CN218440265U - Waterproof bearing for motor - Google Patents
Waterproof bearing for motor Download PDFInfo
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- CN218440265U CN218440265U CN202222626977.7U CN202222626977U CN218440265U CN 218440265 U CN218440265 U CN 218440265U CN 202222626977 U CN202222626977 U CN 202222626977U CN 218440265 U CN218440265 U CN 218440265U
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Abstract
A waterproof bearing for a motor belongs to the technical field of bearings and comprises an inner ring, an outer ring, a steel ball, a bearing sealing ring, a half-holder and a rivet, wherein a sealing groove A is formed in the edge of the inner wall of the outer ring, a sealing groove B is formed in the edge of the outer wall of the inner ring, and the sealing groove B and the sealing groove A correspond to each other; the bearing sealing ring comprises a sealing ring main body and a framework arranged in the sealing ring main body; the sealing ring main body comprises an outer sealing end in sealing fit with the sealing groove A and an inner sealing end in sealing fit with the sealing groove B; the inner sealing end comprises a main sealing ring, an inner sealing end waist part, an auxiliary sealing ring and a dustproof sealing ring; the waist part of the inner sealing end is arranged in the middle of the inner sealing end, above the main sealing ring and the dustproof sealing ring and below the auxiliary sealing ring, and the auxiliary sealing ring is in clearance fit with the outer wall of the bearing inner ring; the sealing groove B of the inner ring comprises an inner side surface, a groove bottom, an outer side surface B and an upper end extension part of the outer side surface B. The utility model has the advantages that: water and oil resistance.
Description
Technical Field
The utility model relates to a bearing for motor, in particular to waterproof bearing for motor belongs to bearing technical field.
Background
The motor is the most widely applied equipment, and the waterproof bearing for the motor is an important part of the motor. The waterproof bearing for the motor is generally made of bearing steel, prevents water, grease and foreign matters from permeating into the bearing to cause rusting and corrosion in a humid working environment and a working environment with water solution scouring, avoids the failure of the bearing and enables the motor to normally run.
The waterproof bearing for the motor consists of an outer ring, an inner ring, a steel ball, a retainer and a sealing element, wherein a sealing groove A is arranged at the edge of the inner wall of the outer ring, and a sealing groove B is arranged at the edge of the outer wall of the inner ring. The sealing element mainly refers to a bearing sealing ring, the bearing sealing ring comprises a sealing ring main body made of rubber materials and a framework arranged in the sealing ring main body, and the sealing ring main body comprises an outer sealing end in sealing fit with the sealing groove A and an inner sealing end in sealing fit with the sealing groove B. Inside the inseparable cooperation through interior sealed end and seal groove B prevents that dust or moisture from getting into the bearing, also prevents that the inside lubricating oil of bearing from leaking outward, prolongs the life of bearing.
The sealing effect of the waterproof bearing for the existing motor is not ideal, because the length of the extension of the inner end of the framework of the bearing sealing ring towards the direction of the inner sealing end is insufficient, the pressure generated to the inner sealing end is too small, and the sealing effect is reduced; the waist part of the inner sealing end of the bearing sealing ring has insufficient height, so that the starting torque of the bearing can not be effectively controlled, and the sealing performance of the bearing is reduced; the angle between the inner side surface and the outer side surface of the sealing groove B and the radial line of the bearing is unreasonable in design, so that the inner sealing end is not tightly attached to the inner side surface and the outer side surface of the sealing groove B, and the sealing performance of the bearing is influenced; the surface of the sealing groove B is rough, the machining precision is low, the fitting degree between the inner sealing end and the sealing groove B is reduced, and the further improvement of the sealing performance is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above-mentioned prior art in, the waterproof defect of bearing provides a waterproof bearing for motor, can reach waterproof, grease proofing purpose.
