CN210196273U - Expansion-free tapered roller bearing retainer and tapered roller bearing - Google Patents
Expansion-free tapered roller bearing retainer and tapered roller bearing Download PDFInfo
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- CN210196273U CN210196273U CN201920938154.3U CN201920938154U CN210196273U CN 210196273 U CN210196273 U CN 210196273U CN 201920938154 U CN201920938154 U CN 201920938154U CN 210196273 U CN210196273 U CN 210196273U
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- tapered roller
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Abstract
The application discloses exempt from to expand tapered roller bearing holder and tapered roller bearing, wherein, exempt from to expand tapered roller bearing holder and include big end ring, little end ring and connect the fenestration roof beam of big end ring and little end ring, two adjacent fenestration roof beams enclose into the fenestration that is used for placing the roller with big end ring and little end ring, fenestration roof beam has the pressure sloping face with roller contact, the pressure sloping face includes the working contact surface that is close to big end ring and the assembly contact surface that is close to little end ring, and the assembly contact surface is buckled along the corresponding fenestration outside of the circumference orientation of exempting from to expand tapered roller bearing holder for the working contact surface. The expansion-free tapered roller bearing retainer does not need to be subjected to expansion and contraction processes during assembly, a riveting die is not needed in the assembly process, plastic deformation does not occur in the assembly process of the expansion-free tapered roller bearing retainer, the stability and the bearing capacity of the clearance of the tapered roller bearing are improved, the quality of the tapered roller bearing is improved, and the reduction of production cost and the improvement of production efficiency are facilitated.
Description
Technical Field
The application belongs to the technical field of bearings, and particularly relates to an expansion-free tapered roller bearing retainer and a tapered roller bearing.
Background
The rolling body of the tapered roller bearing is a tapered roller, belongs to a separable bearing, generally comprises a separable outer ring and an inner assembly, and can bear radial load and unidirectional axial load. The inner assembly comprises a retainer, an inner ring and a tapered roller positioned between the retainer and the inner ring, the inner ring is provided with an outer raceway formed by a small flange and a large flange, and the tapered roller is locked in the outer raceway by the large flange, the small flange and the retainer of the inner ring to form the inseparable inner assembly.
As shown in figure 1, the small rib mainly plays a role in locking the tapered roller 1 'and the retainer 2' to ensure that the inner assembly is not separated. However, due to the existence of the small flanges, the existing retainer 2 'needs to be subjected to an expansion process before being assembled, so that the retainer 2' is forced to be subjected to plastic deformation to increase the radial movement space of the tapered rollers 1 ', and the expanded retainer 2' and the tapered rollers 1 'can be mounted in the outer raceway of the inner ring 3' together through the small flanges; then, during assembly, the retainer 2 ' needs to be shrunk by using a caulking die 4 ' (a dedicated assembly shrinking die) to restore the retainer 2 ' to a state required by the design before expansion, thereby completing assembly of the inner component. In actual processing, because the expansion process and the contraction process both force the retainer to generate plastic deformation, the retainer is difficult to restore to an ideal original state after contraction. Through measurement verification, the plain line of the retainer pressing slope after shrinkage is obviously changed compared with the original state, the precision of the retainer is seriously influenced, the contact state of the tapered roller and the retainer pressing slope is directly influenced, and the quality indexes such as the play, the swing and the like of the whole bearing are influenced; the integral strength of the retainer can be reduced, and the service life of the bearing can be greatly shortened for a heavy-duty bearing.
The above description is included in the technical recognition scope of the inventors, and does not necessarily constitute the prior art.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the purpose of this application is to provide an exempt from to expand tapered roller bearing holder and tapered roller bearing, the assembly of exempting from to expand tapered roller bearing holder need not through expansion and shrink process, the assembling process need not the riveting mould, also need not to change the structure of other subassemblies of tapered roller bearing, and is convenient simple, exempt from to expand tapered roller bearing holder and do not take place plastic deformation in the assembling process, guarantee to exempt from to expand the data after the tapered roller bearing holder assembles and the data unanimity before the assembly, improve the stability of tapered roller bearing play, promote the whole quality of tapered roller bearing.
In order to achieve the above object, in one aspect, the present application provides an expansion-free tapered roller bearing cage, including a large end ring, a small end ring, and a window beam connecting the large end ring and the small end ring, two adjacent window beams and the large end ring and the small end ring enclosing a window hole for placing a roller, wherein the window beam has a pressure slope surface contacting with the roller, the pressure slope surface includes a working contact surface close to the large end ring and an assembly contact surface close to the small end ring, and the assembly contact surface is bent relative to the working contact surface along the outer side of the window hole corresponding to the circumferential direction of the expansion-free tapered roller bearing cage.
