WO2011001844A1 - アンギュラ玉軸受用樹脂保持器 - Google Patents
アンギュラ玉軸受用樹脂保持器 Download PDFInfo
- Publication number
- WO2011001844A1 WO2011001844A1 PCT/JP2010/060475 JP2010060475W WO2011001844A1 WO 2011001844 A1 WO2011001844 A1 WO 2011001844A1 JP 2010060475 W JP2010060475 W JP 2010060475W WO 2011001844 A1 WO2011001844 A1 WO 2011001844A1
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- diameter side
- side portion
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- cage
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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
- F16C33/38—Ball cages
- F16C33/41—Ball cages comb-shaped
- F16C33/418—Details of individual pockets, e.g. shape or ball retaining means
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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
- F16C33/38—Ball cages
- F16C33/41—Ball cages comb-shaped
- F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
- F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
- F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
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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
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/44—Hole or pocket sizes
-
- 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]
Definitions
- This invention relates to a resin cage for angular ball bearings.
- angular ball bearings In angular ball bearings, it is desired to increase the load capacity without increasing the size, particularly in automotive applications.
- a crown-shaped cage made of resin is used to hold the ball between the inner and outer rings.
- the ball mounted on the cage It is effective to increase the number.
- what is generally used as a resin crown type cage for an angular ball bearing has a shape in which a ring portion and a plurality of column portions each protruding in the axial direction from the ring portion are formed in the circumferential direction. Those adjacent to each other in the circumferential direction of the pillar portion form a pocket that accommodates a ball that forms a rolling element.
- the inner surface of the pocket is formed in a spherical shape so that the rotation of the ball is not hindered, but the bearing inner diameter side of the column portion is provided on each column portion so that the ball attached to the cage does not fall off during the bearing assembly.
- Patent Document 2 disclose crown-shaped cages in which the parting lines of the above-described divided molds are set so as to pass through the pitch circle positions of the ball rows held by the cage.
- JP 2008-115981 A Japanese Patent Laid-Open No. 10-103359
- One of the objects of the present invention is to provide a resin cage for an angular ball bearing that can increase the number of balls that can be held even with the same ball pitch circle diameter and that can sufficiently secure the mechanical strength of the pillar portion. It is to provide.
- the present invention relates to a resin crown type cage that holds a plurality of balls forming a rolling element of an angular ball bearing so that they can roll at a specified interval between inner and outer rings, in order to solve the above-mentioned problem,
- a ring portion and a plurality of pillar portions that form pockets that accommodate balls that form rolling elements are formed in a plurality in the circumferential direction so as to protrude from the ring portion in the axial direction,
- Each column portion is connected to the column portion inner diameter side portion constituting the bearing inner diameter side of the column portion and the column portion inner diameter side portion so as to extend to both sides in the circumferential direction at a radially outer end position.
- the inner surface of the pocket is formed in a spherical shape extending between the columnar inner diameter side portion and the columnar outer diameter side portion, and the connecting position of the column outer diameter side portion with respect to the columnar inner diameter side portion
- the thickness at the connection position of the inner diameter side portion of the column portion is made larger than the thickness at the pitch circle position by being adjusted radially outward from the pitch circle of the plurality of balls held in each pocket.
- a resin holder can be provided.
- FIG. 2 is a half sectional view showing a configuration example of a bearing using the cage of FIG. 1.
- FIG. 3 is a half sectional view showing an example of an angular ball bearing when the cage of FIG. 1 is viewed from the K direction.
- the arrow view which shows an example of the angular ball bearing which looked at the holder
- FIG. 2 is a half sectional view showing an example of an angular ball bearing when the cage of FIG. 1 is viewed from the J direction.
- the arrow view which shows an example of the angular ball bearing which looked at the holder
- retainer of FIG. Explanatory drawing which shows the metal mold
- FIG. 1 shows a resin cage (hereinafter also simply referred to as a cage) 1 for an angular ball bearing according to an embodiment of the present invention.
- the cage 1 includes a ring portion 2 and a plurality of pockets 5 that are formed in the circumferential direction so as to protrude from the ring portion 2 in the axial direction, and that accommodate balls 4 that are adjacent to each other in the circumferential direction to form rolling elements.
- the pillar part 3 which forms is provided.
- Each column portion 3 has a column portion inner diameter side portion 3A constituting the bearing inner diameter side of the column portion 3 and a shape extending to both sides in the circumferential direction at a radially outer end position with respect to the column portion inner diameter side portion 3A. It consists of the column part outer diameter side part 3B to connect.
