JP2004346977A - Method of manufacturing rolling bearing-integrated one-way clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a rolling bearing-integrated one-way clutch capable of reducing cost by reducing a man-hour for inspection and a man-hour for management in production. <P>SOLUTION: An inner ring 1 and an outer ring 2 are machined so that a radial dimensional difference 2δ, 2Δ between raceway surfaces 1a, 2a for the rolling bearing and raceway surfaces 1b, 2b for a one-way clutch can be stored within a specified tolerance against predetermined dimensions. The inner and outer rings 1 and 2 are matched and assembled with each other so that such an initial radial clearance that the radial clearance of the rolling bearing becomes a set value in the state of fitting the inner and outer rings 1 and 2 to their mating members can be provided. Thus, a change in the dimensions of the raceway surfaces 1b and 2b for the one-way clutch according to the types of the mating members can be eliminated, and the man-hours for inspection and management can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a rolling bearing integrated one-way clutch in which a rolling bearing and a sprag type one-way clutch are integrated.
[0002]
[Prior art]
In a rolling bearing integrated one-way clutch in which a rolling bearing such as a ball bearing and a sprag type one-way clutch are integrated, generally, a partially cutaway front view is shown in FIG. 4, and FIG. As illustrated in the A sectional view, raceways 1a and 2a for rolling bearings are formed on the inner race 1 and the outer race 2, respectively, and a plurality of rolling elements 3 are arranged between the raceways 1a and 2a so as to freely roll. The one and outer races 2 have a structure in which raceway surfaces 1b and 2b for a one-way clutch are formed in parallel with raceway surfaces 1a and 2a for rolling bearings, respectively, and a plurality of sprags 4 are arranged therebetween. .
[0003]
In this example, the rolling elements 3 and the sprags 4 are arranged at a constant pitch in the circumferential direction in an annular space formed between the inner ring 1 and the outer ring 2 by a common retainer 5. The retainer 5 in this example has a structure in which two annular bodies 51 and 52 are engaged with each other in the axial direction to be integrated, and includes a pocket for the rolling element 3 and a pocket for the sprag 4. The sprags 4 are accommodated in these pockets and arranged at a constant pitch in the circumferential direction. Each sprag 4 is urged in the locking direction by a spring member 6 in which a plurality of spring pieces 6b are integrally formed on a ring-shaped base 6a (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2000-304068 (pages 2 to 4)
[0005]
[Problems to be solved by the invention]
By the way, if an appropriate clearance is not formed between each raceway surface of the inner ring and the outer ring and the outer peripheral surface of the rolling element, the rolling element does not roll as desired and may exhibit its performance. Can not. In particular, the radial gap, which is a gap in the radial direction, changes before and after assembly due to deformation caused by incorporating the inner ring and the outer ring into the mating member. Therefore, the gap at the time of manufacturing, the so-called initial gap, is the mating member of the inner ring or the outer ring. The radial dimension of the inner ring raceway surface and the radial dimension of the outer ring raceway surface are measured so as to be a value in anticipation of the deformation due to the fitting to the rotating shaft and the fitting and fixing to the axle box, respectively. The assembly is performed by performing a so-called matching operation of selecting the dimensions of the rolling elements to be incorporated according to the dimensions.
[0006]
On the other hand, in the sprag type one-way clutch, the J space, which is the radial dimension between the inner raceway surface and the outer raceway surface for the one-way clutch, is properly maintained, and the radial gap with respect to the sprag is optimally maintained. Without it, the ability cannot be fully demonstrated.
[0007]
In a rolling bearing-integrated one-way clutch in which a rolling bearing and a one-way clutch are integrated, the inner ring and the outer ring are usually assembled in a tight fit with the respective mating members, so that the inner ring expands in diameter. The outer ring is deformed in the direction in which the diameter is reduced, so that the J space is reduced correspondingly when the outer ring is assembled to the mating member. The amount of decrease in the J space differs depending on the fitting to the built-in mating member and the dimensional accuracy of the mating member.
[0008]
Therefore, in order to keep the J space after assembling optimally, in the conventional one-way clutch with a rolling bearing, FIGS. 6A and 6B show axially sectional views of the inner ring 1 and the outer ring 2 alone. As described above, the diameters ICD _i and OCD _i of the one-way clutch raceway surfaces 1b and 2b of the inner race 1 and the outer race 2 are individually managed independently of the diameters IBD and OBD of the respective rolling bearing raceway surfaces. , And a plurality of dimensions ICD _i (i = 1, 2, 3,...) And OCD _i (i = 1, 2, 3 ...).
[0009]
This leads to an increase in man-hours for inspection and management of dimensions at the time of manufacturing, and causes an increase in cost.
