TWI568943B - Crown retainer and bevel ball bearing - Google Patents
Crown retainer and bevel ball bearing Download PDFInfo
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- TWI568943B TWI568943B TW104121539A TW104121539A TWI568943B TW I568943 B TWI568943 B TW I568943B TW 104121539 A TW104121539 A TW 104121539A TW 104121539 A TW104121539 A TW 104121539A TW I568943 B TWI568943 B TW I568943B
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- ball
- ring
- column
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/41—Ball cages comb-shaped
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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
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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
- F16C33/44—Selection of substances
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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
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Description
本發明係關於一種冠型保持器及斜角滾珠軸承。 The present invention relates to a crown retainer and a bevel ball bearing.
於NC車床、銑刀盤、自動換刀數位控制機床(machining center)、複合加工機、五軸加工機等工作機械，或主軸台或安裝加工物之機座之直動輸送機構中，使用將旋轉運動轉換為直線運動之滾珠螺桿。作為旋轉支持該滾珠螺桿軸端之軸承採用斜角滾珠軸承(例如，參照專利文獻1)。此種斜角滾珠軸承根據所使用之工作機械之主軸台或安裝加工物之機座之種類或大小，使用軸承內徑為 15mm~ 130mm左右尺寸者。 Used in NC lathes, milling cutters, automatic tool changer (machining center), multi-tasking machines, five-axis machining machines, etc., or in the direct-moving mechanism of the spindle table or the frame on which the workpiece is mounted. The rotary motion is converted into a ball screw that moves in a straight line. An orbital ball bearing is used as the bearing that rotatably supports the ball screw shaft end (for example, refer to Patent Document 1). Such an angled ball bearing uses the inner diameter of the bearing according to the type or size of the spindle table of the working machine used or the frame on which the workpiece is mounted. 15mm~ About 130mm size.
加工中所產生之切削載荷，或以急加速使主軸台及機座移動時之慣性載荷係經由滾珠螺桿作為軸向載荷負荷於斜角滾珠軸承。於最近之工作機械中，存在基於高效率加工目的下切削載荷或快速旋入(fast-forwarding)引起之慣性載荷增大，而對滾珠螺桿支撐用斜角滾珠軸承負荷較大之軸向載荷之傾向。 The cutting load generated during machining or the inertial load when the headstock and the base are moved by rapid acceleration are applied to the bevel ball bearing via the ball screw as an axial load. In recent work machines, there is an increase in inertial load due to high-efficiency machining for cutting loads or fast-forwarding, and an axial load with large load on bevel ball bearings for ball screw support. tendency.
因此，於使用此種滾珠螺桿支撐用之斜角滾珠軸承中，為了使滾動疲勞壽命增加，必須兼顧負荷容量增加、與用以維持加工精度之高剛性。 Therefore, in the use of the bevel ball bearing for supporting the ball screw, in order to increase the rolling fatigue life, it is necessary to achieve both an increase in the load capacity and a high rigidity for maintaining the machining accuracy.
為了兼顧該等，增大軸承尺寸時，可應對較多之組合行數。但若增大軸承尺寸，則導致滾珠螺桿軸端之空間增加。又，組合行數過度增多時導致成為滾珠螺桿單元部分構成為寬度較寬。結果，由於引 起工作機械必要地面面積增加或高度方向尺寸增加，故對軸承之大型化或行數增加存在限制。 In order to balance these and increase the bearing size, it is possible to cope with a large number of combined rows. However, if the bearing size is increased, the space of the shaft end of the ball screw is increased. Further, when the number of combined rows is excessively increased, the ball screw unit portion is formed to have a wide width. Result, due to Since the necessary working area of the working machine is increased or the height direction is increased, there is a limit to the increase in the size of the bearing or the increase in the number of rows.
又，於先前之斜角滾軸軸承中，使用於軸向兩側具有一對環之傾斜形切制保持器(金屬削出或射出成型之樹脂保持器)(例如，參照專利文獻2或3)。此種兩側環構造之保持器雖強度方面較為良好，但當為軸承之兩端面安裝有密封件之構造之情形時，軸向之空間不足。又，軸承內部空間之容積亦減少，而使封入油脂量亦受到限制。 Further, in the prior oblique-angle roller bearing, an inclined-shaped cutting holder (metal-cut or injection-molded resin holder) having a pair of rings on both sides in the axial direction is used (for example, refer to Patent Document 2 or 3). ). Although the retainer of the double-sided ring structure is relatively good in strength, when the structure of the seal is attached to both end faces of the bearing, the space in the axial direction is insufficient. Moreover, the volume of the internal space of the bearing is also reduced, and the amount of grease to be sealed is also limited.
[專利文獻1]日本專利特開2000-104742號公報 [Patent Document 1] Japanese Patent Laid-Open Publication No. 2000-104742
[專利文獻2]日本專利特開2005-61508號公報 [Patent Document 2] Japanese Patent Laid-Open Publication No. 2005-61508
[專利文獻3]日本實開平3-49417號公報 [Patent Document 3] Unexamined Japanese Patent Publication No. 3-49417
本發明係鑒於上述情況而完成者，目的在於提供可於有限之空間中兼顧負荷容量增加與高剛性之冠型保持器及斜角滾珠軸承。 The present invention has been made in view of the above circumstances, and an object thereof is to provide a crown type cage and a bevel ball bearing which can achieve both load capacity increase and high rigidity in a limited space.
本發明之上述目的係藉由下述之構成達成。 The above object of the present invention is achieved by the following constitution.
(1)一種冠型保持器，其係以射出成型製造之滾珠軸承用之冠型保持器，其包含：大致圓環狀之環部；複數個柱部，其等自上述環部之正面側或背面側以特定間隔突出於軸向；及複數個凹孔部，其等形成於相鄰之上述柱部之間，且可分別保持滾珠；藉由於上述柱部之前端，於周向中間設置缺口部，而於周向兩 側形成一對爪部；相鄰之上述滾珠彼此之距離L與將圓周率π乘以滾珠節圓直徑dm而得之滾珠節圓周長πdm之關係滿足2.5×10-3≦L/πdm≦13×10-3，上述柱部之圓周方向最小壁厚M、上述爪部之圓周方向寬度N、及上述滾珠節圓周長πdm之關係滿足-3.5×10-3≦(M-2N)/πdm<0。 (1) A crown type retainer which is a crown type retainer for ball bearings manufactured by injection molding, comprising: a substantially annular ring portion; a plurality of column portions, which are from a front side of the ring portion Or the back side protrudes in the axial direction at a specific interval; and a plurality of concave hole portions are formed between the adjacent column portions, and the balls can be respectively held; and the front end of the column portion is disposed in the middle of the circumference a notch portion, and a pair of claw portions are formed on both sides in the circumferential direction; a distance L between the adjacent balls and a relationship between a circumference ratio π multiplied by a ball pitch circle diameter dm and a ball joint circumference length πdm satisfy 2.5 × 10 - 3 ≦ L / πdm ≦ 13 × 10 -3 , the relationship between the minimum wall thickness M of the column portion in the circumferential direction, the circumferential width N of the claw portion, and the circumferential length πdm of the ball joint satisfies -3.5 × 10 -3 ≦ ( M-2N) / πdm < 0.
(2)如技術方案(1)之冠型保持器，其中上述凹孔部之球面中心位置和上述環部之最外徑部與最內徑部之徑向中心位置係於徑向偏移。 (2) The crown-type retainer according to (1), wherein a spherical center position of the recessed portion and a radial center position of the outermost diameter portion and the innermost diameter portion of the ring portion are radially offset.
(3)如技術方案(1)之冠型保持器，其中上述凹孔部之球面中心位置和上述環部之最外徑部與最內徑部之徑向中心位置係於徑向一致。 (3) The crown-type retainer according to (1), wherein a spherical center position of the recessed portion and a radial center position of the outermost diameter portion and the innermost diameter portion of the ring portion are in the radial direction.
(4)一種斜角滾珠軸承，其包含如技術方案(1)~(3)中任一項之冠型保持器。 (4) An oblique-angle ball bearing comprising the crown-type retainer according to any one of the aspects (1) to (3).
根據本發明之冠型保持器，因滿足2.5×10-3≦L/πdm≦13×10-3，故可增加軸承每行(滾珠節圓上)之滾珠數量，從而可實現軸承之負荷容量增加與高剛性。另，假設2.5×10-3>L/πdm，則因保持器之柱部之圓周方向壁厚變得過薄，於成形或切削時造成裂孔。尤其當冠型保持器之材料即合成樹脂中含有較多強化材時，則會引起成形時合成樹脂之流動性變差，而更容易出現裂孔。又，若L/πdm>13×10-3，則滾珠數量減少，而導致載荷負荷能力及剛性降低。 According to the crown retainer of the present invention, since 2.5×10 -3 ≦L/πdm ≦ 13×10 -3 is satisfied, the number of balls per row of the bearing (on the ball circle) can be increased, thereby realizing the load capacity of the bearing. Increased with high rigidity. Further, assuming that 2.5 × 10 -3 > L / πdm, the thickness of the column portion of the retainer in the circumferential direction becomes too thin, causing a crack at the time of molding or cutting. In particular, when the material of the crown type retainer, that is, the synthetic resin, contains a large amount of the reinforcing material, the fluidity of the synthetic resin at the time of molding is deteriorated, and the crack hole is more likely to occur. Further, when L/πdm > 13 × 10 -3 , the number of balls is reduced, resulting in a decrease in load carrying capacity and rigidity.
又，因滿足-3.5×10-3≦(M-2N)/πdm<0，故以軸向拉伸(Axial draw)方式之射出成型製作冠型保持器時，於脫模步驟中，不會損傷柱部前端之一對爪部，即可沿軸向拔出形成凹孔部之模具構件。假設-3.5×10-3>(M-2N)/πdm，則脫模時會產生爪部之龜裂或殘缺，而有導致保持器之功能方面出現問題之可能性。又，若(M-2N)/πdm≧0，雖 不會產生柱部前端之一對爪部間之壓縮干涉，但因相鄰之一對凹孔部間之距離增大，結果導致滾珠節圓上所配置之滾珠數量之減少，而有降低載荷負荷能力及剛性之虞。 Further, since -3.5 × 10 -3 ≦ (M - 2N) / πdm < 0 is satisfied, when the crown-type holder is produced by injection molding by axial drawing (Axial draw), it is not in the demolding step. One of the front ends of the column portion is damaged, and the mold member forming the concave portion can be pulled out in the axial direction. Assuming -3.5 × 10 -3 > (M - 2 N) / π dm, cracks or defects of the claws may occur during demolding, and there is a possibility that problems occur in the function of the retainer. Further, if (M-2N)/πdm≧0, the compression interference between one of the tips of the column portion and the claw portion does not occur, but the distance between the adjacent one of the pair of the concave hole portions increases, resulting in a ball joint. The number of balls placed on the circle is reduced, and there is a reduction in load carrying capacity and rigidity.
