CN113464565A - Non-contact type sealing bearing - Google Patents
Non-contact type sealing bearing Download PDFInfo
- Publication number
- CN113464565A CN113464565A CN202110818551.9A CN202110818551A CN113464565A CN 113464565 A CN113464565 A CN 113464565A CN 202110818551 A CN202110818551 A CN 202110818551A CN 113464565 A CN113464565 A CN 113464565A
- Authority
- CN
- China
- Prior art keywords
- ring
- sealing
- raceway
- sealed bearing
- step surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer race
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention provides a non-contact type sealing bearing which comprises an outer ring, an inner ring and a sealing ring, wherein a raceway is formed between the outer ring and the inner ring, the sealing ring is connected to the outer ring, the outer peripheral wall of the inner ring is in a boss shape and is provided with first step surfaces positioned at two axial sides, the radial section of each first step surface is linear, a check ring is sleeved at the position, far away from the raceway, of each first step surface, the check ring can cover a spacing section between the outer ring and the inner ring, the sealing ring comprises a main body and a sealing lip, and the sealing lip is arranged at the inner peripheral wall of the main body and is in clearance fit with the first step surfaces. Aiming at the defects of the prior art, the invention provides the non-contact type sealing bearing which is low in processing difficulty, stable in running state and good in sealing effect.
Description
Technical Field
The invention relates to a non-contact type sealing bearing.
Background
The bearing is an important part for the rotation support of a mechanical body, and generally comprises an outer ring, an inner ring, a sealing ring and a plurality of rollers, wherein a roller path for accommodating the plurality of rollers in a rolling way is formed between the outer ring and the inner ring, the sealing ring is arranged on two sides of the axial direction of the roller path and used for protecting the rolling environment of the rollers, and the sealing ring can be divided into a contact type sealing bearing and a non-contact type sealing bearing according to whether the sealing ring is contacted with the outer ring and the inner ring simultaneously or not, the two sides of the inner ring of the non-contact type bearing in the prior art are both provided with annular grooves with hook-shaped sections, the lip part of the sealing ring extends into the annular groove and is in clearance fit with the inner wall of the annular groove to form a sealing clearance, the sealing ring and the ferrule are prevented from being contacted and rubbed and have certain dustproof and antifouling capacity, the non-contact type sealing bearing is suitable for occasions requiring high/high-speed rotation of rotating torque, but the non-contact type sealing bearing in the prior art, the shape of the hook-shaped annular groove is complex, the roughness and the ovality of the bottom surface of the groove are difficult to control, and the generated machining error is large; and when the external force with larger external dirt impacts/the bearing runs, the lip of the sealing ring can swing under the change of the internal force, and the interval is smaller in order to ensure the sealing effect of the sealing gap, so that a semi-contact and semi-non-contact state is easily formed between the inner wall of the ring groove and the sealing ring, and larger friction torque is generated.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the non-contact type sealing bearing which is low in processing difficulty, stable in running state and good in sealing effect.
In order to achieve the purpose, the invention provides a non-contact type sealing bearing which comprises an outer ring, an inner ring and a sealing ring, wherein a raceway is formed between the outer ring and the inner ring, the sealing ring is connected to the outer ring, the outer peripheral wall of the inner ring is in a boss shape and is provided with first step surfaces positioned at two axial sides, the radial section of each first step surface is in a straight shape, a retaining ring is sleeved at the position, far away from the raceway, of each first step surface, the retaining ring can cover a spacing section between the outer ring and the inner ring, the sealing ring comprises a main body and a sealing lip, and the sealing lip is arranged at the inner peripheral wall of the main body and is in clearance fit with the first step surfaces.
The technical scheme has the advantages that: the outer peripheral wall of the inner ring is set to be in a boss shape, the first steps on two sides are set to be in a radial section and are in a linear shape, the sealing lip and the first steps are in clearance fit, the effect of reducing the processing difficulty can be achieved, fine processing is easy to achieve, the bearing is guaranteed to be in an operating state, the sealing ring and the inner ring can be well controlled to be in a non-contact state with a small clearance, then the sealing ring is utilized to cover the interval part between the outer ring and the inner ring, external dirt is prevented from impacting the sealing ring, stability in the operating state is further guaranteed, and the sealing effect is guaranteed.
