KR20170093031A - Cage and tapered roller bearing using the same - Google Patents

Cage and tapered roller bearing using the same Download PDF

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Publication number
KR20170093031A
KR20170093031A KR1020160014473A KR20160014473A KR20170093031A KR 20170093031 A KR20170093031 A KR 20170093031A KR 1020160014473 A KR1020160014473 A KR 1020160014473A KR 20160014473 A KR20160014473 A KR 20160014473A KR 20170093031 A KR20170093031 A KR 20170093031A
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KR
South Korea
Prior art keywords
diameter portion
cage
inner ring
small diameter
tapered roller
Prior art date
Application number
KR1020160014473A
Other languages
Korean (ko)
Inventor
이운주
배송식
염민철
Original Assignee
주식회사 베어링아트
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 베어링아트 filed Critical 주식회사 베어링아트
Priority to KR1020160014473A priority Critical patent/KR20170093031A/en
Publication of KR20170093031A publication Critical patent/KR20170093031A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/006—Producing casings, e.g. accumulator cases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
    • F16C33/366—Tapered rollers, i.e. rollers generally shaped as truncated cones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting

Abstract

A cage is disclosed. An annular large-diameter portion having a larger diameter than the small-diameter portion and spaced apart from the small-diameter portion by a predetermined distance in the axial direction; And a plurality of partition walls spaced apart from each other in a circumferential direction so as to connect the small diameter portion and the large diameter portion and accommodating the tapered roller together with the small diameter portion and the large diameter portion, The fixing grooves are formed in the radially inner side and can be prevented from being damaged in the tapered roller bearing provided with the cage.

Description

[0001] CAGE AND TAPERED ROLLER BEARING USING THE SAME [0002]

The present invention relates to a cage, and more particularly, to a plastic cage and a tapered roller bearing using the same.

In general, a bearing is a mechanical element mounted between a rotating element and a non-rotating element to facilitate rotation of the rotating element while supporting the axis of the rotating element.

These bearings are divided into sliding bearings and rolling bearings depending on the state of contact with the shaft, and can be classified into a radial bearing and a thrust bearing according to the direction in which the load is applied.

The rolling bearing is capable of supporting a rotating shaft by a rolling body such as a ball or a roller. Rolling bearings having such a structure are advantageous in that the frictional resistance is smaller than that of a sliding bearing that directly contacts a part of the shaft. As a result, rolling bearings are currently used in various forms such as ball bearings, tapered roller bearings, and needle bearings depending on the shape of rolling elements.

The tapered roller bearing has a generally tapered cylindrical shape and is used for the purpose of simultaneously supporting the loads in the rotational axis direction and the radial direction. For example, a shaft of a power transmission device such as an axle in a vehicle may be supported, or an automatic transmission may be used.

5, the conventional tapered roller bearing includes an inner ring 100, an outer ring 110, a tapered roller 120 interposed between the inner ring 100 and the outer ring 110 as a rolling member, And a cage 130 or a retainer for receiving and rotatably supporting the taper roller 120.

The cage 130 is formed in a ring shape continuous in a circumferential direction, and a plurality of pockets are formed in which a plurality of partition walls are spaced apart from each other in a circumferential direction at predetermined intervals, and a taper roller 120 is received and supported between the partition walls. Respectively.

The cage 130 is usually made of a steel material and is used for rotatably supporting a mission of a vehicle or a gear of an axle. In recent years, however, a cage made of a plastic material has been used to improve fuel economy with low torque and low friction Is being developed.

The cage 130 accommodating the taper roller 120 is mounted on the inner ring 100 and moves in the axial direction by a large diameter step 101 and a small diameter step 102 formed radially outward from both ends of the inner ring 100, Is limited.

6 is an assembled view showing a state in which the cage 130 accommodating the upper taper roller 120 is mounted on the inner ring 100. As shown in FIG. 6, when the taper roller 120 is mounted on the inner ring 100, the inner circumferential surface of the taper roller 120 and the small diameter step 102 of the inner ring 100 are brought into contact with each other. That is, the cage 130 accommodating the taper roller 120 is assembled in an assembling direction (indicated by an arrow). At this time, the taper roller 120 is interfered by the outer peripheral surface of the inner ring 100. Thus, the surface of the taper roller 120 may be damaged or the cage 130 may be deformed. Particularly, since the plastic cage 130 can be damaged by the impact generated when the taper roller 120 is assembled to the cage 130, a structural shape of the cage capable of reducing such impact is required .

