JP6222286B2 - Method for manufacturing rolling bearing unit with mounting plate - Google Patents

Description

In order to rotatably support, for example, an end portion of a rotating shaft constituting an automobile transmission (manual transmission and automatic transmission) on an inner surface of a housing that houses components of the automobile transmission. using relates to an improvement of the mounting plate rolling bearing unit manufacturing method. Specifically, it is obtained by the invention to realize a manufacturing method manufactured by that get a good mounting plate rolling bearing unit at a low cost.

  As shown in FIG. 11, the end of the rotating shaft 1 such as a countershaft constituting an automobile transmission is rotatably supported on the inner surface of the housing 2 by a radial rolling bearing 3 such as a single row deep groove type ball bearing. doing. For this purpose, a circular holding recess 4 is provided on the inner surface of the housing 2, and the outer ring 5 constituting the radial rolling bearing 3 is fitted and fixed in the holding recess 4 by an interference fit. Further, the end portion of the rotary shaft 1 is fitted in the inner ring 6 constituting the radial rolling bearing 3 in a fitting state in which radial shakiness is suppressed, such as an interference fit. Further, in order to prevent the outer ring 5 from slipping out of the holding recess 4, the outer ring 5 is pressed toward the inner part of the holding recess 4 by a mounting plate 7 called a retainer plate.

  The radial rolling bearing 3 and the mounting plate 7 are, for example, as described in Patent Documents 1 to 3 and the like, and conventionally known as a rolling bearing unit 8 with a mounting plate as shown in FIGS. Assembling to the holding recess 4 is facilitated. This rolling bearing unit 8 with a mounting plate is externally fitted with the mounting plate 7 on a small diameter step portion 9 provided on the outer peripheral surface of one axial end portion of the outer ring 5 constituting the radial rolling bearing 3 so as to be rotatable with respect to the outer ring 5. It consists of Such a rolling bearing unit 8 with a mounting plate is fitted in the housing 2 with the outer ring 5 being fitted into the holding recess 4 with an interference fit, and one surface of the mounting plate 7 is abutted against the inner surface of the housing 2. Assemble to. Then, by rotating the mounting plate 7 with respect to the outer ring 5, mounting holes 10 and 10, which are screw holes or through-holes, formed on the outer diameter portion of the mounting plate 7 and the inner surface of the housing 2. The opened through hole or screw hole (not shown) is aligned. Next, screws or bolts inserted through the mounting holes 10 and 10 or the through holes on the housing 2 side are screwed into the screw holes or the mounting holes 10 and 10 and further tightened. As a result, the outer ring 5 can be supported and fixed in the holding recess 4 without rattling and in a state in which the outer ring 5 is prevented from coming out of the holding recess 4.

  In the rolling bearing unit 8 with a mounting plate as described above, the mounting plate 7 is coupled to the outer ring 5 so as to be rotatable and non-separable. The reason why the rotation is possible is that the outer ring 5 is fitted into the holding recess 4 so as to be fitted in a fitting state in which radial shakiness is prevented, and then each mounting hole 10 provided on the mounting plate 7 side. 10 and the through holes or screw holes provided on the housing 2 side are aligned. The reason for not separating is to facilitate handling of parts, assembling work, etc., so that the radial rolling bearing 3 and the mounting plate 7 can be handled as a unit.

  For such a purpose, in order to couple the outer ring 5 and the mounting plate 7 in a relatively rotatable and non-separable manner, in the case of the structure described in Patent Document 1, as shown in FIG. The engaging protrusions 11 formed at a plurality of positions in the circumferential direction on the inner peripheral edge of the outer periphery 7 are engaged with engaging grooves 12 provided on the outer peripheral surface of the small-diameter step portion 9 on the outer ring 5 side. In the case of the invention described in Patent Document 1 in order to engage each of the locking projections 11 and the locking groove 12, as shown in FIG. With the small-diameter stepped portion 9 fitted in the holding hole 13, as shown in FIG. 15B, the peripheral portion of the holding hole 13 is pressed in the axial direction in the mounting plate 7. The inner peripheral edge of the holding hole 13 is plastically deformed radially inward to form the locking projections 11. That is, simultaneously with the formation of the respective locking projections 11, the respective locking projections 11 are engaged with the locking grooves 12.

  Such a structure of the rolling bearing unit with a mounting plate and the manufacturing method thereof described in Patent Document 1 cannot stably engage the locking protrusions 11 and the locking grooves 12. There is a possibility that the cost increases due to the deterioration of the yield of the rolling bearing unit with mounting plate. This reason will be described with reference to FIG. The inner diameter of the holding hole 13 provided on the mounting plate 7 side needs to be slightly larger than the outer diameter of the small-diameter step portion 9 provided on the outer ring 5 side. The reason for this is to allow relative rotation between the mounting plate 7 and the outer ring 5 and to ensure concentricity between the mounting plate 7 and the outer ring 5. Accordingly, as shown in FIG. 16A, in a state where the small-diameter step portion 9 is fitted in the holding hole 13, between the inner peripheral surface of the holding hole 13 and the outer peripheral surface of the small-diameter step portion 9. The width dimension in the radial direction of the existing minute gap 14 becomes very small.

