CN108161601B - Motor train unit center hole polishing device - Google Patents
Motor train unit center hole polishing device Download PDFInfo
- Publication number
- CN108161601B CN108161601B CN201711434046.4A CN201711434046A CN108161601B CN 108161601 B CN108161601 B CN 108161601B CN 201711434046 A CN201711434046 A CN 201711434046A CN 108161601 B CN108161601 B CN 108161601B
- Authority
- CN
- China
- Prior art keywords
- arc
- polishing
- polishing head
- shaped elastic
- sand paper
- 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.)
- Active
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 90
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000005452 bending Methods 0.000 claims abstract description 8
- 230000000670 limiting effect Effects 0.000 claims description 17
- 239000004744 fabric Substances 0.000 claims description 9
- 241000271559 Dromaiidae Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 239000012634 fragment Substances 0.000 abstract description 5
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/48—Single-purpose machines or devices for grinding walls of very fine holes, e.g. in drawing-dies
-
- 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
-
- 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
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a polishing device for a central hole of a motor train unit, and relates to the technical field of polishing devices. The polishing machine comprises a polishing machine main body and a polishing head connected with the polishing machine main body, wherein a pair of sand paper clamping holes are formed in the polishing head; the polishing head is provided with arc-shaped elastic pieces at the hole walls of the sand paper clamping holes along the length direction, the bending direction of the arc-shaped elastic pieces is opposite to the rotating direction of the polishing head, a bearing surface is formed at the outer sides of the arc-shaped elastic pieces, and one side, far away from the bearing surface, of the arc-shaped elastic pieces is connected with the hole walls of the sand paper clamping holes; the center threaded connection of the polishing head has the regulation pole, be equipped with the regulation steel wire between the one end that arc shell fragment kept away from each other, under the effect that does not have the external force, the regulation steel wire is in the state of tightening, set up the spacing hole that supplies the regulation steel wire to pass on the regulation pole.
Description
Technical Field
The invention relates to the technical field of polishing devices, in particular to a polishing device for a central hole of a motor train unit.
Background
When the central hole of the hollow shaft of the motor train unit is machined, the center Kong Chaocha and the surface of the hollow shaft are provided with burrs or iron filings to generate jumping, so that the machining precision is reduced and waste products are easily generated. Therefore, before machining, the center hole needs to be polished and repaired so as to meet the requirements of the machining process. Currently, the polishing and repairing method for the center hole is generally completed by manually polishing with sand paper. The polishing method has the defects of low working efficiency and high labor intensity.
Disclosure of Invention
The invention aims to solve the technical problems that the existing polishing work efficiency of a center hole is low and the labor intensity is high.
In order to solve the technical problems, the invention provides a grinding device for a center hole of a motor train unit, which comprises a grinding machine main body and a grinding head connected with the grinding machine main body, wherein a pair of sand paper clamping holes are formed in the grinding head;
the polishing head is provided with arc-shaped elastic pieces at the hole walls of the sand paper clamping holes along the length direction, the bending direction of the arc-shaped elastic pieces is opposite to the rotating direction of the polishing head, a bearing surface is formed at the outer sides of the arc-shaped elastic pieces, and one side, far away from the bearing surface, of the arc-shaped elastic pieces is connected with the hole walls of the sand paper clamping holes;
the center threaded connection of the polishing head has the regulation pole, be equipped with the regulation steel wire between the one end that arc shell fragment kept away from each other, under the effect that does not have the external force, the regulation steel wire is in the state of tightening, set up the spacing hole that supplies the regulation steel wire to pass on the regulation pole.