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a cage which is free from the risk of occurrence of scratches or scratches on the surface of the taper roller during the assembling process, Roller bearings.

According to an embodiment of the present invention, there is provided a cage comprising an annular small-diameter portion, an annular large-diameter portion having a larger diameter than the small-diameter portion and spaced apart from the small- And a plurality of partition walls spaced apart from each other in a circumferential direction to connect the small diameter portion and the large diameter portion, the plurality of partition walls receiving the tapered roller together with the small diameter portion and the large diameter portion, Shaped fixing grooves are formed on the outer circumferential surface.

The partition wall having a first partition wall extending from the small-diameter portion to the large-diameter portion; And a second partition wall extending from the large diameter portion toward the small diameter portion, wherein the first partition wall extends inside the radius of the second partition to stably support the taper roller.

And a lubricant oil retaining groove extending in the longitudinal direction of the partition wall is formed on a radially outer side surface of the first partition wall.

The plurality of partition walls are spaced apart from each other by a predetermined distance in the circumferential direction, and the tapered roller pockets are formed by the two partition walls adjacent to each other, the large diameter portion, and the small diameter portion.

A tapered roller bearing according to an embodiment of the present invention comprises a cage according to any one of claims 1 to 3; A plurality of tapered rollers inserted into the cage and rotatably supported; An outer ring disposed radially outward about the cage; And an inner ring disposed radially inward about the cage.

Wherein the inner ring and the outer ring form an inner ring raceway surface and an outer ring raceway surface, respectively, which are opposite to each other; A planar surface extending in the axial direction is formed at one end of the inner ring raceway surface on the radially outer circumferential surface of the inner ring and a large diameter step protruding radially outward is formed on the other end of the inner ring raceway surface .

A fixing protrusion is protruded radially inward from one end of the outer ring raceway surface, and the fixing protrusion is inserted into a fixing groove formed in the cage to restrict movement of the cage.

The cage may be formed of a plastic material by a die process.

According to the cage and the tapered roller bearing using the cage according to the embodiment of the present invention, the small-diameter step of the inner ring is removed and the fixing groove is formed at one side of the cage so as to be fixed to the outer ring, So that scratches and scratches are prevented from being generated. Further, the tapered roller can be stably assembled to the cage, and the performance of the tapered roller bearing can be improved.

1 is a perspective view of a tapered roller bearing according to an embodiment of the present invention.
2 is a cross-sectional view of the AA portion of Fig.
3 is a perspective view of a cage in accordance with an embodiment of the present invention.
4 is an assembled cross-sectional view of a tapered roller bearing according to an embodiment of the present invention.
5 is a cross-sectional view of a tapered roller bearing according to the prior art.
6 is an assembled cross-sectional view of a tapered roller bearing according to the prior art.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Throughout the specification, when a section includes a constituent element, it is understood that it can include other constituents, not excluding the other constituent elements unless specifically stated otherwise.

For convenience of explanation, the left side of the drawing in the axial direction is referred to as' one side ',' one end ',' one end 'and the like name, and the right side of the drawing in the axial direction is referred to as' other side, End " and similar names.

The parts denoted by the same reference numerals throughout the specification mean the same or similar components.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a tapered roller bearing according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of AA portion of FIG. 1, FIG. 3 is a perspective view of a cage according to an embodiment of the present invention, Sectional view of a tapered roller bearing according to an embodiment.

The tapered roller bearing 1 according to the embodiment of the present invention includes an outer ring 10 whose radially inner side portion is axially opened and both side surfaces are in communication with each other, The relative rotation of the inner ring 20 or the outer ring 10 with respect to the outer ring 10 or the inner ring 20 interposed between the outer ring 10 and the inner ring 20 And a cage 40 or a retainer for rotatably supporting the taper roller 30, as shown in Fig.

On the inner circumferential surface of the outer ring 10, there are formed an outer ring raceway surface 12 inclined with respect to the axial direction and a fixed projection surface 11 which is bent from one end of the outer ring raceway surface 12 and extends radially outwardly and one side in the axial direction . A fixing protrusion 13 is formed at a portion bent from the outer ring raceway surface 12 to the fixed projection surface 11.