  From the state shown in FIG. 16A, in order to form a locking projection on the inner peripheral edge of the holding hole 13, as shown in FIG. The punch 15 is pressed against the peripheral portion of the holding hole 13 on the side surface. As a result, the plastically deformed portion of the inner peripheral edge of the holding hole 13 abuts against the portion of the small-diameter step portion 9 that is disengaged from the locking groove 12 at the distal end portion (axial end portion). As a result, harmful deformation in the direction of reducing the diameter occurs at the end of the outer ring 5 on the small diameter step 9 side, and the locking projections 11 {FIGS. 14 and 15 (B)]. Reference} and the locking groove 12 cannot be engaged with each other. If the inner diameter of the holding hole 13 is made sufficiently larger than the outer diameter of the small-diameter stepped portion 9, the locking projections 11 that are formed when the punch 15 is pressed are formed around the locking groove 12. It is possible to prevent the front ends (radially inner ends) of the respective locking projections 11 from hitting the outer peripheral surface of the small-diameter step portion 9 before reaching. However, in this case, the swinging amount (maximum eccentricity) of the mounting plate 7 with respect to the outer ring 5 increases. As a result, if each of the locking protrusions 11 is sufficiently high and the locking groove 12 is not deep enough, the engagement between the locking protrusions 11 and the locking groove 12 is easily released. Further, since the concentricity between the mounting plate 7 and the outer ring 5 is impaired, the work of screwing and fixing the mounting plate 7 to the housing 2 (see FIG. 11) becomes troublesome. Handleability is reduced.

  In Patent Document 3, a plurality of locking protrusions are formed on the peripheral edge of the holding hole provided in the mounting plate before the mounting plate and the outer ring are combined, and the mounting plate and the outer ring are respectively connected. A manufacturing method is described which is combined while elastically deforming. In the case of such a manufacturing method, instead of the problem described with reference to FIG. 16 described above, when the mounting plate and the outer ring are combined, there is a possibility that harmful deformation will occur in the outer ring.

  Furthermore, Patent Document 2 describes a structure in which a mounting plate and an outer ring are combined via a notched annular locking ring that is locked to the outer ring side. According to such a structure, instead of solving any of the above-mentioned problems, the number of parts increases, so that the parts manufacturing cost, parts management cost, and assembly cost all increase, and the production of the rolling bearing unit with a mounting plate is achieved. The increase in cost is inevitable.

JP 2008-267585 A JP 2009-030794 A JP 2009-036319 A

The present invention has been made in view of the circumstances as described above, it is obtained by the invention to realize a manufacturing method manufactured by that get a good mounting plate rolling bearing unit at a low cost.

Subject to mounting plate rolling bearing unit of the manufacturing method of the present invention includes an outer ring, an inner ring, a plurality of rolling elements, and a mounting plate.
Of these, the outer ring has an annular shape, the outer ring raceway on the inner peripheral surface, the small-diameter step portion at one axial end portion of the outer peripheral surface, and the base end portion of this small-diameter step portion and the axial intermediate portion of this outer peripheral surface. Step surfaces are provided between the entire circumference. Further, a locking groove that is longer in the circumferential direction is provided in a portion closer to the middle in the axial direction than one end portion in the axial direction of the outer peripheral surface of the small-diameter stepped portion. The locking grooves may be provided at a plurality of locations in the circumferential direction, but it is preferable to provide the locking grooves over the entire circumference in view of facilitating the manufacturing operation.
The inner ring is annular and is disposed on the inner diameter side of the outer ring concentrically with the outer ring, and an inner ring raceway is provided on the outer peripheral surface.
Each rolling element is provided between the outer ring raceway and the inner ring raceway so as to roll freely.

Further, the mounting plate includes at least one holding hole, a plurality of locking projections for each holding hole, and a plurality of mounting holes.
Of these, the holding hole has an inner diameter that is larger than the outer diameter of the small-diameter step portion and smaller than the outer diameter of a portion of the outer ring adjacent to the small-diameter step portion in the axial direction. And the large diameter part recessed in radial direction outward rather than the part adjacent to the circumferential direction is provided in the circumferential direction multiple places. Incidentally, each of these large-diameter portions may be Ru provided in a state which opens in the axial direction on both sides and the radially inner side.
Further, the respective locking projections are provided on the peripheral portions of the respective large diameter portions so as to protrude radially inward from the respective peripheral portions. Incidentally, each locking projection may be the Ru provided in a state protruding from the circumferential portion radially inward of the periphery of the large diameter portion. The diameter of the inscribed circle of each of the locking protrusions is smaller than the outer diameter of the one end portion in the axial direction of the small-diameter step portion and is equal to or larger than the diameter of the bottom portion of the locking groove.
And, while engaging each of the locking projections with the locking groove so as to enable relative rotation, by engaging the portion near the inner diameter of the axial side surface of the mounting plate and the step surface, The outer ring and the mounting plate are combined in a non-separable manner.
Each of the mounting holes is provided around the holding hole, and the diameter of the inscribed circle of each of the mounting holes is larger than the outer diameter of the outer ring.

When carrying out the method of manufacturing a mounting plate rolling bearing unit of the present invention, specifically, the large-diameter portion and the locking projection, provided at three or more positions in the circumferential direction at equal intervals.
In addition , the locking groove can be provided over the entire circumference of the outer peripheral surface of the small-diameter step portion, except for one end portion in the axial direction, up to the base end portion of the step surface. .
Alternatively, the pre Kigakaritome groove, the axially intermediate portion of the outer peripheral surface of the cylindrical portion, can be provided over the entire circumference.