1‧‧‧斜角滾珠軸承 1‧‧‧Bevel ball bearings
3‧‧‧滾珠 3‧‧‧ balls
4‧‧‧端面 4‧‧‧ end face
5‧‧‧端面 5‧‧‧ end face
10‧‧‧外環 10‧‧‧Outer Ring
11‧‧‧軌道面 11‧‧‧Track surface
12‧‧‧外環槽肩部 12‧‧‧Outer ring shoulder
13‧‧‧外環埋頭孔 13‧‧‧ outer ring countersink
14‧‧‧外環倒角 14‧‧‧Outer ring chamfer
15‧‧‧外環密封槽 15‧‧‧Outer ring seal groove
20‧‧‧內環 20‧‧‧ Inner Ring
21‧‧‧軌道面 21‧‧‧ Track surface
22‧‧‧內環槽肩部 22‧‧‧ Inner ring shoulder
23‧‧‧內環埋頭孔 23‧‧‧ Inner ring countersink
24‧‧‧內環倒角 24‧‧‧ Inner ring chamfer
25‧‧‧內環密封槽 25‧‧‧ Inner ring seal groove
30‧‧‧冠型保持器 30‧‧‧ crown retainer
31‧‧‧環部 31‧‧‧ Ring Department
31a‧‧‧徑向內側面(徑向一側面、徑向另一側面) 31a‧‧‧ Radial inner side (radial one side, radial other side)
31b‧‧‧徑向外側面(徑向另一側面、徑向一側面) 31b‧‧‧ Radial outer side (radially side, radial side)
32‧‧‧柱部 32‧‧‧ Column Department
33‧‧‧凹孔部 33‧‧‧ recessed hole
33a‧‧‧圓弧 33a‧‧‧ arc
33b‧‧‧第1直線形狀部 33b‧‧‧1st linear shape
33c‧‧‧第2直線形狀部 33c‧‧‧2nd linear shape
33g‧‧‧第3直線形狀部 33g‧‧‧3rd linear shape
34‧‧‧缺口部 34‧‧‧Gap section
35‧‧‧角部 35‧‧‧ corner
36‧‧‧爪部 36‧‧‧ claws
40‧‧‧球狀模具 40‧‧‧Spherical mould
50‧‧‧密封構件 50‧‧‧ Sealing members
100‧‧‧深槽滾珠軸承 100‧‧‧Deep groove ball bearing
103‧‧‧滾珠 103‧‧‧ balls
110‧‧‧外環 110‧‧‧ outer ring
120‧‧‧內環 120‧‧‧ Inner Ring
130‧‧‧保持器 130‧‧‧keeper
131‧‧‧環部 131‧‧‧ Ring Department
132‧‧‧柱部 132‧‧‧ Column Department
133‧‧‧凹孔部 133‧‧‧ recessed hole
135‧‧‧角部 135‧‧‧ corner
136‧‧‧凹部 136‧‧‧ recess
137‧‧‧底面 137‧‧‧ bottom
A‧‧‧中心 A‧‧‧ Center
A‧‧‧箭頭 A‧‧‧ arrow
Ae‧‧‧將外環槽肩部之徑向高度除以滾珠之直徑而得者 Ae‧‧·The result is that the radial height of the shoulder of the outer ring is divided by the diameter of the ball.
Ai‧‧‧將內環槽肩部之徑向高度除以滾珠之直徑而得者 Ai‧‧‧The radius of the inner ring groove shoulder divided by the diameter of the ball
AB‧‧‧線段 AB‧‧‧ segment
B‧‧‧中心 B‧‧ Center
B‧‧‧箭頭 B‧‧‧ arrow
BO‧‧‧線段 BO‧‧‧ line segment
C‧‧‧交點 C‧‧‧ intersection
D‧‧‧交點 D‧‧‧ intersection
D1‧‧‧外徑 D1‧‧‧ OD
D2‧‧‧外徑 D2‧‧‧ OD
D3‧‧‧內徑 D3‧‧‧Inner diameter
D4‧‧‧內徑 D4‧‧‧Inner diameter
dm‧‧‧節圓直徑(滾珠節圓直徑) Dm‧‧‧ pitch diameter (ball circle diameter)
Dw‧‧‧直徑(滾珠直徑) Dw‧‧‧ diameter (ball diameter)
E‧‧‧中間點 E‧‧‧ intermediate point
EO‧‧‧線段 EO‧‧‧ line segment
He‧‧‧徑向高度 He‧‧‧ radial height
Hi‧‧‧徑向高度 Hi‧‧‧radial height
L‧‧‧滾珠間距離 L‧‧‧ Distance between balls
M‧‧‧圓周方向最小壁厚 M‧‧‧Minimum wall thickness
m‧‧‧徑向中間位置 M‧‧‧radial intermediate position
m1‧‧‧最外徑部 M1‧‧‧ outer diameter
m2‧‧‧最內徑部 M2‧‧‧ inner diameter
N‧‧‧圓周方向寬度 N‧‧‧ circumferential width
O‧‧‧中心 O‧‧ Center
Oi‧‧‧滾珠中心(凹孔部球面中心) Oi‧‧·ball center (recessed spherical center)
P‧‧‧中心 P‧‧‧ Center
R‧‧‧半徑 R‧‧‧ Radius
T‧‧‧滾珠中心間距離 T‧‧‧The distance between the center of the ball
X‧‧‧球徑尺寸(軸向距離) X‧‧‧ ball diameter size (axial distance)
Y‧‧‧距離(軸向距離) Y‧‧‧ distance (axial distance)
Z‧‧‧滾珠數量 Z‧‧‧Number of balls
θ‧‧‧角度 Θ‧‧‧ angle
α‧‧‧接觸角 ‧‧‧‧contact angle
πdm‧‧‧節圓周長 Πdm‧‧‧ circumference
圖1係本發明之第1實施形態之斜角滾珠軸承之剖視圖。 Fig. 1 is a cross-sectional view showing a bevel ball bearing according to a first embodiment of the present invention.
圖2係並行組合圖1之斜角滾珠軸承之剖視圖。 Figure 2 is a cross-sectional view of the beveled ball bearing of Figure 1 in parallel.
圖3係保持器之側視圖。 Figure 3 is a side view of the retainer.
圖4係自軸向一側觀察保持器之圖。 Figure 4 is a view of the retainer viewed from the axial side.
圖5係自軸向另一側觀察保持器之圖。 Figure 5 is a view of the retainer as viewed from the other side of the axial direction.
圖6係圖1及圖4之VI-VI剖視圖。 Figure 6 is a cross-sectional view taken along line VI-VI of Figures 1 and 4.
圖7係圖4之VII-VII剖面向視圖。 Figure 7 is a cross-sectional view taken along line VII-VII of Figure 4;
圖8係用於說明複數個滾珠之配置狀態之圖。 Fig. 8 is a view for explaining a configuration state of a plurality of balls.
圖9係一併顯示球狀型之保持器之剖視圖。 Fig. 9 is a cross-sectional view showing the retainer of the spherical type together.
圖10係本發明之第2實施形態之斜角滾珠軸承之剖視圖。 Fig. 10 is a cross-sectional view showing a bevel ball bearing according to a second embodiment of the present invention.
圖11係保持器之側視圖。 Figure 11 is a side view of the retainer.
圖12係自軸向一側觀察保持器之圖。 Figure 12 is a view of the retainer as viewed from the axial side.
圖13係自軸向另一側觀察保持器之圖。 Figure 13 is a view of the retainer as viewed from the other side of the axial direction.
圖14係本發明之第3實施形態之斜角滾珠軸承之剖視圖。 Figure 14 is a cross-sectional view showing a bevel ball bearing according to a third embodiment of the present invention.
圖15係自軸向一側觀察保持器之圖。 Figure 15 is a view of the retainer viewed from the axial side.
圖16係圖15之XVI-XVI剖面向視圖。 Figure 16 is a cross-sectional view taken along the line XVI-XVI of Figure 15.
圖17係本發明之第4實施形態之斜角滾珠軸承之剖視圖。 Figure 17 is a cross-sectional view showing a bevel ball bearing according to a fourth embodiment of the present invention.
圖18係自軸向一側觀察保持器之圖。 Figure 18 is a view of the retainer viewed from the axial side.
圖19係本發明之第5實施形態之斜角滾珠軸承之剖視圖。 Figure 19 is a cross-sectional view showing a bevel ball bearing according to a fifth embodiment of the present invention.
圖20係本發明之第5實施形態之變化例之斜角滾珠軸承之剖視圖。 Figure 20 is a cross-sectional view showing a bevel ball bearing according to a modification of the fifth embodiment of the present invention.
圖21係本發明之第6實施形態之斜角滾珠軸承之剖視圖。 Figure 21 is a cross-sectional view showing a bevel ball bearing according to a sixth embodiment of the present invention.
圖22係先前之深槽滾珠軸承之剖視圖。 Figure 22 is a cross-sectional view of a prior deep groove ball bearing.
圖23係自軸向觀察先前之保持器之圖。 Figure 23 is a view of the previous retainer viewed from the axial direction.
圖24係先前之保持器之側視圖。 Figure 24 is a side view of the prior holder.
以下，對本發明之實施形態之冠型保持器及斜角滾珠軸承，使用圖式進行說明。 Hereinafter, the crown type retainer and the angled ball bearing according to the embodiment of the present invention will be described with reference to the drawings.
如圖1所示，本實施形態之斜角滾珠軸承1包含：外環10，其於內周面具有軌道面11；內環20，其於外周面具有軌道面21；複數個滾珠3，其等配置於外環10及內環20之軌道面11、21之間；及保持器30，其係旋轉自由地保持滾珠3之滾珠引導方式。 As shown in Fig. 1, the bevel ball bearing 1 of the present embodiment includes an outer ring 10 having a raceway surface 11 on an inner circumferential surface, an inner ring 20 having a raceway surface 21 on an outer peripheral surface, and a plurality of balls 3, And the like is disposed between the outer ring 10 and the track faces 11 and 21 of the inner ring 20; and the retainer 30 is configured to rotatably hold the balls 3 in a ball guiding manner.
外環10之內周面具有：外環槽肩部12，其凸設於較軌道面11更背面側(負荷側，圖1中左側)；及外環埋頭孔13，其凹設於較軌道面11更正面側(相反負荷側，圖1中右側)。 The inner circumferential surface of the outer ring 10 has an outer ring groove shoulder portion 12 which is convexly disposed on the back side of the track surface 11 (load side, left side in FIG. 1); and an outer ring countersunk hole 13 which is recessed in the orbit Face 11 is more front side (opposite load side, right side in Figure 1).
內環20之外周面具有：內環槽肩部22，其凸設於較軌道面21更正面側(負荷側，圖1中右側)；及內環埋頭孔23，其凹設於較軌道面21更背面側(相反負荷側，圖1中左側)。 The outer circumferential surface of the inner ring 20 has an inner ring groove shoulder portion 22 which is protruded from the front side of the track surface 21 (load side, right side in FIG. 1); and an inner ring countersunk hole 23 which is recessed on the track surface 21 more back side (opposite load side, left side in Figure 1).
此處，將內環埋頭孔23之外徑設為D1，內環槽肩部22之外徑設為D2時，D1<D2。又，將外環埋頭孔13之內徑設為D3，外環槽肩部12之內徑設為D4時，D3>D4。如此，由於增大內環槽肩部22之外徑D2，縮小外環槽肩部12之內徑D4，故可較大地設定滾珠3之接觸角α。更具體而言，藉由如上述般設定外徑D2及內徑D4，可將接觸角α設為45°≦α≦65°左右。即使考慮軸承製作時接觸角α之不均，亦可設為50°≦α≦60°左右。如此，可增大接觸角α。 Here, when the outer diameter of the inner ring countersunk hole 23 is D1 and the outer diameter of the inner ring groove shoulder portion 22 is D2, D1 < D2. Further, when the inner diameter of the outer ring countersunk hole 13 is D3 and the inner diameter of the outer ring groove shoulder portion 12 is D4, D3>D4. Thus, since the outer diameter D2 of the inner ring groove shoulder portion 22 is increased and the inner diameter D4 of the outer ring groove shoulder portion 12 is reduced, the contact angle ? of the balls 3 can be set large. More specifically, by setting the outer diameter D2 and the inner diameter D4 as described above, the contact angle α can be set to about 45°≦α≦65°. Even if the unevenness of the contact angle α during bearing production is considered, it can be set to about 50°≦α≦60°. In this way, the contact angle α can be increased.
又，將內環槽肩部22之徑向高度Hi除以滾珠3之直徑Dw而得者設為Ai(Ai=Hi/Dw)時，設定為滿足0.35≦Ai≦0.50。將外環槽肩部12之 徑向高度He除以滾珠3之直徑Dw而得者設為Ae(Ae=He/Dw)時，設定為滿足0.35≦Ae≦0.50。 Moreover, when the radial height Hi of the inner ring groove shoulder portion 22 is divided by the diameter Dw of the ball 3 and Ai (Ai = Hi / Dw) is obtained, it is set to satisfy 0.35 ≦ Ai ≦ 0.50. Outer ring groove shoulder 12 When the radial height He is divided by the diameter Dw of the ball 3 and is set to Ae (Ae = He / Dw), it is set to satisfy 0.35 ≦ Ae ≦ 0.50.
假定，於0.35>Ai或0.35>Ae之情形時，由於內環槽肩部22或外環槽肩部12之徑向高度Hi、He相對於滾珠3之直徑Dw過小，故接觸角α不滿45°，導致軸承軸向載荷之負荷能力不足。又，於0.50<Ai或0.50<Ae之情形時，由於外環10及內環20之軌道面11、21形成為超出滾珠3之節圓直徑dm，故外環槽肩部12及內環槽肩部22之研削加工較困難，故不被期望。 It is assumed that in the case of 0.35>Ai or 0.35>Ae, since the radial heights Hi, He of the inner ring groove shoulder 22 or the outer ring groove shoulder 12 are too small with respect to the diameter Dw of the ball 3, the contact angle α is less than 45. °, the load capacity of the bearing axial load is insufficient. Further, in the case of 0.50 < Ai or 0.50 < Ae, since the raceway faces 11 and 21 of the outer ring 10 and the inner ring 20 are formed to exceed the pitch diameter dm of the ball 3, the outer ring groove shoulder portion 12 and the inner ring groove The grinding of the shoulder 22 is difficult and is not expected.
又，於外環槽肩部12之背面側端部，設有隨著朝向背面側而朝向徑向外側之錐形狀之外環倒角14。於內環槽肩部22之正面側端部，設有隨著朝向正面側而朝向徑向內側之錐形狀之內環倒角24。該等外環倒角14及內環倒角24之徑向寬度大於外環槽肩部12及內環槽肩部22之徑向高度He、Hi之一半，設定為比較大之值。 Further, at the end portion on the back side of the outer ring groove shoulder portion 12, a ring chamfer 14 is provided in a tapered shape which faces the outer side in the radial direction toward the back side. At the front end portion of the inner ring groove shoulder portion 22, an inner ring chamfer 24 having a tapered shape toward the radially inner side toward the front side is provided. The radial width of the outer ring chamfer 14 and the inner ring chamfer 24 is greater than one of the radial heights He, Hi of the outer ring groove shoulder portion 12 and the inner ring groove shoulder portion 22, and is set to a relatively large value.
此種斜角滾珠軸承1係如圖2所示，可並行組合使用。由於本實施形態之斜角滾珠軸承1係將外環槽肩部12及內環槽肩部22設至滾珠3之節圓直徑dm之附近，故假定不設置外環倒角14及內環倒角24，則一個斜角滾珠軸承1之內環20與另一個斜角滾珠軸承1之外環10產生干涉，導致軸承旋轉中產生不良。又，於以油潤滑使用之情形時，假定不設置外環倒角14及內環倒角24，則油將不通過各斜角滾珠軸承1之間，而導致油不滯留性惡化，而因潤滑不良，或油大量殘留於軸承內部引起溫度上升。如此，藉由設置外環倒角14及內環倒角24，可實現防止內環20及外環10彼此之干涉，及提高油不滯留性。另，不一定需要設置外環倒角14及內環倒角24兩者，只要設置至少一者即可。 Such a bevel ball bearing 1 is shown in Fig. 2 and can be used in combination in parallel. Since the bevel ball bearing 1 of the present embodiment has the outer ring groove shoulder portion 12 and the inner ring groove shoulder portion 22 disposed near the pitch diameter dm of the ball 3, it is assumed that the outer ring chamfer 14 and the inner ring are not provided. At the angle 24, the inner ring 20 of one bevel ball bearing 1 interferes with the outer ring 10 of the other bevel ball bearing 1, causing a defect in the rotation of the bearing. Moreover, in the case of oil lubrication, it is assumed that the outer ring chamfer 14 and the inner ring chamfer 24 are not provided, the oil will not pass between the respective bevel ball bearings 1, and the oil retention property is deteriorated, and Poor lubrication, or a large amount of oil remaining inside the bearing causes a temperature rise. Thus, by providing the outer ring chamfer 14 and the inner ring chamfer 24, it is possible to prevent the inner ring 20 and the outer ring 10 from interfering with each other and to improve the oil non-retention property. In addition, it is not necessary to provide both the outer ring chamfer 14 and the inner ring chamfer 24, as long as at least one is provided.
接著，參照圖3~7，對冠型保持器30之構成進行詳述。冠型保持器30係包含合成樹脂之滾珠引導方式之塑膠保持器，構成該冠型保持器30之基礎樹脂係聚醯胺樹脂。另，聚醯胺樹脂之種類並無限制 者，除聚醯胺樹脂之外，亦可為聚縮醛樹脂、聚苯硫醚、聚二醚酮、聚醯亞胺等其他合成樹脂。進而，於基礎樹脂中，可添加作為強化材之玻璃纖維、碳纖維、芳香族聚醯胺纖維等。又，冠型保持器30係以射出成形或切削加工製造。 Next, the configuration of the crown holder 30 will be described in detail with reference to Figs. The crown holder 30 is a plastic holder that includes a ball-guided method of synthetic resin, and constitutes a base resin-based polyamide resin of the crown-type holder 30. In addition, there is no limit to the type of polyamide resin. In addition to the polyamine resin, other synthetic resins such as polyacetal resin, polyphenylene sulfide, polydiether ketone, and polyimide may be used. Further, glass fibers, carbon fibers, aromatic polyamide fibers, and the like as a reinforcing material may be added to the base resin. Further, the crown holder 30 is manufactured by injection molding or cutting.
冠型保持器30具有：配置於與內環20及外環10同軸之大致圓環狀之環部31(參照圖1)、自環部31之背面側以特定間隔於軸向突出之複數個柱部32、及形成於相鄰之柱部32之間之複數個凹孔部33。 The crown holder 30 has a substantially annular ring portion 31 (see FIG. 1) disposed coaxially with the inner ring 20 and the outer ring 10, and a plurality of protrusions in the axial direction at a predetermined interval from the back side of the ring portion 31. The column portion 32 and a plurality of recessed holes 33 formed between the adjacent column portions 32.
此處，於本實施形態之斜角滾珠軸承1中，由於為了實現軸向載荷之高負荷能力，而增大外環槽肩部12及內環槽肩部22之徑向高度He、Hi，故軸承內部空間減少。因此，由於此種軸承內部空間所配置之冠型保持器30為單側環構造，故而設為將環部31配置於外環埋頭孔13與內環槽肩部22之間，將柱部32配置於外環10及內環20之軌道面11、21之間，環部31連接至柱部32之徑向外側端部之構造。 Here, in the bevel ball bearing 1 of the present embodiment, the radial heights He and Hi of the outer ring groove shoulder portion 12 and the inner ring groove shoulder portion 22 are increased in order to achieve a high load capacity for the axial load. Therefore, the internal space of the bearing is reduced. Therefore, since the crown holder 30 disposed in the inner space of the bearing has a one-side ring structure, the ring portion 31 is disposed between the outer ring counterbore 13 and the inner ring groove portion 22, and the column portion 32 is disposed. The ring portion 31 is disposed between the outer ring 10 and the track faces 11 and 21 of the inner ring 20, and the ring portion 31 is connected to the radially outer end portion of the column portion 32.
