CN223411254U - Double row angular contact ball bearings for automatic tilters - Google Patents
Double row angular contact ball bearings for automatic tiltersInfo
- Publication number
- CN223411254U CN223411254U CN202423267735.9U CN202423267735U CN223411254U CN 223411254 U CN223411254 U CN 223411254U CN 202423267735 U CN202423267735 U CN 202423267735U CN 223411254 U CN223411254 U CN 223411254U
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- outer ring
- angular contact
- contact ball
- row angular
- ball bearing
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Abstract
本实用新型公开了一种用于自动倾斜器的双列角接触球轴承，包括内圈和外圈，所述内圈与外圈之间形成有两列滚道，两列滚道中分别配合有滚动体，所述外圈边沿沿周向设置有台阶槽，所述台阶槽中配合有密封唇，所述密封唇包括相连接的卡接部以及延伸部，所述卡接部卡设在台阶槽上，所述延伸部自由端抵触在内圈外壁上，所述卡接部上沿外圈径向设置有第一通气孔，所述卡接部沿外圈轴向设置有第二通气孔，所述第一通气孔和第二通气孔交错设置。其结构简单，布局合理，使用方便，具有良好的使用可靠性。
The utility model discloses a double-row angular contact ball bearing for an automatic tilt mechanism, comprising an inner ring and an outer ring. Two rows of raceways are formed between the inner and outer rings, each of which is equipped with a rolling element. A stepped groove is circumferentially provided along the edge of the outer ring, and a sealing lip is provided in the stepped groove. The sealing lip includes a connected clamping portion and an extension portion. The clamping portion is clamped to the stepped groove, and the free end of the extension portion abuts against the outer wall of the inner ring. A first ventilation hole is provided on the clamping portion along the radial direction of the outer ring, and a second ventilation hole is provided on the clamping portion along the axial direction of the outer ring. The first and second ventilation holes are arranged alternately. The utility model has a simple structure, a reasonable layout, is easy to use, and has good reliability.
Description
Technical Field
The utility model relates to a double-row angular contact ball bearing for an automatic tilting device.
Background
The double-row angular contact ball bearing is used for the automatic inclinator of the helicopter and has the characteristics of high sealing, strong reliability, simple structure, low friction moment and the like. The double-row angular contact ball bearing consists of an outer ring, an inner ring, steel balls, a sealing piece, a retainer and lubricating grease.
Because the automatic inclinator of the helicopter has overturning moment with frequent change of size and direction, in the running process of the bearing, an inner assembly formed by an inner ring, rollers and a retainer is likely to deviate relative to an outer ring, namely, the inner ring and the outer ring have certain coaxiality errors and the bearing actually needs aligning angle, so that the structure has larger requirements on the pulling-out force of a sealing element, and because the automatic inclinator bearing is required to be installed, the thickness of the inner ring and the outer ring is thinner, the framework of the sealing element is required to be shorter, the sealing element and the outer ring cannot be enabled to realize a sealing structure with enough pulling-out force and meeting the size requirement according to the conventional design, and the sealing inclined plane of the inner ring is an inclined plane, if too much lubricating oil flows into the sealing inclined plane, the increase of the interference of the inner ring and the sealing element can lead to the increase of the friction moment of the bearing, the abrasion of the inner ring and the sealing element is serious, and the interference is insufficient, so that the lubricating oil is easy to leak.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a double-row angular contact ball bearing for an automatic inclinator, which has the advantages of simple structure, reasonable layout, convenient use and good use reliability.
In order to achieve the above purpose, the utility model provides a double-row angular contact ball bearing for an automatic inclinator, which comprises an inner ring and an outer ring, wherein two rows of rollways are formed between the inner ring and the outer ring, rolling bodies are respectively matched in the two rows of rollways, a step groove is formed in the edge of the outer ring along the circumferential direction, a sealing lip is matched in the step groove, the sealing lip comprises a clamping part and an extending part, the clamping part is clamped on the step groove, the free end of the extending part is abutted against the outer wall of the inner ring, a first vent hole is formed in the clamping part along the radial direction of the outer ring, a second vent hole is formed in the clamping part along the axial direction of the outer ring, and the first vent hole and the second vent hole are arranged in a staggered manner.
