JPS5828017A - Holder for cylindrical roll bearing - Google Patents

Abstract

PURPOSE:To facilitate assembly of a bearing, by forming in a roller holder ring part a fitting peripheral surface with which a holder main unit flange part fit, a protruding part positioned in a recessed part of a cylindrical roller end surface, and a pawl part hooked to the flange part. CONSTITUTION:When a holder 4 is assembled to a bearing, a holder main unit 6 is assembled into an outer ring 1 to insert and a cylindrical roller 3 is inserted into a pocket of the holder main unit 6, and then a protruding part 12 of a roller holder 10 is placed to the inside, and aligned about to the position of a recessed part 3a of the cylindrical roller 3, if pressed from the outside of a flange part 8 of the holder main unit 6, a tapered surface 21 formed to the protruding part 12 is used as a guide surface, and an internal surface of a pawl part 12 and an annular surface 15 of a ring part 11 are respectively adapted to a circular outside surface of the flange part 8 of the holder main unit 6, then a fitting peripheral surface 17 of the ring part 11 is hooked, between internal diameter surfaces of the flange part 8 of the holder main unit 6, in a state of forming a slight clearance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cage for a single cylindrical roller bearing, and in particular, to a cage made of synthetic resin, the 7-rank portion of the cage body made of metal is provided with a protrusion that engages with a recess on the end face of the cylindrical roller. By fitting the roller holder so that it can move in the circumferential direction, the strength and precision of the holder are increased, and the molding process of the holder and the assembly of the bearing are facilitated.

In general, in a cylindrical roller bearing G having a structure in which one force of the bearing raceway can be separated, a cage that engages with four parts of the end face of the five cylindrical rollers to prevent the cylindrical rollers from falling off has been conventionally used. A protrusion is formed by extruding and deforming a protrusion formed on the circumferential side wall of a pocket to engage a concave part of a cylindrical roller, or a protrusion is formed by suppressing and deforming the bottom of a concavity provided in a circumferential wall member of a cage. It is known that this protrusion is engaged with a recessed portion V of a cylindrical roller. However, these conventional one-piece cages have a complex cage structure6 and are difficult to mold, and also require skill in positioning the cylindrical rollers during bearing assembly. There is a limit to the machining precision of the holding part, and the rollers and the holding part may come into contact and impede rotational performance, or the fall of the other bearing ring may be difficult due to the small clearance and the falling amount. It has drawbacks such as being difficult to attach.

This invention was made in order to eliminate the above-mentioned drawbacks, and an object of the invention is to provide a separate cage body made of a metal punched or machined cage body and a synthetic resin roller holder body. It is an object of the present invention to provide a high-strength and high-precision cylindrical roller bearing cage, and another object of the present invention is to provide a cage for a cylindrical roller bearing that does not require a strict sheath layer for circumferential positioning between the cage body and the holder. It is an object of the present invention to provide a cylindrical roller bearing retainer that can be easily assembled, and a further object of the present invention is to provide a cylindrical roller bearing retainer that can be manufactured at low cost through processing and forming in a simple process. .

That is, the present invention is applicable to IF-1 as in the illustrated embodiment.
In a cylindrical roller bearing cage consisting of a metal cage main body and a synthetic resin rigid holder, the cage main body 6 includes a cylindrical portion 7 provided with a pocket and one or both axial ends of the cylindrical portion 7. The holder 10 is formed between an annular surface 15 that comes into contact with the outer surface of the seven rank part 8 of the cage main body 6 and the inner diameter or outer diameter surface of the seven rank part 8. The ring portion 11 is formed with a fitting circumferential surface 17 that lightly contacts or fits with a gap.
The cylindrical roller 6 protrudes inward in the axial direction of the ring portion 11.
protrusions 12 located in the recesses 3a and 3b on the end face of the cylindrical roller B to prevent the cylindrical roller B from falling off; and claws 1 and 3 that lock the roller holder 10 to the seventh rank part 8 of the cage body 6. The roller retainer 10 is connected to the flange portion 8 of the retainer body B.
It is characterized by being constructed so that it can be assembled by being pushed in from the outside in the axial direction.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. In the same figure, reference numeral 1 indicates an outer ring having a collar at both ends of the raceway, 2 an inner ring having a collar at one end of the raceway, and 6 an inner ring having a collar at both ends of the raceway. A cylindrical roller having a recessed portion 3a in the center (see FIG. 2) and 4 indicate a cage of the present invention, respectively.

This cage 4 consists of a cage body 6 formed from a metal plate by press working, and a roller holder 1 formed from synthetic resin.
Consists of 0.

