CN210661043U - Pretightening force adjustable precision combined bearing - Google Patents
Pretightening force adjustable precision combined bearing Download PDFInfo
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- CN210661043U CN210661043U CN201921700572.5U CN201921700572U CN210661043U CN 210661043 U CN210661043 U CN 210661043U CN 201921700572 U CN201921700572 U CN 201921700572U CN 210661043 U CN210661043 U CN 210661043U
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000036316 preload Effects 0.000 claims 5
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model relates to a precise combination bearing with adjustable pretightening force, which comprises a small bearing inner ring, a large bearing inner ring, a bearing outer ring, an axial retainer, an axial roller and a radial roller; the axial rollers are tapered rollers, the linear speeds of the two ends of each axial roller are consistent, tapered grooves matched with the axial rollers in size and shape are formed in the axial retainer, the axial rollers are installed in the tapered grooves, and the surfaces of the small bearing inner ring and the large bearing inner ring, which are respectively contacted with the axial rollers, are inclined surfaces matched with the tapered surfaces of the axial rollers; the outer end of the axial roller is provided with a pre-tightening device capable of adjusting pre-tightening force, and the pre-tightening device is arranged outside the axial retainer; the radial roller is a spherical roller; the pre-tightening device comprises a piston, a spring and a small threaded plug, and the spring is connected with the axial roller through a small ball body. The utility model has the advantages of the transmission rigidity is big, does not receive the poor influence of long-time moving speed, and the transmission is steady, simple to operate, machine moving precision height.
Description
Technical Field
The utility model belongs to the technical field of the bearing, especially, relate to an accurate combination bearing of adjustable pretightning force.
Background
Most of the conventional YRT bearings are driven by cylindrical rollers to bear axial force, and can perform predetermined work under normal conditions, but because the rollers are cylindrical, the linear velocity near one end of the rotation center is lower than that far away from the rotation center during normal work, so that a velocity difference occurs. When this speed difference is accumulated, it is expressed in the form of a small displacement of the cylindrical roller, and finally, a small displacement of the cylindrical roller is caused to be jumped. Macroscopically, a thrust roller bearing using a cylindrical roller as a rotor may occasionally vibrate under normal working conditions, and the vibration is released when a previously accumulated speed difference is accumulated to a certain degree, so as to ensure that the roller returns to the original position. And the radial roller of the traditional YRT bearing is inconvenient to mount and difficult to eliminate the gap, so that the rigidity of the shaft is reduced, and the normal work of the bearing is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a precise combined bearing with adjustable pretightening force, which effectively solves the problems that the traditional YRT bearing is difficult to assemble, the axial roller is unstable in operation and the radial roller can not control the clearance; the bearing is ensured to work stably, and the transmission rigidity is enhanced.
The utility model is realized in such a way that the precise combined bearing with adjustable pretightening force comprises a small bearing inner ring, a large bearing inner ring, a bearing outer ring, an axial retainer, an axial roller and a radial roller; the axial rollers are tapered rollers, linear speeds of two ends of each axial roller are consistent, tapered grooves matched with the axial rollers in size and shape are formed in the axial retainer, the axial rollers are installed in the tapered grooves, and the surfaces of the small bearing inner ring and the large bearing inner ring, which are respectively contacted with the axial rollers, are inclined surfaces matched with the tapered surfaces of the axial rollers; the outer end of the axial roller is provided with a pre-tightening device capable of adjusting pre-tightening force, and the pre-tightening device is installed at the top of the axial retainer.
In the above technical scheme, preferably, the pre-tightening device includes a piston, a spring and a small threaded plug, the inner side of the piston is provided with a spring hole matched with the spring, the outer side of the piston is provided with a threaded hole matched with the small threaded plug, and the small threaded plug is screwed into the threaded hole to compress the spring.
In the above solution, it is further preferable that the spring is connected to the axial roller through a small ball.
In the above technical solution, it is further preferable that a ball groove for placing a small ball is provided on an outer end surface of the axial roller, one end of the small ball is mounted on the ball groove, and the other end of the small ball is in contact with the spring.
In the above technical solution, it is further preferable that the spring hole and the threaded hole are coaxial.
In the above technical solution, preferably, the radial roller is a spherical roller.