The invention may further be arranged to: the inner ring comprises a second step surface, the raceway is composed of the second step surface and the outer ring, a connecting wall is arranged between the second step surface and the first step surface, and the sealing lip extends towards the direction of the connecting wall.
By further arranging, the sealing lip arranged on the inner peripheral wall of the main body and close to the first step surface extends towards the direction of the connecting wall arranged between the second step surface and the first step surface, the length of the gap is prolonged while the sealing lip is in clearance fit with the first step surface, and when the sealing lip is close to the connecting wall, the gap formed by the connecting wall and the sealing lip is further increased, so that an L-shaped gap seal is integrally formed.
The invention may further be arranged to: the sealing ring comprises an annular extending part, the extending part is arranged on one side, facing the raceway, of the sealing ring and close to the sealing lip, and the extending part extends towards the direction of the second step surface.
Through further setting up, set up the extension in the sealing washer one side department towards the raceway to extend the extension towards second step face direction, can cover the interval part formation between sealing washer and the connecting wall, on the one hand, further strengthen sealed effect, on the other hand, the setting of extension can block the lubricating grease formation that outwards spills over, prevents the loss of lubricating grease.
The invention may further be arranged to: the extension part is provided with an inclined ring surface, and the inclined ring surface is arranged in an inclined manner towards the direction of the outer ring.
By further providing the inclined ring surface inclined beyond the outer ring on the extension portion, the lubricating oil contacting with the inclined ring surface can be thrown to the raceway.
The invention may further be arranged to: the radial cross section of the connecting wall is obliquely arranged, the sealing lip and the extending part respectively extend to the positions close to the two ends of the connecting wall, and a concave part is formed between the extending part and the sealing lip.
By further arrangement, the sealing lip and the extension part are respectively arranged at the two ends close to the connecting wall, and the sealing effect is further enhanced.
The invention may further be arranged to: the retaining ring comprises a ring surface, the ring surface is arranged at one side of the retaining ring facing the raceway, the radial section of the ring surface is in an inverted ㄣ shape, one end of the ring surface is connected to the inner ring, the other end of the ring surface extends to the position close to the axial end face of the outer ring, and the ring surface is in clearance fit with the outer ring and the sealing ring.
Through further setting, be the ㄣ font through setting up the anchor ring, and the one end of anchor ring is connected in inner circle department, and the other end setting of anchor ring is in the axial terminal surface department that is close to the outer lane for when the anchor ring is connected in the inner circle, can all keep less distance and clearance fit with outer lane, sealing washer, further strengthen the holistic sealed effect of bearing.
The invention may further be arranged to: the retainer ring comprises a weight reducing groove, the weight reducing groove is formed in the other side of the retainer ring, and the weight reducing groove is formed in the position, close to the outer peripheral wall, of the retainer ring.
Through further setting, the whole shape of cooperation retaining ring when losing weight to the retaining ring, guarantees holistic thickness and even.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of portion a of FIG. 1 according to an embodiment of the present invention;
FIG. 3 is an enlarged view of portion b of FIG. 1 according to an embodiment of the present invention;
wherein: an outer ring 1; an inner ring 2; a first step surface 21; a second step surface 22; a connecting wall 23; a seal ring 3; a main body 31; a sealing lip 32; an extension 33; an inclined torus 331; a recess 34; a retainer ring 4; an annulus 41; the weight-reducing slots 42.
