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WO2019144395A1 - Élément de maintien pour roulement à rouleaux coniques et roulement à rouleaux coniques - Google Patents

Élément de maintien pour roulement à rouleaux coniques et roulement à rouleaux coniques Download PDF

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Publication number
WO2019144395A1
WO2019144395A1 PCT/CN2018/074417 CN2018074417W WO2019144395A1 WO 2019144395 A1 WO2019144395 A1 WO 2019144395A1 CN 2018074417 W CN2018074417 W CN 2018074417W WO 2019144395 A1 WO2019144395 A1 WO 2019144395A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
annular ring
lintel
tapered roller
cage
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.)
Ceased
Application number
PCT/CN2018/074417
Other languages
English (en)
Chinese (zh)
Inventor
王海
贾宪林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to PCT/CN2018/074417 priority Critical patent/WO2019144395A1/fr
Publication of WO2019144395A1 publication Critical patent/WO2019144395A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16C19/34—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 for both radial and axial load
    • F16C19/36—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 for both radial and axial load with a single row of rollers
    • 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
    • F16C33/46—Cages for rollers or needles

Definitions

  • the present invention relates to a cage for a tapered roller bearing having a first annular ring, a second annular ring, and a lintel connecting the first annular ring and the second annular ring, wherein the first The diameter of the annular ring is larger than the second annular ring.
  • the invention also relates to a tapered roller bearing having the above-described cone angle cage.
  • the existing cage for the tapered roller bearing is a single cone-shaped bowl-shaped structure, the cage includes a large annular ring, a small annular ring and a lintel connecting the large annular ring and the small annular ring, wherein the cone angle
  • the size is determined by the angle of the inner ring of the bearing and the tapered roller.
  • the cage can be metal or plastic.
  • the metal cage needs to be expanded by means of a mold before assembly so that the small rib of the inner ring of the bearing can smoothly pass through the cage that fills the roller, otherwise it cannot be installed.
  • assembling first place the cage bowl up on the platform, fill the roller in the window, then lower the inner ring vertically, let the inner ring pass through the envelope circle of the roller, and then shrink the cage by means of the mold. So that the diameter of the circle of the envelope is smaller than the diameter of the small rib of the inner ring, thereby preventing the roller from falling from the inner ring, and finally the inner ring, the rolling body and the cage form an inseparable inner component. Therefore, expansion and contraction are required when assembling the metal cage. On the one hand, the expansion and contraction of the metal cage requires high dimensional accuracy and higher requirements for manufacturing. On the other hand, the metal cage needs to be specially designed to expand and shrink the mold, which increases the production cost.
  • the plastic cage cannot be expanded and contracted.
  • the inner ring causes the plastic cage to elastically deform, resulting in an increase in the diameter of the envelope circle, so that the inner ring smoothly passes through the cage that fills the roller.
  • the problem with this type of assembly is that the plastic cage is deformed during installation and is prone to breakage.
  • the technical problem to be solved by the present invention is to provide a cage for a tapered roller bearing which can avoid "expansion and contraction" when the metal cage is installed, and which is easy to break when the plastic cage is installed. problem.
  • a cage for a tapered roller bearing having a first annular ring, a second annular ring and a lintel connecting the first annular ring and the second annular ring, wherein the first ring
  • the diameter of the ring is larger than the diameter of the second annular ring
  • the contact points of the lintel and the tapered roller respectively form an envelope circle around the tapered roller in a respective radial plane, the diameter of the envelope circle being axially from the first An annular ring to a second annular ring is gradually reduced.
  • the cross beam can be axially divided into a first section close to the first annular ring and close to the second ring by one of the envelope circles.
  • a second section of the loop wherein the envelope circle in the first section and the envelope circle in the second section form a truncated cone having different taper angles, respectively.
  • the lintel according to the prior art is generally linear
  • the lintel according to the invention is a reticle type
  • the envelope circle forming at least two Round tables of different taper angles preferably form two circular tables having different taper angles. Therefore, when assembling, the envelope circle of the lintel according to the present invention can be made larger in diameter than the known straight traverse, thereby avoiding the problem that the cage needs to be expanded and deformed at the time of assembly.
  • the circular table formed by the envelope circle in the first section of the lintel has a larger cone angle than the circular table formed by the envelope circle in the second section, and thus in the second part
  • the diameter of the envelope circle in the segment will be larger than the diameter of the envelope circle of the linear lintel at the same axial position, that is to say the lintel according to the invention compared to the linear lintel according to the prior art.
  • Being “expanded" on the second section so that when the inner ring of the bearing is assembled, the tapered roller first contacts the second section of the lintel due to the thrust of the inner ring, so that the inner ring can pass smoothly Extending the second section without expanding or deforming the second section.
  • the cone angle of the circular table formed by the envelope circle in the first section is 2° larger than the cone angle of the circular table formed by the envelope circle in the second section. Up to 10°, preferably 6° to 8°.
  • the first section and the second section of the polygonal cross-beam form an angle of between 1 and 5, preferably between 3 and 4 .
  • the crossbeam is divided into one of the first section and the second section, the distance of one of the envelope circles from the axial direction to the first annular ring is greater than to the second ring The distance of the circle. That is to say, the axial length of the projection of the first section in the plane in which the central axis lies is greater than the axial length of the projection of the second section in the plane in which the central axis lies. In a particular embodiment, the distance of one of the envelope circles from the axial direction to the second annular ring is three times the thickness of the lintel.
  • the first section and the second section of the web comprise a line-shaped cross-beam and the second section of the web is bent away from the tapered roller fold.
  • the thickness of the first section of the lintel is equal to the thickness of the second section of the lintel.