亦即，如圖7所示，設為凹孔部33之球面中心位置較環部31之最外徑部m1與最內徑部m2之徑向位置m偏移至徑向內側(徑向一側)之構造。此處，凹孔部33之球面中心位置係與凹孔部33之曲率半徑之中心一致之位置。又，環部31之最外徑部m1係徑向外側面31b，最內徑部m2係徑向內側面31a。另，於圖示之例中，凹孔部33之球面中心位置較環部31之最內徑部m2偏移至徑向內側。 That is, as shown in Fig. 7, the spherical center position of the concave hole portion 33 is shifted from the radial position m of the outermost diameter portion m1 and the innermost diameter portion m2 of the ring portion 31 to the radially inner side (radial one) Side) construction. Here, the spherical center position of the recessed portion 33 is at a position that coincides with the center of the radius of curvature of the recessed portion 33. Further, the outermost diameter portion m1 of the ring portion 31 is a radially outer side surface 31b, and the innermost diameter portion m2 is a radially inner side surface 31a. Further, in the illustrated example, the spherical center position of the recessed portion 33 is shifted to the radially inner side from the innermost diameter portion m2 of the ring portion 31.
如圖7所示，形成凹孔部33之柱部32之自周向觀察時之側面係將連結環部31之徑向內側面(徑向一側面)31a與徑向外側面(徑向另一側面)31b之圓弧33a之一部分缺除而形成者。圓弧33a之中心以P表示，半徑以r表示。 As shown in Fig. 7, the side surface of the column portion 32 forming the recessed portion 33 when viewed from the circumferential direction is a radially inner side surface (radial side surface) 31a and a radially outer side surface of the coupling ring portion 31 (radially A part of the arc 33a of one side) 31b is partially formed and is formed. The center of the arc 33a is denoted by P, and the radius is denoted by r.
更具體而言，柱部32之自周向觀察時之側面包含將圓弧33a於徑向內側部(徑向一端部)缺除且設為於軸向延伸而形成之第1直線形狀部33b。第1直線形狀部33b係配置於較圓弧33a之中心P更靠背面側。 又，第1直線形狀部33b與滾珠3之中心Oi(凹孔部33之球面中心)於軸向重疊。 More specifically, the side surface of the column portion 32 when viewed from the circumferential direction includes the first linear shape portion 33b which is formed by extending the circular arc 33a in the radially inner portion (the radial end portion) and extending in the axial direction. . The first linear shape portion 33b is disposed closer to the back surface side than the center P of the circular arc 33a. Further, the first linear portion 33b and the center Oi of the ball 3 (the spherical center of the concave portion 33) overlap in the axial direction.
進而，柱部32之自周向觀察時之側面包含第2直線形狀部33c，其係以將圓弧33a於連結第1直線形狀部33b之正面側之端部與環部31之徑向內側面31a之背面側之端部之部分缺除而形成。因此，第2直線形狀部33c係設為隨著朝向正面側(環部31側)，而朝向徑向外側之直線形狀。 Further, the side surface of the column portion 32 when viewed from the circumferential direction includes the second linear portion 33c in which the arc portion 33a is connected to the end portion on the front side of the first linear portion 33b and the radially inner portion of the ring portion 31. A portion of the end portion on the back side of the side surface 31a is formed to be missing. Therefore, the second linear portion 33c has a linear shape that faces outward in the radial direction as it goes toward the front side (the side of the ring portion 31).
又，柱部32之自周向觀察時之側面包含第3直線形狀部33g，其係以將圓弧33a之徑向外側端部(徑向另一側端部)缺除並朝軸向延伸之方式形成。第3直線形狀部33g與環部31之徑向外側面31b形成於同一平面上，且與該徑向外側面31b無階差地連接。 Further, the side surface of the column portion 32 when viewed from the circumferential direction includes the third linear portion 33g which is formed by missing the radially outer end portion (the other end portion in the radial direction) of the circular arc 33a and extending in the axial direction. The way it is formed. The third linear shape portion 33g is formed on the same plane as the radially outer surface 31b of the ring portion 31, and is connected to the radially outer side surface 31b without a step.
如此，柱部32之自周向觀察時之側面成為連接第3直線形狀部33g、圓弧33a、第1直線形狀部33b、及第2直線形狀部33c之形狀。 In this manner, the side surface of the column portion 32 when viewed from the circumferential direction has a shape in which the third linear portion 33g, the circular arc 33a, the first linear portion 33b, and the second linear portion 33c are connected.
又，如圖6所示，形成凹孔部33之柱部32之周向兩側面、及環部31之背面側(柱部32側)之側面係形成為與滾珠3相似形狀之球面狀。此處，柱部32之前端係於周向中間設有缺口部34，且分為兩支。而且，於柱部32之前端，於缺口部34之周向兩側形成一對爪部36。此處，雖將本實施形態之缺口部34設為剖面大致V字形狀之銳利之形狀，但並非限定於該形狀者，例如亦可具有固定平面(例如0.1mm以上之平面)作為底面。藉由如此設置缺口部34，於以軸向拉伸方式之射出成型製造冠型保持器30時，即使強制拔出形成凹孔部33之模具構件，因一對爪部36朝缺口部34側彈性變形，故可防止柱部32之凹孔部33側之角部35之破損。 Further, as shown in FIG. 6, the circumferential side surfaces of the column portion 32 in which the recessed hole portion 33 is formed and the side surface on the back surface side (the column portion 32 side) of the ring portion 31 are formed in a spherical shape similar to the shape of the ball 3. Here, the front end of the column portion 32 is provided with a notch portion 34 in the circumferential direction, and is divided into two. Further, at the front end of the column portion 32, a pair of claw portions 36 are formed on both circumferential sides of the notch portion 34. Here, the notch portion 34 of the present embodiment has a sharp shape having a substantially V-shaped cross section. However, the shape is not limited to the shape. For example, the notch portion 34 may have a fixed plane (for example, a plane of 0.1 mm or more) as a bottom surface. When the crown holder 30 is produced by injection molding in the axial direction by the provision of the notch portion 34, even if the mold member forming the recessed portion 33 is forcibly pulled out, the pair of claw portions 36 are directed toward the notch portion 34 side. Since it is elastically deformed, it is possible to prevent breakage of the corner portion 35 on the side of the recessed portion 33 of the column portion 32.
又，對冠型保持器30材料之合成樹脂所添加之強化材之比例係較好設為5~30重量%。假定，合成樹脂成分中強化材之比例超過30重量%，則由於冠型保持器30之柔軟性降低，故於冠型保持器30成形 時自凹孔部33強制拔出模具時，或組裝軸承時將滾珠3壓入至凹孔部33時，會引起柱部32之角部35破損。又，由於冠型保持器30之熱膨脹依存於基礎材料即樹脂材料之線膨脹係數，故若強化材之比例少於5重量%，則軸承旋轉中冠型保持器30之熱膨脹相對於滾珠3之節圓直徑dm之膨脹變大，導致滾珠3與冠型保持器30之凹孔部33相抵，產生燒焦等不良。因此，藉由將合成樹脂成分中強化材之比例設為5~30重量%之範圍，可防止上述不良。 Further, the ratio of the reinforcing material added to the synthetic resin of the material of the crown holder 30 is preferably 5 to 30% by weight. It is assumed that the proportion of the reinforcing material in the synthetic resin component exceeds 30% by weight, and the crown retainer 30 is formed because the flexibility of the crown retainer 30 is lowered. When the mold is forcibly pulled out from the recessed portion 33 or when the ball 3 is pressed into the recessed portion 33 when the bearing is assembled, the corner portion 35 of the column portion 32 is broken. Further, since the thermal expansion of the crown retainer 30 depends on the linear expansion coefficient of the base material, that is, the resin material, if the proportion of the reinforcing material is less than 5% by weight, the thermal expansion of the crown retainer 30 in the bearing rotation is relative to the ball 3 The expansion of the pitch diameter dm becomes large, causing the balls 3 to collide with the recessed portions 33 of the crown holder 30, causing defects such as scorching. Therefore, the above-mentioned defects can be prevented by setting the ratio of the reinforcing material in the synthetic resin component to a range of 5 to 30% by weight.
又，作為冠型保持器30之合成樹脂材料，應用聚醯胺、聚醚醚酮、聚苯硫醚、聚醯亞胺等樹脂。作為合成樹脂之強化材，應用玻璃纖維、碳纖維、芳香族聚醯胺纖維等。 Further, as the synthetic resin material of the crown holder 30, a resin such as polyamine, polyether ether ketone, polyphenylene sulfide or polyimine is used. As the reinforcing material of the synthetic resin, glass fiber, carbon fiber, aromatic polyamide fiber or the like is used.
又，本實施形態之斜角滾珠軸承1中為了增大軸向載荷負荷能力，而設定為滾珠3之數量(滾珠數量Z)較多。更具體而言，使用圖8進行說明。於圖8中，顯示配置於直徑dm之節圓上之兩個滾珠3。將該等滾珠3之直徑設為Dw，將該等滾珠3之中心設為A、B，將線段AB與滾珠3表面之交點設為C、D，將線段AB之中點設為E，將節圓之中心設為O。又，將相鄰之滾珠3之中心A、B彼此之距離(線段AB之距離)即滾珠中心間距離設為T，將相鄰之滾珠3彼此之距離(線段CD之距離)即滾珠間距離設為L，將線段EO與線段BO所形成之角度(線段EO與線段AO所形成之角度)設為θ。如此，線段AO及線段BO之距離係(dm/2)，滾珠中心間距離T係(dm×sinθ)，滾珠間距離L係(T-Dw)，角度θ係(180°/Z)。 Further, in the bevel ball bearing 1 of the present embodiment, in order to increase the axial load carrying capacity, the number of balls 3 (the number of balls Z) is set to be large. More specifically, it demonstrates using FIG. In Fig. 8, two balls 3 arranged on the pitch circle of the diameter dm are shown. The diameter of the balls 3 is Dw, the centers of the balls 3 are A and B, and the intersection of the line segment AB and the surface of the ball 3 is C and D, and the point among the line segments AB is set to E. The center of the pitch circle is set to O. Further, the distance between the centers A and B of the adjacent balls 3 (the distance between the line segments AB), that is, the distance between the centers of the balls is T, and the distance between the adjacent balls 3 (the distance between the line segments CD), that is, the distance between the balls Let L be the angle formed by the line segment EO and the line segment BO (the angle formed by the line segment EO and the line segment AO) as θ. Thus, the distance between the line segment AO and the line segment BO is (dm/2), the distance between the centers of the balls is T (dm × sin θ), the distance between the balls is L (T-Dw), and the angle θ is (180 ° / Z).