Detailed Description
An embodiment of a non-contact sealed bearing of the present invention is shown in fig. 1-3: in this example, adopt outer lane rotation and the fixed gyro wheel bearing of inner circle to indicate, it is including outer lane 1, inner circle 2 and sealing washer 3, outer lane 1 and inner circle 2 between be formed with the raceway, sealing washer 3 connect on outer lane 1, 2 periphery walls of inner circle are the boss form and are formed with the first step 21 that is located axial both sides department, the radial cross-section of first step 21 is the linearity, and first step 21 keeps away from raceway department cover and is equipped with retaining ring 4, retaining ring 4 can cover the interval section formation between outer lane 1 and the inner circle 2, sealing washer 3 including main part 31 and seal lip 32, seal lip 32 set up in main part 31 the internal perisporium department and with clearance fit between the first step 21. The inner ring 2 comprises a second step surface 22, the raceway is formed by the second step surface 22 and the outer ring 1, a connecting wall 23 is arranged between the second step surface 22 and the first step surface 21, and the sealing lip 32 extends towards the connecting wall 23. The sealing ring 3 comprises an annular extension part 33, the extension part 33 is arranged on one side of the raceway of the sealing ring 3 close to the sealing lip 32, and the extension part 33 extends towards the second step surface 22. The extension 33 is provided with an inclined ring surface 331, and the inclined ring surface 331 is inclined towards the outer ring 1. The radial section of the connecting wall 23 is inclined, the sealing lip 32 and the extending portion 33 extend to the positions close to the two ends of the connecting wall 23, and a concave portion 34 is formed between the extending portion 33 and the sealing lip 32. The retaining ring 4 include the anchor ring 41, the anchor ring 41 set up in retaining ring 4 towards one side department of raceway, and the radial cross-section of anchor ring 41 is the shape of falling ㄣ font, the one end of anchor ring 41 is connected on inner circle 2, the other end of anchor ring 41 extends to the axial terminal surface department that is close to outer lane 1, and be clearance fit between anchor ring 41 and outer lane 1, the sealing washer 3. The retainer ring 4 comprises a weight-reducing groove 42, the weight-reducing groove 42 is arranged at the other side of the retainer ring 4, and the weight-reducing groove 42 is arranged at the position, close to the outer peripheral wall, of the retainer ring 4.
The above example is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a non-contact sealed bearing, is including outer lane, inner circle and sealing washer, outer lane and inner circle between be formed with the raceway, the sealing washer connect on the outer lane, its characterized in that: the inner circle periphery wall is the boss form and is formed with the first step face that is located axial both sides department, the radial cross section of first step face is the linearity, and first step face keeps away from raceway department cover and is equipped with the retaining ring, the retaining ring can form to the interval section between outer lane and the inner circle and cover, the sealing washer including main part and seal lip, the seal lip set up in the internal perisporium department of main part and with clearance fit between the first step face.
2. The non-contact sealed bearing of claim 1, wherein: the inner ring comprises a second step surface, the raceway is composed of the second step surface and the outer ring, a connecting wall is arranged between the second step surface and the first step surface, and the sealing lip extends towards the direction of the connecting wall.
3. The non-contact sealed bearing of claim 2, wherein: the sealing ring comprises an annular extending part, the extending part is arranged on one side, facing the raceway, of the sealing ring and close to the sealing lip, and the extending part extends towards the direction of the second step surface.
4. The non-contact sealed bearing of claim 3, wherein: the extension part is provided with an inclined ring surface, and the inclined ring surface is arranged in an inclined manner towards the direction of the outer ring.
5. The non-contact sealed bearing of claim 2 or 3 or 4, wherein: the radial cross section of the connecting wall is obliquely arranged, the sealing lip and the extending part respectively extend to the positions close to the two ends of the connecting wall, and a concave part is formed between the extending part and the sealing lip.
6. The non-contact sealed bearing of claim 1 or 2 or 3 or 4, wherein: the retaining ring comprises a ring surface, the ring surface is arranged at one side of the retaining ring facing the raceway, the radial section of the ring surface is in an inverted ㄣ shape, one end of the ring surface is connected to the inner ring, the other end of the ring surface extends to the position close to the axial end face of the outer ring, and the ring surface is in clearance fit with the outer ring and the sealing ring.