In one example, when the roller is placed in the window hole and is in contact with the working contact surface, the diameter of an enveloping circle of an inner ring of the roller is smaller than the outer diameter of a small rib of the inner ring; when the roller is arranged in the window hole and is in contact with the assembling contact surface, the diameter of the enveloping circle of the inner ring of the roller is larger than the outer diameter of the small flange of the inner ring.
In one example, when the roller is placed in the window hole and is in contact with the assembly contact surface, the diameter of an enveloping circle of the roller inner ring is 1mm to 1.5mm larger than the outer diameter of the small rib of the inner ring.
In one example, the working contact surface occupies two thirds of the length of the press ramp surface, and the mating contact surface occupies one third of the length of the press ramp surface.
In one example, the outer diameter of the large end ring is greater than 200 mm.
In one example, the outer diameter of the large end ring is equal to or greater than 300 mm.
On the other hand, the application also provides a tapered roller bearing, which is characterized by comprising an outer ring, an inner ring, rollers and the expansion-free tapered roller bearing retainer.
Exempt from to expand tapered roller bearing holder and tapered roller bearing that this application provided can bring following beneficial effect:
1. the assembly contact surface is bent towards the outer side of the corresponding window hole along the circumferential direction of the expansion-free tapered roller bearing retainer relative to the working contact surface, so that when the roller is contacted with the assembly contact surface, the diameter of the enveloping circle of the inner ring of the roller is enlarged, the assembly is convenient, the expansion and contraction processes are not needed for the assembly of the expansion-free tapered roller bearing retainer, a riveting die is not needed in the assembly process, the structure of other components of the tapered roller bearing is not needed to be changed, the assembly is convenient and simple, the expansion-free tapered roller bearing retainer does not generate plastic deformation in the assembly process, the data of the expansion-free tapered roller bearing retainer after assembly is consistent with the data of the conical roller bearing retainer before assembly is ensured, the stability of the clearance of the tapered roller bearing is improved, the strength of the expansion-free tapered roller bearing retainer is ensured, the, is beneficial to reducing the production cost and improving the production efficiency.
2. When the roller is arranged in the window hole and contacts with the assembling contact surface, the diameter of the enveloping circle of the roller inner ring is 1mm to 1.5mm larger than the outer diameter of the small flange of the inner ring, so that the assembly is convenient, enough assembly space is provided during the assembly, the assembly of the expansion-free tapered roller bearing retainer does not need to be subjected to expansion and contraction processes, the assembly is simpler and more convenient, and the efficiency is higher.
3. The working contact surface accounts for two thirds of the length direction of the pressure slope surface, and the assembly contact surface accounts for one third of the length direction of the pressure slope surface, so that the normal clearance and the convenient assembly of the tapered roller bearing can be ensured, and the quality and the production efficiency of the tapered roller bearing can be favorably improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of the assembly of the inner assembly of a prior art tapered roller bearing;
FIG. 2 is a schematic structural diagram of an expanding-free tapered roller bearing cage according to an embodiment of the present application;
FIG. 3 is a schematic view illustrating an assembly process of an expanding-free tapered roller bearing cage according to an embodiment of the present application;
FIG. 4 is a schematic plan view of a fenestration provided by an embodiment of the present application;
fig. 5 is a schematic perspective view of a window hole provided in an embodiment of the present application.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the description of the present application, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, references to the description of the terms "an aspect," "some aspects," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same solution or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.
As shown in fig. 2 to 5, an embodiment of the present application proposes an expansion-free tapered roller bearing cage 100, which includes a large end ring 1, a small end ring 2, and window hole beams 3 connecting the large end ring 1 and the small end ring 2, two adjacent window hole beams 3, the large end ring 1 and the small end ring 2 enclosing a window hole 4 for placing a roller 200; the inner diameter of the large end ring 1 is larger than that of the small end ring 2, and the plurality of window holes 4 are uniformly distributed at equal intervals in the circumferential direction of the expansion-free tapered roller bearing cage 100. The rollers 200 can be respectively placed in the corresponding window holes 4, and the window hole beams 3 sequentially separate the rollers 200 to prevent the rollers 200 from colliding and rubbing with each other and avoid the abrasion and unstable operation of the tapered roller bearing; the enveloping circle enclosed by the inner sides of the small ends of all the rollers 200 is the enveloping circle of the inner ring of the roller.