The cage main body 6 is formed by bending both axial ends of one cylindrical portion 7 inward in the radial direction to form a seven-rank portion 8.

Molded in a U-shaped cross section. The cylindrical portion 7 is provided with pockets separated by pillars that hold and guide the cylindrical rollers 3 at a required pitch (none of them are shown).

The holding body 10 includes a ring portion 11, a protrusion 12 that protrudes inward in the axial direction of the ring portion 11 to prevent the cylindrical roller 6 from falling off, and a claw portion 1 provided on the outer side of the protrusion 120 in the radial direction.
6 (see Figure 3).

The ring portion 11 is provided with an annular surface 150 that contacts the outer surface of the flange portion 8 of the retainer body 6, and a radially inner VC6 portion that forms a fitting circumferential surface 17 that fits with the inner diameter surface of the flange portion 8. has been done. The outer diameter dl of the ring part 11 is made slightly smaller than the outer diameter D1 of the cylindrical part 7 of the cage main body 60, and the inner diameter d2 is made smaller than the diameter of the pitch circle of the cylindrical roller B. 15 is in contact with almost the entire outer surface of the flange portion 8 of the cage body B.

In addition, the diameter (13) of the fitting peripheral surface 17 of the ring part 11 is slightly smaller than the inner diameter D2 of the flange part 8 of the cage main body 6, and the height H is made almost equal to the wall thickness of the flange part 8 to prevent stiffness. The body 10 is attached to the flange portion 8 of the retainer body 6 by the claw portion 16.
When the retainer body 10 is latched through the retainer body 6, a slight gap is created between the fitting circumferential surface 17 and the inner diameter surface of the flange portion 8 of the retainer body B, so that the retainer body 10 is This allows you to move in any direction.

The protrusion 12 has an axial length t equal to the length 11 between the end face of the cylindrical roller B and the annular surface 15 of the ring part 11 when the cylindrical roller 6 is assembled into the recess 6a of the cylindrical roller 6. The length t required to hold the inner peripheral surface without contacting the bottom surface of the
The width in the circumferential direction is appropriately selected taking into consideration the diameter of the recess 6a of the cylindrical roller 6, and the radial length of the axial end face is set to be equal to or smaller than the diameter of the recess 6a of the cylindrical roller 6. They are provided on the inner surface of the ring portion 11 in the direction of the shaft j at the same pitch as the cylindrical rollers 6, so that the end surfaces thereof are located approximately in the center of the recessed portions 6a of the cylindrical rollers 6.

On the radially outer side of this projection 12, there is a tapered surface 21 that is inclined outward in the @ direction with respect to the ring portion 11 from the axial end surface.
The claw portion 16 is formed such that the radially outer tip edge of the locking surface 210 protrudes radially outwardly than the edge of the fitting circumferential surface 17 of the ring portion 11. The diameter of the tip of the claw portion 16 (radially outer edge of the tapered surface 21) is more canine than the inner diameter T)2 of the flange portion 8 of the retainer body 6.
The diameter d5 of the rear end of the claw portion 16 (radially inner edge of the chimney surface 21) is smaller than the inner diameter D2 of the flange portion 8.

When assembling the cage 4 having the above structure into a bearing, after assembling the cage body 6 into the outer ring 1 and inserting the cylindrical rollers 6 into the pockets of the cage body B, the projections 12 of the roller holder 10 are
is placed inside, and when pushed in from the outside of the flange portion 8 of the cage body B, approximately aligned with the position of the recess 6a of the cylindrical roller 6,
The two surfaces 21 formed on the protrusion 12 act as guide surfaces, and the claws 13 contact the inner diameter surface of the flange 8 of the retainer body 6, are elastically deformed, and then restore to form a contact with the inner surface of the claws 16. The annular surface 15 of the ring part 11 and the flange part 8 of the cage body B
in contact with the inner and outer surfaces of the ring part 1, respectively.
The fitting circumferential surface 17 of the retainer body B is latched with a slight gap formed between it and the inner diameter surface of the flange portion 8 of the retainer body B. In this way, the latching counter-roller holder 10 is movable in the circumferential direction with respect to the cage body 6, so that the positioning with respect to the cage body 6 at the time of one push-in can be performed with strict precision. In addition, the diameter d5 of the radially inner edge of the tapered surface 21 formed on the radially outer side of the protrusion 120
is smaller than the inner diameter D2 of the flange portion 8 of the retainer body B, and the pushing operation is extremely easy.
Furthermore, after being latched, the diameter d4 of the tip of the claw portion 16 becomes the inner diameter D2 of the flange portion 8 of the retainer body 6.
Since the roller holder 10 is larger than the flange portion 8 of the cage main body 6, the roller holder 10 will not come out from the flange portion 8 of the cage main body 6.

