herein.

[0059] The fixed seal 100 is disposed between the inner ring 200 and the outer ring 300. The mounting portion 122 is mounted to the inner ring 200, and the sealing lip 121 abuts against the outer ring 300. The fixed seal 100 includes a support body 110 and an elastic sealing layer 120. The support body 110 is integrally annular, and the elastic sealing layer 120 covers at least the radially outer side 111 and the radially inner side 112 of the support body 110. On the radially outer side 111, the elastic sealing layer 120 forms a sealing lip 121, and the elastic sealing lip 121 is in direct contact with the outer ring 300, thereby achieving a better sealing effect. On the radially inner side 112, the elastic sealing layer 120 forms a mounting portion 122. The elastic mounting portion 122 can be mounted to the inner ring 200 of the bearing, and the elastic mounting portion 122 can generate a large pressing force on the inner ring 200 of the bearing. Therefore, the fixed seal 100 is firmly mounted and not easily detached.

[0060] In the embodiment of the present application, the mounting portion 122 is in interference fit with the inner ring 200. At least one rib is provided on the mounting portion 122, and the rib protrudes radially inward. The rib is clamped between the mounting portion 122 and the inner ring 200. When the rib is squeezed, a greater pressing force can be provided to the inner ring 200.

[0061] In the embodiment of the present application, a ring-shaped mounting groove 210 is provided on the outer surface of the inner ring 200. A clamping portion 113 is provided on the support body 110, and the clamping portion 113 protrudes radially inward. The clamping portion 113 is located in the mounting groove 210. After the elastic sealing layer 120 covers the clamping portion 113, a positioning protrusion is formed. The positioning protrusion formed by the elastic sealing layer 120 covering the clamping portion 113 cooperates with the mounting groove 210. During the process of installing the fixed seal 100, the positioning protrusion can play a role in positioning the fixed seal 100. After the fixed seal 100 is installed in place, the positioning protrusion can play a role in preventing the fixed seal 100 from falling off.

[0062] In the embodiment of the present application, the cross-section of the support body 110 is U-shaped, the support body 110 has an opening 114, the fixed seal 100 is located below the rolling elements 400, and the opening 114 faces the rolling elements 400. In this way, the fixed seal 100 can block the downward flow of the lubricating grease under the action of gravity, thereby keeping the lubricating grease around the rolling elements 400 and lubricating the rolling elements 400.

[0063] In the embodiments of the present application, the rolling elements 400 can be single-row rolling elements, double-row rolling elements or multi-row rolling elements.

[0064] When the rolling elements 400 are single-row rolling elements, the fixed seal 100 is located below the rolling elements 400. The fixed seal 100 can prevent the lubricating grease from flowing downward under the action of gravity, so as to keep the lubricating grease around the rolling elements 400 and lubricate the rolling elements 400.

[0065] When the rolling elements 400 are double-row rolling elements or multi-row rolling elements, the fixed seals 100 are arranged in pairs between two adjacent rows of rolling elements 400. The openings 114 of the fixed seals 100 arranged in pairs face away from each other, and the openings 114 face the grease side. Therefore, when the assembled bearing assembly is installed on other structures, no matter which end is downward, it can prevent the lubricating grease above from flowing to the below, so as to ensure that there is lubricating grease around the upper rolling elements 400 for lubrication.

[0066] The inner diameter of the support body 110 is greater than the outer diameter of the inner ring 200. When the fixed seal 100 is not installed on the inner ring 200, the inner diameter of the elastic sealing layer 120 is smaller than the outer diameter of the inner ring 200. When the fixed seal 100 is installed on the inner ring 200, the pressing force of the installation part 122 of the elastic sealing layer 120 on the inner ring 200 realizes the fixed installation of the fixed seal 100.

[0067] The specific structure of the fixed seal 100 has been described in detail above and will not be elaborated here.

[0068] In the embodiments of the present application, during the installation of the fixed seal 100, the fixed seal 100 is pressed in the direction from the second end 124 to the first end 123. The fixed seal 100 moves axially on the outer surface of the inner ring 200 until the positioning protrusion formed by the clamping part 113 enters the installation groove 210, indicating that the fixed seal 100 is installed in place.