Further, when performing the mounting plate rolling bearing unit manufacturing method of the present invention, preferably, among the inner circumferential edge of the holding hole, the portion where the phase in the circumferential direction coincides with the mounting holes, respectively A notch that is long in the circumferential direction and has a circumscribed circle diameter larger than the outer diameter of the outer ring is formed.
Further, when practicing the present invention, For example, providing the retaining hole only one. Then, the outer ring and the mounting plate are combined so as to allow relative rotation.
Alternatively, a plurality of the holding holes are provided. And the said outer ring | wheel and the said mounting plate are combined so that the relative displacement regarding the radial direction of each of these holding holes is possible.

The manufacturing how the mounting plate rolling bearing unit of the present invention, at the same time forms a locking projection in the circumferential direction a plurality of locations of the mounting plate, comprising the step of combining the outer ring and the mounting plate.
In the case of the invention described in claim 1 , in the step, the small diameter step portion of the outer ring is fitted in the holding hole of the mounting plate, and the one of the other side surfaces in the axial direction of the mounting plate. The punches are abutted against the peripheral portions of the respective large diameter portions, and the respective punches are pressed toward the step surface, so that the portions abutting the punches are plastically deformed inward in the radial direction, and the respective engagements are performed. At the same time when the stop protrusions are formed, these locking protrusions are engaged with the locking grooves.
On the other hand, in the case of the invention described in claim 2 , each of the large-diameter portions among the other side surfaces in the axial direction of the mounting plate in a state where the small-diameter step portion of the outer ring is fitted in the holding hole of the mounting plate. A wedge-shaped first punch with a sharpened tip edge is pressed against the peripheral portion of the. And in the peripheral part of each of these large diameter parts, the width dimension regarding the radial direction of the opening part on the other side in the axial direction of the mounting plate is wide, and this width dimension becomes narrower toward the back part. At the same time, the radially inner portion of each concave groove is plastically deformed radially inward. Thereafter, the second punch is pushed into each of the concave grooves, and the portion located on the inner diameter side of each of the concave grooves around the large diameter portion is further plastically deformed inward in the radial direction so that each of the locking protrusions. At the same time as forming the portions, the locking protrusions and the locking grooves are engaged. The tip surface of the second punch is not sharp like the first punch, but is a wide surface.

When implementing the manufacturing method of the rolling bearing unit with a mounting plate of the present invention as described above, preferably, the peripheral portion of each large-diameter portion is a diameter in the mounting plate as in the invention described in claim 3. When plastically deforming inward in the direction, a holding jig is disposed around the outer ring so as to surround the outer ring. And by supporting the radial direction intermediate part of the axial direction one side surface of the said mounting plate with this holding jig, it can prevent that a processing load is added to the said outer ring | wheel.

According to the manufacturing method of the mounting plate rolling bearing unit of the present invention constructed as described above, the resulting quality of the mounting plate rolling bearing unit at a low cost. The reason will be described below.
First of all, it is a structure that directly combines the outer ring of the rolling bearing and the mounting plate without using separate parts such as a locking ring. Can be realized.

In addition, at the same time as forming the locking projections at a plurality of positions in the circumferential direction of the inner peripheral edge of the mounting plate, the locking projections and the locking grooves on the outer ring side are engaged with each other in the above-mentioned patent document. As in the prior art described in No. 3, when the outer ring and the mounting plate are combined, no harmful deformation occurs in the outer ring. Each of the locking projections is formed by plastically deforming a portion corresponding to a plurality of large-diameter portions among the inner peripheral edge portions of the holding holes formed in the mounting plate inward in the radial direction. For this reason, during the processing of the locking projections, the tips of the locking projections do not hit the portions of the outer peripheral surface of the small-diameter stepped portion that are out of the locking grooves. The stop protrusion does not strongly press the outer peripheral surface of the small diameter step portion radially inward. As a result, when the outer ring and the mounting plate are combined, no harmful force acts on any part, and it is possible to prevent these parts from being harmfully deformed, thereby improving the yield.
Further, the inner peripheral surface of the holding hole and the outer peripheral surface of the small-diameter stepped portion are opposed to each other except for each large-diameter portion through a minute gap. Accordingly, the swinging amount (maximum eccentricity) of the mounting plate with respect to the outer ring can be suppressed to a small extent (concentricity between the outer ring and the mounting plate can be ensured).
Accordingly, a high-quality rolling bearing unit with a mounting plate can be obtained at low cost.

The orthographic view which looked at the rolling bearing unit with a mounting plate from the side which installed the mounting plate which shows the 1st example of embodiment of this invention. The fragmentary perspective view shown in the state cut | disconnected by the XX line part of FIG. FIG. 3 is an orthographic view of the mounting plate before being combined with the outer ring taken from the same direction as FIG. 1. Sectional drawing which shows the process of combining this mounting plate and an outer ring | wheel simultaneously in order to form a latching protrusion on a mounting plate. The figure similar to FIG. 4 which shows the 2nd example of embodiment of this invention. The fragmentary sectional view which shows the 3rd example. For explaining the fourth example, with respect to the upper stage (A) representing the present embodiment and the lower stage (B) representing a state in which the present embodiment is not adopted, each of the mounting plates is viewed from the same direction as FIG. The diagram (a) and a diagram (b) showing a situation in which the roundness of the outer ring fitted in the holding hole of the mounting plate deteriorates as the bolt inserted through the mounting hole of the mounting plate is inserted. Sectional drawing of the screwing fixing | fixed part of the attachment plate with respect to a housing for demonstrating the reason for the roundness of an outer ring | wheel worsening with bolt fastening. The figure which took out the attachment plate and showed it from the same direction as FIG. 3 which shows the 5th example of embodiment of this invention. Sectional drawing which shows the assembly | attachment state of the rolling bearing unit with a mounting plate of this example. The fragmentary sectional view which shows an example of the assembly | attachment state of a rolling bearing unit with a mounting plate. The perspective view which shows the 1st example of the conventional structure of a rolling bearing unit with a mounting plate. FIG. The fragmentary sectional view which shows the 2nd example of the conventional structure of a rolling bearing unit with a mounting plate. The fragmentary sectional view which shows the assembly process of the 2nd example of this conventional structure in order of a process. The fragmentary sectional view for demonstrating the problem which arises in the assembly process of this conventional structure.