Further, as mentioned above, a gap is formed between the fitting peripheral surface 17 of the ring portion 11 of the roller holder 10 and the inner diameter surface of the flange portion 8 of the cage main body 6. Temperature rise (Thus, even if the roller holder 10 expands, the roller holder 10 may bite into the flange portion 8 of the cage main body 607, and the movement of the roller holder 10 in the circumferential direction may be restricted.) There isn't.

In this way, when the outer ring 1 and the cylindrical rollers 6 are assembled together without being separated from each other by the cage 4 consisting of the cage body 6 and the cage holder 10, the cage 4 consisting of the cage body 6 and the cage holder 10
The protrusion 12 of the cylindrical roller 6 is placed inside the recess 3a of the cylindrical roller 6 and engages with the inner peripheral surface thereof.
will not fall off. Moreover, the ring portion 11 of the retainer 10 supports the weight of the cylindrical roller 6 that is received by the protruding portion 12 by increasing the area of the annular surface 15 that contacts the flange portion 8 of the retainer body 6. Even if the roller is a large cylindrical roller, the protrusion 12 is unlikely to be deformed.

FIG. 4 shows a modification of the embodiment shown in FIG. 1, in which cylindrical rollers 3
This figure shows a case in which the cage of the present invention is applied to a bearing having an annular recess 3b (FIG. 5) on both end faces of the bearing.

Outer ring of the bearing excluding the cylindrical rollers 6 1. Inner circle 2. Cage body 6
．． The structure of the roller holder 10 is basically the same as the embodiment shown in FIG. 1, so a detailed explanation will be omitted and the same parts will be denoted by the same reference numerals.

The protrusion 12 of the roller holder 10 is positioned radially inside the annular recess 6b of the first cylindrical roller B and engages with the inner circumferential surface of the annular recess 6b.
There is almost no need for positioning operations when hooking the retainer body 6 to the retainer body 6, and pushing can be performed extremely easily.

6 and 7 respectively show a second embodiment of the present invention and a modification thereof, in which the inner ring of the bearing and the cylindrical rollers are assembled integrally by a cage.

Cage body 6 in this case. The roller holder 10 is formed so that each of the constituent parts of the cage shown in FIGS. 1 and 4 is symmetrically outwardly in the radial direction with respect to the axial direction. Therefore, the holder 10 is fitted into the outer diameter surface of the seven rank portion 8 formed on the radially outer side of the holder main body 6. Therefore, the relationship between the outer diameter D3 of the flange portion 8 of the cage body 6, the diameter d3 of the fitting peripheral surface 17 of the ring portion 11 of the roller holder 1o, the diameter d4 of the tip of the claw portion 13, and the diameter dli of the rear end is determined. is as follows (
C becomes.

da < Da < ds da > D3 When assembling the cage shown in FIGS. 6 and 7 above into a bearing, the cage main body 6 is assembled into the inner ring 2, and the cylindrical rollers 6 are inserted into the pockets of the cage main body 6. After inserting the roller holder 10
When pushed in from the outside of the seventh rank portion 8 of the retainer body B in the axial direction, the claw portion 16 is latched onto the inner surface of the flange portion 8.

The seven run portions 8 of the cage main body A in each of the above embodiments are formed continuously in the circumferential direction of the cylindrical portion 70, and the claw portions 13 of the roller holder 10 are provided for each protrusion 12, but they are not necessarily provided. It is not necessary to do this, and the seven rank portions 8 of the cage body B may be formed discontinuously at intervals in the circumferential direction of the cylindrical portion 700.

The claw portions 13 of the roller holder 10 may also be provided partially for each protrusion at an arbitrary position. Therefore, the retainer can be latched to the retainer body not only by latching the entire protrusion to the continuous flange, but also by latching the claws provided on some of the protrusions to the continuous 7 flange. In some cases, all or part of the claws provided on all or part of the protrusion are latched to the discontinuous flange part.

Further, in each of the above embodiments, a tapered surface is formed on the slope of the protrusion of the roller holder, but this slope is not limited to a tapered surface, and may be a convex or concave curved surface, for example. Any surface may be formed as long as it provides less resistance when being pushed into the flange portion of the retainer body. Further, the outer diameter surface or the inner diameter surface extending from the axial end surface of the protrusion to the seventh rung side of the cage main body does not necessarily have to be a slope inclined with respect to the axial direction.

