JP4433989B2 - Manufacturing method of shell type full complement roller bearing - Google Patents

Description

The present invention relates to a method for manufacturing a shell-shaped full roller bearing suitable for use in a portion where an excessive load is applied, such as a link portion of a suspension mechanism of a two-wheeled vehicle, and in particular, between ribs provided at both end portions of an outer ring. The present invention relates to a method for manufacturing a shell-type full roller bearing in which a heat-solidifying lubricant is sealed.

Shell-type full roller bearings can have a larger number of rollers on the raceway surface of the outer ring than the roller bearings with shell-type cages, and have a very high load bearing capacity. In general, lubricants such as lubricating oils and greases are used for lubrication of such full complement roller bearings, but in order to prevent lubricant leakage and facilitate maintenance, an ultra high molecular weight synthetic resin, There has been proposed a bearing of a type in which a heat-solidifying lubricant obtained by heat-solidifying a mixture with grease or lubricating oil is enclosed in the bearing without any gap (see Patent Document 1). In a bearing filled with such a heat-solidifying lubricant, a liquid heat-solidifying lubricant is sealed inside the bearing before heat-solidifying, then solidified by heating, and then heat-solidifying adhered to an outer ring or the like. It is manufactured through a process of separating the mold lubricant. In the process of encapsulating the heat-solidifying lubricant in this manufacturing process, the roller inside the bearing is tilted in an oblique posture with respect to the axial direction by the sealing pressure when the heat-solidifying lubricant is encapsulated. The roller is inclined with respect to the normal rotation axis), and in this skewed state, the heat-solidifying lubricant may be heat-solidified in the next heat-solidifying step. If the heat-solidifying lubricant is heated and solidified, the posture of the roller cannot be corrected. If the rollers are skewed, as is well known, the roller rolling surface slips with respect to the outer ring raceway surface during bearing operation, which may cause surface damage such as smearing. There are various inconveniences, such as moving the mold lubricant in the axial direction as a guide surface and hitting the inner surface of the buttock or increasing the rotational torque.
JP-A-6-50330

The problem to be solved by the present invention is that in the heat solidifying lubricant enclosing step, the heat solidifying lubricant can be encapsulated in a state where the rollers are not skewed with respect to the raceway surface of the outer ring. The present invention relates to a method for manufacturing a roller bearing.

A shell-type full roller bearing according to the present invention includes a shell-type outer ring having a radially inward flange at its end, a plurality of rollers disposed on the raceway surface of the outer ring, and a heat-solidified sealed inside the bearing. In the method of manufacturing a shell-type full roller bearing having a mold lubricant, the flange portion has a flange height set to 40% or more and 60% or less of the roller diameter, and a roller shaft disposed at a normal position. And a flat portion of the flange on one side in the axial direction substantially perpendicular to the roller rolling surface at a location facing the end surface on one side in the direction, and the roller has at least one flange on the one side in the axial direction. The axial end surface on one side in the axial direction when pushed into the inside of the bearing substantially perpendicular to the roller rolling surface and filled with lubricant by the end face of the axial direction on the side facing the flat portion of the part the heat with a flat portion at one side in the axial direction of the roller that can be in surface contact with the flat portion of the part Radially inwardly of the roller in front of the shell-shaped full complement roller bearing enclosing the reduction type lubricant radially outer surface is a dummy shaft circumscribing the inscribed circle around the inner diameter surface of the flange portion, of the flange portion A gap on one side in the axial direction with the outer diameter surface of the dummy shaft that faces the inner diameter surface in the radial direction is covered with a jig, and the inner diameter surface of the flange portion and the inner diameter surface of the flange portion in the radial direction are covered. The liquid heat-solidifying lubricant is sealed from the other opposing gap in the axial direction with the outer diameter surface of the dummy shaft facing each other , and then the liquid heat-solidifying lubricant is heat-solidified. Is .

  The collar portion has a first shape that extends straight inward in the radial direction from the axial end portion of the outer ring, extends straight inward in the radial direction from the axial end portion of the outer ring, and is further bent toward the inside of the bearing. A second shape, etc. The flat part in the collar part provided with the 1st shape can be comprised by the inner surface. The flat part in the collar part provided with the 2nd shape can be comprised by the end surface of the bending end part.