而且，滾珠間距離L與將圓周率π乘以滾珠節圓直徑dm而得之滾珠3節圓周長πdm之間，以2.5×10-3≦L/πdm≦13×10-3之關係成立之方式設計。假定，L/πdm小於2.5×10-3，則冠型保持器30之柱部32之圓周方向壁厚過薄，導致成形時或切削時裂孔。尤其當冠型保持器30之材料即合成樹脂含有較多強化材時，成形時合成樹脂之流動性變差，容 易裂孔。又，當L/πdm大於13×10-3時，滾珠數量Z減少，軸承之軸向載荷負荷能力及剛性降低。 Further, the distance between the balls L and the circumferential length πdm of the balls 3 obtained by multiplying the circumference ratio π by the ball pitch diameter dm are established in a relationship of 2.5 × 10 -3 ≦L/πdm ≦ 13 × 10 -3 . design. Assuming that L/πdm is less than 2.5 × 10 -3 , the circumferential wall thickness of the column portion 32 of the crown holder 30 is too thin, resulting in cracking at the time of molding or cutting. In particular, when the synthetic resin of the material of the crown holder 30 contains a large amount of the reinforcing material, the fluidity of the synthetic resin is deteriorated during molding, and the hole is easily broken. Further, when L/πdm is larger than 13 × 10 -3 , the number of balls Z is decreased, and the axial load carrying capacity and rigidity of the bearing are lowered.
如此，斜角滾珠軸承1設計為滿足2.5×10-3≦L/πdm≦13×10-3，即滾珠數量Z較多，無法使冠型保持器30之柱部32之圓周方向壁厚相對於標準軸承增厚。而且，如圖6所示，隨著柱部32之圓周方向最小壁厚M變薄，爪部36之圓周方向寬度N亦變小。因此，於以軸向拉伸方式之射出成型製作冠型保持器30時，為脫模步驟中不損傷柱部32即可沿軸向拔取形成凹孔部33之模具構件，有必要將該等圓周方向最小壁厚M及圓周方向寬度N進行適當設定。更具體而言，使用圖9進行說明。 Thus, the bevel ball bearing 1 is designed to satisfy 2.5 × 10 -3 ≦L / πdm ≦ 13 × 10 -3 , that is, the number of balls Z is large, and the circumferential wall thickness of the column portion 32 of the crown holder 30 cannot be made relative to Standard bearings are thickened. Further, as shown in FIG. 6, as the minimum wall thickness M in the circumferential direction of the column portion 32 becomes thinner, the circumferential width N of the claw portion 36 also becomes smaller. Therefore, when the crown holder 30 is produced by injection molding in the axial stretching mode, the mold member forming the recessed portion 33 can be extracted in the axial direction without damaging the column portion 32 in the demolding step, and it is necessary to The minimum wall thickness M in the circumferential direction and the width N in the circumferential direction are appropriately set. More specifically, it will be described using FIG.
於軸向拉伸方式之射出成型之情形時，於將冠型保持器30自模具內部拔出時，模具朝冠型保持器30之軸向相對移動。使凹孔部33之內部形狀形成之球狀模具40係使形成於柱部32前端且相互對向之一對爪部36朝缺口部34沿圓周方向(圖中，箭頭A方向)彈性變形，並被使其等沿軸向(圖中，箭頭B方向)被拔取。 In the case of injection molding in the axial stretching mode, when the crown holder 30 is pulled out from the inside of the mold, the mold relatively moves toward the axial direction of the crown holder 30. The spherical mold 40 in which the inner shape of the concave portion 33 is formed is elastically deformed in the circumferential direction (in the direction of the arrow A in the drawing) by the pair of claw portions 36 formed at the tip end of the column portion 32 and facing each other toward the notch portion 34. It is pulled out in the axial direction (in the direction of the arrow B in the figure).
此處，球狀模具40之球徑尺寸X(凹孔部33之球徑尺寸)與相鄰之柱部32中之對向之爪部36之距離Y(爪部末端開口尺寸)之差(X-Y)係稱為所謂強制拔出量之值。又，該強制拔出量(X-Y)係為防止滾珠自凹孔部33脫落而設定為適當量。若強制拔出量(X-Y)過大，則爪部36會超出彈性變形界限，於脫模時會造成爪部36破損，或產生過大之塑性變形，而影響冠型保持器30之功能。若強制拔出量(X-Y)過小，則會導致滾珠3自凹孔部33脫落。因此，強制拔出量(X-Y)應基於該等之相反之功能，而設定為Y/X=0.75~0.95之範圍。 Here, the difference between the spherical diameter size X of the spherical mold 40 (the spherical diameter size of the concave hole portion 33) and the distance Y (the claw end opening size) of the opposing claw portion 36 in the adjacent column portion 32 ( XY) is called the value of the so-called forced pull-out amount. Moreover, this forced pull-out amount (X-Y) is set to an appropriate amount to prevent the balls from falling off from the recessed hole portion 33. If the forced pull-out amount (X-Y) is too large, the claw portion 36 will exceed the elastic deformation limit, and the claw portion 36 may be broken or excessively deformed during the demolding, thereby affecting the function of the crown holder 30. If the forced pull-out amount (X-Y) is too small, the balls 3 will fall off from the recessed portions 33. Therefore, the forced pull-out amount (X-Y) should be set to the range of Y/X=0.75~0.95 based on the opposite function.
於通常之深槽滾珠軸承所使用之冠型保持器之情形時，若將強制拔出量設定為上述範圍內之適當值，則不會於爪部產生如上述般之問題。但，於本發明所使用之冠型保持器30中，根據用途特有之軸承 內部設計規格，柱部32之壁厚較薄。因此，於脫模時，爪部36會因球狀模具40而產生上述彈性變形，並與柱部32前端之對向之一對爪部36彼此接觸，且以相互抵碰之方式接觸。若該抵碰量超過某值，則會自彈性變形進入塑性變形，而導致產生爪部36破損或龜裂之不良。 In the case of a crown type retainer used in a conventional deep groove ball bearing, if the forced pull-out amount is set to an appropriate value within the above range, the above problem does not occur in the claw portion. However, in the crown type holder 30 used in the present invention, the bearing unique to the use is used. Internal design specifications, the wall thickness of the column portion 32 is thin. Therefore, at the time of demolding, the claw portion 36 is elastically deformed by the spherical mold 40, and the pair of claw portions 36 which are opposed to the tip end of the column portion 32 are in contact with each other and are in contact with each other. If the amount of the impact exceeds a certain value, the plastic deformation is caused by the elastic deformation, and the claw portion 36 is broken or cracked.
本發明係預判該不良，並經過各種設計探討及驗證結果，而提出不會產生上述不良之以下規格者。亦即，以使柱部32之圓周方向最小壁厚M與爪部36之圓周方向寬度N及滾珠節圓周長πdm之關係滿足-3.5×10-3≦(M-2N)/πdm<0之方式進行設定。此處，如圖6所示，所謂柱部32之圓周方向最小壁厚M，意指除了供形成爪部36或缺口部34之位置以外之柱部32之圓周方向壁厚之最小值。 The present invention prejudges the defect, and after various design discussions and verification results, proposes the following specifications that do not cause the above-mentioned defects. That is, the relationship between the minimum wall thickness M in the circumferential direction of the column portion 32 and the circumferential width N of the claw portion 36 and the circumferential length πdm of the ball joint satisfies -3.5 × 10 -3 ≦ (M - 2N) / πdm < 0 The way to set. Here, as shown in FIG. 6, the minimum wall thickness M in the circumferential direction of the column portion 32 means the minimum value of the circumferential wall thickness of the column portion 32 except for the position at which the claw portion 36 or the notch portion 34 is formed.
假定，設為-3.5×10-3>(M-2N)/πdm，則脫模時會於爪部36產生危及冠型保持器30之功能之龜裂或缺陷。又，若設為(M-2N)/πdm≧0，則柱部32前端對向之一對爪部36之間雖不會產生壓縮干涉，但因相鄰之凹孔部33間之距離增大，而導致滾珠節圓上所配置之滾珠數量Z減少，故造成載荷負荷能力及剛性降低。另，深槽滾珠軸承等因軸承組裝方法之限制而使滾珠數量受到限制，故(M-2N)之值必須小於0。 It is assumed that, when it is set to -3.5 × 10 -3 > (M - 2N) / πdm, cracks or defects which endanger the function of the crown holder 30 are generated in the claw portion 36 at the time of demolding. Further, when (M-2N) / πdm ≧ 0, the front end of the column portion 32 does not undergo compression interference between the pair of claw portions 36, but the distance between the adjacent concave portions 33 increases. Large, resulting in a reduction in the number of balls Z disposed on the ball circle, resulting in reduced load carrying capacity and rigidity. In addition, deep groove ball bearings and the like are limited by the assembly method of the bearing, so the value of (M-2N) must be less than zero.
又，爪部36之圓周方向寬度N越小，則越容易滿足-3.5×10-3≦(M-2N)/πdm<0，但，若其極小，則因射出成型時，樹脂難以向爪部36前端流動，而成為成型不良。又，因脫模時之強制拔出，會於爪部36之前端部產生龜裂，或造成爪部36之剛性降低而產生滾珠3之脫落。根據本發明截至目前為止之過程中之各種驗證結果，判明爪部36之圓周方向寬度N期望為0.2mm以上。 Further, the smaller the circumferential width N of the claw portion 36 is, the easier it is to satisfy -3.5 × 10 -3 ≦ (M - 2N) / πdm < 0. However, if it is extremely small, the resin is difficult to be applied to the claw during injection molding. The front end of the portion 36 flows and becomes defective in molding. Further, due to the forced pulling out at the time of demolding, cracks may occur at the front end portion of the claw portion 36, or the rigidity of the claw portion 36 may be lowered to cause the ball 3 to fall off. According to various verification results in the process up to the present invention, it is determined that the circumferential direction width N of the claw portion 36 is desirably 0.2 mm or more.
本實施形態之冠型保持器30之構成尤其於添加有如上述般之強化材之樹脂材料於射出成型時樹脂流動性容易變差，且成型時難以進行強制拔出之條件下，更可發揮其效果。 In particular, the resin-type material of the reinforced material of the present embodiment is more likely to exhibit poor fluidity during injection molding at the time of injection molding, and it is difficult to perform forced extraction at the time of molding. effect.
另，如圖22所示之包含滾珠103、外環110、內環120及保持器130 之先前型深槽滾珠軸承100之情形時，如圖23及圖24所示，保持器130係設為如下之冠型保持器，即具有大致圓環狀之環部131、自環部131以特定間隔突出於軸向之複數個柱部132、及形成於相鄰之柱部132之間之複數個凹孔部133。 In addition, as shown in FIG. 22, the ball 103, the outer ring 110, the inner ring 120, and the holder 130 are included. In the case of the former deep groove ball bearing 100, as shown in FIGS. 23 and 24, the retainer 130 is a crown type retainer having a substantially annular ring portion 131 and a self-loop portion 131. The plurality of column portions 132 protruding in the axial direction and the plurality of concave holes 133 formed between the adjacent column portions 132 are formed at a specific interval.
