CN113090649A - Cylindrical roller bearing with detachable retainer ring - Google Patents

Cylindrical roller bearing with detachable retainer ring Download PDF

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Publication number
CN113090649A
CN113090649A CN202110295704.6A CN202110295704A CN113090649A CN 113090649 A CN113090649 A CN 113090649A CN 202110295704 A CN202110295704 A CN 202110295704A CN 113090649 A CN113090649 A CN 113090649A
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CN
China
Prior art keywords
bearing
oil
ring
retaining ring
closing plate
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Granted
Application number
CN202110295704.6A
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Chinese (zh)
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CN113090649B (en
Inventor
逄博
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Shanghai C&U Group Co Ltd
C&U Co Ltd
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Shanghai C&U Group Co Ltd
C&U Co Ltd
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Priority to CN202110295704.6A priority Critical patent/CN113090649B/en
Publication of CN113090649A publication Critical patent/CN113090649A/en
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Publication of CN113090649B publication Critical patent/CN113090649B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/66Special parts or details in view of lubrication
    • F16C33/6603Special parts or details in view of lubrication with grease as lubricant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/66Special parts or details in view of lubrication
    • F16C33/6603Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6629Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86Optimisation of rolling resistance, e.g. weight reduction 

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a cylindrical roller bearing with a detachable check ring, which comprises a bearing outer ring, a bearing inner ring and a check ring, wherein a plurality of rollers are arranged between the bearing outer ring and the bearing inner ring in a rolling manner, the check ring is attached to the side wall of the bearing outer ring, the check ring and the bearing outer ring are detachably connected through a connecting piece, a filling groove is formed in the direction from the side wall to the inner peripheral wall of the bearing outer ring, a filling block used for being inserted into the filling groove extends towards the direction of the filling groove by the check ring, a contact surface used for being in contact with the rollers is formed in the inner peripheral wall of the filling block, the contact surface and the inner peripheral wall of the bearing outer ring are arranged on the same horizontal plane, and an oil supplementing piece used for supplementing oil to. The invention solves the problems that the cylindrical roller bearing in the prior art is difficult to axially position and the roller is dry-rotated due to the fact that grease is easily consumed too fast through common axial positioning.

Description

Cylindrical roller bearing with detachable retainer ring
Technical Field
The invention relates to the technical field of bearings, in particular to a cylindrical roller bearing with a detachable check ring.
Background
The bearing is an important part in the modern mechanical equipment, and can be arranged at a mechanical rotating place, and the main function of the bearing is to support the rotating body, reduce the friction coefficient in the moving process and ensure the rotation precision of the rotating body. With the development of manufacturing industry, the requirements of various mechanical complete machines on bearings also appear to be specific, for example: tapered roller bearings have an outer race flange configuration that is commonly used for axial positioning. The existing cylindrical roller bearing has the following structures: NU, NJ, NUP, N, NF, NH etc. structure, its structure has an advantage: the bearing assembling process is simple, and the bearing assembling is simple no matter in a structure with a retaining ring or a structure with an inner diameter and an outer diameter having installation inclination. However, there is a problem that the cylindrical roller bearing does not have a structure in which the outer ring is axially positioned at present. If design into the structure similar with tapered roller bearing flange structure, it is first of all that the forging degree of difficulty of bearing can increase to be the first thing, flange structure can influence the assembly of bearing in addition, and in bearing operation process, the increase that can lead to the whole consumption of bearing to increase because of flange structure's increase, and the increase of consumption then can increase the grease consumption on roller surface, the roller then can appear the dry-running phenomenon when roller surface grease consumption is totally done up, in the long term, the roller surface can appear damaged or even the whole damage of roller, lead to the bearing inefficacy.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a cylindrical roller bearing with a detachable check ring, and aims to solve the problems that the cylindrical roller bearing in the prior art is difficult to axially position and the roller is dry-rotated due to the fact that grease is easily consumed too fast through common axial positioning.