  According to the present invention, since the collar height of the collar portion of the outer ring is set to 40% or more and 60% or less of the roller diameter, the inner diameter of the collar portion is set when the roller is subjected to skew by receiving the sealing pressure of the lubricant. The end of the roller passes through the center of the roller, and the roller end face can be brought into contact with the maximum diameter portion or the vicinity of the maximum diameter portion to suppress the roller skew, and the roller skew can be effectively prevented. When the collar height is less than 40% of the roller diameter, the inner diameter end of the collar part contacts the roller end face at a position away from the maximum diameter part of the roller end face, so that the effect of preventing skewing is reduced and the collar height is reduced. When the diameter exceeds 60% of the roller diameter, the inner diameter end of the collar comes into contact with the roller end surface at a position away from the maximum diameter portion of the roller end surface, so that the effect of preventing skewing is reduced and the inner diameter surface of the collar is inscribed. When the lubricant is sealed into the bearing from the gap facing the outer diameter surface of the shaft that is circumscribed by the circle, the gap between the bearings becomes smaller and the sealing speed of the lubricant is increased. Increase the momentum to enter, it will be difficult to reduce the roller skew force.

  In the present invention, as described above, the collar height of the collar portion is set to 40% or more and 60% or less of the roller diameter, and is opposed to the end face of the roller disposed at the regular position in the collar portion. A flat portion that is substantially perpendicular to the roller rolling surface is provided at the location, and the roller end surface is substantially perpendicular to the roller rolling surface and when the roller is pushed in the direction of sealing the lubricant by sealing the lubricant. There is a feature in that a flat portion capable of surface contact with the flat portion of the collar portion is provided. That is, regardless of the setting of the collar height, when the roller end face abuts against the collar in a state where the roller is skewed in the process of receiving the sealing pressure of the lubricant and being pushed in the pressure direction, A rotational moment acts so that the flat portion of the roller end surface comes into surface contact with the flat portion of the flange portion, thereby eliminating the roller skew.

  It is preferable to set the diagonal length between the both end faces of the roller to be equal to or greater than the opposing width of both flange portions. This opposite width is the distance between the inner surfaces of both flanges in the shape of the flange extending straight inward in the radial direction from the axial end of the outer ring, and straight inward in the radial direction from the axial end of the outer ring. In the collar portion that extends and is further bent toward the inside of the bearing, the distance between the opposite ends in the axial direction of both ends that are bent toward the inside of the bearing.

  According to the setting of the opposing widths of both flange parts, when the roller end face comes into contact with the flange part in the process of being pushed in the pressure direction by receiving the lubricant sealing pressure, depending on the skew state, There is a state in which the chamfered portion is in contact with the collar portion. In such a contact state, it is impossible to eliminate roller skew due to surface contact between the flat portion of the roller end surface and the flat portion of the flange portion. Therefore, by setting the diagonal length between both end faces of the roller to be equal to or greater than the opposing width of the flange, the roller chamfered portion can be prevented from contacting the flange. As a result, the roller skew can be eliminated by the flat part of the collar part and the flat part of the end face.

  As described above, in the full roller bearing of the present invention, when the heat-solidifying lubricant is sealed, roller skew is less likely to occur, and the heat-solidifying lubricant is sealed inside the bearing while the rollers are held in a normal posture. can do.

  The heat-solidifying lubricant is a lubricant in which a lubricating oil is mixed with a polymer such as ultrahigh molecular weight polyethylene and is solidified by heating. In this thermally solidified lubricant, a polymer forms an oil retaining mechanism. The solidified polymer has a fine porous structure, and lubricating oil is retained in the pores. The retained lubricating oil oozes out gradually due to the elastic deformation of the resin due to the action of stress, the difference between the linear expansion coefficients of the resin and the lubricating oil due to heating, and the like, and lubricates the bearing due to the capillary phenomenon. Experiments have confirmed that full roller bearings with built-in heat-solidifying lubricants are superior in lubricating oil retention capability compared to excessively greased bearings and ordinary greased bearings.

  Examples of the lubricating oil include mineral oil, synthetic hydrocarbon, ether oil, ester oil, silicon oil, fluorine oil, and the like, and these can be arbitrarily used. Further, the heat-solidifying lubricant can be blended with these lubricating oils with an extreme pressure additive or an antiwear agent. These extreme pressure additives and antiwear agents include general organometallic complexes such as Mo dicathiorubamate and Zn dithiophosphate, sulfur compounds such as diester sulfide and benzyl sulfide, tricresyl phosphate, and phosphate esters. Phosphorus series, halogen series such as alkylbenzene chloride, and the like can be used.

