JP2009041681A - Pin type retainer and roller bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin type retainer capable of preventing welding distortion of a pin and a roller bearing provided with it. <P>SOLUTION: In a through hole 104 of a second ring 102, its diameter is gradually enlarged toward a first ring 101 side. An adapter sleeve 109 is arranged between a through hole 104 and an end part of the second ring 102 side of the pin 103. The adapter sleeve 109 has an enlarged diameter part of which diameter is gradually enlarged toward the first ring 101 side and is provided with a screw part continued to a small diameter end part of the enlarged diameter part. A slit is formed for the diameter enlarged part. A nut 110 is screwed to the screw part of the adaptor sleeve 109 to fasten. Thus, an inner surface of the through hole 104 of the second ring 102 and an outer surface of the diameter enlarged part of the adaptor sleeve 109 press each other and the pin 103 is clumped by an inner surface of the adaptor sleeve 109. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pin type cage used in, for example, a wind power generator and a steel rolling mill, and a roller bearing provided with the pin type cage.

  Conventionally, as shown in FIG. 7, a roller bearing includes a cylindrical roller 301 and a pin type retainer 302 that holds the cylindrical roller 301 (Patent Document 1: Japanese Utility Model Publication No. 56-111318). Publication).

  The pin type retainer 302 includes an annular first ring 304 and second ring 305, and a plurality of round bar-like pins 303 (only one is shown) connecting the first ring 304 and the second ring 305. Prepare.

  Each pin 303 is inserted through a through hole 306 at the center of the cylindrical roller 301 so that the cylindrical roller 301 can rotate freely and the interval between the cylindrical rollers 301 is kept constant. One end of the pin 303 is screwed into the second ring 305, and the other end of the pin 303 is inserted into a conical through hole 307 formed in the first ring 304. Between the inner surface of the conical through hole 307 and the other end of the pin 303, a bush 308 having an outer peripheral surface is press-fitted, and the pin 303 and the first ring 304 are welded, 303 is fixed to the first ring 304.

  As described above, in the conventional pin type holder 302, since the fixing force of the pin 303 to the first ring 304 is weak, it is necessary to weld the pin 303 and the first ring 304.

However, when the pin 303 and the first ring 304 are welded, welding distortion occurs in the first ring 304 and the pin 303, and the perpendicularity of the pin 303 to the first ring 304 is deteriorated.
Japanese Utility Model Publication No. 56-111318

  Then, the subject of this invention is providing the pin type holder | retainer which can prevent that a welding distortion arises in a pin, and a roller bearing provided with the same.

In order to solve the above problems, the pin type cage of the present invention is
A second ring provided with a predetermined interval in the circumferential direction with the first ring and having a plurality of through-holes whose diameter gradually increases as approaching the first ring side;
One end is attached to the first ring, and the end on the second ring side is a round bar-like pin loosely fitted in the through hole of the second ring;
The pin is disposed between the end of the pin on the second ring side and the through hole of the second ring, and the diameter gradually increases as it approaches the first ring side, and the diameter is increased with a slit. And an adapter sleeve having a threaded portion connected to the small-diameter end of the enlarged-diameter portion,
A screwing member attached to the threaded portion of the adapter sleeve,
By screwing and screwing the screwing member into the threaded portion of the adapter sleeve, the inner surface of the through hole of the second ring and the outer surface of the enlarged diameter portion of the adapter sleeve are pressed against each other, and the pin is fixed to the adapter It is characterized by being clamped on the inner surface of the sleeve.

  According to the pin type cage having the above-described configuration, the slit of the enlarged diameter portion becomes smaller and the adapter sleeve moves away from the first ring as the screwing member screwed into the screw portion of the adapter sleeve is tightened. proceed. As a result, the inner surface of the through hole of the second ring and the outer surface of the enlarged diameter portion of the adapter sleeve are pressed against each other, and the pin is clamped by the inner surface of the adapter sleeve.

  As a result, since the pin is firmly fixed to the second ring, it is not necessary to weld the second ring and the pin.

  Therefore, it is possible to eliminate welding between the second ring and the pin and prevent welding distortion from occurring in the pin.

  Further, since the occurrence of welding distortion of the pin can be prevented, it is possible to prevent the degree of perpendicularity of the pin with respect to the second ring from being deteriorated.

The roller bearing of the present invention is
Inner ring,
Outer ring,
A plurality of rollers disposed between the inner ring and the outer ring and having a through hole;
The pin-type retainer having the pin inserted through the through holes of the plurality of rollers.

  According to the roller bearing having the above-described configuration, since the pin type retainer is provided, the gap between the rollers can be reduced, and the rollers can be held in a normal posture, and thus can rotate smoothly.

  According to the pin type cage of the present invention, the inner surface of the through-hole of the second ring and the outer surface of the enlarged diameter portion of the adapter sleeve are pressed against each other by screwing the screwing member into the screw portion of the adapter sleeve and tightening. In addition, since the pin is clamped on the inner surface of the adapter sleeve, the pin is firmly fixed to the second ring, so that it is not necessary to weld the second ring and the pin.

