CN109595258B - Automatic radial clearance adjusting mechanism for large bearing - Google Patents
Automatic radial clearance adjusting mechanism for large bearing Download PDFInfo
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- CN109595258B CN109595258B CN201811274812.XA CN201811274812A CN109595258B CN 109595258 B CN109595258 B CN 109595258B CN 201811274812 A CN201811274812 A CN 201811274812A CN 109595258 B CN109595258 B CN 109595258B
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- 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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
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- Rolling Contact Bearings (AREA)
Abstract
The invention relates to an automatic radial clearance adjusting mechanism for a large bearing, which structurally comprises: the inner side surface of the bearing outer ring is provided with the dustproof shell and has the same axis, the inner surface of the bearing outer ring is embedded with the balls, when the large-scale bearing rotates at high speed, the internal friction produces high temperature, the air of high temperature is filled in the hot pressing auxiliary adjusting device, the liquid ball that makes the inside air of pressure boost jar intensification inflation cooperation grow promotes the hot pressing and promotes the piston, make the radial regulation arc board that promotes the piston looks drive connection with the hot pressing and pull the radial regulation of radial regulation circle outwards expand the cooperation auxiliary adjusting plate and form a play adjustment mechanism of bigger diameter, make play adjustment mechanism side after the expansion hug closely the surface of ball, eliminate the inside radial play of large-scale bearing, the temperature rise can be slowed down when making large-scale bearing operation, the noise can be reduced, alleviate the inside vibration of bearing simultaneously in order to prolong the life-span of bearing rolling fatigue.
Description
Technical Field
The invention discloses an automatic radial clearance adjusting mechanism for a large bearing, and relates to the field of bearing processing.
Background
The bearing clearance is a clearance between a bearing rolling element and a bearing inner and outer ring shell, the running performance and the service life of the bearing are influenced by the size of the clearance, the influence is more severe in a large-scale bearing, therefore, various performances of the bearing are improved by adjusting the bearing clearance, and generally, the clearance is reduced or disappears by measuring the clearance and inserting a gasket into the clearance, so that the performance of the bearing is improved.
However, the material of the washer for adjusting the bearing clearance is generally different from the original material of the bearing, the high temperature generated by the high-speed rotation of the large-scale bearing is different from the expansion degree of the body in the high temperature, the rising rate of the temperature is different from the expansion degree of the body in the high temperature, the expanded bearing inner ring supports the washer out of fine cracks to influence the service life or hoops the warming expanded inner ring out of imprints, the integral smoothness of the inner ring is influenced, meanwhile, because of the difference of the material, the oil content and the hardness in the material are deviated, the abrasion of the steel balls in the large-scale bearing is aggravated or the loss of the gasket is accelerated, and the service time of.
Therefore, it is necessary to provide an automatic radial play adjusting mechanism for a large bearing.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an automatic radial clearance adjusting mechanism for a large bearing, which solves the problem that the negative influence on the work of the bearing is influenced due to overlarge radial clearance in the large bearing.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a large-scale bearing radial play automatically regulated mechanism which the structure includes: bearing inner race, dust-proof shell, ball, play adjustment mechanism, bearing inner race, the medial surface of bearing inner race has installed dust-proof shell and same axle center, bearing inner race internal surface embedding installs the ball, the ball lower surface is laminated mutually with play adjustment mechanism surface, play adjustment mechanism internal surface embedding installs the bearing inner race.
According to a preferable scheme of the invention, the clearance adjusting mechanism comprises a radial adjusting ring, a hot-pressing auxiliary adjusting device and a hot-air circulation ring, wherein the inner surface of the radial adjusting ring is in transmission connection with the outer surface of the hot-pressing auxiliary adjusting device, and the hot-air circulation ring is arranged on the inner surface of the hot-pressing auxiliary adjusting device and is coaxial with the hot-air circulation ring.