The technical effects are as follows: the polishing head is driven by the polishing machine main body to work, the sand paper clamping hole is used for placing sand paper, the two arc-shaped elastic sheets are connected with the hole wall of the corresponding sand paper clamping hole, one side of the arc-shaped elastic sheet, which is far away from the bearing surface, is connected with the hole wall of the sand paper clamping hole, the sand paper is inserted into the sand paper clamping hole, the part, which extends out of the sand paper clamping hole, is contacted with the bearing surface of the arc-shaped elastic sheet, when the polishing machine main body works, the polishing head starts to rotate so as to drive the sand paper and the arc-shaped elastic sheet to rotate, the sand paper can contact with the hole wall of the center hole to polish the hole wall of the center hole, in addition, the sand paper can be abutted by the bearing surface of the arc-shaped elastic sheet, so that the sand paper is tightly abutted with the hole wall of the center hole to improve the polishing effect of the sand paper, further improve the polishing efficiency, when the force of the operator against the hole wall of the center hole is large, the arc-shaped elastic sheet can deform, and the larger impact is not formed between the polishing head and the side wall of the center hole, so that the injury to the operator caused by improper force in the operation process is avoided, in addition, if the bending degree of the arc-shaped elastic sheet is unchanged, one part of the abrasive paper is worn seriously under long-time work, so that the later polishing effect is reduced, the adjusting rod is connected with the center thread of the polishing head, the two arc-shaped elastic sheets are tensioned at the two ends of the adjusting steel wire, the adjusting rod is penetrated in the middle, the adjusting rod is rotated after one end of polishing is finished, the tightening or loosening of the adjusting steel wire is realized, the bending degree of the two arc-shaped elastic sheets is changed, and the contact point between the abrasive paper above the arc-shaped elastic sheet and the center hole is changed, namely, the other part of the sand paper is replaced to polish the side wall of the central hole, so that on one hand, the polishing effect on the wall of the central hole can be ensured, and on the other hand, the utilization rate of the sand paper can be improved.
The technical scheme of the invention is as follows:
further, limiting pieces used for limiting the abrasive cloth are arranged at two ends, perpendicular to the polishing head, of the inner side of the arc-shaped elastic piece.
According to the polishing device for the central hole of the motor train unit, the limiting piece comprises the elastic pressing plate, one end of the elastic pressing plate is fixedly connected with the arc-shaped elastic piece, and the other end of the elastic pressing plate is tightly abutted against the arc-shaped elastic piece.
The polishing device for the central hole of the motor train unit is characterized in that the polishing head is a conical polishing head, and the taper of the head of the conical polishing head is 60 degrees.
According to the polishing device for the central hole of the motor train unit, the side edge, away from the conical polishing head, of the arc-shaped elastic sheet is parallel to the outer side wall of the conical polishing head.
According to the polishing device for the central hole of the motor train unit, the rotary cap is arranged on the head of the polishing head and is fixedly connected with the adjusting rod.
The beneficial effects of the invention are as follows:
(1) The limiting piece provided by the invention can limit the abrasive cloth, so that the abrasive cloth can be attached to the arc-shaped elastic sheet on one hand, and the abrasive cloth can be prevented from being separated from the polishing head on the other hand, the limiting piece comprises the elastic pressing plate, the abrasive cloth is pressed on the arc-shaped elastic sheet by the restoring force of the elastic pressing plate, and the operation is simple and convenient, and the limiting effect is good;
(2) The polishing head is a conical polishing head, can be suitable for polishing the shape of the central hole of the hollow shaft of the motor train unit, and the side edge of the arc-shaped elastic sheet, which is far away from the conical polishing head, is parallel to the outer side wall of the conical polishing head, so that the arc-shaped elastic sheet can be suitable for polishing the central hole of the hollow shaft of the motor train unit.
(3) The rotating cap provided by the invention is convenient for an operator to rotate the adjusting rod.
Drawings
FIG. 1 is a schematic view of a structure for embodying a polishing head of the present invention;
FIG. 2 is a schematic view of a structure embodying the present invention for adjusting a wire;
fig. 3 is a schematic structural view of an elastic pressing plate according to the present invention.
Wherein: 1. a sander body; 2. polishing head; 21. sand paper clamping holes; 3. an arc-shaped elastic sheet; 31. a bearing surface; 32. adjusting the steel wire; 4. an adjusting rod; 41. a limiting hole; 42. rotating the cap; 5. and an elastic pressing plate.
Detailed Description
The structure of the polishing device for the central hole of the motor train unit is shown in fig. 1-3.
The motor train unit center hole polishing device comprises a polishing machine main body 1 and a polishing head 2 connected with the polishing machine main body 1, wherein the polishing head 2 is a conical polishing head, the conical degree of the head of the conical polishing head is 60 degrees, a pair of sand paper clamping holes 21 are formed in the polishing head 2, the polishing head 2 is driven to work by the polishing machine main body 1, and the sand paper clamping holes 21 are used for placing sand paper.
