KR20010071275A - Rolling bearing - Google Patents

Abstract

The present invention relates to an inner ring 10, an outer ring 30, and a set of rollers 12 operating between the inner ring 10 and the outer ring 30, and a cage for holding the rollers 12 in space. 100) with roller bearings. Cage 100 has two cage rings 101 and 102 between web 104 extensions and is provided with protrusions for mounting rollers 12 to the web. The inner ring 10 has ring flanges 10b and 10c to which the end side 12b of the roller 12 is guided. The web 104 is tapered to the bearing shaft 40a. The protrusion is formed by a wedge shaped side piece 104b located at the end of the web (FIG. 1).

Description

Roller bearing {Rolling bearing}

This type of roller bearing or cage for roller bearings is DT-C3-14 00 324, DE-A1-31 34 241, DE-C2-34 24 741, DE-A1- 44 42 269, DE-A1- 196 19 712, DE-A1-196 54 584, EP-B1-O 225 508 and EP-A1-O 392 146.

In the case of known rollers or roller bearings, the web of the cage has a significant width in the bearing so that a small number of rollers are accommodated and thus the load capacity of the roller bearings is relatively small.

The present invention relates to a roller bearing according to the preamble of claim 1.

1 is an enlarged perspective view showing a roller bearing,

2 is a radial cross-sectional view of the roller bearing assembled by FIG.

3 is another radial cross-sectional view of the roller bearing assembled by FIG. 1, FIG.

FIG. 3a is a view of the cage bearing roller bearing according to FIG. 3, FIG.

4 is a plan view of the axis of the cage shown in FIG. 1 with a partial cross-section VI of the circumference, FIG.

5 is a cross-sectional view of the cage along the line V-V of FIG.

6 is an enlarged view of a partial section VI of FIG. 4, FIG.

FIG. 7 is an enlarged detailed view of FIG. 8. FIG.

8 is a reduced perspective view of the cage of FIG. 4, FIG.

9 is a radial cross-sectional view of the roller bearing assembled by the second embodiment,

10 is another radial sectional view of the roller bearing assembled by the second embodiment,

FIG. 10a is a view of a caged roller bearing according to FIG. 10, FIG.

11 is a plan view of the cage axis shown in FIG. 9, with a partial cross-section of the circumference;

12 is a cross-sectional view of the cage along the line VII-VII of FIG.

FIG. 13 is an enlarged view of a partial section XIII of FIG. 11;

FIG. 14 is an enlarged detailed view of XIV of FIG. 15;

15 is a reduced perspective view of the cage shown in FIG. 9;

16 is a radial cross-sectional view of the roller bearing assembled by the third embodiment,

17 is another radial sectional view of the roller bearing assembled by the third embodiment,

18 is a plan view of the axis of the cage shown in FIG. 17, with a partial cross-section of the circumference;

FIG. 19 is a cross-sectional view of a cage along a XXXI-XIV line of FIG. 18; FIG.

20 is an enlarged view of a partial section VII of FIG. 18;

FIG. 21 is an enlarged detailed view of XI of FIG. 22;

22 is a reduced perspective view of the cage shown in FIG. 16;

23 is a radial cross-sectional view of the roller bearing assembled by the fourth embodiment;

24 is another radial sectional view of the roller bearing assembled by the fourth embodiment;

25 is a plan view of the axis of the cage shown in FIG. 23, with a partial cross-section circumferential;

FIG. 26 is a cross-sectional view of a cage along a line VI-VI of FIG. 25; FIG.

27 is an enlarged view of a partial section VII of FIG. 25,

FIG. 28 is an enlarged detail of FIG. 29;

29 is a reduced perspective view of the cage shown in FIG. 23;

It is an object of the present invention to manufacture a roller bearing of the type mentioned above which the packing density of the roller is high and easily assembled.

This object is achieved by the features of claim 1.

It is recognized that the invention is realized when the bearing comprises substantially three different parts and a plurality of rollers. The roller is located between the outer ring and the inner ring and separated by the cage. A feature of the cage is that it includes two cage rings of different diameters and webs that are generally wedge shaped and the rollers are located in a minimum space from each other. Generally, recesses or flanges of the ring are provided in the inner ring and / or the outer ring and establish a preferred contour lock space of the cage of the ring. As a result, the cage can be inserted between the two rings in the axial direction but not to the right through the ring.