The double-interference sealing structure has the beneficial effects that the double-interference sealing structure is provided with the step groove circumferentially arranged at the edge of the outer ring and the sealing lip matched with the step groove, so that the double-interference sealing effect in the axial direction and the radial direction is realized. The clamping part and the extending part of the sealing lip are respectively clamped on the step groove and are abutted against the outer wall of the inner ring, so that the sealing performance of the bearing is effectively enhanced. In addition, the first ventilation holes and the second ventilation holes are arranged on the clamping part along the radial direction of the outer ring and the second ventilation holes are arranged along the axial direction of the outer ring in a staggered manner, so that the sealing reliability is improved, the technical effects that the bearing can maintain excellent sealing performance even under extreme working conditions due to the double interference sealing design, the leakage of lubricating grease and the invasion of external pollutants are prevented, the air pressure inside the bearing is balanced by the aid of the staggered first ventilation holes and the staggered second ventilation holes, the sealing failure caused by the air pressure difference is prevented, the durability of the bearing is improved, the service life of the bearing is prolonged, the maintenance and replacement frequency is reduced, and finally, the overall stability and the running efficiency of the bearing are remarkably improved through the axial and radial double interference, and more reliable support is provided for equipment in various application scenes.
As a further arrangement of the utility model, the outer ring is provided with a skirt edge corresponding to the edge of the step groove, and a pressure relief groove is concavely formed on the contact surface of the clamping part and the skirt edge.
The beneficial effects of the arrangement are that the pressure relief groove is formed by recessing the contact surface of the clamping part and the skirt. The structure of the pressure relief groove mainly acts on the internal and external pressure of the balance bearing, when the internal pressure of the bearing is increased due to temperature rise or other factors in the operation process, the pressure relief groove can effectively relieve the pressure difference, so that the redundant gas in the bearing can be discharged through the pressure relief groove, and the sealing damage or bearing failure caused by overlarge pressure is avoided. In addition, the existence of the pressure relief groove can also ensure that the fluctuation of the internal pressure is released in time when the bearing runs at a high speed or bears impact load, so that the stability of the internal environment of the bearing is maintained, and the reliability and the durability of the bearing are improved. Meanwhile, the convenience of maintenance is also considered in the design, frequent maintenance caused by unbalanced pressure is reduced through reasonable arrangement of the pressure relief groove, the service life of the bearing is prolonged, and the operation cost of a user is reduced.
As a further arrangement of the utility model, the outer edge of the inner ring is provided with a stepped groove, the free end of the extension part is provided with a folded edge, and the folded edge is abutted against the side wall of the stepped groove.
The anti-dust bearing has the beneficial effects that the arrangement is that the stepped groove formed at the outer edge of the inner ring is combined with the folded edge formed at the free end of the extension part, so that the anti-dust effect is enhanced, the folded edge is abutted against the side wall of the stepped groove, an additional physical barrier is formed, and external dust and particles are effectively prevented from entering the bearing through the sealing gap. The structure not only improves the sealing performance, but also can effectively prevent dust and other hard particles from invading even in a severe working environment, and also enhances the protection capability, protects lubricating grease and rolling elements in the bearing, and prolongs the service life of the bearing. Meanwhile, the design simplifies the maintenance process, and the cleanliness of the inside of the bearing is maintained due to the improvement of the dustproof effect, so that abrasion caused by dust and grease pollution are reduced, and the maintenance frequency and difficulty are reduced. In addition, the structure improves the reliability of the bearing, reduces faults and downtime caused by dust invasion, has strong adaptability, is suitable for various bearing configurations, and can provide effective dustproof protection no matter applied to low-speed heavy load or high-speed light load. Meanwhile, the lubricating period is prolonged, the number of times of replacing lubricating grease is reduced, the cost is saved, the overall operation cost is reduced by reducing the frequency of maintaining and replacing parts, and the economic benefit is improved.