The polishing head 2 is provided with arc shrapnel 3 at the hole wall of the sand paper clamping hole 21 along the length direction, the bending direction of the arc shrapnel 3 is opposite to the rotation direction of the polishing head 2, the outer side of the arc shrapnel 3 forms a bearing surface 31, one side of the arc shrapnel 3 away from the bearing surface 31 is connected with the hole wall of the sand paper clamping hole 21, then sand paper is inserted into the sand paper clamping hole 21, and the part extending out of the sand paper clamping hole 21 is contacted with the bearing surface 31 of the arc shrapnel 3.
The center threaded connection of the grinding head 2 has the regulation pole 4, is equipped with the regulation steel wire 32 between the one end that arc shell fragment 3 kept away from each other, under the effect of no external force, adjusts steel wire 32 and is in the state of tightening, has offered the spacing hole 41 that supplies the regulation steel wire 32 to pass on the regulation pole 4, rotates regulation pole 4, can realize tightening up or loosening to adjusting steel wire 32, makes the bending degree of two arc shell fragments 3 change to change the contact point between arc shell fragment 3 top abrasive paper and the centre bore pore wall.
The limiting pieces used for limiting the abrasive cloth are arranged at the two ends, perpendicular to the polishing head 2, of the inner side of the arc-shaped elastic sheet 3, each limiting piece comprises an elastic pressing plate 5, one end of each elastic pressing plate 5 is fixedly connected with the arc-shaped elastic sheet 3, the other end of each elastic pressing plate tightly abuts against the arc-shaped elastic sheet 3, the abrasive cloth is pressed on the arc-shaped elastic sheet 3 by means of restoring force of the elastic pressing plates 5, and the abrasive cloth limiting device is simple and convenient to operate and good in limiting effect.
The side edge of the arc-shaped elastic sheet 3, which is far away from the conical polishing head, is parallel to the outer side wall of the conical polishing head, the head of the polishing head 2 is provided with a rotary cap 42, and the rotary cap 42 is fixedly connected with the adjusting rod 4.
The specific implementation is as follows:
penetrating sand paper into the sand paper clamping hole 21, tightly attaching the sand paper to the bearing surface 31 of the arc-shaped elastic sheet 3, pressing and limiting two ends of the sand paper by using the elastic pressing plate 5, starting the grinding machine main body 1, starting the grinding head 2 to rotate, driving the sand paper to rotate with the arc-shaped elastic sheet 3, enabling the sand paper to contact with the hole wall of the center hole to be ground, grinding the hole wall of the center hole, enabling the sand paper to be abutted by the bearing surface 31 of the arc-shaped elastic sheet 3, enabling the sand paper to be tightly abutted with the hole wall of the center hole to be ground, and improving the grinding effect of the sand paper on the hole wall of the center hole, and further improving the grinding efficiency; after polishing for a period of time, the rotary cap 42 is utilized to rotate the adjusting rod 4, so that tightening or loosening of the adjusting steel wire 32 is realized, the bending degree of the two arc-shaped elastic pieces 3 is changed, the contact point between the sand paper above the arc-shaped elastic pieces 3 and the wall of the central hole is changed, namely, the other part of the sand paper is replaced to polish the side wall of the central hole, on one hand, the polishing effect on the wall of the central hole can be ensured, and on the other hand, the utilization rate of the sand paper can be improved.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (4)
1. The utility model provides a EMUs centre bore grinding device which characterized in that: the polishing machine comprises a polishing machine main body (1) and a polishing head (2) connected with the polishing machine main body (1), wherein a pair of sand paper clamping holes (21) are formed in the polishing head (2);
the polishing head (2) is provided with arc-shaped elastic pieces (3) at the hole walls of the sand paper clamping holes (21) along the length direction, the bending direction of the arc-shaped elastic pieces (3) is opposite to the rotating direction of the polishing head (2), the outer sides of the arc-shaped elastic pieces (3) form bearing surfaces (31), and one sides of the arc-shaped elastic pieces (3) far away from the bearing surfaces (31) are connected with the hole walls of the sand paper clamping holes (21);
the polishing device is characterized in that an adjusting rod (4) is connected with the center of the polishing head (2) through threads, an adjusting steel wire (32) is arranged between the ends, away from each other, of the arc-shaped elastic sheets (3), the adjusting steel wire (32) is in a tightening state under the action of no external force, and a limiting hole (41) for the adjusting steel wire (32) to pass through is formed in the adjusting rod (4);
both ends of the inner side of the arc-shaped elastic sheet (3) perpendicular to the polishing head (2) are provided with limiting pieces for limiting abrasive cloth;
the polishing head (2) is a conical polishing head, and the taper of the head of the conical polishing head is 60 degrees.