Therefore, the packing density of the roller can be larger than that of the known roller bearing so that a large force can be transmitted. The assembly of the roller bearings is easily carried out so that the inner ring of the roller bearings sliding on the engine shaft is engaged with the rollers of the ring magazine, and the rollers are kept with grease lubrication. The shaft is then inserted into the outer ring which engages the cage with the inner ring and the roller. The cage can be fixed to the outer ring in other ways and a wedge shaped web can be placed between the rollers. Since the roller has a small contact surface with the wedge shaped side pieces of the cage, the friction between the roller and the cage is minimized.

The raceway on which the roller bearings are guided is placed on the outer ring itself, not on the inner ring, and the cage is deformed in association with and mounted on the inner ring.

Thus, in another embodiment of the present invention, a cage, which acts for the splitting of the cylindrical roller body in common, can be mounted on the outer or inner ring of the bearing and inserted in the axial direction of the bearing.

Another useful and advantageous embodiment of the invention appears in the dependent claims.

Particularly useful embodiments of the present invention provide that the inner and outer rings of the cage ring fit the inner or outer diameter of the ring in view of the outer diameter of the roller. By this means, cage rings of different diameters can generally be inserted between cage rings but are not guided to the right through the roller bearings.

Another useful embodiment of the invention is provided with a ring flange facing towards the axis of the roller. By this means the rollers are guided by one or the other cage ring or both.

In addition, a useful embodiment of the present invention is provided with a web that is substantially the shape of a protrusion having a trapezoidal or triangular cross section. It is useful if the web has wedge shaped side pieces within the scope of the inventive concept. As a result, on the one hand the stability of the cage can be established in which the space between two adjacent rollers can be kept to a minimum.

According to another embodiment of the present invention, the width of the web in the region of the wedge shaped side piece is selected to be the minimum space of the roller that permits lubrication of the bearing. Thus, the packing density of the rollers is suitably arranged internally, resulting in good force transmission of the bearings.

In another embodiment, the space of the roller is preferably only a few tens of millimeters.

In another embodiment of the present invention, the outer ring has a side, ring recess coupled to the cage ring with a large inner diameter in a form-locking manner. This type of roller bearing is particularly suitable as a double bearing in which the faces of two outer rings provided with recesses are in contact with each other. The coupling is also preferably a coupling by force.

The advantage made by the present invention is in particular that the proposed bearing can be used not only in the center arrangement of the shaft and parts but also in the eccentric arrangement. In the case of eccentric arrangements, additional forces arise, in particular, as a result of the stress being applied to the bearing itself and the cage. In known cases, the cage is radially induced in the rollers and consequently is excessively loaded by the rollers in the case of eccentric arrays. On the other hand, as a result that the cage can be used in particular as an eccentric arrangement of the parts, the cage can be derived from the outer ring and / or the inner ring by the present invention. As a result, the cage is not particularly dedicated to the additional force of the roller bearings. The structure of the cage does not need to be particularly strong. At the same time, a particularly useful assembly of the cage is possible.

Finally, it is noteworthy that the cage according to the invention allows a particularly small width of the roller bearing since the cage ring has a narrow cross section. At the same time, the cage ring can be sufficiently high because there is adequate space for radial cross-sectional height. The most important purpose of the cage is to divide the rollers, at the same time the constant arrangement of the rollers established around the circumference of the raceway. The cage is generally made of plastic and can be manufactured by injection molding.

The roller bearing of FIG. 1 comprises an inner ring 10, a set of cylindrical rollers 12, a cage 100 and an outer ring 30 and is mounted rotationally about an axis 40a.

The inner ring 10 is provided at the shaft end with respective ring flanges 10b and 10c that do not limit the raceway 10a for the roller 12. Because of the ring flanges 10b and 10c, the rollers are safe against axial displacement. When the roller 12 is inserted into the inner ring 10, the spacing A of the rollers is approximately 0.1 mm from each other. The roller 12 can be inserted, for example, by lubrication of grease from the ring magazine, not shown, into the inner ring 10. The axial distance of the roller 12 is almost exactly related to the spacing of the ring flange 10b and the ring flange 10c.

Cage 100 has a front cage ring 102, a rear cage ring 101 and a plurality of webs 104, the number of webs being related to the number of rollers 12, the webs being cage rings 101, 102. It extends across and is distributed uniformly around the cage (100). Web 104 is a wedge shaped cross section, in particular a trapezoidal shape as shown in FIGS. 4 and 6. Generally, the web is contoured to taper towards the axis 12c of the roller 12. As most clearly shown in FIG. 7, the web 104 has contoured wedged side pieces 104a and 104b protruding from the ends of the web, respectively, and wedged side pieces 104a and 104b and a central wedge side. Piece 104c is opposed to be offset inward. The wedge side pieces 104a and 104b act to guide the roller 12 and the wedge side pieces 104c are not in contact with the roller 12. The contact surface of the web 104 with the roller 12 is thus very small. The roller 12 is rotatable about an axis 12c and is provided with a cylindrical raceway 12a. The axial end side 12b of the roller 12 is in contact with the surface 101b. The front cage ring 102 has an inner diameter d1 (FIG. 3) that is larger than the inner diameter d2 of the outer ring 30, while the rear cage ring 101 has an inner diameter d2 of the outer ring 30. Has an outer diameter d3 smaller than As a result, on the one hand, the cage 100 can overturn the roller 12 or vice versa when the roller 12 can protrude toward the cage 100 and on the other hand, when the cage 100 is assembled a roller bearing, It may protrude toward the outer ring 30. When the roller bearings are mounted, the rear end side 12b of each roller 12 abuts against the inner surface 101b of the cage ring 101 (FIG. 3).

A ring recess 30 'of diameter d4 is provided by means by which the vertical receiving surface 30'a and the horizontal receiving surface 30'b are formed on the front sidewall of the outer ring 30, The radially inner surface forms an additional raceway 31 for the roller 12 (FIGS. 2 and 3A). The front cage so that the inner surface 102a of the cage ring faces the vertical outer surface 30'a and the edge face 102b of the cage ring 102 faces the horizontal receiving surface 30'b. A ring 102 is attached to the recess 30 '. The outer surface 102c of the cage ring 102 thus forms a longitudinal section, such as the front side of the outer ring 30, or is offset inward with respect to the latter. The arrangement of the cage 100 in the outer ring can be affected in other ways. However, with the reception of the front cage ring 102 in the recess 30 ', the arrangement is rather mounted with a gap in a floating manner.

Also, as shown in FIG. 2, the outer surface 104d of each strut 104 is formed with a rear cage ring (s) such that a large air gap 29a is formed between the raceway 31 of the outer ring 30 and the outer surface of the strut 104d. Offset inward relative to the edge face of 101). These voids establish good passage of lubricating grease. As shown in Figs. 4, 5 and 8, the cage 100 in which the cage rings 101 and 102 are mounted has a numerical value of d1 and d5 or d3 in the radial direction. Large cage ring 102 has two radially disposed faces 102a and 102c and an axially disposed face 102b and the small cage ring 101 is provided with faces 101a, 101c and 101b ( 3). Therefore, it means that d3≤d2≤d1 and d5≤d4.

The space here is chosen such that the cage does not "fall" into the roller in the range of radial clearance, otherwise the result can be radial induction of the cage into the unwanted roller. To some extent, cages are guided to faces 30'b and 31 via radiating surfaces 101a and 102b.

The second embodiment of the present invention is shown in Figs. 9 to 15, where " 1 " is added to the part having the same function as the part according to Figs. Features of the embodiment are that the inner ring 10.1 has only one ring flange 10b.1, the outer ring 30.1 has a ring flange 10b.1 and the cage 100.1 is between two rings for operation. It is arranged to be located.

A feature of the cage 100.1 is that the rear cage ring 100.1 is offset in stages and the faces 101a.1 and 101b.1 cooperate with the flange 30 ".1. The roller 12 is Guided between the ring flanges 10b.1 and 30 " .1. Therefore, it means that d3 ≦ d6 ≦ d1 ≦ d2 ≦ d5 ≦ d4.

A third embodiment of the invention is shown in Figs. 16-22, in which portions which function like those according to Figs. 1-8 are provided with the subscript " 2 ".

The third embodiment of the invention shown in FIGS. 16-22 is provided with two ring flanges 30'.2 and 30 ".2 on the outer ring 30.2, with the inner ring 10.2 on the one hand. It is characterized by not having a flange and on the other hand having a ring recess 10 '. 2. The cage 100.2 is also similarly arranged and the web is tapered outwards at the central axis 40a. The embodiment is the first practice according to FIG. 1 in that the outer ring 30.2 has ring flanges 30'.2, 30 ".2 and the recess 10'.2 is arranged in the inner ring 10.2. It is different from the example. The result is some mechanical reversal of the special action part. Therefore, it means that d4 ≦ d5 ≦ d1 ≦ d2 ≦ d3.

The cage 100.2 is thus arranged as an "outer meshing wheel" and the cage 100 according to FIG. 8 is arranged as an "inner meshing wheel".

A fourth embodiment of the present invention is shown in Figs. 23-29, where the part which acts like the part according to Figs. 1-8 is provided with the subscript "3".

The fourth embodiment of the invention shown in FIGS. 23-29 shows that the outer ring 30.3 has only one flange 30'.3 while the inner ring 10.3 has a ring recess 10'.3. And ring flange 10c.3. Cage 100.3 applies similarly. Therefore, it means that d4 ≦ d5 ≦ d1 ≦ d2 ≦ d6 ≦ d3.

Claims (15)

Inner ring 10, outer ring 30 and a set of rollers 12 operating between inner ring 10 and outer ring 30, and a cage in which two cage rings 101, 102 are provided ( In a roller bearing having 100 and positioned in a web 104 in which a roller maintains space, Inner ring (10, 10.1, 10.2, 10.3) or outer ring (30, 30.1, 30.2, 30.3) or inner ring (10, 10.1, 10.2, 10.3) and outer ring (30, 30.1, 30.2, 30.3) at least Webs 104, 104.1 with ring flanges 10b, 10c, 10b.1, 30 ".1, 30'.2, 30" .2, 30'.3, 10c.3 for one roller 12 , 104.2, 104.3 are radially tapered and inner ring 10, 10.1, 10.2, 10.3 or outer ring 30, 30.1, 30.2, 30.3 or inner ring 10, 10.1, 10.2, 10.3 and outer ring 30, 30.1, 30.2, 30.3 have at least one opening recess 30 ', 30'.1 in the axial direction for one cage ring 101, 102, 101.1, 102.1, 101.2, 102.2, 101.3, 102.3 , 10'.2, 10'.3) roller bearing. The roller bearing according to claim 1, wherein the cage (100) is inserted between the rings (10, 30) in the axial direction and located inside the ring. 3. The outer and inner diameters of the cage rings (101, 102) are adapted to the inner and outer diameters of the rings (10, 30) in consideration of the outer diameter of the roller (12). Roller bearings. 4. A roller bearing according to any one of the preceding claims, characterized in that the ring flange (10b, 10c) faces towards the axis (12c) of the roller (12). The roller bearing according to any of the preceding claims, characterized in that the web (104) is the contour of the protrusion. 6. The roller bearing as claimed in claim 1, wherein the web has a substantially trapezoidal or triangular cross section. 7. 7. The roller bearing according to any one of the preceding claims, characterized in that the web (104) has a wedge shaped side piece (104a, 104b). 8. The width of the webs 104 in the region of the wedge-shaped side segments 104a, 104b is such that the spaces A of the rollers 12 with respect to each other lubricate the bearings. Roller bearing, which takes up space to be minimal. 9. The roller bearing according to any one of claims 1 to 8, wherein the space of the rollers (12) relative to each other is 0.1 to 0.8 mm. 10. The roller bearing according to claim 1, wherein the side recesses (30 ′) which engage one cage ring (102) are loops. 11. 11. A wedge shaped piece (104c) according to any of the preceding claims, characterized in that a wedge shaped piece (104c) is located between the wedge shaped pieces (104a, 104b) and not in contact with the roller (12). Roller bearings. 12. The roller bearing according to any one of the preceding claims, wherein the centrally located wedge shaped side piece (104c) is greater than the sum of the faces of two other wedge shaped side pieces (104a, 104b). 13. Roller bearing according to one of the preceding claims, characterized in that the recess (30 ') has a stepped cross section. 14. A roller bearing according to any one of the preceding claims, wherein the outer surfaces (101c, 102c) of the shaft of the cage rings (101,102) are located inside the outer ring (30). 15. The roller bearing according to any one of the preceding claims, wherein the one cage (100) is made of plastic.