CN109304646A - A kind of circular cutter gear grinding machines - Google Patents
A kind of circular cutter gear grinding machines Download PDFInfo
- Publication number
- CN109304646A CN109304646A CN201811360877.6A CN201811360877A CN109304646A CN 109304646 A CN109304646 A CN 109304646A CN 201811360877 A CN201811360877 A CN 201811360877A CN 109304646 A CN109304646 A CN 109304646A
- Authority
- CN
- China
- Prior art keywords
- circular cutter
- plug
- hole
- grinding machines
- grip block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 10
- 125000003003 spiro group Chemical group 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 9
- 238000004378 air conditioning Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/60—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
Abstract
The present invention discloses a kind of circular cutter gear grinding machines, including the surface grinding machine for carrying out mill processing, further includes: circular cutter clamper, for the fixed circular cutter of clamping, the circular cutter clamper is located at below the grinding wheel of surface grinding machine；Rotating device, for driving the rotation of circular cutter clamper to realize the tooth Profile Machining of circular cutter outer peripheral surface, the circular cutter clamper is connected to the output end of rotating device；Angle demodulator, for adjusting the tilt angle of circular cutter to process the profile angle of respective angles, the rotating device is installed on angle demodulator.A kind of circular cutter gear grinding machines cooperate servo dividing head, circular cutter clamper, angle demodulator by surface grinding machine to realize that the mill of circular cutter is processed, and then greatly reduce cost, and have the characteristics that easy to process, machining accuracy is high.
Description
Technical field
The present invention relates to a kind of gear grinding machines more particularly to a kind of circular cutter gear grinding machines.
Background technique
Air conditioning for automobiles fin is the cooling fin that heat exchange is used in air conditioning for automobiles, is the important composition portion of air conditioning for automobiles
Point, which determine the heat dissipation performances of air conditioning for automobiles.Air conditioning for automobiles fin die is for producing the high-accuracy of air conditioning for automobiles fin
Mold, existing air conditioning for automobiles fin die carries out rolling cut using ring cutting mechanism, to reduce the generation of burr.Circular cutter is girdling machine
The core part of structure, circular cutter need to carry out roll flute processing, the circular cutter used in existing ring cutting mechanism during processing
Thickness is between 0.5mm-1.5mm, and since circular cutter is relatively thin, processing is more difficult, and since the tooth form of circular cutter has centainly
Angle, further increase mill difficulty of processing, mill processing can not be carried out using common surface grinding machine, and according to it is complete from
Dynamicization gear grinding machines, cost is more high, is badly in need of solving as a result,.
Summary of the invention
It is an object of the invention in view of the above-mentioned problems, a kind of circular cutter gear grinding machines are provided, to solve existing ring cutting mechanism
In circular cutter it is relatively thin, the tooth form of circular cutter has certain angle, the problem of being difficult to carry out mill processing using common surface grinding machine.
The purpose of the present invention is be achieved through the following technical solutions:
A kind of circular cutter gear grinding machines, including the surface grinding machine for carrying out mill processing, further includes:
Circular cutter clamper, for the fixed circular cutter of clamping, the circular cutter clamper is located under the grinding wheel of surface grinding machine
Side；
Rotating device, for driving the rotation of circular cutter clamper to realize the tooth Profile Machining of circular cutter outer peripheral surface, the ring
Cutter holders are connected to the output end of rotating device；
Angle demodulator, for adjusting the tilt angle of circular cutter to process the profile angle of respective angles, the rotation
Device is installed on angle demodulator.
As a preferred solution of the present invention, the circular cutter clamper includes retaining sleeve, grip block, the retaining sleeve
It is fixedly connected with grip block, and retaining sleeve is arranged concentrically with grip block, is arranged concentrically and plays the role of positioning on the grip block
The aperture of boss portion, the outer diameter and circular cutter inner hole of the boss portion matches, along grip block axial direction on the grip block
It is provided with first through hole, the position that first through hole is corresponded on the retaining sleeve is provided with locking screw pit, is equipped on the grip block
For circular cutter to be pressed in the pressing plate on grip block, the position that first through hole is corresponded on the pressing plate is provided with the second through-hole, lock
It is screwed into locking screw pit after the second through-hole of tight screw bolt passes, first through hole.
As a preferred solution of the present invention, it is provided at least two location hole on the circular cutter, it is right on the grip block
Positioning spiro pit should be offered, shop bolt is screwed into positioning spiro pit after passing through location hole.