[First example of embodiment]
1 to 4 show a first example of an embodiment of the present invention. The rolling bearing unit 8a with the mounting plate of this example includes a radial rolling bearing 3 (see FIGS. 11 to 14; only the outer ring 5a is shown in FIGS. 1, 2 and 4) and the mounting plate 7a in a non-separable manner, and Combining relative rotation possible. As the radial rolling bearing 3, it is preferable to use a single row deep groove type ball bearing. The reason for this is that the dynamic torque is small and the constituent members are not inadvertently separated even before being assembled to the rotation support portion. The radial rolling bearing 3 has the same structure as that which has been widely known so far, and the description thereof will be omitted or simplified. The following description focuses on the structure of the combination part of the outer ring 5a and the mounting plate 7a of the radial rolling bearing 3, the assembling method thereof, and the part that has not been described previously, which is a characteristic part of this example. To do.

  The outer ring 5a is made of a hard metal, such as bearing steel, in an annular shape as a whole. A single row deep groove type outer ring raceway 16 is provided at an axially intermediate portion of the inner peripheral surface, and seal rings 17, 17 are also provided at both ends. Locking grooves 18 and 18 for locking the outer peripheral edge (see FIG. 14) are formed over the entire circumference. A small-diameter step 9a is formed on one end of the outer peripheral surface of the outer ring 5a in the axial direction (the left end in FIGS. 2 and 4) concentrically with the rest of the outer peripheral surface over the entire periphery. ing. A portion between the base end portion of the small-diameter step portion 9a and the axially intermediate portion of the outer peripheral surface is a step surface 19 that exists in a direction perpendicular to the central axis of the outer ring 5a. Further, a locking groove 12a is provided over the entire circumference in a portion closer to the middle in the axial direction than one end portion in the axial direction of the outer peripheral surface of the small diameter step portion 9a. Accordingly, a bank-like locking ridge 20 is provided over the entire circumference at the tip of the small-diameter step 9a, that is, between the locking groove 12a and the tip of the small-diameter step 9a. Provided.

  On the other hand, the mounting plate 7a is formed in a substantially hexagonal shape or a knot-like shape by cutting a top portion of an equilateral triangle into a partial arc shape by a plastically deformable metal plate such as a mild steel plate. One holding hole 13a provided, locking projections 11a, 11a provided at three circumferentially spaced positions, and mounting holes 10a, 10a provided at three circumferentially spaced positions. . The thickness T of the mounting plate 7a is substantially the same as the length L of the small-diameter step portion 9a (T≈L), and is larger than the width W of the locking groove 12a (T> W).

Further, the inner diameter (the large-diameter portion the inner diameter of the portion deviated in the circumferential direction from the 21, _{21) R 13} in the retaining hole 13a is slightly greater than the outer diameter _{d 9} of the cylindrical portion 9a (the engaging protruding portion 20) The outer ring 5a is smaller than the outer diameter D of the portion adjacent to the small-diameter step portion 9a in the axial direction (d ₉ <R ₁₃ <D). And the notch-shaped large diameter parts 21 and 21 are formed in three places of the circumferential direction equal intervals of the said holding | maintenance hole 13a in the state dented radially outward rather than the part adjacent to the circumferential direction. .

  Each of the locking projections 11a and 11a plastically deforms the metal material (soft steel) constituting the mounting plate 7a at a substantially central position in the circumferential direction at the peripheral edge of each of the large diameter portions 21 and 21. Thus, the large-diameter portions 21 and 21 are provided so as to protrude radially inward from the peripheral portions of the large-diameter portions 21 and 21. The diameter of the inscribed circle of each of the locking protrusions 11a, 11a is smaller than the outer diameter of the locking protrusion 20 provided at one axial end of the small diameter step 9a, and the locking protrusion It is equal to or larger than the diameter of the bottom of the concave groove 12a (preferably larger than this diameter).

  The outer ring 5a provided with the small-diameter step portion 9a (the locking projection 20 and the locking groove 12a) as described above, and the large-diameter portions 21 and 21 and the locking projections 11a and 11a as described above are provided. The mounting plate 7a is combined with each of the locking protrusions 11a, 11a and the locking groove 12a so as to be non-separable and relatively rotatable. That is, the locking protrusions 11a and 11a are engaged with the locking grooves 12a so as to be capable of relative rotation, and the inner diameter of one side surface (right side surface in FIGS. 2 and 4) of the mounting plate 7a. The shift portion and the step surface 19 are engaged. In this state, the mounting plate 7a is prevented from being displaced to the left in FIG. 2 with respect to the outer ring 5a by the engagement of the locking projections 11a, 11a and the locking projection 20. The On the other hand, the displacement to the right in FIG. Further, the outer ring 5a can be held down by the mounting plate 7a. With respect to the axial direction of the mounting plate 7a and the outer ring 5a, the thickness of the locking projections 11a and 11a is smaller than the width of the locking groove 12a. Further, in a state where the outer ring 5a and the mounting plate 7a are arranged concentrically, between the tips (radially inner ends) of the respective locking projections 11a and 11a and the bottom surface of the locking groove 12a. There are minute gaps. Accordingly, the outer ring 5a and the mounting plate 7a are combined in a non-separable manner and capable of relative rotation.