The two sides of the window hole beam 3 are respectively provided with the slope pressing surfaces 31 which are contacted with the rollers 200, so that the contact between the rollers 200 and the ridge lines of the window hole beam 3 can be avoided, the integral strength of the expansion-free tapered roller bearing retainer 100 is improved, the contact performance between the window hole beam 3 and the rollers 200 is improved, and the flexible reliability of the operation of the tapered roller bearing is improved. The press slope surface 31 comprises a working contact surface 311 close to the large end ring 1 and an assembly contact surface 312 close to the small end ring 2, and the assembly contact surface 312 is bent relative to the working contact surface 311 along the outer side of the window hole 4 corresponding to the circumferential direction of the expansion-free tapered roller bearing retainer 100, so that when the roller 200 is in contact with the assembly contact surface 312, the diameter of the enveloping circle of the inner ring of the roller is increased, the assembly is convenient, the assembly of the expansion-free tapered roller bearing retainer 100 does not need to be carried out through expansion and contraction processes, a riveting die is not needed in the assembly process, the structure of other components of the tapered roller bearing is not needed to be changed, the assembly is convenient and simple, the expansion-free tapered roller bearing retainer 100 does not generate plastic deformation in the assembly process, the data of the expansion-free tapered roller bearing retainer 100 after assembly is consistent with the data before assembly, the stability of the clearance of the tapered roller, the tapered roller bearing has higher bearing capacity, the overall quality of the tapered roller bearing is improved, and the reduction of the production cost and the improvement of the production efficiency are facilitated. By improving the shape structure of the window hole 4, the width of the window hole 4 of the expansion-free tapered roller bearing retainer 100 close to one end of the small end ring 2 is increased, the same assembly effect as that of the existing tapered roller bearing can be achieved, the expansion-free tapered roller bearing retainer 100 is still kept in an original state after assembly, the clearance of the tapered roller bearing is unrelated to the length of the roller 200, the height of the expansion-free tapered roller bearing retainer 100, the precision of riveting equipment and the like, and the stability of the bearing clearance in the tapered roller bearing batch is improved.
When the expansion-free tapered roller bearing retainer 100 is assembled, firstly, the rollers 200 are sequentially placed into the window holes 4, and then the inner ring 300 is placed into an annular roller group formed by the rollers 200; because the diameter of the roller inner ring enveloping circle is 1mm to 1.5mm smaller than the outer diameter of the small flange 301 of the inner ring 300, the inner ring 300 cannot fall down in a natural state, the whole roller group needs to be lifted by a certain height, so that the roller 200 is in contact with the assembly contact surface 312, the diameter of the roller inner ring enveloping circle is increased, and then the roller inner ring enveloping circle naturally falls down, the inner ring 300 is smoothly arranged in the annular roller group to form a complete inseparable inner assembly by means of the gravity inertia of the assembly and the elastic deformation of the expansion-free tapered roller bearing retainer 100. In one embodiment, the non-expanding tapered roller bearing retainer 100 is made of metal, may be a stamped steel retainer, and may have a certain elastic deformation.
Specifically, when the roller 200 is placed in the window hole 4 and contacts with the working contact surface 311, the diameter of the enveloping circle of the roller inner ring is smaller than the outer diameter of the small rib 301 of the inner ring 300, the roller 200 is reliably locked on the inner ring 300 by the expansion-free tapered roller bearing retainer 100, an inseparable inner assembly is formed, the contact area between the roller 200 and the slope pressing surface 31 can be reduced, the running noise of the tapered roller bearing is reduced, the running flexibility is improved, and the service life of the tapered roller bearing and the expansion-free tapered roller bearing retainer 100 is prolonged; the diameter of the roller inner ring envelope circle at this time is defined as the inner diameter of the roller group, and the width of the window hole 4 near one end of the large end ring 1, the length of the window hole 4, and the inner diameter of the roller group are designed in the same manner as those of the prior art tapered roller bearing cage. When the roller 200 is arranged in the window hole 4 and is contacted with the assembling contact surface 312, the diameter of the enveloping circle of the inner ring of the roller is larger than the outer diameter of the small flange 301 of the inner ring 300, so that enough assembling space is ensured during assembling, and the assembling is simpler and more convenient; the diameter of the enveloping circle of the roller inner ring at this time is defined as the inner diameter of the assembling roller set, and the width of the window hole 4 at the end close to the small end ring 2 is adjusted according to the inner diameter of the assembling roller set.
Specifically, when the roller 200 is placed in the window hole 4 and contacts the assembly contact surface 312, the diameter of the inner ring enveloping circle of the roller 200 (i.e., the inner diameter of the assembly roller set) is 1mm to 1.5mm larger than the outer diameter of the small rib 301 of the inner ring 300, so that the assembly is facilitated, an enough assembly space is ensured during the assembly, the assembly of the expansion-free tapered roller bearing retainer 100 does not need to be subjected to expansion and contraction processes, the assembly is simpler and more convenient, and the efficiency is higher.
Specifically, the working contact surface 311 occupies two thirds of the length of the pressure slope surface 31, and the fitting contact surface 312 occupies one third of the length of the pressure slope surface 31. When the tapered roller bearing is in a normal working state, the roller 200 is in contact with the working contact surface 311, so that the normal clearance of the tapered roller bearing is ensured; when the tapered roller bearing is assembled, the roller 200 is in contact with the assembling contact surface 312, so that the inner diameter of the roller group for assembly is increased, the assembly is facilitated, and the quality and the production efficiency of the tapered roller bearing are improved.
Specifically, the outer diameter of the large end ring 1 is larger than 200mm, and the expansion-free tapered roller bearing retainer 100 is suitable for a tapered roller bearing with a large end outer diameter larger than 200mm, and has a wide application prospect. In a preferred embodiment, the outer diameter of the large end ring 1 is greater than or equal to 300mm, the expansion-free tapered roller bearing retainer 100 is suitable for a heavy-duty tapered roller bearing, the service life of the heavy-duty tapered roller bearing can be prolonged, the bearing capacity is improved, and the use value and the economic benefit are relatively remarkable.
Another embodiment of the present application proposes a tapered roller bearing, which includes an outer ring (not shown in the drawings), an inner ring 300, rollers 200, and the non-expanding tapered roller bearing cage 100 given by any of the embodiments described above, the rollers 200 being placed in the window holes 4 of the non-expanding tapered roller bearing cage 100.
In one embodiment, the expanding-free tapered roller bearing cage 100 of the present application is applied to the tapered roller bearings LM761649 and 7777779 for rolling mills. After assembly, the clearance variation of the single tapered roller bearing is less than 0.2mm, the clearance variation of the tapered roller bearings in batches is less than 0.3mm, the tapered roller bearings rotate flexibly, no noise exists, and a satisfactory effect is achieved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. An expansion-free tapered roller bearing cage, which comprises a large end ring, a small end ring and window beams connecting the large end ring and the small end ring, wherein two adjacent window beams, the large end ring and the small end ring define windows for placing rollers,
the window hole beam is provided with a slope pressing surface in contact with the rollers, the slope pressing surface comprises a working contact surface close to the large end ring and an assembling contact surface close to the small end ring, and the assembling contact surface is bent relative to the working contact surface along the outer side of the window hole corresponding to the circumferential direction of the expansion-free tapered roller bearing retainer.
2. The non-expanding tapered roller bearing cage of claim 1,
when the roller is arranged in the window hole and is in contact with the working contact surface, the diameter of the enveloping circle of the inner ring of the roller is smaller than the outer diameter of the small flange of the inner ring; when the roller is arranged in the window hole and is in contact with the assembling contact surface, the diameter of the enveloping circle of the inner ring of the roller is larger than the outer diameter of the small flange of the inner ring.
3. The expanding-free tapered roller bearing cage of claim 2,
when the roller is arranged in the window hole and is in contact with the assembling contact surface, the diameter of the enveloping circle of the inner ring of the roller is 1mm to 1.5mm larger than the outer diameter of the small flange of the inner ring.
4. The non-expanding tapered roller bearing cage of claim 1,
the working contact surface occupies two thirds of the length direction of the pressure slope surface, and the assembly contact surface occupies one third of the length direction of the pressure slope surface.
5. The expanding-free tapered roller bearing cage according to any one of claims 1 to 4,
the outer diameter of the large end ring is larger than 200 mm.
6. The expanding-free tapered roller bearing cage of claim 5,
the outer diameter of the large end ring is larger than or equal to 300 mm.
7. A tapered roller bearing characterized by comprising an outer ring, an inner ring, rollers, and the expansion-free tapered roller bearing cage according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920938154.3U CN210196273U (en) | 2019-06-20 | 2019-06-20 | Expansion-free tapered roller bearing retainer and tapered roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920938154.3U CN210196273U (en) | 2019-06-20 | 2019-06-20 | Expansion-free tapered roller bearing retainer and tapered roller bearing |
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| CN210196273U true CN210196273U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920938154.3U Active CN210196273U (en) | 2019-06-20 | 2019-06-20 | Expansion-free tapered roller bearing retainer and tapered roller bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431853A (en) * | 2020-12-04 | 2021-03-02 | 洛阳新强联回转支承股份有限公司 | Super-huge tapered roller bearing without expanding and contracting basket-shaped retainer |
| CN112443572A (en) * | 2020-12-04 | 2021-03-05 | 洛阳新强联回转支承股份有限公司 | Super-huge tapered roller turntable bearing with detachable small flange |
-
2019
- 2019-06-20 CN CN201920938154.3U patent/CN210196273U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431853A (en) * | 2020-12-04 | 2021-03-02 | 洛阳新强联回转支承股份有限公司 | Super-huge tapered roller bearing without expanding and contracting basket-shaped retainer |
| CN112443572A (en) * | 2020-12-04 | 2021-03-05 | 洛阳新强联回转支承股份有限公司 | Super-huge tapered roller turntable bearing with detachable small flange |
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