JP5234705B2 - Roller bearing - Google Patents

Description

  The present invention relates to a roller bearing that supports a camshaft, a crankshaft, a rocker shaft, and the like for an automobile engine.

  A conventional bearing that supports a camshaft of an automobile engine is described in, for example, Japanese Patent Application Laid-Open No. 2005-90696 (Patent Document 1). Referring to FIG. 15, a camshaft 101 described in the publication includes a cam lobe 101a, a cylindrical journal portion 101b supported by a roller bearing 102, and an end large diameter portion 101c. .

  Here, the outer diameter of the journal portion 101b is smaller than the maximum outer diameter of the cam lobe 101a and the outer diameter of the large end portion 101c. For this reason, the roller bearing 102 disposed in the journal portion 101 b and rotatably supporting the camshaft 101 cannot be inserted from the axial direction of the camshaft 101.

  Accordingly, the roller bearing 102 is substantially divided into a plurality of rollers 103, a substantially semi-cylindrical holding body 104, 105 divided in the circumferential direction, and a circumferential direction divided between the cylinder head 108 and the cap 109. Semi-cylindrical lace plates 106 and 107 are provided. Referring to FIG. 16, the lace plate 107 has two protrusions 107a protruding radially outward at both ends in the circumferential direction, and the cap 109 has a recess 109a corresponding to the protrusion 107a.

  Further, it is described that by engaging the protrusion 107a and the recess 109a, relative movement in the circumferential direction and the axial direction between the race plate 107 and the cap 109 can be prohibited when the roller bearing 102 rotates. Has been. The configuration between the race plate 106 and the cylinder head 108 is similar.

The lace plates 106 and 107 having the above-described configuration are generally manufactured by pressing a steel plate such as a cold rolled steel plate (SPC). In addition, after forming into a predetermined shape, heat treatment is performed to obtain predetermined mechanical properties such as hardness.
JP-A-2005-90696

  In the roller bearing 102 described in the above publication, the protrusion 107a is formed by pushing the outer diameter surface by applying a radially outward force to the inner diameter surface of the race plate 107. As a result, a recess is formed on the inner diameter surface of the race plate 107 that becomes the raceway surface of the roller 103. This causes vibrations to occur when the roller 103 passes over the indentation, and causes the roller 103 to rotate smoothly, such as the surface of the roller 103 peeling off early.

  Furthermore, the lubricating oil flows into the roller bearing 102 from oil holes (not shown) provided in the race plates 106 and 107 or oil holes (not shown) provided in the camshaft 101. The lubricating oil flow is blocked by the cages 104 and 105 and cannot be supplied uniformly to the entire bearing.

  This problem can occur not only in the roller bearing that supports the camshaft but also in the bearing that supports the crankshaft and the rocker shaft.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a roller bearing that supports a camshaft or the like of an automobile engine and has excellent lubricity.

  A roller bearing according to the present invention maintains an interval between an outer ring formed by connecting a plurality of arc-shaped outer ring members in a circumferential direction, a plurality of rollers disposed along an inner diameter surface of the outer ring, and adjacent rollers. A cage. The cage has an oil passage penetrating in the radial direction.

  By dividing the outer ring into a plurality of outer ring members as in the above configuration, the bearing can be applied to a place where the bearing cannot be inserted from the axial direction, such as a camshaft. Further, by providing an oil passage penetrating in the radial direction in the cage, the lubricating oil flowing into the roller bearing is evenly supplied to the entire bearing, so that a roller bearing having excellent lubricity can be obtained.

  As one embodiment, the retainer has a pair of ring portions, a plurality of column portions arranged between the pair of ring portions, and a pocket for accommodating the rollers between the adjacent column portions, and an oil passage Is provided on the pillar. More preferably, the pillar portion further includes an oil groove that communicates adjacent pockets in the circumferential direction.

  As another embodiment, the cage includes a plurality of independent pocket portions that accommodate the rollers and a connecting portion that connects the plurality of pocket portions in the circumferential direction, and the oil passage is between adjacent pocket portions. Provided. As still another embodiment, the cage has a plurality of pockets for accommodating the rollers in two rows in the axial direction, and the oil passage is provided between the two pocket rows.

  Preferably, the outer ring member has an engaging claw bent outward in the radial direction so as to engage with the housing at the circumferential end. Thereby, it can prevent that an outer ring | wheel rotates in a housing at the time of bearing rotation.

  According to this invention, it is possible to obtain a roller bearing that can reliably position the outer ring member within the housing and that is excellent in lubricity.

  With reference to FIGS. 1-14, the needle roller bearing 21 as a roller bearing which concerns on one Embodiment of this invention, and the camshaft support structure which uses this needle roller bearing 21 are demonstrated. 1 and 12 to 14 are views showing the state before and after the camshaft support structure according to the embodiment of the present invention is assembled, and FIGS. 2 to 11 are needle roller bearings according to the embodiment of the present invention. It is a figure which shows each component of 21.

  First, referring to FIG. 1, a camshaft support structure according to an embodiment of the present invention includes a camshaft 19, a cylinder head 13 and a bearing cap 13 c as a housing for housing the camshaft 19, and the camshaft 19. And a needle roller bearing 21 that rotatably supports the housing.

  The needle roller bearing 21 includes an outer ring 22 formed by connecting a plurality of arc-shaped outer ring members 22 a and 22 b in the circumferential direction, and a needle roller 23 as a plurality of rollers disposed along the inner diameter surface of the outer ring 22. And a cage 24 having a parting line extending in the axial direction of the bearing at one place on the circumference and holding the intervals between the plurality of needle rollers 23.

  As a bearing for supporting the camshaft 19, a needle roller bearing 21 is generally employed. The needle roller bearing 21 has an advantage that a high load capacity and high rigidity can be obtained for a small bearing projection area because the needle roller 23 and the raceway surface are in line contact. Therefore, it is preferable in that the thickness dimension in the radial direction of the support portion can be reduced while maintaining the load capacity.

  The outer ring member 22a will be described with reference to FIGS. 2 is a side view of the outer ring member 22a, FIG. 3 is a view of FIG. 2 viewed from the III direction, and FIG. 4 is a view of FIG. 2 viewed from the IV direction. Further, since the outer ring member 22b has the same shape as the outer ring member 22a, description thereof is omitted.

  First, referring to FIG. 2, the outer ring member 22 a has a semicircular shape with a central angle of 180 °, and is bent radially outward so as to engage with the cylinder head 13 at one circumferential end. And claw portions 22d that protrude radially inward at both ends in the axial direction and restrict movement of the cage 24 in the axial direction. The two outer ring members 22a and 22b are connected in the circumferential direction to form an annular outer ring 22. The central portion in the axial direction of the inner diameter surface of the outer ring 22 functions as a raceway surface of the needle rollers 23.

  Also, referring to FIG. 3, two engaging claws 22c are provided at both ends in the axial direction at one end in the circumferential direction of the outer ring member 22a, and between the two engaging claws 22c. Is formed with a substantially V-shaped recess 22e recessed in the circumferential direction. The two engaging claws 22c are arranged on both ends and on a straight line parallel to the rotational axis of the needle roller bearing 21 so as to avoid the central portion in the axial direction as the raceway surface of the outer ring member 22a. Preferably, the length L between the two engaging claws 22c is set to be longer than the effective length l of the needle roller 23. In the present specification, the “effective length of the roller” refers to a length obtained by removing the length of the chamfered portions at both ends from the roller length.

  Further, referring to FIG. 4, at the other circumferential end of outer ring member 22a, two flat portions 22f having the same width as the axial width of engagement claw 22c are provided at two axial ends and two flat portions. Between the portions 22f, a substantially V-shaped convex portion 22g having a circular arc tip and protruding in the circumferential direction is provided. The concave portion 22e receives the convex portion 22g of the adjacent outer ring member when the outer ring members 22a and 22b are connected in the circumferential direction.

  Here, a certain amount of gap is formed in the circumferential direction and the axial direction at the abutting portions of the adjacent outer ring members 22a and 22b in consideration of dimensional changes due to thermal expansion of the outer ring members 22a and 22b. Therefore, when the circumferential end portions of the outer ring members 22a and 22b that face each other are formed in parallel to the axial direction, a groove extending in the axial direction is formed at the abutting portion. In this case, the needle roller 23 is fitted into the groove of the abutting portion when the bearing rotates, and the smooth rotation of the needle roller 23 is obstructed.

  Therefore, the needle roller 23 can be smoothly rotated by making the shape of the abutting portion substantially V-shaped. Note that the shape of the abutting portion of the outer ring members 22a and 22b is not limited to a substantially V shape, and may be any shape that allows the needle rollers 23 to rotate smoothly, for example, a substantially W shape.

  Referring to FIGS. 3 and 4, an oil hole 22 h that penetrates from the radially outer side to the radially inner side is provided on the outer diameter surface of outer ring member 22 a. The oil hole 22h is provided at a position corresponding to an oil passage (not shown) provided in the housing, and supplies lubricating oil into the needle roller bearing 21. Note that the size, position, and number of the oil holes 22h depend on the size, position, and number of oil passages provided in the housing.

  The outer ring member 22a having the above configuration is a shell outer ring formed by pressing a steel plate such as carbon steel. Specifically, after the overall shape of the outer ring member 22a and the engaging claws 22c and the flange portion 22d are formed by press working, heat treatment is performed to obtain predetermined mechanical properties such as hardness to obtain a finished product. .

  Next, the retainer 24 will be described with reference to FIGS. 5 is a side view of the cage 24, FIG. 6 is a partial cross-sectional view including a divided portion of the cage 24, and FIG. 7 is a diagram showing an oil passage formed in the cage 24. Referring to FIGS. 5 and 6, the retainer 24 has a substantially C shape having a parting line extending in the axial direction of the bearing at one place on the circumference, and a pocket 24 c that accommodates the needle rollers 23. It is provided at equal intervals in the circumferential direction. The cage 24 is formed by injection molding of a resin material.

  The cut end surface 24a on one side in the circumferential direction of the divided portion is provided with a recess 24d, and the cut end surface 24b on the other side is provided with a protrusion 24e corresponding to the recess 24d, and the recess 24d and the protrusion 24e are engaged. By combining, an annular retainer 24 can be obtained. In this embodiment, the width of the tip portion of the convex portion 24e is set larger than that of the root portion, and the width of the opening portion of the concave portion 24d is set smaller than that of the innermost portion. Thereby, the engagement between the concave portion 24d and the convex portion 24e is ensured.

  Further, referring to FIG. 7, the retainer 24 has a pair of ring portions 25a and 25b and a plurality of column portions 26 between the pair of ring portions 25a and 25b, and the column portions 26 are the left and right rings. The parts 25a and 25b are connected to form an integrated cage 24. Further, the cutting portions 24a and 24b are provided at one place of the ring portions 25a and 25b, and the pocket 24c is formed between the adjacent column portions 26.

  Further, the column portion 26 is provided with an oil groove 27 that communicates the adjacent pocket 24c in the circumferential direction and an oil passage 28 that penetrates the column portion 26 in the radial direction. The oil groove 27 is formed by denting the outer diameter surface at the axial center of the column portion, and the oil passage 28 penetrates from the bottom wall of the oil groove 27 to the inner diameter side.

  In the needle roller bearing 21 configured as described above, since the engaging claw 22c engages with the housing, the outer ring 22 can be reliably prevented from rotating within the housing during bearing rotation. Further, since the engaging claws 22c are formed by bending the circumferential end portions of the outer ring members 22a and 22b radially outward by bending, the raceway surface can be kept smooth. As a result, the needle rollers 23 can smoothly rotate on the raceway surface.

  Further, by providing the engaging claw 22c at a position deviated from the raceway surface of the outer ring member 22a, the minute deformation of the outer ring members 22a and 22b due to the bending process of the engaging claw 22c has an effect on the rotation of the needle roller 23. Can be minimized. As a result, the needle roller 23 rotates more smoothly.

  Further, the needle roller bearing 21 having the above-described configuration incorporated in the camshaft 19 is configured such that, for example, lubricating oil flowing in from the oil holes 22h provided in the outer ring members 22a and 22b is cammed through the inside of the needle roller bearing 21. The oil is discharged from an oil hole (not shown) provided in the shaft 19. However, when the lubricating oil cannot smoothly pass through the bearing, the lubricating oil staying in the bearing flows out from between the outer ring members 22a and 22b and the camshaft 19 to lubricate the needle roller bearing 21. Does not contribute. Therefore, by providing the retainer 24 with the oil groove 27 and the oil passage 28 and increasing the amount of lubricating oil passing through the inside of the bearing, the needle roller bearing 21 having excellent lubricity can be obtained.

  7 shows an example in which the oil groove 27 and the oil passage 28 are formed in the central portion in the axial direction of the column portion 26, the present invention is not limited to this, and the cage 24 may be formed at an arbitrary position. Is possible. Moreover, although the example which made the oil path 28 the circular cross section was shown, it is not restricted to this, Arbitrary shapes, such as a rectangular cross section, are employable.

  Next, another embodiment of the cage 24 will be described with reference to FIGS.

  First, referring to FIG. 8, retainer 64 has a pair of ring portions 65a and 65b and a plurality of column portions 66 arranged between the pair of ring portions 65a and 65b, and adjacent column portions. A pocket 64c for accommodating the needle roller 23 is formed between the two. An oil groove 67 extending in the circumferential direction is provided on the outer diameter surface of the pair of ring portions 65a and 65b, and an oil passage 68 penetrating in the radial direction is provided at the axial center portion of the column portion 66.

  The cage 64 having the above-described configuration is a modified example of the cage 24 shown in FIG. In addition, although the example which provided the oil groove 67 in each of the left and right ring parts 65a and 65b was shown in FIG. 8, you may provide only in either one, without restricting to this. Moreover, although the example which provided the oil groove 67 in the outer diameter surface of ring part 65a, 65b was shown in FIG. 8, it is not restricted to this, An inner diameter surface may be sufficient, Also good.

  Next, referring to FIG. 9, the retainer 34 includes a pair of ring portions 35 a and 35 b and a plurality of column portions 36 disposed between the pair of ring portions 35 a and 35 b, and adjacent columns. A pocket 34c for accommodating the needle roller 23 is formed between the portions 36. The column portion 35 is divided at the central portion in the axial direction, and an oil passage 37 through which the lubricating oil can move in the radial direction and the circumferential direction of the cage 34 is provided in the divided portion.

  Since the retainer 34 having the above-described configuration can make the oil passage 37 larger than the retainer 24 shown in FIG. 7, the amount of lubricating oil passing through the inside of the bearing can be further increased. However, since the pillar part 36 plays the role which connects the right and left ring parts 35a and 35b, the oil path 37 cannot be formed in all the pillar parts 36. In the embodiment shown in FIG. 9, the pillar portions 36 provided with the oil passage 37 and the pillar portions 36 not provided with the oil passage 37 are alternately arranged.

  Next, referring to FIG. 10, the retainer 44 has a plurality of independent pocket portions 45 that accommodate the needle rollers 23 and a connecting portion 46 that connects the plurality of pocket portions 45 in the circumferential direction. An oil passage 47 is formed between the adjacent pocket portions 45. This retainer 44 has only a minimum configuration necessary for retaining the interval between the adjacent needle rollers 23. Compared to the retainers 24 and 34 shown in FIGS. There is an advantage that the degree of freedom of the position and size of the oil passage 47 is very high.

  Next, referring to FIG. 11, the cage 54 includes a pair of first and second outer ring portions 55a and 55b at both axial ends, and a pair of first and second inner ring portions at the axial center portion. 56a, 56b and a plurality of pillars 57 connecting the four ring portions 55a, 55b, 56a, 56b, and a plurality of pockets 58 for accommodating the needle rollers 23 are arranged in two rows in the axial direction, that is, the first 1 formed between the outer ring portion 55a and the second inner ring portion 56a (right pocket row 58a) and between the second outer ring portion 55b and the second inner ring portion 56b (left pocket row 58b). . An oil passage 59 that penetrates the retainer 54 in the radial direction is formed between the two rows of pocket rows 58a and 58b, that is, between the first and second inner ring portions 56a and 56b.

  7 to 11, since the amount of lubricating oil passing through the inside of the bearing increases, the needle roller bearing 21 having excellent lubricity can be obtained. In the above embodiment, the example in which the lubricating oil flows from the oil holes 22h of the outer ring members 22a and 22b toward the oil holes (not shown) of the camshaft 19 has been described. The case where the lubricating oil flows from the 19 oil holes (not shown) toward the oil holes 22h of the outer ring members 22a and 22b can be similarly considered.

  Next, a procedure for incorporating the needle roller bearing 21 into the camshaft 19 will be described with reference to FIGS. 1 and 12 to 14.

  First, the needle rollers 23 are incorporated in the pockets 24 c of the cage 24. Next, using the elasticity of the cage 24, the divided portion is expanded and assembled into the camshaft 19. Further, the concave portion 24d and the convex portion 24e are engaged so that the retainer 24 does not come off.

  Next, on the cylinder head 13, the outer ring member 22a on one side, the cam shaft 19 incorporating the retainer 24, the outer ring member 22b on the other side, and the bearing cap 13c are assembled in this order, and the cylinder head 13 and the bearing cap 13c Is fixed with bolts. At this time, it arrange | positions so that the recessed part 22e of the outer ring member 22a, the convex part 22g of the outer ring member 22b, and the convex part 22g of the outer ring member 22a and the recessed part 22e of the outer ring member 22b may each face | match.

  Further, the engaging claw 22c of the outer ring member 22a is disposed so as to engage with the engaging groove 13d provided on the abutting surface of the cylinder head 13 with the bearing cap 13c, and the engaging claw 22c of the outer ring member 22b is It arrange | positions so that it may engage with the engaging groove 13d provided in the abutting surface with the cylinder head 13 of the bearing cap 13c. As a result, the outer ring members 22a and 22b can be prevented from rotating inside the housing during bearing rotation.

  Here, the abutting surface of the cylinder head 13 and the bearing cap 13c is generally a surface parallel to the axial direction of the camshaft 19, that is, the rotational axis of the bearing. Therefore, by disposing the two engaging claws 22c provided at the circumferential ends of the outer ring members 22a and 22b in a straight line parallel to the rotational axis of the needle roller bearing 21, the engaging claws 22c are connected to the cylinder head 13. And the bearing cap 13c.

  Referring to FIG. 12, in the needle roller bearing 21, the rotation direction of the camshaft 19, that is, the revolution direction of the needle roller 23, and the protruding direction of the convex portions 22g of the outer ring members 22a and 22b are matched. Placed in. Thereby, the needle roller 23 can rotate smoothly.

  When the revolving direction of the needle rollers 23 is opposite to the protruding direction of the convex portions 22g of the outer ring members 22a and 22b, the needle rollers 23 collide with the tips of the convex portions 22g of the outer ring members 22a and 22b when the bearing rotates. This is because there is a risk that the needle rollers 23 may be broken.

  By using the above assembling procedure, the camshaft 19, the outer ring 22, the cage 24, and the housing are arranged concentrically, and the needle roller bearing 21 in which the needle roller 23 can rotate stably is obtained. Can do. Further, the needle roller bearing 21 having the above configuration is incorporated from the radial direction of the support portion by dividing the outer ring 22 into two outer ring members 22a and 22b and dividing the cage 24 at one place in the circumferential direction. Therefore, it can be employed as a bearing for supporting the camshaft 19.

  Further, since the outer ring members 22a and 22b try to rotate in the direction opposite to the rotation direction of the camshaft 19, as a reaction, a load in the same direction as the rotation direction of the camshaft 19 acts on the engagement claw 22c from the housing. To do. Here, the engagement claw 22c is less likely to be damaged even if a large load is applied in the direction in which the outer ring member 22a is folded back in the circumferential direction (the direction of A in FIG. 2). If a load is applied in the direction (b) in FIG. 2, damage or the like may occur.

  Therefore, when the needle roller bearing 21 is arranged so that the rotation direction of the camshaft 19 and the protruding direction of the convex portions 22g of the outer ring members 22a and 22b coincide with each other, the engaging claw 22c is on the side where the concave portions 22e are formed. By providing them at the circumferential ends, the engagement claws 22c can be prevented from being damaged, and the outer ring members 22a and 22b can be positioned reliably.

  Further, the abutting portions of the outer ring members 22a and 22b are desirably arranged in the non-load region when the camshaft 19 is divided into a load region and a non-load region in the circumferential direction. The abutting portions of the outer ring members 22a and 22b are provided with a certain gap in the circumferential direction and the axial direction in consideration of expansion due to temperature rise. Therefore, when the abutting portion is disposed in the load region, smooth rotation of the needle roller 23 passing through the abutting portion may be hindered.

  In the present specification, the “load region” refers to a region where a relatively large load is applied in the circumferential direction of the outer ring members 22a and 22b. Further, the “non-load region” refers to a region where only a relatively small load is applied in the circumferential direction of the outer ring members 22a and 22b.

  In the above embodiment, an example in which the needle roller bearing 21 is employed as a bearing for supporting the camshaft 19 has been shown. However, the present invention is also applicable to other roller bearings such as a cylindrical roller bearing and a rod roller bearing. can do.

  Moreover, although the needle roller bearing 21 in said embodiment showed the example containing the outer ring | wheel 22, the needle roller 23, and the holder | retainer 24, it is not restricted to this, All the rollers which omitted the holder | retainer 24 were shown. It may be a type of roller bearing.

  Moreover, although the outer ring | wheel 22 in said embodiment showed the example divided | segmented into the outer ring members 22a and 22b in two places of the circumferential direction, it is possible to divide into arbitrary numbers without restricting to this. For example, the outer ring may be formed by connecting three outer ring members having a central angle of 120 ° in the circumferential direction. Furthermore, an annular outer ring may be formed by combining a plurality of outer ring members having different central angles. Similarly, the cage 24 can be of any form.

  In addition, the cages 24, 34, 44, and 54 in the above-described embodiment are examples of resin cages that have high production efficiency and high elastic deformability. It may be a machined cage or a press cage obtained by pressing a steel plate.

  Moreover, although the engagement claw 22c in the above-described embodiment has been shown as being provided only at one end of the circumferential ends of the outer ring members 22a and 22b, the present invention is not limited to this. It is good also as providing the engaging claw 22c in the circumferential direction both ends of the member 22a, and not providing in the outer ring member 22b. Moreover, although the engagement claw 22c showed the example provided in two places of the axial direction both ends, it should just be provided in at least one place in arbitrary positions, without restricting to this. For example, you may provide only in one place of the one side edge part of an axial direction, and you may provide only in one place of the axial direction center part.

  Moreover, although the collar part 22d in said embodiment showed the example provided in the circumferential direction whole region of the outer ring members 22a and 22b, it provided not only in this but partially provided in a part of the circumferential direction. Also good. At that time, the location and number of the buttocks can be arbitrarily set, but it is desirable that they are arranged in the non-load region when incorporated in the camshaft 19.

  Further, the needle roller bearing 21 in the above embodiment can be widely used not only as a bearing that supports the camshaft 19 but also as a bearing that supports the crankshaft 15, the rocker shaft, and the like.

  Further, the present invention can be applied to a single cylinder internal combustion engine, but supports a portion where the needle roller bearing 21 cannot be inserted from the axial direction like a journal portion 101b of a camshaft 101 as shown in FIG. It is suitable as a bearing.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The present invention is used for a roller bearing that supports a camshaft or the like of an automobile engine.

It is a figure which shows the state before the assembly of the camshaft support structure which concerns on one Embodiment of this invention. It is a figure which shows the outer ring member of the roller bearing which concerns on one Embodiment of this invention. It is the figure seen from the III direction of FIG. It is the figure seen from the IV direction of FIG. It is a figure which shows the side view of the holder | retainer of the roller bearing which concerns on one Embodiment of this invention. It is a fragmentary sectional view containing the division | segmentation part of the holder | retainer of FIG. It is the figure which looked at the retainer of the roller bearing which concerns on one Embodiment of this invention from the radial direction outer side, Comprising: It is a figure which shows an example of the oil path penetrated in radial direction. It is the figure which looked at the retainer of the roller bearing which concerns on one Embodiment of this invention from the radial direction outer side, Comprising: It is a figure which shows the example which provided the oil groove in the outer-diameter surface of a ring part. It is the figure which looked at the retainer of the roller bearing which concerns on one Embodiment of this invention from the radial direction outer side, Comprising: It is a figure which shows the other example of the oil path penetrated to radial direction. It is the figure which looked at the retainer of the roller bearing which concerns on one Embodiment of this invention from the radial direction outer side, Comprising: It is a figure which shows the other example of the oil path penetrated to radial direction. It is the figure which looked at the cage | basket of the double row roller bearing which concerns on one Embodiment of this invention from the radial direction outer side, Comprising: It is a figure which shows the other example of the oil path penetrated in radial direction. It is an enlarged view of the abutting part when the outer ring member of FIG. 2 is abutted. It is sectional drawing which looked at the state after the incorporation of the camshaft support structure of FIG. 1 from the axial direction. It is sectional drawing which looked at the state after the incorporation of the camshaft support structure of FIG. 1 from the radial direction. It is a figure which shows the conventional camshaft support structure. It is an enlarged view of the race board and cap of the roller bearing of FIG.

Explanation of symbols

  19, 101 Camshaft, 101a Cam lobe, 101b Journal part, 101c End large diameter part, 21 Needle roller bearing, 22 Outer ring, 22a, 22b Outer ring member, 22c Engagement claw, 22d collar part, 22e, 24d Recessed part, 22f Flat part, 22g, 24e Convex part, 22h Oil hole, 23 Needle roller, 24, 34, 44, 54, 64 Cage, 24a, 24b Cut end face, 24c, 34c, 58, 64c Pocket, 25a, 25b, 35a 35b, 55a, 55b, 56a, 56b, 65a, 65b Ring part, 26, 36, 47, 66 Pillar part, 27, 67 Oil groove, 28, 37, 47, 59, 68 Oil path, 45 Pocket part, 46 Connecting portion, 58a, 58b pocket row, 102 roller bearing, 103 rollers, 104, 105 holder, 106, 107 Over scan plates, 107a protrusion, 108 a cylinder head, 109 caps, 109a depression.

Claims (6)

An outer ring formed by connecting a plurality of arc-shaped outer ring members in the circumferential direction;
A plurality of rollers disposed along an inner diameter surface of the outer ring;
A retainer that holds the interval between the adjacent rollers,
The outer ring member is provided with an engaging claw that engages with the housing at at least one axial end of the circumferential one end.
The retainer has an oil passage penetrating in a radial direction,
The outer ring member is provided with an oil hole penetrating in a radial direction,
Each of the oil passage and the oil hole is a roller bearing provided at an axially central portion. The retainer has a pair of ring portions, a plurality of pillar portions disposed between the pair of ring portions, and a pocket for accommodating the rollers between the adjacent pillar portions,
The roller bearing according to claim 1, wherein the oil passage is provided in the column portion. The roller bearing according to claim 2, wherein the column portion further includes an oil groove that communicates the adjacent pockets in the circumferential direction. The retainer has a plurality of independent pocket portions that house the rollers, and a connecting portion that connects the plurality of pocket portions in a circumferential direction,
The roller bearing according to claim 1, wherein the oil passage is provided between adjacent pocket portions. The cage has a plurality of pockets for accommodating the rollers in two rows in the axial direction,
The roller bearing according to claim 1, wherein the oil passage is provided between the two pocket rows. The roller bearing according to claim 1 , wherein the engagement claw is provided by being bent radially outward .

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