- the column portion outer diameter side portion 3B is gradually reduced in width and height in such a manner that the tip wide portion 3Ba continues from the tip wide portion 3Ba to the column base end side, and And a rib portion 3Bb that generates a step between the inner diameter side portion 3A of the column portion.
- the wide distal end portion 3Ba has a trapezoidal shape that becomes gradually narrower toward the base end side of the column portion when viewed from the outer diameter side (see FIG. 1: J arrow), and both side pieces have an arc shape.
- the outer diameter surface of the wide tip 3Ba is a cylindrical surface having the same diameter over the entire length in the axial direction.
- the column portion distal end side portion 3Aa of the column portion inner diameter side portion 3A has a tapered cross section that becomes narrower toward the column portion distal end side, and the column portion outer diameter side portion 3B and Connected with steps.
- the inner surface of the pocket 5 is formed in a spherical shape extending over the column portion inner diameter side portion 3A and the column portion outer diameter side portion 3B.
- the connection position of the column portion outer diameter side portion 3 ⁇ / b> B with respect to the column portion inner diameter side portion 3 ⁇ / b> A is adjusted radially outward from the pitch circle position of the plurality of balls 4 held in each pocket 5. Yes.
- FIG. 2 shows an example of an angular ball bearing using the cage 1.
- the cage 1 is incorporated in the outer ring 13 while holding the balls 4, and then the inner rings 12 in both rows are incorporated.
- FIG. 2 shows a single row angular ball bearing, it may be configured as a double row angular ball bearing.
- the resin molding of the cage 1 includes a portion formed by the column portion inner diameter side portion 3 ⁇ / b> A and the ring portion 2 that is located inside the cage 1 in the radial direction in the mold closed state. This is performed by using a mold 20 including a first mold 21 to be molded and a second mold 22 which is positioned outside the retainer 1 in the radial direction and molds the column portion outer diameter side portion 3B. . After the molding, the molds 21 and 22 are opened in opposite directions as indicated by arrows in the axial direction.
- the mold opening of the mold 20 will be described.
- resin is injected into them through a gate (not shown).
- the first mold 21 and the second mold 22 are divided by a mold dividing surface indicated by X in the figure, and the cage is held by the inner peripheral surface 22a of the second mold 22.
- An outer diameter surface of one wide tip portion 3Ba is formed.
- the first mold 21 and the second mold 22 are alternately opened in the axial direction of the cage 1 indicated by the arrows, and the cage 1 is taken out. Therefore, mold opening can be performed smoothly.
- the radially outer peripheral surface of the column portion 3 forms the first end side portion PS1 where the ring portion 2 is positioned in the axial direction by the ring portion 2 and the column portion outer diameter side portion 3B.
- the column portion outer diameter side portion 3B protruding outward in the radial direction from the end side portion PS1 forms the remaining second end side portion PS2 of the outer peripheral surface (see FIG. 2).
- the parting surface PL of the split mold for molding the cage 1 forms a tapered surface having a diameter smaller than the opposite side on the side where the ring portion 2 is located, and the first end side portion PS1 and its part It is set radially outward from the pitch circle position so as to include the extension to the column portion outer diameter side portion 3B side.
- the split angle ⁇ of the parting surface PL with respect to the bearing center axis is set to 0.3 ° or more (for example, 1 °).
- the thickness of the columnar inner diameter side portion 3A of the cage 1 is also minimum at the pitch circle position.
- the value becomes t 0 (see FIG. 3A). Therefore, if the column portion outer diameter side portion 3B is connected radially outside the pitch circle position, the thickness t ′ of the column portion inner diameter side portion 3A at the connection position is larger than the thickness t 0 at the pitch circle position. growing.
- the thickness t 0 of the pillar inner diameter side portion 3A at the pitch circle position is, for example, not less than 0.3 mm and not more than 0.6 mm. Further, the thickness t ′ of the columnar inner diameter side portion 3A at the connection position is 0.6 mm or greater and 1.0 mm or less.
- the circumferential dimension at the connecting portion between the column portion outer diameter side portion 3B and the column portion inner diameter side portion 3A is shown.
- t1 the circumferential dimension at the intersection between the pitch circle position and the portion 3Aa on the tip end side of the column part
- r1 and r2 the radial dimension from the inner diameter surface of the ring part 2 to each part.
- the wide end portion 3Ba is connected to the rib portion 3Bb on the outer diameter side with respect to the pitch circle position.
- the cross-sectional area of the connection portion between the portion 3Ba and the rib portion 3Bb is larger than the cross-sectional area of the intersecting portion between the pitch circle position and the rib portion 3Bb.