In order to achieve the purpose, the invention provides a cylindrical roller bearing with a detachable check ring, which comprises a bearing outer ring, a bearing inner ring and the check ring, wherein a plurality of rollers are arranged between the bearing outer ring and the bearing inner ring in a rolling manner, the check ring is attached to the side wall of the bearing outer ring, the check ring and the bearing outer ring are detachably connected through a connecting piece, a filling groove is formed in the direction from the side wall to the inner peripheral wall of the bearing outer ring, a filling block used for being inserted into the filling groove extends towards the direction of the filling groove by the check ring, a contact surface used for being contacted with the rollers is formed in the inner peripheral wall of the filling block, the contact surface and the inner peripheral wall of the bearing outer ring are arranged on the same horizontal plane, and an oil supplementing piece used for supplementing oil.
The technical scheme is adopted, and the method has the advantages that: in the traditional NFP cylindrical roller bearing structure, an outer ring flat retainer ring has no flange, the positioning requirement cannot be met under the condition of special axial positioning, and simultaneously, the flat retainer ring is in clearance fit with a shaft, so that the bearing is unstable in the operation process; the arrangement of the retainer ring in the technology solves the axial positioning problem of the cylindrical roller bearing, and further improves the applicability of the bearing in the technology in each application range; the arrangement of the oil supplementing piece in the technology ensures that the grease on the surface of the roller can be supplemented by the oil supplementing piece under the condition that the retainer ring is installed, the phenomenon of dry rotation of the roller is avoided, and the oil supplementing piece can directly supplement the oil on the surface of the roller when the roller runs; the arrangement of the filling blocks in the technology enables the filling blocks to share part of the load when the bearing outer ring bears high load, and the retainer ring can also share part of the load, so that the bearing capacity of the bearing outer ring is further improved.
The invention further provides that: the bearing outer ring is characterized in that a plurality of first openings penetrate through the outer peripheral wall of the retainer ring, second openings are formed in the position, corresponding to each first opening, of the side wall of the bearing outer ring, connecting bolts are arranged on the first openings in a penetrating mode, one ends of the connecting bolts are arranged in a threaded matching mode with the corresponding second openings after penetrating through the first openings, and the connecting bolts are connecting pieces.
The technical scheme is adopted, and the method has the advantages that: when an operator needs to install the check ring, the inner side wall of the check ring is only required to be attached to the side wall of the bearing outer ring, then one end of the connecting bolt is inserted into the first opening, the connecting bolt is rotated to enable one end of the connecting bolt to be in threaded fit with the second opening, and the check ring is fixed on the side wall of the bearing outer ring; the setting of bolted connection mode in the above-mentioned technique makes things convenient for operating personnel dismouting retaining ring, further improvement the production efficiency and the machining efficiency of bearing, still ensure the steadiness of being connected between retaining ring and the bearing inner race simultaneously, further guarantee that the phenomenon that the retaining ring drops can not appear in the operation process of bearing.
The invention further provides that: correspond every second trompil position on the bearing inner race periphery wall and all seted up the third trompil, every the third trompil all sets up with corresponding second trompil intercommunication, every fourth trompil has all been seted up on the connecting bolt, every fixing bolt is all worn to be equipped with on the third trompil, fixing bolt one end sets up with corresponding fourth trompil screw-thread fit after passing the third trompil.
The technical scheme is adopted, and the method has the advantages that: after the retainer ring is fixed on one side of the bearing outer ring through the connecting bolt, an operator inserts one end of the fixing bolt into the third opening, and then rotates the fixing bolt to enable one end of the fixing bolt to be in threaded fit with the fourth opening; the setting of fixing bolt can further reinforcing retaining ring and bearing inner race's joint strength among the above-mentioned technique.
The invention further provides that: the oil storage chamber has been seted up to cavity in the retaining ring, the oil storage intracavity is filled there is solid-state grease, the transition chamber has been seted up to cavity on the piece of mending, be provided with oil outlet and transition chamber and oil storage chamber between transition chamber and the oil storage chamber and pass through the oil outlet intercommunication setting with the oil storage chamber, be provided with the closing member that is used for sealing the oil outlet when the bearing operates in the transition chamber, the oil supply spare is the oil supply hole, the oil supply hole equipartition is in contact surface and oil supply hole and transition chamber intercommunication setting.