於此種先前型深槽滾珠軸承100中，因其使用用途為馬達用等，鑒於相較而言為輕載荷，或深槽滾珠軸承100之組裝方面之限制，與本實施形態之滾珠螺桿支撐用斜角滾珠軸承1相比，滾珠數量減少至1/2~1/3左右。因此，保持器130之凹孔部133之圓周方向之間距擴大，柱部132之一對角部135之間，與本實施形態之柱部32之一對角部35之間相比更遠離。因此，於模具之強制拔出時，為了使柱部132之前端部容易變形之目的，可於一對角部135之間設置凹部136。又，凹部136之底面137可成為於圓周方向延伸之平面。而且，於凹部136之底面137，設置用以脫模之銷，對凹孔部133之模具，藉由將銷朝軸向推出可進行強制拔出之脫模。 In such a prior type deep groove ball bearing 100, since it is used for a motor or the like, in view of a light load or a limitation of assembly of the deep groove ball bearing 100, the ball screw support of the present embodiment is used. Compared with the bevel ball bearing 1, the number of balls is reduced to about 1/2 to 1/3. Therefore, the distance between the circumferential directions of the recessed portions 133 of the retainer 130 is enlarged, and the distance between one of the diagonal portions 135 of the column portion 132 is further away from between the diagonal portions 35 of one of the pillar portions 32 of the present embodiment. Therefore, when the mold is forcibly pulled out, the concave portion 136 may be provided between the pair of corner portions 135 for the purpose of easily deforming the front end portion of the column portion 132. Further, the bottom surface 137 of the concave portion 136 may be a plane extending in the circumferential direction. Further, a pin for demolding is provided on the bottom surface 137 of the recessed portion 136, and the mold for the recessed hole portion 133 is released by forcibly pulling out the pin in the axial direction.
如此，於先前型深槽滾珠軸承100中，於模具之強制拔模時，保持器130受損傷之機率較少，而並未發現本發明之問題。 Thus, in the conventional deep groove ball bearing 100, the probability of damage to the retainer 130 during the forced drafting of the mold is small, and the problem of the present invention has not been found.
如圖10~13所示，第2實施形態之冠型保持器30並未設置如第1實施形態般之第1、第2及第3直線形狀部33b、33c、33g(參照圖7)，且將形成凹孔部33之柱部32之自周向觀察時之側面設為任意之半徑r之圓狀。 As shown in FIGS. 10 to 13, the crown holder 30 of the second embodiment is not provided with the first, second, and third linear portions 33b, 33c, and 33g (see FIG. 7) as in the first embodiment. Further, the side surface of the column portion 32 forming the recessed portion 33 when viewed from the circumferential direction is formed into a circular shape having an arbitrary radius r.
即便為此種構成，藉由與第1實施形態同樣，以滿足2.5×10-3≦L/πdm≦13×10-3，且-3.5×10-3≦(M-2N)/πdm<0之方式進行設定，亦可起到與第1實施形態相同之效果。 Even in such a configuration, as in the first embodiment, 2.5 × 10 -3 ≦L / πdm ≦ 13 × 10 -3 is satisfied, and -3.5 × 10 -3 ≦ (M - 2N) / πdm < 0 The setting of the mode can also achieve the same effect as that of the first embodiment.
凹孔部33之球面中心位置並非限定於如圖1及圖10所示之第1及 第2實施形態般，相較於環部31之最外徑部m1與最內徑部m2之徑向中間位置m，偏移至徑向內側之構成。亦即，如圖14~圖16所示之第3實施形態，或圖17及圖18所示之第4實施形態般，亦可為凹孔部33之球面中心位置相較於環部31之最外徑部m1與最內徑部m2之徑向中間位置m偏移至徑向外側之構成。 The spherical center position of the recessed portion 33 is not limited to the first one as shown in FIGS. 1 and 10 . In the second embodiment, the radially outer position m of the outermost diameter portion m1 and the innermost diameter portion m2 of the ring portion 31 is shifted to the radially inner side. That is, as shown in the third embodiment shown in FIGS. 14 to 16 or the fourth embodiment shown in FIGS. 17 and 18, the spherical center position of the recessed portion 33 may be compared with the ring portion 31. The radially outer position m of the outermost diameter portion m1 and the innermost diameter portion m2 is shifted to the radially outer side.
亦即，可為將環部31配置於外環槽肩部12與內環埋頭孔23之間，將柱部32配置於外環10及內環20之軌道面11、21間，使環部31接觸柱部32之徑向內側端部之構造。 That is, the ring portion 31 may be disposed between the outer ring groove shoulder portion 12 and the inner ring countersunk hole 23, and the column portion 32 may be disposed between the outer ring 10 and the inner ring 20 between the track faces 11, 21 to make the ring portion 31 is configured to contact the radially inner end portion of the column portion 32.
另，於圖14~18所示之例中，凹孔部33之球面中心位置較環部31之最外徑部m1(徑向外側面31b)偏移至徑向外側。即便於該情形時，柱部32之前端亦由於於周向中間設有缺口部34，且分為兩支，故於以射出成型製造保持器30時，可防止因形成凹孔部33之模具構件之強制拔出所引起之柱部32之凹孔部33側之角部35之破損。 Further, in the example shown in Figs. 14 to 18, the spherical center position of the recessed portion 33 is shifted to the radially outer side from the outermost diameter portion m1 (the radially outer side surface 31b) of the ring portion 31. In other words, in the case where the front end of the column portion 32 is provided with the notch portion 34 in the circumferential direction and is divided into two, the mold for forming the recessed hole portion 33 can be prevented when the holder 30 is manufactured by injection molding. The corner portion 35 on the side of the recessed portion 33 of the column portion 32 caused by the forced extraction of the member is broken.
如圖16所示，於第3實施形態中，形成凹孔部33之柱部32之自周向觀察時之側面係以將連結環部31之徑向外側面(徑向一側面)31b與徑向內側面(徑向另一側面)31a之圓弧33a一部分缺除而形成者。圓弧33a之中心係以P表示，半徑以r表示。 As shown in Fig. 16, in the third embodiment, the side surface of the column portion 32 in which the recessed portion 33 is formed is viewed from the circumferential direction so that the radially outer surface (radial side surface) 31b of the connecting ring portion 31 is A part of the arc 33a of the radially inner side surface (the other side of the radial direction) 31a is missing and formed. The center of the arc 33a is denoted by P, and the radius is denoted by r.
更具體而言，柱部32之自周向觀察時之側面包含將圓弧33a之徑向外側端部(徑向一側端部)缺除且設為於軸向延伸而形成之第1直線形狀部33b。第1直線形狀部33b係配置於較圓之中心P更靠正面側(相反負荷側，圖16中左側)。又，第1直線形狀部33b與滾珠3之中心Oi(凹孔部33之球面中心)於軸向重疊。 More specifically, the side surface of the column portion 32 when viewed from the circumferential direction includes a first straight line formed by extending the radially outer end portion (the end portion on the radial side) of the circular arc 33a and extending in the axial direction. Shape portion 33b. The first linear shape portion 33b is disposed on the front side (the opposite load side, the left side in FIG. 16) on the center P of the circle. Further, the first linear portion 33b and the center Oi of the ball 3 (the spherical center of the concave portion 33) overlap in the axial direction.
進而，柱部32之自周向觀察時之側面包含第2直線形狀部33c，其係以將圓弧33a中連結第1直線形狀部33b之背面側(負荷側，圖16中右側)之端部，與環部31之徑向外側面31b之正面側之端部之部分缺除而形成。因此，第2直線形狀部33c係設為隨著朝向背面側(環部31側)， 而朝向徑向內側之直線形狀。 Further, the side surface of the column portion 32 when viewed from the circumferential direction includes the second linear portion 33c that connects the end of the back surface side (load side, right side in FIG. 16) of the first linear portion 33b to the circular arc 33a. The portion is formed to be absent from a portion of the end portion on the front side of the radially outer side surface 31b of the ring portion 31. Therefore, the second linear shape portion 33c is formed toward the back side (the side of the ring portion 31). And a linear shape toward the radially inner side.
又，柱部32之自周向觀察時之側面包含第3直線形狀部33g，其係以將圓弧33a之徑向內側端部(徑向另一側端部)缺除並設為於軸向延伸而形成。第3直線形狀部33g與環部31之徑向內側面31a形成於同一平面上，且與該徑向內側面31a無階差地連接。 Further, the side surface of the column portion 32 when viewed from the circumferential direction includes the third linear portion 33g which is defined by the radially inner end portion (the other end portion in the radial direction) of the circular arc 33a. Formed to extend. The third linear portion 33g is formed on the same plane as the radially inner side surface 31a of the ring portion 31, and is connected to the radially inner side surface 31a without a step.
如此，柱部32之自周向觀察時之側面成為將第3直線形狀部33g、圓弧33a、第1直線形狀部33b、及第2直線形狀部33c連接而成之形狀。 In this manner, the side surface of the column portion 32 when viewed from the circumferential direction has a shape in which the third linear portion 33g, the circular arc 33a, the first linear portion 33b, and the second linear portion 33c are connected.
又，如圖17所示，於第4實施形態中，形成凹孔部33之柱部32之自周向觀察時之側面被設為任意之半徑r之圓狀。 Further, as shown in Fig. 17, in the fourth embodiment, the side surface of the column portion 32 in which the recessed portion 33 is formed is viewed from the circumferential direction as a circular shape having an arbitrary radius r.
即便於如此構成之情形時，藉由與上述實施形態同樣，以滿足2.5×10-3≦L/πdm≦13×10-3，且-3.5×10-3≦(M-2N)/πdm<0之方式進行設定，亦可起到與上述實施形態相同之效果。 In other words, in the case of such a configuration, it is satisfied that 2.5 × 10 -3 ≦L / πdm ≦ 13 × 10 -3 and -3.5 × 10 -3 ≦ (M - 2N) / πdm < The setting of 0 is the same as that of the above embodiment.