On the other hand, an inner ring raceway surface 22 inclined with respect to the axial direction is formed on the outer peripheral surface of the inner ring 20 facing the outer ring raceway surface 12, and the outer ring raceway surface 12 and the inner ring raceway surface 22 are arranged in the circumferential direction . On the outer circumferential surface of the inner ring 20 facing the fixed projection surface 11, a flat surface 24 extending in the axial direction is formed. According to the conventional technique, a small-diameter step protruded outward in the radial direction is formed on one side of the outer peripheral surface of the inner ring 20. However, according to the embodiment of the present invention, the small-diameter step is removed and the flat surface 24 extending in the axial direction at the radial height of one end of the inner ring raceway surface 22 is formed.

A large-diameter step 26 protruding radially outward is formed at the other end of the inner ring raceway surface 22, and the outer diameter of the large-diameter step 26 extends radially outward beyond the upper flat surface 24.

A plurality of taper rollers 30 can be inserted and rotatably supported between the outer ring raceway surface 12 and the inner ring raceway surface 22 and a plurality of tapered rollers 30 can be supported at predetermined intervals The cage 40 can be used to maintain the spaced apart state.

2 to 3, the cage 40 includes a small-diameter portion 42 formed in a circular ring shape and a small-diameter portion 42 which is spaced from the small-diameter portion 42 in the axial direction and whose diameter is relatively larger than that of the small- A large large diameter portion 44 and a plurality of partition walls 46 axially connecting the small diameter portion 42 and the large diameter portion 44 and spaced apart in the circumferential direction at predetermined intervals. In addition, a tapered roller pocket 50 is formed in the circumferential direction between the adjacent plurality of partition walls 46.

The cage 40 can be molded by injection molding using a plastic material. Therefore, the caulking process required in the process of manufacturing a conventional steel retainer can be omitted, and productivity and mass productivity can be improved.

The partition wall 46 has a first partition wall 47 extending toward the other axial end in the small diameter portion 42 and a second partition wall 47 extending outward from the large diameter portion 44 toward the small diameter portion 42 As shown in FIG. The other side of the first bank 47 is disposed radially inward of the second bank 48 and extends radially inward of the second bank 48. Accordingly, the first partition 47 and the second partition 48 are formed stepwise, and the taper roller 30, which is seated inside the first partition 47 and the second partition 48, is stably supported in the radial direction.

Further, a lubricant oil retaining groove S is formed on a radially outer side surface of the first partition wall 47. A certain amount of lubricating oil can be filled in the lubricating oil retaining groove S and the above lubricating oil can be smoothly supplied to the tapered rollers 17 coupled to both sides thereof. The radially inner side portion 49 of the first bank 47 is narrower than the outside of the radius of the first bank 47 so that the partition 46 can be lightened.

Referring to FIG. 2, the outer circumferential surface of the small-diameter portion 42 according to the embodiment of the present invention is formed with a fixing groove 90 which is fined radially inward. A first support portion 95 and a second support portion 97 protruding radially outward are formed at one end and the other end of the outer circumferential surface of the small diameter portion 42. The first support portion 95 and the second support portion 97 are formed between the first support portion 95 and the second support portion 97 The fixing groove 90 is radially inwardly grasped.

A part of the inner circumferential surface of the outer ring 10 is accommodated in the fixing groove 90 so that the cage 40 is separated from the outer ring 10 and is restricted from moving in the axial direction. As described above, the fixing protrusion 13 is protruded radially inward from one side of the inner peripheral surface of the outer ring 10, and the fixing protrusion 13 is inserted into the upper fixing groove 90, It can prevent movement.

The taper roller 30 and the cage 40 can be interposed so as to be fixed between the outer ring 10 and the inner ring 20 without forming a small-diameter step as in the prior art.

4 is an assembled cross-sectional view of a tapered roller bearing 1 according to an embodiment of the present invention.

Referring to FIG. 4, in order to assemble the tapered roller bearing 1, a cage 40 containing a taper roller 30 is coupled to the inner peripheral surface of the outer ring 10. The fixing protrusion 13 formed on the inner peripheral surface of the outer ring 10 is inserted into the fixing groove 90 formed in the small diameter portion 42 of the cage 40 to limit axial movement of the cage 40. [

The assembly of the outer ring 10 and the cage 40 is assembled axially (indicated by an arrow) on the outer peripheral surface of the inner ring 20. One end of the taper roller 30 meets the large diameter step 26 of the inner ring 20 and the inner circumferential surface of the small diameter portion 42 of the cage 40 is seated on the flat surface 24,

According to the embodiment of the present invention, since the small-diameter step is not formed in the inner ring 20, the tapered roller 30 is seated on the inner ring raceway surface without interference of other obstacle elements. Accordingly, the tapered roller bearing 1 is free from the risk of occurrence of scratches or scratches on the surface of the tapered roller during its assembly process, and there is no fear of plastic deformation or breakage.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Various modifications and variations are possible within the scope of the appended claims.