[0010]
SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has been made to manufacture a rolling bearing integrated one-way clutch capable of reducing inspection man-hours and management man-hours during manufacturing as compared with the related art, thereby achieving cost reduction. It is intended to provide a method.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a method of manufacturing a rolling bearing integrated type one-way clutch of the present invention includes a method for manufacturing a one-way clutch raceway surface between an inner ring and an outer ring in which a one-way clutch raceway surface is formed axially adjacent to the rolling bearing raceway surface. A method of manufacturing a rolling bearing integrated one-way clutch in which a plurality of rolling elements and sprags are arranged in an annular space, wherein the inner ring and the outer ring each have a rolling bearing raceway surface and a one-way clutch raceway surface. Radial dimensional differences were processed so as to fit within predetermined crossings with respect to the dimensions determined respectively, and the radial gap of the rolling bearing was set in a state where the inner ring and the outer ring were respectively fitted to the mating members. It is characterized by matching and assembling the inner ring and the outer ring so as to obtain an initial radial gap having a value (claim 1).
[0012]
Here, in the present invention, for the inner race and the outer race, a method of simultaneously grinding the raceway surface for a rolling bearing and the raceway surface for a one-way clutch by form grinding using a rotary dresser (claim 2) Can be suitably adopted. The present invention provides a one-way clutch for inner and outer rings by utilizing the fact that when the inner ring and the outer ring are assembled into the mating member, the dimensional change amount of the J space due to the mating member size substantially coincides with the gap change amount of the rolling bearing. Rather than managing the dimensions of the raceway surface, the inner and outer rings are machined so that the difference between the radial dimension of the rolling bearing raceway surface and the radial dimension of the one-way clutch raceway surface is set. By doing so, the intended purpose is to be achieved.
[0013]
That is, in the present invention, the inner race 1 is shown in FIG. 3A, which is a drawing of the embodiment, and the outer race 2 is shown in FIG. The difference between the diameters IBD and OBD of the surfaces 1a and 2a and the diameters ICD and OCD of the one-way clutch raceway surfaces 1b and 2b is a value determined respectively, in other words, δ (= (ICD -IBD) / 2) and Δ (= (OBD-OCD) / 2) are processed so that the steps are respectively determined values. By such processing, dimensions IBD and OBD of the rolling bearing raceway surfaces 1a and 2a are matched according to the ball meter Bd so that a required radial clearance is obtained after the inner ring 1 and the outer ring 2 are assembled into the mating member. If an appropriate initial radial gap is obtained by using this method, an appropriate initial J space can be obtained such that the J space has a required value after assembly.
[0014]
According to such a method, the J space after the inner ring and the outer ring have been assembled into the mating member has a diameter of Bd as the rolling element, and a radial clearance between the rolling bearing raceway surface and the ball rolling surface. Is Tr,
J space = Bd + Tr / 2− (δ + Δ) (1)
And it is not necessary to change the dimension of the one-way clutch raceway surface for each mating member.
[0015]
In order to easily realize machining of the inner ring and the outer ring such that the steps δ and Δ between the rolling bearing raceway surfaces 1a and 2a and the one-way clutch raceway surfaces 1b and 2b are made constant, claim 2 is provided. It is desirable to adopt form grinding using a rotary dresser as in the invention. According to such a form grinding, since the shape of the rotary dresser is transferred to the workpiece through the grinding wheel, δ and Δ are always constant irrespective of the cut by the grinding wheel.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this example, a method of manufacturing a rolling bearing integrated one-way clutch having the same structure as that shown in FIGS.
[0017]
FIG. 1 is an explanatory view of a method of grinding a raceway surface 1a for a rolling bearing and a raceway surface 1b for a one-way clutch of an inner ring 1 according to an embodiment of the present invention. It is explanatory drawing of the grinding method of the raceway surface 2a for rolling bearings, and the raceway surface 2b for one-way clutches.
[0018]
The inner race 1 and the outer race 2 are simultaneously ground on the raceway surfaces 1a, 2a for the rolling bearing and the raceway surfaces 1b, 2b for the one-way clutch by form grinding using the grinding wheels 102, 202 formed by the rotary dressers 101, 201, respectively. Is done.
[0019]
That is, a known outer surface grinding machine such as a microcentric machine is used for the grinding of the inner ring 1. As shown in FIG. 1A, the grinding wheel 102 is formed simultaneously with the dressing by a rotary dresser 101 having the same shape as the outer peripheral surface of the inner ring 1 after the grinding process. The outer peripheral surface of the inner ring 1 is formed into a negative shape. By providing a cut in such a formed state of the grindstone 102, as shown in FIG. 1B, both the rolling bearing raceway surface 1 a and the one-way clutch raceway surface 1 b are simultaneously formed on the outer peripheral surface of the inner ring 1. Be ground. Then, in the inner ring 1 after the grinding, as shown in FIG. 3A, the difference between the diameter IBD of the rolling bearing raceway surface 1a and the diameter ICD of the one-way clutch raceway surface 1b, in other words, δ in the figure Is always constant.
