JP2015143528A - Thrust cone bearing and thrust cone bearing manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thrust cone bearing and a thrust cone bearing assembly method capable of preventing erroneous assembly of components attached to a hole provided in a fixed ring and improving assemblability.SOLUTION: Provided is a method of manufacturing thrust cone bearing 1 comprising: a pair of a disc fixed ring 2 and a disc rotating ring 4 disposed coaxially and each having a rolling surface; and a plurality of conical rolling elements 3 provided between the rolling surfaces of the fixed ring 2 and the rotating ring 4 and rotating the fixed ring 2 and the rotating ring 4 relatively to each other, a hole 5 for suspending the fixed ring 2 being formed at the center of the fixed ring 2. In a case of the thrust cone bearing 1 with oil drainage function, a hollow bush 6 is fitted into the hole 5 with the fixed ring 4 used as a first fixed ring. In a case of the thrust cone bearing 1 without the oil drainage function, a grommet 7 without a hole is fitted into a hole of a second fixed ring larger in diameter than the hole 5 of the first fixed ring using the second fixed ring. It is thereby possible to selectively add the oil drainage function to the thrust cone bearing 1.

Description

  The present invention relates to a thrust cone bearing and a method for manufacturing a thrust cone bearing.

  Conventionally, thrust cone bearings have been used in large-scale manufacturing apparatuses such as rolling mills. As shown in FIG. 1, such a thrust cone bearing has a pair of disk-shaped fixed wheels 2 and rotating wheels 4 that are coaxially arranged and provided with rolling surfaces, and the fixed wheels 2 and the rotating wheels 4. And a plurality of conical rolling elements 3 that rotate between the pair of fixed wheels 2 and the rotating wheel 4.

  In the center of the fixed wheel 2 and the rotating wheel 4, a hole 5 for lifting and hanging these members is drilled, and the bearing is assembled by lifting it with a jig (not shown).

  Further, the hole 5 formed in the fixed ring can be used for hanging the fixed ring, and can be used as an oil drain hole for a bearing lubricant by press-fitting a hollow bush into the hole. Further, in the specification of a bearing that does not require an oil drain function, the hole can be sealed with a grommet without a hole.

JP 2005-264980 A

  However, in order to easily set the specifications with or without oil draining function using the thrust cone bearing of Patent Document 1, a bush or grommet is attached to the hole for each specification using a fixed ring with a common shape. Therefore, there is a possibility that a hollow bush or a holeless grommet may be mistakenly attached to the hole due to erroneous assembly contrary to the specification.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent a misassembly of a member to be attached to a hole provided in a fixed ring, and to improve the assembling workability. It is to provide an assembling method.

  Therefore, in order to solve the above-described problems, the present invention is provided between a pair of disk-shaped fixed wheels and rotating wheels arranged on the same axis and having rolling surfaces, and between the fixed wheels and the rolling surfaces of the rotating wheels. A thrust cone bearing comprising a plurality of conical rolling elements that relatively rotate the pair of fixed wheels and the rotating wheel, and a hole for lifting the fixed ring is formed in the center of the fixed ring, In a thrust cone bearing with a function, the fixed ring is used as a first fixed ring, and a hollow bush is fitted in the hole. On the other hand, in a thrust cone bearing without an oil draining function, the first fixed ring A hole-free grommet is fitted into the hole using a second fixed ring having a hole having a diameter different from that of the hole.

  According to the thrust cone bearing and the manufacturing method thereof of the present invention, the bush and the grommet can be attached to the fixed ring accurately and quickly according to the setting of whether or not there is an oil drainage hole, and there is an effect of avoiding erroneous assembly.

It is a figure which shows a thrust cone bearing. It is the A section expanded sectional view of Drawing 1 of an oil drain hole specification concerning the present invention. It is the A section expanded sectional view of Drawing 1 of the specification without oil drain hole concerning the present invention.