As a further arrangement of the utility model, a skeleton is arranged in the sealing lip, the skeleton comprises a radial part arranged along the radial direction of the outer ring and an axial part arranged along the axial direction of the outer ring, the clamping part is connected to the axial part, the extension part is connected to the radial part, and the folded edge is connected to the tail end of the radial part.
The sealing lip has the beneficial effects that the structure is provided with the framework in the sealing lip, the framework comprises the radial part arranged along the radial direction of the outer ring and the axial part arranged along the axial direction of the outer ring, the clamping part is connected to the axial part, the extension part is connected to the radial part, and the edge folding design of the tail end of the radial part obviously enhances the structural strength of the sealing element. The sealing performance is improved, reliable sealing under high-pressure or high-speed rotation conditions is ensured, lubricating oil leakage and external pollutant entering are prevented, the wear resistance is improved, and the service life of the sealing element is prolonged. Meanwhile, the arrangement of the framework is favorable for keeping the shape stability of the sealing lip, improving the fatigue resistance and facilitating the installation and the disassembly. In addition, the skeleton structure can absorb and disperse external impact force, optimize load distribution and prevent excessive compression, so that the impact resistance and the reliability of the whole structure are improved. The design enables the sealing lip to adapt to equipment with different sizes and specifications, increases the application range, reduces the equipment shutdown and maintenance times caused by sealing failure, reduces the maintenance cost and provides powerful guarantee for the stable operation of the equipment.
As a further arrangement of the utility model, oil holes are arranged between the corresponding two rows of raceways on the outer ring, and plug bodies are matched on the oil holes.
The lubricating oil filling device has the beneficial effects that the lubricating oil filling device improves the maintenance efficiency, enables lubricating oil to be directly filled into a part to be lubricated by arranging the oil filling holes between two rows of raceways, greatly simplifies the maintenance flow, improves the maintenance efficiency, can periodically and conveniently fill oil, ensures that equipment operates under good lubrication conditions, effectively reduces abrasion, prolongs the service life of the equipment, ensures that the lubricating oil is uniformly distributed between the raceways, avoids local abrasion caused by uneven lubrication, and further cooperates with the design of the oil filling holes of the plug body, can effectively seal an oil way during non-oiling, prevent dust, impurities and the like from entering, and reduce the risk of oil pollution.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
Fig. 2 is an enlarged view of a portion of the seal lip position in an embodiment of the present utility model.
Detailed Description
The utility model provides an embodiment of a double-row angular contact ball bearing for an automatic inclinator, as shown in fig. 1 to 2, the double-row angular contact ball bearing comprises an inner ring 1 and an outer ring 2, two rows of rolling paths are formed between the inner ring 1 and the outer ring 2, rolling bodies 3 are respectively matched in the two rows of rolling paths, a step groove 22 is formed in the edge of the outer ring 2 along the circumferential direction, a sealing lip 4 is matched in the step groove 22, the sealing lip 4 comprises a clamping part 41 and an extending part 42 which are connected, the clamping part 41 is clamped on the step groove 22, the free end of the extending part 42 is abutted against the outer wall of the inner ring 1, a first vent 411 is formed in the clamping part 41 along the radial direction of the outer ring 2, a second vent 412 is formed in the axial direction of the outer ring 2, and the first vent 411 and the second vent 412 are arranged in a staggered manner. The arrangement has the beneficial effects that the step groove 22 circumferentially arranged on the edge of the outer ring 2 and the sealing lip 4 matched with the step groove realize the axial and radial double interference sealing effect. The clamping part 41 and the extending part 42 of the sealing lip 4 are respectively clamped on the step groove 22 and are abutted against the outer wall of the inner ring 1, so that the sealing performance of the bearing is effectively enhanced. In addition, the first ventilation holes 411 and the second ventilation holes 412 which are arranged along the radial direction of the outer ring 2 and the second ventilation holes 412 which are arranged along the axial direction of the outer ring 2 on the clamping portion 41 are arranged alternately, so that the sealing reliability is improved, the technical effects of ensuring that the bearing can maintain excellent sealing performance even under extreme working conditions through double interference, preventing grease leakage and invasion of external pollutants are achieved through the double interference sealing design, balancing the air pressure inside the bearing through the first ventilation holes 411 and the second ventilation holes 412 which are arranged alternately, preventing sealing failure caused by air pressure difference are achieved, and the durability of the bearing is improved, the service life of the bearing is prolonged, the maintenance and replacement frequency is reduced, and finally, the overall stability and the running efficiency of the bearing are remarkably improved through axial and radial double interference, and more reliable support is provided for equipment in various application scenes.