In order to realize the purpose, the utility model adopts the technical scheme that: a waterproof bearing for a motor comprises an inner ring, an outer ring, a steel ball, a bearing sealing ring, a half retainer and a rivet, wherein a sealing groove A is arranged at the edge of the inner wall of the outer ring, a sealing groove B is arranged at the edge of the outer wall of the inner ring, and the sealing groove B and the sealing groove A correspond to each other; the half retainer is fixed on the raceway between the inner ring and the outer ring through rivets, and the steel ball is movably clamped on a set position of the half retainer;
the bearing sealing ring comprises a sealing ring main body and a framework arranged in the sealing ring main body; the sealing ring main body comprises an outer sealing end in sealing fit with the sealing groove A and an inner sealing end in sealing fit with the sealing groove B; interior sealed end includes main seal circle, interior sealed end waist, secondary seal circle and dust seal circle, main seal circle is interference fit with the inside wall of seal groove B, and the magnitude of interference along bearing axial direction is: 0.1-0.15mm; the waist part of the inner sealing end is arranged in the middle of the inner sealing end, above the main sealing ring and the dustproof sealing ring and below the auxiliary sealing ring, and the auxiliary sealing ring is in clearance fit with the outer wall of the bearing inner ring, so that the friction resistance is prevented from being generated in the process that the bearing inner ring rotates relative to the bearing outer ring; the main body of the bearing sealing ring is ACM acrylic ester waterproof rubber;
the sealing groove B of the inner ring comprises an inner side surface, a groove bottom, an outer side surface B and an upper end extension part of the outer side surface B, the inner end of a framework of the bearing sealing ring extends towards the direction of an inner sealing end to generate certain pressure on the inner sealing end, the distance between the framework close to the inner end and the upper end extension part of the outer side surface B is 1.02-1.08mm, the fit degree between the main sealing ring and the sealing groove B and the fit degree between the dustproof sealing ring and the main sealing ring are effectively controlled, and the sealing performance of the bearing is improved; the height of the waist part of the inner sealing end is 0.22-0.28mm, and the starting torque of the bearing can be effectively controlled by controlling the height size of the waist part of the inner sealing end, so that the sealing performance of the bearing is improved;
the dustproof sealing ring is arranged above the upper end extension part of the sealing groove B, the lower end part of the dustproof sealing ring is in interference fit with the upper end extension part of the sealing groove B, and the interference magnitude along the radial direction of the bearing is 0.05-0.1mm; the dustproof sealing ring can effectively prevent external substances such as water, silt and the like from entering the bearing, and avoids the influence on the sealing performance of the bearing caused by the deformation of the main sealing ring due to the influence of foreign objects on the main sealing ring; the included angle between the inner side surface and the radial line of the bearing is 8-12 degrees, the included angle between the outer side surface and the radial line of the bearing is 27-33 degrees, and the inner sealing end of the bearing sealing ring can be in optimal tight fit with the sealing groove B;
the surface of the sealing groove B of the inner ring is a high-precision surface which is dressed and ground by the diamond roller, the roughness of the ground surface is less than or equal to Ra0.63, the size dispersion and the roughness are greatly reduced, the sealing groove is more closely attached to the lip of the sealing ring, and the waterproof performance is greatly improved.
The diameter of the outer ring is 40mm, the height of the outer ring is 12mm, and an included angle between the outer side edge of the sealing groove A and a radial line is 45 degrees; and a closed space is formed between the outer ring and the inner ring, so that grease leakage can be prevented.
The distance between the end, close to the inner ring, of the framework and the upper end extending part of the outer side surface B is 1.05mm, and the height of the waist part of the inner sealing end is 0.25mm.
The interference between the main seal ring and the inner side wall of the seal groove B along the axial direction of the bearing is as follows: 0.13mm, the interference of the dustproof sealing ring and the upper end extension part of the outer side surface B along the radial direction of the bearing is 0.08mm, and the proper interference determines the sealing performance and the starting torque of the bearing.
The radial projection of the inner sealing end on the bearing inner ring completely covers the sealing groove B, and under the condition of high-speed rotation, under the guiding action of the secondary sealing ring, lubricating grease flows to the outer wall of the bearing inner ring and cannot enter the sealing groove B, so that the risk of leakage of the lubricating grease is reduced, and the lubricating grease is ensured to be in an effective working state.
The included angle between the inner side face and the radial line direction of the bearing is 10 degrees, and the included angle between the outer side face and the radial line direction of the bearing is 30 degrees; an airtight cavity is formed between the inner sealing end of the sealing ring main body and the sealing groove B, and external water vapor and dust can be prevented from entering the bearing sealing ring by the structure.
