WO2005012741A1 - シェル型ニードル軸受 - Google Patents
シェル型ニードル軸受 Download PDFInfo
- Publication number
- WO2005012741A1 WO2005012741A1 PCT/JP2004/010825 JP2004010825W WO2005012741A1 WO 2005012741 A1 WO2005012741 A1 WO 2005012741A1 JP 2004010825 W JP2004010825 W JP 2004010825W WO 2005012741 A1 WO2005012741 A1 WO 2005012741A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shell
- needle
- inward
- needles
- inward flanges
- Prior art date
Links
Classifications
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings 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
- F16C19/44—Needle bearings
- F16C19/46—Needle bearings with one row or needles
-
- 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
- F16C33/588—Races of sheet metal
-
- 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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/70—Diameters; Radii
- F16C2240/80—Pitch circle diameters [PCD]
- F16C2240/82—Degree of filling, i.e. sum of diameters of rolling elements in relation to PCD
- F16C2240/84—Degree of filling, i.e. sum of diameters of rolling elements in relation to PCD with full complement of balls or rollers, i.e. sum of clearances less than diameter of one rolling element
Definitions
- the present invention provides a large radial load, such as a portion for supporting the base end of a suspension arm for a rear wheel of a motorcycle so as to be capable of swinging displacement with respect to a frame, and in a state where the rotation angle is limited.
- the present invention relates to an improvement of a used shell type needle bearing.
- a shell-type needle bearing is incorporated between a base end of a motorcycle rear-wheel suspension arm and a frame, and the suspension arm is swingably displaceably supported with respect to the frame.
- shell-type needle bearings that can be incorporated in such a part are known, for example, those described in Patent Documents 1 to 18 and Non-Patent Document 1.
- the shell-type needle bearings described in Patent Documents 18 to 18 each hold a plurality of needles by a retainer so that the needles can roll (rotate) freely.
- Shell type needle bearings with a built-in cage can smoothly rotate each needle, allowing for relatively high-speed rotation.However, the number of needles that can be mounted is reduced, and the load capacity is reduced. .
- a shell-type needle bearing that incorporates the suspension arm into a portion that swingably displaces the frame is not required to rotate at high speed, but is required to have a large load capacity.
- a shell type needle-type bearing of a total needle type in which the cage is omitted and only the needle is installed on the inner diameter side of the shell is used.
- FIG. 4 shows such a full-needle type shell-type needle bearing described in Non-Patent Document 1 described above.
- a plurality of needles 2 are held on the inner diameter side of a cylindrical shell 1 by a retainer, in other words, the rolling surfaces of the needles 2 adjacent in the circumferential direction are directly connected to each other. They are arranged in a state of being opposed to or in contact with each other.
- the shell 1 is made of a metal plate made of a hard metal such as case hardened steel, bearing steel, carbonitrided steel, etc., and is subjected to plastic working such as drawing.
- the cylindrical portion 3 and the axial direction of the cylindrical portion 3 are formed. Bend both ends radially inward And a pair of inward flanges 4 made of the same.
- a retainer in other words, the rolling surfaces of the needles 2 adjacent in the circumferential direction are directly connected to each other. They are arranged in a state of being opposed to or in contact with each other.
- the shell 1 is made of a metal plate made of a hard metal such as case hardened steel, bearing steel, carbonitrided steel, etc.
- each of these inward flanges 4 is bent inward in the axial direction, and a locking recess 5 is formed on the inner surface of each of these inward flanges 4 over the entire circumference. It is formed in a continuous state. Then, locking projections 6 protruding from the center portions of both ends in the axial direction of the needles 2 are inserted into the locking recesses 5 to prevent the needles 2 from being separated from the shell 1. I'm trying.
- the housing in which the shell 1 is provided on the frame side is provided. It is fixed inside the part. Further, a swing center shaft fixed to the base end of the suspension arm is inserted into the inner diameter side of each needle 2. As a result, the suspension arm is supported by the housing portion so as to be swingable and displaceable about the swing center axis.
- the swing center axis swings while rotating the needles 2 in both directions.
- the swing angle at this time is a small value of 1 to several degrees or less.
- the inward flanges 4a formed at both axial ends of the shell la are formed in a simple flat plate shape, and these inward flanges 4a are prevented from occurring. With the inner surface of It is conceivable to increase the contact area between each needle 2a and both end faces in the axial direction.
- the structure shown in FIG. 6 is like a total needle type except for the structural force retainers shown in Patent Documents 2-8.