As a further arrangement of the present embodiment, the outer ring 2 is provided with a skirt 23 corresponding to the edge of the step groove 22, and a pressure relief groove 413 is formed in a recessed manner on the contact surface of the engagement portion 41 and the skirt 23. The beneficial effect of this arrangement is that the pressure relief groove 413 is formed by recessing on the contact surface of the clamping part 41 and the skirt 23. The structure of the pressure relief groove 413 mainly acts on the internal and external pressure of the balance bearing, when the internal pressure of the bearing is increased due to temperature rise or other factors in the operation process, the pressure relief groove 413 can effectively relieve the pressure difference, so that the redundant gas in the bearing can be discharged through the pressure relief groove 413, and the sealing damage or the bearing failure caused by overlarge pressure is avoided. In addition, the existence of the pressure relief groove 413 can also ensure that the fluctuation of the internal pressure is released in time when the bearing runs at a high speed or bears impact load, so that the stability of the internal environment of the bearing is maintained, and the reliability and the durability of the bearing are improved. Meanwhile, the convenience of maintenance is also considered in the design, frequent maintenance caused by unbalanced pressure is reduced, the service life of the bearing is prolonged, and the operation cost of a user is reduced through reasonable arrangement of the pressure relief groove 413.
As a further arrangement of this embodiment, the outer edge of the inner ring 1 is formed with a stepped groove 11, and the free end of the extension portion 42 is formed with a folded edge 421, and the folded edge 421 abuts against the sidewall of the stepped groove 11. The arrangement has the beneficial effects that the step groove 11 formed at the outer edge of the inner ring 1 is combined with the folded edge 421 formed at the free end of the extension part 42, so that the dustproof effect is enhanced, the folded edge 421 is abutted against the side wall of the step groove 11, an additional physical barrier is formed, and external dust and particles are effectively prevented from entering the bearing through the sealing gap. The structure not only improves the sealing performance, but also can effectively prevent dust and other hard particles from invading even in a severe working environment, and also enhances the protection capability, protects lubricating grease and rolling elements in the bearing, and prolongs the service life of the bearing. Meanwhile, the design simplifies the maintenance process, and the cleanliness of the inside of the bearing is maintained due to the improvement of the dustproof effect, so that abrasion caused by dust and grease pollution are reduced, and the maintenance frequency and difficulty are reduced. In addition, the structure improves the reliability of the bearing, reduces faults and downtime caused by dust invasion, has strong adaptability, is suitable for various bearing configurations, and can provide effective dustproof protection no matter applied to low-speed heavy load or high-speed light load. Meanwhile, the lubricating period is prolonged, the number of times of replacing lubricating grease is reduced, the cost is saved, the overall operation cost is reduced by reducing the frequency of maintaining and replacing parts, and the economic benefit is improved.
As a further arrangement of the present embodiment, a skeleton 5 is provided in the seal lip 4, the skeleton 5 includes a radial portion 52 provided along the radial direction of the outer ring 2 and an axial portion 51 provided along the axial direction of the outer ring 2, the engagement portion 41 is connected to the axial portion 51, the extension portion 42 is connected to the radial portion 52, and the flange 421 is connected to the end of the radial portion 52. The sealing lip 4 has the beneficial effects that the structure is provided with the framework 5 in the sealing lip 4, the framework comprises the radial part 52 arranged along the radial direction of the outer ring 2 and the axial part 51 arranged along the axial direction of the outer ring 2, the clamping part 41 is connected to the axial part 51, the extension part 42 is connected to the radial part 52, and the design of the folded edge 421 at the tail end of the radial part 52 is adopted, so that the structural strength of the sealing element is remarkably enhanced. The sealing performance is improved, reliable sealing under high-pressure or high-speed rotation conditions is ensured, lubricating oil leakage and external pollutant entering are prevented, the wear resistance is improved, and the service life of the sealing element is prolonged. Meanwhile, the arrangement of the framework 5 is beneficial to keeping the shape stability of the sealing lip 4, improving the fatigue resistance and facilitating the installation and the disassembly. In addition, the skeleton 5 structure can absorb and disperse external impact force, optimize load distribution and prevent excessive compression, so that the impact resistance and the reliability of the whole structure are improved. The sealing lip 4 can adapt to equipment with different sizes and specifications, the application range is increased, the equipment shutdown and maintenance times caused by sealing failure are reduced, the maintenance cost is reduced, and a powerful guarantee is provided for the stable operation of the equipment.
As a further arrangement of the present embodiment, oil holes 21 are provided between two corresponding rows of raceways on the outer ring 2, and a plug body is fitted on the oil holes 21. The lubricating oil filling device has the beneficial effects that the maintenance efficiency is improved, the lubricating oil can be directly filled into a part to be lubricated by arranging the oil filling holes 21 between two rows of raceways, the maintenance flow is greatly simplified, the maintenance efficiency is improved, meanwhile, the lubricating oil filling device can be used for periodically and conveniently filling oil, the running of the device under good lubricating conditions can be ensured, the abrasion is effectively reduced, the service life of the device is prolonged, the design position of the oil filling holes 21 can ensure that the lubricating oil is uniformly distributed among the raceways, the local abrasion caused by uneven lubrication is avoided, and the lubricating oil filling device can be further matched with the design of the oil filling holes 21 of a plug body, so that an oil way can be effectively sealed during non-oiling, dust, impurities and the like are prevented from entering, and the risk of oil pollution is reduced.
The above examples are only one of the preferred embodiments of the present utility model, and the ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.
Claims (5)
1. The double-row angular contact ball bearing for the automatic inclinator comprises an inner ring and an outer ring, two rows of rollways are formed between the inner ring and the outer ring, rolling bodies are respectively matched in the two rows of rollways, and the double-row angular contact ball bearing is characterized in that a step groove is formed in the edge of the outer ring along the circumferential direction, a sealing lip is matched in the step groove, the sealing lip comprises a clamping part and an extending part, the clamping part is clamped on the step groove, the free end of the extending part is abutted against the outer wall of the inner ring, a first vent hole is formed in the clamping part along the radial direction of the outer ring, a second vent hole is formed in the clamping part along the axial direction of the outer ring, and the first vent hole and the second vent hole are arranged in a staggered manner.
2. The double row angular contact ball bearing for an automatic tilting apparatus according to claim 1, wherein the outer ring is provided with a skirt corresponding to the edge of the step groove, and a pressure relief groove is formed in the contact surface of the clamping part and the skirt in a recessed manner.
3. The double row angular contact ball bearing for an automatic recliner of claim 2 wherein said inner race has a stepped groove formed in an outer edge thereof and said extension has a free end formed with a hem which abuts against a sidewall of the stepped groove.
4. A double row angular contact ball bearing for an automatic recliner as set forth in claim 3 wherein said seal lip has a skeleton disposed therein, said skeleton including a radial portion disposed radially along the outer race and an axial portion disposed axially along the outer race, said snap-fit portion being connected to the axial portion, said extension portion being connected to the radial portion, said flange being connected to the distal end of the radial portion.
5. The double row angular contact ball bearing for an automatic recliner of claim 1 wherein oil holes are formed in the outer race between corresponding two rows of raceways, and plugs are fitted in the oil holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423267735.9U CN223411254U (en) | 2024-12-27 | 2024-12-27 | Double row angular contact ball bearings for automatic tilters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423267735.9U CN223411254U (en) | 2024-12-27 | 2024-12-27 | Double row angular contact ball bearings for automatic tilters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223411254U true CN223411254U (en) | 2025-10-03 |
Family
ID=97206278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202423267735.9U Active CN223411254U (en) | 2024-12-27 | 2024-12-27 | Double row angular contact ball bearings for automatic tilters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223411254U (en) |
-
2024
- 2024-12-27 CN CN202423267735.9U patent/CN223411254U/en active Active
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