The technical scheme is adopted, and the method has the advantages that: when the bearing operates, the temperature in the bearing gradually rises, the solid grease in the oil storage cavity is converted into liquid grease, the oil outlet hole is sealed by the sealing piece, so that the liquid grease cannot flow to the transition cavity, when the bearing operates, the oil outlet hole is not sealed by the sealing piece, the liquid grease in the oil storage cavity enters the transition cavity through the oil outlet hole, when the bearing operates again, the residual liquid grease in the transition cavity flows to the surface of the roller through the oil supplementing hole, and the contact surface is arranged to uniformly coat the grease on the surface of the roller, so that the uniform distribution of the grease on the surface of the roller is ensured; the arrangement of the technology ensures that the roller can not run dry due to the depletion of the surface grease during the running process, further bearing failure caused by the damage of the roller is avoided, and the arrangement of the closing piece ensures that the grease in the oil storage cavity can not flow into the transition cavity at once, further ensuring that the grease stored in the oil storage cavity can be consumed for many times.
The invention further provides that: the closing member includes closing plate and connecting plate, connecting plate one end and transition intracavity wall connection, the other end is connected with the closing plate, the closing plate is close to oil outlet position setting, the closing plate is made by deformation memory alloy material, the closing plate possesses first form under first temperature range, the closing plate possesses the second form under second temperature range, the closing plate supports under first form and detains on the transition intracavity lateral wall and covers the oil outlet, the closing plate is buckled and is exposed the oil outlet under the second form.
The technical scheme is adopted, and the method has the advantages that: the sealing plate is made of shape memory alloy material, particularly nickel-titanium memory alloy, the phase-variable temperature range is 30-45 degrees, the phase-variable temperature range is a first temperature range, the temperature range below the phase-variable temperature range is a second temperature range, when the bearing operates, the internal temperature of the bearing can reach more than 30 degrees, when the internal temperature of the bearing reaches more than 30 degrees, the sealing plate starts to deform when reaching the phase-variable temperature range, the sealing plate bends and is buckled on the inner side wall of the transition cavity, namely is buckled near the opening of the oil outlet and seals the oil outlet, the grease in the oil storage cavity cannot flow into the transition cavity through the oil outlet, when the bearing stops operating, the internal temperature of the sealing plate can gradually reduce to less than 30 degrees, so that the sealing plate starts to deform when reaching the second temperature range, the sealing plate bends and exposes the oil hole, and the liquid grease in the oil storage cavity can flow into the transition cavity through the oil outlet, because the density of the lubricating grease is higher, if the grease in the transition cavity is filled, the grease in the oil storage cavity cannot flow to the transition cavity; the arrangement of the technology ensures that the grease in the oil storage cavity cannot flow into the transition cavity at a time, and further ensures that the grease stored in the oil storage cavity can be consumed for many times; the materials of the shape memory alloy in the above technology belong to the prior art, and therefore, the composition and the structure thereof are not described in detail.
The invention further provides that: and grease storage cotton for enabling grease in the transition cavity to be uniformly coated on the surface of the roller is arranged in the oil supplementing hole.
The technical scheme is adopted, and the method has the advantages that: the grease storage cotton enables grease flowing in the grease filling hole to be uniformly coated on the surface of the roller, and waste of the grease is avoided.
Drawings
FIG. 1 is a sectional view showing the operation state of the present invention;
FIG. 2 is a cross-sectional view of the invention in an inoperative condition.