  The mounting holes 10a and 10a are provided at three positions at equal intervals in the circumferential direction around the holding hole 13a. The diameters of the inscribed circles of the mounting holes 10a and 10a are larger than the outer diameter of the outer ring 5a. Accordingly, the bolts, studs, etc. inserted through the mounting holes 10a, 10a do not interfere with a part of the outer ring 5a.

The operation of combining the mounting plate 7a with the outer ring 5a is performed as follows, and at the same time the locking projections 11a and 11a are formed at a plurality of locations in the circumferential direction of the mounting plate 7a. 7a and the outer ring 5a are combined in a non-separable manner.
Therefore, in the case of this example, first, as shown in FIG. 4A, the small diameter step portion 9a of the outer ring 5a is fitted into the holding hole 13a of the mounting plate 7a. Further, in this state, the support surface of the holding jig 22 is brought into contact with a portion (diameter intermediate portion) that exists radially outward from the outer ring 5a on one axial side surface of the mounting plate 7a. . The step surface 19 of the outer ring 5a and the one axial side surface of the mounting plate 7a are slightly separated from each other, and a thrust load applied to the mounting plate 7a during the processing of the locking projections 11a and 11a is caused by the outer ring. Do not join 5a.

  Next, as shown in FIG. 4B, a part of the other side surface in the axial direction of the mounting plate 7a (the left side surface in FIGS. The front end surface of the punch 23 provided with protrusions at three positions at equal intervals in the direction is abutted. At this time, with respect to the radial direction of the mounting plate 7 a, the inner diameter side edge of the punch 23 is projected inward in the radial direction from the peripheral edge of each of the large diameter portions 21 and 21. From this state, the punch 23 is pressed toward the stepped surface 19, and the peripheral portions of the large diameter portions 21, 21 are strongly pressed in the mounting plate 7 a. Then, as shown in FIG. 4 (B) → (C), the metal material existing in the peripheral portion of each of the large diameter portions 21 and 21 is moved radially inward (the peripheral portion is radially inward). By forming the locking projections 11a and 11a, the locking projections 11a and 11a and the locking groove 12a are engaged with each other.

Since all or most of the processing load applied to the mounting plate 7a during the processing of the locking projections 11a, 11a is supported by the holding jig 22 and does not add to the outer ring 5a, the outer ring 5a Even if the strength and rigidity of the outer ring 5a are not particularly large, the outer ring 5a is not damaged such as deformation. As a result of forming the locking projections 11a and 11a as described above, the outer ring 5a and the mounting plate 7a are combined in a non-separable manner and capable of relative rotation as described above. Also, among the holding hole 13a, the inner diameter R ₁₃ of the portion deviated from the large diameter portion 21 and 21, as described above, only it is slightly larger than the outer diameter d ₉ of the cylindrical portion 9a Therefore, the outer ring 5a and the mounting plate 7a are rarely shaken in the radial direction when they are combined with each other. In addition, since the processing of each of the locking projections 11a and 11a is performed in a state where only the outer ring 5a and the mounting plate 7a are combined, it is easy to handle and other components of the radial rolling bearing 3 There is no possibility of hurting.

As described above, each of the locking projections 11a and 11a is formed by plastically deforming the peripheral edge of each of the large diameter portions 21 and 21 radially inward. The inner diameter is greater than the outer diameter of the locking protrusion 20 by at least the radial height h ₂₁ minutes of the stepped portion. Therefore, the diameter of the inscribed circle of each of the locking projections 11a and 11a is smaller than the outer diameter of the locking projection 20 is that in the middle of (B) → (C) in FIG. It is after the state in which the processing of each locking projection 11a, 11a has progressed to some extent. Therefore, if the relationship between the radial height h _{21 of the} stepped portion and the axial width W ₂₀ of the locking ridge portion 20 is appropriately restricted, each locking shown in FIG. At the stage of processing the protrusions 11a and 11b, the tips of the locking protrusions 11a and 11a and the outer peripheral surface of the locking protrusion 20 do not hit each other as shown in FIG. Further, in the state where the processing of the respective locking projections 11a and 11a shown in FIG. 4C is completed, the diameter of the inscribed circle of each of the locking projections 11a and 11a is set to the above-mentioned locking projection portion. It can be made sufficiently smaller than the outer diameter of 20.

As described above , in this example, since the outer ring 5a and the mounting plate 7a are directly combined, it is possible to reduce the cost by suppressing the component manufacturing cost, the component management cost, and the assembly cost.
Further, when engaging the locking protrusions 11a, 11a on the inner peripheral edge of the mounting plate 7a with the locking groove 12a formed on the outer peripheral surface of the small-diameter step 9a of the outer ring 5a, any step is performed. However, a force directed radially inward is not applied to the small-diameter step portion 9a. For this reason, no harmful deformation occurs in the outer ring 5a, it is difficult for defective products to be generated, and the yield of the rolling bearing unit with mounting plate can be improved.
Further, since the amount of swinging of the mounting plate 7a with respect to the outer ring 5a can be suppressed to a small extent, it is easy to screw and fix the mounting plate 7a to the housing 2 (see FIG. 11). Can be improved.
Accordingly, a high-quality rolling bearing unit with a mounting plate can be obtained at low cost.