10: Outer ring
11: Fixing projection surface
12: outer ring raceway surface
13: Fixing projection
20: Inner ring
22: Inner ring raceway surface
24: Flat surface
26: Large diameter step
30: Taper roller
40: Cage
42: Small neck
44: Large neck
46:
47: first partition
48: second partition
50: Tapered roller pocket
90: Fixing groove
95: first support portion
97: second support portion

Claims (8)

An annular small neck;
An annular large diameter portion spaced apart from the small diameter portion by a predetermined distance in the axial direction and having a larger diameter than the small diameter portion; And
A plurality of partition walls spaced apart in a circumferential direction so as to connect the small diameter portion and the large diameter portion and accommodating the tapered roller together with the small diameter portion and the large diameter portion;
≪ / RTI >
And a fixing groove shaped like a pin is formed radially inwardly on the outer circumferential surface of the small diameter portion.
The method according to claim 1,
The partition wall
A first partition wall extending from the small diameter portion in the large diameter portion direction; And
A second partition wall extending from the large diameter portion in the direction of the small diameter portion;
/ RTI >
And the first partition wall extends inside the radius of the second partition to stably support the taper roller.
3. The method of claim 2,
And a lubricant oil retaining groove extending in the longitudinal direction of the partition wall is formed on a radially outer side surface of the first partition wall.
3. The method of claim 2,
Wherein the plurality of partition walls are spaced apart from each other by a predetermined distance in the circumferential direction, and a tapered roller pocket is formed by two partition walls adjacent to each other, the large diameter portion and the small diameter portion.
A cage according to any one of claims 1 to 4;
A plurality of tapered rollers inserted into the cage and rotatably supported;
An outer ring disposed radially outward about the cage; And
An inner ring disposed radially inward about the cage;
And a tapered roller bearing.
6. The method of claim 5,
Wherein the inner ring and the outer ring form an inner ring raceway surface and an outer ring raceway surface, respectively, which are opposite to each other;
Characterized in that a flat surface extending in the axial direction is formed at one end of the inner ring raceway surface on the outer circumferential surface of the inner ring in the radial direction and a large diameter step protruded outward in the radial direction is formed on the other end of the inner ring raceway surface. bearing.
The method according to claim 6,
Wherein a fixing protrusion is protruded radially inward from one end of the outer ring raceway surface, and the fixing protrusion is inserted into a fixing groove formed in the cage to restrict movement of the cage.
8. The method of claim 7,
Wherein the cage is formed of a plastic material by a die process.
KR1020160014473A 2016-02-04 2016-02-04 Cage and tapered roller bearing using the same KR20170093031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160014473A KR20170093031A (en) 2016-02-04 2016-02-04 Cage and tapered roller bearing using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160014473A KR20170093031A (en) 2016-02-04 2016-02-04 Cage and tapered roller bearing using the same

Publications (1)

Publication Number Publication Date
KR20170093031A true KR20170093031A (en) 2017-08-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160014473A KR20170093031A (en) 2016-02-04 2016-02-04 Cage and tapered roller bearing using the same

Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190048357A (en) * 2017-10-31 2019-05-09 셰플러코리아(유) A Tapered Roller Bearing Having Improved Assembling
KR20200034393A (en) * 2018-09-21 2020-03-31 주식회사 만도 Electric Power Steering Apparatus for Vehicle
KR102553662B1 (en) 2022-06-30 2023-07-12 조범종 Bearing housing with bearing outer ring and auxiliary footrest system for vehicle including the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190048357A (en) * 2017-10-31 2019-05-09 셰플러코리아(유) A Tapered Roller Bearing Having Improved Assembling
KR20200034393A (en) * 2018-09-21 2020-03-31 주식회사 만도 Electric Power Steering Apparatus for Vehicle
KR102553662B1 (en) 2022-06-30 2023-07-12 조범종 Bearing housing with bearing outer ring and auxiliary footrest system for vehicle including the same

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