  • the inner side of the second section of the lintel adjacent to the tapered roller is oriented away from the inner side of the first section of the lintel adjacent the tapered roller
  • the direction of the tapered roller is bent, and the outer side of the second section of the lintel away from the tapered roller is in the same plane as the outer side of the first section of the lintel away from the tapered roller .
  • the thickness of the second section of the lintel of the cage is made smaller than the thickness of the first section of the lintel, by thinning the second section, thereby achieving the diameter of the envelope circle in the second section Become bigger.
  • the cage is made of a metallic material or of plastic. Whether constructed of metal or plastic, the cage according to the invention does not present a risk of damage to the cage due to expansion or deformation when assembled.
  • tapered roller bearing comprising an outer ring, an inner ring, a tapered roller and a cage having the above features.
  • Tapered roller bearings can be single row tapered roller bearings, double row tapered roller bearings or four row tapered roller bearings.
  • the roller and the cage When assembling the inner ring of the tapered roller bearing, the roller and the cage, firstly, the annular ring with the smaller diameter of the cage is placed on the platform, and the roller is filled in the window of the cage, and then The inner ring of the bearing is vertically lowered along the axial direction.
  • the falling process of the inner ring is divided into two stages. In the first phase, the inner ring falls until the inner ring contacts the roller or, more precisely, until the small ring of the inner ring contacts the roller.
  • the roller fits the second section of the lintel, and the diameter of the envelope circle of the roller is relatively linear
  • the diameter of the lintel in the same axial position is enlarged, and the inner ring can pass through the roller smoothly.
  • the roller contacts the first section of the lintel and the second The sections are separated, whereby the large retaining ring and the small retaining ring of the inner ring keep the roller in the window from the axial sides of the roller, preventing the roller from falling from the inner ring side, the inner ring, the roller and the retaining structure Inseparable internal components.
  • Figure 1a is a front elevational view of a cage in accordance with a preferred embodiment of the present invention
  • FIG. 1b is a perspective view of a cage in accordance with a preferred embodiment of the present invention.
  • Figure 2a is half of a cross-sectional view of the cage according to Figure 1,
  • Figure 2b is a partial cross-sectional view of the cage according to Figure 2a
  • Figure 2c is a partial cross-sectional view of a retainer in accordance with another preferred embodiment of the present invention.
  • Figure 3 is a schematic view of assembly according to the prior art.
  • Figure 4 is a schematic illustration of the second stage of assembly in accordance with the present invention.
  • FIG. 1a and 1b show a cage 1 for a tapered roller bearing according to a preferred embodiment of the invention, wherein Fig. 1a is a front view of the cage 1 and Fig. 1b is a perspective view of the cage 1.
  • the cage 1 is for receiving and holding a tapered roller of a tapered roller bearing and is made of metal or plastic.
  • the cage 1 has a large annular ring 2, a small annular ring 3 and a lintel 4 connecting the large annular ring 2 and the small annular ring 3, wherein the diameter of the large annular ring 2 is larger than the diameter of the small annular ring 3. And a plurality of lintels 4 are evenly distributed between the large annular ring 2 and the small annular ring 3.
  • the large annular ring 2, the small annular ring 3 and the adjacent lintel 4 constitute a window for receiving the tapered roller.
  • the contact points of the lintel and the tapered roller in the same radial plane constitute an enveloping circle around the tapered roller.
  • the traverse of the tapered roller cage is generally in the shape of a straight rod, that is, an envelope circle. It will form a round table with a cone angle.
  • the tapered roller is first placed in the window.
  • the lintel of the cage will completely conform to the tapered roller, so when the inner ring of the bearing is loaded, the small annular ring 3 is made.
  • the envelope circle of the attachment is enlarged, leaving the cage at risk of being damaged.
  • the cage 1 Different from the conventional linear lintel, the cage 1 according to the embodiment adopts a new structure of a double circular table shape, that is, the traverse beam is non-linear, and the envelope circle of the lintel will form two circular tables with different cone angles.
  • the lintel 4 of the cage 1 is divided into an upper section 4a close to the large annular ring side and a lower section 4b close to the small annular ring side, the envelope circle of the upper section 4a and the envelope circle of the lower section 4b respectively Forming two circular tables having different taper angles, preferably, the cone angle of the round table formed by the envelope circle of the upper section 4a is larger than the cone angle formed by the envelope circle of the lower section 4b, that is, the inner surface of the upper section 4a and the cage 1
  • the angle formed by the central axis is larger than the angle formed by the inner surface of the upper section 4b and the central axis of the cage 1, whereby the lintel 4 forms a polygonal traverse.
  • FIG. 2a is a half of a cross-sectional view of the cage 1
  • Figure 2b is a partial enlarged view of the lintel 4 of the cage 1 in the circle of Figure 2.
  • Partial section view As shown in Fig. 2b, the junction of the upper section 4 and the lower section 4b is axially spaced from the small annular ring 3 by an axial distance of three times the thickness of the web 4.
  • the intersecting straight lines consisting essentially of the upper section 4a and the lower section 4b form an angle ⁇ , which is preferably between 2° and 8°, particularly advantageously between 3° and 4°.
  • Figure 2c shows a further preferred embodiment according to the invention, in which only the inner surface of the upper section 4a and the inner surface of the lower section 4b form two intersecting straight lines, and the angle at which the two straight lines intersect is preferably 2° Up to 8°, however, the outer surface of the upper section 4a and the outer surface of the lower section 4b remain unchanged. That is, the thickness of the upper section 4a is greater than the thickness of the lower section 4b.
  • FIG. 3 and 4 show schematic views of the inner ring 5, the roller 6 and the cage 1 on which the bearing is assembled.
  • the small annular ring 3 of the cage 1 is first placed flat on the platform, and the tapered roller 6 is filled in the window, and then the inner ring 5 of the bearing is vertically lowered in the direction of the arrow in the figure.
  • the falling process of the inner ring 5 is divided into two stages. As shown in Fig. 3, in the first stage, the inner ring 5 falls until the inner ring 5 contacts the roller 6, or more precisely, the small retaining ring 5b of the inner ring 5 contacts the roller 6. Thereby, the second stage is entered. As shown in Fig.

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

Abstract

L'invention concerne un élément de maintien (1) pour un roulement à rouleaux coniques, lequel élément a une première bague annulaire (2), une seconde bague annulaire (3) et une traverse (4) reliant la première bague annulaire (2) à la seconde bague annulaire (3), le diamètre de la première bague annulaire (2) étant supérieur au diamètre de la seconde bague annulaire (3), les points de contact de la traverse (4) et des rouleaux coniques du roulement à rouleaux coniques formant dans leur plan radial respectif des cercles enveloppants autour du rouleau conique, le diamètre des cercles enveloppants diminuant progressivement le long de la direction axiale à partir de la première bague annulaire (2) jusqu'à la seconde bague annulaire (3) ; la traverse (4), délimitée par l'un des cercles enveloppants, peut être divisée en un premier segment (4a) proche de la première bague annulaire (2) et un second segment (4b) proche de la seconde bague annulaire (3), l'angle d'effilement du tronc de cône circulaire formé par le cercle enveloppant dans le premier segment (4a) étant différent de l'angle d'effilement du tronc de cône circulaire formé par le cercle enveloppant dans le second segment (4b).
PCT/CN2018/074417 2018-01-29 2018-01-29 Élément de maintien pour roulement à rouleaux coniques et roulement à rouleaux coniques Ceased WO2019144395A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/074417 WO2019144395A1 (fr) 2018-01-29 2018-01-29 Élément de maintien pour roulement à rouleaux coniques et roulement à rouleaux coniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/074417 WO2019144395A1 (fr) 2018-01-29 2018-01-29 Élément de maintien pour roulement à rouleaux coniques et roulement à rouleaux coniques

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WO2019144395A1 true WO2019144395A1 (fr) 2019-08-01

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003139133A (ja) * 2001-11-01 2003-05-14 Nsk Ltd 円錐ころ軸受
JP2006046465A (ja) * 2004-08-03 2006-02-16 Nsk Ltd 円錐ころ軸受
JP2006226308A (ja) * 2005-02-15 2006-08-31 Jtekt Corp 円錐ころ軸受用保持器
JP2007057038A (ja) * 2005-08-25 2007-03-08 Ntn Corp 円すいころ軸受
CN102089541A (zh) * 2008-07-08 2011-06-08 日本精工株式会社 圆锥滚子轴承用树脂制保持器和圆锥滚子轴承
CN102817919A (zh) * 2011-12-13 2012-12-12 洛阳轴研科技股份有限公司 一种圆锥滚子轴承及该轴承用保持架

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003139133A (ja) * 2001-11-01 2003-05-14 Nsk Ltd 円錐ころ軸受
JP2006046465A (ja) * 2004-08-03 2006-02-16 Nsk Ltd 円錐ころ軸受
JP2006226308A (ja) * 2005-02-15 2006-08-31 Jtekt Corp 円錐ころ軸受用保持器
JP2007057038A (ja) * 2005-08-25 2007-03-08 Ntn Corp 円すいころ軸受
CN102089541A (zh) * 2008-07-08 2011-06-08 日本精工株式会社 圆锥滚子轴承用树脂制保持器和圆锥滚子轴承
CN102817919A (zh) * 2011-12-13 2012-12-12 洛阳轴研科技股份有限公司 一种圆锥滚子轴承及该轴承用保持架

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