JP2013133881A - Cylindrical-roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing costs by preventing inner rings from separating from each other by a simple structure in a double-row cylindrical-roller bearing having the double-row inner rings integrated with an outer ring.SOLUTION: The double-row cylindrical-roller bearing 11 includes the inner ring 13 having a raceway face 13a of cylindrical rollers 12, the inner ring 15 having a raceway face 15a of cylindrical rollers 14, and the integrated type outer ring 16 having a raceway face 16a of the cylindrical rollers 12 and a raceway face 15b of the cylindrical rollers 14. Fitting grooves 13d and 15d are formed at the circumference of a joining face 13c of the inner ring 13 and at the circumference of a joining face 15c of the inner ring 15. Connecting parts 17 are fit in the grooves 13d and 15d to connect the rings 13 and 15.

Description

  The present invention relates to a double row rolling bearing using cylindrical roller bearings arranged in two rows, and more particularly, to a crane sheave rolling bearing using a plurality of double row cylindrical roller bearings arranged in two rows.

  As shown in FIG. 6, the conventional double-row cylindrical roller bearing for crane sheave includes two rollers 61a and 61b, two inner rings 62a and 62b divided for each roller array, and inner rings 62a and 62b. The inner ring 62a and 62b are separated from each other by an inner ring coupling ring 64 that connects the inner rings 62a and 62b. The outer ring raceway surface 63a, Separating inner rings 62a and 62b by installing retaining rings in fitting grooves formed on both outer sides of 63b (see, for example, Patent Document 1), or by fitting a flange into an annular groove provided on the inner side of inner rings 62a and 62b (For example, refer to Patent Document 2).

JP-A-11-101228 JP 2001-140868 A

  However, conventional double-row cylindrical roller bearings for crane sheaves require processing steps for forming a complex groove for fitting the inner ring coupling ring 64 on the inner diameter surfaces of the inner rings 62a and 62b and press working for incorporating the inner ring coupling ring 64. This increases the manufacturing cost. Further, in Patent Document 1 and Patent Document 2, assembly grooves are provided in which fitting grooves are provided on both outer sides of the outer ring raceway surface and retaining rings are installed, or in which an annular groove is provided on the inner ring to fit a flange. As a result, the manufacturing cost was increased.

  The present invention has been made in view of such problems, and an object of the present invention is to prevent separation of the inner ring by a simple structure in a cylindrical roller bearing in which a plurality of rows of inner rings are integrated by the outer ring. It is to facilitate manufacturing and reduce manufacturing costs.

  In order to achieve the above object, a double row cylindrical roller bearing according to the present invention includes a plurality of inner rings having raceway surfaces of cylindrical rollers and a double row cylindrical roller having an integral outer ring having raceway surfaces of the plurality of cylindrical rollers. A bearing is characterized in that a fitting groove is formed on a joint surface on the circumference of an adjacent inner ring, and a connecting part made of an elastic material is fitted into the fitting groove to connect the adjacent inner rings.

  According to the present invention, in a cylindrical roller bearing in which a plurality of rows of inner rings are integrated by an outer ring, separation of the inner rings can be prevented with a simple structure, and manufacturing can be facilitated and manufacturing cost can be reduced.

The longitudinal cross-sectional view of the double row cylindrical roller bearing which concerns on embodiment of this invention The cross-sectional view explaining the coupling | bonding state of the inner ring | wheel of the double row cylindrical roller bearing which concerns on embodiment of this invention The perspective view of the coupling component of the double row cylindrical roller bearing which concerns on embodiment of this invention Explanatory drawing of the groove | channel and insertion hole which are formed in the inner ring | wheel joint surface of the double row cylindrical roller bearing which concerns on embodiment of this invention The simulation figure explaining the coupling | bonding method of the double row cylindrical roller inner ring which concerns on embodiment of this invention Sectional view of a conventional rolling bearing for crane sheave

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a double row cylindrical roller bearing according to an embodiment of the present invention. As shown in FIG. 1, the double row cylindrical roller bearing 11 is provided on both sides of the raceway surface 15 a of the cylindrical roller 14 and the inner ring 13 on which the collars 13 b and 13 b ′ are formed on both sides of the raceway surface 13 a of the cylindrical roller 12. The inner ring 15 formed with the collars 15b and 15b ′ is provided with an outer ring 16 provided with the raceway surfaces 16a and 16a ′ of the two cylindrical rollers 12 and 14, and the inner ring 15 and the inner ring 13 adjacent to each other. The fitting part 17 made of an elastic material is fitted into the fitting groove 13d formed along the circumference on the surface 13c and the fitting groove 15d formed along the circumference on the joining surface 15c of the inner ring 15 adjacent to the inner ring 13. The inner ring 13 and the inner ring 15 are coupled.

