JP6398184B2 - Cage & Roller - Google Patents

Description

  The present invention relates to a cage and roller, and more particularly, to a cage and roller mounted on a rotation support portion of an engine rocker arm, for example.

  Conventionally, in order to improve fuel efficiency and to reduce the size of the rocker arm, a needle bearing has been used for the support part of the engine rocker arm to reduce the operating torque, and the outer diameter of the cam follower is equal to or equal to the outer diameter of the needle bearing. The structure of the rocker arm as described below is disclosed (for example, see Patent Document 1).

JP 2012-163057 A

  However, according to the structure of the rocker arm disclosed in Patent Document 1, the needle bearing that rotatably supports the rocker arm includes a shell outer ring, a cage, and a needle. Therefore, since the radial thickness of the needle bearing is determined by the plate thickness of the shell outer ring and the diameter of the needle, the reduction of the radial thickness of the needle bearing and the downsizing of the rocker arm are limited. The manufacturer that manufactures the rocker arm delivers the engine to the manufacturer that produces the rocker arm unit by pre-assembling the rocker arm and needle bearing, but the axial position of the rocker arm and needle bearing is positioned. There was room for improvement in assembly.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to assemble a cage and roller into a rocker arm in a state where an axial position is positioned, and to a rocker arm. It is to provide a cage and roller that can be easily assembled.

The above object of the present invention can be achieved by the following constitution.
( 1 ) a plurality of needles that are rolling elements;
A pair of annular rim portions provided at intervals in the axial direction, and a plurality of column portions disposed at intervals in the circumferential direction between the rim portions, and adjacent to each other in the circumferential direction. A resin cage that rotatably holds a plurality of needles in a plurality of pockets each defined by a matching column portion and both rim portions;
A cage and roller that can be attached to an outer ring equivalent member having a support hole that constitutes the raceway surface of the needle on the inner peripheral surface,
The cage is constituted by a pair of substantially semi-cylindrical cage elements formed in the same shape,
The pair of retainer elements are formed in a semicircular shape at one end in the axial direction, and a first rim portion having a pair of engaging protrusions protruding in the circumferential direction from both circumferential end surfaces thereof,
It is formed in a semi-annular shape at the other end in the axial direction, and can be brought into contact with or opposed to a pair of engaged portions that can engage with the engaging protrusions on both end surfaces in the circumferential direction and the side surface of the outer ring equivalent member. A second rim portion having a collar portion;
A plurality of pillars disposed between the first and second rim parts at intervals in the circumferential direction, and
The retainer engages the engagement protrusion and the engaged portion of the pair of retainer elements, and the first rim portion of one of the pair of retainer elements and the second rim portion of the other of the pair of retainer elements. Each of the pair of rim parts is constituted by the other first rim part of the pair of retainer elements and one second rim part of the pair of retainer elements.
The cage and roller characterized in that the flanges of the pair of cage elements are in contact with or opposed to both side surfaces of the outer ring equivalent member.
( 2 ) The engaged portion is configured by the axial side surface of the step portion formed by separating the flange portion from the circumferential end surfaces in the circumferential direction,
The cage and roller according to ( 1 ), wherein an axial side surface of the first rim portion and an axial side surface of the second rim portion are flush with each other.

According to cage & roller of the present invention, the retainer is constituted by a pair of retainer elements substantially semi-cylindrical shape formed in the same shape, a pair of retainer elements, the peripheral from the circumferential end surface A first rim portion having a pair of engaging protrusions protruding in the direction, a pair of engaged portions engageable with the engaging protrusion portions on both end surfaces in the circumferential direction, and a side surface of the outer ring equivalent member A second rim portion having a flange portion that can be opposed to the first rim portion; and a plurality of column portions that are spaced apart in the circumferential direction between the first and second rim portions; The first rim portion of the pair of retainer elements, the other second rim portion of the pair of retainer elements, and the other first rim of the pair of retainer elements. The pair of rim portions are respectively formed by the second rim portion of the pair and one of the pair of cage elements, thereby forming a cylindrical shape. The flange portion of the retainer elements, respectively abut or face the side surfaces of the outer ring member. Also in this case, it can be easily mounted in the support hole of the outer ring equivalent member from the axial direction. Further, the attached cage can be positioned in the axial direction by the flanges of the pair of cage elements coming into contact with or opposed to both side surfaces of the outer ring equivalent member. Furthermore, a cage having a good weight balance can be configured by combining cage elements having the same shape from the left and right direction.

It is a side view of the cam follower device in which the cage & roller concerning the present invention was incorporated. It is a perspective view of the holder | retainer which comprises the cage & roller which concerns on 1st Embodiment of this invention. It is principal part sectional drawing which shows the state in which the cage & roller shown in FIG. 2 was integrated in the outer ring equivalent member. It is a principal part expanded sectional view which shows the pocket shape of a holder | retainer. It is a principal part expanded sectional view which shows the other pocket shape of a holder | retainer. It is a side view of the cage & roller concerning a 2nd embodiment of the present invention. It is principal part sectional drawing which shows the state in which the cage & roller shown in FIG. 6 was integrated in the outer ring equivalent member. It is a perspective view of the holder | retainer which comprises the cage & roller which concerns on 3rd Embodiment of this invention. It is principal part sectional drawing which shows the state in which the cage & roller shown in FIG. 8 was integrated in the outer ring equivalent member. It is a perspective view of the holder | retainer which comprises the cage & roller which concerns on 4th Embodiment of this invention. It is a figure which shows the state in which the cage & roller shown in FIG. 10 was integrated in the outer ring equivalent member. It is explanatory drawing which shows the procedure which incorporates the cage & roller shown in FIG. 10 in an outer ring equivalent member. It is a principal part expansion perspective view which shows the engagement protrusion part and to-be-engaged part of the cage & roller which concern on 5th Embodiment. It is a figure which shows the state in which the cage & roller shown in FIG. 13 was integrated in the outer ring equivalent member.

  Hereinafter, embodiments of the cage and roller according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
First, a cam follower device 1 in which a cage and roller 30 according to the present invention is mounted in a support hole (rotation support portion) 4a of a rocker arm 4 will be described with reference to FIG.

  In the cam follower device 1, a high-speed cam 3a and a low-speed cam 3b are supported on a camshaft 2 that rotates in synchronization with a crankshaft of an engine (not shown) so as to be slidable in the axial direction (front and back direction in FIG. 1). . A rocker arm 4 that receives the movement of these cams 3a and 3b is disposed at a position facing the high-speed cam 3a or the low-speed cam 3b that slides in the axial direction. The rocker arm 4 has a support hole 4a in which the cage & roller 30 is mounted at an intermediate portion in the longitudinal direction (left and right direction in FIG. 1), and via a rocker shaft 5 inserted through the cage & roller 30. And is rotatably supported by a cylinder head (not shown).

  An adjustment bolt 6 is screwed to the base end portion (left end portion in FIG. 1) of the rocker arm 4, and this adjustment bolt 6 is fastened and fixed by a lock nut 6a. Then, the end of the adjustment valve 6 (lower end in FIG. 1) is the end of the engine valve 7 (upper end in FIG. 1) that is an intake valve or exhaust valve supported so as to be reciprocally movable by a cylinder head (not shown). Are in contact. The engine valve 7 is always urged in the valve closing direction (direction in contact with the adjusting bolt 6) by the valve spring 8, so that the rocker arm 4 is always urged clockwise in FIG. .

  On the other hand, a pair of support wall portions 9 are provided at a distal end portion (right end portion in FIG. 1) of the rocker arm 4 with a space between each other. It is attached.

  The tappet roller bearing 10 is disposed between the pair of support wall portions 9, and the tappet roller 11 in which the outer peripheral surfaces of the high speed cam 3 a and the low speed cam 3 b abut on the outer peripheral surface and the shaft hole of the pair of support wall portions 9. Both end portions are supported by 9a, and a support shaft 20 that rotatably supports the tappet roller 11 is provided. The support shaft 20 is made of a hollow or solid shaft member made of steel, and both ends thereof are fixed by caulking into shaft holes 9 a formed in the pair of support wall portions 9.

  The rocker arm 4 is unitized as a rocker arm unit 15 by inserting the cage & roller 30 through the support hole 4 a and is incorporated into the cam follower device 1.

  In the cam follower device 1 configured as described above, the tappet roller 11 is brought into contact with the outer peripheral surface of the high speed cam 3a or the low speed cam 3b by the urging force of the valve spring 8, and in this state, the cam shaft 2 is rotated. The rocker arm 4 is converted into a reciprocating rocking motion about the rocker shaft 5, and the lift amount of the engine valve 7 is variable, while the engine valve 7 is resisted against the urging force of the valve spring 8 or the valve spring 8. It is reciprocated in the axial direction by the urging force. As a result, an opening / closing operation of an intake port or an exhaust port provided in a cylinder head (not shown) is performed.

  Next, the cage & roller 30 mounted in the support hole 4a of the rocker arm 4 will be described. As shown in FIGS. 2 and 3, the cage and roller 30 of the present embodiment includes a plurality of needles 31 that are rolling elements and a resin-made cage 40 that rotatably holds the plurality of needles 31. Prepare.

  The retainer 40 includes a pair of annular rim portions 41 provided at intervals in the axial direction, and a plurality of column portions 42 disposed between the rim portions 41 at intervals in the circumferential direction. And a plurality of pockets 43 are defined by the column part 42 and the rim parts 41 adjacent to each other in the circumferential direction. A plurality of needles 31 are rotatably held in the plurality of pockets 43, respectively.

  Engaging protrusions 44 having a diameter D1 that is set slightly larger than the diameter D2 of the track surface 4b of the support hole 4a are provided on the outer peripheral surfaces 41a of both rim portions 41. In addition, conical inclined surfaces 41b that are gradually reduced in diameter toward the outer side in the axial direction are formed at both axial ends of the outer peripheral surfaces 41a of both the rim portions 41.

  As shown in FIGS. 1 and 3, the cage & roller 30 configured as described above is attached to the support hole 4 a of the rocker arm 4 for the engine and assembled as the rocker arm unit 15.

  The cage & roller 30 is incorporated into the rocker arm 4 by inserting the cage 40 into the support hole 4a of the rocker arm 4 from the inclined surface 41b side and pushing it in the axial direction. Thereby, the rim | limb part 41 is elastically deformed according to the cone-shaped inclined surface 41b, and is inserted in the support hole 4a of the rocker arm 4, reducing a diameter.

  When the retainer 40 is inserted to a predetermined position, the rim portion 41 that has been reduced in diameter returns to its original state by being elastically restored, and the rim portions 41 that are larger in diameter than the diameter D2 of the raceway surface 4b are engaged. The protrusion 44 engages with a step portion 4d between the large diameter portion 4c and the raceway surface 4b formed at the end of the rocker arm 4 so that the cage & roller 30 is axially relative to the rocker arm 4. As the position is determined, the cage & roller 30 and the rocker arm 4 are not separated.

  Generally, since the rocker arm 4 is carburized, the inner peripheral surface of the support hole 4a can be used as the outer ring raceway surface 4b, and the cage and roller 30 having no outer ring can be used. Accordingly, since the radial thickness of the cage & roller 30 is determined by the diameter of the needle 31, the radial thickness of the bearing portion is reduced, and the rocker arm unit 15 can be downsized.

  Further, the cage & roller 30 and the rocker arm 4 are unitized as a rocker arm unit 15 and can be delivered from the manufacturer that produces the rocker arm to the manufacturer that produces the engine, and the handling of the rocker arm unit 15 becomes easy. Assembling workability to the engine is improved.

  Further, as an assembly procedure for assembling the needle 31 into the pocket 43 of the retainer 40, the retainer 40 is assembled in advance to the support hole 4 a of the rocker arm 4, and the needle 31 is inserted into the pocket 43 of the retainer 40. There are a method of assembling and a method of assembling the retainer 40 in which the needle 31 is preliminarily assembled in the pocket 43 into the support hole 4a of the rocker arm 4, and the shape of the pocket 43 is made the optimum shape according to the assembling procedure. It is preferable.

  FIG. 4 shows a shape of a pocket 43 suitable for incorporating the needle 31 into the pocket 43 after the retainer 40 is assembled to the support hole 4 a of the rocker arm 4. Side locking protrusions 42a are provided. Then, the needle 31 is pushed into the pocket 43 and assembled from the inner diameter side of the retainer 40 incorporated in the support hole 4a of the rocker arm 4 while elastically deforming the column portion 42 and the inner diameter side locking projection 42a.

  In the retainer 40, the circumferential width Wp of the pocket 43 at a portion removed from the inner diameter side locking projection 42a is larger than the outer diameter Dk of the needle 31 (Wp> Dk). In the pocket 43, it can roll with a light force. Further, since the interval Wi between the tip ends of the pair of inner diameter side locking projections 42a is smaller than the outer diameter Dk of the needle 31 (Dk> Wi), the needle 31 does not fall out of the pocket 43. .

  FIG. 5 shows a shape of the pocket 43 suitable when the needle 31 is assembled in the pocket 43 of the retainer 40 and then assembled into the support hole 4a of the rocker arm 4. A locking projection 42a is provided, and an outer diameter side locking projection 42b is provided on the outer diameter side surface. Then, the needle 31 is pushed into the pocket 43 and assembled while elastically deforming the column portion 42, the inner diameter side locking projection 42 a and the outer diameter side locking projection 42 b of the cage 40. Then, the cage 40 in which the needle 31 is assembled in the pocket 43 is assembled in the support hole 4 a of the rocker arm 4.

  In the retainer 40, the circumferential width Wp of the pocket 43 at a portion removed from the inner diameter side locking projection 42 a and the outer diameter side locking projection 42 b is larger than the outer diameter Dk of the needle 31. (Wp> Dk), the needle 31 can roll in the pocket 43 with a light force. Further, the interval Wi between the tip ends of the pair of inner diameter side locking projections 42a is smaller than the outer diameter Dk of the needle 31 (Dk> Wi), and the tip ends of the pair of outer diameter side locking projections 42b. Since the interval Wo between them is smaller than the outer diameter Dk of the needle 31 (Dk> Wo), the held needle 31 does not fall out of the pocket 43.

  The inner diameter side locking projection 42 a and the outer diameter side locking projection 42 b may be formed over the entire length of the column portion 42, or may be formed in a part of the column portion 42. Further, it can be divided into a plurality of parts. Further, the inner diameter side locking projections 42a and the outer diameter side locking projections 42b do not need to coincide with each other in the axial direction.

  Examples of the resin forming the cage 40 include aromatic polyamide (aromatic PA), polyamide 46, polyamide 6, polyamide 66 such as polyamide 66, polyphenylene sulfide (PPS), polyether ether ketone (PEEK). ), A fluororesin such as polyacetal (POM), polytetrafluoroethylene (PTFE), or the like can be used. Moreover, what mixed reinforcing materials, such as glass fiber and carbon fiber, into these resin can also be used conveniently. More preferably, the polyamide resin is mixed with glass fiber or carbon fiber in an amount of 5 to 30% by weight, and the flexural modulus is 2000 to 5000 MPa. If it is the thing of this range, a deformable part can be given a deformability more suitably, and required rigidity can be ensured.

As described above, according to the cage & roller 30 of the present embodiment, the outer peripheral surface 41a of at least one rim portion 41 of the retainer 40 is elastically deformed when inserted into the support hole 4a of the rocker arm 4. The retainer 40 is provided with an engaging projection 44 that is elastically restored after insertion and engages with the rocker arm 4 to position the axial position of the retainer 40 relative to the rocker arm 4. It can be easily mounted in the support hole 4a of the rocker arm 4 from the axial direction in a state where the diameter is reduced by pressing in the radial direction. Further, the mounted retainer 40 is positioned in the axial direction by the engagement projection 44 engaging the rocker arm 4.
Furthermore, since the engaging protrusion 44 is formed over the entire circumference of the outer peripheral surface 41a of the rim 41, the axial position is more reliably positioned.
In the present embodiment, the engagement protrusions 44 are formed over the entire circumference of the rim 41, but may be formed in a part of the circumferential direction, or a plurality of the engagement protrusions 44 may be formed in the circumferential direction. Also good.

(Second Embodiment)
Next, with reference to FIG.6 and FIG.7, 2nd Embodiment of the cage & roller 30 which concerns on this invention is described. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.

  The cage 40 of the cage and roller 30 according to the present embodiment includes an engagement protrusion 44 that protrudes radially outward from the outer peripheral surface 41a of one rim portion 41A. The engagement protrusion 44 is substantially trapezoidal when viewed from the axial direction (see FIG. 6), and when viewed from the circumferential direction, as shown in FIG. 7, a vertical wall that rises vertically from the axially outer side of the outer peripheral surface 41a. 44a and an inclined surface 44b that gradually decreases in diameter toward the inner side in the axial direction.

  The support hole 4a of the rocker arm 4 into which the cage & roller 30 is incorporated is provided with a large diameter portion 4c at an axial end facing the rim portion 41A, and a boundary portion between the large diameter portion 4c and the raceway surface 4b. Is provided with an annular groove 4e which is an engaged portion. The cage & roller 30 is inserted into the support hole 4a of the rocker arm 4 from the other rim portion 41B on the opposite side to the engagement projection portion 44, and the inclined surface 44b is brought into contact with the large diameter portion 4c. When the cage & roller 30 is further pushed in the axial direction, one rim portion 41A is elastically deformed by the action of the inclined surface 44b of the engaging projection 44, and is inserted into the support hole 4a of the rocker arm 4 while being reduced in diameter. Is done.

When the engaging projection 44 reaches the annular groove 4e, the reduced rim portion 41A returns to its original state by elastic recovery, and the vertical wall 44a and the inclined surface 44b of the engaging projection 44 are The cage & roller 30 is positioned relative to the rocker arm 4 in the axial direction by engaging with the outer and inner surfaces of the annular groove 4e, and the cage & roller 30 and the rocker arm 4 are not connected. It becomes separation.
About another structure and an effect, it is the same as that of the said 1st Embodiment.
In addition, in this embodiment, although the engagement protrusion part is the structure formed in one place in the circumferential direction, two or more may be provided in the circumferential direction and may be formed over the perimeter.

(Third embodiment)
Next, with reference to FIG.8 and FIG.9, 3rd Embodiment of the cage & roller 30 which concerns on this invention is described. The one rim portion 41A of the cage 40 of the present embodiment has a conical inclined surface 44c that gradually increases in diameter from the axial end surface toward the inner side in the axial direction, and a radial direction from the inner side in the axial direction of the inclined surface 44c. An engaging projection 44 is provided by the vertical wall 44d. The other rim portion 41B is provided with a flange portion 46 that extends radially outward at the axial end surface.

  In the cage & roller 30 of the present embodiment, when the cage 40 is pushed into the support hole 4a of the rocker arm 4 from the inclined surface 44c side, one rim portion 41A is elastically deformed according to the inclined surface 44c and the diameter thereof is reduced. The rocker arm 4 is inserted into the support hole 4a. The vertical wall 44 d engages with one side surface 4 f of the rocker arm 4, and the flange 46 engages with the other side surface 4 g of the rocker arm 4, so that the cage and roller 30 is relative to the rocker arm 4. Thus, the axial position is positioned, and the cage & roller 30 and the rocker arm 4 are not separated.

As described above, according to the cage and roller 30 of the present embodiment, the other rim portion 41B of the retainer 40 includes the flange portion 46 that can come into contact with the side surface 4g of the rocker arm 4, 46 is brought into contact with the other side surface 4g of the rocker arm 4, and the vertical wall 44d formed on the one rim portion 41A is engaged with the one side surface 4f of the rocker arm 4, thereby ensuring the axial position. Positioned.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

(Fourth embodiment)
Next, a fourth embodiment of the cage and roller 30 according to the present invention will be described with reference to FIGS. 10 is a perspective view of a cage constructed by combining a pair of cage elements, FIG. 11 is a diagram showing a state in which the cage and roller are incorporated in a rocker arm (a member corresponding to an outer ring), and FIG. 12 is a cage and roller. It is explanatory drawing which shows the procedure which incorporates into a rocker arm.

  The cage 40 of the present embodiment has a configuration in which a pair of substantially semi-cylindrical cage elements 50A and 50B formed in the same shape are combined in a cylindrical shape. Each retainer element 50A, 50B has a semicircular first and second rim portions 51A, 51B provided at intervals in the axial direction, and a circumferential interval between both rim portions 51A, 51B. A plurality of column portions 52 arranged in an open manner are provided, and a plurality of pockets 53 are formed by the column portions 52 adjacent to each other in the circumferential direction and the rim portions 51A and 51B.

  The circumferential end surface 55 of one of the first rim portions 51A of the cage elements 50A and 50B includes an inclined surface 54a that is inclined so that the height gradually increases inward from the axial end surface, and an axis of the inclined surface 54a. An engaging projection 54 formed in a substantially triangular shape is provided by a vertical wall 54b extending in the radial direction from the inner side surface in the direction. The other rim portion 51 </ b> B is provided with a flange portion 56 extending radially outward and an outer surface 56 a of the flange portion 56 as an engaged portion that engages with the engagement protrusion 54.

  The pair of cage elements 50A and 50B having such a shape are inserted into the support holes 4a of the outer ring equivalent member from opposite directions, and the first rim portion 51A of one cage element 50A is inserted into the other cage element. 50B, the second rim portion 51B of one retainer element 50A is opposed to the first rim portion 51A of the other retainer element 50B, and the first rim portion 51A The circumferential end surface 55 and the circumferential end surface 55 of the second rim portion 51B are overlapped in the circumferential direction to form a cylindrical shape, and each retainer element 50A, 50B has an engagement protrusion 54 of the first rim portion 51A. The cage 40 is configured by engaging with the outer side surface 56a of the flange portion 56 of the second rim portion 51B which is the engaged portion.

  That is, as shown in FIG. 12, a pair of retainer elements 50A, 50B are arranged on both the left and right sides of the rocker arm 4, and the support holes of the rocker arm 4 from the first rim portion 51A side where the engaging projections 54 are provided. Inserted into 4a until the flanges 56 of both retainer elements 50A, 50B come into contact with the side surfaces 4f, 4g of the rocker arm 4. As a result, the engagement protrusions 54 of both the cage elements 50A and 50B are elastically restored and engage with the outer surface 56a of the flange 56 of the counterpart cage elements 50A and 50B (see FIG. 11).

Therefore, both retainer elements 50A and 50B are engaging protrusions that engage the flange 56 that contacts the side surfaces 4f and 4g of the rocker arm 4 and the outer surface 56a of the flange 56 of the counterpart retainer elements 50A and 50B. The position in the axial direction is positioned by the portion 54, and the cage 40 is assembled to the rocker arm 4 without being separated.
Also in this embodiment, the retainer 40 may be assembled in advance to the support hole 4a of the rocker arm 4, and the needle 31 may be assembled in the pocket 53 of the retainer 40, or the needle 31 may be assembled in advance. May be assembled in the support hole 4 a of the rocker arm 4.

  As described above, according to the cage and roller 30 of the present embodiment, the cage 40 is constituted by the pair of substantially semi-cylindrical cage elements 50A and 50B formed in the same shape, and the pair of cages. The elements 50A and 50B include a first rim portion 51A having a pair of engaging projections 54 protruding in the circumferential direction from both circumferential end surfaces thereof, and a pair capable of engaging with the engaging projections 54 on both circumferential end surfaces. A second rim portion 51B having an outer surface 56a of the flange portion 56 that is the engaged portion of the rocker arm and having a flange portion 56 that can contact or face the side surfaces 4f and 4g of the rocker arm 4; And a plurality of column parts 52 arranged at intervals in the circumferential direction between the two rim parts 51A and 51B. Then, the retainer 40 engages the engaging protrusion 54 and the outer surface 56a of the flange 56, and the first rim portion 51A of one of the pair of retainer elements 50A and 50B and the pair of retainer elements 50A, A pair of rims includes the other second rim portion 51B of 50B, the other first rim portion 51A of the pair of retainer elements 50A and 50B, and the second rim portion 51B of one of the pair of retainer elements 50A and 50B. By forming each part 41, it is formed in a cylindrical shape. Further, the flange portions 56 of the pair of cage elements 50A and 50B are in contact with or opposed to both side surfaces 4f and 4g of the rocker arm 4, respectively. Also in this case, the rocker arm 4 can be easily attached to the support hole 4a from the axial direction. Further, the attached retainer 40 can be positioned in the axial direction by the flange portions 56 of the pair of retainer elements 50A and 50B being in contact with or opposed to the both side surfaces 4f and 4g of the rocker arm 4. . Furthermore, the retainer 40 with a good weight balance can be configured by combining retainer elements 50A and 50B having the same shape from the left and right reverse directions.

(Fifth embodiment)
Next, with reference to FIG.13 and FIG.14, 5th Embodiment of the cage & roller 30 which concerns on this invention is described.

  The cage 40 according to the fifth embodiment has a configuration in which a pair of cage elements 50A and 50B are combined in the same manner as the cage 40 according to the fourth embodiment. The retainer 40 of the present embodiment is configured so that the axial side surface of the stepped portion formed by separating the flange portions 56 of both the retainer elements 50A and 50B from the circumferential end surface 55 in the circumferential direction, It is set as the to-be-engaged part 57 engaged with the engagement protrusion part 54 of element 50A, 50B.

Thereby, in the cage & roller 30 of the fourth embodiment, the axial side surface of the first rim portion 51A protrudes in the axial direction from the axial side surface of the second rim portion 51B (the outer surface 56a of the flange portion 56). On the other hand (see FIG. 11), in the cage and roller 30 of the present embodiment, the axial side surface of the first rim portion 51A and the axial side surface of the second rim portion 51B are flush with each other, and the size is reduced.
About another structure and an effect, it is the same as that of the said 4th Embodiment.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, the mating member into which the cage & roller 30 is incorporated is not limited to the rocker arm 4, and is similarly applied to an outer ring or a housing that does not have a guide portion for regulating the axial position of the cage & roller 30. be able to.

4 Rocker arm (outer ring equivalent member)
4a Support hole 4b Raceway surface 4f, 4g Side surface 30 Cage & roller 31 Needle (rolling element)
40 Cage 41, 41A, 41B Rim part 41a Peripheral surface 42, 52 Column part 43, 53 Pocket 44, 54 Engagement protrusions 46, 56 Cage part 50A, 50B Cage element 51A First rim part 51B Second rim part 55 circumferential end face 57 engaged portion

Claims (2)

A plurality of needles that are rolling elements;
A pair of annular rim portions provided at intervals in the axial direction, and a plurality of column portions disposed at intervals in the circumferential direction between the rim portions, and adjacent to each other in the circumferential direction. A resin-made cage that rotatably holds the plurality of needles in a plurality of pockets respectively defined by the column portions and the rim portions to be fitted;
A cage and roller that can be attached to a member corresponding to an outer ring having a support hole that forms a raceway surface of the needle on an inner peripheral surface,
The cage is constituted by a pair of substantially semi-cylindrical cage elements formed in the same shape,
The pair of retainer elements are formed in a semicircular shape at one end in the axial direction, and a first rim portion having a pair of engaging protrusions protruding in the circumferential direction from both circumferential end surfaces thereof;
A semi-annular shape is formed at the other end in the axial direction, and a pair of engaged portions that can be engaged with the engaging protrusions on both end surfaces in the circumferential direction, and a side surface of the outer ring equivalent member A second rim portion having a possible flange portion, and the plurality of pillar portions arranged at intervals in the circumferential direction between the first and second rim portions,
The retainer engages the engagement protrusion and the engaged portion of the pair of retainer elements, and the first rim portion of one of the pair of retainer elements and the pair of retainer elements A pair of rim portions is configured by the other second rim portion of the first and second rim portions of the pair of retainer elements and the second rim portion of the pair of retainer elements. Formed in a cylindrical shape,
The cage & roller according to claim 1, wherein the flanges of the pair of retainer elements are in contact with or opposed to both side surfaces of the outer ring equivalent member. The engaged portion is configured by an axial side surface of a stepped portion formed by separating the flange portion from the circumferential end surfaces in the circumferential direction;
2. The cage and roller according to claim 1 , wherein an axial side surface of the first rim portion and an axial side surface of the second rim portion are flush with each other.

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