Detailed Description
The invention provides a cylindrical roller 21 bearing with a detachable retainer ring 3, which comprises a bearing outer ring 1, a bearing inner ring 2 and the retainer ring 3, wherein a plurality of rollers 21 are arranged between the bearing outer ring 1 and the bearing inner ring 2 in a rolling manner, the retainer ring 3 is attached to the side wall of the bearing outer ring 1, the retainer ring 3 and the bearing outer ring 1 are detachably connected through a connecting piece, a filling groove 11 is formed in the bearing outer ring 1 from the side wall to the inner peripheral wall direction of the bearing outer ring, a filling block 31 used for being inserted into the filling groove 11 extends towards the filling groove 11 direction of the retainer ring 3, a contact surface 32 used for being contacted with the rollers 21 is arranged on the inner peripheral wall of the filling block 31, the contact surface 32 and the inner peripheral wall of the bearing outer ring 1 are arranged on the same horizontal plane, an oil supplementing piece used for supplementing the surface of the rollers 21 is arranged on the filling block 31, a plurality of first open holes, the bearing outer ring 1 is characterized in that a second opening 12 is formed in the side wall of the bearing outer ring 1 corresponding to each first opening 33, a connecting bolt 331 penetrates through each first opening 33, one end of each connecting bolt 331 is arranged in a threaded fit with the corresponding second opening 12 after penetrating through the first opening 33, each connecting bolt 331 is a connecting piece, a third opening 13 is formed in the outer peripheral wall of the bearing outer ring 1 corresponding to each second opening 12, each third opening 13 is communicated with the corresponding second opening 12, each connecting bolt 331 is provided with a fourth opening 332, each third opening 13 is provided with a fixing bolt 131, one end of each fixing bolt 131 penetrates through the third opening 13 and is arranged in a threaded fit with the corresponding fourth opening 332, an oil storage cavity 4 is formed in the retainer ring 3 in a hollow mode, and solid grease is filled in the oil storage cavity 4, the hollow transition chamber 41 of having seted up on filling block 31, be provided with oil outlet 42 and transition chamber 41 and oil storage chamber 4 between transition chamber 41 and the oil storage chamber 4 and pass through oil outlet 42 intercommunication setting, be provided with the closure piece that is used for sealing oil outlet 42 when the bearing operates in transition chamber 41, the oil supplementation piece is oil supplementation hole 43, oil supplementation hole 43 equipartition is at contact surface 32 surface and oil supplementation hole 43 and transition chamber 41 intercommunication setting, the closure piece includes closing plate 5 and connecting plate 51, connecting plate 51 one end and transition chamber 41 interior wall connection, the other end is connected with closing plate 5, closing plate 5 is close to oil outlet 42 position setting, closing plate 5 is made by deformation memory alloy material, closing plate 5 possesses first form under first temperature range, closing plate 5 possesses the second form under the second temperature range, closing plate 5 supports under first form and detains on transition chamber 41 inside wall and covers oil outlet 42, the closing plate 5 is bent in the second state and exposes the oil hole 42, and the grease storage cotton used for enabling grease in the transition cavity 41 to be uniformly coated on the surface of the roller 21 is arranged in the oil supplementing hole 43.
When an operator needs to install the retainer ring 3, only the inner side wall of the retainer ring 3 needs to be attached to the side wall of the bearing outer ring 1, then one end of the connecting bolt 331 is inserted into the first opening 33, and the connecting bolt 331 is rotated to enable one end of the connecting bolt 331 to be in threaded fit with the second opening 12, at this time, the retainer ring 3 is fixed on the side wall of the bearing outer ring 1, after the retainer ring 3 is fixed on one side of the bearing outer ring 1 through the connecting bolt 331, the operator inserts one end of the fixing bolt 131 into the third opening 13, and then the fixing bolt 131 is rotated to enable one end of the fixing bolt 131 to be in threaded fit with the; when the bearing operates, the internal temperature of the bearing can reach more than 30 degrees, when the internal temperature of the bearing reaches more than 30 degrees, the closing plate 5 reaches the phase-change temperature range and starts to deform, at the moment, the closing plate 5 bends and is abutted against the inner side wall of the transition cavity 41, namely, is abutted against the position close to the opening of the oil outlet 42 and covers the oil outlet 42, at the moment, grease in the oil storage cavity 4 cannot flow into the transition cavity 41 through the oil outlet 42, when the bearing stops operating, the internal temperature of the bearing can be gradually reduced to be less than 30 degrees, so that the closing plate 5 reaches the second temperature range and starts to deform, at the moment, the closing plate 5 bends and exposes the oil outlet 42, and at the moment, liquid grease in the oil storage cavity 4 can flow into the transition cavity 41.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a cylindrical roller bearing with can dismantle retaining ring which characterized in that: including bearing inner race, bearing inner race and retaining ring, it is provided with a plurality of rollers to roll between bearing inner race and the bearing inner race, the retaining ring subsides are established on the bearing inner race lateral wall, the retaining ring passes through the connecting piece with the bearing inner race and can dismantle the connection setting, bearing inner race has been seted up from its lateral wall to internal perisporium direction and has been filled the groove, the retaining ring extends towards filling the groove direction and has the filling piece that is used for inserting the filling groove, offer the contact surface that is used for contacting with the roller on the inner wall of filling piece, the contact surface is in same horizontal plane setting with bearing inner race internal perisporium, it is provided with the benefit oil spare that is used for mending the oil to the.