In the above technical solution, it is further preferable that a radial roller groove is provided on an outer side wall of the large bearing inner ring, a groove is formed in a lower portion of the outer side wall of the large bearing inner ring, the groove has a depth equal to that of the radial roller groove, and a steel ring is provided in the lower portion of the radial roller groove.
In the above technical scheme, preferably, a lubrication groove is arranged around the tapered groove.
In the above technical solution, preferably, the bearing outer ring is provided with an oil hole for allowing oil to pass through the axial roller and the radial roller.
Compared with the prior art, the utility model has the advantages and positive effect be:
the utility model adopts a brand new technical proposal, and has the advantages of high transmission rigidity, no influence of long-time running speed difference, stable transmission, convenient installation, high precision of machine running, and the like; the speed difference influence of the YRT bearing axial roller is solved, the problem that the bearing radial roller is inconvenient to mount is solved, and the high-precision equipment is guaranteed to keep continuous and stable operation; the device can be used in the fields of high-precision numerical control turntables, dividing heads, military radars, aviation, aerospace, measuring instruments and the like which require large axial thrust, stable motion requirements and high precision.
Drawings
FIG. 1 is a front view of a bearing assembly provided by an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a partial enlarged view of portion H of FIG. 3;
fig. 5 is an assembly schematic view of an axial roller and its axial cage provided by an embodiment of the present invention;
FIG. 6 is a cross-sectional view B-B of FIG. 5;
FIG. 7 is an enlarged view of a portion I of FIG. 5;
fig. 8 is a cross-sectional view of an axial retainer at a tapered recess provided by an embodiment of the present invention;
fig. 9 is a schematic view of a single axial roller installation bearing axial force components provided by an embodiment of the present invention;
FIG. 10 is a top view of FIG. 9;
fig. 11 is an assembly diagram of a radial roller bearing radial force and its cage according to an embodiment of the present invention;
FIG. 12 is a top view of FIG. 11;
fig. 13 is a schematic structural view of a small bearing inner ring provided in an embodiment of the present invention;
FIG. 14 is a cross-sectional view C-C of FIG. 13;
fig. 15 is a schematic structural diagram of a bearing outer ring according to an embodiment of the present invention;
FIG. 16 is a cross-sectional view D-D of FIG. 15;
fig. 17 is a schematic structural view of a large inner ring of a bearing provided in an embodiment of the present invention;
FIG. 18 is a cross-sectional view E-E of FIG. 17;
figure 19 is a cross-sectional view of a bearing assembly provided in accordance with an embodiment of the present invention at a bearing outer race oil hole;
fig. 20 is a partially enlarged view of a portion J in fig. 19.
In the figure: 1. a bearing assembly; 2. a small inner ring of the bearing; 3. a bearing outer race; 4. a large inner ring of the bearing; 5. steel rings; 6. a bolt; 7. an axial cage; 71-a tapered recess; 8. a lubrication groove; 9. a small threaded plug; 10. a piston; 11. a spring; 12. a small sphere; 13. an axial roller; 131-a sphere groove; 14. a radial roller; 15. and an oil hole.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
in the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1 to 20, the present embodiment provides a precision combined bearing with an adjustable pre-tightening force, including a small bearing inner ring 2, a large bearing inner ring 4, a bearing outer ring 3, an axial retainer 7, an axial roller 13 and a radial roller 14, where the axial roller 13 is a tapered roller, and linear velocities at two ends of the axial roller are the same, the axial retainer 7 is provided with a tapered groove 71 matched with the size and shape of the axial roller 13, the axial roller 13 is installed in the tapered groove 71, surfaces of the small bearing inner ring 2 and the large bearing inner ring 4 contacting the axial roller 13 are both inclined surfaces matched with the tapered surface of the axial roller, a main body of the axial retainer has a very large rigidity, and in terms of bearing an axial force, the axial roller is made into a tapered roller with a certain taper, so that the linear velocity of the bearing in operation is the same at. The tapered groove 71 in the axial retainer 7 is matched with the axial roller 13 in shape, so that the axial roller is stable and has no play in the bearing. The outer end of the axial roller 13 is provided with a pre-tightening device capable of adjusting pre-tightening force, the pre-tightening device is installed at the top of the axial retainer 7, and the pre-tightening force is adjusted through the pre-tightening device, so that the axial roller does not move up and down in the axial retainer. The radial roller 14 is a spherical roller, and in the aspect of bearing radial force, the spherical roller is adopted, so that clearance elimination and installation of the bearing are facilitated.
As a preferred embodiment, referring to fig. 9, the pre-tightening device comprises a piston 10, a spring 11 and a small threaded plug 9, wherein a spring hole matched with the spring 11 is formed in the inner side of the piston 10, a threaded hole matched with the small threaded plug 9 is formed in the outer side of the piston 10, and the small threaded plug 9 is screwed into the threaded hole to compress the spring 11; spring 11 is connected with axial roller 13 through a bobble 12, be equipped with the spheroid recess 131 of placing the bobble on axial roller 13's the outer terminal surface, the one end of bobble 12 is installed on spheroid recess 131, and the other end contacts with spring 11, and simple to operate and stability has reduced frictional force through the bobble of axial roller upper end, and through the little thread plug on adjusting the top in order to adjust the pretightning force, makes axial roller do not have the drunkenness from top to bottom in the axial holder. In addition, to ensure uniform compression between the small threaded plug and the spring, the spring bore and the threaded bore are arranged coaxially.
As a preferred embodiment, referring to fig. 4 and 18, the outer side wall of the large bearing inner ring 4 is provided with a radial roller groove, the outer side wall of the large bearing inner ring is grooved at a groove lower part positioned in the radial roller groove, the groove depth is the same as the radial roller groove depth, and a steel ring 5 is arranged at the groove lower part of the radial roller groove. The large inner ring of the bearing is divided into two parts, one part is a normal inner ring, the other part is the lower part of the radial roller groove, materials below the radial roller groove are removed, and the large inner ring is connected with the upper part in a threaded steel ring mode, so that the installation of the radial roller and the retainer thereof is facilitated.
In addition, referring to fig. 7 and 8, the tapered groove 71 is provided with a lubrication groove 8 around, referring to fig. 19 and 20, the bearing outer ring 3 is provided with the oil hole 15, specifically, the oil hole 15 may be provided in a cross-shaped structure, oil is injected from the outer side end face of the bearing outer ring 3, that is, the oil can be led to the axial roller and the radial roller, and the lubrication groove 8 and the oil hole 15 ensure lubrication during the use of the bearing.
The utility model discloses a concrete mounting means as follows:
firstly, mounting a small threaded plug 9 into a threaded hole of a piston 10;
secondly, a spring 11 is arranged in a spring hole of the piston 10;
thirdly, the small ball 12 is mounted on the ball groove 131 of the axial roller 13, and the other side of the small ball 12 is mounted on the spring 11, as shown in fig. 8;
fourthly, the whole body is arranged on the axial retainer 7, the axial rollers 13 are just matched with the tapered grooves 71 of the axial retainer 7, and then the piston 10 is screwed with the axial retainer 7 through screws, as shown in figures 5-6;
fifthly, adjusting the small threaded plug 9 to adjust the pretightening force;
sixthly, mounting the assembled first row of axial rollers and the axial retainer on an axial raceway of the small bearing inner ring 2, wherein the upper surfaces of the axial rollers are matched with the surface of the small bearing inner ring and form a certain included angle with the horizontal plane, and the axes of the axial rollers point to the rotation center of the bearing;
seventhly, mounting the radial rollers 14 and the retainer thereof on a radial raceway of the bearing;
eighthly, mounting the steel ring 5 on the large inner ring 4 of the bearing to form a complete radial raceway;
ninthly, mounting a bearing outer ring 3;
tenthly, mounting the assembled second row of axial rollers and the assembled axial retainer on a second row of axial roller paths;
and eleventh, installing the large bearing inner ring 4, installing a pre-tightening bolt 6, and locking the small bearing inner ring 2 and the large bearing inner ring 4 to complete the installation of the bearing assembly 1.
After the bearing is installed, in the aspect of bearing the axial force, the rigidity of the axial roller is higher due to the fact that the pretightening force is adjusted, the phenomenon that the bearing moves in operation is avoided, and the bearing can stably operate for a long time due to the fact that linear speeds of two ends of the axial roller are consistent. The wall thickness of the axial retainer of the bearing is large, the tapered groove is just matched with the axial roller, so that the bearing cannot jump during operation, the spring in the piston is connected with the axial roller through a ball, so that the friction force received by the axial roller is small, the rotation of the axial roller is not influenced, and the axial retainer is provided with a manufactured lubricating groove, so that the lubricating problem of the bearing during use is solved.
In the aspect of bearing radial force, the spherical roller is adopted, and the large inner ring of the bearing is improved, so that the radial roller of the bearing is convenient to mount and is beneficial to eliminating backlash.
The utility model has the advantages of the transmission rigidity is big, does not receive the poor influence of long-time moving speed, and the transmission is steady, simple to operate, machine running accuracy height.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (9)
1. A precise combined bearing with adjustable pretightening force comprises a small bearing inner ring, a large bearing inner ring, a bearing outer ring, an axial retainer, an axial roller and a radial roller; the axial roller is a tapered roller, the linear speeds of two ends of the axial roller are consistent, a tapered groove matched with the axial roller in size and shape is arranged on the axial retainer, the axial roller is arranged in the tapered groove, and the surfaces of the small bearing inner ring and the large bearing inner ring, which are respectively contacted with the axial roller, are inclined surfaces matched with the tapered surfaces of the axial roller; the outer end of the axial roller is provided with a pre-tightening device capable of adjusting pre-tightening force, and the pre-tightening device is installed outside the axial retainer.
2. The precision combination bearing with the adjustable pretightening force of claim 1, wherein the pretightening device comprises a piston, a spring and a small threaded plug, the inner side of the piston is provided with a spring hole matched with the spring, the outer side of the piston is provided with a threaded hole matched with the small threaded plug, and the small threaded plug is screwed into the threaded hole to compress the spring.
3. The adjustable preload precision combination bearing of claim 2, wherein the spring is connected to the axial roller by a small ball.
4. The precision combination bearing with adjustable pretightening force of claim 3, wherein the outer end face of the axial roller is provided with a sphere groove for placing a small sphere, one end of the small sphere is installed on the sphere groove, and the other end of the small sphere is in contact with the spring.
5. The adjustable preload precision combination bearing of claim 2, wherein the spring bore and the threaded bore are concentric.
6. The adjustable preload precision combination bearing according to claim 1, wherein the radial rollers are spherical rollers.
7. The precision combination bearing with the adjustable pretightening force of claim 6, wherein the outer side wall of the large bearing inner ring is provided with a radial roller groove, the outer side wall of the large bearing inner ring is grooved at the lower part of the groove positioned in the radial roller groove, the depth of the groove is the same as that of the radial roller groove, and a steel ring is arranged at the lower part of the groove of the radial roller groove.
8. The adjustable preload precision combination bearing according to claim 1, wherein lubrication grooves are formed around the tapered grooves.
9. The adjustable preload precision combination bearing of claim 1, wherein the bearing outer race is provided with oil holes for oil to pass to the axial rollers and the radial rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921700572.5U CN210661043U (en) | 2019-10-11 | 2019-10-11 | Pretightening force adjustable precision combined bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921700572.5U CN210661043U (en) | 2019-10-11 | 2019-10-11 | Pretightening force adjustable precision combined bearing |
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| Publication Number | Publication Date |
|---|---|
| CN210661043U true CN210661043U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921700572.5U Active CN210661043U (en) | 2019-10-11 | 2019-10-11 | Pretightening force adjustable precision combined bearing |
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| CN (1) | CN210661043U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566577A (en) * | 2019-10-11 | 2019-12-13 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Pretightening force adjustable precision combined bearing |
-
2019
- 2019-10-11 CN CN201921700572.5U patent/CN210661043U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566577A (en) * | 2019-10-11 | 2019-12-13 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Pretightening force adjustable precision combined bearing |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240329 Address after: No.9, Haitai development road 4, Huayuan new technology industrial park, Binhai New Area, Tianjin Patentee after: Tianjin Saixiang Technology Co.,Ltd. Country or region after: China Address before: No. 1310 Dagu South Road, Jinnan District, Tianjin Patentee before: TIANJIN University OF TECHNOLOGY AND EDUCATION (CHINA VOCATIONAL TRAINING INSTRUCTOR TRAINING CENTER) Country or region before: China |
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| TR01 | Transfer of patent right |