[Second Example of Embodiment]
FIG. 5 shows a second example of the embodiment of the present invention. In the case of this example, the operation of forming the locking projection 11b on the peripheral edge portion of each large-diameter portion 21 in the holding hole 13a of the mounting plate 7a is performed in two stages.

  That is, in the case of this example, first, as shown in FIG. 5 (A), the tip edge is sharpened around the large-diameter portion 21 in the other axial side surface of the mounting plate 7a. The wedge-shaped first punch 26 is pressed. And as shown to (B) of FIG. 5, the width dimension regarding the radial direction of the opening part of the axial direction other surface side of the said mounting plate 7a is wide in the peripheral part of each said large diameter part 21, and goes to the inner part. As a result, the V-shaped groove 27 whose width dimension becomes narrower is formed. At the same time, the inner locking projections 28 are formed by plastically deforming radially inner portions of these concave grooves 27 radially inward.

  Thereafter, after the first punch 26 is extracted from each of the concave grooves 27, as shown in (C) → (D) of FIG. The punch 29 is pushed in, so that each of the element locking projections 28, which is a portion located on the inner diameter side of each of the concave grooves 27 around the large diameter portion 21, is further plastically deformed radially inward. Then, simultaneously with the formation of the respective locking projections 11b, the respective locking projections 11b are engaged with the locking grooves 12a provided on the outer ring 5a side.

In the case of this example, the processing of each of the locking projections 11b is performed in two stages including the step of using the wedge-shaped first punch 26. The load applied to 7a can be reduced. For this reason, the holding jig 22 (see FIG. 4) as used in the first example can be omitted.
The other parts are the same as those in the first example of the above-described embodiment, and thus overlapping illustrations and descriptions are omitted.

[Third example of embodiment]
FIG. 6 shows a third example of the embodiment of the present invention. In the case of this example, a locking groove 12b is provided over the entire circumference in the axially intermediate portion of the outer peripheral surface of the small diameter step portion 9b provided on the outer ring 5b side.
With such a configuration, the radial thickness of the base end portion of the small diameter step portion 9b is secured, and the strength and rigidity of the portion where the small diameter step portion 9b is formed at the axial end portion of the outer ring 5b are improved. I am trying.
About other parts, since it is the same as that of the 1st example of embodiment mentioned above including the processing method of each latching protrusion 11b, or the 2nd example of embodiment mentioned above, it overlaps. The description is omitted.

[Fourth Example of Embodiment]
(A)-(a) of the upper stage of FIG. 7 is a schematic diagram for explaining a fourth example of the embodiment of the present invention. In the case of this example, in the inner peripheral edge of the holding hole 13b provided in the central portion of the mounting plate 7b, a portion having a circumferential phase that coincides with each of the mounting holes 10b and 10b is cut long in the circumferential direction. 30 and 30 are formed. The diameters of the circumscribed circles of these notches 30 and 30 are larger than the outer diameter of the outer ring 5a (see FIG. 8). Therefore, the side surface in the axial direction of the mounting plate 7b and the step surface 19 (see FIG. 8) present on the outer peripheral surface of the outer ring 5a abut only at the portion between the notches 30, 30. There is no contact between the notches 30 and 30. That is, the portion closer to the inner diameter of one side surface in the axial direction of the mounting plate 7b and the stepped surface 19 are engaged only at portions where the phase in the circumferential direction is different from the mounting holes 10b and 10b. When the structure of this example is implemented, a plurality of large-diameter portions and locking projections (not shown) provided on the inner peripheral edge of the holding hole 13b are separated from the notches 30, 30 in the circumferential direction. To form the part. Alternatively, if the amount of plastic deformation at the time of forming the locking projection can be ensured, each of the notches 30 and 30 can be used as a large diameter portion.

  In the case of this example, by providing the mounting plate 7b with the notches 30 and 30 as described above, a plurality of circumferential locations (three locations in the illustrated example) of the mounting plate 7b are provided with respect to the housing 2a. The deterioration of the roundness of the outer ring 5a associated with the coupling and fixing by the bolts 31 (see FIG. 8) can be suppressed. Hereinafter, in addition to FIG. 7A, FIG. 7B and FIG. 8 show the reason why the roundness of the outer ring 5a can be prevented by providing the notches 30 and 30. Will be described with reference to FIG.

  In order to assemble the outer ring 5a to the housing 2a, the outer ring 5a is fitted into the holding recess 4a of the housing 2a, and the axial end surface of the outer ring 5a is abutted against the inner end surface of the holding recess 4a. Further, a portion closer to the inner diameter of one side surface (right side surface in FIG. 8) of the mounting plate 7b is brought into contact with a step surface 19 formed on the outer peripheral surface of the outer ring 5a. In this state, a gap δ exists between one axial surface of the housing 2a (left side surface in FIG. 8) and one axial surface of the mounting plate 7b. This gap δ is necessary to support the outer ring 5a with respect to the housing 2a without rattling based on the tightening of the bolts 31.

  The gap δ is eliminated by inserting the through holes 32 provided in the housing 2a and tightening the bolts 31 screwed into the mounting holes 10b and 10b. At this time, the step surface 19 is pushed by a portion near the inner diameter of one surface of the mounting plate 7b in the axial direction, but the force pushing the step surface 19 is not uniform in the circumferential direction. For example, as shown in FIGS. 7B to 7A, when a mounting plate 7a having a simple circular holding hole 13a is used, the phase in the circumferential direction matches the mounting holes 10a and 10a. The force that pushes the stepped surface 19 is particularly strong in the portions marked with black circles in FIGS. 7B and 7A, which are close to the mounting holes 10a and 10a, as compared with the other portions. As a result, the roundness of the outer ring 5a having the step surface 19 is deteriorated as shown in FIGS. The deterioration of the roundness of the outer ring 5a may lead to deterioration of acoustic characteristics and durability of the radial rolling bearing 3 (see FIGS. 13 to 14) incorporating the outer ring 5a.

On the other hand, according to the structure of this example shown in FIGS. 7A to 7A, the portion closer to the inner diameter of the side surface in the axial direction of the mounting plate 7b based on the presence of the notches 30,30. However, the stepped surface 19 is strongly pressed at a portion separated from each mounting hole 10b, 10b in the circumferential direction, which is indicated by a black circle in FIGS. Moreover, the location which presses strongly becomes twice (6 places) of each of these attachment holes 10b and 10b. As a result, the distribution of the force with which the stepped surface 19 is pressed becomes nearly uniform, and the deterioration of the roundness of the outer ring 5a associated with the tightening of the bolts 31 is alleviated. As a result, as shown in FIGS. 7A to 7B, even when the bolts 31 are tightened and the outer ring 5a is fixed to the housing 2a, deterioration of the roundness of the outer ring 5a can be suppressed. Thus, deterioration of the acoustic characteristics and durability of the radial rolling bearing 3 incorporating the outer ring 5a can be prevented.
In addition, regarding the combination of the mounting plate 7b and the outer ring 5a, any one of the first to third examples of the above-described embodiment can be adopted, and thus overlapping illustrations and descriptions are omitted.

[Fifth Example of Embodiment]
9 to 10 show a fifth example of the embodiment of the present invention. In the case of this example, a plurality of (two in the illustrated example) holding holes 13c and 13c are provided in one mounting plate 7c. The outer rings 5a and 5a are assembled inside the holding holes 13c and 13c, respectively, so that the relative displacement in the radial direction of the holding holes 13c and 13c is possible. The radial rolling bearings 3 and 3 including the outer rings 5a and 5a respectively support the end portions of the separate rotating shafts 1a and 1b with respect to the housing 2b so as to be rotatable.

In the case of the structure of this example, the mounting plate 7c cannot be rotated with respect to the outer rings 5a and 5a, but the pitch between the holding holes 13c and 13c and the housing 2b are provided. Further, it is possible to absorb a deviation from the pitch between the holding recesses 4b and 4b. That is, since the outer rings 5a and 5a are fitted into the holding recesses 4b and 4b without rattling (for example, with a light interference fit), the outer rings 5a and 5a are placed inside the holding holes 13c and 13c. If the relative displacement in the radial direction is assembled so as to be impossible, the two pitches must be matched exactly. On the other hand, as shown in the first to third examples of the above-described embodiment, the structure of the present invention can not only rotatably hold the outer ring on the inner diameter side of the holding hole, but can also have a slight relative relative to the radial direction. Displacement can also be made possible. For this reason, by using the structure of the present invention, it is not necessary to make these two pitches strictly coincide with each other, the manufacturing cost can be reduced, and the outer ring 5a, 5a can be assembled to the holding recesses 4b, 4b. Can be simplified.
Even in the present example, regarding the combination of the mounting plate 7c and the outer ring 5a, any one of the first to third examples of the above-described embodiment can be adopted, and therefore overlapping illustrations and descriptions are omitted. .

  When practicing the present invention, if the strength and rigidity in the axial direction of the outer ring to which the mounting plate is to be assembled are sufficiently high, each locking projection is formed in one step as shown in FIG. Even in such a case, it is not always necessary to use a holding jig when processing each of the locking protrusions. That is, each of the locking protrusions can be formed in a state in which the end surface on the opposite side of the axially opposite end surfaces of the outer ring is in contact with the support surface of the receiving tool. . Conversely, as shown in FIG. 5 described above, even when each locking projection is performed in two stages, the use of a restraining jig can more reliably prevent deformation of the outer ring.

1, 1a, 1b Rotating shaft 2, 2a Housing 3 Radial rolling bearing 4, 4a, 4b Holding recess 5, 5a, 5b Outer ring 6 Inner ring 7, 7a, 7b, 7c Mounting plate 8, 8a Rolling bearing unit with mounting plate 9, 9a , 9b Small diameter step 10, 10a, 10b Mounting hole 11, 11a, 11b Locking protrusion 12, 12a, 12b Locking groove 13, 13a, 13b, 13c Holding hole 14 Micro gap 15 Punch 16 Outer ring raceway 17 Seal ring 18 Locking groove 19 Stepped surface 20 Locking protrusion 21 Large diameter portion 22 Holding jig 23 Punch 24 Ball 25 Cage 26 First punch 27 Recessed groove 28 Element locking protrusion 29 Second punch 30 Notch 31 Bolt 32 through holes

Claims (3)