7. The non-contact sealed bearing of claim 6, wherein: the retainer ring comprises a weight reducing groove, the weight reducing groove is formed in the other side of the retainer ring, and the weight reducing groove is formed in the position, close to the outer peripheral wall, of the retainer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110818551.9A CN113464565A (en) | 2021-07-20 | 2021-07-20 | Non-contact type sealing bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110818551.9A CN113464565A (en) | 2021-07-20 | 2021-07-20 | Non-contact type sealing bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113464565A true CN113464565A (en) | 2021-10-01 |
Family
ID=77881455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110818551.9A Pending CN113464565A (en) | 2021-07-20 | 2021-07-20 | Non-contact type sealing bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113464565A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771800A (en) * | 2023-06-07 | 2023-09-19 | 杭州人本轴承有限公司 | Sealing bearing outer baffle connecting structure and assembling method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196877A (en) * | 2014-07-28 | 2014-12-10 | 洛阳维斯格轴承有限公司 | Constant-section ultrathin-wall bearing seal structure |
| CN204239483U (en) * | 2014-11-13 | 2015-04-01 | 上海人本双列轴承有限公司 | A kind of sealing configuration of farm machinery bearing and dust cover thereof |
| CN204533223U (en) * | 2015-03-31 | 2015-08-05 | 杭州人本大型轴承有限公司 | Bearing seal structure and seal ring thereof |
| CN205578509U (en) * | 2016-03-11 | 2016-09-14 | 泛科轴承集团有限公司 | Modified insert bearing sealing device |
| CN205654718U (en) * | 2016-05-18 | 2016-10-19 | 杭州人本电机轴承有限公司 | Sealing structure for bearing with spherical outside surface |
| CN106884877A (en) * | 2017-04-10 | 2017-06-23 | 无锡市海峰海林精工机械制造有限公司 | A kind of automobile engine anti-gas-leak bearing seal structure |
| CN208281377U (en) * | 2018-04-09 | 2018-12-25 | 奥新（厦门）轴承有限公司 | A kind of multi-lip seal bearing |
| CN212775162U (en) * | 2020-08-26 | 2021-03-23 | 优可拓(青岛)机械进出口有限公司 | Wheel hub bearing of high reliable leakproofness |
-
2021
- 2021-07-20 CN CN202110818551.9A patent/CN113464565A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196877A (en) * | 2014-07-28 | 2014-12-10 | 洛阳维斯格轴承有限公司 | Constant-section ultrathin-wall bearing seal structure |
| CN204239483U (en) * | 2014-11-13 | 2015-04-01 | 上海人本双列轴承有限公司 | A kind of sealing configuration of farm machinery bearing and dust cover thereof |
| CN204533223U (en) * | 2015-03-31 | 2015-08-05 | 杭州人本大型轴承有限公司 | Bearing seal structure and seal ring thereof |
| CN205578509U (en) * | 2016-03-11 | 2016-09-14 | 泛科轴承集团有限公司 | Modified insert bearing sealing device |
| CN205654718U (en) * | 2016-05-18 | 2016-10-19 | 杭州人本电机轴承有限公司 | Sealing structure for bearing with spherical outside surface |
| CN106884877A (en) * | 2017-04-10 | 2017-06-23 | 无锡市海峰海林精工机械制造有限公司 | A kind of automobile engine anti-gas-leak bearing seal structure |
| CN208281377U (en) * | 2018-04-09 | 2018-12-25 | 奥新（厦门）轴承有限公司 | A kind of multi-lip seal bearing |
| CN212775162U (en) * | 2020-08-26 | 2021-03-23 | 优可拓(青岛)机械进出口有限公司 | Wheel hub bearing of high reliable leakproofness |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771800A (en) * | 2023-06-07 | 2023-09-19 | 杭州人本轴承有限公司 | Sealing bearing outer baffle connecting structure and assembling method |
| CN116771800B (en) * | 2023-06-07 | 2024-01-30 | 杭州人本轴承有限公司 | Sealing bearing outer baffle connecting structure and assembling method |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211001 |