  The method of encapsulating the heat-solidifying lubricant is not particularly limited, but the inner space of the bearing is covered from both sides in the axial direction, and the liquid heat-solidifying lubrication is fluid or semi-solid with a heat-solidifying lubricant injection tube or jig. There is a method of injecting and encapsulating the agent. By encapsulating such a heat-solidifying lubricant, it is possible to reduce rotational torque, improve bearing life, prevent foreign matter from entering, and improve seizure resistance.

  The heat solidifying lubricant described above is injected into the bearing through a gap between the inner diameter surface of the flange and the outer diameter surface of the dummy shaft body that circumscribes the roller inscribed circle. The size of the facing gap is set according to the height of the collar, and by setting the collar height in the range of 40% to 60% of the roller diameter, an appropriate sealing pressure that does not skew the rollers is obtained. Thus, a liquid heat-solidifying lubricant can be enclosed. The ridge height is more preferably 50% or more and 60% or less, and most preferably 55% or more and 60% or less.

  The invention according to the application of the present applicant is disclosed in Japanese Patent Laid-Open No. 2001-20948. This publication describes a shell-type full roller bearing in which a heat-solidifying lubricant is sealed between the flanges at both ends of the race. However, in the shell-type full roller bearing described in the publication, FIG. 1 shows a shell-type full roller bearing in which the collar height is about 50% of the roller diameter. The ridge height in FIG. 1 is not intended to prevent roller skew with the enclosed pressure of the heat-solidifying lubricant. FIG. 4 shows a shell-type full roller bearing in which the collar height is more than 60% of the roller diameter, but it is possible to prevent roller skew by the sealing pressure of the heat-solidifying lubricant. Not intended.

  In the present invention, firstly, the collar height is in the range of 40% or more and 60% or less of the roller diameter, and a flat part is provided in the collar part, and secondly, the collar part is provided on the roller end face. The flat portion of the roller is in contact with the flat portion, and thirdly, the diagonal length between both end surfaces of the roller is set to be equal to or greater than the opposing width of the both flange portions, and the first and second combinations. Alternatively, the first, second and third combinations can effectively and reliably prevent the rollers from skewing in the course of sealing the lubricant inside the bearing.

  According to the present invention, it is possible to provide a shell-type full roller bearing capable of enclosing a heat-solidifying lubricant in the bearing without skewing the rollers.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat solidified lubricant encapsulated shell type full roller bearing according to an embodiment of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 4 show the shell type full roller bearing of the embodiment. 1 is a cross-sectional view of the shell-type full roller bearing, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a partial plan view of FIG. It is a perspective view. However, illustration of the heat-solidifying lubricant is omitted in FIG. A shell-type full roller bearing 10 shown in these drawings is composed of an outer ring 12, needle rollers 14, and a heat-solidifying lubricant 16 enclosed in the bearing. The outer ring 12 includes a cylindrical main body 12a and an annular flange 12b extending radially inward from both ends of the cylindrical main body 12a. The needle roller 14 is a roller having a flat end surface that is disposed on the inner circumferential raceway surface 12a1 of the cylindrical main body 12a of the outer ring 12. The heat-solidifying lubricant 16 is a mixture of a polymer such as ultra-high molecular weight polyethylene and a lubricating oil or grease, and has fluidity in the initial state and is solidified by heating. The lubricant is solidified by heating later.

  In the shell-type full complement roller bearing 10 having the above configuration, since the lubricant is solidified, it is difficult for the lubricant to flow out, and a large amount of lubricating oil can be enclosed and held in the bearing. Moreover, it is preferable for prevention of poor lubrication and maintenance of a clean environment, and it does not emulsify or flow out like grease even in a situation where the bearing is splashed. Furthermore, since it is equivalent to oil lubrication, unlike the grease, it can provide many advantages such as low agitation resistance and thus contribute to reduction of rotational torque. The heat-solidifying lubricant 16 has a mechanical strength comparable to that of hard rubber, although it retains a large amount of oil.

