JP2023038649A - Connecting member for double-row rolling bearing - Google Patents

Abstract

To provide a connecting member which is hardly detachable from an inner ring of a double-row rolling bearing.SOLUTION: A connecting member 1 connects a first inner ring 52 and a second inner ring 55 of a hub bearing. The connecting member 1 has an annular main body 2 which is formed of a long-length metal plate. A first salient part 7 is salient outward from the annular main body 2 in a radial direction, and the first salient part 7 is fit into a first annular groove 53 of an internal peripheral face of the first inner ring 52. A second salient part 8 is salient outward from the annular main body 2 in the radial direction, and the second salient part 8 is fit into a second annular groove 56 of an internal peripheral face of the second inner ring 55. The connecting member 1 has a first end part 3 and a second end part 4 which oppose each other in a peripheral direction of the annular main body 2. Notches 5, 6 are notched at the end parts 3, 4 in the peripheral direction. The notches 5, 6 have widths for exposing a first annular protrusion 54 protruding inward from the first inner ring 52 in the radial direction, and a second annular protrusion 57 protruding inward from the second inner ring 55 in the radial direction between the annular grooves 53, 56.SELECTED DRAWING: Figure 7

Description

TECHNICAL FIELD The present disclosure relates to a connecting member for a double row rolling bearing. A double-row rolling bearing has, for example, one outer ring, two inner rings arranged in two rows, and rolling elements arranged between the outer ring and each inner ring. The two inner rings are connected by an annular or substantially annular connecting member provided on the inner peripheral surface.

In automobiles, hubs to which wheels are attached are equipped with bearings called hub bearings. A hub bearing is, for example, a double-row rolling bearing, and has one outer ring, two inner rings arranged in two rows, and rolling elements arranged between the outer ring and each inner ring. The two inner rings are connected by an annular or substantially annular connecting member.

The connecting member described in Patent Document 1 is attached along the inner peripheral surface of the inner ring and has a plurality of projections arranged in two rows on the outer peripheral surface. A first row of protrusions fits into an annular groove provided in the inner peripheral surface of the first inner ring. A second row of protrusions fits into an annular groove provided in the inner peripheral surface of the second inner ring. The connecting member thereby connects the first and second inner rings.

The connecting member described in Patent Literature 1 has, for example, an annular body formed by bending an elongated sheet metal into an annular shape by roll forming. It is desirable that the annular main body has a curved surface shape close to a perfect circle so as to be in close contact with the inner peripheral surface of the inner ring.

U.S. Pat. No. 5,470,165

However, when bending the annular body by roll forming, it is more difficult to form desired curved surfaces at both ends of the sheet metal in the longitudinal direction than at other portions. Therefore, for example, both ends of the annular body may be less bendable and have a smaller curvature than other portions. Therefore, for example, both ends of the annular main body interfere with the inner peripheral surface of the inner ring, and the vicinity of the both ends cannot approach the inner peripheral surface of the inner ring. A gap occurs in the In such a case, the projection does not fit into the annular groove of the inner ring, or the amount of fitting is reduced. As a result, the projection may be easily separated from the annular groove of the inner ring due to impact. The two inner rings can thus separate.

Therefore, there has been a need for a connecting member for a double-row rolling bearing that is difficult to separate from the inner ring.

According to one feature of the present disclosure, a bearing connecting member connects a first inner ring and a second inner ring of a double row rolling bearing. The bearing connecting member has an annular main body made of an elongated sheet metal. A first engaging portion protrudes radially outward from the annular main body, and the first engaging portion fits into the first annular groove on the inner peripheral surface of the first inner ring. A second engaging portion protrudes radially outward from the annular main body, and the second engaging portion fits into the second annular groove on the inner peripheral surface of the second inner ring. The bearing connecting member has a first end and a second end facing each other in the circumferential direction of the annular body. A notch is cut out in the circumferential direction at the first end. The notch portion is a first annular protrusion protruding radially inward from the first inner ring and a second annular protrusion protruding radially inward from the second inner ring between the first annular groove and the second annular groove. have a width that exposes

Therefore, the notch reduces the rigidity of the first end. Therefore, for example, the first end portion can be easily bent, and the first end portion can be formed into a shape close to a perfect circle close to the inner peripheral surface of the inner ring. This can prevent the first end from interfering with the inner peripheral surface of the inner ring.

However, there are cases where the planar shape of the sheet metal before processing can still be maintained at the first end. That is, the first end may have a smaller curvature than the annular body. However, even in such a case, a notch is formed in the first end. Therefore, the first end portion can be prevented from interfering with the first annular protrusion of the first inner ring and the second annular protrusion of the second inner ring due to the notch. This allows the first end to follow the inner peripheral surface of the inner ring.

As a result, the outer peripheral surface of the connecting member is brought closer to the inner peripheral surface of the inner ring as a whole, and the gap therebetween becomes smaller. Thus, the first engaging portion reliably fits into the first annular groove of the first inner ring, and the second engaging portion reliably fits into the second annular groove of the second inner ring. Therefore, it becomes difficult for the first engaging portion and the second engaging portion to separate from the annular groove of each inner ring, and thus it becomes difficult to separate from each inner ring.

According to another feature of the present disclosure, the first engaging portion has a plurality of first projections spaced apart in a circumferential direction of the annular body. The second engaging portion has a plurality of second projections spaced apart in the circumferential direction of the annular body. One of the first protrusions is formed along the notch edge of the first end forming the notch. Therefore, the connecting member engages with the annular groove of the inner ring even at the first end having the notch, and can restrict the separation of the two inner rings over a wide range.

According to another feature of the present disclosure, the first end has a reduced curvature relative to the rest of the annular body, and a tip piece of the first end projects into the annular groove. For example, the first end may be less bendable and may have a smaller curvature than the rest of the annular body. However, even in this case, the tip piece of the first end projects into the annular groove like the first protrusion. Therefore, the tip piece of the first end also engages with the inner ring in the same manner as the first protrusion, and restricts the separation of the inner ring in the axial direction.

According to another feature of the present disclosure, the first engaging portion has a plurality of first projections spaced apart in a circumferential direction of the annular body. The first protrusion is formed by connecting a first standing surface and a second standing surface extending radially outward from the annular main body at their radially outward ends. A side edge of the annular body has a plurality of recesses spaced apart in the circumferential direction of the annular body. The multiple recesses correspond to the positions of the multiple first protrusions in the circumferential direction.

Therefore, the first protrusion three-dimensionally bulges radially outward from the annular body to increase the rigidity of the annular body. However, a recess is formed in the vicinity of the first protrusion. Therefore, the recess reduces the rigidity of the annular body. As a result, the concave portion prevents the annular body from being difficult to bend due to the first protrusion. Thus, the annular main body made of a long sheet metal can be easily bent into a shape close to a perfect circle by roll forming.

According to another feature of the present disclosure, the notch in the first end is circumferentially cut out of the annular body and open in a widthwise first direction. The first end has a first tip piece extending toward the second end adjacent to the notch in a second direction opposite to the first direction in the width direction. The second end has a second notch portion that is cut in the circumferential direction of the annular main body and that opens in the second width direction. Furthermore, the second end has a second tip piece extending toward the first end adjacent to the second notch in the first width direction. It is configured such that the notch accommodates the second tip piece and the second notch accommodates the first tip piece when the annular body is contracted in diameter.

Therefore, it is easy to reduce the diameter of the connecting member. For example, when the diameter of the connecting member is reduced, it is possible to prevent the first tip piece of the first end from entering the notch of the second end and hitting the second end. It is possible to prevent the second tip piece of the second end from entering the notch of the first end and hitting the first end. Thus, it is easy to elastically reduce the diameter of the connecting member and attach it to the inner peripheral surface of the inner ring. Moreover, the second notch is also formed in the second end, and the rigidity of the second end is low. As a result, for example, the second end can be easily bent, and the second end can be formed into a shape close to a perfect circle close to the inner peripheral surface of the inner ring.

Further, for example, in the connecting member in a free state, by accommodating the tip piece in each notch, it is possible to eliminate the gap between both ends of the connecting member when viewed from the axial direction. If there is a gap at both end portions of the connecting member in a free state, the annular bodies may pass through the gap and become entangled when the connecting members are collectively transported. If both ends are closed without gaps, such entanglement of the connecting members can be suppressed.

According to another feature of the present disclosure, the first end has two first tips extending toward the second end on either side of the cutout. The second end has a second notch that is notched in the circumferential direction, and two second tip pieces that extend toward the first end on both sides of the second notch. Therefore, since the notches are formed at both ends, the entire outer peripheral surface of the connecting member can be brought into close contact with the inner peripheral surface of the inner ring. Further, when the first inner ring and the second inner ring try to separate from each other in the axial direction, the tip pieces protruding into the first annular groove and the second annular groove respectively interfere with the wall surfaces of the annular grooves, causing the first protrusion and the second protrusion to separate. It works like a protrusion. Therefore, the connecting member is more difficult to separate from the inner ring.

It is a perspective view of a connection member. FIG. 4 is an exploded view of the annular body; 3 is a cross-sectional view taken along line III-III of FIG. 2; FIG. FIG. 11 is a partial perspective view of the annular body in the vicinity of the first projection and the second projection; FIG. 4 is a cross-sectional view of a hub bearing; FIG. 6 is a partially enlarged sectional view of FIG. 5; It is a partial perspective view of two inner rings and a connecting member that connects the two inner rings. 6 is a cross-sectional view taken along line VIII-VIII of FIG. 5; FIG. It is a partial perspective view of the connection member concerning other embodiments. FIG. 11 is a perspective view of a connecting member according to another embodiment; It is a partially expanded view of the connection member concerning other embodiments. It is a partially expanded view of the connection member concerning other embodiments. It is a partial perspective view of the connection member concerning other embodiments. It is a figure which shows the condition which attached the conventional connection member to the inner ring.

An embodiment of the present disclosure will be described based on the drawings. A connecting member 1 shown in FIG. 1 is used for a hub bearing shown in FIG. A hub bearing 50 is provided in the automobile hub to which the wheel is mounted. The hub bearing 50 is a double row rolling bearing and has one outer ring 51 and two inner rings 52 and 55 arranged in two rows. Rolling elements 58 are arranged between the outer ring 51 and the respective inner rings 52 , 55 . The rolling elements 58 are tapered rollers arranged in two rows for each inner ring 52 , 55 . The rolling elements 58 in each row are held by a retainer 59 at predetermined intervals in the circumferential direction. The members on the first inner ring 52 side are assembled to the outer ring 51 from the left in FIG. A member on the second inner ring 55 side is assembled to the outer ring 51 from the right side in FIG.

As shown in FIG. 6, the two inner rings 52 and 55 are connected by a connecting member (connecting ring) 1 so as not to separate in the axial direction. Annular grooves 53 , 56 and annular projections 54 , 57 are formed on the inner peripheral surfaces of the respective inner rings 52 , 55 so that the coupling member 1 is engaged therewith. The annular grooves 53 and 56 are formed in the inner peripheral surfaces of the inner rings 52 and 55 over the entire circumference. The annular projections 54,57 are located between the annular grooves 53,56 and the ends of the inner rings 52,55. The annular protrusions 54 and 57 protrude inward from the annular grooves 53 and 56 . The inner rings 52 and 55 are arranged axially such that the first annular protrusion 54 and the second annular protrusion 57 are adjacent to each other.

A seal member (seal ring) 62 is mounted between the inner rings 52 and 55 as shown in FIG. Chamfers 60 and 61 in which the sealing member 62 is accommodated are formed at the inner circumferential surface angles of the inner rings 52 and 55 . The sealing member 62 is made of rubber and has an annular shape. The sealing member 62 is held by the connecting member 1 from the inner peripheral side using the elastic force of the connecting member 1 . Thereby, the seal member 62 seals between the inner rings 52 and 55 .

As shown in FIG. 1, the connecting member 1 is formed from one metal member, for example, an elongated sheet metal of stainless steel. The connecting member 1 has an annular body 2 having a substantially annular shape. A first end portion 3 is provided on the first end side of the annular main body 2 in the circumferential direction, and a second end portion 4 is provided on the second end side. The first end 3 and the second end 4 face each other in the circumferential direction. A distance WA separates the first end 3 and the second end 4 in the free state. The first end portion 3 and the second end portion 4 are brought closer to each other by elastically reducing the diameter of the annular body 2 .

As shown in Figures 1 and 2, the ends 3 and 4 are of substantially the same shape. The ends 3 and 4 are symmetrical with respect to a plane passing between them and the center of the connecting member 1 . The end portions 3 and 4 have tip pieces 3a, 3b, 4a and 4b at both ends in the axial direction, and cutout portions 5 and 6 at substantially the center in the axial direction. The tip pieces 3a, 3b, 4a, 4b and the notches 5, 6 each extend in the circumferential direction. As shown in FIGS. 1 and 7, the width of the tip pieces 3a, 3b, 4a, 4b is narrower than the width of the annular grooves 53, 56. As shown in FIG. The tip pieces 3a, 3b, 4a, 4b can thus be inserted into the annular grooves 53,56. The tip pieces 3a, 3b, 4a, and 4b are tapered and, for example, both corners of the tips are chamfered. As a result, the tip pieces 3 a , 3 b , 4 a , 4 b are guided and easily inserted into the annular grooves 53 , 56 .

As shown in FIGS. 1 and 7, the notches (relief portions) 5 and 6 are open at the ends 3 and 4 in the circumferential direction. The width WB of the cutouts 5 and 6 is large enough to expose both the first annular protrusion 54 and the second annular protrusion 57 of the inner rings 52 and 55 . The notches 5, 6 therefore allow the tip pieces 3a, 3b, 4a, 4b to enter the annular grooves 53, 56. As shown in FIG.

As shown in FIG. 7, the circumferential length of the notches 5 and 6, that is, the circumferential length of the tip pieces 3a, 3b, 4a, and 4b is, for example, 50% to 100% of the width of the annular body 2. be. Therefore, when the tip pieces 3a, 3b, 4a, 4b are obliquely inserted into the annular grooves 53, 56, the side surfaces of the tip pieces 3a, 3b, 4a, 4b hit the side walls of the annular grooves 53, 56 with a sufficient length. As shown in FIG. 1, the notches 5 and 6 are substantially rectangular and have a bottom surface and a side surface. A curved shape is provided at the corner between the bottom surface and the side surface.

As shown in Figures 7 and 8, the ends 3, 4 are less curved than the other parts of the annular body 2, eg planar or straight. Alternatively, the ends 3 , 4 have a curvature similar to the annular body 2 . In this case, the end pieces 3a, 3b, 4a, 4b do not protrude into the annular grooves 53, 56 along the inner peripheral surfaces of the annular protrusions 54, 57.

As shown in FIGS. 1 and 2, the annular body 2 is formed with a plurality of protrusions 7 and 8 (engagement portions). Projections (claws) 7 and 8 project radially outward from the annular body 2 . The first protrusions 7 are formed in the first axial region of the annular main body 2 at, for example, equal intervals in the circumferential direction. The second protrusions 8 are formed at regular intervals in the circumferential direction in the second axial region of the annular main body 2 . The first protrusion 7 (first engaging portion) is fitted into the first annular groove 53 shown in FIG. The second protrusion 8 (second engaging portion) is fitted into the second annular groove 56 and engaged with the second inner ring 55 .

As shown in FIGS. 2 and 3, the projections (ridges) 7 and 8 have first upright surfaces 7a and 8a, second upright surfaces 7b and 8b, and third upright surfaces 7d and 8d. The first upright surfaces 7a, 8a and the second upright surfaces 7b, 8b are substantially rectangular and are connected to face each other in the circumferential direction. The third upright surfaces 7d and 8d are substantially triangular and stand up with an angle directed outward in the axial direction. The tip edges of the third upright surfaces 7d and 8d are connected to the side edges of the first upright surfaces 7a and 8a and the second upright surfaces 7b and 8b. Therefore, the protrusions 7 and 8 protrude three-dimensionally radially outward from the annular body 2 and have relatively high rigidity. As shown in FIGS. 3 and 4, the protrusions 7 and 8 have contact surfaces 7c and 8c axially inside the first upright surfaces 7a and 8a and the second upright surfaces 7b and 8b.

As shown in FIG. 1, the annular body 2 is formed with a plurality of recesses 9 and a plurality of windows 10 . The recesses 9 are formed in the side edges of the annular body 2 at regular intervals, for example. The concave portion 9 has, for example, a substantially semicircular shape. The window 10 is located in the axial center of the annular body 2 . The windows 10 are formed, for example, at regular intervals in the circumferential direction. The window portion 10 has a substantially rectangular shape. The four corners of the window 10 are curved.

As shown in FIGS. 1 and 2, protrusions 7 and 8 are positioned on both sides of the window 10 in the axial direction. Therefore, when the projections 7 and 8 are press-molded, the projections 7 and 8 are likely to be plastically deformed starting from the edge of the window portion 10 . The circumferential positions of the window 10 and the recess 9 correspond to the circumferential positions of the protrusions 7 and 8 . Therefore, the rigidity of the ring-shaped body 2 is increased by the projections 7 and 8, while the rigidity is decreased by the recessed portion 9 and the window portion 10. As shown in FIG. Therefore, the annular main body 2 has substantially uniform rigidity in the circumferential direction. As a result, the annular body 2 can be easily bent substantially uniformly, and can be easily roll-formed as a whole.

When manufacturing the connecting member 1, first, a long sheet metal (blank material) is formed by cutting. Next, the sheet metal is pressed to form the protrusions 7 and 8 and the window 10 . The sheet metal is roll-formed, for example, using rolls to obtain the annular body 2 from the sheet metal. When roll forming, it is ideal to bend the annular body 2 evenly. In practice, however, the ends 3 , 4 are less bendable than the annular body 2 . Therefore, the ends 3, 4 have a smaller curvature than the annular body 2, and are planar or linear as shown in FIG. 8, for example.

When the connecting member 1 is assembled to the inner rings 52 and 55 as shown in FIG. 5, the diameter of the connecting member 1 is elastically reduced. The outer peripheral surface of the annular main body 2 comes into contact with the inner peripheral surfaces of the inner rings 52 and 55 by returning the connecting member 1 so as to elastically expand its diameter. As shown in FIG. 6, the protrusions 7 and 8 fit into the annular grooves 53 and 56. As shown in FIG. The tip pieces 3a, 3b, 4a, and 4b are also fitted in the annular grooves 53 and 56, respectively. Thereby, the connecting member 1 connects the inner rings 52 and 55 in the axial direction.

The connecting member 1 is formed as described above. The connecting member 1 is line-symmetrical about the center line in the axial direction. The connecting member 1 connects the first inner ring 52 and the second inner ring 55 of the hub bearing 50 as shown in FIG. As shown in FIG. 1, the connecting member 1 has an annular main body 2 made of an elongated sheet metal. A first engaging portion (for example, a first protrusion 7 ) protrudes radially outward from the annular main body 2 , and the first engaging portion fits into the first annular groove 53 on the inner peripheral surface of the first inner ring 52 . . A second engaging portion (for example, a second protrusion 8 ) protrudes radially outward from the annular main body 2 , and the second engaging portion fits into the second annular groove 56 on the inner peripheral surface of the second inner ring 55 . . The connecting member 1 has a first end 3 and a second end 4 facing each other in the circumferential direction of the annular body 2 . A cutout portion 5 is cut out in the circumferential direction in the first end portion 3 . As shown in FIG. 7, the notch 5 is formed between the first annular groove 53 and the second annular groove 56 by the first annular protrusion 54 and the second inner ring 55 projecting radially inward from the first inner ring 52 . It has a width that exposes the second annular protrusion 57 that protrudes radially inward.

Therefore, as shown in FIG. 7, the notch 5 reduces the rigidity of the first end 3 . Therefore, for example, the first end portion 3 can be easily bent, and the first end portion 3 can be formed into a shape close to a perfect circle along the inner peripheral surfaces of the inner rings 52 and 55 . This can prevent the first end portion 3 from interfering with the inner peripheral surfaces of the inner rings 52 and 55 .

However, as shown in FIGS. 7 and 8, there are cases where the planar shape of the sheet metal before processing can still be maintained for the first end 3 . That is, the curvature of the first end portion 3 may be smaller than that of the annular body 2 . However, even in such a case, the notch portion 5 is formed in the first end portion 3 . Therefore, the first end portion 3 can avoid interference with the first annular convex portion 54 of the first inner ring 52 and the second annular convex portion 57 of the second inner ring 55 by the notch portion 5 . This allows the first end portion 3 to follow the inner peripheral surfaces of the inner rings 52 and 55 .

As a result, as shown in FIGS. 7 and 8, the outer peripheral surface of the connecting member 1 is entirely close to the inner peripheral surfaces of the inner rings 52 and 55, and the clearance therebetween becomes small. Thus, the first engaging portion (7) is securely fitted into the first annular groove 53 of the first inner ring 52, and the second engaging portion (8) is securely fitted into the second annular groove 56 of the second inner ring 55. Therefore, the first engaging portion (7) and the second engaging portion (8) are difficult to separate from the annular grooves 53 and 56 of the inner rings 52 and 55, and thus difficult to separate from the inner rings 52 and 55, respectively.

As shown in FIGS. 7 and 8, the first end 3 has a smaller curvature than the rest of the annular main body 2, and the tip pieces 3a, 3b of the first end 3 project into the annular grooves 53, 56. there is For example, since the first end 3 is difficult to bend, it may have a smaller curvature than other portions of the annular body 2 . However, even in this case, the tip pieces 3a, 3b of the first end portion 3 project into the annular grooves 53, 56 in the same manner as the first protrusion 7 does. Therefore, the tip pieces 3a, 3b of the first end portion 3 are also engaged with the inner rings 52, 55 in the same manner as the first protrusion 7, thereby restricting the separation of the inner rings 52, 55 in the axial direction.

As shown in FIG. 1 , the first engaging portion has a plurality of first protrusions 7 arranged at intervals in the circumferential direction of the annular main body 2 . The first protrusion 7 is configured by connecting a first upright surface 7a and a second upright surface 7b extending radially outward from the annular main body 2 at their radially outward ends. The side edge of the annular body 2 has a plurality of recesses 9 spaced apart in the circumferential direction. The multiple recesses 9 correspond to the positions of the multiple first protrusions 7 in the circumferential direction.

Therefore, the first protrusion 7 expands radially outward from the annular body 2 three-dimensionally to increase the rigidity of the annular body 2 . However, a recess 9 is formed in the vicinity of the first protrusion 7 . Therefore, the rigidity of the annular body 2 is lowered by the recess 9 . As a result, the concave portion 9 prevents the annular main body 2 from being difficult to bend due to the first protrusion 7 . Thus, the annular main body 2 made of an elongated sheet metal can be easily bent into a shape close to a perfect circle by roll forming.

As shown in FIG. 1, the first end 3 has two first tip pieces 3a, 3b extending toward the second end 4 on both sides of the notch 5. As shown in FIG. The second end portion 4 includes a second notch portion 6 notched in the circumferential direction and two second tip pieces extending toward the first end portion 3 on both sides of the second notch portion 6. 4a, 4b. Therefore, since the notches 5 and 6 are formed at both ends, the entire outer peripheral surface of the connecting member 1 can be brought into close contact with the inner peripheral surface of the inner ring. Further, when the first inner ring 52 and the second inner ring 55 try to separate from each other in the axial direction, the end pieces 3a, 3b, 4a, and 4b projecting into the first annular groove 53 and the second annular groove 56, respectively, are pushed into the annular grooves 53 and 56, respectively. It interferes with the wall surface of 56 and functions like the first protrusion 7 and the second protrusion 8 . Therefore, the connecting member 1 is more difficult to separate from the inner rings 52 and 55 .

As shown in FIGS. 7 and 8, the ends 3 and 4 are difficult to obtain curvature. However, notches 5, 6 are provided at the ends 3, 4. FIG. The cutouts 5 and 6 prevent the ends 3 and 4 from interfering with the inner peripheral surfaces of the annular protrusions 54 and 57 . On the other hand, since the annular main body 2 is long, it is easy to mold and easy to obtain a curvature. Therefore, the outer peripheral surface of the connecting member 1 is in close contact with the inner peripheral surfaces of the first annular protrusion 54 and the second annular protrusion 57 .

As shown in FIG. 14 , if the connecting member 70 does not have the notches 5 and 6 , the ends 73 and 74 interfere with the annular projections 54 and 57 . Therefore, a gap d is created between the outer peripheral surface of the connecting member 70 and the inner peripheral surface of the inner ring 52 . As a result, the protrusion 7 near the ends 73 and 74 and the first annular projection 54 are less likely to catch on each other, making it easier for the protrusion 7 to disengage from the annular groove 53 and possibly causing the connecting member 70 to come off the inner ring 52. There is On the other hand, in this embodiment, the cutouts 5 and 6 can prevent the gap d from being generated. Thus, the outer peripheral surface of the connecting member 1 is in close contact with the inner peripheral surfaces of the inner rings 52 and 55 without gaps. The first projection 7 and the second projection 8 near the ends 3, 4 can also be tightly fitted into the annular grooves 53, 56. Therefore, the protrusions 7 and 8 that are likely to be separated from the annular grooves 53 and 56 are eliminated, and the separation of the first inner ring 52 and the second inner ring 55 becomes difficult.

As described above, the outer peripheral surface of the connecting member 1 and the inner peripheral surfaces of the annular protrusions 54 and 57 are in close contact, so that the protrusions 7 and 8 near the ends 3 and 4 are also firmly fitted into the annular grooves 53 and 56. .

Embodiment 2 will be described with reference to FIG. Embodiment 2 is formed substantially similar to Embodiment 1 described above. A connecting member 21 of Embodiment 2 has a first end portion 23 shown in FIG. 9 in place of the first end portion 3 shown in FIG. The connecting member 21 also has a second end (not shown) having the same configuration as the first end 23 .

As shown in FIG. 9, the first end portion 23 has tip pieces 23a and 23b and a notch portion 25, like the first end portion 3 shown in FIG.

As shown in FIG. 9, protrusions 27 and 28 are also formed on tip pieces 23a and 23b. The protrusions 27 , 28 have the same shape as the protrusions 7 , 8 formed on the annular body 2 . The first protrusion 27 is formed along the first notch edge 23 d of the notch 25 . The first notch edge 23d faces the second tip piece 23b on one side in the axial direction of the first tip piece 23a. The second protrusion 28 is formed along the second notch edge 23 e of the notch 25 . The second notch edge 23e faces the first tip piece 23a on one axial side of the second tip piece 23b.

The protrusions 27 and 28 shown in FIG. 9 are formed in the annular grooves 53 and 56 similarly to the protrusions 7 and 8 when the connecting member 21 is installed on the inner peripheral surfaces of the inner rings 52 and 55 as shown in FIG. It fits and engages the inner rings 52 , 55 . Tip pieces 23a and 23b shown in FIG. 9 may be planar or linear like tip pieces 3a and 4a in FIG. In this case, the tip pieces 23a, 23b also enter the annular grooves 53, 56. As shown in FIG. As shown in FIG. 9 , the protrusions 27 and 28 are positioned closer to the bottom of the notch 25 than the tip of the notch 25 . Therefore, even if the tip pieces 23a, 23b enter the annular grooves 53, 56, the projections 27, 28 can be prevented from hitting the bottoms of the annular grooves 53, 56. FIG.

As shown in FIG. 9, recesses 9 are also formed in tip pieces 23a and 23b. The recess 9 is located outside the tip pieces 23a and 23b in the width direction. On the other hand, protrusions 27 and 28 are positioned inside the tip pieces 23a and 23b in the width direction. Therefore, the concave portion 9 prevents the protrusions 27 and 28 from partially increasing the rigidity of the tip pieces 23a and 23b.

The connecting member 21 is formed as described above. As shown in FIG. 9 , the first engaging portion has a plurality of first protrusions 7 and 27 that are spaced apart in the circumferential direction of the annular body 2 . The second engaging portion has a plurality of second protrusions 8 and 28 that are spaced apart in the circumferential direction of the annular body 2 . One of the first protrusions (27) is formed along the notch edge 23d of the first end portion 23 forming the notch portion 25. As shown in FIG. Therefore, the connecting member 21 engages with the annular groove 53 of the inner ring 52 even at the first end 23 having the notch 25, and the separation of the two inner rings 52, 55 can be restricted in a wide range.

Embodiment 3 will be described with reference to FIG. Embodiment 3 is formed substantially similar to Embodiment 2 shown in FIG. The connecting member 31 of Embodiment 3 has ends 33 and 34 shown in FIG. 10 instead of the end 23 shown in FIG.

As shown in FIG. 10, the first end portion 33 has one tip piece 33a and a notch portion 35. As shown in FIG. The tip piece 33a is positioned on the second widthwise side (arrow B direction) of the first end portion 33 . Tip piece 33a is formed in the same manner as tip piece 23b in FIG. A protrusion 28 and a recess 9 are also formed in the tip piece 33a. The notch portion 35 is positioned on the first side in the width direction (direction of arrow A) opposite to the tip piece 33a. Therefore, the notch 35 is open not only in the circumferential direction of the first end 33 but also in the first width direction.

As shown in FIG. 10 , the first end portion 33 and the second end portion 34 are point symmetric about a point 39 between the first end portion 33 and the second end portion 34 when viewed from the outer side in the circumferential direction. ing. The second end 34, like the first end 33, has one tip piece 34a and a notch 36. As shown in FIG. The tip piece 34a is located on the first direction side (arrow A direction) in the width direction of the second end 34, and the notch 36 is located on the second direction side (arrow B direction). The cutouts 35 and 36 are substantially rectangular and have a bottom surface and one side surface. A curved shape is provided at the corner between the bottom surface and the side surface.

The connecting member 31 is formed as described above. As shown in FIG. 10, the notch portion 35 of the first end portion 33 is notched in the circumferential direction of the annular main body and opens in the first width direction (direction A). The first end portion 33 has a tip piece 33a extending toward the second end portion 34 adjacent to the notch portion 35 in the second direction (direction B) opposite to the first direction in the width direction. The second end portion 34 has a second notch portion 36 which is notched in the circumferential direction of the annular body and which opens in the second width direction. Further, the second end portion 34 has a tip piece 34a extending toward the first end portion 33 adjacent to the second notch portion 36 in the first width direction A. As shown in FIG. When the annular main body 2 is contracted in diameter (indicated by a two-dot chain line in FIG. 10), the cutout portion 35 accommodates the second tip piece 34a, and the second cutout portion 36 accommodates the first tip piece 33a. configured to accommodate.

Therefore, it is easy to reduce the diameter of the connecting member 31 . For example, when the diameter of the connecting member 31 is reduced, it is possible to prevent the front end piece 33a of the first end portion 33 from entering the notch portion 36 and hitting the second end portion 34 . It is possible to prevent the tip piece 34 a of the second end 34 from entering the notch 35 and hitting the first end 33 . Thus, as shown in FIG. 5, the connecting member 31 can be elastically reduced in diameter and easily attached to the inner peripheral surfaces of the inner rings 52 and 55 .

Further, for example, in the connecting member 31 in the free state, by accommodating the tip pieces 33a and 34a in the respective notches 35 and 36, it is possible to set the connecting member 31 to eliminate the gap at both ends when viewed from the axial direction ( The state of the chain double-dashed line is the free state of the connecting member 31). If there is a gap at both end portions of the connecting member in a free state, the annular bodies may pass through the gap and become entangled when the connecting members are collectively transported. If both ends 33 and 34 are closed without a gap, such entanglement between the connecting members 31 can be suppressed.

Embodiment 4 will be described with reference to FIG. 11 . Embodiment 4 is formed substantially similar to Embodiment 2 shown in FIG. A connecting member 41 of Embodiment 4 has an end portion 43 shown in FIG. 11 instead of the end portion 23 shown in FIG. The connecting member 41 also has a second end (not shown) having the same configuration as the first end 43 .

As shown in FIG. 11, the first end portion 43 has tip pieces 43a and 43b and a notch portion 45, like the end portion 23 shown in FIG. Projection portions 43c and 43d projecting toward the other tip pieces 43a and 43b are provided at the tip portions of the tip pieces 43a and 43b. The extension length of the extension portions 43c and 43d, that is, the length in the width direction, is short enough not to hinder entry of the tip pieces 43a and 43b into the annular grooves 53 and 56, as shown in FIG. The protruding portions 43c and 43d are located on the tip side of the projecting portions 27 and 28, respectively. Therefore, the tip portions of the tip pieces 43a and 43b have higher rigidity than the projecting portions 27 and 28 due to the overhanging portions 43c and 43d.

As shown in FIG. 11, the notch 45 has a bottom surface and side surfaces. A step is formed on the side surface by the projecting portions 43c and 43d. The width of the notch portion 45 is the smallest at the portion having the projecting portions 43c and 43d. This narrowest portion exposes both annular projections 54,57 of the inner rings 52,55.

Embodiment 5 will be described with reference to FIG. 12 . Embodiment 5 is formed substantially similar to Embodiment 2 shown in FIG. A connecting member 81 of Embodiment 5 has an end portion 83 shown in FIG. 12 instead of the end portion 23 shown in FIG. The connecting member 81 also has a second end (not shown) having the same configuration as the first end 83 .

As shown in FIG. 12, the first end portion 83 has tip pieces 83a and 83b and a notch portion 85, like the end portion 23 shown in FIG. Tip pieces 83a, 83b have inner edges facing the other tip pieces 83a, 83b. Missing portions 83c and 83d are provided at the ends of the tip pieces 83a and 83b. As a result, the tips of the tip pieces 83a and 83b are tapered. The missing portions 83c and 83d are recessed to such an extent that they do not exceed the protrusions 27 and 28 in the width direction. The cutout portions 83c and 83d are positioned closer to the distal end than the projections 27 and 28 are. Therefore, the tip portions of the tip pieces 83a and 83b have low rigidity due to the missing portions 83c and 83d. The length in the width direction of the missing portions 83c and 83d does not exceed the length of the protrusions 27 and 28, and is approximately half the length in the width direction of the protrusions 27 and 28, for example.

As shown in FIG. 12, the notch 85 has a bottom surface and side surfaces. The cutout portion 85 has a large width in the width direction due to the cutout portions 83c and 83d.

Instead of the form described above, the following form may be used. For example, the double-row rolling bearing shown in FIG. 5 has two inner rings 52,55. Alternatively, the double row rolling bearing may have three or more inner rings.

The protrusions 27 and 28 shown in FIG. 9 are positioned closer to the bottom of the cutout 25 than the tip of the cutout 25 . Alternatively, for example, the protrusions 27 and 28 may be positioned at the center of the notch 25 or near the tip. That is, the protrusions 27 and 28 may be formed along the notch edges 23d and 23e, and the protrusions 27 and 28 may be located at the tip of the notch 25. FIG. Furthermore, in such a case, it is not necessary to have the same shape as the projections 7 and 8, and for example, like projections 27a and 28a shown in FIG. It may be a shape that has been By setting the annular grooves 53 and 56 deep, interference between the protrusions 27a and 28a and the bottom surfaces of the annular grooves 53 and 56 can be avoided.

As shown in FIG. 4, the projections 7 and 8, which are engaging portions, have three surfaces. Alternatively, the projection may have two surfaces, for example any two of the standing surfaces 7a, 7b, 7d, 8a, 8b, 8d. Alternatively, the protrusion may have only one surface. The protrusions in this case may be located at the widthwise edges of the window 10 shown in FIG. 4, or at the axial edges of the annular body 2, see FIG. . The protrusion in this case is formed by bending a sheet metal member, for example.

The connecting member 1 shown in FIG. 1 has a recess 9 . Alternatively, the recess 9 may not be formed in the connecting member. The connecting member 1 shown in FIG. 1 has a window portion 10 . Alternatively, the window 10 may not be formed in the connecting member.

The connecting member 1 shown in FIG. 1 has notches 5 and 6 at both the first end 3 and the second end 4 . Alternatively, either the first end 3 or the second end 4 may be provided with a notch. Each of the ends described above can be combined, for example the connecting member may have a first end 23 shown in FIG. 9 and a second end 4 shown in FIG.

1, 21, 31, 41, 70, 81 connecting member 2 annular body 3, 23, 33, 43, 73, 83 first ends 3a, 3b, 23a, 23b, 33a, 43a, 43b, 83a, 83b tip piece 4, 34, 74 Second ends 4a, 4b, 34a Tip pieces 5, 6, 25, 35, 36, 45, 85 Notches 7, 27, 27a First protrusions (first engaging portions)
7a First upright surface 7b Second upright surface 7c Contact surface 7d Third upright surface 8, 28, 28a Second projection (second engaging portion)
8a First upright surface 8b Second upright surface 8c Contact surface 8d Third upright surface 9 Recess 10 Window portions 43c, 43d Overhanging portion 50 Hub bearing 51 Outer ring 52 First inner ring 53 First annular groove 54 First annular protrusion 55 Second inner ring 56 Second annular groove 57 Second annular protrusion 58 Rolling element 59 Cage 60, 61 Chamfer 62 Seal member 83c, 83d Missing part A, B Arrow d Gap WA Distance WB Width

Claims (6)

A double-row rolling bearing connecting member for connecting a first inner ring and a second inner ring of a double-row rolling bearing,
an annular main body made of an elongated sheet metal;
a first engaging portion that protrudes radially outward from the annular body and fits into a first annular groove on an inner peripheral surface of the first inner ring;
a second engaging portion protruding radially outward from the annular main body and fitted into a second annular groove on an inner peripheral surface of the second inner ring;
a first end and a second end facing each other in the circumferential direction of the annular body;
and a cutout portion cut out in the circumferential direction at the first end,
The notch portion protrudes radially inward from the first annular protrusion projecting radially inward from the first inner ring and the second inner ring between the first annular groove and the second annular groove. A connecting member for a double-row rolling bearing, having a width that exposes the second annular protrusion. The connecting member for a double-row rolling bearing according to claim 1,
The first engaging portion has a plurality of first protrusions arranged at intervals in the circumferential direction of the annular main body,
The second engaging portion has a plurality of second projections arranged at intervals in the circumferential direction of the annular main body,
A coupling member for a double-row rolling bearing, wherein one of the first protrusions is formed along a notch edge of the first end forming the notch. The connecting member for a double-row rolling bearing according to claim 1 or 2,
the first end has a smaller curvature than the rest of the annular body;
A connecting member for a double-row rolling bearing, wherein a tip piece of the first end projects into the annular groove. A connecting member for a double-row rolling bearing according to any one of claims 1 to 3,
The first engaging portion has a plurality of first protrusions arranged at intervals in the circumferential direction of the annular main body,
the first protrusion is configured by connecting a first standing surface and a second standing surface extending radially outward from the annular body at their radially outward ends,
The side edge of the annular body has a plurality of recesses arranged at intervals in the circumferential direction of the annular body, and the plurality of recesses are located at the positions of the plurality of first protrusions in the circumferential direction. A coupling member for a double-row rolling bearing, corresponding to . A connecting member for a double-row rolling bearing according to any one of claims 1 to 4,
the notch portion of the first end portion is notched in the circumferential direction of the annular main body and opens in the first width direction;
The first end has a first tip piece extending toward the second end adjacent to the notch in a second direction opposite to the first direction in the width direction,
The second end portion includes a second notch portion that is notched in the circumferential direction and that opens in the second width direction, and a second notch portion that is adjacent to the second notch portion in the first width direction. Having a second tip piece extending toward one end,
A double-row rolling roller, wherein the cutout portion accommodates the second tip piece and the second cutout portion accommodates the first tip piece when the annular main body is contracted in diameter. Connecting member for bearings. A connecting member for a double-row rolling bearing according to any one of claims 1 to 4,
The first end has two first tip pieces extending toward the second end on both sides of the notch,
The second end portion includes a second notch portion that is notched in the circumferential direction,
A coupling member for a double-row rolling bearing, comprising two second end pieces extending toward the first end on both sides of the second notch.

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