  Therefore, it is possible to eliminate welding between the second ring and the pin and prevent welding distortion from occurring in the pin.

  Further, since the occurrence of welding distortion of the pin can be prevented, it is possible to prevent the degree of perpendicularity of the pin with respect to the second ring from being deteriorated.

  According to the roller bearing of the present invention, since the pin type cage is provided, the gap between the rollers can be reduced, and the rollers can be held in a normal posture, so that they can rotate smoothly.

  Hereinafter, the pin type cage and the roller bearing of the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 shows a schematic view of a tapered roller bearing according to an embodiment of the present invention as viewed obliquely. In FIG. 1, a part of the tapered roller bearing is removed in order to show a cross section of the tapered roller bearing.

  The tapered roller bearing includes an inner ring 1, an outer ring 2, a plurality of tapered rollers 3 disposed between the inner ring 1 and the outer ring 2, and a pin type that holds the tapered rollers 3 so as to keep a predetermined distance therebetween. And a cage 100.

  FIG. 2 shows an enlarged view of a portion surrounded by a circle A in FIG.

  The inner ring 1 has an inner ring raceway surface 4 that is inclined with respect to the axial direction. Further, the inner ring 1 has flanges 6 formed on both sides of the inner ring raceway surface 4 in the axial direction.

  The outer ring 2 has an outer ring raceway surface 5 that is inclined with respect to the axial direction and extends along the inner ring raceway surface 4. The outer ring 2 is formed such that one axial end is thicker than the other axial end, and the cross-sectional shape is substantially trapezoidal.

  A through hole 7 is formed at the center of each tapered roller 3. The through hole 7 extends along the central axis (rolling axis) of the tapered roller 3 and passes through the tapered roller 3.

  The pin type retainer 100 is formed of an annular first ring 101 formed from S25C, which is carbon steel, and an S1C, which is carbon steel, provided in the first ring 101 at an interval in the axial direction. An annular second ring 102 and a plurality of round bar-like pins 103 formed from SAE 8620, which is a case hardened steel, are inserted through the through hole 7 at the center of the tapered roller 3.

  A plurality of screw holes 105 are formed in the first ring 101 at predetermined intervals in the circumferential direction. Each screw hole 105 passes through the first ring 101.

  The second ring 102 has an outer diameter smaller than the outer diameter of the first ring 101 and an inner diameter smaller than the inner diameter of the first ring 101.

  Each of the pins 103 is subjected to a carburizing process, and one end is attached to the first ring 101 and the other end is attached to the second ring 102. Each of the pins 103 is inserted into the through hole 7 at the center of the tapered roller 3 and rotatably supports the tapered roller 3. A screw shaft 106 is formed at the end of each pin 103 on the first ring 101 side. The end of each pin 103 on the first ring 101 side is fixed to the first ring 101 by screwing the screw shaft 106 into the screw hole 105 of the first ring 101.

  3, 4, and 5 each show a schematic cross section of the pin type retainer 100. FIG. 4 shows a schematic cross section viewed from a direction different from FIG. Further, FIG. 5 shows a schematic cross section viewed from a different direction from FIGS.

  As shown in FIG. 3, a plurality of through holes 104 are formed in the second ring 102 at predetermined intervals in the circumferential direction. Each through hole 104 has a conical shape that penetrates the second ring 102 and gradually increases in diameter as it approaches the first ring 101 side. Further, the end of the pin 103 (only one is shown) on the second ring 102 side is loosely fitted in each through hole 104.

  As shown in FIG. 4, a hexagonal column-shaped blind hole 115 is formed on the end surface of each pin 103 on the second ring 102 side.

  Moreover, the said pin type holder | retainer 100 is provided with the adapter sleeve 109 and the hexagon nut 110, as shown in FIGS. The hexagon nut 110 is an example of a screwing member.

  The adapter sleeve 109 is made of carbon steel S25C and is disposed between the end of the pin 103 on the second ring 102 side and the through hole 104 of the second ring 102. The carbon steel may be S15C, S20C, S30C, S35C, S40C, S45C, S50C, S55C.

  FIG. 6 is a schematic view of the adapter sleeve 109 as viewed from an oblique direction.

  The adapter sleeve 109 has a threaded portion 111 and an enlarged diameter portion 112, and has a through hole 114 extending along its own central axis.

  The said enlarged diameter part 112 is formed so that a diameter may be gradually expanded as it approaches the 1st ring 101 side (refer FIGS. 3-5). Further, the enlarged diameter portion 112 is formed with a slit 113 communicating with the through hole 114.

  The threaded portion 111 is continuous with the small diameter end portion of the enlarged diameter portion 112, and the hexagon nut 110 is screwed into the threaded portion 111 as shown in FIGS. 3, 4, and 5.

  Hereinafter, the assembly of the pin type cage 100 will be described.

  When assembling the pin type cage 100, first, the plurality of tapered rollers 3 are placed on the first ring 101. At this time, the interval between the tapered rollers 3 is kept at a predetermined level by a jig (not shown), and the positions of the screw hole 105 of the first ring 101 and the through hole 7 at the center of the tapered roller 3 are matched.