[0020]
Further, an inner surface grinding machine is used for processing the outer ring 2, and in this processing as well, the grinding wheel 202 has the same shape as the inner peripheral surface of the outer ring 2 after the grinding as shown in FIG. Is formed at the same time as the dressing by the rotary dresser 201 marked with a circle, whereby the outer peripheral surface of the grindstone 202 is formed into a negative shape of the inner peripheral surface of the outer ring 2. By providing a cut in such a formed state of the whetstone 202, as shown in FIG. 2B, both the rolling bearing raceway surface 2a and the one-way clutch raceway surface 2b are formed on the inner peripheral surface of the outer ring 2. Grinded at the same time. Then, in the outer ring 2 after the grinding, as shown in FIG. 3B, the difference between the diameter OBD of the rolling bearing raceway surface 2a and the diameter OCD of the one-way clutch raceway surface 2b, in other words, in the figure, The step indicated by Δ is always constant.
[0021]
As described above, the inner race 1 and the outer race 2 that have been ground using the rotary dresser are subjected to super-finishing of the rolling bearing raceway surfaces 1a and 2a, respectively, and then subjected to assembly. At the time of assembly, the rolling bearing raceway surfaces 1a and 2a of the inner ring 1 and the outer ring 2 are actually measured so that a required radial gap Tr is obtained after deformation due to the size of the mating member into which the inner ring 1 and the outer ring 2 are fitted. Select and assemble a combination that provides an initial radial gap that takes into account the minutes.
[0022]
According to the rolling bearing-integrated one-way clutch assembled by the above method, the J space of the one-way clutch after the inner ring 1 and the outer ring 2 are assembled into the mating member is as shown by the above-described formula (1), δ + Δ) is constant, and therefore is almost always constant.
[0023]
Therefore, according to this manufacturing method, the inspection and management of the dimensions of the one-way clutch raceway surfaces 1b, 2b are not substantially required for the inner race 1 and the outer race 2, and the dimensions of the raceway surfaces 1a, 2a for the rolling bearings are not required. It is only necessary to perform the management, and only by performing the matching as the rolling bearing, the J space of the one-way clutch as well as the radial gap of the rolling bearing becomes the designed value.
[0024]
In the above embodiments, the rolling bearing integrated one-way clutch in which the one-way clutch is provided on one side in the axial direction of the rolling bearing has been described, but the present invention provides one-way clutches on both axial sides of the rolling bearing. Of course, it is equally applicable to the arrangement.
[0025]
【The invention's effect】
As described above, according to the present invention, it is not necessary to manufacture a plurality of types of the one-way clutch raceway surface in accordance with the mating member on both the inner ring and the outer ring, and the dimensional inspection and management man-hour of the one-way clutch raceway surface are eliminated. Can be reduced, and cost reduction can be achieved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a method of grinding an outer peripheral surface of an inner ring 1 according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a method for grinding an inner peripheral surface of an outer race according to the embodiment of the present invention. It is an explanatory view of a grinding method of an inner skin of outer ring 2 of an embodiment of the present invention.
FIG. 3 shows dimensions of raceway surfaces 1a and 2a for rolling bearings after grinding of inner ring 1 (A) and outer ring 2 (B) of the embodiment of the present invention, and dimensions of raceway surfaces 1b and 2b for one-way clutch. FIG.
FIG. 4 is a partially cutaway front view showing a configuration example of a rolling bearing integrated type one-way clutch.
FIG. 5 is a sectional view taken along line AA of FIG. 6;
FIG. 6 is an explanatory view of a method of managing the dimensions of the raceway surface for the rolling bearing and the raceway surface for the one-way clutch of the inner race (A) and the outer race (B) of the conventional rolling bearing integrated one-way clutch.
[Explanation of symbols]
Reference Signs List 1 inner ring 1a rolling bearing raceway surface 1b one-way clutch raceway surface 2 outer ring 2a rolling bearing raceway surface 2b one-way clutch raceway surface 3 rolling element (ball)
4 Sprag 5 Cage 6 Spring member 101, 201 Rotary dresser 201, 202 Grinding wheel

Claims (2)

A rolling bearing integrated one-way clutch in which a plurality of rolling elements and sprags are arranged in an annular space between an inner ring and an outer ring in which a one-way clutch raceway surface is formed adjacent to a rolling bearing raceway surface in an axial direction. A method of manufacturing,
The inner ring and the outer ring are processed so that the radial dimensional difference between the raceway surface for the rolling bearing and the raceway surface for the one-way clutch falls within a predetermined intersection with respect to the dimension determined respectively, and the inner race and the outer race are processed. The inner ring and the outer ring are assembled and matched so as to obtain an initial radial gap such that the radial gap of the rolling bearing in a state in which each of the rolling bearings is fitted to a mating member is assembled. Manufacturing method of one-way clutch. The rolling bearing integrated type according to claim 1, wherein, for the inner ring and the outer ring, the respective rolling bearing raceway surfaces and the one-way clutch raceway surfaces are simultaneously ground by form grinding using a rotary dresser. Manufacturing method of one-way clutch.

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