In addition, the ring part of the retainer does not need to be formed continuously in the circumferential direction, but it can be formed discontinuously by cutting out the part of the annular surface of the ring part that corresponds to the protrusion part for each protrusion part. may be formed. In this way, when molding the holder, the mold can be easily removed by simply pulling it in the axial direction (axial draw), which transforms it into a protrusion or claw.

It is possible to mold a highly precise holder without causing damage.

ζ et al. 1 In each of the above embodiments, the retainer is latched to the flanges on both ends of the retainer body having a U-shaped cross section. In addition, the retainer body is not limited to one with a U-shaped cross section, and a retainer body with an L-shaped cross section with a flange formed only on one end in the axial direction can also be used. As is clear from the above explanation, the cage of the present invention consists of a metal cage main body and a synthetic resin retainer body, and the inner diameter surface or outer diameter surface of the 7-run part of the cage main body is Since the holder is latched with a gap between the holder and the holder, strict precision is not required for positioning the holder during pushing, and the bearing can be easily assembled.

Furthermore, after the cage main body and the retainer of the present invention are assembled into a bearing, the ring portion and the claw portion of the roller retainer come into contact with both sides of the flange portion of the retainer body. Because they are in contact with each other, the protrusions that engage with the recesses of the cylindrical rollers are unlikely to be deformed by the weight of the cylindrical rollers during handling of the bearing, and while the bearing is rotating, the roller holder will not move in the axial direction. Since the movement of the roller retainer is prevented, it cannot be removed from the retainer body.Furthermore, the roller retainer lightly contacts the flange of the retainer body and is movable in the circumferential direction. When the four parts of the cylindrical roller come into contact with the protrusions of the roller holder, the protrusions move, which reduces the impact force on the protrusions and reduces the contact between the four cylindrical rollers and the one cylindrical roller. There is no inhibition of rotational performance due to contact, and chipping and deformation of the protrusion can be prevented.

Furthermore, in this invention, as in the embodiment.

When the cage body is pressed, it is not only possible to form it with high precision using a simple process.

Effects such as being lightweight and making it possible to manufacture a high-precision cage particularly suitable for use in high-load capacity cylindrical roller bearings at low cost can be obtained.

[Brief explanation of the drawing]

Figure 1 is the first example of this invention! FIG. 2 is a longitudinal sectional side view showing an example. 2 is a side view of the cylindrical roller shown in FIG. 1, FIG. 3 is a perspective view of the hanger holder, FIG. FIG. 6 is a side view of the cylindrical roller in the figure, FIG. 6 is a longitudinal side view showing the second embodiment of the invention, and FIG.
FIG. 7 is a vertical side view showing a modification of the embodiment. In the figure, the iFi outer ring, 2 is the inner ring, and 6 is a cylindrical roller. 3a and 3b are four parts of the cylindrical rollers, 4 is a cage, 6 is a cage main body, 7 is a cylindrical part, 8 is a flange part, 10 is a holder, 11 is a ring part, and 12 is a protrusion part. 16 is a claw portion, 15 is an annular surface, 17 is a fitting peripheral surface, and 21 is a tapered surface. Patent applicant NSK Co., Ltd. Agent Patent attorney Tetsu Mori, Ya Patent attorney
Masaru Shimizu, Patent Attorney, Masashi Shimizu, Director General of the Patent Office, November 6, 1981, Shima 1) Haruki, 1, Indication of Case, Patent Application No. 1983-126145, 2, Title of Invention: Cylindrical Roller Bearing Cage 3, Relationship with the case of the person making the amendment Patent Applicant NSK Ltd. 8 Sakae Patent Office Name (6698) Patent attorney Tetsuya Mori (
(2 others) 5. Date of amendment order 6. Number of inventions increased by amendment 7. Subject of amendment Claims column of the specification. 8. Contents of amendment +11 The scope of claims is amended as shown in the attached sheet. (2) In lines 6 to 9 of page 8 of the specification, ``In the assembled state...the length is added to the length'' is changed to ``In the assembled state, the length is the bottom surface of the recess 6a of the cylindrical roller 3.'' The length should be the length necessary to fit the inner circumferential surface without contact.'' (3) In the third line of page 14 of the specification, ``all or part of the claw'' is amended to read ``the deer''. (4) "Protrusions may be formed" in lines 17 and 18 of page 14 of the specification is corrected as follows. "The portions of the protrusion corresponding to the claws may be cut out in the shape of a window for each claw, or the outer periphery may be cut out to form a continuous or discontinuous portion." (5) Of the attached drawings. , 1st
Correct the diagram according to the attached sheet. Claims (1) A cage for a cylindrical roller bearing consisting of a metal cage main body and a synthetic resin rigid holder, wherein the cage main body includes a cylindrical portion provided with a pocket and an axial direction of the cylindrical portion. The retainer consists of a 7-rank portion formed on both ends or one end, and the retainer lightly contacts the annular surface that contacts the outer surface of the flange portion of the retainer body and the inner diameter surface or outer diameter surface of the flange portion. or a ring portion formed with a fitting circumferential surface that fits with a gap, and a protrusion that protrudes axially inward from the ring portion and is located within a recess in the end face of the cylindrical roller to prevent the cylindrical roller from falling off. and a claw portion for latching the roller holder to the flange portion of the cage body, and is configured such that the roller holder is assembled by being pushed from the outside in the axial direction of the flange portion of the cage body. Cage for cylindrical roller bearings. (2) The outer diameter surface or the inner diameter surface from the axial end surface of the protrusion of the roller holder to the flange side of the cage body is a slope inclined with respect to the axial direction, and the claw portion is provided through the slope. A cage for a cylindrical roller bearing according to claim 1. (3) The slope of the claw part of the roller holder is inclined axially outward or inward from the axial end surface of the protrusion relative to the ring part, corresponding to the inner flange part or outer 7 flange part of the cage body, respectively. It is formed as a tapered surface,
A claw portion of the holder is provided on the radially outer edge or inner edge of the tapered surface, and the diameter d+ (15) of the tip and rear end of the claw portion is relative to the inner diameter of the inner flange portion of the retainer body. The cage for a cylindrical roller bearing according to claim 2, wherein d4 > Ds > d5, and d4 < Ds < da with respect to the outer diameter D8 of the outer flange portion. (4) Cage main body The flange portion is discontinuously formed on the cylindrical portion of the holding body, and the protruding portion of the holding body is provided with a claw portion on the entire neck or a part of the protruding portion of the holding body.
Cage for cylindrical roller bearings as described in . (5) When the annular surface of the ring part of the roller holder is connected to the top of the claw part of the protrusion, Circle-1 according to any one of claims 2 to 4 which is formed unluckily
= Cage for cylindrical roller bearings. (6) The cage for a cylindrical roller bearing according to any one of claims 1 to 5, wherein the cage main body is a press-molded product made of a metal plate. 2-

