CN104440323A - Shaft clamping and shifting unit for dual-face milling machines of circular shafts - Google Patents
Shaft clamping and shifting unit for dual-face milling machines of circular shafts Download PDFInfo
- Publication number
- CN104440323A CN104440323A CN201410765643.5A CN201410765643A CN104440323A CN 104440323 A CN104440323 A CN 104440323A CN 201410765643 A CN201410765643 A CN 201410765643A CN 104440323 A CN104440323 A CN 104440323A
- Authority
- CN
- China
- Prior art keywords
- slide unit
- circular shaft
- clamping
- middle slide
- flat board
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
- B23B39/02—Boring machines; Combined horizontal boring and milling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
- B23Q5/402—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw in which screw or nut can both be driven
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
The invention relates to a shaft clamping and shifting unit for dual-face milling machines of circular shafts. The shaft clamping and shifting unit is characterized by comprising clamping mechanisms, a middle sliding table and a driving mechanism; the middle sliding table is used for mounting the clamping mechanisms; the driving mechanism is used for driving the middle sliding table to move. The middle sliding table is mounted on a bed through linear slide rails; two clamping components for clamping circular shafts are mounted at left and right ends of the middle sliding table, respectively; each clamping component comprises a clamping cylinder, a moving fixture and a fixed fixture, the fixed fixture is fixed to the rear of the middle sliding table, the clamping cylinder is disposed along a moving direction of the circular shaft during machining, the clamping cylinder is mounted on a small adjusting plate through a cylinder seat, a piston rod end of the clamping cylinder is provided with the moving fixture, the fixed fixture is disposed opposite to the moving fixture, the fixed fixture is fixed on the small adjusting plate, and the fixed fixture and the moving fixture fit each other to clamp the circular shaft. The shaft clamping and shifting unit is simple in structure, reasonable in design and convenient to operate, allows firm clamping, has a wide range of adjustment, allows precise movement and helps improve boring and milling efficiency and precision of the circular shafts and decrease labor intensity.
Description
Technical field
The present invention relates to the appurtenances on a kind of circular shaft dual-face milling machines, specifically the circular shaft clamping mobile device of circular shaft dual-face milling machines, belongs to machining equipment field.
Background technology
The face miller range of work is large, is applicable to the building up by welding of the metal material such as foundry goods, steel part, is widely used in machinery manufacturing industry.Circular shaft is a kind of conventional component of machine, and its both ends of the surface need to carry out the process of boring and milling deburring usually.In prior art, mostly the milling machine for carrying out boring and milling to circular shaft both ends of the surface is the mode of single end face single process, such processing mode inefficiency, and circular shaft needs clamping twice, complex operation, and easily occurs error, affects boring and milling precision.
For dual-face milling machines, circular shaft needs be jammed fixing and move in tow, to have coordinated boring-mill work with boring and milling device carrying out end face boring-mill work.Just requirement is proposed to circular shaft clamping mobile device here; its design rationality, simple operation, clamping fastener degree and operation accuracy have material impact to circular shaft machining accuracy, if design unreasonable, will be aided with artificial rectification; affect production efficiency, sometimes even need to shut down.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of circular shaft clamping mobile device of circular shaft dual-face milling machines is provided, its structure is simple, reasonable in design, easy to operate, clamping firmly, there is wide adjustable degree, and accurately mobile, be conducive to the boring-mill work efficiency and the machining accuracy that improve circular shaft, reduce labour intensity.
According to technical scheme provided by the invention: the circular shaft of circular shaft dual-face milling machines clamping mobile device, is characterized in that: comprise clamp system, for the driving mechanism installing slide unit in clamp system and divide a word with a hyphen at the end of a line for slide unit in driving; Described middle slide unit is arranged on lathe bed by linear slide rail, and a set of clamp assembly for clamping circular shaft is respectively installed at two ends, middle slide unit left and right; Described clamp assembly comprises clamping cylinder, dynamic fixture and clamp tool, described clamp tool is fixedly mounted on middle slide unit rear portion, the direct of travel that described clamping cylinder adds man-hour along circular shaft is arranged, clamping cylinder is arranged on minor adjustment plate by cylinder seat, dynamic fixture installed by the tailpiece of the piston rod of clamping cylinder, and clamp tool is arranged on dynamic fixture opposite, and clamp tool is fixed on minor adjustment plate, clamp tool coordinates with dynamic fixture, to clamp circular shaft.