- the columnar inner diameter side portion 3A is connected to the columnar outer diameter side portion 3B at its thinnest portion, and the pocket 5 of the cage 1
- the mechanical strength cannot be ensured when the ball 4 is inserted into the bearing 4 or when a load is applied from the ball 4 in the bearing 11 in use.
- it is necessary to ensure that the thickness at the thinnest portion at the connection position is 0.6 mm or more, but if the thickness at the thinnest portion is increased, The number of balls 4 that can be arranged within the same pitch circle diameter is limited, making it difficult to increase the load capacity.
- the columnar inner diameter side portion 3A is connected to the columnar outer diameter side portion 3B at a position thicker than the pitch circle position on the radially outer side than the pitch circle position. Therefore, the connection area between the column portion inner diameter side portion 3A and the column portion outer diameter side portion 3B can be increased, the mechanical strength of the column portion 3 of the crown type cage can be increased, and the pocket of the cage 1 can be increased. It is possible to make it difficult for the column portion 3 to break when the ball 4 is inserted into the ball 5 or when a load is applied from the ball 4 in the bearing 11 in use.
- the thickness t of the columnar inner diameter side portion 3A at the pitch circle position is reduced to 0.6 mm or less, the strength of the columnar portion 3 of the crown type cage can be sufficiently secured. Even so, the number of balls 4 that can be held can be increased, and the load capacity of the bearing can be increased.
- the mold structure of the mold and the mode of mold opening are not limited as long as the holder 1 can be molded such that the position is adjusted radially outward from the pitch circle of the plurality of balls 4 held in each pocket 5. .
- the present invention relates to a resin crown type cage that holds a plurality of balls forming a rolling element of an angular ball bearing so that they can roll at a specified interval between inner and outer rings, in order to solve the above-mentioned problem,
- a ring portion and a plurality of pillar portions that form pockets that accommodate balls that form rolling elements are formed in a plurality in the circumferential direction so as to protrude from the ring portion in the axial direction,
- Each column portion is connected to the column portion inner diameter side portion constituting the bearing inner diameter side of the column portion and the column portion inner diameter side portion so as to extend to both sides in the circumferential direction at a radially outer end position.
- the inner surface of the pocket is formed in a spherical shape extending between the columnar inner diameter side portion and the columnar outer diameter side portion, and the connecting position of the column outer diameter side portion with respect to the columnar inner diameter side portion
- the thickness at the connection position of the inner diameter side portion of the column portion is made larger than the thickness at the pitch circle position by being adjusted radially outward from the pitch circle of the plurality of balls held in each pocket.
- the connecting position of the column portion outer diameter side portion connected to protrude the column portion of the cage to both sides in the circumferential direction with respect to the column portion inner diameter side portion It was comprised so that it might adjust to a radial direction outer side rather than the pitch circle of the some ball hold
- the column portion inner diameter side portion is connected to the column portion outer diameter side portion at a position radially thicker than the pitch circle at a position thicker than the pitch circle position. It is possible to increase the connection area with the outer diameter side of the part, increase the mechanical strength of the pillar part of the crown type cage, and to insert the ball into the cage pocket or when the bearing is in use. It is possible to make it difficult for the column portion to break when a load is applied from the moving body.
- the thickness t at the pitch circle position of the inner diameter side portion of the column portion is reduced to 0.6 mm or less, the strength of the column portion of the crown type cage can be sufficiently secured. Even if it exists, the number of balls that can be held can be increased, and the load capacity of the bearing can be increased.
- the lower limit value of the thickness t necessary for ensuring the mechanical strength of the column portion is, for example, about 0.3 mm.
- the radial outer peripheral surface of the column portion is formed by forming the first end side portion where the ring portion is located in the axial direction by the ring portion and the column portion outer diameter side portion, and projecting outward in the radial direction from the first end side portion.
- the column part outer diameter side portion to be formed can form the remaining second end side portion of the outer peripheral surface.
- the parting surface of the split mold for molding the cage is formed into a tapered surface whose diameter is smaller than the opposite side on the side where the ring portion is located, and the first end side portion and its column portion outer diameter It can be set radially outward from the pitch circle position so as to include extension to the side portion side.
- the parting surface By forming the parting surface as a tapered surface as described above, the resin molded body of the cage can be smoothly punched.
- the split angle of the parting surface with respect to the bearing center axis is set to 0.3 ° or more (the upper limit is, for example, 5 ° or less).