The outer diameter of the inner ring is 24.4mm, the diameter of a circle where the extension part at the upper end of the inner ring is located is 23.5mm and is smaller than the outer diameter of the inner ring, and the diameter of a circle where the bottom of the inner ring is located is 22.6mm; when the bearing bears external liquid pressure, the inner sealing end can be tightly attached to the dust-proof groove B, so that the sealing performance is better, and the protection capability is stronger.
The seal groove A of the outer ring comprises an outer side surface A.
Compared with the prior art, the beneficial effects of the utility model are that:
firstly, the length of the inner inward sealing end direction of the framework of the bearing sealing ring is prolonged, the pressure generated by the inward sealing end is increased, secondly, on the premise of not influencing the rotation of the bearing, the height of the waist of the inward sealing end is increased, the starting torque of the bearing is effectively controlled, thirdly, the inner side surface and the outer side surface of the sealing groove B and the angle between the radial lines of the bearing are precisely designed, the inner side surface and the outer side surface of the inward sealing end and the sealing groove B are tightly attached, thereby, the structure of the waterproof bearing for the motor is optimally designed, the sealing performance of the waterproof bearing for the motor is improved to the maximum extent, the external water is effectively prevented, the grease and the foreign matters are permeated into the bearing, the service durability of the bearing is improved, the material and labor cost are reduced, and the production efficiency and the economic benefit are improved.
Drawings
FIG. 1 is a schematic diagram of: the utility model discloses a front view cross section;
FIG. 2 is a diagram: enlarged view of the main view of the bearing seal ring;
FIG. 3 is a diagram of: an enlarged front view cross-sectional view of the inner ring;
FIG. 4 is a diagram of: FIG. 3 is an enlarged view of section A;
FIG. 5 is a schematic diagram of: an enlarged view of the outer ring in front elevation;
FIG. 6 is a diagram of: fig. 5 is an enlarged view of part B.
Description of reference numerals: the sealing structure comprises an inner ring 1, an outer ring 2, a steel ball 3, a bearing sealing ring 4, an outer sealing end 401, an inner sealing end 402, a main sealing ring 403, an inner sealing end waist 404, an auxiliary sealing ring 405, a dustproof sealing ring 406, a half retainer 5, a rivet 6, a sealing groove A7, an outer side surface A701, a sealing groove B8, an inner side surface 801, a groove bottom 802, an outer side surface B803, an upper end extension part 804, a framework 9, a closed space 10 and a closed cavity 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 6, a waterproof bearing for a motor, as shown in fig. 1, comprises an inner ring 1, an outer ring 2, a steel ball 3, a bearing seal ring 4, a half-holder 5 and a rivet 6, wherein the edge of the inner wall of the outer ring 2 is provided with a seal groove A7, the edge of the outer wall of the inner ring 1 is provided with a seal groove B8, and the seal groove B8 and the seal groove A7 correspond to each other; the half retainer 5 is fixed on a raceway between the inner ring 1 and the outer ring 2 through rivets 6, and the steel ball 3 is movably clamped on a set position of the half retainer 5;
as shown in fig. 2, the bearing seal ring 4 includes a seal ring main body, and a skeleton 9 disposed in the seal ring main body; the seal ring main body comprises an outer seal end 401 in seal fit with the seal groove A7 and an inner seal end 402 in seal fit with the seal groove B8; the inner seal end 402 comprises a main seal ring 403, an inner seal end waist 404, an auxiliary seal ring 405 and a dustproof seal ring 406, wherein the main seal ring 403 is in interference fit with the inner side wall of the seal groove B8, and the interference magnitude along the axial direction of the bearing is as follows: 0.13mm; the inner sealing end waist part 404 is arranged in the middle of the inner sealing end 402, above the main sealing ring 403 and the dustproof sealing ring 406 and below the auxiliary sealing ring 405, and the auxiliary sealing ring 405 is in clearance fit with the outer wall of the bearing inner ring 1, so that friction resistance is prevented from being generated in the process that the bearing inner ring 1 rotates relative to the bearing outer ring 2; the main body of the bearing seal ring 4 is ACM acrylic ester waterproof rubber;