2. The motor train unit center hole polishing device according to claim 1, wherein: the limiting piece comprises an elastic pressing plate (5), one end of the elastic pressing plate (5) is fixedly connected with the arc-shaped elastic piece (3), and the other end of the elastic pressing plate is tightly abutted against the arc-shaped elastic piece (3).
3. The motor train unit center hole polishing device according to claim 1, wherein: the side edge of the arc-shaped elastic sheet (3) far away from the conical polishing head is parallel to the outer side wall of the conical polishing head.
4. The motor train unit center hole polishing device according to claim 1, wherein: the head of the polishing head (2) is provided with a rotary cap (42), and the rotary cap (42) is fixedly connected with the adjusting rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434046.4A CN108161601B (en) | 2017-12-26 | 2017-12-26 | Motor train unit center hole polishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434046.4A CN108161601B (en) | 2017-12-26 | 2017-12-26 | Motor train unit center hole polishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108161601A CN108161601A (en) | 2018-06-15 |
| CN108161601B true CN108161601B (en) | 2024-03-29 |
Family
ID=62521332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711434046.4A Active CN108161601B (en) | 2017-12-26 | 2017-12-26 | Motor train unit center hole polishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108161601B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118493208B (en) * | 2024-06-17 | 2024-10-22 | 江苏安盾智能机电设备有限公司 | Taper sleeve cleaning equipment with polishing function |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2523893A1 (en) * | 1982-03-18 | 1983-09-30 | Rekord Brevetti Piffer Galvani | IMPROVED DISC FOR SUPPORTING ABRASIVE PAPER FOR SANDING WOOD PIECES |
| TWM332001U (en) * | 2007-11-09 | 2008-05-11 | Gong-Lun Zhang | Roughing-band wheel containing clipper |
| CN201632899U (en) * | 2009-11-27 | 2010-11-17 | 臧珂 | Sand paper grinder |
| CN102179763A (en) * | 2011-02-22 | 2011-09-14 | 智奇铁路设备有限公司 | Central hole polishing device for hollow shaft of motor train unit |
| CN104044048A (en) * | 2014-06-20 | 2014-09-17 | 山东电力建设第一工程公司 | Polishing and cleaning tool for inner holes of tube plates of condensers |
| CN104416437A (en) * | 2013-09-09 | 2015-03-18 | 麦启羡 | Self-leveling abrasive-paper grinding machine |
| CN105269422A (en) * | 2014-06-18 | 2016-01-27 | 上海贝琪信息科技有限公司 | Novel sand paper sander |
| CN105299206A (en) * | 2015-11-02 | 2016-02-03 | 重庆御捷汽车部件有限公司 | Automotive manual gear shifter convenient and fast to assemble and capable of adjusting clearance automatically |
| CN205835061U (en) * | 2016-06-28 | 2016-12-28 | 东莞捷荣技术股份有限公司 | A kind of arc grinding head and polisher thereof |
| CN205852451U (en) * | 2016-06-04 | 2017-01-04 | 东莞市湘将鑫五金制品有限公司 | Multi-functional automatic sander |
| CN206169830U (en) * | 2016-09-07 | 2017-05-17 | 北京交通大学 | Rechargeable rail profile modeling abrasive belt grinding machine |
| CN206455558U (en) * | 2017-02-13 | 2017-09-01 | 武海燕 | A kind of building decoration sanding apparatus |
| CN207858472U (en) * | 2017-12-26 | 2018-09-14 | 苏州贝尔纳德铁路设备有限公司 | A kind of EMU central hole polishing device |
-
2017
- 2017-12-26 CN CN201711434046.4A patent/CN108161601B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2523893A1 (en) * | 1982-03-18 | 1983-09-30 | Rekord Brevetti Piffer Galvani | IMPROVED DISC FOR SUPPORTING ABRASIVE PAPER FOR SANDING WOOD PIECES |