- each of the inward flanges 4a is formed completely in a direction perpendicular to the central axis, and the inner surface of each of the inward flanges 4a is formed. It is difficult to make the two end faces of each needle 2a completely parallel to each other in the axial direction. Then, due to an unavoidable manufacturing error, one of the inward flanges 4a is deformed as shown in an exaggerated manner in FIG. 7, and the distal end (radial inner end) of the inward flange 4a and each of the needles 2a described above are deformed. The end face in the axial direction may come into contact.
- a pair of folded portions 7 are provided at both axial ends of the shell lb, and the metal plate constituting the shell lb is folded 180 degrees. It is also conceivable that the two folded portions 7 are used to position the plurality of needles 2a arranged on the inner diameter side of the shell lb in the axial direction.
- the structure shown in FIG. 6 is like a total needle type except for the structural force retainer shown in Patent Document 1. However, in the case of such a structure shown in FIG. 8, the axial dimensions of the two folded portions 7 are large. As a result, when the axial length of the shell lb is the same, the axial length of each of the needles 2a must be reduced, and the load capacity of the shell-type needle bearing decreases accordingly.
- Patent Document 1 JP-A-6-264930
- Patent Document 2 Japanese Patent Application Laid-Open No. 7-71450
- Patent Document 3 JP-A-8-326744
- Patent Document 4 JP-A-11-190352
- Patent Document 5 JP-A-2000-291669
- Patent Document 6 JP 2001-65575 A
- Patent Document 7 JP 2001-173666 A
- Patent Document 8 JP-T-2003-502603
- Non-patent document 1 Catalog "Rolling bearing”, Nippon Seie Co., Ltd., 1995, disclosure of inventions B242, B254
- the present invention has been made in view of the circumstances described above, and while ensuring the load capacity, regardless of the thrust load applied to the inward flange portion via each needle, excessive inward wear or cracking of the inward flange portion. It was invented to realize a shell type needle bearing which can prevent the occurrence of damage such as the above.
- the shell-type needle bearing of the present invention includes a shell and a plurality of needles, similarly to the above-mentioned conventionally known shell-type needle bearing.
- the shell has a pair of inward flanges formed by bending both axial ends of the cylindrical portion radially inward.
- each of the needles is provided on the inner diameter side portion of the cylindrical portion between the inner surfaces of the two inward flange portions, and is provided with a rolling surface of a circumferentially adjacent needle that is not held by a retainer. It is provided so as to be able to roll freely in a state where the members are in direct opposition or contact.
- the inner surfaces of the two inward flanges are inclined surfaces that are inclined in such a direction that the distance between them becomes smaller as the radially outwardly directed force is reduced.
- a portion of the both end surfaces in the axial direction of each of the needles closer to the center than the chamfered portion of the outer peripheral portion is formed so as not to protrude outward in the axial direction from the inner peripheral edge of the chamfered portion.
- the space between the pair of inward flanges is sufficiently ensured so that the inward flanges are installed between the inward flanges. each The axial length of the needle can be secured, and the load capacity can be secured.
- the abutting portions between the inner side surfaces of the two inward flange portions and the axial end surfaces of the respective needles may cause remarkable wear which may hinder the rolling and revolving motion of the respective needles. Can be prevented.
- the point of force of the thrust load is the radially outward portion of the inward flange, ie, the inward direction. It is added to the vicinity of the continuous portion between the flange portion and the cylindrical portion. As a result, the distance (span) between the power point of the above-mentioned thrust load and the continuous portion which is also the point of action is shortened, and the moment load (bending stress and tensile stress) applied to this continuous portion is reduced. It is possible to prevent the occurrence of damage such as cracks.
- FIG. 1 is a partial cross-sectional view showing Embodiment 1 of the present invention.
- FIG. 2 is an enlarged sectional view showing a shell taken out.
- FIG. 3 is an enlarged sectional view of a left end portion of FIG. 2.
- FIG. 4 is a cross-sectional view showing one example of a conventional structure.
- FIG. 5 is a partial cross-sectional view corresponding to the right end of FIG. 4 for explaining the inconvenience that occurs in this conventional structure.
- FIG. 6 is a partial cross-sectional view showing a first example of a structure previously considered to solve the above-described disadvantage.
- FIG. 7 is a partial cross-sectional view corresponding to the right end of FIG. 6 for explaining the inconvenience that occurs in the case of the first example.
- FIG. 8 is a partial cross-sectional view showing a second example of the structure considered earlier in order to solve the above-mentioned disadvantages.
- the angle of the inner surface of each of the inward flanges with respect to an imaginary plane existing in a direction orthogonal to the central axis of the shell is set to 3 to 20 degrees.
- the portions closer to the center than the chamfered portions at both axial end surfaces of each needle are flat surfaces.
- the contact portions between the axial end surfaces of the needles and the inner surfaces of the inward flanges are stably provided on the radially outward portions of the inward flanges.
- the distance between the inner peripheral edge of the two inward flanges and the inner peripheral surface of the cylindrical portion in the radial direction of the shell is 1/3 of this diameter smaller than the diameter of the cross section of each needle.
- the rolling surface of each of the needles protrudes radially inward from the inner peripheral edge of each of the inward flanges, and the distance of each of these needles is reduced. It is necessary to bring the rolling surface into contact with the outer peripheral surface of the shaft member, such as the pivot center axis, which passes through the inside of each needle.
- the distance is necessary to make the distance larger than 1/3 of the diameter in order to stably form the both inward flanges. If the distance is 1/3 or less of the diameter, it is difficult to form these inward flanges, and the inclination angle of the inner surface of each of these inward flanges is restricted to the desired range (3 to 20 degrees). Shini ⁇ In addition, the above-mentioned distance is set such that the working of the inward flanges is performed while the inclination angle is stabilized. If possible, a shorter one is preferred.
- each of the needles is attached to the inner peripheral surface of the shell with grease.
- each of the needles does not accidentally fall off from the inner peripheral surface of the shell, so that the assembling work is not required. It can be made easier.
- FIG. 13 shows an embodiment of the present invention.
- the shell type needle bearing includes a shell lc and a plurality of needles 2a.
- the shell lc is formed by bending both ends in the axial direction of the cylindrical portion 3 radially inward to form a pair of inward flange portions 4b and 4c.
- each of the needles 2a is provided between the inner surfaces of the inward flanges 4b and 4c on the inner diameter side portion of the cylindrical portion 3 in the circumferential direction without being held by a retainer.
- the rolling surfaces are provided so as to freely roll in a state where the rolling surfaces are directly close to each other or in contact with each other.
- Both end faces in the axial direction of each of the needles 2a include a chamfered portion 8 that forms an outer peripheral edge portion and a flat surface portion 9 that is closer to the center than the chamfered portion 8. Note that it is impossible to form a convex portion at the center of the flat surface portion 9, but it is possible to form a concave portion.
- the inner side surfaces 10a and 10b of the inward flange portions 4b and 4c are inclined surfaces that are inclined in such a direction that the distance between them becomes smaller toward the outside in the radial direction.
- the angle ⁇ between the inner surfaces 10a and 10b with respect to a virtual plane existing in a direction perpendicular to the central axis of the shell lc is set to 320 degrees.
- the thickness of the two inward flanges 4b and 4c is set such that the thickness of the inward flanges 4b and 4c decreases toward the leading edge (inner peripheral edge), and the inner surfaces of the inward flanges 4b and 4c are reduced.
- the angle ⁇ is given to 10a and 10b. Note that the outer surfaces of the inward flange portions 4b and 4c are substantially parallel to the virtual plane.
- the thickness of the inward flanges 4b and 4c is equal to or less than the thickness of the metal plate forming the shell lc. For this reason, the ratio of the inward flanges 4b and 4c to the axial length of the shell lc is kept small, and the distance between the inner surfaces 10a and 10b of the inward flanges 4b and 4c is sufficiently large. Can be secured. Then, the axial length L of each of the needles 2a installed between the inner side surfaces 10a, 10b of these two inward flange portions 4b, 4c is ensured, and the shell-type needle bearing is secured.
- Load capacity can be secured.
- the angle ⁇ ⁇ is restricted to 20 degrees or less, The load capacity can be ensured while securing the thickness of the inward flanges 4b and 4c and securing the strength and rigidity of the inward flanges 4b and 4c.
- the contact state between the inner side surfaces 10a, 10b of the inward flange portions 4b, 4c and the axial end surfaces of the needles 2a is not limited to a state in which the surface pressure is partially increased.
- each of the needles 2a abuts on the inner side surface 10a (or 10b) at a continuous portion of the chamfered portion 8 and the flat surface portion 9 or a portion near the continuous portion. Since the width W of the chamfered portion 8 in the radial direction is small,
- the point of application of the thrust load applied to the inner surface 10a (or 10b) from the inner surface 10a (or 10b) is the radially outward portion of the inner surface 10a (or 10b), that is, the inner surface 10a (or 10b) and the cylindrical portion. 3 is added to the portion near the continuous portion with the inner peripheral surface.
- the distance (span) between the point of application of the thrust load and the continuous portion, which is also the point of action is shortened, and the moment load (bending stress) applied to the continuous portion is reduced. That damage such as cracks will occur Can be prevented.
- the angle ⁇ of the inner surfaces 10a and 10b with respect to the virtual plane ⁇ existing in the direction perpendicular to the central axis of the shell lc is 3 degrees or more. Even if it deviates from the design value, the inner surface of the inner surface 10a of the inward flange 4b (or the inner surface 10b of the inward flange 4c) will not tilt in the opposite direction. Therefore, even if the processing accuracy is not particularly strict, it is possible to effectively prevent the continuous portion from being damaged such as a crack.
- the two inward flanges 4b and 4c are projected radially inward from the inner peripheral edges thereof, and the rolling surface 2a of each of the needles is brought into contact with the outer peripheral surface of the pivot center axis. It can swing freely.
- the distance H is larger than 1/3 of the diameter D.
- the work of forming the inward flanges 4b and 4c is facilitated, and the inclination angles ⁇ of the inner surfaces 10a and 10b of the inward flanges 4b and 4c are set to the desired range (3 to 20 degrees). It is easier to regulate.
- Each of the needles 2a is occupied by grease on the inner peripheral surface of the cylindrical portion 3 of the shell lc. Therefore, even before the shell-type needle bearing is mounted on the swing support portion, each of the needles 2a does not accidentally fall off from the inner peripheral surface of the shell lc, thereby facilitating the mounting operation. Can be achieved.
- the shell-type needle bearing of the present invention is not limited to the portion that supports the base end of the suspension arm for the rear wheel of the motorcycle so as to be swingably displaceable with respect to the frame. It can be used for parts that oscillate at small angles while receiving a thrust load, such as oscillating supports.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/566,956 US20080267552A1 (en) | 2003-07-30 | 2004-07-29 | Shell-Type Needle Roller Bearing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-282436 | 2003-07-30 | ||
JP2003282436A JP4457601B2 (ja) | 2003-07-30 | 2003-07-30 | シェル型ニードル軸受 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005012741A1 true WO2005012741A1 (ja) | 2005-02-10 |
Family
ID=34113777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/010825 WO2005012741A1 (ja) | 2003-07-30 | 2004-07-29 | シェル型ニードル軸受 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080267552A1 (ja) |
JP (1) | JP4457601B2 (ja) |
WO (1) | WO2005012741A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5154199B2 (ja) * | 2007-11-07 | 2013-02-27 | Ntn株式会社 | トリポード型等速自在継手 |
JP5273442B2 (ja) * | 2008-03-07 | 2013-08-28 | 日本精工株式会社 | ラジアル針状ころ軸受 |
WO2014181375A1 (ja) * | 2013-05-08 | 2014-11-13 | 株式会社ハーモニック・ドライブ・システムズ | 波動歯車装置の波動発生器 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5136108Y1 (ja) * | 1975-02-03 | 1976-09-04 | ||
JPH0439412A (ja) * | 1990-06-06 | 1992-02-10 | Nippon Seiko Kk | ころ軸受 |
JPH06264930A (ja) * | 1993-03-12 | 1994-09-20 | Nippon Seiko Kk | シェル型ニードル軸受用外輪とその製造方法 |
JPH07238940A (ja) * | 1994-02-28 | 1995-09-12 | Ntn Corp | ころ軸受 |
JP2002070874A (ja) * | 2000-08-28 | 2002-03-08 | Nsk Ltd | 回転支持装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501210A (en) * | 1968-05-21 | 1970-03-17 | Schaeffler Ohg Industriewerk | Shell-type roller bearing |
JPS5913369Y2 (ja) * | 1979-07-18 | 1984-04-20 | 日本精工株式会社 | 円筒ころ軸受 |
-
2003
- 2003-07-30 JP JP2003282436A patent/JP4457601B2/ja not_active Expired - Fee Related
-
2004
- 2004-07-29 WO PCT/JP2004/010825 patent/WO2005012741A1/ja active Application Filing
- 2004-07-29 US US10/566,956 patent/US20080267552A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5136108Y1 (ja) * | 1975-02-03 | 1976-09-04 | ||
JPH0439412A (ja) * | 1990-06-06 | 1992-02-10 | Nippon Seiko Kk | ころ軸受 |
JPH06264930A (ja) * | 1993-03-12 | 1994-09-20 | Nippon Seiko Kk | シェル型ニードル軸受用外輪とその製造方法 |
JPH07238940A (ja) * | 1994-02-28 | 1995-09-12 | Ntn Corp | ころ軸受 |
JP2002070874A (ja) * | 2000-08-28 | 2002-03-08 | Nsk Ltd | 回転支持装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4457601B2 (ja) | 2010-04-28 |
JP2005048896A (ja) | 2005-02-24 |
US20080267552A1 (en) | 2008-10-30 |
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