as shown in fig. 1 to 4, the seal groove B8 of the inner ring 1 includes an inner side 801, a groove bottom 802, an outer side B803, and an upper end extension 804 of the outer side B803, the inner end of the framework 9 of the bearing seal ring 4 extends toward the inner seal end 402 to generate a certain pressure on the inner seal end 402, the distance M between the inner end of the framework 9 and the upper end extension 804 of the outer side B803 is 1.05mm, the adhesion degree between the main seal ring 403 and the dust seal ring 406 and the seal groove B8 is effectively controlled, and the sealing performance of the bearing is improved; the height N of the inner sealing end waist part 404 is 0.25mm, and the starting torque of the bearing can be effectively controlled by controlling the height size of the inner sealing end waist part 404, so that the sealing performance of the bearing is improved;
the dustproof sealing ring 406 is arranged above the upper end extension part 804 of the sealing groove B8, the lower end part of the dustproof sealing ring 406 is in interference fit with the upper end extension part 804 of the sealing groove B8, and the interference magnitude along the radial direction of the bearing is 0.05-0.1mm; the dustproof sealing ring 406 can effectively prevent external substances such as water, silt and the like from entering the interior of the bearing, and avoids the influence on the sealing performance of the bearing caused by the deformation of the main sealing ring 403 due to the influence of foreign objects on the main sealing ring 403; the included angle alpha between the inner side surface 801 and the radial line of the bearing is 10 degrees, the included angle beta between the outer side surface and the radial line of the bearing is 30 degrees, and the inner sealing end 402 of the bearing sealing ring 4 can be in optimal tight fit with the sealing groove B8;
as shown in fig. 3 and 4, the surface of the sealing groove B8 of the inner ring 1 is a high-precision surface after finishing and grinding by a diamond roller, the roughness of the grinding surface is less than or equal to ra0.63, the size dispersion and the roughness are greatly reduced, the sealing groove is more tightly attached to the lip of the sealing ring, and the waterproof performance is greatly improved.
As shown in fig. 1, the diameter phi 1 of the outer ring 2 is 40mm, the height S of the outer ring 2 is 12mm, and an included angle gamma between the outer side edge of the seal groove A7 and a radial line is 45 degrees; the sealed space 10 formed between the outer ring 2 and the inner ring 1 can prevent grease leakage.
As shown in fig. 1 and 2, the interference between the dust seal 406 and the upper end extension 804 of the outer side surface B803 in the radial direction of the bearing is 0.08mm, and the proper interference determines the sealing performance and the starting torque of the bearing.
As shown in fig. 1, the radial projection of the inner seal end 402 on the bearing inner ring 1 completely covers the seal groove B8, and under the condition of high-speed rotation, in the guiding action of the secondary seal ring 405 during the backflow of the grease, the grease flows to the outer wall of the bearing inner ring 1 and does not enter the seal groove B8, so that the risk of leakage of the grease is reduced, and the grease is ensured to be in an effective working state.
As shown in fig. 1, a sealed cavity 11 is formed between the inner sealing end 402 of the sealing ring body and the sealing groove B8, which can prevent external moisture and dust from entering the bearing sealing ring 4.
As shown in fig. 4, the outer diameter Φ 2 of the inner ring 1 is 24.4mm, the diameter Φ 3 of the circle where the extension 804 of the upper end of the inner ring 1 is located is 23.5mm, which is smaller than the outer diameter of the inner ring 1, and the diameter Φ 4 of the circle where the groove bottom 802 of the inner ring 1 is located is 22.6mm; when the bearing bears external liquid pressure, the inner sealing end 402 can be tightly attached to the dust-proof groove B, so that the sealing performance is better, and the protection capability is stronger.
As shown in fig. 5 and 6, the seal groove A7 of the outer ring 2 includes an outer surface a 701.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the ordinary changes and replacements within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. A waterproof bearing for a motor comprises an inner ring, an outer ring, a steel ball, a bearing sealing ring, a half retainer and a rivet, wherein a sealing groove A is arranged at the edge of the inner wall of the outer ring, a sealing groove B is arranged at the edge of the outer wall of the inner ring, and the sealing groove B and the sealing groove A correspond to each other; the half retainer is fixed on a raceway between the inner ring and the outer ring through rivets, and the steel ball is movably clamped on a set position of the half retainer;
the bearing sealing ring comprises a sealing ring main body and a framework arranged in the sealing ring main body; the sealing ring main body comprises an outer sealing end in sealing fit with the sealing groove A and an inner sealing end in sealing fit with the sealing groove B; interior sealed end includes main seal circle, interior sealed end waist, vice sealing washer and dust seal, main seal circle is interference fit with the inside wall of seal groove B, and the magnitude of interference along bearing axial direction is: 0.1-0.15mm; the waist part of the inner sealing end is arranged in the middle of the inner sealing end, above the main sealing ring and the dustproof sealing ring and below the auxiliary sealing ring, and the auxiliary sealing ring is in clearance fit with the outer wall of the bearing inner ring; the method is characterized in that:
the sealing groove B of the inner ring comprises an inner side face, a groove bottom, an outer side face B and an upper end extension part of the outer side face B, the inner end of a framework of the bearing sealing ring extends towards the inner sealing end, and the distance between the inner end of the framework and the upper end extension part of the outer side face B is 1.02-1.08mm; the height of the waist part of the inner sealing end is 0.22-0.28mm;
the dustproof sealing ring is arranged above the upper end extending part of the sealing groove B, the lower end part of the dustproof sealing ring is in interference fit with the upper end extending part of the sealing groove B, and the interference magnitude along the radial direction of the bearing is 0.05-0.1mm; the included angle between the inner side face and the radial line of the bearing is 8-12 degrees, the included angle between the outer side face and the radial line of the bearing is 27-33 degrees, and the inner sealing end of the bearing sealing ring can be in optimal tight fit with the sealing groove B.
2. The waterproof bearing for the motor according to claim 1, wherein: the diameter of the outer ring is 40mm, and the height of the outer ring is 12mm.
3. The waterproof bearing for the motor according to claim 1, wherein: the distance between the end, close to the inner ring, of the framework and the upper end extending part of the outer side surface B is 1.05mm, and the height of the waist part of the inner sealing end is 0.25mm.
4. The waterproof bearing for the motor according to claim 1, wherein: the interference between the main seal ring and the inner side wall of the seal groove B along the axial direction of the bearing is as follows: 0.13mm, and the interference between the dustproof sealing ring and the upper end extension part of the outer side surface B along the radial direction of the bearing is 0.08mm.
5. The waterproof bearing for the motor according to claim 1, wherein: the radial projection of the inner sealing end on the bearing inner ring completely covers the sealing groove B.
6. The waterproof bearing for the motor according to claim 1, wherein: the included angle between the inner side face and the radial line direction of the bearing is 10 degrees, and the included angle between the outer side face and the radial line direction of the bearing is 30 degrees; and a closed cavity is formed between the inner sealing end of the sealing ring main body and the sealing groove B.
7. The waterproof bearing for the motor according to claim 1, wherein: the outer diameter of the inner ring is 24.4mm, the diameter of a circle where the extension part at the upper end of the inner ring is located is 23.5mm and is smaller than the outer diameter of the inner ring, and the diameter of a circle where the bottom of the inner ring groove is located is 22.6mm.
8. The waterproof bearing for the motor according to claim 1, wherein: the seal groove A of the outer ring comprises an outer side surface A, and an included angle between the outer side surface A and a radial line of the bearing is 45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222626977.7U CN218440265U (en) | 2022-10-05 | 2022-10-05 | Waterproof bearing for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222626977.7U CN218440265U (en) | 2022-10-05 | 2022-10-05 | Waterproof bearing for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218440265U true CN218440265U (en) | 2023-02-03 |
Family
ID=85041522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222626977.7U Active CN218440265U (en) | 2022-10-05 | 2022-10-05 | Waterproof bearing for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218440265U (en) |
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2022
- 2022-10-05 CN CN202222626977.7U patent/CN218440265U/en active Active
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