  Hereinafter, a thrust cone bearing and a method for manufacturing a thrust cone bearing according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, the thrust cone bearing 1 includes a pair of disk-shaped fixed wheels 2 and a rotating wheel 4 that are coaxially arranged on a rotating shaft and provided with rolling surfaces, and the fixed wheel 2. And a plurality of conical rolling elements 3 between the rolling surfaces of the rotating wheel 4 and relatively rotating the pair of fixed wheels 2 and the rotating wheel 4. A counterbore 5a is provided on the outer surface of the bearing at the center of the disk-shaped fixed ring, and a hole 5 for lifting the fixed ring having a diameter D1 is formed in the center of the counterbore.

  When the oil drain function of the lubricant is added to the thrust cone bearing 1, a cylindrical bush 6 provided with a flange portion 6a having a diameter D3 at one end is inserted into the hole 5 from the counterbore surface side of the fixed ring. The bush 6 is positioned by press-fitting and abutting the flange 6a against the counterbore 5a. (The fixed ring used in the specification is referred to as the first fixed ring.)

  On the other hand, in the thrust cone bearing 1 without oil draining function, a flange 7a is provided at one end using a second fixed ring having a diameter D2 larger than the diameter D1 of the hole of the first fixed ring. The cylindrical grommet 7 having a diameter D4 provided is press-fitted into the hole 5 from the surface side of the counterbore part 5a of the fixed ring 2, and the grommet is positioned so that the flange part is abutted against the counterbore part. Is going.

  Further, if the bushes, the grommets, and the holes of the two types of fixed rings are set so that the relations D1 <D4 and D3 <D2 are established, the grommets that are mistaken in the first fixed ring cannot be attached, Since the bushes mistaken in the two fixed rings pass through the holes, the assembling is impossible and the erroneous assembly can be effectively prevented.

  In this way, the hole for hanging the fixed ring is used as a lubricant discharge hole, and the diameter of the suspension hole is made different depending on the specification of the thrust cone bearing with or without lubricant discharge. If it is going to press-fit a grommet, it will become very difficult to carry out regular assembly and erroneous assembly can be prevented beforehand.

  As described above, the structure of the thrust cone bearing of the present invention has been described in detail. However, the present invention is not limited to the above example. For example, the diameter of the hole of the second fixed ring is larger than the hole of the first fixed ring. Needless to say, various improvements and modifications may be made without departing from the scope of the present invention, such as when the direction is smaller (D1> D2).

DESCRIPTION OF SYMBOLS 1 ... Thrust cone bearing 2 ... Fixed wheel 3 ... Rolling element 4 ... Rotating wheel 5 ... Hole 6 ... Bush 7 ... Grommet

Claims (2)

  A pair of disk-shaped fixed wheels and rotating wheels arranged on the same axis and provided with rolling surfaces, and the pair of fixed wheels and rotating wheels relatively rotate between the fixed wheels and the rolling surfaces of the rotating wheels. A thrust cone bearing comprising a plurality of conical rolling elements, wherein a hole for lifting the fixed ring is formed in the center of the fixed ring, and in the thrust cone bearing with oil draining function, the fixed ring is In the thrust conical bearing without oil draining function, a second fixed member having a hole larger in diameter than the hole of the first fixed ring is used. A thrust cone bearing, wherein a ring-free grommet is fitted into the hole using a ring.   A pair of disk-shaped fixed wheels and rotating wheels arranged on the same axis and provided with rolling surfaces, and the pair of fixed wheels and rotating wheels relatively rotate between the fixed wheels and the rolling surfaces of the rotating wheels. A method of manufacturing a thrust cone bearing including a plurality of conical rolling elements, wherein a hole for lifting the fixed ring is formed in the center of the fixed ring, and in the thrust cone bearing with an oil draining function, the fixed ring Is used as a first fixed ring, and a hollow bush is fitted into the hole. On the other hand, in a thrust conical bearing without oil draining function, a hole having a diameter larger than that of the first fixed ring is provided. A method for manufacturing a thrust conical bearing, wherein a drainage function is selectively provided by fitting a holeless grommet into the hole using two fixed rings.

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