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
リング部と、このリング部から各々アキシャル方向へ突出する形で周方向に複数形成され、周方向に隣接するもの同士が転動体をなす玉を収容するポケットを形成する柱部とを備え、
各柱部は、該柱部の軸受内径側を構成する柱部内径側部分と、該柱部内径側部分に対しラジアル方向外端位置にて周方向両側に延出する形で接続する柱部外径側部分とからなり、ポケットの内面が柱部内径側部分と柱部外径側部分とにまたがる球面状に形成されるとともに、柱部内径側部分に対する柱部外径側部分の接続位置が、各ポケットに保持される複数の玉のピッチ円よりもラジアル方向外側に調整されることで、柱部内径側部分の接続位置における厚みをピッチ円位置における厚みよりも大きくなしている。
リング部と、このリング部から各々アキシャル方向へ突出する形で周方向に複数形成され、周方向に隣接するもの同士が転動体をなす玉を収容するポケットを形成する柱部とを備え、
各柱部は、該柱部の軸受内径側を構成する柱部内径側部分と、該柱部内径側部分に対しラジアル方向外端位置にて周方向両側に延出する形で接続する柱部外径側部分とからなり、ポケットの内面が柱部内径側部分と柱部外径側部分とにまたがる球面状に形成されるとともに、柱部内径側部分に対する柱部外径側部分の接続位置が、各ポケットに保持される複数の玉のピッチ円よりもラジアル方向外側に調整されることで、柱部内径側部分の接続位置における厚みをピッチ円位置における厚みよりも大きくなした。
3 柱部
3A 柱部内径側部分
3B 柱部外径側部分
PCD ピッチ円径
4 玉
5 ポケット
11 アンギュラ玉軸受
12,13 内外輪
Claims (4)
- アンギュラ玉軸受の転動体をなす複数の玉を、内外輪間にて規定の間隔で転動可能に保持する樹脂冠型保持器であって、
リング部と、このリング部から各々アキシャル方向へ突出する形で周方向に複数形成され、周方向に隣接するもの同士が転動体をなす玉を収容するポケットを形成する柱部とを備え、
各前記柱部は、該柱部の軸受内径側を構成する柱部内径側部分と、該柱部内径側部分に対しラジアル方向外端位置にて周方向両側に延出する形で接続する柱部外径側部分とからなり、前記ポケットの内面が前記柱部内径側部分と前記柱部外径側部分とにまたがる球面状に形成されるとともに、前記柱部内径側部分に対する前記柱部外径側部分の接続位置が、各前記ポケットに保持される複数の前記玉のピッチ円よりもラジアル方向外側に調整されることで、前記柱部内径側部分の前記接続位置における厚みを前記ピッチ円位置における厚みよりも大きくなした、アンギュラ玉軸受用樹脂保持器。 - 前記柱部内径側部分の前記ピッチ円位置における厚みが0.3mm以上0.6mm以下に調整されてなる請求項1記載のアンギュラ玉軸受用樹脂保持器。
- 前記柱部のラジアル方向外周面は、アキシャル方向にて前記リング部の位置する第一端側部分を該リング部及び前記柱部外径側部分が形成し、前記第一端側部分からラジアル方向外向きに突出する前記柱部外径側部分が前記外周面の残余の第二端側部分を形成するとともに、前記保持器を成型する分割金型のパーティング面が、前記リング部の位置する側にて反対側よりも径小となるテーパ面をなす形で、前記第一端側部分とその前記柱部外径側部分側への延長を包含する形で前記ピッチ円位置よりもラジアル方向外側に設定されてなる請求項1記載のアンギュラ玉軸受用樹脂保持器。
- 前記パーティング面の前記軸受中心軸線に対する割り角度が0.3゜以上5゜以下に設定されてなる請求項3記載のアンギュラ玉軸受用樹脂保持器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN201080029417.0A CN102472323B (zh) | 2009-06-29 | 2010-06-21 | 角接触球轴承用树脂保持器 |
US13/322,693 US8480305B2 (en) | 2009-06-29 | 2010-06-21 | Resin cage for angular contact ball bearing |
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JP2009153377 | 2009-06-29 | ||
JP2009-153377 | 2009-06-29 | ||
JP2010120154A JP5429567B2 (ja) | 2009-06-29 | 2010-05-26 | アンギュラ玉軸受用樹脂保持器 |
JP2010-120154 | 2010-05-26 |
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JP (1) | JP5429567B2 (ja) |
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US20120087612A1 (en) | 2012-04-12 |
US8480305B2 (en) | 2013-07-09 |
JP2011027257A (ja) | 2011-02-10 |
CN102472323A (zh) | 2012-05-23 |
CN102472323B (zh) | 2014-03-12 |
JP5429567B2 (ja) | 2014-02-26 |
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