[0069] As described above, although the exemplary embodiments of the present application have been described with reference to the drawings, the present application is not limited to the above specific embodiments. The protection scope of the present application should be defined by the claims and their equivalent meanings.

[0070] List of Reference Signs

[0071] Fixed seal 100

[0072] Support body 110

[0073] Radial outside 111

[0074] Radial inside 112

[0075] Clamping part 113

[0076] Opening 114

[0077] First support leg 115

[0078] Second support leg 116

[0079] Elastic sealing layer 120

[0080] Sealing lip 121

[0081] Installation part 122

[0082] First rib 1222

[0083] First guiding surface 1225

[0084] First stop surface 1226

[0085] Second rib 1223

[0086] Second guiding surface 1227

[0087] Second stop surface 1228

[0088] First end 123

[0089] Second end 124

[0090] Inner rings 200, 200'

[0091] Outer rings 300, 300'

[0092] Rolling elements 400, 400'

[0093] Cage 500

[0094] Plastic seal 100'.

Claims

1. A fixed seal (100) for a vertical shaft, comprising: A support body (110), which is integrally annular; An elastic sealing layer (120), the elastic sealing layer (120) at least covering the radial outer side (111) and the radial inner side (112) of the support body (110), and on the radial outer side (111), the elastic sealing layer (120) forms a sealing lip (121), and on the radial inner side (112), the elastic sealing layer (120) forms a mounting portion (122).

2. The fixed seal (100) for a vertical shaft according to claim 1, wherein, At least one rib is provided on the mounting portion (122), and the rib protrudes radially inward.

3. The fixed seal (100) for a vertical shaft according to claim 2, wherein, The rib has a connected guiding surface and a stopping surface, the guiding surface is inclined relative to the surface of the mounting portion (122), and the stopping surface is perpendicular to the surface of the mounting portion (122).

4. The fixed seal (100) for a vertical shaft according to claim 1, wherein, A clamping portion (113) is provided on the support body (110), and the clamping portion (113) protrudes radially inward.

5. The fixed seal (100) for a vertical shaft according to claim 4, wherein, The cross-section of the support body (110) is U-shaped, the support body (110) has an opening (114), and the support body (110) includes a first support leg (115) and a second support leg (116), the first support leg (115) is located on the radial inner side (112), and the second support leg (116) is located on the radial outer side (111).

6. The fixed seal (100) for a vertical shaft according to claim 5, wherein, The clamping portion (113) is located on the radial inner surface of the first support leg (115).

7. A bearing assembly for a vertical shaft, wherein, It includes: An inner ring (200); An outer ring (300); Rolling elements (400), the rolling elements (400) are located between the inner ring (200) and the outer ring (300); and The fixed seal (100) for a vertical shaft according to any one of claims 1 to 6, the fixed seal (100) is disposed between the inner ring (200) and the outer ring (300), the mounting portion (122) is mounted to the inner ring (200), and the sealing lip (121) abuts against the outer ring (300).

8. The bearing assembly for a vertical shaft according to claim 7, wherein, At least one rib is provided on the mounting portion (122), the rib protrudes radially inward, the mounting portion (122) has an interference fit with the inner ring (200), and the rib is clamped between the mounting portion (122) and the inner ring (200).

9. The bearing assembly for a vertical shaft according to claim 8, wherein, A clamping portion (113) is provided on the support body (110) of the fixed seal (100), the clamping portion (113) protrudes radially inward, an annular mounting groove (210) is provided on the outer surface of the inner ring (200), and the clamping portion (113) is located in the mounting groove (210).

10. The bearing assembly for a vertical shaft according to claim 7, wherein, The cross-section of the support body (110) is U-shaped, the support body (110) has an opening (114), the fixed seal (100) is located below the rolling elements (400), and the opening (114) faces the rolling elements (400).

11. The bearing assembly for a vertical shaft according to claim 10, wherein, The bearing assembly includes at least two rows of the rolling elements (400), and the fixed seals (100) are arranged in pairs between two adjacent rows of the rolling elements (400), and the openings (114) of the fixed seals (100) arranged in pairs face away from each other.

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