2. Cylindrical roller bearing with removable retaining ring, according to claim 1, characterized in that: the bearing outer ring is characterized in that a plurality of first openings penetrate through the outer peripheral wall of the retainer ring, second openings are formed in the position, corresponding to each first opening, of the side wall of the bearing outer ring, connecting bolts are arranged on the first openings in a penetrating mode, one ends of the connecting bolts are arranged in a threaded matching mode with the corresponding second openings after penetrating through the first openings, and the connecting bolts are connecting pieces.
3. Cylindrical roller bearing with removable retaining ring according to claim 2, characterized in that: correspond every second trompil position on the bearing inner race periphery wall and all seted up the third trompil, every the third trompil all sets up with corresponding second trompil intercommunication, every fourth trompil has all been seted up on the connecting bolt, every fixing bolt is all worn to be equipped with on the third trompil, fixing bolt one end sets up with corresponding fourth trompil screw-thread fit after passing the third trompil.
4. Cylindrical roller bearing with removable retaining ring, according to claim 1, characterized in that: the oil storage chamber has been seted up to cavity in the retaining ring, the oil storage intracavity is filled there is solid-state grease, the transition chamber has been seted up to cavity on the piece of mending, be provided with oil outlet and transition chamber and oil storage chamber between transition chamber and the oil storage chamber and pass through the oil outlet intercommunication setting with the oil storage chamber, be provided with the closing member that is used for sealing the oil outlet when the bearing operates in the transition chamber, the oil supply spare is the oil supply hole, the oil supply hole equipartition is in contact surface and oil supply hole and transition chamber intercommunication setting.
5. Cylindrical roller bearing with removable retaining ring, in accordance with claim 4, characterized in that: the closing member includes closing plate and connecting plate, connecting plate one end and transition intracavity wall connection, the other end is connected with the closing plate, the closing plate is close to oil outlet position setting, the closing plate is made by deformation memory alloy material, the closing plate possesses first form under first temperature range, the closing plate possesses the second form under second temperature range, the closing plate supports under first form and detains on the transition intracavity lateral wall and covers the oil outlet, the closing plate is buckled and is exposed the oil outlet under the second form.
6. Cylindrical roller bearing with removable retaining ring, in accordance with claim 4, characterized in that: and grease storage cotton for enabling grease in the transition cavity to be uniformly coated on the surface of the roller is arranged in the oil supplementing hole.
CN202110295704.6A 2021-03-19 2021-03-19 Cylindrical roller bearing with detachable retainer ring Active CN113090649B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110295704.6A CN113090649B (en) 2021-03-19 2021-03-19 Cylindrical roller bearing with detachable retainer ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110295704.6A CN113090649B (en) 2021-03-19 2021-03-19 Cylindrical roller bearing with detachable retainer ring

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CN113090649A true CN113090649A (en) 2021-07-09
CN113090649B CN113090649B (en) 2022-05-17

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060165328A1 (en) * 2002-09-13 2006-07-27 Hiroshi Ueno Bearing device
CN209818534U (en) * 2019-01-23 2019-12-20 人本集团有限公司 Cylindrical roller bearing with helical spring outer ring
CN210344052U (en) * 2019-06-14 2020-04-17 浙江辛子精工机械股份有限公司 Novel oil-supplementing retainer
CN210949563U (en) * 2019-09-19 2020-07-07 人本集团有限公司 Portable oil-supplementing combined bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060165328A1 (en) * 2002-09-13 2006-07-27 Hiroshi Ueno Bearing device
CN209818534U (en) * 2019-01-23 2019-12-20 人本集团有限公司 Cylindrical roller bearing with helical spring outer ring
CN210344052U (en) * 2019-06-14 2020-04-17 浙江辛子精工机械股份有限公司 Novel oil-supplementing retainer
CN210949563U (en) * 2019-09-19 2020-07-07 人本集团有限公司 Portable oil-supplementing combined bearing

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