As a preferred solution of the present invention, the groove matched with boss portion is provided on the pressing plate.
As a preferred solution of the present invention, it is provided with locating notch on the retaining sleeve, is provided on the grip block
The positioning protrusion matched with locating notch.
As a preferred solution of the present invention, the angle demodulator includes pedestal, is used to support consolidating for rotating device
The outer diameter of fixed board, reference block, slip gauge, the first plug and the second plug, second plug is identical as the outer diameter of the first plug, institute
State the first end for being connected to pedestal that the first plug is able to rotate, the reference block is installed on the second end of pedestal, reference block it is upper
End face is plane, and the upper surface of reference block and the center of circle of the first plug are located in same horizontal line, what the slip gauge can be moved away from
It is set on the upper surface of reference block, the first end of the fixed plate lower end surface is fixedly connected with the first plug, and under fixed plate
The second end of end face is fixedly connected with the second plug, and second plug is supported by the slip gauge being disposed below.
The adjusting of different angle can be realized by replacing various sizes of slip gauge in a kind of above-mentioned angle demodulator, specifically
, slip gauge height D can be as obtained by trigonometric function calculating, and formula is as follows:
D=B × SinA-C/2
Wherein, the C: the second diameter of mandrel；A: required adjusting angle, the i.e. angle of fixed plate and horizontal plane；B: the first plug
Center between the second plug away from.
As a preferred solution of the present invention, the lower end surface of the fixed plate is provided with the V-arrangement for positioning the first plug
Slot, and the lower end surface of fixed plate is provided with the V-shaped groove for positioning the second plug.
As a preferred solution of the present invention, the locking piece for locking the first plug is provided on the pedestal.
As a preferred solution of the present invention, the locking piece is bolt, is provided with use in the horizontal direction on the pedestal
In the rotation hole of the first plug of installation, and locking screw thread hole is provided on pedestal along the vertical direction, the lower end in the locking screw thread hole
It is connected with rotation hole, the locking piece is screwed in locking screw thread hole and extending downwardly into rotation hole to act against the first plug
On.
As a preferred solution of the present invention, the rotating device is servo dividing head.
Beneficial effects of the present invention are, a kind of circular cutter gear grinding machines pass through surface grinding machine and cooperate servo dividing head, ring
Cutter holders, angle demodulator realize the mill processing of circular cutter, and then greatly reduce cost, and have it is easy to process,
The high feature of machining accuracy.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of circular cutter gear grinding machines；
Fig. 2 is the structural schematic diagram of circular cutter clamper；
Fig. 3 is the grip block structural schematic diagram of circular cutter clamper；
Fig. 4 is the structural schematic diagram of angle demodulator；
Fig. 5 is the fixed plate structure schematic diagram of angle demodulator.
In figure:
1, circular cutter clamper；11, retaining sleeve；12, grip block；121, first through hole；122, positioning protrusion；123, boss
Portion；13, pressing plate；14, clamping screw；15, shop bolt；
2, rotating device；
3, angle demodulator；31, pedestal；32, fixed plate；321, V-shaped groove；33, reference block；34, slip gauge；35, the first core
Stick；36, the second plug.
4, grinding wheel；
5, circular cutter.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.It is understood that
It is that embodiment described herein is used only for explaining the present invention rather than limiting the invention.
It please refers to shown in Fig. 1 to Fig. 5, Fig. 1 is a kind of structural schematic diagram of circular cutter gear grinding machines；Fig. 2 is circular cutter clamping
The structural schematic diagram of device；Fig. 3 is the grip block structural schematic diagram of circular cutter clamper；Fig. 4 is the structural representation of angle demodulator
Figure；Fig. 5 is the fixed plate structure schematic diagram of angle demodulator.
In this present embodiment, a kind of circular cutter gear grinding machines, including the surface grinding machine for carrying out mill processing, further includes:
Circular cutter clamper 1, for the fixed circular cutter 5 of clamping, the circular cutter clamper 1 is located at the grinding wheel of surface grinding machine
4 lower sections；
Rotating device 2, it is described for driving the rotation of circular cutter clamper 1 to realize the tooth Profile Machining of 5 outer peripheral surface of circular cutter
Circular cutter clamper 1 is connected to the output end of rotating device 2；
Angle demodulator 3, for adjusting the tilt angle of circular cutter 5 to process the profile angle of respective angles, the rotation
Rotary device 2 is installed on angle demodulator 3.
In the present embodiment, circular cutter clamper 1 include retaining sleeve 11, grip block 12, the retaining sleeve 11 by bolt with
Grip block 12 is fixedly connected, and retaining sleeve 11 is arranged concentrically with grip block 12, for the ease of installing and guaranteeing concentricity, retaining sleeve
It is provided with locating notch on 11, the positioning protrusion matched with locating notch, the grip block 12 are provided on the grip block 12
On be arranged concentrically the boss portion 123 to play the role of positioning, the aperture phase of the outer diameter and 5 inner hole of circular cutter of the boss portion 123
Match, is provided with first through hole 121 along 12 axial direction of grip block on the grip block 12, corresponds to first through hole on the retaining sleeve 11
121 position is provided with locking screw pit, and the pressure for being pressed in circular cutter 5 on grip block 12 is equipped on the grip block 12
Plate 13 is provided with the groove matched with boss portion 123 on the pressing plate 13, and corresponds to the position of first through hole 121 on pressing plate 13
It is provided with the second through-hole, clamping screw 14 is screwed into locking screw pit after sequentially passing through the second through-hole, first through hole 121, the ring
It is provided with 2 location holes on cutter 5, is corresponded on the grip block 12 and offers positioning spiro pit, shop bolt 15 passes through location hole
After be screwed into positioning spiro pit.
In the present embodiment, angle demodulator 3 includes pedestal 31, the fixed plate 32 for being used to support rotating device 2, reference block
33, slip gauge 34, the first plug 35 and the second plug 36, second plug 36 is identical as 35 structure of the first plug, and the second core
The outer diameter of stick 36 is identical as the outer diameter of the first plug 35, the first end for being connected to pedestal 31 that first plug 35 is able to rotate
(i.e. right end in Fig. 4), the reference block 33 are installed on the second end (i.e. left end in Fig. 4) of pedestal 31, reference block 33 it is upper
End face is plane, and the upper surface of reference block 33 and the center of circle of the first plug 35 are located in same horizontal line, 34 energy of slip gauge
What is be moved away from is set on the upper surface of reference block 33, and the first end (i.e. right end in Fig. 4) of 32 lower end surface of fixed plate is provided with
String configuration is fixedly connected for positioning the V-shaped groove of the first plug 35, and by bolt with the first plug 35, and fixed plate
The second end (i.e. left end in Fig. 4) of 32 lower end surfaces be provided with string configuration for positioning the V-shaped groove of the second plug 36, and lead to
It crosses bolt to be fixedly connected with the second plug 36, second plug 36 is supported by the slip gauge 34 being disposed below.
The first plug 35 rotates after in order to avoid angle adjustment, in the present embodiment, is provided on pedestal 31 for locking
The locking piece (not being painted in figure) of fixed first plug 35, the locking piece are bolt, are provided in the horizontal direction on the pedestal 31
For installing the rotation hole of the first plug 35, and locking screw thread hole is provided on pedestal 31 along the vertical direction, the locking screw thread hole
Lower end be connected with rotation hole, the locking piece is screwed in locking screw thread hole and extending downwardly into rotation hole to act against first
On plug 35.
In the present embodiment, by the fixed circular cutter 5 of 1 clamping of circular cutter clamper, gives circular cutter 5 certain support, keep away
Exempt from it to be deformed, shake in process；When specific installation, circular cutter 5 is set in the boss portion 123 of grip block 12
On, it is then positioned by shop bolt 15, then circular cutter 5 is fixed on grip block 12 by pressing plate 13, Jin Erneng
The effectively reliable fixed circular cutter 5 of clamping.
In the present embodiment, rotating device 2 is servo dividing head, rotating device 2 with circular cutter clamper 1 is concentric connect, tool
Body, multiple mounting holes are along the circumferential direction offered on the retaining sleeve 11 of circular cutter clamper 1, retaining sleeve 11 passes through bolt and rotation
The output end of rotary device 2 is connected, and in order to guarantee concentricity, concentric protrusion, the output of rotating device 2 are provided on retaining sleeve 11
End is provided with the concentric notch to match with concentric protrusion, passes through above-mentioned connection, 2 energy band rotating ring cutter holders 1 of rotating device
Rotation, to realize the mill processing of tooth form on 5 outer peripheral surface of circular cutter.
In the present embodiment, the tilt angle of circular cutter 5 is adjusted by angle demodulator 3, specifically when adjustment, unclamps locking
Part removes original slip gauge 34, calculates 34 height of slip gauge according to required goniometer, and the slip gauge 34 for choosing corresponding height is placed in base
It is that axis rotates fixed plate 32 with the first plug 35, so that the second plug 36 and reference block 33 of 32 lower end of fixed plate on quasi- block 33
Upper surface contradicts, and then, locking piece is tightened, that is, completes to adjust work, convenient and simple for operation.
The above embodiments only describe the basic principles and characteristics of the invention, and the present invention is not limited by above-described embodiment,
Without departing from the spirit and scope of the present invention, the invention also has various changes and changes, and these changes and changes are all fallen
Enter in scope of the claimed invention.The claimed scope of the invention is defined by the following claims.
Claims (10)
1. a kind of circular cutter gear grinding machines, including the surface grinding machine for carrying out mill processing, it is characterised in that: further include:
Circular cutter clamper, for the fixed circular cutter of clamping, the circular cutter clamper is located at below the grinding wheel of surface grinding machine；
Rotating device, for driving the rotation of circular cutter clamper to realize the tooth Profile Machining of circular cutter outer peripheral surface, the circular cutter
Clamper is connected to the output end of rotating device；
Angle demodulator, for adjusting the tilt angle of circular cutter to process the profile angle of respective angles, the rotating device
It is installed on angle demodulator.
2. a kind of circular cutter gear grinding machines according to claim 1, it is characterised in that: the circular cutter clamper includes clamping
Set, grip block, the retaining sleeve is fixedly connected with grip block, and retaining sleeve is arranged concentrically with grip block, same on the grip block
The heart is provided with the boss portion to play the role of positioning, and the aperture of the outer diameter and circular cutter inner hole of the boss portion matches, the clamping
It is provided with first through hole along grip block axial direction on plate, the position that first through hole is corresponded on the retaining sleeve is provided with locking screw
Hole is equipped with the pressing plate for being pressed in circular cutter on grip block on the grip block, corresponds to first through hole on the pressing plate
Position be provided with the second through-hole, clamping screw is screwed into locking screw pit after sequentially passing through the second through-hole, first through hole.
3. a kind of circular cutter gear grinding machines according to claim 2, it is characterised in that: be provided at least two on the circular cutter
Location hole, corresponding on the grip block to offer positioning spiro pit, shop bolt is screwed into positioning spiro pit after passing through location hole.
4. a kind of circular cutter gear grinding machines according to claim 3, it is characterised in that: be provided on the pressing plate and boss portion phase
The groove of cooperation.
5. a kind of circular cutter gear grinding machines according to claim 4, it is characterised in that: be provided with locating slot on the retaining sleeve
Mouthful, the positioning protrusion matched with locating notch is provided on the grip block.
6. a kind of circular cutter gear grinding machines according to any one of claims 1 to 5, it is characterised in that: the angle demodulator
Including pedestal, the fixed plate for being used to support rotating device, reference block, slip gauge, the first plug and the second plug, second plug
Outer diameter it is identical as the outer diameter of the first plug, the first end for being connected to pedestal that first plug is able to rotate, the reference block
It is installed on the second end of pedestal, the upper surface of reference block is plane, and the upper surface of reference block and the center of circle of the first plug are located at
In same horizontal line, what the slip gauge can be moved away from is set on the upper surface of reference block, the first end of the fixed plate lower end surface
It is fixedly connected with the first plug, and the second end of fixed plate lower end surface is fixedly connected with the second plug, second plug is by position
In slip gauge support below.
7. a kind of circular cutter gear grinding machines according to claim 6, it is characterised in that: the lower end surface of the fixed plate is provided with use
In the V-shaped groove for positioning the first plug, and the lower end surface of fixed plate is provided with the V-shaped groove for positioning the second plug.
8. a kind of circular cutter gear grinding machines according to claim 7, it is characterised in that: be provided on the pedestal for locking
The locking piece of first plug.
9. a kind of circular cutter gear grinding machines according to claim 8, it is characterised in that: the locking piece is bolt, the bottom
The rotation hole for installing the first plug is provided on seat in the horizontal direction, and is provided with locking screw thread hole on pedestal along the vertical direction,
The lower end in the locking screw thread hole is connected with rotation hole, and the locking piece is screwed in locking screw thread hole and extending downwardly into rotation
Hole is to act against on the first plug.
10. a kind of circular cutter gear grinding machines described according to claim 1 or 2 or 3 or 4 or 5 or 7 or 8 or 9, it is characterised in that: institute
Stating rotating device is servo dividing head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360877.6A CN109304646A (en) | 2018-11-15 | 2018-11-15 | A kind of circular cutter gear grinding machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360877.6A CN109304646A (en) | 2018-11-15 | 2018-11-15 | A kind of circular cutter gear grinding machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109304646A true CN109304646A (en) | 2019-02-05 |
Family
ID=65223123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811360877.6A Pending CN109304646A (en) | 2018-11-15 | 2018-11-15 | A kind of circular cutter gear grinding machines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109304646A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798871A (en) * | 2020-06-16 | 2021-12-17 | 富鼎电子科技(嘉善)有限公司 | Bearing device |
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|---|---|---|---|---|
| JP2005103749A (en) * | 2003-09-27 | 2005-04-21 | Gleason Corp | Method and apparatus for grinding tooth flank of round type shaving cutter |
| US20070167121A1 (en) * | 2003-12-01 | 2007-07-19 | Drago Cendak | Device for sharpening chain saw teeth |
| CN102335843A (en) * | 2011-10-10 | 2012-02-01 | 重庆工具厂有限责任公司 | Tool fixture for machining addendum arc of slotting cutter |
| CN102357822A (en) * | 2011-10-20 | 2012-02-22 | 无锡海特精密模具有限公司 | Jig for processing automobile air conditioning die circular cutter |
| CN202622485U (en) * | 2012-06-21 | 2012-12-26 | 重庆工具厂有限责任公司 | Edge-grinding gear shaper cutter rake face clamping device on surface grinding machine |
| CN206519760U (en) * | 2017-02-21 | 2017-09-26 | 中航动力株洲航空零部件制造有限公司 | Annular thin wall part clamp for machining |
| CN206709808U (en) * | 2017-03-23 | 2017-12-05 | 人本集团有限公司 | Tapered roller bearing ring convexity detection positioner |
| CN206795115U (en) * | 2017-04-26 | 2017-12-26 | 苏州市艾西依钣金制造有限公司 | A kind of welding positioning tool of adjustable multiple angles |
| CN108555709A (en) * | 2018-06-19 | 2018-09-21 | 滨州渤海活塞有限公司 | Piston ellipsoid pin hole processing unit (plant) and method |
| CN209273089U (en) * | 2018-11-15 | 2019-08-20 | 无锡海特精密模具有限公司 | A kind of circular cutter gear grinding machines |
-
2018
- 2018-11-15 CN CN201811360877.6A patent/CN109304646A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005103749A (en) * | 2003-09-27 | 2005-04-21 | Gleason Corp | Method and apparatus for grinding tooth flank of round type shaving cutter |
| US20070167121A1 (en) * | 2003-12-01 | 2007-07-19 | Drago Cendak | Device for sharpening chain saw teeth |
| CN102335843A (en) * | 2011-10-10 | 2012-02-01 | 重庆工具厂有限责任公司 | Tool fixture for machining addendum arc of slotting cutter |
| CN102357822A (en) * | 2011-10-20 | 2012-02-22 | 无锡海特精密模具有限公司 | Jig for processing automobile air conditioning die circular cutter |
| CN202622485U (en) * | 2012-06-21 | 2012-12-26 | 重庆工具厂有限责任公司 | Edge-grinding gear shaper cutter rake face clamping device on surface grinding machine |
| CN206519760U (en) * | 2017-02-21 | 2017-09-26 | 中航动力株洲航空零部件制造有限公司 | Annular thin wall part clamp for machining |
| CN206709808U (en) * | 2017-03-23 | 2017-12-05 | 人本集团有限公司 | Tapered roller bearing ring convexity detection positioner |
| CN206795115U (en) * | 2017-04-26 | 2017-12-26 | 苏州市艾西依钣金制造有限公司 | A kind of welding positioning tool of adjustable multiple angles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798871A (en) * | 2020-06-16 | 2021-12-17 | 富鼎电子科技(嘉善)有限公司 | Bearing device |
| CN113798871B (en) * | 2020-06-16 | 2023-02-28 | 富鼎电子科技(嘉善)有限公司 | Bearing device |
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