  In addition, grooves 18 are provided at both ends of the outer ring 16 opposite to the joint surface 13c of the inner ring 13 and the joint surface 15c of the inner ring 15, and a shield plate 19 is attached.

  FIG. 2 is a cross-sectional view for explaining the coupling state of the inner rings of the double row cylindrical roller bearing according to the embodiment of the present invention. As shown in FIGS. 1 and 2, the double row cylindrical roller bearing 11 includes a fitting groove 13 d formed on the joining surface 13 c of the inner ring 13 and a fitting groove formed on the joining surface 15 c on the circumference of the inner ring 15. The inner ring 13 and the inner ring 15 are coupled by fitting the coupling component 17 into coupling positions P1, P2, and P3 provided at three positions on the circumference of 15d at equal intervals. An insertion hole 13e or an insertion hole 15e for inserting the coupling component 17 into the circumferential end of one of the coupling positions P1, P2, and P3 of the fitting groove 13d of the inner ring 13 or the fitting groove 15d of the inner ring 15. Is formed.

  FIG. 3 is a perspective view of a coupling component of the double row cylindrical roller bearing according to the embodiment of the present invention. As shown in FIG. 3, the coupling component 17 is composed of an upper portion 17u and a lower portion 17d, which are formed of an elastic material and have a narrow center in the cross section and gradually widen toward both ends, and the fitting groove of the inner ring 13 adjacent in the longitudinal direction. 13d and the fitting groove 15d of the inner ring 15 are formed in a circular arc shape divided in the circumferential direction. When the coupling component 17 is formed using a soft elastic material, the coupling component 17 is formed in a straight shape in the longitudinal direction and is fitted in accordance with the arc shape of the fitting groove 13d of the inner ring 13 and the fitting groove 15d of the inner ring 15. May be included.

  FIG. 4 is an explanatory diagram of grooves and insertion holes formed in the inner ring joint surface of the double row cylindrical roller bearing according to the embodiment of the present invention. As shown in FIGS. 2 and 4, the fitting groove 13d of the inner ring 13 and the fitting groove 15d of the inner ring 15 have the same shape as the upper part 17u or the lower part 17d of the coupling component 17, respectively, on the side of the joining surface 13c and the joining surface 15c. It is formed along the entire circumference of the joint surface 13c of the inner ring 13 and the joint surface 15c of the inner ring 15 so as to gradually become wider as the entrance becomes narrower, and the joint surface 13c of the inner ring 13 or the joint surface 15c of the inner ring 15 is formed. An insertion hole 13e or 15e having a width in the radial direction equal to the width of the end of the connecting component 17 is provided at the end on the circumference of any of the connecting positions P1, P2, and P3.

  FIG. 5 is a simulation diagram for explaining a method of coupling inner rings of cylindrical rollers according to the embodiment of the present invention. As shown in FIG. 5A, for example, the end of the lower part 17d of the coupling part 17 is inserted into the fitting groove 13d of the inner ring 13 from the insertion hole 13e provided in the fitting groove 13d of the inner ring 13. The lower portion 17 d of 17 is pushed into the fitting groove 13 d of the joint surface 13 c of the inner ring 13.

  Next, as shown in FIG. 2B, the coupling component 17 is connected to the coupling positions P1, P2, and P3 of the inner ring 13 through the three insertion holes 13e of the fitting groove 13d of the joint surface 13c of the inner ring 13 shown in FIG. When the insertion of the lower part 17d of the inner ring 15 is completed, the upper part 17u of the coupling component 17 inserted into the fitting groove 13d of the inner ring 13 is fitted into the fitting groove 15d of the inner ring 15 as shown in FIG. Finally, as shown in (d), when the fitting of the upper portion 17u of the coupling component 17 is completed at all the coupling positions P1, P2, and P3 of the inner ring 13 shown in FIG. Is completed.

  FIG. 5 illustrates an example in which insertion holes 13e are provided in three places in the fitting groove 13d of the inner ring 13 and no insertion holes are provided in the inner ring 15, but insertion holes are provided in three places in the fitting groove 15d of the inner ring 15. 15e may be provided, and the inner ring 13 may not be provided with the insertion hole, or the insertion holes 13e and 14e may be provided in both the fitting groove 13d of the inner ring 13 and the fitting groove 15d of the inner ring 15.

  As described above in detail, according to the embodiment, the fitting grooves 13d and 15d are formed on the joint surfaces 13c and 15c of the inner ring 15 adjacent to the inner ring 13 and the fitting grooves 13d and 15d are made of an elastic material. Since the inner ring 13 and the adjacent inner ring 15 are coupled by fitting the coupling part 17, the inner ring 13 and the inner ring 15 can be prevented from being separated with a simple structure, and the manufacturing cost can be reduced.

  Further, the fitting groove 13d of the inner ring 13 and the fitting groove 15d of the inner ring 15 have the same shape as the upper part 17u or the lower part 17d of the coupling component 17, respectively, and gradually the entrance on the side of the joining surface 13 and the joining surface 15c becomes narrower and deeper. The inner ring 13 and the inner ring 15 can be reliably prevented from being separated.

  Further, coupling positions P1 provided at three equal positions on the circumference of the fitting groove 13d formed on the joining surface 13c of the adjacent inner ring 13 and the fitting groove 15d formed on the joining surface 15c of the inner ring 15. Since the coupling component 17 is fitted in P2, P3, the separating force applied to the inner ring 13 and the inner ring 15 can be received in a balanced manner, so that a larger separating force can be countered.

  In addition, although it was set as three places, joining position P1, P2, P3, as long as it is equidistant on the circumference of the joint surface 13c of the inner ring | wheel 13, and the joint surface 15c of the inner ring | wheel 15, two places or five places may be sufficient. Further, the entire circumference may be coupled by one coupling component 17 formed in a circle in accordance with the fitting groove 13d of the adjacent inner ring 13 and the fitting groove 15d of the inner ring 15, or straight in the longitudinal direction. The fitting groove 13d of the inner ring 13 and the fitting groove 15d of the inner ring 15 may be coupled over the entire circumference by using one soft coupling component 17 formed in a shape.

  The collar 13b 'of the inner ring 13 and the collar 15b of the inner ring 15 counteract the force that the cylindrical roller 12 pushes the collar 13b of the inner ring 13 outward and the force that the cylindrical roller 14 pushes the collar 15b' of the inner ring 15 outward. However, the collar 13b 'of the inner ring 13 and the collar 15b of the inner ring 15 may be eliminated.

  The double-row cylindrical roller bearing of the present invention includes an inner ring 13, a shaft in contact with the inner ring 15, a crane sheep bearing in which the inner ring 13 and the inner ring 15 do not rotate, and the outer ring 16 rotates through a plurality of cylindrical rollers 12 and 14. Suitable for.

11 ... cylindrical roller bearings 12, 14 ... cylindrical rollers 13, 15 ... inner ring 16 ... outer rings 13a, 15a, 16a, 16a '... raceway surfaces 13b, 13b', 15b, 15b ' .... Collars 13c, 15c ... Joint surfaces 13d, 15d ... Fitting grooves 13e, 15e ... Insertion hole 17 ... Connecting part 17u ... Upper part 17d of connecting part ... Lower part of connecting part P1, P2, P3 ... coupling position 18 ... groove 19 ... shield plate

Claims (5)

A plurality of inner rings having a cylindrical roller raceway surface;
A double row cylindrical rolling bearing comprising an integral outer ring having raceway surfaces of the plurality of cylindrical rollers,
A double-row cylinder characterized in that fitting grooves are formed on joint surfaces on the circumference of the adjacent inner rings, and a connecting part made of an elastic material is fitted into the fitting grooves to connect the adjacent inner rings. Roller bearing. The coupling part is composed of an upper part and a lower part that are formed with a narrow cross-section at the center and gradually wider toward both ends.
The fitting groove is formed in the same shape as an upper part and a lower part of the coupling part, and is formed so as to gradually become wider at an entrance of an adjacent surface of the inner ring toward the back. The double-row cylindrical roller bearing according to 1.   3. The composite according to claim 1, wherein the coupling parts are fitted into a plurality of positions provided at equal intervals on a circumference of a fitting groove formed on the joint surface of the adjacent inner rings. Row cylindrical roller bearing.   An insertion hole is formed at the end of a plurality of positions provided at equal intervals on the circumference of the fitting groove formed on the joint surface of the adjacent inner rings, in accordance with the width of the end of the coupling component. The double row cylindrical roller bearing according to any one of claims 1 to 3.   The double row cylindrical roller bearing according to any one of claims 1 to 4, wherein the shaft and the plurality of inner rings that are in contact with the inner ring do not rotate, and the plurality of cylindrical rollers rotate via the outer ring.

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