Claims (6)

[Claims] (1) In a cylindrical roller bearing cage consisting of a metal cage main body and a synthetic resin rigid holder, the cage main body includes a cylindrical portion provided with a pocket and one or both axial ends of the cylindrical portion. It is formed on the side and consists of a friend flange part,
The retainer has an annular surface that comes into contact with the outer surface of the seventh rank portion of the retainer body, and a fitting circumferential surface that lightly contacts or fits with the inner diameter surface or outer diameter surface of the seven rank portion with a gap. a ring part, a protrusion part that protrudes axially inward of the ring part and is located in a recess in the end face of the first cylindrical roller to prevent the cylindrical roller from falling off, and a seventh rank part of the cage body. 1. A cage for a cylindrical roller bearing, characterized in that the roller holder is assembled by being pushed in from the outside in the axial direction of a flange portion of a cage main body. (2) The outer diameter surface or the inner diameter surface from the axial end surface of the protrusion of the roller holder to the 7th rank part side of the cage body is a slope inclined with respect to the axial direction, and the claw part is provided through the slope. A cage for a cylindrical roller bearing according to claim 1. (3) The slope of the claw portion of the roller holder is inclined axially outward or inward with respect to the ring portion of the axial end surface of the protrusion, corresponding to the inner 7 flange portion or outer flange portion of the cage body, respectively. The claws of the roller holder are provided on the radially outer edge or the inner edge of the cheek face.1 The diameters d4+d5 of the tips and rear ends of the claws are the inner side 7 of the retainer body. For the inner diameter D2 of the flange part, d4>D2>da, and for the outer diameter D3K of the outer flange part, da<Da<d
The cage for a cylindrical roller bearing according to claim 2, which is s. (4) The flange portion is discontinuously formed on the cylindrical portion of the cage main body, and the projection portion of the roller holder is provided with a claw portion in whole or in part. Cage for cylindrical roller bearings as described in . (5) Claims 2 to 4, in which the annular surface of the ring portion of the roller holder is formed discontinuously by cutting out portions corresponding to the projections. The cage for a cylindrical roller bearing according to any one of the above. (6) A cage for a cylindrical roller bearing according to any one of claims 1 to 5, wherein the cage main body is a molded product made of a metal plate.