An outer ring, an inner ring, a plurality of rolling elements, and a mounting plate;
Of these, the outer ring is annular, the outer ring raceway is on the inner peripheral surface, the small-diameter step portion is at one axial end portion of the outer peripheral surface, and the base end portion of the small-diameter step portion and the axial intermediate portion of the outer peripheral surface are Stepped surfaces are provided over the entire circumference, and a locking groove that is longer in the circumferential direction at a portion closer to the middle in the axial direction than one axial end portion of the outer circumferential surface of the small-diameter stepped portion. Is provided,
The inner ring is annular and is arranged concentrically with the outer ring on the inner diameter side of the outer ring, and an inner ring raceway is provided on the outer peripheral surface.
Each of the rolling elements is provided so as to be freely rollable between the outer ring raceway and the inner ring raceway,
The mounting plate is provided with at least one holding hole, a plurality of locking projections for each holding hole, and a plurality of mounting holes.
Of these, the holding hole has an inner diameter that is larger than the outer diameter of the small-diameter stepped portion and smaller than the outer diameter of the outer ring adjacent to the small-diameter stepped portion in the axial direction. The large-diameter portion that is recessed radially outward than the portion adjacent in the circumferential direction is provided,
Each of the locking projections is provided on the peripheral edge of each of the large diameter portions in a state of projecting radially inward from each of the peripheral portions, and the diameter of the inscribed circle of each of the locking projections Is smaller than the outer diameter of one end portion in the axial direction of the small-diameter step portion, and is equal to or larger than the diameter of the bottom portion of the locking groove.
Each of the locking protrusions engages with the locking groove so as to be capable of relative rotation, and a portion closer to the inner diameter of one side surface in the axial direction of the mounting plate engages with the step surface, whereby the outer ring And this mounting plate are combined in a non-separable manner,
Each of the mounting holes is provided around the holding hole, and the diameter of the inscribed circle of each of the mounting holes is larger than the outer diameter of the outer ring.
With the small-diameter step portion of the outer ring fitted in the holding hole of the mounting plate, the punch is abutted against the peripheral portion of each large-diameter portion of the other axial side surface of the mounting plate, By pressing the stepped surface toward the step surface, the portion where the punches are abutted is plastically deformed radially inward to form the locking projections, and at the same time, the locking projections and the locking A manufacturing method of a rolling bearing unit with a mounting plate, comprising a step of engaging a concave groove to combine the outer ring and the mounting plate. An outer ring, an inner ring, a plurality of rolling elements, and a mounting plate;
Of these, the outer ring is annular, the outer ring raceway is on the inner peripheral surface, the small-diameter step portion is at one axial end portion of the outer peripheral surface, and the base end portion of the small-diameter step portion and the axial intermediate portion of the outer peripheral surface are Stepped surfaces are provided over the entire circumference, and a locking groove that is longer in the circumferential direction at a portion closer to the middle in the axial direction than one axial end portion of the outer circumferential surface of the small-diameter stepped portion. Is provided,
The inner ring is annular and is arranged concentrically with the outer ring on the inner diameter side of the outer ring, and an inner ring raceway is provided on the outer peripheral surface.
Each of the rolling elements is provided so as to be freely rollable between the outer ring raceway and the inner ring raceway,
The mounting plate is provided with at least one holding hole, a plurality of locking projections for each holding hole, and a plurality of mounting holes.
Of these, the holding hole has an inner diameter that is larger than the outer diameter of the small-diameter stepped portion and smaller than the outer diameter of the outer ring adjacent to the small-diameter stepped portion in the axial direction. The large-diameter portion that is recessed radially outward than the portion adjacent in the circumferential direction is provided,
Each of the locking projections is provided on the peripheral edge of each of the large diameter portions in a state of projecting radially inward from each of the peripheral portions, and the diameter of the inscribed circle of each of the locking projections Is smaller than the outer diameter of one end portion in the axial direction of the small-diameter step portion, and is equal to or larger than the diameter of the bottom portion of the locking groove.
Each of the locking protrusions engages with the locking groove so as to be capable of relative rotation, and a portion closer to the inner diameter of one side surface in the axial direction of the mounting plate engages with the step surface, whereby the outer ring And this mounting plate are combined in a non-separable manner,
Each of the mounting holes is provided around the holding hole, and the diameter of the inscribed circle of each of the mounting holes is larger than the outer diameter of the outer ring.
A wedge-shaped first with a tip edge sharpened at a peripheral portion of each large-diameter portion in the axially other side surface of the mounting plate in a state where the small-diameter step portion of the outer ring is fitted in the holding hole of the mounting plate. A punch is pressed, and the width dimension in the radial direction of the opening on the other side in the axial direction of the mounting plate is wide at the periphery of each large diameter part, and the width dimension becomes narrower toward the back part. At the same time as forming the concave grooves, the inner portion in the radial direction of each concave groove is plastically deformed radially inward, and then the second punch is pushed into each of the concave grooves. The portions located on the inner diameter side of the concave grooves are further plastically deformed radially inward to form the locking protrusions, and at the same time, the locking protrusions are engaged with the locking grooves. And a method of manufacturing a rolling bearing unit with a mounting plate, comprising the step of combining the outer ring and the mounting plate. When the peripheral portion of each large-diameter portion of the mounting plate is plastically deformed inward in the radial direction, an axial direction of the mounting plate is provided by a holding jig disposed around the outer ring so as to surround the outer ring. The method of manufacturing a rolling bearing unit with a mounting plate according to any one of claims 1 to 2 , wherein a processing load is prevented from being applied to the outer ring by supporting a radial intermediate portion on one side.

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