According to the preferable scheme of the invention, the radial adjusting ring comprises a transmission rod, a radial adjusting arc plate, an auxiliary adjusting plate and a linkage rod, the top end of the transmission rod is hinged with the lower surface of the radial adjusting arc plate, the auxiliary adjusting plate is embedded in the radial adjusting arc plate, and the upper surface of the radial adjusting arc plate is in transmission connection with the lower end of the linkage rod.
As a preferable scheme of the present invention, the hot pressing auxiliary adjusting device includes a pressure increasing tank, a hot pressing push rod, a hot pressing push piston, a liquid ball, a base, and a connecting plate, the hot pressing push rod is embedded and installed inside the pressure increasing tank, the bottom end of the hot pressing push rod is fixedly connected to the upper surface of the hot pressing push piston, the lower surface of the hot pressing push piston is attached to the upper surface of the liquid ball, the lower surface of the pressure increasing tank is fixedly connected to the upper surface of the base by welding, and the pressure increasing tank is embedded and installed inside the connecting plate.
As a preferable scheme of the present invention, the liquid ball includes a ball body, a separation chamber, a ball chamber and a drain pipe, the separation chamber is arranged inside the ball body and is an integrated structure, the ball chamber is arranged inside the separation chamber, and an outer surface of the ball chamber is connected with a head end of the drain pipe.
The hot air circulation ring comprises a central shaft, rotary blades, a protective shell and circulation holes, wherein the central shaft is embedded and sleeved with the centers of the rotary blades, the tail end of the central shaft is fixedly connected with the inner surface of the protective shell in a welding mode, and the two sides of the protective shell are provided with the circulation holes and are of an integrated structure.
As a preferable scheme of the invention, the rotary paddle comprises a rotary shaft sleeve, a spring paddle and a centrifugal ball, the spring paddle is arranged on the outer surface of the rotary shaft sleeve, and the tail end of the spring paddle is connected with the centrifugal ball in a welding mode.
According to the preferable scheme of the invention, the auxiliary adjusting plate is nested in the radial adjusting arc plate, when the diameter of the adjusting clearance adjusting mechanism is expanded outwards by the radial adjusting arc plate, the gap is filled up due to the expansion of the radial adjusting arc plate and the gap is reserved, and the auxiliary adjusting plate nested in the radial adjusting arc plate extends out, so that the rolling ball is more stable when rolling on the surface of the rolling ball.
According to the preferable scheme of the invention, a plurality of separation cavities are arranged in the liquid ball, the liquid in the ball chamber is filled into the separation cavities when being heated and expanded by utilizing the plurality of separation cavities, the expansion of the ball body of the liquid ball is accelerated by accelerating the heating and expansion of the plurality of separation cavities, and the hot pressing is pushed more quickly to assist in adjusting the clearance of the bearing.
(III) advantageous effects
Compared with the prior art, the invention provides an automatic radial clearance adjusting mechanism for a large bearing, which has the following beneficial effects:
when the large-scale bearing rotates at a high speed, high temperature is generated by internal friction, high-temperature air is filled in the hot-pressing auxiliary adjusting device, air in the pressure boosting tank is heated and expanded to match with the enlarged liquid ball to push the hot-pressing pushing piston, a transmission rod in transmission connection with the hot-pressing pushing piston pulls the radial adjusting arc plate of the radial adjusting ring to expand outwards to match with the auxiliary adjusting plate to form a clearance adjusting mechanism with a larger diameter, the side face of the enlarged clearance adjusting mechanism is tightly attached to the surface of the ball, the radial clearance in the large-scale bearing is eliminated, the temperature rise of the large-scale bearing during operation is slowed down, the noise is reduced, and meanwhile, the vibration in the bearing is relieved to prolong the service life of the rolling.
Drawings
Fig. 1 is a schematic structural diagram of an automatic radial clearance adjusting mechanism for a large bearing according to the present invention.
Fig. 2 is a schematic structural view of a lash adjustment mechanism of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 2 according to the present invention.
Fig. 4 is a structural sectional view showing the operation of a lash adjusting mechanism of the present invention.
FIG. 5 is a sectional view of a hot press auxiliary adjustment apparatus according to the present invention.
FIG. 6 is a cross-sectional view of a liquid ball according to the present invention.
FIG. 7 is a cross-sectional view of a hot gas flow ring according to the present invention.
FIG. 8 is a schematic view of a rotary blade according to the present invention.
Description of reference numerals: the device comprises a bearing outer ring-1, a dustproof shell-2, a ball-3, a play adjusting mechanism-4, a bearing inner ring-5, a radial adjusting ring-41, a hot-pressing auxiliary adjusting device-42, a hot air circulation ring-43, a transmission rod-411, a radial adjusting arc plate-412, an auxiliary adjusting plate-413, a linkage rod-414, a pressure boost tank-421, a hot-pressing push rod-422, a hot-pressing push piston-423, a liquid ball-424, a base-425, a linkage plate-426, a ball-4241, a separation cavity-4242, a ball center chamber-4243, a liquid discharge pipe-4244, a central shaft-431, a rotary paddle-432, a protective shell-433, a circulation hole-434, a rotary shaft sleeve-4321, a spring paddle-4322 and a centrifugal ball-4323.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1 to 8, the present invention provides an automatic radial play adjusting mechanism for a large bearing, which includes: bearing inner race 1, dust-proof housing 2, ball 3, play adjustment mechanism 4, bearing inner race 5, dust-proof housing 2 and same axle center have been installed to bearing inner race 1's medial surface, 1 internal surface embedding in bearing inner race installs ball 3, 3 lower surfaces of ball laminate mutually with 4 surfaces of play adjustment mechanism, 4 internal surface embedding in play adjustment mechanism installs bearing inner race 5.
The clearance adjusting mechanism 4 comprises a radial adjusting ring 41, a hot-pressing auxiliary adjusting device 42 and a hot-air circulation ring 43, the inner surface of the radial adjusting ring 41 is in transmission connection with the outer surface of the hot-pressing auxiliary adjusting device 42, and the hot-air circulation ring 43 is arranged on the inner surface of the hot-pressing auxiliary adjusting device 42 and is in the same axis.
The hot-pressing auxiliary adjusting device 42 comprises a pressurizing tank 421, a hot-pressing push rod 422, a hot-pressing push piston 423, a liquid ball 424, a base 425 and a connecting plate 426, the hot-pressing push rod 422 is embedded in the pressurizing tank 421, the bottom end of the hot-pressing push rod 422 is fixedly connected with the upper surface of the hot-pressing push piston 423, the lower surface of the hot-pressing push piston 423 is attached to the upper surface of the liquid ball 424, the lower surface of the pressurizing tank 421 is fixedly connected with the upper surface of the base 425 in a welding mode, and the pressurizing tank 421 is embedded in the connecting plate 426.
The liquid ball 424 comprises a ball 4241, a separation cavity 4242, a spherical center chamber 4243 and a liquid discharge pipe 4244, the separation cavity 4242 is arranged inside the ball 4241 and is of an integrated structure, the spherical center chamber 4243 is arranged inside the separation cavity 4242, and the outer surface of the spherical center chamber 4243 is connected with the head end of the liquid discharge pipe 4244.
The hot gas circulation ring 43 comprises a central shaft 431, a rotary blade 432, a protective shell 433 and circulation holes 434, wherein the central shaft 431 is nested with the center of the rotary blade 432, the tail end of the central shaft 431 is fixedly connected with the inner surface of the protective shell 433 in a welding mode, and the circulation holes 434 are arranged on two sides of the protective shell 433 and are of an integrated structure.
The rotary paddle 432 comprises a rotary shaft sleeve 4321, a spring paddle 4322 and a centrifugal ball 4323, the spring paddle 4322 is arranged on the outer surface of the rotary shaft sleeve 4321, and the tail end of the spring paddle 4322 is connected with the centrifugal ball 4323 by welding.
The auxiliary adjusting plate 413 is nested in the radial adjusting arc plate 412, when the diameter of the adjusting clearance adjusting mechanism 4 is expanded outwards by the radial adjusting arc plate 412, gaps are formed due to expansion of the radial adjusting arc plate 412, and the gaps are filled up by extending out of the auxiliary adjusting plate 413 nested in the radial adjusting arc plate 412, so that the rolling balls are more stable when rolling on the surface of the rolling balls.
The liquid ball 424 is provided with a plurality of partitioned cavities 4242, liquid in the ball center chamber 4243 is filled into the partitioned cavities 4242 when being heated and expanded by utilizing the partitioned cavities 4242, the sphere 4241 of the liquid ball 424 is accelerated to expand through the accelerated heating and expansion of the partitioned cavities 4242, and the hot-pressing pushing piston 423 is pushed to assist in adjusting the bearing play more quickly.
The inside space of pressure boost jar 421 is equipped with liquid ball 424, and when pressure boost jar 421 inside air received the heat influence that the high-speed rotation of bearing produced, inside air intensification inflation is heated liquid ball 424 simultaneously, makes its inflation promote hot pressing promotion piston 423 together, and inflation air cooperation inflation liquid ball 424 is two liang helped mutually and is promoted more power, and is also more stable, makes it have certain support nature in order to expand the diameter of radial regulation circle 41 to reduce the play size of bearing.
The rotary paddle 432 is composed of a spring paddle 4322 and a centrifugal ball 4323, so that when the hot air circulation ring 43 rotates, the rotary paddle 432 is driven to rotate, the centrifugal ball 4323 pulls the spring paddle 4322 to expand outwards under the dragging of the rotating centrifugal force, the diameter of the rotary paddle 432 is increased, and the wind power can be adjusted along with the rotating speed of the hot air circulation ring 43, so that a proper air flow is emitted from the circulation hole 434 to circulate air inside the bearing under a proper condition, the over-high temperature inside the bearing is reduced, and the service life of other structures is prevented from being influenced by high temperature.
The working principle is as follows: when the large-scale bearing starts to operate, the balls 3 rub the bearing outer ring 1 and the play adjusting mechanism 4, high temperature is generated in the bearing, the high temperature affects air and liquid balls 424 in the pressurizing tank 421, the air and liquid balls 424 expand to provide supporting force for the hot-pressing pushing piston 423 and push the hot-pressing pushing piston 423 open by using the principle of thermal expansion and cold contraction, the hot-pressing pushing piston 423 pushes the hot-pressing pushing rod 422, the transmission rod 411 on the hot-pressing pushing rod 422 pushes the radial adjusting arc plate 412 on the radial adjusting ring 41 to expand outwards, the auxiliary adjusting plate 413 nested inside extends out to form a round shape, the rolling balls 3 are attached under the support of the hot air and the expanded liquid balls 424, the radial play between the bearing outer ring 1 and the balls 3 and the play adjusting mechanism 4 is eliminated, and the noise generated when the temperature shock rises and bounces are generated due to the bouncing friction of the balls 3 in the play is reduced, thereby improving the rolling fatigue life of the bearing.
Has the advantages that: when the large-sized bearing rotates at a high speed, high temperature is generated by internal friction, high-temperature air is filled in the hot-pressing auxiliary adjusting device 42, the air in the pressurizing tank 421 is heated and expanded to match with the enlarged liquid ball 424 to push the hot-pressing pushing piston 423, the transmission rod 411 in transmission connection with the hot-pressing pushing piston 423 pulls the radial adjusting arc plate 412 of the radial adjusting ring 41 to expand and match with the auxiliary adjusting plate 413 outwards to form a larger-diameter clearance adjusting mechanism 4, the side surface of the enlarged clearance adjusting mechanism 4 is tightly attached to the surface of the ball 3, the radial clearance in the large-sized bearing is eliminated, the temperature rise of the large-sized bearing during operation is relieved, the noise is reduced, and meanwhile, the vibration in the bearing is relieved to prolong the service life of the rolling fatigue of the.
The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims appended hereto.
Claims (5)
1. The utility model provides a large-scale bearing radial play automatically regulated mechanism which the structure includes: bearing inner race (1), dust cover (2), ball (3), play adjustment mechanism (4), bearing inner race (5), its characterized in that: the inner side surface of the bearing outer ring (1) is provided with a dustproof shell (2) and is coaxial with the dustproof shell, the inner surface of the bearing outer ring (1) is embedded with balls (3), the lower surface of each ball (3) is attached to the outer surface of the play adjusting mechanism (4), and the inner surface of the play adjusting mechanism (4) is embedded with a bearing inner ring (5);
the clearance adjusting mechanism (4) comprises a radial adjusting ring (41), a hot-pressing auxiliary adjusting device (42) and a hot-air circulation ring (43), the inner surface of the radial adjusting ring (41) is in transmission connection with the outer surface of the hot-pressing auxiliary adjusting device (42), and the hot-air circulation ring (43) is arranged on the inner surface of the hot-pressing auxiliary adjusting device (42) and is coaxial with the hot-air circulation ring;
the hot-pressing auxiliary adjusting device (42) comprises a pressurizing tank (421), a hot-pressing push rod (422), a hot-pressing push piston (423), a liquid ball (424), a base (425) and a connecting plate (426), wherein the hot-pressing push rod (422) is embedded in the pressurizing tank (421), the bottom end of the hot-pressing push rod (422) is fixedly connected with the upper surface of the hot-pressing push piston (423), the lower surface of the hot-pressing push piston (423) is attached to the upper surface of the liquid ball (424), the lower surface of the pressurizing tank (421) is fixedly connected with the upper surface of the base (425) in a welding mode, and the pressurizing tank (421) is embedded in the connecting plate (426).
2. The automatic radial play adjusting mechanism for the large bearing according to claim 1, wherein: radial regulation circle (41) are including transfer line (411), radial regulation arc board (412), supplementary regulating plate (413), gangbar (414), the top of transfer line (411) and the lower surface hinged joint of radial regulation arc board (412), supplementary regulating plate (413) are installed in the inside embedding of radial regulation arc board (412), the upper surface of radial regulation arc board (412) is connected with the lower extreme transmission of gangbar (414).
3. The automatic radial play adjusting mechanism for the large bearing according to claim 1, wherein: the liquid ball (424) comprises a ball body (4241), a separation cavity (4242), a ball center chamber (4243) and a liquid discharge pipe (4244), the separation cavity (4242) is arranged inside the ball body (4241) and is of an integrated structure, the ball center chamber (4243) is arranged inside the separation cavity (4242), and the outer surface of the ball center chamber (4243) is connected with the head end of the liquid discharge pipe (4244).
4. The automatic radial play adjusting mechanism for the large bearing according to claim 1, wherein: the hot gas circulation ring (43) comprises a central shaft (431), a rotary blade (432), a protective shell (433) and circulation holes (434), wherein the central shaft (431) is embedded and sleeved with the center of the rotary blade (432), the tail end of the central shaft (431) is fixedly connected with the inner surface of the protective shell (433) in a welding mode, and the two sides of the protective shell (433) are provided with the circulation holes (434) and are of an integrated structure.
5. The automatic radial play adjusting mechanism for the large bearing according to claim 4, wherein: the rotary paddle (432) comprises a rotary shaft sleeve (4321), a spring paddle (4322) and a centrifugal ball (4323), the spring paddle (4322) is arranged on the outer surface of the rotary shaft sleeve (4321), and the tail end of the spring paddle (4322) is connected with the centrifugal ball (4323) in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811274812.XA CN109595258B (en) | 2018-10-30 | 2018-10-30 | Automatic radial clearance adjusting mechanism for large bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811274812.XA CN109595258B (en) | 2018-10-30 | 2018-10-30 | Automatic radial clearance adjusting mechanism for large bearing |
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| CN109595258A CN109595258A (en) | 2019-04-09 |
| CN109595258B true CN109595258B (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811274812.XA Active CN109595258B (en) | 2018-10-30 | 2018-10-30 | Automatic radial clearance adjusting mechanism for large bearing |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878506B (en) * | 2020-07-29 | 2021-06-08 | 苏州讯如电子科技有限公司 | End compensation rolling bearing with inner ring, outer ring and ball clearance self-adaptively eliminated |
| CN114427566B (en) * | 2022-01-14 | 2024-02-06 | 北京轩宇智能科技有限公司 | Rolling bearing and rotating device |
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| JP2006105259A (en) * | 2004-10-05 | 2006-04-20 | Nsk Ltd | Rolling bearing |
| CN201739347U (en) * | 2010-06-07 | 2011-02-09 | 舍弗勒投资(中国)有限公司 | Rolling bearing |
| CN105570291A (en) * | 2016-03-14 | 2016-05-11 | 江苏理工学院 | Rolling type protective bearing device capable of eliminating radial clearance between inner ring and outer ring of rolling bearing automatically |
| CN205489922U (en) * | 2015-12-30 | 2016-08-17 | 山东华普电机科技有限公司 | Air compressor machine motor special bearing rotates and protection device |
| WO2017082249A1 (en) * | 2015-11-09 | 2017-05-18 | Ntn株式会社 | Rolling bearing for extremely low-temperature environment |
| CN107228126A (en) * | 2017-06-23 | 2017-10-03 | 苏州顺革智能科技有限公司 | A kind of rolling bearing in adjust automatically steel ball gap |
| CN207246240U (en) * | 2017-04-01 | 2018-04-17 | 慈溪超凡轴承科技有限公司 | It is a kind of to be easy to sized bearing |
| CN207333449U (en) * | 2017-09-08 | 2018-05-08 | 德尔玛轴承有限公司 | A kind of automatic aligning biserial deep groove ball bearing |
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2018
- 2018-10-30 CN CN201811274812.XA patent/CN109595258B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006105259A (en) * | 2004-10-05 | 2006-04-20 | Nsk Ltd | Rolling bearing |
| CN201739347U (en) * | 2010-06-07 | 2011-02-09 | 舍弗勒投资(中国)有限公司 | Rolling bearing |
| WO2017082249A1 (en) * | 2015-11-09 | 2017-05-18 | Ntn株式会社 | Rolling bearing for extremely low-temperature environment |
| CN205489922U (en) * | 2015-12-30 | 2016-08-17 | 山东华普电机科技有限公司 | Air compressor machine motor special bearing rotates and protection device |
| CN105570291A (en) * | 2016-03-14 | 2016-05-11 | 江苏理工学院 | Rolling type protective bearing device capable of eliminating radial clearance between inner ring and outer ring of rolling bearing automatically |
| CN207246240U (en) * | 2017-04-01 | 2018-04-17 | 慈溪超凡轴承科技有限公司 | It is a kind of to be easy to sized bearing |
| CN107228126A (en) * | 2017-06-23 | 2017-10-03 | 苏州顺革智能科技有限公司 | A kind of rolling bearing in adjust automatically steel ball gap |
| CN207333449U (en) * | 2017-09-08 | 2018-05-08 | 德尔玛轴承有限公司 | A kind of automatic aligning biserial deep groove ball bearing |
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| CN109595258A (en) | 2019-04-09 |
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Effective date of registration: 20201027 Address after: 318050 No.32, West Village Office, fengjiang street, Luqiao District, Taizhou City, Zhejiang Province Applicant after: Taizhou Zhesheng Bearing Technology Co.,Ltd. Address before: No. 39 Ximeihu East Lane, Nanan City, Quanzhou City, Fujian Province Applicant before: NAN'AN RUIFANG MACHINERY TECHNOLOGY Co.,Ltd. |
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Application publication date: 20190409 Assignee: Taizhou Long Da Science and Technology Ltd. s Assignor: Taizhou Zhesheng Bearing Technology Co.,Ltd. Contract record no.: X2021330000127 Denomination of invention: An automatic adjusting mechanism for radial clearance of large bearing Granted publication date: 20201113 License type: Common License Record date: 20210824 |
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