如圖19所示，凹孔部33之球面中心位置與環部31之最外徑部m1、最內徑部m2之徑向中間位置m亦可於徑向一致。於圖示之例中，外環10之內周面具有：外環槽肩部12，其凸設於較軌道面11更背面側(負荷側，圖19中右側)；及外環埋頭孔13，其凹設於較軌道面11更正面側(相反負荷側，圖19中左側)。於內環20之外周面，較軌道面21更正面側及更背面側，凸設有內環槽肩部22。而且，將環部31配置於外環槽肩部12與內環槽肩部22之間，將柱部32配置於外環10及內環20之軌道面11、21之間，將環部31連接至柱部32之壁厚之徑向中心部。另，形成凹孔部33之柱部32之自周向觀察時之側面係任意之半徑r之圓狀。 As shown in Fig. 19, the spherical center position of the recessed portion 33 and the radially intermediate position m of the outermost diameter portion m1 and the innermost diameter portion m2 of the ring portion 31 may coincide with each other in the radial direction. In the illustrated example, the inner circumferential surface of the outer ring 10 has an outer ring groove shoulder portion 12 which is convexly disposed on the back side of the track surface 11 (load side, right side in FIG. 19); and outer ring countersunk hole 13 It is recessed on the more front side than the track surface 11 (opposite to the load side, the left side in FIG. 19). On the outer circumferential surface of the inner ring 20, the inner ring groove shoulder portion 22 is convexly protruded from the front surface side and the rear surface side of the rail surface 21. Further, the ring portion 31 is disposed between the outer ring groove shoulder portion 12 and the inner ring groove shoulder portion 22, and the column portion 32 is disposed between the outer ring 10 and the track faces 11, 21 of the inner ring 20, and the ring portion 31 is disposed. It is connected to the radial center portion of the wall thickness of the column portion 32. Further, the side surface of the column portion 32 forming the concave hole portion 33 is circularly formed with an arbitrary radius r when viewed from the circumferential direction.
即便於如此構成之情形時，藉由與上述實施形態同樣，以滿足2.5×10-3≦L/πdm≦13×10-3，且-3.5×10-3≦(M-2N)/πdm<0之方式進行 設定，亦可起到與上述實施形態相同之效果。 In other words, in the case of such a configuration, it is satisfied that 2.5 × 10 -3 ≦L / πdm ≦ 13 × 10 -3 and -3.5 × 10 -3 ≦ (M - 2N) / πdm < The setting of 0 is the same as that of the above embodiment.
進而，凹孔部33之球面中心位置(滾珠中心Oi)係自斜角滾珠軸承1之軸向中心於軸向(正面側)偏移。亦即，以若將供配置環部31之背面側(圖19中右側)之斜角滾珠軸承1之端面4至凹孔部33之球面中心位置之軸向距離設為X，將正面側(圖19中左側)之斜角滾珠軸承1之端面5至凹孔部33之球面中心位置之軸向距離設為Y，則成為X>Y之方式進行設定。藉此，可擴大背面側之斜角滾珠軸承1之端面4與滾珠3之表面之間之軸向空間。藉此，可增大環部31之軸向尺寸，提高環部31之圓環強度。 Further, the spherical center position (ball center Oi) of the recessed hole portion 33 is shifted from the axial center of the oblique-angled ball bearing 1 in the axial direction (front side). In other words, when the axial distance between the end surface 4 of the bevel ball bearing 1 on the back side (the right side in FIG. 19) of the arrangement ring portion 31 and the spherical center position of the recessed portion 33 is X, the front side (the front side) In the left side of the bevel ball bearing 1 of FIG. 19, the axial distance from the center position of the spherical surface of the recessed hole 33 is set to Y, and it is set so that X>Y. Thereby, the axial space between the end face 4 of the bevel ball bearing 1 on the back side and the surface of the ball 3 can be enlarged. Thereby, the axial dimension of the ring portion 31 can be increased, and the ring strength of the ring portion 31 can be increased.
另，若環部31之強度方面不存在問題，則如圖20所示，亦可為凹孔部33之球面中心位置(滾珠中心Oi)與斜角滾珠軸承1之軸向中心一致之構成。於該情形時，上述軸向距離X及Y之關係為X=Y。 Further, if there is no problem in the strength of the ring portion 31, as shown in FIG. 20, the spherical center position (ball center Oi) of the recessed hole portion 33 may be aligned with the axial center of the bevel ball bearing 1. In this case, the relationship between the axial distances X and Y is X = Y.
如圖21所示，亦可為凹孔部33之球面中心位置與環部31之最外徑部m1、最內徑部m2之徑向中間位置m於徑向一致之構成。於圖示之例中，外環10之內周面具有：外環槽肩部12，其凸設於較軌道面11更靠軸向內側(負荷側)；及外環密封槽15，其凹設於較軌道面11更靠軸向外側(相反負荷側)。內環20之外周面具有：內環槽肩部22，其凸設於較軌道面21更靠軸向內側；及內環密封槽25，其凹設於較軌道面21更靠軸向外側。而且，將環部31配置於外環槽肩部12與內環槽肩部22之間，將柱部32配置於外環10及內環20之軌道面11、21之間，將環部31連接至柱部32之壁厚之徑向中心部。另，形成凹孔部33之柱部32之自周向觀察時之側面係任意之半徑r之圓狀。進而，於外環密封槽15固定有密封構件50。該密封構件50與內環密封槽25介隔微小之間隙而對向，以防止異物混入至軸承內部。另，密封構件50並非限定於非接觸密封，亦可為接觸密封。 As shown in FIG. 21, the spherical center position of the concave hole portion 33 may be configured to coincide with the radial intermediate position m of the annular portion 31 and the radially intermediate position m of the innermost diameter portion m2 in the radial direction. In the illustrated example, the inner circumferential surface of the outer ring 10 has an outer ring groove shoulder portion 12 which is convexly disposed on the inner side (load side) of the track surface 11; and an outer ring seal groove 15, which is concave. It is disposed on the outer side of the rail surface 11 (on the opposite side of the load). The outer circumferential surface of the inner ring 20 has an inner ring groove shoulder portion 22 which is protruded from the inner side of the rail surface 21 and an inner ring seal groove 25 which is recessed on the outer side of the rail surface 21 in the axial direction. Further, the ring portion 31 is disposed between the outer ring groove shoulder portion 12 and the inner ring groove shoulder portion 22, and the column portion 32 is disposed between the outer ring 10 and the track faces 11, 21 of the inner ring 20, and the ring portion 31 is disposed. It is connected to the radial center portion of the wall thickness of the column portion 32. Further, the side surface of the column portion 32 forming the concave hole portion 33 is circularly formed with an arbitrary radius r when viewed from the circumferential direction. Further, a sealing member 50 is fixed to the outer ring seal groove 15. The sealing member 50 is opposed to the inner ring seal groove 25 with a slight gap therebetween to prevent foreign matter from entering the inside of the bearing. Further, the sealing member 50 is not limited to the non-contact seal, and may be a contact seal.
如此，藉由相對於凹孔部33於軸向內側配置環部31，於軸向外側配置密封構件50，可將斜角滾珠軸承1小型化。如圖21所示，此種斜角滾珠軸承1可藉由背面組合而使用。 By arranging the ring portion 31 on the inner side in the axial direction with respect to the recessed hole portion 33, the sealing member 50 is disposed on the outer side in the axial direction, and the bevel ball bearing 1 can be downsized. As shown in Fig. 21, such a bevel ball bearing 1 can be used by a combination of the back faces.
即便於如此構成之情形時，藉由與上述實施形態同樣，以滿足2.5×10-3≦L/πdm≦13×10-3，且-3.5×10-3≦(M-2N)/πdm<0之方式進行設定，亦可起到與上述實施形態相同之效果。 In other words, in the case of such a configuration, it is satisfied that 2.5 × 10 -3 ≦L / πdm ≦ 13 × 10 -3 and -3.5 × 10 -3 ≦ (M - 2N) / πdm < The setting of 0 is the same as that of the above embodiment.
另，本實施形態亦與第5實施形態同樣，凹孔部33之球面中心位置(滾珠中心Oi)係自斜角滾珠軸承1之軸向中心於軸向外側(正面側)偏移。亦即，以軸向距離X及Y之關係成為X>Y之方式進行設定。藉此，可擴大背面側(圖21中軸向內側)之斜角滾珠軸承1之端面4與滾珠3之表面之間之軸向空間。藉此，可增大環部31之軸向尺寸，提高環部31之圓環強度。 In the present embodiment, as in the fifth embodiment, the spherical center position (ball center Oi) of the recessed portion 33 is shifted from the axial center of the oblique-angle ball bearing 1 to the axially outer side (front side). That is, the relationship is set such that the relationship between the axial distances X and Y is X>Y. Thereby, the axial space between the end surface 4 of the bevel ball bearing 1 on the back side (the axial inner side in FIG. 21) and the surface of the ball 3 can be enlarged. Thereby, the axial dimension of the ring portion 31 can be increased, and the ring strength of the ring portion 31 can be increased.
另，若環部31之強度方面不存在問題，則亦可為凹孔部33之球面中心位置(滾珠中心Oi)與斜角滾珠軸承1之軸向中心一致之構成。於該情形時，軸向距離X及Y之關係為X=Y。 Further, if there is no problem in the strength of the ring portion 31, the spherical center position (ball center Oi) of the recessed hole portion 33 may be configured to coincide with the axial center of the bevel ball bearing 1. In this case, the relationship between the axial distances X and Y is X = Y.
其次，使(M-2N)/πdm如表1那樣變化，藉由以軸向拉伸方式之射出成型製造冠型保持器30，對柱部32之一對爪部36之損傷狀態進行實驗。另，於實施例1、2及比較例1中，將除(M-2N)/πdm以外之參數如以下所示般設為相同。 Next, (M-2N)/πdm was changed as shown in Table 1, and the crown retainer 30 was produced by injection molding in the axial stretching manner, and the damage state of one of the column portions 32 to the claw portion 36 was tested. Further, in Examples 1 and 2 and Comparative Example 1, parameters other than (M-2N)/πdm were set to be the same as described below.