| TWM332001U (en) * | 2007-11-09 | 2008-05-11 | Gong-Lun Zhang | Roughing-band wheel containing clipper |
| CN201632899U (en) * | 2009-11-27 | 2010-11-17 | 臧珂 | Sand paper grinder |
| CN102179763A (en) * | 2011-02-22 | 2011-09-14 | 智奇铁路设备有限公司 | Central hole polishing device for hollow shaft of motor train unit |
| CN104416437A (en) * | 2013-09-09 | 2015-03-18 | 麦启羡 | Self-leveling abrasive-paper grinding machine |
| CN105269422A (en) * | 2014-06-18 | 2016-01-27 | 上海贝琪信息科技有限公司 | Novel sand paper sander |
| CN104044048A (en) * | 2014-06-20 | 2014-09-17 | 山东电力建设第一工程公司 | Polishing and cleaning tool for inner holes of tube plates of condensers |
| CN105299206A (en) * | 2015-11-02 | 2016-02-03 | 重庆御捷汽车部件有限公司 | Automotive manual gear shifter convenient and fast to assemble and capable of adjusting clearance automatically |
| CN205852451U (en) * | 2016-06-04 | 2017-01-04 | 东莞市湘将鑫五金制品有限公司 | Multi-functional automatic sander |
| CN205835061U (en) * | 2016-06-28 | 2016-12-28 | 东莞捷荣技术股份有限公司 | A kind of arc grinding head and polisher thereof |
| CN206169830U (en) * | 2016-09-07 | 2017-05-17 | 北京交通大学 | Rechargeable rail profile modeling abrasive belt grinding machine |
| CN206455558U (en) * | 2017-02-13 | 2017-09-01 | 武海燕 | A kind of building decoration sanding apparatus |
| CN207858472U (en) * | 2017-12-26 | 2018-09-14 | 苏州贝尔纳德铁路设备有限公司 | A kind of EMU central hole polishing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108161601A (en) | 2018-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204603983U (en) | A kind of knife sharpener grinding two-sided dise knife | |
| CN104385099A (en) | Crankshaft shaft neck grinding device | |
| CN108161601B (en) | Motor train unit center hole polishing device | |
| CN202155787U (en) | Polishing device for hollow shaft center hole of motor train unit | |
| CN102179763A (en) | Central hole polishing device for hollow shaft of motor train unit | |
| CN103302313B (en) | Metal button processing equipment | |
| CN207344280U (en) | Stop hole hole edge sanding apparatus | |
| CN203254285U (en) | All-purpose angle dresser for correcting angle of grinding wheel | |
| CN107971851B (en) | Centre bore grinding device | |
| CN203418413U (en) | Ball head grinder | |
| CN203266406U (en) | Work-piece fixing device on cylindrical grinding machine | |
| CN204771917U (en) | Section bar terminal surface burring device | |
| CN206614350U (en) | A kind of round shape material sanding apparatus | |
| CN109048570A (en) | A kind of mold manufacture surface spikes processing unit | |
| CN206614358U (en) | A kind of aero-engine bridle end face profiling polishing prosthetic device | |
| CN202763647U (en) | Cup body polisher | |
| CN203542299U (en) | Device for slotting and grinding saw blade | |
| CN103707139A (en) | Electric tool sharpener | |
| CN207858472U (en) | A kind of EMU central hole polishing device | |
| CN207858551U (en) | Polishing device for hollow shaft center hole of motor train unit | |
| CN204295465U (en) | Crankshaft journal lapping device | |
| CN204504933U (en) | A kind of spacing column head cutting machine | |
| CN207508863U (en) | A kind of high efficient mill plate machining device | |
| CN206622912U (en) | A kind of alloy cutter knife sharpening device | |
| CN104175210A (en) | Ball-headed grinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240130 Address after: No. 1701, