JP4748373B2 - Roller bearing cage - Google Patents

Description

  The present invention relates to a rolling bearing retainer that holds a rolling element between an inner ring and an outer ring.

Japanese Examined Patent Publication No. 47-19123 Japanese Utility Model Publication No. 6-1848 JP 2003-343571 A

  Some rolling bearing cages (hereinafter referred to as cages) such as ball bearings or roller bearings are made of resin for the purpose of weight reduction. In the case of a resin cage, in particular, it tends to be easily deformed to the outer diameter side by the action of a centrifugal load under high-speed rotation. In this case, when the condition of high temperature environment is added, it becomes easier to deform. The deformation of the cage may lead to a decrease in bearing performance, for example, the contact surface between the cage and the rolling element is displaced from the normal position to increase the rotational torque.

  Some of these resin cages are divided cages for the purposes of assembly, mass production, and handling. In the cage of Patent Document 1, two cage halves (annular part) are connected by pins and sockets, and the circumferential direction of the connecting part (corresponding to the column part) has a large width. The number of storage is reduced. Further, in the cage of Patent Document 2, a pair of opposing claws are provided at equal intervals in the circumferential direction on one side surface of the annular cage body, and a ball holding pocket is formed between the pair of claws. An annular lid is connected to the pocket opening side, the rigidity and strength of the annular part at the connecting part position are reduced, and the centrifugal load is inferior. The cage of Patent Document 3 has a configuration in which the rigidity and strength of the annular portion are reduced.

  However, it is necessary to take into account the lack of rigidity and strength under high-speed rotation due to the fact that the resin cage is made of resin. The number of moving objects stored may be reduced, or the configuration may be complicated. On the other hand, when the number of rolling elements stored is maintained, there is a difficult manufacturing problem that the rigidity strength is reduced.

  In addition, although it is possible to make the cage a split type in which only one of the annular parts is separable and the divided annular part is connected to the tip of the column part during assembly. In addition, there is a risk that the connecting part, which is structurally insufficient in strength, may concentrate only on the one annular part, and the weight of the cage on both sides in the axial direction is difficult to balance due to the deviation of the connecting part position, and under high-speed rotation This will leave the above-mentioned problems. In order to solve the above-mentioned problem, it is necessary to avoid an increase in the weight of the cage due to the incorporation of the connecting portion in order to suppress an increase in centrifugal load.

  In the case of the split type, it is necessary to have a structure that makes it easy to assemble the two divided bodies.

  Furthermore, the above is not necessarily limited to resin cages. For example, it also occurs in cages that may be deformed by centrifugal loads, such as copper alloy machined cages. This is a possible issue.

  The present invention has been made in view of the above problems, and can ensure the required rigidity and strength without reducing the number of rolling elements stored, without increasing the weight of the cage, and An object of the present invention is to provide a cage that is easy to assemble.

Means and actions / effects for solving the problems

In order to solve the above problems, the rolling bearing cage of the present invention is a bearing cage in which a plurality of pocket portions for holding rolling elements are formed in the circumferential direction,
A plurality of column portions that regulate the circumferential position of the rolling element while partitioning each pocket portion in the circumferential direction, and are formed in an annular shape that connects the column portions to each other on the first end side in the axial direction. The first annular part that regulates the axial position of the rolling elements held in each pocket part and the annular part that connects the column parts to each other on the second end side in the axial direction are formed on the second end side. A second annular portion that regulates the axial position of the rolling element held in each pocket portion,
And, the first member to which the first annular part belongs and the second annular part are formed in a form in which the entire cage is divided in the axial direction at the intermediate position of each column part in the circumferential direction. The first member is divided into two parts, and the first member has a first divided pillar part that forms the first member side of the divided pillar part, and the second member also has a divided pillar part. The second divided pillar portion on the second member side belongs, and the first member and the second member are fixed by engaging the corresponding first divided pillar portion and the second divided pillar portion in the axial direction. Is,
The first divided column portion and the second divided column portion protrude in the axial direction, and overlap each other on the leading end side in the protruding direction so as to face each other in a direction orthogonal to the protruding direction. The first and second claw portions projecting in the opposite direction to the front end side in the axial direction on the opposing surfaces of the first engagement portion and the second engagement portion, and the claw portion Formed adjacent to the axial base end side is a first or second recess that accommodates the mating claw portion, and the first one of the first divided column side and the second divided column side By performing an assembling operation to bring the first engagement portion and the second engagement portion closer to each other in the axial direction with the claw portion and the other second claw portion facing each other, the first claw portion And the second claw portion slip over each other elastically with each facing surface as a guide sliding surface , Is housed in a respective second recess and the first recess are those engaged is formed, further,
The guide claw surface of the first claw portion has a first side guide gradient surface that is inclined upward in the axial direction from the tip side that is the receiving side of the second claw portion in the receiving direction of the second claw portion . While having a rounded surface formed between the one-side guide slope surface and an upright surface rising from the inner peripheral surface of the column part ,
The guide sliding surface of the second claw portion faces outward in the axial direction, giving a sliding start point with the first guide slope surface during the assembly operation on the tip side that is the receiving side of the first claw portion. A convex guide curved surface is formed, and a second side inclined surface of a flat downward inclined shape corresponding to the first side guide gradient surface is formed in a form following the axial base end side with respect to the guide curved surface. Features.

  In the rolling bearing cage of the present invention described above, the two divided bodies are not in an unbalanced divided / assembled configuration in which one of the first member and the second member, which are divided bodies, is only an annular portion. It is the division | segmentation and assembly structure with which the balance provided with the part and the pillar division | segmentation part was taken. In other words, the dividing position of the retainer is set to the intermediate position in the axial direction of the retainer, and the dividing / assembling structure is formed in which an engaging portion is formed to connect each other at this position. Thereby, since the weight balance in two division bodies can be ensured easily, the deformation | transformation by the centrifugal load which arises with high speed rotation can be prevented. In addition, the tip on the split surface side in the pillar portion of the two split bodies is a first and second engaging portion that engages and connects each other, and since this portion overlaps each other, It is also possible to ensure the strength of the engaging portion with a greater load burden.

  Furthermore, in the rolling bearing retainer of the present invention, the first claw portion and the second claw portion slide over each other elastically with each other facing each other as a guide sliding surface. The structure is in an engaged state. The guide sliding surface of the first claw portion is a slope surface (first side guide slope surface) so that the second claw portion can be easily received. A curved surface (guide curved surface) is formed on the receiving side of the claw portion to give a sliding start point with the inclined surface of the first claw portion, and an inclined surface (second inclined surface) is formed following the curved surface. Is formed. For this reason, during the assembling operation of the two divided bodies, the initial assembling operation force required until the sliding is started from the contact state is reduced by the curved surface formed on the second claw portion. In addition, since the inclined surface is formed on the second claw portion after the start of sliding, the sliding operation can be easily performed with a constant assembling operation force. That is, it is possible to easily assemble the two divided bodies.

  In the guide sliding surface of the second claw portion in the configuration of the present invention described above, the guide curved surface is an outwardly convex guide radius surface, and the second inclined surface coincides with the tangential direction at the end of the guide radius surface. A flat down-tilt configuration can be used. The second claw portion is provided with a sliding start point for receiving the first claw portion on the guide round surface, so that the initial assembling operation force for receiving the first claw portion and starting the sliding can be slid. It can be greatly reduced than the assembly operation force required after the start of movement. Furthermore, by applying the initial assembly operation force, the sliding speed on the guide round surface of the first claw portion can be increased, and the inclined surface of the subsequent first claw portion can be increased using the acceleration force. The upper sliding can be facilitated.

  Further, in the configuration of the present invention, the bottom surface of the first recess is formed as a horizontal bottom surface parallel to the axial direction, and the second claw portion is adjacent to the proximal side in the axial direction with respect to the second side inclined surface, A horizontal contact surface that contacts the horizontal bottom surface of the one recess is formed, and a gap is formed between the second inclined surface and the horizontal bottom surface. When the second claw portion and the bottom surface of the first recess are in contact with each other in the engaged state between the first claw portion and the second claw portion, both the claw portions are stably held. However, there is a possibility that the second claw portion and the bottom surface of the first recess are not in contact with each other when the ascending slope of the guide sliding surface of the second claw portion is changed more greatly in order to facilitate assembly. is there. According to the above configuration, even if the upward slope of the guide sliding surface of the second claw portion is greatly changed to facilitate assembly, the second claw portion has the horizontal bottom shape of the defined first recess. Since the horizontal contact surface which contacts is formed, both the claws can be stably held in the engaged state. At this time, the bottom structure of the first recess does not need to be changed with the shape change of the second claw portion.

  The first side guide gradient surface of the first claw portion in the configuration of the present invention includes a tip side round surface formed to protrude outward on the tip side in the axial direction of the first claw portion, and the tip side round surface And a first side inclined surface having a flat upward inclined shape coinciding with the tangential direction at the end thereof. According to this configuration, the second claw portion can be smoothly accommodated in the first recess by the assembling operation.

  In the configuration of the present invention, a first vertical surface rising from the bottom surface of the first recess is formed on the axial base end side of the first claw portion, and a first vertical surface of the second claw portion is formed on the axial base end side. A second vertical surface rising from the two-side contact surface is formed, and the first vertical surface of the first claw and the second vertical surface of the second claw are brought into contact with each other in the axial direction by the assembling operation. State and can. With this configuration, when the two divided bodies (the first member and the second member) are assembled, they can be stably fixed without being pulled out in the axial direction.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a rolling bearing provided with a resin rolling bearing cage according to the first embodiment of the present invention, FIG. 2 is a perspective view of the cage shown in FIG. 1, and FIG. It is a perspective view of the division body.

  The rolling bearing 1 shown in these drawings includes an outer ring 2, an inner ring 3 concentrically arranged with the outer ring 2, a plurality of rolling elements 5 interposed between the outer ring 2 and the inner ring 3, and a plurality of rolling elements. And a split type resin cage 10 that holds 5 in a circumferential direction so as to roll freely. A plurality of pocket portions 6 for holding the rolling elements 5 are formed in the bearing cage 10 in the circumferential direction.

  The cage 10 connects the first annular portion 21, the second annular portion 31 that is disposed to face the first annular portion 21 in the axial direction, and the first annular portion 21 and the second annular portion 31. And a plurality of column portions 12. The column portion 12 regulates the circumferential position of the rolling element 5 while partitioning each pocket portion 6 formed in the cage in the circumferential direction. The first annular portion 21 is formed in an annular shape, and the pillar portions 12 are connected to each other on the first end side in the axial direction, and the rolling elements 5 are held in the pocket portions 6 on the first end side. The position in the axial direction is regulated. Similarly to the first annular portion 21, the second annular portion 31 is also formed in an annular shape. The column portions 12 are connected to each other on the second end side in the axial direction, and each pocket portion 6 is connected to the second end side. The position of the rolling element 5 held in the axial direction is regulated.

  The cage 10 has a first member 20, a second member 30, and a split surface 120 that is divided in the axial direction at an intermediate position in the axial direction of each column portion 12 provided in the circumferential direction. Divided into two. The first member 20 includes a first annular portion 21 and a first divided column portion 22 that forms the divided member 12 on the first member 20 side. The second member 30 includes a second annular portion 31 and a second divided pillar portion 32 that forms the second member 30 side of the divided pillar portion 12. And the 1st member 20 and the 2nd member 30 are comprised because the corresponding 1st division | segmentation pillar part 22 and the 2nd division | segmentation pillar part 32 engage in an axial direction. In the present embodiment, the first member 20 and the second member 30 are both formed of a resin material, but may be a metal material.

  As shown in FIG. 5, the first divided column portion 22 protrudes in the axial direction, and the first divided column portion 22 is formed with the first engagement portion 40 formed on the front end side (divided surface 120 side) in the protruding direction. Some portions 50 are formed, and these are alternately arranged in the circumferential direction. The second divided pillar portion 32 protrudes in the axial direction, and the first engaging portion 40 and the second engaging portion 50 are formed on the leading end side (dividing surface 120 side) in the protruding direction. These are alternately arranged in the circumferential direction. And in the engagement state of the 1st division pillar part 22 and the 2nd division pillar part 32, the 1st engagement part 40 of one division pillar part and the 2nd engagement part 50 of the other division pillar part are The first engaging part 40 and the second engaging part 50 that are engaged are opposed to each other in the direction perpendicular to the projecting direction at the front end side (dividing surface 120 side) of each projecting direction. Overlap. In the present embodiment, they overlap in the radial direction.

  Moreover, in this embodiment, the 1st division | segmentation pillar part 22 is the long division | segmentation pillar part 221 which has the length of the 1st axial direction, and the short division | segmentation pillar part whose 1st axial direction length is shorter than the long division | segmentation pillar part 221. 222 are alternately formed in the circumferential direction. The same applies to the second divided column portion 32, and a long divided column portion 321 having a length in the first axial direction and a short divided column portion 322 having a first axial direction length shorter than the long divided column portion 321 are arranged around the circumference. It is formed alternately in the direction.

  The first engagement portion 40 is a first claw portion 42 that protrudes in a direction opposite to the second engagement portion 50 that is an engagement partner, and a shape adjacent to the first claw portion 42 on the proximal side in the axial direction. And a first recess 41 that accommodates the mating claw portion 52.

  In the first divided column portion 22 or the second divided column portion 32 in which the first engaging portion 40 is formed at the distal end in the axial direction, a proximal end portion 48 is formed on the proximal end side in the axial direction. A proximal end surface 49 is formed on the distal end side in the axial direction, and the first engaging portion 40 is formed to protrude from the radially inner side of the proximal end surface 49.

  The second engaging portion 50 is a second claw portion 52 that protrudes in a direction opposite to the first engaging portion 40 that is an engagement partner, and a shape adjacent to the second claw portion 52 on the proximal side in the axial direction. And a second recess 51 for accommodating the mating claw portion 42.

  An outer peripheral surface portion 57 that covers the second claw portion 52 and the second concave portion 51 from the outside in the radial direction is formed on the first divided column portion 22 or the second divided column portion 32 in which the second engagement portion 50 is formed at the tip in the axial direction. And the circumferential direction side surface parts 56 and 56 which cover the 2nd nail | claw part 52 and the 2nd recessed part 51 from both the circumferential directions are formed. The circumferential side surfaces 56 and 56 abut against the circumferential side surfaces 46 and 46 of the engaged first claw portion 41 when the first claw portion 41 is accommodated in the second recess 51. It functions as a rotation prevention unit that restricts rotation. The first divided column portion 22 or the second divided column portion 32 in which the second engaging portion 50 is formed at the front end in the axial direction has a flat surface formed by the front end surfaces of the outer peripheral surface portion 57 and the peripheral side surface portions 56 and 56. An axial-direction tip wall surface portion 59 is formed, and the axial-direction tip wall surface portion 59 is formed with an open portion 58 that is opened in a rectangular shape radially inward.

  In the present embodiment, the divided column portions in which the first engagement portion 40 is formed at the axial direction tip are the long divided column portions 221 and 321, and the division in which the second engagement portion 50 is formed at the axial direction tip. The column portions are short divided column portions 222 and 322.

  Next, the nail | claw parts 42 and 52 and the recessed parts 41 and 51 which are formed in the 1st engaging part 40 and the 2nd engaging part 50 are demonstrated using FIGS. 4 is a cross-sectional view taken along the line AA in FIG. 2, FIG. 5 is an enlarged cross-sectional view of the divided pillar portion having the first engaging portion 40, FIG. 6 is a partially enlarged cross-sectional view of FIG. FIG. 4 is an enlarged cross-sectional view of a divided pillar portion having an engaging portion 50. 5 is the long divided column portion 221 of the first member 20. The divided column portion shown in FIG. The contents shown are the same in the long divided column portion 321 of the second member 30, and the divided column portion shown in FIG. 7 is the short divided column portion 322 of the first member 30. Since the contents shown are the same in the short division pillar portion 222 of the second member 20, the description of the long division pillar portion 321 and the short division pillar portion 222 is omitted.

  As shown in FIGS. 5 and 6, the first claw portion 42 includes an inner peripheral surface 4 m that forms the radial inner peripheral surface of the divided column portion, an upright surface 4 l that rises from the inner peripheral surface 4 m, and the upright surface 4 l. Guide sliding surface 4A that is inclined upward in the receiving direction of the second claw portion 52, a horizontal upper surface 4k that extends parallel to the axial direction from the end (upper end) of the guide sliding surface 4A, and the horizontal upper surface 4k And a rising surface 4d falling from the surface.

  The guide sliding surface 4A includes, in the axial direction, a first side guide gradient surface 4B that has an upward gradient from the distal end side, which is the receiving side of the second claw portion 52, in the receiving direction of the second claw portion 52; It has a rounded surface 4c formed between the side guide inclined surface 4B and the upright surface 4l. The first side guide inclined surface 4B has a tip side rounded surface 4b formed to protrude outwardly at the tip end side in the axial direction of the first claw portion 42, and a tangential direction at the end of the tip side rounded surface 4b. And a first inclined surface 2a having a flat upward inclined shape that coincides with The rounded surface 4c is formed with a first inclined surface 4a and an upright surface 4l that coincide with the respective tangential directions at both ends thereof. In the present embodiment, the horizontal upper surface 4k is also included in the guide sliding surface 4A.

  As shown in FIGS. 5 and 6, the first recess 41 is recessed inward from the horizontal bottom surface 4 </ b> C parallel to the axial direction and the front end side (first claw portion 42 side) of the horizontal bottom surface 4 </ b> C in the axial direction. A rising surface 4d rising through the rounded surface 4h, a base end surface 4i (49) rising up from the axial bottom side (annular portion side) of the horizontal bottom surface 4C through the rounded surface 4g that is concave inward, An outwardly projecting rounded surface 4j formed between the base end surface 4i and the outer peripheral surface of the base end portion 48 is formed.

  As shown in FIG. 7, the second claw portion 52 has a guide sliding surface 5A on which the first claw portion 42 slides at the tip in the axial direction, and the axial direction of the second claw portion 52 from the guide sliding surface 5A. A horizontal lower surface 5e that follows the base end side, a rising surface 3d that rises from the horizontal lower surface 5e through an outwardly projecting round surface 5h, and a front end surface 5i that rises from the end of the guide sliding surface 3A on the axial front end side. And an outwardly convex round surface 5j formed between the tip surface 5i and the outer peripheral surface 5m of the divided column portion.

  The guide sliding surface 5A is outwardly convex in the axial direction, on the tip side that is the receiving side of the first claw portion 42, giving a sliding start point with the first side guide gradient surface 4B during the assembling operation. A curved guide surface 5a is formed, and a flat second inclined surface 5b corresponding to the first guide slope surface 4B is formed in a form following the axial base end side with respect to the guide curved surface 5a. In the present embodiment, the curved guide surface 5a is an outwardly convex guide radius surface, and the second inclined surface 5b is a flat downward slope that coincides with the tangential direction at the end of the guide radius surface 5a. It takes a form. In the present embodiment, the guide sliding surface 5A includes a horizontal lower surface 5e and a rounded surface 5h.

  As shown in FIG. 7, the second recess 51 includes a horizontal bottom surface 5c that is parallel to the axial direction and continues to the open portion 58, and an inner side from the front end side (second claw portion 52 side) of the horizontal bottom surface 5c in the axial direction. And a rising surface 5d that falls through a rounded surface 5f that is concave in the direction.

  Since the claw portions 42 and 52 and the concave portions 41 and 51 are formed in this way, when the first member 20 and the second member 30 are assembled, therefore, the first engagement portion 40 and the second engagement portion are assembled. Claw portions 42 and 52 and concave portions 41 and 51 are formed so that the mating portion 50 can be easily engaged with each other by an assembling operation.

  The first member 20 and the second member 30 that are the divided bodies of the cage 10 formed in this way are the first claw portions 42 provided on either the first divided column portion 22 or the second divided column portion 32. And the second claw portion 52 provided on the other side are arranged at positions facing each other, and an assembly operation is performed to bring the first engagement portion 40 and the second engagement portion 50 closer to each other in the axial direction. The first claw portion 42 and the second claw portion 52 pass over each other in an elastic manner so that the opposing surfaces 2A and 3A are the guide sliding surfaces. It is accommodated and is in an engaged state. Specifically, the first raised surface 4d of the first claw portion 42 and the second raised surface 5d of the second claw portion 52 are brought into engagement with each other in the axial direction.

  FIG. 8 is a diagram illustrating a process of assembling the first member 20 and the second member 30. As shown in FIG. 8A, first, the first member 20 and the second member 30 are assembled with the first member 20 and the second member 30, respectively, An assembling operation is performed in which the second claw portion 50 is positioned so as to face each other in the axial direction and then approached. Specifically, the approaching operation is performed in such a manner that the first engagement portion 40 is inserted into the opening portion 58 of the second engagement portion 50. If this operation is continued, as shown in FIG. 8B, the guide sliding surface 4A of the first engaging portion 40 and the guide sliding surface 5A of the second engaging portion 50 come into contact with each other. Specifically, the first side inclined surface 4a or the rounded surface 4c of the first claw portion 40 and the guide curved surface 5a of the second claw portion 50 abut. At this time, the pressing force in the axial direction by the assembling operation acts on both guide sliding surfaces 4A and 5A, and the first engaging portion 40 formed mainly in the long divided column portions 221 and 321 is moved downward in the figure. Extrude elastically. Since the guide curved surface 5a of the second claw portion 50 is formed as a rounded surface having a constant radius, the first claw portion 40 can be elastically pushed down with a relatively small assembling operation force. When the assembling operation is continued, the second claw portion 50 has a contact position with the guide sliding surface 4A of the first claw portion 40 from the guide curved surface 5a to the second inclined surface 5b and further to the horizontal lower surface 5e. Transition. At the same time, in the first claw portion 40, the contact position of the second claw portion with the guide sliding surface 5A shifts from the first inclined surface 4a to the rounded surface 4b and further to the horizontal upper surface 4k. In FIG. 8C, the horizontal upper surface 4k of the first claw portion 40 and the horizontal lower surface 5e of the second claw portion 50 are in contact with each other. When the assembly operation further proceeds and the axial direction proximal end of the horizontal upper surface 4k of the first claw 40 and the rounded surface 5h of the second claw 50 come into contact with each other, the first claw 40 is elastically pushed downward. The first engagement portion thus pressed presses the second claw portion 50 upward with its own elastic restoring force. Thereby, the 2nd nail | claw part 50 is extruded to the assembly operation direction side, even if an assembly operation force does not act. Then, as shown in FIG. 8D, the second claw portion 52 is accommodated in the first recess 41, and the vertical surface 4d of the first claw portion 42 and the vertical surface 5d of the second claw portion 52 are in the axial direction. It will be in the engagement state which contacts. Thereby, it will be in the state which the 1st member and the 2nd member connected.

  In this engaged state, the horizontal lower surface 5e of the second claw portion 52 is a horizontal contact surface that contacts the horizontal bottom surface 4C of the first recess 41, and at the same time, a second side slope adjacent to the horizontal lower surface 5e. A gap is formed between the surface 3b and the horizontal bottom surface 4C as a guide surface. That is, the horizontal bottom surface 4 </ b> C includes the horizontal abutment surface 4 e that the second claw portion 52 abuts on the distal end side in the axial direction of the first engagement portion 40 and the second claw on the proximal end side in the axial direction of the first engagement portion 40. The portion 52 has a non-contact horizontal non-contact surface 4f. Further, the base end surface 4i of the first claw portion 42 and the front end surface 5i of the second claw portion 52 are in contact with each other, and the base end surface 49 of the first engagement portion 40 and the column end front end of the second engagement portion. The wall portion 59 is in contact with the wall surface portion 59.

  In this engaged state, the circumferential side surfaces 56 and 56 of the second engagement portion 50 abut on the circumferential side surfaces 46 and 46 of the first claw portion 41, and the first member 20 and the second member 30 The relative rotation in the circumferential direction is regulated.

  As described above, in the cage 10 of the first embodiment, both the first member 20 and the second member 30 forming the divided body are engaged by aligning the divided column portions 22 and 32 in the axial direction. The first engaging portion 40 and the second engaging portion 50 are formed as engaging portions for locking and connecting, and the guide sliding surface 4A is provided on each opposing surface. , 5A are formed. As a result, the locking connection can be easily performed.

  In addition, split column portions 221 and 321 including the first engagement portion 40 and split column portions 222 and 322 including the second engagement portion 50 are alternately provided for the annular portions 21 and 31. As a result, the entire cage has a divided / assembled configuration in which the weight is balanced, so that it is possible to effectively prevent deformation due to the centrifugal load caused by high-speed rotation. Furthermore, in this case, since the first member 20 and the second member 30 can be formed in the same shape, they can be manufactured from one type of mold, so that the cost can be greatly reduced.

  Moreover, in said 1st embodiment which can prevent the deformation | transformation by a centrifugal load effectively, the pillar part 12 which has the fixed constant circumferential direction width | variety is divided | segmented pillar part 222 in which the engaging part 50 was formed, 322 is formed in such a manner that the split column portions 221 and 321 having the engaging portion 40 formed at the tip of the protruding portion engage with each other. This structure can be formed without increasing the circumferential width of the pillar portion of the cage. Therefore, change the external shape of the cage, such as reducing the pocket width, increasing the circumferential width of the column by reducing the number of pockets and reducing the number of rolling elements, and increasing the overall size of the cage. There is no need to improve strength and rigidity.

  Next, a second embodiment of the present invention will be described. 9A and 9B relate to the cage according to the second embodiment of the present invention. FIG. 9A is a partial perspective view of the first member 20 that is one divided body, and FIG. 9B is the other divided body. FIG. 9C is a partial perspective view of the cage 10 in which the two divided bodies 20 and 30 are connected. In these drawings, portions corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the second embodiment, the thickness in the overlapping direction of the first engagement portion 40 and the second engagement portion is small on the distal end side in the axial direction of the base end portion 48 of the long divided column portions 221 and 321, and the annular portion A stepped portion 45 is formed by forming a stepped surface 45b on the 20th and 30th sides. In the present embodiment, a stepped portion 45 is formed on the side where the first engaging portion 40 is not formed in the overlapping direction. On the other hand, the short column divisions 222 and 322 have extension portions 55 extending in the axial direction from the upper ends of the column end front wall surfaces 59 that form the axial direction front end surfaces of the circumferential side surface portions 56 and 56 and the outer peripheral surface portion 57. Is formed. In the engaged state, the lower surface of the extending portion 55 contacts the upper surface 45a of the stepped portion 45 in the overlapping direction, and the tip end surface in the axial direction contacts the step surface 45b in the axial direction. The extending portion 55 has a thickness that corresponds to the height of the stepped surface 45b, that is, the thickness of the base end portion 48 that is thin, so that the strength and rigidity of the entire column portion can be ensured. ing. And since the burden by the external force concerning the engaging parts 40 and 50 is distributed also to the extension part 55 and the base end part 48, it is easy to prevent a deformation | transformation. Moreover, the extension part 55 and the step part 45 also have a positioning function at the time of an assembly | attachment.

  Note that the overlapping direction in the present embodiment can be a radial direction. In this case, since the extending portion 55 can play a role of receiving the centrifugal load, an effect of preventing deformation due to the centrifugal load can be obtained.

  A third embodiment of the present invention will be described. FIG. 10 is a partial perspective view of a cage according to the third embodiment of the present invention, and FIG. 11 is a partial perspective view of the cage. In these drawings, parts corresponding to those in the above embodiment are given the same reference numerals, and the description thereof is omitted.

  In the third embodiment, the divided column portions 22 and 32 formed on the first member 20 and the second member 30 are formed by adjoining the long divided column portions 221 and 321 and the short divided column portions 222 and 322 in the circumferential direction. Form.

  In the present embodiment, among the side surfaces in the circumferential direction of the long divided column portions 221 and 321, the side surface on the short divided column portion 222 and 322 side that is formed adjacent to the first engaging portion 40 on the front end side in the axial direction. Along the end 48, the short divided column portions 222 and 322 are formed flat up to the axial front end wall portion 59, and the short divided column portions 222 and 322 are arranged on the long divided column portions 221 and 321 side in the circumferential side surface portion 56. Is formed in a state where the open portion 58 is also opened on the long divided column portions 221 and 321 side, and both of these divided column portions are coupled in the circumferential direction. In this case, when the first member 20 and the second member 30 are engaged with each other, the first claw portion 41 is received and engaged in the second recess 51 from the opening portion 58 in the axial direction. Among the circumferential side surfaces of the column portions 221 and 321, the side surfaces on the side of the adjacent short divided column portions 222 and 322 are moved in the circumferential direction of the first claw portion 41 in the open state 58. It functions as a rotation blocking portion that regulates together with the remaining circumferential side surface portion 56. And since the engagement location in one pillar part becomes two places, assembly | attachment intensity | strength increases.

  A fourth embodiment of the present invention will be described. FIG. 12 is a partial perspective view of the cage according to the fourth embodiment of the present invention, and FIG. 13 is a partial perspective view showing a divided state of the cage of FIG. In these drawings, parts corresponding to those in the above embodiment are given the same reference numerals, and the description thereof is omitted.

  In the fourth embodiment, as in the third embodiment, the divided column portions 22 and 32 formed on the first member 20 and the second member 30 are divided into the long divided column portions 221 and 321 and the short divided column portion 222 and the like. 322 and adjacently formed in the circumferential direction, and in the same manner as the second embodiment, the long divided column portions 221 and 321 have stepped portions 45 and the short divided column portions 222 and 322 have extended portions. 55 is formed.

  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. .

  For example, the resin material of the first member 20 and the second member 30 of the cage 10 in the above embodiment can be, for example, a polyamide resin such as nylon 6 or a polyacetal resin. If the 1st member 20 and the 2nd member 30 of the said structure are manufactured with these resin materials and these are assembled | attached and it is set as a holder | retainer, the subject of this invention will be solved.

  5 to 7, the angle A formed by the first side inclined surface 4a of the first claw portion 42 with respect to the axial direction and the angle formed by the second side inclined surface 5a of the second claw portion 52 with respect to the axial direction. The B degree is formed between 5 ° and 15 °. More preferably, it is formed at 5 ° to 10 °. Further, the angle difference between the angle A and the angle B is 10 ° or less. Thereby, the force required for the assembling operation is reduced, and smooth assembling becomes possible.

A sectional view of a rolling bearing provided with a cage concerning a first embodiment of the present invention. The perspective view of the holder | retainer shown in FIG. The perspective view of the division body of a holder | retainer shown in FIG. 1, and its partial enlarged view. AA sectional drawing of FIG. Sectional drawing of the holder | retainer division body containing a 1st engaging part. The elements on larger scale of FIG. Sectional drawing of the holder | retainer division body containing a 2nd engaging part. The figure explaining the assembly | attachment process of a division body. The fragmentary perspective view which shows the connection state of the division body of a holder | retainer which concerns on 2nd embodiment of this invention, and a division body. The fragmentary perspective view of the holder | retainer which concerns on 3rd embodiment of this invention. The fragmentary perspective view which shows the division | segmentation state of the holder | retainer which concerns on 3rd embodiment of this invention. The fragmentary perspective view of the holder | retainer which concerns on 4th embodiment of this invention. The fragmentary perspective view which shows the division | segmentation state of the holder | retainer which concerns on 4th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling bearing 2 Outer ring 3 Inner ring 5 Rolling body 6 Pocket part 10 Bearing holder 12 Column part 120 Split surface 20 First member 30 Second member 21 First annular part 31 Second annular part 22 First divided pillar part 32 First Divided column portion 221, 321 Long divided column portion 321, 322 Short divided column portion 40 First engagement portion 41 First recess portion 42 First claw portion 4A Guide sliding surface 4B First side guide gradient surface 4C Horizontal bottom surface 4a First One side inclined surface 4b, 4c Round surface 4d Elevated surface 4i (49) Base end surface 50 Second engaging portion 51 Second recess 52 Second claw portion 5A Guide sliding surface 5a Guide curved surface 5b Second side inclined surface 5e Horizontal Bottom

Claims (3)

In the bearing cage in which a plurality of pocket portions for holding the rolling elements are formed in the circumferential direction,
A plurality of column portions that regulate the circumferential position of the rolling element while partitioning each pocket portion in the circumferential direction, and are formed in an annular shape that connects the column portions to each other on the first end side in the axial direction. A first annular portion that regulates the axial position of the rolling elements held in the pocket portions on the side, and an annular shape that connects the column portions to each other on the second end side in the axial direction, A second annular portion that regulates the axial position of the rolling element held in each pocket portion on the end side;
And the 1st member to which said 1st annular part belongs, said 2nd form in the form where the splitting surface divided in the direction of an axis in the axial direction middle position of each said pillar in the peripheral direction arises, and said 2nd The first member is divided into a second member to which the annular portion belongs, and the first member includes a first divided pillar portion that forms the first member side of the divided pillar portion. The second divided pillar part which forms the second member side of the divided pillar part belongs, and the first divided pillar part and the second divided pillar part corresponding to each other are engaged in the axial direction. The first member and the second member are fixed,
The first divided column portion and the second divided column portion protrude in the axial direction, and overlap each other at a distal end side in the protruding direction in a direction orthogonal to the protruding direction. A first engagement portion and a second engagement portion projecting in the opposite direction to the front end side in the axial direction on the opposing surfaces of the first engagement portion and the second engagement portion; A first or second concave portion for accommodating the mating claw portion is formed adjacent to the proximal end side in the axial direction with respect to the portion, and either the first divided column portion side or the second divided column portion side is formed. An assembling operation for bringing the first engaging portion and the second engaging portion closer to each other in the axial direction in a positional relationship in which the first claw portion and the other second claw portion face each other. By doing so, the first claw portion and the second claw portion each have a facing surface as a guide sliding surface. Passing while overcoming elastically to one another in that form, are accommodated in a respective second recess and the first recess are those engaged is formed, further,
In the axial direction, the guide sliding surface of the first claw portion includes a first side guide gradient surface that is inclined upward in a receiving direction of the second claw portion from a distal end side that is a receiving side of the second claw portion. , While having a rounded surface formed between the first side guide slope surface and a rising surface rising from the inner peripheral surface of the pillar portion ,
The guide sliding surface of the second claw portion starts to slide with the first side guide slope surface during the assembly operation on the distal end side which is the receiving side of the first claw portion in the axial direction. An outwardly convex guide curved surface giving a point is formed, and the second side slope of the flat downward slope corresponding to the first side guide slope surface in a form following the axial base end side with respect to the guide curved surface A rolling bearing retainer having a surface formed thereon.   In the guide sliding surface of the second claw portion, the guide curved surface is an outwardly projecting guide radius surface, and the second side inclined surface is a flat surface that coincides with the tangential direction at the end of the guide radius surface The rolling bearing retainer according to claim 1, which is in a downward inclined form.   The bottom surface of the first recess is formed as a horizontal bottom surface parallel to the axial direction, and in the second claw portion, adjacent to the axial direction base end side with respect to the second side inclined surface, The rolling bearing retainer according to claim 2, wherein a horizontal contact surface that contacts the horizontal bottom surface is formed, and a gap is formed between the second inclined surface and the horizontal bottom surface.

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