  Next, a temporary assembly of the second ring 102, adapter sleeve 109 and hexagon nut 110 is placed on the plurality of tapered rollers 3. At this time, the positions of the through hole 114 of the adapter sleeve 109 and the through hole 7 at the center of the tapered roller 3 are aligned.

  Next, the pin 103 is inserted into the through hole 114 of the adapter sleeve 109 and the through hole 7 at the center of the tapered roller 3. Then, after fitting the tip portion of a hexagon wrench (not shown) into the blind hole 115 on the end surface of the pin 103 on the second ring 102 side, the hexagon wrench is turned to attach the screw shaft 106 of the pin 103 to the first ring. The screw hole 105 of the 101 is screwed. As a result, the end of the pin 103 on the first ring 101 side is fixed to the first ring 101.

  Next, the hexagon nut 110 is tightened after adjusting the axial interval between the first ring 101 and the second ring 102. Along with this, the slit 113 of the enlarged diameter portion 112 becomes smaller, and the adapter sleeve 109 advances in a direction away from the first ring 101. When the tightening of the hexagon nut 110 is completed, the slit 113 of the enlarged diameter portion 112 is closed, and the inner surface of the through hole 104 of the second ring 102 and the outer surface of the enlarged diameter portion 112 of the adapter sleeve 109 are mutually connected over the entire circumference. Press.

  When the tightening of the hexagon nut 110 is completed, the end of the pin 103 on the second ring 102 side is clamped by the inner surface of the adapter sleeve 109.

  As a result, since the pin 103 is firmly fixed to the second ring 102, the second ring 102 and the pin 103 need not be welded.

  Therefore, welding between the second ring 102 and the pin 103 can be eliminated, and welding distortion can be prevented from occurring in the pin 103.

  Further, since welding distortion can be prevented from occurring in the pin 103, the perpendicularity of the pin 103 to the second ring 102 can be favorably maintained.

  Further, since the tapered roller bearing is provided with the pin type cage 100, the gap between the tapered rollers can be reduced, and the tapered roller 3 can be held in a normal posture, so that it can rotate smoothly. .

  In the above embodiment, the plurality of tapered rollers 3 are held by the pin type cage 100, but the pin type cage of the present invention is not limited to the one used only for the tapered roller bearings, and is a cylindrical roller bearing. It can be used for various other roller bearings.

  In the above embodiment, the adapter sleeve 109 is used only for coupling the end of the pin 103 on the second ring 102 side and the second ring 102, but the end of the pin 103 on the second ring 102 side In addition to being used for coupling with the second ring 102, it may be used for coupling between the end of the pin 103 on the first ring 101 side and the first ring 101.

  In the above embodiment, the first ring 101 and the second ring 102 are made of carbon steel. However, the first ring 101 and the second ring 102 may be made of rolled steel for general structures including SS400, and the material is limited. is not. Moreover, although the said pin 103 was formed from the case hardening steel, material is not limited. Further, although the adapter sleeve 109 is also made of carbon steel, the material thereof is not limited.

FIG. 1 is a schematic perspective view of a roller bearing according to an embodiment of the present invention. FIG. 2 is an enlarged schematic view of a portion within a circle A in FIG. FIG. 3 is a schematic cross-sectional view of a pin type cage according to an embodiment of the present invention. FIG. 4 is another view showing a schematic cross section of the pin type cage. FIG. 5 is another view showing a schematic cross section of the pin type cage. FIG. 6 is a schematic perspective view of an adapter sleeve of the pin type cage. FIG. 7 is a schematic cross-sectional view of a main part of a conventional roller bearing.

Explanation of symbols

100 pin type cage 101 first ring 102 second ring 103 pin 104 through hole 109 adapter sleeve 110 hexagon nut 111 threaded part 112 enlarged diameter part

Claims (2)

A second ring provided with a predetermined interval in the circumferential direction with the first ring and having a plurality of through-holes whose diameter gradually increases as approaching the first ring side;
One end is attached to the first ring, and the end on the second ring side is a round bar-like pin loosely fitted in the through hole of the second ring;
The pin is disposed between the end of the pin on the second ring side and the through hole of the second ring, and the diameter gradually increases as it approaches the first ring side, and the diameter is increased with a slit. And an adapter sleeve having a threaded portion connected to the small-diameter end of the enlarged-diameter portion,
A screwing member attached to the threaded portion of the adapter sleeve,
By screwing and screwing the screwing member into the threaded portion of the adapter sleeve, the inner surface of the through hole of the second ring and the outer surface of the enlarged diameter portion of the adapter sleeve are pressed against each other, and the pin is fixed to the adapter A pin-type cage that is clamped on the inner surface of a sleeve. Inner ring,
Outer ring,
A plurality of rollers disposed between the inner ring and the outer ring and having a through hole;
A roller bearing comprising: the pin type retainer according to claim 1, wherein the pin is inserted into through holes of the plurality of rollers.

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