Drawn cup full complement roller bearing 10 having the configuration described above, as your Keru roller skew prevention structure during thermal curing type lubricant sealed, the inner diameter of the cylindrical body portion 12a of the flange height of the flange portion 12b (H = outer ring 12 The structure in which the inner diameter dimension D2) of the D1-rib portion 12b is set in the range of 40% or more and 60% or less of the roller diameter (D0) and the roller end surface 14a are substantially perpendicular to the roller rolling surface 14b and When the needle roller 14 is pushed in one axial direction by enclosing the lubricant 16, the flat portion 14c capable of making surface contact with the inner side surface 12b1 of the flange portion 12b (which constitutes the flat portion 12b1 of the flange portion 12b) is provided. The provided structure and the structure in which the diagonal length (L1) between the both end faces 14a of the needle roller 14 is set to be equal to or greater than the opposing width (L2, L2 ≦ L1) between the inner side faces 12b1 of both flange portions 12b. I have.

  The shell-type full roller bearing 10 having the above-described configuration has a small load force (force in the direction of skewing the needle rollers 14) applied to the needle rollers 14 when the heat-solidifying lubricant 16 is enclosed, and the needle-like roller bearings 10 have a needle shape. Even if the roller 14 is skewed and tilted obliquely with respect to the normal rotation axis, the tilt can be corrected, and the tilt of the needle roller 14 can be prevented beyond the limit at which the tilt can be corrected. it can.

  With reference to FIGS. 5 to 7, the process of encapsulating the heat-solidifying lubricant 16 in the full roller bearing 10 will be described. 5A and 5B are a cross-sectional view and a plan view of the full roller bearing 10 immediately after the start of encapsulation, and FIGS. 6A and 6B are a cross-sectional view and a plan view of the full roller bearing 10 being encapsulated, FIG. (A) and (b) are sectional views and plan views of the full roller bearing 10 in a state in which the needle rollers 14 are skewed during encapsulation.

As shown in FIGS. 5 (a) and 5 (b), a dummy shaft (inner ring) 18 is disposed inside the needle roller 14 of the full roller bearing 10 in the radial direction. The outer diameter surface of the dummy shaft 18 circumscribes the roller inscribed circle and is opposed to the inner diameter surface 12b2 of the flange portion 12b in the radial direction. A facing gap 20 between the outer diameter surface 18a of the dummy shaft 18 and the flange portion 12b2 forms an enclosing port 20 for the lubricant 16. The facing gap 20 on one side in the axial direction of the total roller bearing 10 in the facing gap 0 is covered with a jig 22, and the remaining facing gap 20 is used as a sealing port 20 for the lubricant 16. A liquid heat-solidified lubricant 16 is injected into the interior. The arrows in FIG. 5 indicate the injection direction of the thermally solidified lubricant 16. Since the lubricant injection port 20 is formed by a facing gap between the inner diameter surface 12b2 of the outer ring flange portion 12b and the outer diameter surface 18a of the dummy shaft 18, the cross-sectional area of the injection port 20 has a higher height. When the collar inner diameter is small, the height of the collar is not small, and when the collar inner diameter is large, the collar becomes large.

  Next, when the injection of the heat solidifying lubricant 16 is started, in the embodiment, the collar height (H) is set to 40% or more and 60% or less of the roller diameter (D), and the roller end surface 14a. Since the flat portion 14c substantially perpendicular to the roller rolling surface 14b is provided, the needle roller 14 is pushed in the direction of the sealing pressure by the sealing pressure of the lubricant 16, and the flat portion 14c of the roller end surface 14a The flat inner surface 12b1 at the inner diameter side end of the portion 12b is in surface contact as shown in FIGS. In this case, since the inner diameter side end portion of the flange portion 12b is in contact with the maximum diameter portion of the roller end surface 14a or the vicinity thereof, the needle roller 14 is eliminated from the skew state, and the needle roller 14 has a normal rotation axis. As a result of the large moment acting in the direction of correcting the inclination, no roller skew occurs. At the same time, the sealing pressure of the lubricant 16 is not too high due to the setting of the ridge height and is appropriate, and from this point also, the roller is less likely to skew and the roller inclination is prevented.

  In this case, since the diagonal length (L1) of the both end surfaces 14a of the needle roller 14 is set to be equal to or greater than the facing distance (L2) between the inner side surfaces 12b1 of both flange portions 12b, FIG. ), The roller end surface 14a does not skew beyond the roller chamfered portion 14d, and the needle roller 14 is deformed by the flat portion 14c of the roller end surface 14a before the heat-solidifying lubricant 16 is thermally solidified. The normal posture is corrected, and the thermally solidified lubricant 16 is thermally solidified in the corrected normal posture state.

In FIG. 8, both end portions in the axial direction of the outer ring 12 are bent inward in the radial direction, and the bent end portions are provided with flange portions 12b bent toward the inside of the bearing. The present invention can be similarly applied to the full roller bearing 10 including the portion 12. That is, in the full complement roller bearing 10 shown in FIG. 8, an outer ring 12 having a cylindrical main body 12a and an annular flange 12b extending radially inward from both ends of the cylindrical main body 12a, and the outer ring A plurality of needle rollers 14 having a flat end surface and disposed on the inner peripheral raceway surface 12a1 of the 12 cylindrical main body portions 12a, and a heat-solidifying lubricant 16 enclosed in the bearing 10; As you Keru roller skew prevention structure during thermal curing type lubricant 16 sealed flange height of the flange portion 12b (H) the roller diameter (D0) of 40% or more, the structure set in a range of 60% or less, the roller end face 14a Is provided with a flat portion 14c that is substantially perpendicular to the roller rolling surface 14b and that comes into surface contact with the flange portion 12b when the needle roller 14 is pushed in one axial direction by the inclusion of the lubricant, The diagonal length (L1) between the both end surfaces 14a of the needle roller 14 is set to be equal to or larger than the opposing width (L2) of the end portions (flat portions) 12b3 of the both flange portions 12b.

  The full roller bearing of the above embodiment can be applied to a link portion (not shown) of a suspension mechanism of a motorcycle.

  The present invention is not limited to the above-described embodiment, and includes various changes or modifications within the scope described in the claims.

1 is a cross-sectional view of a shell-type full roller bearing according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the full roller bearing of FIG. 1 taken along the line AA. FIG. 2 is a partial plan view of the full roller bearing of FIG. 1. It is a perspective view of the full roller bearing of FIG. It is sectional drawing and a top view of a full complement roller bearing just after the start of enclosure of a heat-solidifying lubricant. FIG. 6 is a cross-sectional view and a plan view of a full roller bearing that is encapsulated with a heat-solidifying lubricant. It is sectional drawing and a top view of a full roller bearing when a roller skews during thermal solidification type lubricant enclosure. It is sectional drawing of the shell-type full roller bearing which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shell type full roller bearing 12 Outer ring 12a Cylindrical main-body part 12a1 Track surface 12b Collar part 12b1 Inner side surface 12b2 Inner diameter surface 12b3 End part 14 Roller 14a Roller end face 14b Roller rolling surface 14c Flat part 14d Chamfer part 16 Thermal solidification lubrication Agent

Claims (2)

A shell-shaped outer ring having a shell-shaped outer ring having a radially inward flange at the end, a plurality of rollers disposed on the raceway surface of the outer ring, and a heat-solidifying lubricant enclosed in the bearing. In the method of manufacturing a roller bearing,
The collar is substantially on the roller rolling surface at a position facing the collar height set to 40% or more and 60% or less of the roller diameter, and the end face on one side in the axial direction of the rollers arranged at regular positions. A flat portion of the flange on one side in the axial direction perpendicular to the axis ,
The roller has at least one axial end surface facing the flat portion of the flange on one side in the axial direction , and is substantially perpendicular to the roller rolling surface and filled with the lubricant by the sealing pressure of the lubricant. Shell shape before sealing the heat-solidifying lubricant, comprising a flat portion on one axial side of a roller that can come into surface contact with a flat portion on one axial flange when pushed into the shaft A dummy shaft whose outer diameter surface circumscribes a roller inscribed circle is arranged on the inner side in the radial direction of the roller of the full roller bearing,
A gap on one side in the axial direction between the inner diameter surface of the collar portion and the outer diameter surface of the dummy shaft facing the inner diameter surface of the collar portion in the radial direction is covered with a jig,
A liquid thermally solidified lubricant is sealed from the other opposing gap in the axial direction between the inner diameter surface of the flange portion and the outer diameter surface of the dummy shaft facing the inner diameter surface of the flange portion in the radial direction, A method for producing a shell-type full roller bearing, characterized in that the liquid heat-solidifying lubricant is heat-solidified.   The method for manufacturing a shell-type full roller bearing according to claim 1, wherein a diagonal length between both end faces of the roller is set to be equal to or greater than a facing width of both flange portions.

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