軸承內徑： 45mm，軸承外徑： 100mm，滾珠節圓直徑dm： 75mm，滾珠直徑Dw：10.319mm，滾珠數量Z：21個，接觸角α：60°，冠型保持器材質：聚醯胺樹脂(含20wt.%之玻璃纖維強化材)，L/πdm：3.6×10-3 Bearing inner diameter: 45mm, bearing outer diameter: 100mm, ball pitch diameter dm: 75mm, ball diameter Dw: 10.319mm, number of balls Z: 21, contact angle α: 60°, crown retainer material: polyamide resin (20wt.% glass fiber reinforced material), L/πdm: 3.6 ×10 -3
[表1]
隨著(M-2N)/πdm增大，對爪部36施加更大之負荷，尤其於-3.5×10-3>(M-2N)/πdm之比較例中，於爪部36產生龜裂。此係因為於模具之強制拔出時，於柱部32前端對向之一對爪部36之間產生壓縮干涉之故。根據該結果而明瞭的是，柱部32之圓周方向最小壁厚M與爪部36之圓周方向寬度N及滾珠節圓周長πdm之關係較佳滿足-3.5×10-3≦(M-2N)/πdm<0。 As (M-2N)/πdm increases, a larger load is applied to the claw portion 36, particularly in the comparative example of -3.5 × 10 -3 > (M - 2N) / πdm, cracking occurs in the claw portion 36 . This is because when the mold is forcibly pulled out, compression interference occurs between the pair of claw portions 36 at the front end of the column portion 32. From this result, it is understood that the relationship between the minimum wall thickness M in the circumferential direction of the column portion 32 and the circumferential width N of the claw portion 36 and the circumferential length πdm of the ball joint is preferably -3.5 × 10 -3 ≦ (M - 2 N) /πdm<0.
其次，對變更斜角滾珠軸承1之複數個參數之各實施例進行說明。 Next, each embodiment in which a plurality of parameters of the bevel ball bearing 1 are changed will be described.
於本實施例中，對第1實施形態之斜角滾珠軸承1，將軸承內徑設為 30mm，將軸承外徑設為 62mm，L/πdm=5.0×10-3，(M-2N)/πdm=-1.4×10-3。 In the present embodiment, the bevel ball bearing 1 of the first embodiment has the bearing inner diameter set to 30mm, set the bearing outer diameter to 62 mm, L/πdm = 5.0 × 10 -3 , (M-2N) / πdm = -1.4 × 10 -3 .
藉由如此設定各參數，確認可起到與上述實施形態相同之效果。 By setting each parameter in this way, it is confirmed that the same effects as those of the above embodiment can be obtained.
於本實施例中，對第2實施形態之斜角滾珠軸承1，將軸承內徑設為 20mm，將軸承外徑設為 47mm，L/πdm=11.4×10-3，(M-2N)/πdm=-3.0×10-3。 In the present embodiment, the bevel ball bearing 1 of the second embodiment has the bearing inner diameter set to 20mm, set the bearing outer diameter to 47 mm, L/πdm = 11.4 × 10 -3 , (M-2N) / πdm = -3.0 × 10 -3 .
藉由如此設定各參數，確認可起到與上述實施形態相同之效果。 By setting each parameter in this way, it is confirmed that the same effects as those of the above embodiment can be obtained.
於本實施例中，對第3及第4實施形態之斜角滾珠軸承1，將軸承內徑設為 50mm，將軸承外徑設為 100mm，L/πdm=-3.5×10-3，(M-2N)/πdm=-0.7×10-3。 In the present embodiment, the bevel ball bearing 1 of the third and fourth embodiments has the bearing inner diameter set to 50mm, set the bearing outer diameter to 100 mm, L/πdm = -3.5 × 10 -3 , (M-2N) / πdm = -0.7 × 10 -3 .
藉由如此設定各參數，確認可起到與上述實施形態相同之效果。 By setting each parameter in this way, it is confirmed that the same effects as those of the above embodiment can be obtained.
於本實施例中，對於第5實施形態之斜角滾珠軸承1，將軸承內徑設為 20mm，將軸承外徑設為 47mm，L/πdm=11.4×10-3，(M-2N)/πdm=-3.0×10-3。 In the present embodiment, the bevel ball bearing 1 of the fifth embodiment has the bearing inner diameter set to 20mm, set the bearing outer diameter to 47 mm, L/πdm = 11.4 × 10 -3 , (M-2N) / πdm = -3.0 × 10 -3 .
藉由如此設定各參數，確認可起到與上述實施形態相同之效果。 By setting each parameter in this way, it is confirmed that the same effects as those of the above embodiment can be obtained.
於本實施例中，對於第6實施形態之斜角滾珠軸承1，將軸承內徑設為 130mm，將軸承外徑設為 165mm，L/πdm=2.7×10-3，(M-2N)/πdm=-0.6×10-3。 In the present embodiment, the bevel ball bearing 1 of the sixth embodiment has the bearing inner diameter set to 130mm, set the bearing outer diameter to 165 mm, L/πdm = 2.7 × 10 -3 , (M - 2N) / πdm = -0.6 × 10 -3 .
藉由如此設定各參數，確認可起到與上述實施形態相同之效果。 By setting each parameter in this way, it is confirmed that the same effects as those of the above embodiment can be obtained.
又，本發明係並非限定於上述實施形態者，而可進行適當變更、改良等。 Further, the present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, and the like.
本申請案係基於2014年7月2日申請之日本專利申請案第2014-136858及2015年6月10日申請之日本專利申請案第2015-117336者，該內容係以引用之方式併入此。 The present application is based on Japanese Patent Application No. 2014-136858, filed on Jul. 2, 2014, and the entire contents of .
32‧‧‧柱部 32‧‧‧ Column Department
33‧‧‧凹孔部 33‧‧‧ recessed hole
34‧‧‧缺口部 34‧‧‧Gap section
35‧‧‧角部 35‧‧‧ corner
36‧‧‧爪部 36‧‧‧ claws
M‧‧‧圓周方向最小壁厚 M‧‧‧Minimum wall thickness
N‧‧‧圓周方同最小壁厚 N‧‧‧Circular side with minimum wall thickness
X‧‧‧球徑尺寸(軸向距離) X‧‧‧ ball diameter size (axial distance)
Y‧‧‧距離(軸向距離) Y‧‧‧ distance (axial distance)
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014136858 | 2014-07-02 | ||
| JP2015117336A JP2016027279A (en) | 2014-07-02 | 2015-06-10 | Crown retainer and angular contact ball bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201608143A TW201608143A (en) | 2016-03-01 |
| TWI568943B true TWI568943B (en) | 2017-02-01 |
Family
ID=55019217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW104121539A TWI568943B (en) | 2014-07-02 | 2015-07-02 | Crown retainer and bevel ball bearing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2016027279A (en) |
| KR (1) | KR20170015372A (en) |
| CN (1) | CN106662152A (en) |
| TW (1) | TWI568943B (en) |
| WO (1) | WO2016002681A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3744992B1 (en) * | 2018-01-26 | 2022-01-26 | Nsk Ltd. | Angular ball bearing |
| JP2021139410A (en) * | 2020-03-03 | 2021-09-16 | 日本精工株式会社 | Crown-type cage for ball bearing and ball bearing |
| CN114321184A (en) * | 2020-10-10 | 2022-04-12 | 斯凯孚(中国)有限公司 | Bearing cage and use thereof |
| CN113294441A (en) * | 2021-05-10 | 2021-08-24 | 洛阳轴承研究所有限公司 | Injection molding retainer and bearing using same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557517A (en) * | 1978-10-20 | 1980-04-28 | Draco Ab | Therapy and pharmacologic medicine for occulusive respiratory tract disease and heart disease |
| US5575570A (en) * | 1994-07-08 | 1996-11-19 | Nsk Ltd. | Cage for rolling bearing |
| US5941704A (en) * | 1995-02-20 | 1999-08-24 | Koyo Seiko Co., Ltd. | Crown cage for ball bearing and dental hand piece including the same |
| JP2007333187A (en) * | 2006-06-19 | 2007-12-27 | Ntn Corp | Resin made crown cage for ball bearing, and ball bearing with the cage |
| US20080187261A1 (en) * | 2007-01-29 | 2008-08-07 | Nsk Ltd. | Ball bearing and supporting construction |
| CN203477079U (en) * | 2012-09-27 | 2014-03-12 | 日本精工株式会社 | Crown cage and ball bearing |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596262Y2 (en) * | 1978-10-16 | 1984-02-27 | 株式会社不二越 | Resin crown retainer |
| JPH0349417A (en) | 1989-07-18 | 1991-03-04 | Nec Corp | Semiconductor integrated circuit |
| NL1001860C2 (en) * | 1995-12-08 | 1997-06-10 | Skf Ind Trading & Dev | Rolling bearing cage. |
| JP2000104742A (en) | 1998-09-29 | 2000-04-11 | Ntn Corp | Rolling bearing for supporting ball screw |
| JP2002295479A (en) * | 2001-03-29 | 2002-10-09 | Koyo Seiko Co Ltd | Cage for bearing |
| JP4055938B2 (en) * | 2002-04-18 | 2008-03-05 | ミネベア株式会社 | Radial ball bearing retainer |
| EP1367277B1 (en) * | 2002-05-30 | 2008-06-25 | Minebea Co., Ltd. | Retainer with rotationally symmetric pockets |
| JP2005061508A (en) | 2003-08-11 | 2005-03-10 | Nsk Ltd | Angular contact ball bearing |
| JP2006017180A (en) * | 2004-06-30 | 2006-01-19 | Koyo Seiko Co Ltd | Crown retainer made of synthetic resin |
| DE602005021247D1 (en) * | 2004-12-07 | 2010-06-24 | Jtekt Corp | HOLDER FOR BALL BEARINGS AND THIS USING BALL BEARING |
-
2015
- 2015-06-10 JP JP2015117336A patent/JP2016027279A/en active Pending
- 2015-06-26 WO PCT/JP2015/068590 patent/WO2016002681A1/en active Application Filing
- 2015-06-26 CN CN201580036047.6A patent/CN106662152A/en active Pending
- 2015-06-26 KR KR1020167036852A patent/KR20170015372A/en not_active Application Discontinuation
- 2015-07-02 TW TW104121539A patent/TWI568943B/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557517A (en) * | 1978-10-20 | 1980-04-28 | Draco Ab | Therapy and pharmacologic medicine for occulusive respiratory tract disease and heart disease |
| US5575570A (en) * | 1994-07-08 | 1996-11-19 | Nsk Ltd. | Cage for rolling bearing |
| US5941704A (en) * | 1995-02-20 | 1999-08-24 | Koyo Seiko Co., Ltd. | Crown cage for ball bearing and dental hand piece including the same |
| JP2007333187A (en) * | 2006-06-19 | 2007-12-27 | Ntn Corp | Resin made crown cage for ball bearing, and ball bearing with the cage |
| US20080187261A1 (en) * | 2007-01-29 | 2008-08-07 | Nsk Ltd. | Ball bearing and supporting construction |
| CN203477079U (en) * | 2012-09-27 | 2014-03-12 | 日本精工株式会社 | Crown cage and ball bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016027279A (en) | 2016-02-18 |
| KR20170015372A (en) | 2017-02-08 |
| WO2016002681A1 (en) | 2016-01-07 |
| TW201608143A (en) | 2016-03-01 |
| CN106662152A (en) | 2017-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |