JP4453574B2 - Assembly of cage and needle roller and thrust needle roller bearing - Google Patents

Description

  The present invention relates to an assembly of a cage and needle rollers and a thrust needle roller bearing.

  With reference to FIGS. 4A, 4B, 4C, and 4D, the case of a thrust needle roller bearing that has been conventionally used will be described.

FIG. 4A is a right half sectional view of the rotation center line X ₀ -X ₀ .

  FIG. 4B shows an assembly of a cage and needle rollers.

FIG. 4C is a partial front view of the cage as viewed from the arrow U _{0 in} FIG. 4B.

Figure 4D is a state viewed from the arrow _{V 0} which Figure 4B.

  A conventional thrust needle roller bearing will be described with reference to FIGS. 4A, 4B, 4C and 4D.

  The thrust needle roller bearing Hz holds the first raceway ring 1z and the second raceway ring 2z, the needle roller 3z interposed between the first raceway ring 1z and the second raceway ring 2z, and the needle roller 3z. In general, the cage is composed of the cage 4z.

  The first race 1z is formed from a thin steel plate by pressing. A flat portion serving as the first track 11z and a cylindrical portion 12z bent at a right angle to the flat portion are formed on the outer peripheral portion of the flat portion, and further radially inward at a right angle to the cylindrical portion at the end of the cylindrical portion. A bent portion 13z directed to is formed.

  The second race ring 2z has a disk shape having a flat portion that becomes the second race 21z. A step portion 22z is formed in the circumferential direction on the opposite side of the outer periphery of the second track 21z.

  When the first raceway ring 1z and the second raceway ring 2z are combined into a thrust needle roller bearing Hz, the bent portion 13z of the first raceway ring 1z is caulked to the step 22z of the second raceway ring 2z. , Non-separated.

  The needle roller 3z is interposed between the first raceway ring 1z and the second raceway ring 2z.

  The cage 4z has an annular flat plate portion 43z constituted by an inner peripheral flange portion 41z and an outer peripheral flange portion 42z, and a predetermined number of openings 44z that accommodate the needle rollers 3z in the annular flat plate portion 43z in the circumferential direction. It is provided.

  Between each opening 44z and the opening 44z, there is a pillar 45z that holds and guides the needle rollers 3z.

Pillar portion outer peripheral flange portion and the inner peripheral flange portion of the 45z is above the center line Y ₀ -Y ₀ rolling the needle rollers 3z over a predetermined range (Fig. 4A, B, C see) deviate the needle Upper guide portions 441z and 442z for guiding the roller 3z.

Central portion in the radial direction of the pillar portion 45z is to center line _Y 0 -Y ₀ rolling the needle rollers 3z, the outer peripheral flange portion side and the inner peripheral flange portion of the upper guide portion 441Z, as opposed to 442Z, lower The lower guide portion 443z guides at a position biased to the side (see FIGS. 4A, B, and C).

Pillar portion 45z, the guide portion relative to the center line Y ₀ -Y ₀ rolling the needle rollers 3z housed in the opening 44z is formed in the cross-section of substantially M-shaped with biased as described above, needle roller 3z guidance.

Before finally assembling the thrust needle roller bearing Hz, an assembly H ₀ z of the cage 4z and the needle roller 3z is formed (see FIG. 4B). In this case, the needle roller 3z is held as described above by the column portion 45z of the cage 4z, and the assembly H ₀ z is not separated, so that the handling is easy.

Thrust needle roller bearing Hz combines the assembly H ₀ and the first bearing ring 1z second bearing ring 2z, then, by crimping the bent portion 13z of the first bearing ring 1z as previously described It is not separated.

The inner peripheral flange portion 41z (see FIGS. 4A, B, and D) is formed by the upper side surface 411z and the lower side surface 412z on the annular flat plate portion 43z side, and is formed with the same width Wz in the circumferential direction. Although the thrust needle roller bearing Hz is supplied to the rotation center _X 0 -X ₀ Gawaya viewing directions from the lubricating oil Rz of needle roller and the first track 11z and the second track 21z, the lower surface of the inner peripheral flange 41 z 412Z There is a possibility that the clearance Cz between the second track 21z and the second track 21z becomes narrow, and the amount of the lubricating oil Rz passing therethrough is not sufficient. Regarding the assembly of the thrust needle roller bearing, for example, there is the following proposal (see Patent Document 1).
JP 07-332357 A

  However, Patent Document 1 is merely a device for preventing the final assembly of the needle roller bearing from being separated.

  The present invention has been made in view of the above points, and is intended to reduce weight and improve the passage of lubricating oil while reliably preventing separation in the state of an assembly of a cage and a needle roller. An object of the present invention is to provide an assembly of a cage and a needle roller and a thrust needle roller bearing that maintain strength.

In order to achieve the above object, the present invention provides:
Needle rollers,
A cage having an annular flat plate portion in which a plurality of openings for accommodating the needle rollers are formed in the circumferential direction;
The annular flat plate portion has a width extending on the same side in the axial direction of the annular flat plate portion, an inner peripheral flange portion is formed on the inner periphery, and an outer peripheral flange portion is formed on the outer periphery. In an assembly of a cage and needle rollers in which pillar portions between the openings are alternately formed in the radial direction from the radial center of the cage, and the needle rollers are accommodated in the openings. ,
At least one flange portion of the outer peripheral flange portion and the inner peripheral flange portion has a width direction thickness dimension of a facing portion facing the opening portion larger than a width direction thickness size of a facing portion facing the column portion , A cage and needle roller assembly is provided in which the shape of the portion facing the opening is a round shape whose width direction thickness dimension decreases toward the portion facing the column portion. .

The present invention also provides:
Needle rollers,
A cage having an annular portion in which a plurality of openings for accommodating the needle rollers are formed in the circumferential direction;
The annular portion is formed with a first flange portion and a second flange portion extending at both ends at the same radial direction side of the annular portion, and a plurality of the openings and the openings. In the assembly of the cage and the needle roller, in which the column part between the parts is formed in the annular part alternately in the axial direction, and the needle roller is accommodated in the opening,
At least one of the first flange portion and the second flange portion has a width direction thickness dimension of a portion facing the opening portion larger than a width direction thickness dimension of a portion facing the column portion. And an assembly of a cage and a needle roller , wherein the shape of the portion facing the opening is a round shape whose thickness in the width direction decreases toward the portion facing the column. .

The present invention also provides:
A disk-shaped first race ring;
A disc-shaped second raceway facing the first raceway;
Between the first raceway and the second raceway, at least one of the outer peripheral flange portion and the inner peripheral flange portion has a thickness dimension in the width direction of the portion facing the opening. A thrust needle roller in which an assembly of a needle roller and a cage, which is larger than the thickness dimension in the width direction of the opposed portion, is interposed, and the first race ring and the second race ring are coupled to each other in a non-separable manner. A bearing is desirable.

  According to the present invention, a cage that can reduce weight and improve the passage of lubricating oil, and also maintains strength while reliably preventing separation in the state of an assembly of a cage and needle rollers. An assembly with a needle roller and a thrust needle roller bearing can be provided.

  Embodiments of a thrust needle roller bearing according to the present invention will be described below with reference to the drawings.

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS. 1A, 1B, 1C, and 1D.

FIG. 1A is a cross-sectional view of the right half of the rotation center line X ₁ -X ₁ of an assembly of a cage and needle rollers.

Figure 1B is a partial front view of the retainer taken along line U ₁ in Figure 1A.

Figure 1C is a main portion of the inner peripheral flange portion of the cage taken along line V ₁ of the Figure 1A.

FIG. 1D is a right half cross-sectional view of the rotation center line X ₁ -X ₁ of the thrust needle roller bearing.

The cage and needle roller assembly H _{0 according to the} present embodiment includes a cage 4 and needle rollers 3.

  The cage 4 has an annular flat plate portion 43 constituted by an inner peripheral flange portion 41 and an outer peripheral flange portion 42, and a predetermined number of openings 44 for accommodating the needle rollers 3 are provided in the annular flat plate portion 43 in the circumferential direction. It is. Between the adjacent opening 44 and the opening 44 is a pillar 45 for holding and guiding the needle roller 3 (see FIG. 1B).

The opening 44 and the column 45 are formed from the rotation center X ₁ -X ₁ toward the radiation direction.

The outer peripheral flange portion 42 side and the inner peripheral flange portion 41 side of the column portion 45 are biased to the upper side of the rolling center line Y ₁ -Y _{1 of the} needle roller 3 over a predetermined range to guide the needle roller 3. Guide portions 441 and 442 are formed (see FIGS. 1A and 1B).

The central part in the radial direction of the column part 45 is different from the rolling center line Y ₁ -Y ₁ of the needle roller 3 with the upper guide part 441 side of the outer peripheral flange part 42 and the upper guide part 442 side of the inner peripheral flange part 41. On the other hand, the lower guide portion 443 guides at a position biased downward (see FIGS. 1A and 1B).

The column portion 45 is formed in a substantially M-shaped cross section in which the guide portion is deviated as described above with respect to the rolling center line Y ₁ -Y _{1 of} the needle roller 3 accommodated in the opening 44. Guide 3

Before finally assembling a thrust needle roller bearing H to be described later, an assembly H ₀ of the cage 4 and the needle roller 3 is formed (see FIG. 1A). In this case, the needle rollers 3 are held so as to be guided as described above by the upper guide portions 441 and 442 and the lower guide portion 443 of the pillar portion 45 of the retainer 4, and the assembly H ₀ is separated. It is easy to handle.

The inner peripheral flange portion 41 (see FIG. 1C) is formed by a flange upper side surface 411 and flange lower side surfaces 412 and 413 on the annular flat plate portion 43 side. When viewed from the rotation center X ₁ -X ₁ side (see the arrow V _{1 in} FIG. 1A), the inner peripheral flange portion 41 has a thickness dimension in the flange width direction between the flange upper side surface 411 and the flange lower side surface 412. It has a round shape that is W ₁ , forms a facing portion with respect to the opening 44, and is positioned to face the end surface 31 of the needle roller 3. Between the flange on the side 411 and the flange lower surface 413 has become a thickness W ₂ in the width direction of the flange, and has a position for forming the opposing portions of the pillar portion 45.

The above thickness dimensions W ₁ and W ₂ have a large W ₁ , and the flange lower side surface 413 is a concave portion 414 with respect to the flange lower side surface 412.

A thrust needle roller bearing H, which will be described later, rotates about the rotation center X ₁ -X ₁ , and in that case, the lubricating oil flows from the rotation center X ₁ -X ₁ side toward the R direction as viewed from the needle roller 3. Although it is supplied to the first track 11 and the second track 21, the clearance C between the flange lower surface 413 of the inner peripheral flange portion 41 and the second track 21 is wide because the recess 414 is formed, and lubrication is performed. It is easy and sufficient for the oil to pass from the R direction.

When the assembly H ₀ of the needle roller 3 and the cage 4 is used, the opening 44 is a needle in order to limit the amount of movement of the needle roller 3 in the radial direction and prevent the needle roller 3 from falling off the opening 44. The end portions 444 and 445 are formed in a dimension longer than the length of the roller 3 by a predetermined dimension (see FIG. 1B). Further, in order to ensure the prevention of falling off, a wide thickness dimension W _{1 is used.} It is necessary to form the inner peripheral flange portion.

On the other hand, since the inner peripheral flange portion of the thickness dimension W ₂ which is opposed to the bar portion 45 function to prevent falling off from the needle roller 3 of the opening 44 you do not require the recess 414 by reducing the thickness Can be provided.

When the first race ring, the second race ring, and the assembly H ₀ are assembled into the thrust needle roller bearing H, the recess 414 has the lubricating oil from the rotation center X ₁ -X ₁ side. 3 is effective in facilitating the flow in the R direction (see FIG. 1D). Moreover, since the inner peripheral part 14 of the 1st track ring 1, the inner peripheral surface 24 of the 2nd track ring 2, and the inner peripheral flange part 41 of the holder | retainer 4 are in the relationship of the substantially same position in radial direction, Furthermore, the flow of lubricating oil is facilitated.

  Simultaneously with the improvement of the flow of the lubricating oil, the weight of the cage corresponding to the recess 414 can be reduced.

The inner peripheral flange portion 41 and the outer peripheral flange portion 42 basically have a function of maintaining the strength of the cage 4, but in the case of use conditions where it is necessary to reinforce the decrease in strength due to the provision of the recess 414. It is preferable to use a high-tensile steel plate (tensile strength, 340 N / mm ² ).
In this embodiment, a concave portion 414 is provided in the inner peripheral flange portion 41 of the cage 4 so that the amount of lubricating oil can be sufficiently passed, and the weight is reduced, and a high-tensile steel plate is used as necessary. By doing so, the strength can be maintained.

  The outer peripheral flange portion 42 can also be implemented in the same shape as the inner peripheral flange portion 41. In that case, the weight can be further reduced.

  As will be described later, when the needle roller 3 is assembled to a thrust needle roller bearing H, the needle roller 3 is sandwiched and interposed between the first race ring 1 and the second race ring 2.

  Relief portions 311 are formed on the end surface portions 31 at both ends of the needle roller 3, respectively. The escape portion 311 is effective in reducing the weight of the needle roller 3, and also becomes a pool of lubricating oil when the thrust needle roller bearing is stationary.

When the thrust needle roller bearing H is used, a cage and needle roller assembly H ₀ is placed between the first race ring 1 and the second race ring 2 and between the first race ring 1 and the second race ring 2. It is configured by intervening.

  The first bearing ring 1 is formed into a disk shape by pressing from a thin steel plate. Further, the first race 1 is formed with a cylindrical portion 12 that is bent at a right angle to the plane portion on the plane portion that becomes the first track 11 and the outer periphery of the plane portion, and at the end of the cylinder portion 12, A bent portion 13 is formed at a right angle to the cylindrical portion 12 and directed radially inward. Further, the inner peripheral side is constituted by an inner peripheral portion 14.

  The second raceway ring 2 has a disk shape having a flat portion that becomes the second raceway 21, and the second raceway faces the first raceway. A step portion 22 is formed in the circumferential direction on the anti-orbit side of the outer periphery of the second track 21. Further, the inner peripheral side is constituted by an inner peripheral surface 24.

When the first needle ring 1, the second ring 2, the cage and the needle roller assembly H ₀ are combined into the thrust needle roller bearing H, the second ring 22 has a step 22. By crimping the bent portion 13 of the single race 1 and loosely fitting it, they are in a non-separated state.

In the description of the present embodiment, the cage H needle assembly H ₀ is a thrust needle roller bearing H in combination with the first race ring 1 and the second race ring 2. The present invention is not limited to the wheel, and can be carried out by being directly combined with a counterpart component (for example, a component such as a compressor swash plate).

  Next, a modification of the present embodiment will be described with reference to FIG.

FIG. 2 corresponds to FIG. 1D.
This modification is different from the embodiment 1, when the thrust needle roller bearing H the assembly H ₀ between the cage 4 and needle rollers 3 in combination first bearing ring 1 and the second bearing ring 2 , The rotational center line Y ₁ -Y _{1 of} the needle roller 3 is different in that the positional relationship with respect to the top and bottom of each part of the cage 4 is reversed. In the first embodiment, the cage has a substantially inverted M shape compared to the cage having a substantially M shape.

Since the description of each modification example with reference to FIG. 2 is a duplicate description with the description in the first embodiment, in order to avoid this, the parts using the same reference numerals in the first embodiment When expressed as “upper” or “lower” with respect to the rotation center line Y ₁ -Y _{1 of the} needle roller, in this modification, “lower” or “upper” and the holding in the description of the first embodiment. With respect to the relationship between the vessel and the second bearing ring, in this modified example, the second bearing ring is replaced with the first bearing ring, and the description of the first embodiment is replaced with the description of the modified example.

  In addition, although Embodiment 1 and the modification demonstrated the thrust needle roller bearing, it can implement also as a general thrust cylindrical roller bearing.

  Next, Embodiment 2 will be described with reference to FIG.

(Embodiment 2)
FIG. 3A is a cross-sectional view of the upper half of the rotation center line X ₂ -X ₂ of the assembly of the cage and the needle rollers.

Figure 3B is a main portion of the first flange portion of the cage taken along line V ₂ in Figure 3A.

  In this embodiment, an assembly of a cage and needle rollers is applied to a radial needle roller bearing.

Assembly Ha ₀ of cage and needle rollers of this embodiment from the holding devices 4a and needle rollers 3a.

Retainer 4a is closed around the center line _{X 2} -X ₂ as a rotation center, a first flange portion 41a and the second flange portion 42a on both end portions of the annular portion 43a and the annular portion 43a of the cylindrical surface is doing. A predetermined number of openings 44a for accommodating the needle rollers 3a are provided in the annular portion 43a in the circumferential direction facing the axial direction. Between the adjacent opening 44a and the opening 44a is a pillar 45a that holds and guides the needle rollers 3a.

Because related description of the rolling center Y ₂ -Y ₂ or the like of the opening portion 44a and the bar portion 45a and the needle rollers 3a can refer to the description of the first embodiment will be omitted here.

The first flange portion 41a (see FIGS. 3A and 3B) is formed by a flange upper side surface 411a and flange lower side surfaces 412a and 413a on the annular portion 43a side. When viewed from the rotation center X ₂ -X ₂ side (see FIG. 3A, arrow V ₂ , FIG. 3B), the first flange portion 41 a is between the flange upper side surface 411 a and the flange lower side surface 412 a in the flange width direction. is the thickness dimension W ₁ of the facing portion formed with respect to the opening 44a has a substantially round and has become a position facing the end surface of the needle roller 3a. Between the flange on the side 411a and the flange lower surface 413a has become a thickness W ₂ in the width direction of the flange, and has a position for forming the opposing portions of the pillar portion 45a. For the description of this portion, the description of Embodiment 1 can be referred to.

Thickness _{W 1} and _{W 2} of the above large _{W 1,} the flange under side 413a has a recess 414a to the flange lower surface 412a. The cage and needle roller assembly Ha ₀ is assembled with an outer member G (for example, a transmission gear) and an inner member S (for example, a rotation shaft of the transmission), and during rotation, the rotation center X ₂ -X Lubricating oil is supplied from the _second side to the radial needle roller bearing Ha in the direction of arrow R, but the clearance Ca between the flange lower surface 413a of the first flange portion 41a and the inner member S is widened by the recess 414a. Therefore, the lubricating oil can be easily and sufficiently passed from the R direction.

  The outer member G and the inner member S correspond to the first and second race rings of the first embodiment.

Embodiment 1 of the present invention is shown, and a right half sectional view of an assembly of a cage and needle rollers is shown. Show a first embodiment of the present invention, it shows a partial front view of the retainer taken along line U ₁ in Figure 1A. It shows a first embodiment of the present invention, showing the main portion of the inner peripheral flange portion of the cage taken along line V ₁ of the Figure 1A. Embodiment 1 of the present invention is shown, and a right half sectional view of a thrust needle roller bearing is shown. The right half sectional view of a thrust needle roller bearing in the modification of Embodiment 1 is shown. Embodiment 2 of the present invention is shown, and an upper half sectional view of an assembly of a cage and needle rollers is shown. It shows the second embodiment of the present invention, showing a first flange portion of the cage taken along line V ₂ in Figure 3A. A conventional thrust needle roller bearing is shown, and a cross-sectional view of the right half is shown. 1 shows a conventional thrust needle roller bearing, and shows an assembly of a cage and needle rollers. Shows a conventional thrust needle roller bearing, it shows a partial front view of the retainer taken along line U ₀ in Figure 4B. It shows a conventional thrust needle roller bearing, showing a state seen from the arrow V ₀ which Figure 4B.

Explanation of symbols

H ₀ , Ha ₀ : Assembly of cage and needle roller H: Thrust needle roller bearing Ha: Radial needle roller bearing 1: First bearing ring 11: First race 12: Cylindrical portion 13: Bending portion 2: Second race ring 21: Second race 22: Step portion 3: Needle roller 31: Hollow portion 4, 4a: Cage 41: Inner peripheral flange portion 41a: First flange portion 411, 411a: Flange upper side surface (lower side surface) )
412, 412a, 413, 413a: Flange lower side (upper side)
414, 414a: concave portion 42: outer peripheral flange portion 42a: second flange portion 43: annular flat plate portion 43a: annular portion 44, 44a: opening portions 441, 442: upper (lower) guide portion 443: lower side (upper side) ) Guide part 45, 45a: pillar part C, Ca: clearance

Claims (3)

Needle rollers,
A cage having an annular flat plate portion in which a plurality of openings for accommodating the needle rollers are formed in the circumferential direction;
The annular flat plate portion has a width extending on the same side in the axial direction of the annular flat plate portion, an inner peripheral flange portion is formed on the inner periphery, and an outer peripheral flange portion is formed on the outer periphery. In an assembly of a cage and needle rollers in which pillar portions between the openings are alternately formed in the radial direction from the radial center of the cage, and the needle rollers are accommodated in the openings. ,
At least one flange portion of the outer peripheral flange portion and the inner peripheral flange portion has a width direction thickness dimension of a facing portion facing the opening portion larger than a width direction thickness size of a facing portion facing the column portion , An assembly of a cage and a needle roller , wherein the shape of the portion facing the opening portion is a round shape whose width direction thickness dimension decreases toward the portion facing the column portion . Needle rollers,
A cage having an annular portion in which a plurality of openings for accommodating the needle rollers are formed in the circumferential direction;
The annular portion is formed with a first flange portion and a second flange portion extending at both ends at the same radial direction side of the annular portion, and a plurality of the openings and the openings. In the assembly of the cage and the needle roller, in which the column part between the parts is formed in the annular part alternately in the axial direction, and the needle roller is accommodated in the opening,
At least one of the first flange portion and the second flange portion has a width direction thickness dimension of a portion facing the opening portion larger than a width direction thickness dimension of a portion facing the column portion. The assembly of the cage and the needle roller is characterized in that the shape of the facing portion with respect to the opening portion is a round shape whose thickness in the width direction decreases toward the facing portion of the column portion . A disk-shaped first race ring;
A disc-shaped second raceway facing the first raceway;
An assembly of a cage and needle rollers according to claim 1 is interposed between the first track ring and the second track ring, and the first track ring and the second track ring are mutually connected. Thrust needle roller bearing combined non-separately.

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