As a further improvement on the present invention, the side of described clamp tool top and dynamic fixture vis-a-vis is provided with the V-shaped groove for clasping circular shaft.
As a further improvement on the present invention, described middle slide unit comprises middle slide unit flat board, little guide rail and minor adjustment plate, the dull and stereotyped two ends, left and right of described middle slide unit are respectively provided with the little guide rail that two horizontal cross are arranged, above the dull and stereotyped two ends, left and right of middle slide unit, a minor adjustment plate is set respectively, described minor adjustment plate and little guide rail form slide-and-guide and coordinate, a set of clamp assembly installed by every part minor adjustment plate, and minor adjustment plate and middle slide unit flat board are bolted fixing.
As a further improvement on the present invention, described minor adjustment plate is provided with two microscler bolt mounting holes be parallel to each other, and described middle slide unit flat board is provided with the multiple circular bolt mounting holes lining up two rows.
As a further improvement on the present invention, described circular shaft clamp system also comprises buffer stopper, and described buffer stopper has two pieces, and two pieces buffer stopper is arranged on the two, left and right near circular shaft feed entrance point side on middle slide unit flat board respectively, and buffer stopper upper surface is set to inclined-plane.
As a further improvement on the present invention, described driving mechanism of dividing a word with a hyphen at the end of a line comprises motor reducer and feed screw nut pair, described motor reducer is fixedly mounted on lathe bed by electric machine support, described feed screw nut pair is arranged on the below in the middle part of middle slide unit flat board, screw mandrel in feed screw nut pair is directly connected with the output shaft of motor reducer, and the nut in feed screw nut pair is fixedly connected with middle slide unit flat plate bottom.
As a further improvement on the present invention, the dull and stereotyped installed in front of described middle slide unit has middle slide unit front shroud, and the outside of described minor adjustment plate is provided with middle slide unit side cover, is provided with middle slide unit back cover on rear side of described middle slide unit flat board.
compared with prior art, tool has the following advantages in the present invention:structure of the present invention is simple, reasonable in design, easy to operate, and clamping firmly, has wide adjustable degree, and accurately mobile, is conducive to the boring-mill work efficiency and the machining accuracy that improve circular shaft, reduces labour intensity.
Accompanying drawing explanation
Fig. 1 is the perspective view of the embodiment of the present invention.
Fig. 2 is the structure top view of the embodiment of the present invention.
Fig. 3 is the perspective view after Fig. 1 removes clamp system and protective cover.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in the figure, the circular shaft clamping mobile device of the circular shaft dual-face milling machines in embodiment mainly comprises clamp system, for the driving mechanism major part of installing slide unit in clamp system and divide a word with a hyphen at the end of a line for slide unit in driving.
As shown in Fig. 1 ~ Fig. 3, described middle slide unit is arranged on lathe bed 1 by linear slide rail 14, and a set of clamp assembly for clamping circular shaft A is respectively installed at two ends, middle slide unit left and right; Described clamp assembly forms primarily of clamping cylinder 8, dynamic fixture 12 and clamp tool 11, described clamp tool 11 is fixedly mounted on middle slide unit rear portion, the direct of travel that described clamping cylinder 8 adds man-hour along circular shaft A is arranged, clamping cylinder 8 is arranged on minor adjustment plate 4 by cylinder seat 9, dynamic fixture 12 installed by the tailpiece of the piston rod of clamping cylinder 8, and clamp tool 11 is arranged on dynamic fixture 12 opposite, and clamp tool 11 is fixed on minor adjustment plate 4, clamp tool 11 coordinates with dynamic fixture 12, to clamp circular shaft A.
As shown in Figure 1, fix circular shaft A for clasping better, the side of described clamp tool 11 top and dynamic fixture 12 vis-a-vis is provided with the V-shaped groove for clasping circular shaft A.
As shown in Fig. 1 ~ Fig. 3, in the embodiment of the present invention, described middle slide unit is the form of adjustable in length, it is mainly made up of middle slide unit flat board 2, little guide rail 3 and minor adjustment plate 4, described middle slide unit flat board about 2 two ends are respectively provided with the little guide rail 3 that two horizontal cross are arranged, above middle slide unit flat board about 2 two ends, a minor adjustment plate 4 is set respectively, described minor adjustment plate 4 forms slide-and-guide with little guide rail 3 and coordinates, a set of clamp assembly installed by every part minor adjustment plate 4, and minor adjustment plate 4 and middle slide unit flat board 2 are bolted fixing.The scope of application of the present invention can be widened like this.
As shown in Figure 2, in the embodiment of the present invention, described minor adjustment plate 4 is provided with two microscler bolt mounting holes be parallel to each other, described middle slide unit flat board 2 is provided with the multiple circular bolt mounting holes lining up two rows, like this, also can be connected and fixed easily after minor adjustment plate 4 and dull and stereotyped 2 relative movements of middle slide unit, and can step-less adjustment be realized.
As shown in Figure 1 and Figure 2, in the embodiment of the present invention, described clamp system also comprises buffer stopper 7, and described buffer stopper 7 has two pieces, two pieces buffer stopper 7 is arranged on the two, left and right near circular shaft A feed entrance point side on middle slide unit flat board 2 respectively, and buffer stopper 7 upper surface is set to inclined-plane.Buffer stopper 7 can cushion inertia when circular shaft A enters into clamp system, prevents circular shaft A from occurring the excessive situation of displacement due to inertia, provides convenience to follow-up clamp operation.
As shown in Figure 3, in the embodiment of the present invention, described driving mechanism of dividing a word with a hyphen at the end of a line forms primarily of motor reducer 6 and feed screw nut pair 15, described motor reducer 6 is fixedly mounted on lathe bed 1 by electric machine support, described feed screw nut pair 15 is arranged on the below in the middle part of middle slide unit flat board 2, screw mandrel in feed screw nut pair 15 is directly connected with the output shaft of motor reducer 6, and the nut in feed screw nut pair 15 is fixedly connected with bottom middle slide unit flat board 2.
As shown in Fig. 1 ~ Fig. 3; dull and stereotyped 2 installed in front of described middle slide unit have middle slide unit front shroud 5; the outside of described minor adjustment plate 4 is provided with middle slide unit side cover 12; on rear side of described middle slide unit flat board 2, middle slide unit back cover 13 is installed; described middle slide unit front shroud 5, middle slide unit side cover 12 and middle slide unit back cover 13 are combined into protective cover; there is provided protection to motor reducer 6, feed screw nut pair 15 and linear slide rail 14, thus improve barrier propterty of the present invention, be conducive to extension device service life.
The reaction force operationally born due to boring and milling mechanism is larger, for preventing it from impacting damage to lathe bed 1, padding backing plate 2 is housed between described carriage saddle 3 and lathe bed 1.
As shown in Figure 1 and Figure 2, in the embodiment of the present invention, described boring and milling mechanism is primarily of boring and milling unit head 5, cutter blade 9 and milling cutter blade fixing structure composition, and described boring and milling unit head 5 is fixedly mounted on slide unit 4, and cutter blade 9 is arranged on the clutch end of boring and milling unit head 5 by milling cutter blade fixing structure.Described milling cutter blade fixing structure forms primarily of handle of a knife 11, cutter blade cutterhead 7, cutter blade briquetting 10 and fastening bolt 8, described handle of a knife 11 is fixedly connected on the clutch end of boring and milling unit head 5, cutter blade cutterhead 7 fastening bolt 8 is fixedly mounted on handle of a knife 11 front end face, cutter blade cutterhead 7 front end face is provided with radial groove 7a, described cutter blade 9 is contained in radial groove 7a and is also fixed with cutter blade briquetting 10, cutter blade 9 one side fits tightly with the medial surface of radial groove 7a, and cutter blade 9 another side and cutter blade briquetting 10 fit tightly.
As shown in Figure 2, the clutch end of the boring and milling unit head 5 in the present invention is that hole exports, and be locked by retainer ring 6 in the hole that described handle of a knife 11 rear portion is contained in outputting power, handle of a knife 11 rear portion is set to taper seat.Boring and milling unit head 5 in the present invention can directly obtain in outsourcing, and the model as Taizhou plain Condor machine tool plant can be selected to produce is BT40-1 type boring and milling head outer.Cutter blade 9 in the present invention adopts triangular-shaped blades sheet 9, and cutter blade 9 also can directly outsourcing.
Claims (7)
1. the circular shaft clamping mobile device of circular shaft dual-face milling machines, is characterized in that: comprise clamp system, for the driving mechanism installing slide unit in clamp system and divide a word with a hyphen at the end of a line for slide unit in driving; Described middle slide unit is arranged on lathe bed (1) by linear slide rail (14), and a set of clamp assembly for clamping circular shaft (A) is respectively installed at two ends, middle slide unit left and right; Described clamp assembly comprises clamping cylinder (8), dynamic fixture (12) and clamp tool (11), described clamp tool (11) is fixedly mounted on middle slide unit rear portion, the direct of travel that described clamping cylinder (8) adds man-hour along circular shaft (A) is arranged, clamping cylinder (8) is arranged on minor adjustment plate (4) by cylinder seat (9), dynamic fixture (12) installed by the tailpiece of the piston rod of clamping cylinder (8), clamp tool (11) is arranged on dynamic fixture (12) opposite, clamp tool (11) is fixed on minor adjustment plate (4), clamp tool (11) coordinates with dynamic fixture (12), to clamp circular shaft (A).
2. the circular shaft clamping mobile device of circular shaft dual-face milling machines as claimed in claim 1, is characterized in that: the side of described clamp tool (11) top and dynamic fixture (12) vis-a-vis is provided with the V-shaped groove for clasping circular shaft (A).
3. the circular shaft clamping mobile device of circular shaft dual-face milling machines as claimed in claim 1, it is characterized in that: described middle slide unit comprises middle slide unit flat board (2), little guide rail (3) and minor adjustment plate (4), described middle slide unit flat board (2) two ends, left and right are respectively provided with the little guide rail (3) that two horizontal cross are arranged, in the top at middle slide unit flat board (2) two ends, left and right, a minor adjustment plate (4) is set respectively, described minor adjustment plate (4) forms slide-and-guide with little guide rail (3) and coordinates, every part minor adjustment plate (4) is upper installs a set of clamp assembly, minor adjustment plate (4) and middle slide unit flat board (2) are bolted fixing.
4. the circular shaft clamping mobile device of circular shaft dual-face milling machines as claimed in claim 3, it is characterized in that: described minor adjustment plate (4) is provided with two microscler bolt mounting holes be parallel to each other, described middle slide unit flat board (2) is provided with the multiple circular bolt mounting holes lining up two rows.
5. the circular shaft clamping mobile device of circular shaft dual-face milling machines as claimed in claim 3, it is characterized in that: described circular shaft clamp system also comprises buffer stopper (7), described buffer stopper (7) has two pieces, two pieces buffer stopper (7) is arranged on the upper two, left and right near circular shaft (A) feed entrance point side of middle slide unit flat board (2) respectively, and buffer stopper (7) upper surface is set to inclined-plane.
6. the circular shaft clamping mobile device of circular shaft dual-face milling machines as claimed in claim 3, it is characterized in that: described in driving mechanism of dividing a word with a hyphen at the end of a line comprise motor reducer (6) and feed screw nut pair (15), described motor reducer (6) is fixedly mounted on lathe bed (1) by electric machine support, described feed screw nut pair (15) is arranged on the below at middle slide unit flat board (2) middle part, screw mandrel in feed screw nut pair (15) is directly connected with the output shaft of motor reducer (6), and the nut in feed screw nut pair (15) is fixedly connected with middle slide unit flat board (2) bottom.
7. the circular shaft clamping mobile device of circular shaft dual-face milling machines as claimed in claim 3, it is characterized in that: described middle slide unit flat board (2) installed in front has middle slide unit front shroud (5), the outside of described minor adjustment plate (4) is provided with middle slide unit side cover (12), and described middle slide unit flat board (2) rear side is provided with middle slide unit back cover (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765643.5A CN104440323B (en) | 2014-12-11 | 2014-12-11 | The circular shaft of circular shaft dual-face milling machines clamps mobile device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765643.5A CN104440323B (en) | 2014-12-11 | 2014-12-11 | The circular shaft of circular shaft dual-face milling machines clamps mobile device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104440323A true CN104440323A (en) | 2015-03-25 |
| CN104440323B CN104440323B (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410765643.5A Expired - Fee Related CN104440323B (en) | 2014-12-11 | 2014-12-11 | The circular shaft of circular shaft dual-face milling machines clamps mobile device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104440323B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826705A (en) * | 2016-12-29 | 2017-06-13 | 天津市金万方钢结构有限公司 | Double sliding desk type steel structure operating platforms |
| CN108406392A (en) * | 2018-05-30 | 2018-08-17 | 珠海格力智能装备有限公司 | Centering mechanism |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1546228A1 (en) * | 1987-11-10 | 1990-02-28 | Ровенский Научно-Исследовательский Институт Технологии Машиностроения | Multiple clamp |
| JP2004306256A (en) * | 2004-06-23 | 2004-11-04 | Takeda Kikai:Kk | Stock vice |
| CN200957513Y (en) * | 2006-09-08 | 2007-10-10 | 冯文波 | Multifunctional machine tool |
| CN201316896Y (en) * | 2008-12-25 | 2009-09-30 | 山东济宁特力机床有限公司 | Machine tool with central holes drilled on two end surfaces of digital control motor shaft mill |
| CN101758276A (en) * | 2008-10-13 | 2010-06-30 | 庄添财 | Machine for milling arcs on both ends of top tube |
| US8496238B1 (en) * | 2009-01-26 | 2013-07-30 | T&T Engineering Services, Inc. | Tubular gripping apparatus with locking mechanism |
| CN104175145A (en) * | 2014-08-26 | 2014-12-03 | 无锡柯马机械有限公司 | Machining clamp |
| CN204277590U (en) * | 2014-12-11 | 2015-04-22 | 无锡大龙马数控机床制造有限责任公司 | The circular shaft clamping mobile device of circular shaft dual-face milling machines |
-
2014
- 2014-12-11 CN CN201410765643.5A patent/CN104440323B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1546228A1 (en) * | 1987-11-10 | 1990-02-28 | Ровенский Научно-Исследовательский Институт Технологии Машиностроения | Multiple clamp |
| JP2004306256A (en) * | 2004-06-23 | 2004-11-04 | Takeda Kikai:Kk | Stock vice |
| CN200957513Y (en) * | 2006-09-08 | 2007-10-10 | 冯文波 | Multifunctional machine tool |
| CN101758276A (en) * | 2008-10-13 | 2010-06-30 | 庄添财 | Machine for milling arcs on both ends of top tube |
| CN201316896Y (en) * | 2008-12-25 | 2009-09-30 | 山东济宁特力机床有限公司 | Machine tool with central holes drilled on two end surfaces of digital control motor shaft mill |
| US8496238B1 (en) * | 2009-01-26 | 2013-07-30 | T&T Engineering Services, Inc. | Tubular gripping apparatus with locking mechanism |
| CN104175145A (en) * | 2014-08-26 | 2014-12-03 | 无锡柯马机械有限公司 | Machining clamp |
| CN204277590U (en) * | 2014-12-11 | 2015-04-22 | 无锡大龙马数控机床制造有限责任公司 | The circular shaft clamping mobile device of circular shaft dual-face milling machines |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106826705A (en) * | 2016-12-29 | 2017-06-13 | 天津市金万方钢结构有限公司 | Double sliding desk type steel structure operating platforms |
| CN108406392A (en) * | 2018-05-30 | 2018-08-17 | 珠海格力智能装备有限公司 | Centering mechanism |
| CN108406392B (en) * | 2018-05-30 | 2024-01-30 | 珠海格力智能装备有限公司 | Centering mechanism |
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| Publication number | Publication date |
|---|---|
| CN104440323B (en) | 2017-04-05 |
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