JP2007333063A - Corrugated cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugated cage capable of inexpensively preventing deformation in an operation, generating between recessed portions of annular plate members. <P>SOLUTION: In this corrugated cage 1 having a structure where the pair of annular plate members 2a, 2b provided with the recessed portions 3a, 3b as pocket portions P are opposed to each other and fastened by rivets, fastened portions 4a, 4b between the recessed portions 3a, 3b are provided with fastening enhancement deformation parts 7a, 7b bulging in the recessed portion depth direction from a joining face position A of the recessed portions 3a, 3b in a rivet unfastened state, and a collapsed deformation state reduced in a void 8 between the opposed fastening enhancement deformation portions 7a, 7b is kept in fastening the rivets. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a corrugated cage.

  Conventionally, as a cage used for a bearing, a pair of annular plate members in which a plurality of concave portions curved in the axial direction are formed at predetermined intervals in the circumferential direction are arranged so that the opening sides of the concave portions face each other in the axial direction. There is a corrugated cage that is fastened by one rivet. In this corrugated cage, a pocket is formed between the concave portions facing each other, and a rolling element is held in the pocket so as to roll when the bearing is assembled.

  With respect to bearings using this wave cage, in recent years, there has been a desire to increase the rotational efficiency by reducing the rolling resistance of rolling elements, and therefore attempts have been made to reduce the number of rolling elements as much as possible.

Japanese Utility Model Publication No. 54-822551

  However, when the number of rolling elements is reduced, the distance between the adjacent rolling elements is increased, so that the distance between the pockets of the cage is inevitably increased, and the annular plate member forming the cage is moved away from the rivet. There is a problem that it is easily deformed in the axial direction during operation. As a current measure, two rivets are fastened in the portion between the adjacent pockets of the cage, and the problem remains in terms of cost because of the large number of rivets.

  In addition, Patent Document 1 discloses a technique for arranging a washer between pockets as a technique for spreading a portion between pockets (a portion between recesses) of a cage, but this also adds a rivet. As with the current corrugated cage, since a separate washer is used, there remains a problem in terms of cost.

  An object of the present invention is to provide a corrugated cage capable of preventing deformation at the time of operation that occurs between recesses of an annular plate member at a low cost in order to enable a reduction in the number of rolling elements. .

In order to solve the above problems, the wave cage of the present invention is
A pair of annular plate members in which a plurality of concave portions curved in the axial direction are formed at predetermined intervals in the circumferential direction are arranged opposite to each other in the axial direction on the opening side of the concave portion, and are fastened between adjacent concave portions. A corrugated cage having a structure fastened by a rivet penetrating in a plate thickness direction at a portion, and having a pocket portion for holding a rolling element between opposing concave portions,
In the fastened portion of at least one of the paired annular plate members, a fastening strengthening deformed portion is formed that bulges from the mating surface position of the concave portion in the depth direction of the concave portion in the rivet fastening release state, While the rivet penetrates through the tightening strengthening deformed portion and the gap formed by the tightening strengthening deforming portion is reduced between the opposed fastened portions, the tightening deforming deformable portion is crushed and deformed in the axial direction. It is characterized by having been fastened.

  In the corrugated cage having the configuration of the present invention, in the rivet non-fastened state, a gap is formed between the fastened portions facing each other between the pair of annular plate members. When the opposing annular plate members are assembled by rivet fastening, the fastening strengthening deformation portion (fastened portion) is crushed and deformed (elastically deformed) so that the gap is reduced. Since the pressing force acts on the deformed fastening strengthening deformed portion in the direction in which the contact portion with the other fastened portion facing in the axial direction is brought into close contact with itself based on the deformation restoring force generated in itself, the deformed fastening The strengthening deformed portion and the other fastened portion opposite to the strengthened deforming portion are held in a state of being in close contact with each other. Thereby, it is possible to effectively prevent deformation in the axial direction during operation of the fastened portion that occurs at a position far from the rivet. Further, since the annular plate member is formed by press molding, the above structure can be easily formed, and since no rivet or other member is required, it can be formed at a low cost.

  As described above, in the configuration of the present invention, the pressing force for bringing the fastening portions into contact with each other is also applied to the contact portion between the fastening portions facing each other in the axial direction in addition to the rivet fastening portion. It is only necessary to provide one for each fastening portion. In this case, the fastening strengthening deformed portion is formed in the circumferential direction so that the bulging maximum height position coincides with the center of the fastened portion, and one rivet penetrates the center position of the fastening strengthening deforming portion. Can be fastened. According to this configuration, since the rivet fastening position is at the center of the fastened portion, the contact portion is positioned at both ends of the fastened portion, that is, close to the recessed portion. The structure is supported in a well-balanced manner at the center of the fastened part to be fastened and the both ends thereof, and deformation of the fastened part can be effectively prevented.

  The fastening strengthening deformation part in the present invention is formed in a curved shape in an arc shape, and a deformation fulcrum part serving as a fulcrum for the deformation deformation of the fastening strengthening deformation part is formed at both ends of each fastening strengthening deformation part. It is good also as what is elastically deformed so that the curvature radius of curvature may expand. According to this configuration, the fastening strengthening deformed portion can be formed in a simple arc shape, and a sufficient deformation preventing effect can be imparted to the fastened portion.

  The fastening strengthening deformed portion in the above configuration can be formed on both of the opposed fastened portions. According to this configuration, the pressing force for bringing the fastened parts facing in the axial direction into close contact with each other is obtained from both fastened parts (fastening strengthening deformed parts), so that the fastened parts facing each other are brought into closer contact with each other. Therefore, the effect of preventing deformation of the fastened portion can be further obtained.

  Moreover, in the said structure, the fastening reinforcement | strengthening deformation | transformation parts of the to-be-fastened part which opposes can be elastically deformed so that it may planarize in the form closely_contact | adhered mutually by rivet fastening. According to this structure, since the to-be-fastened part mutually adheres, said contact part can be formed in the to-be-fastened part whole surface. As a result, the adhesion force between the deformed fastened portion and the other fastened portion facing in the axial direction does not act locally on the fastened portion, but acts on the entire contacting surface. A deformation preventing effect can be obtained.

  In addition, the curved fastening strengthening deformed portion having the above-described configuration is formed on both of the opposed fastened portions, and deformation fulcrum portions serving as fulcrums for the deformation deformation of the fastening strengthening deforming portions are provided at both ends of each fastening strengthening deforming portion. While being formed, the distances between the deformation fulcrum portions of the respective fastening strengthening deformation portions of the opposed fastened portions can be set to be the same. According to this configuration, the distance between the deformation fulcrum portions is the same between the annular plate members facing each other in the axial direction, that is, the circumferential lengths of the annular plate members are equally long due to the deformation of the fastened portion when the rivet is fastened. Or since it becomes short, the annular plate member which makes a pair can be assembled | attached with sufficient balance.

  Furthermore, in the said structure, the bending depth of each fastening reinforcement | strengthening deformation part in the to-be-fastened part which opposes can be defined equally. According to this configuration, the distance between the deformation fulcrums of each fastening reinforcing deformation portion and the bending depth are the same between the annular plate members facing each other in the axial direction. The amount can be made equal, and the paired annular plate members can be assembled in a well-balanced manner. Further, in this case, since the shapes of the fastened portions facing in the axial direction can be substantially the same shape or the same shape, the positions of the fastened portions and the recesses to be opposed at the time of facing placement before rivet fastening. Matching is easy. Further, if the annular plate members facing in the axial direction have the same shape, it is not necessary to make both separately, so that the manufacturing cost can be suppressed.

  In the corrugated cage according to the present invention, deformation fulcrum portions formed of rib-shaped convex portions that are curved in a direction opposite to the concave portions with a smaller radius of curvature than the concave portions are formed at both ends of at least one of the opposed fastened portions. In addition, a portion positioned between the deformation fulcrum portions of the fastened portion may be a fastening strengthening deformation portion, and may be elastically deformed in a concavely curved shape in the fastening direction by the rivet. According to this configuration, the rib-like convex portion is a deformation fulcrum portion of the fastening strengthening deformation portion (fastened portion) at the time of rivet fastening, and the rib-like convex portion is deformed in a state of being in contact with the other fastened portion facing in the axial direction. It has a supporting structure. The fastening strengthening deformed portion deformed by the rivet fastening is subjected to a pressing force that comes into close contact with the contact portion with the opposite other fastened portion due to the deformation restoring force generated by the deformation. The other part to be fastened facing this is held in a state of being in close contact with each other. Thereby, it is possible to effectively prevent deformation in the axial direction of the fastened portion that occurs at a position far from the rivet. Further, since the annular plate member is formed by press molding, the above structure can be easily formed, and since no rivet or other member is required, it can be formed at a low cost. In addition, since it can be configured to function as a part of the fastening strengthening deformation part other than the tip part of the convex part, the distance between the deformation fulcrum parts after crushing deformation can be matched by adjusting the length of the convex part. Become.

  In the wave cage having the above-described configuration, deformation fulcrum portions are formed on both of the opposed fastened portions, and the fastened portions are assembled in such a manner that the corresponding deformable fulcrum portions are in contact with each other. it can. According to this configuration, the pressing force for bringing the fastened parts facing in the axial direction into close contact with each other is obtained from both fastened parts (fastening strengthening deformed parts), so that the fastened parts facing each other are brought into closer contact with each other. Therefore, the effect of preventing deformation of the fastened portion can be further obtained. In addition, in this configuration, the positions of the fastened parts and the recesses that should be opposed to each other at the time of opposing placement before the rivet fastening by making the shapes of the fastened parts facing in the axial direction substantially the same shape or the same shape. Matching is easy. Furthermore, if both of the opposing annular plate members have the same shape, the distance between the deformation fulcrum parts after crushing deformation can be easily matched and assembled in a well-balanced manner, and both of the annular plate members making a pair have the same shape. If so, production costs can be reduced.

  Moreover, the deformation | transformation fulcrum part and the fastening reinforcement | strengthening deformation | transformation part in the said structure can be formed only in one of the to-be-fastened parts which oppose. According to this configuration, the portion to be fastened on the side where the deformation fulcrum portion and the fastening strengthening deformation portion are not formed can be formed into a simple shape such as a linear shape or an arc shape, and the formation is facilitated.

  In the corrugated cage of the present invention, the concave portions are formed at equal intervals in the circumferential direction of the annular plate member, and the circumferential opening dimension L1 of the concave portion and the circumferential length L2 of the fastened portion are L2 ≧ 0.7 × L1. More preferably, it can be configured to satisfy the relationship of L2 ≧ L1. By applying the present invention to the corrugated cage in which such a fastened portion is formed relatively long, the above-described deformation preventing effect of the fastened portion appears more remarkably.

  The bearing of the present invention includes the above-described corrugated cage, and is predetermined in the circumferential direction by the corrugated cage between the outer ring, the inner ring disposed concentrically with the outer ring, and the inner ring and the outer ring. And a plurality of rolling elements held at an array interval. The bearing of the present invention employing the above-mentioned wave cage has a structure in which deformation between the pockets of the cage is unlikely to occur. Therefore, a structure in which the distance between the rolling elements is widened is adopted to roll the rolling elements. The resistance can be reduced. Further, the cost of forming the bearing can be made similar to the conventional one.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the wave cage of the present invention, FIG. 1 is a front view of the wave cage, and FIG. 2 is a plan view of the wave cage. is there. In the waveform holder 1 shown in these figures, the plate thickness direction and the axial direction coincide with each other, and the concave portions 3a and 3b curved in the axial direction are set at predetermined intervals in the circumferential direction (equal intervals in the present embodiment). A plurality of pairs of annular plate members 2a, 2b are arranged so that the openings of the recesses 3a, 3b are opposed to each other in the axial direction, and are fastened between the adjacent recesses 3a, 3a and between 3b, 3b. 4a and 4b have a structure fastened by a rivet 5 penetrating in the thickness direction. Thereby, it has the structure where the pocket part P holding the rolling element B was formed between the recessed parts 3a and 3b which oppose an axial direction.

  The annular plate members 2a and 2b have the same shape, and are formed by press molding, for example. As shown in FIG. 3A, the fastened portions 4a and 4b of the annular plate members 2a and 2b bulge from the mating surface position A of the recesses 3a and 3b in the depth direction of the recesses 3a and 3b. Fastening strengthening deformation portions 7a and 7b are formed. In the present embodiment, the fastening strengthening deformation portions 7a and 7b are formed such that both of the fastened portions 4a and 4b facing in the axial direction have the same shape, and the fastened portion 4a and the fastened portion 4b are axial. It is arranged so as to face the direction. Specifically, the fastening strengthening deformation portions 7a and 7b are formed in an arcuate shape in the non-fastened state (or fastened state) of the rivet 5, and have a maximum bulge height at the center in both circumferential directions. The positions are formed so as to coincide with each other.

  The fastening strengthening deformation portions 7a and 7b are formed so as to be elastically deformable in the axial direction, and deformation fulcrum portions serving as fulcrums for elastic deformation of the fastening strengthening deformation portions 7a and 7b are formed at both ends thereof. 6a, 6a and 6b, 6b are formed. The deformation fulcrum portions 6a and 6b are formed in the vicinity of both end portions of the concave portions 3a and 3b, and are arranged in such a manner that those facing each other in the axial direction are in contact with each other.

  Only one rivet 5 is provided for each of the fastened portions 4a and 4b so as to pass through the center position of the fastened portions 4a and 4b (fastening strengthening deformable portions 7a and 7b), and a pair of annular plate members 2a and 2b. Both sides are concluded. In the non-fastened state (or fastened state) of the rivet 5, as shown in FIG. 3 (a), the gap 8 is formed between the fastening strengthening deformed portions 7a and 7b that are curved in the axial direction. By fastening the rivet 5, as shown in FIG. 3B, the fastening reinforcing deformation portions 7a and 7b are crushed and deformed (elastically deformed) in the direction in which the gap 8 is reduced (axial direction).

  The corrugated cage 1 of the present invention has a structure in which the fastening strengthening deformed portions 7a and 7b are held in an elastically deformed state so that the curvature radius of the curved portion is expanded by fastening the rivet 5. At this time, the deformation fulcrum portions 6a and 6b that are in contact with each other in the axial direction are subjected to deformation returning force generated in the deformed fastening strengthening deformation portions 7a and 7b in close contact with each other. They are held in close contact with each other. When the conventional corrugated cage has a structure in which the number of rolling elements 5 is reduced, the distance between the pocket portions P (between the recesses 3a, 3a or 3b, 3b) becomes longer, so this portion (fastened portion 4a 4b), the further away from the fastening position of the rivet 5, that is, the closer to the adjacent recesses 3a, 3a or 3b, 3b, the easier the deformation of the facing recesses 3a and 3b occurs. . However, according to the above-described structure of the present invention, the pressing force for bringing the opposing deforming fulcrum portions 6a and 6b into close contact acts on the deforming fulcrum portions 6a and 6b provided around the recesses 3a and 3b that are likely to be deformed. The deformation in the direction separating the recesses 3a and 3b is unlikely to occur.

  In addition, in the non-fastened state of the rivet 5, the distance L2 between the deformation fulcrum parts 6a and 6b facing in the axial direction is set to be the same, and the fastening strengthening deformation parts 7a in the fastened parts 4a and 4b that are also facing each other. The bending depth of 7b is determined to be the same, and when the rivet 5 is fastened, the opposing fastening strengthening deformable portions 7a and 7b are elastically deformed so as to be flattened so as to be in close contact with each other. Thereby, the pressing force generated based on the return force of the deformed fastened portions 4a and 4b (fastening strengthening deformable portions 7a and 7b) is not locally applied to the fastened portions 4a and 4b facing in the axial direction. Since the entire contact surface can be transmitted, an effect of preventing deformation can be obtained over the entire fastened portion.

  Moreover, the bearing of the present invention can be formed using the wave cage 1 described above. In this case, as shown in FIG. 4, a plurality of rolling elements B are held in the pocket portion P of the corrugated cage 1 having the above structure, and the corrugated cage 1 is connected to the outer ring 11 and the outer ring 11. It can be set as the bearing 10 provided between the inner rings 12 arranged concentrically. Since the corrugated cage 1 used for the bearing 10 is not easily deformed in the vicinity of the pocket portion P as described above, a bearing having a small number of rolling elements with a long distance L2 between the pocket portions P is formed. Can do. Thereby, the rolling resistance of the rolling element is reduced, and the rotational efficiency is increased.

  Moreover, in this embodiment, as shown in FIG. 3, the recessed parts 3a and 3b constituting the pocket part P are formed at equal intervals in the circumferential direction in the annular plate members 2a and 2b, and the recessed parts 3a, 3b, The circumferential opening dimension L1 of 3b and the circumferential length L2 of the fastened portions 4a and 4b are formed so as to satisfy the relationship of L2 ≧ 0.7 × L1. In the present invention, it suffices if the circumferential opening L1 of the recesses 3a and 3b and the circumferential length L2 of the fastened portions 4a and 4b satisfy the relationship of L2 ≧ L1.

  As mentioned above, although embodiment of this invention was described, these are only illustrations to the last, and this invention is not limited to these, A various change is possible unless it deviates from the meaning of a claim. . Hereinafter, an embodiment different from the above embodiment will be described as the first embodiment. In addition, about the same structure, the description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  For example, in the above-described embodiment, the fastening reinforcing deformation portions 7a and 7b are formed on both of the fastened portions 4a and 4b that are paired in the axial direction, but may be formed on only one of them. Moreover, you may form the fastening reinforcement | strengthening deformation | transformation parts 7a and 7b in any one of the to-be-fastened parts 4a and 4b which oppose in the annular plate member 2a and 2b which make a pair. In these cases, since the number of fastening strengthening deformation portions having a special shape is reduced, the shapes of the annular plate members 2a and 2b are simplified and are easily formed.

  Further, as shown in FIGS. 5 and 6, at both ends of at least one of the fastened portions 40 a and 40 b facing in the axial direction, the opposite direction to the concave portion 3 a or 3 b with a smaller curvature radius than the concave portions 3 a and 3 b. A deformation fulcrum portion 60a or 60b made of a rib-like convex portion that is curved in a straight line is formed, and a portion located between the deformation fulcrum portions 60a, 60a or 60b, 60b is defined as a fastening strengthening deformation portion 70a or 70b. You may form in the form elastically deformed by the shape curved concavely in the fastening direction. Thereby, since the to-be-fastened part which opposes an axial direction can be made into the closely_contact | adhered state by said pressing force, the deformation | transformation in the to-be-fastened part both ends side can be prevented.

  In this case, as shown in FIG. 5, deformation fulcrum portions 60a and 60b are formed on both of the fastened portions 40a and 40b facing in the axial direction, and the corresponding deformable fulcrum portions 60a and 60b of the fastened portions 40a and 40b are formed. It can be set as the structure assembled | attached by mutually abutting 60b. According to this configuration, the above-mentioned pressing force for bringing the fastened parts facing in the axial direction into close contact with each other is obtained from both fastened parts 40a and 40b (fastening strengthening deforming parts 70a and 70b). Since 40a and 40b can be made to adhere | attach more strongly, the deformation | transformation prevention effect of this to-be-fastened part 40a, 40b is further acquired.

  Moreover, as shown in FIG. 6, the deformation | transformation fulcrum part 60a and the fastening reinforcement | transformation deformation | transformation part 70a are formed only in the to-be-fastened part 40a of the annular plate member 2a which opposes an axial direction, and the to-be-fastened part of the other annular plate member 2b is formed. 40b is good also as a structure made into linear shape and the circular arc shape along the circumferential direction of this cyclic | annular board member 2b. According to this configuration, the annular plate member 2b can have a simple structure in which the number of the deformation fulcrum portions and the fastening strengthening deformation portions is reduced.

The front view which shows one Embodiment of the waveform holder of this invention. The top view of FIG. The elements on larger scale which show the fastening / non-fastening state of the corrugated cage of FIG. The top view and sectional drawing of a bearing using the corrugated cage of FIG. The elements on larger scale which show the waveform holder of this invention different from FIG. The elements on larger scale which show the waveform holder of this invention different from FIG.1 and FIG.4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corrugated cage 2a, 2b Annular plate member 3a, 3b Recessed part 4a, 4b, 40a, 40b Fastened part 5 Rivet 6a, 6b, 60a, 60b Deformation fulcrum part 7a, 7b, 70a, 70b Fastening reinforcement deformation part A Matching surface Position B Rolling element P Pocket part 10 Bearing 11 Outer ring 12 Inner ring

Claims (3)

A pair of annular plate members, each having a plurality of concave portions that are curved in the axial direction at a predetermined interval in the circumferential direction, are arranged opposite to each other in the axial direction on the opening side of the concave portion, and are positioned between adjacent concave portions. A corrugated cage having a structure fastened by a rivet penetrating in a plate thickness direction at a fastening portion, wherein a pocket portion for holding a rolling element is formed between the opposing concave portions,
A fastening strengthening deformed portion that forms a bulging form in the depth direction of the concave portion from the mating surface position of the concave portion is formed in the fastening portion of at least one of the annular plate members forming a pair in a rivet fastening release state. The fastening strengthening deformed portion is axially oriented in such a direction that the rivet penetrates at the fastening strengthening deforming portion and the gap formed by the fastening strengthening deforming portion is reduced between the opposed fastened portions. A wave-shaped cage characterized in that it is fastened by the rivet while being crushed and deformed in the direction.   The fastening strengthening deformed portion is formed in an arcuately curved form, and deformation fulcrum portions serving as fulcrums of the crushing deformation of the fastening strengthening deforming portion are formed at both ends of each fastening strengthening deforming portion, and the curving is performed by the rivet fastening. 2. The corrugated cage according to claim 1, wherein the corrugated cage is elastically deformed so that the radius of curvature thereof is increased.   At both ends of at least one of the fastened portions facing each other, a deformation fulcrum portion formed of a rib-like convex portion curved in a direction opposite to the concave portion with a smaller radius of curvature than the concave portion is formed. 2. The corrugated cage according to claim 1, wherein a portion located between the deformation fulcrum portions serves as the fastening strengthening deformation portion and is elastically deformed in a concavely curved shape in a fastening direction by the rivet.

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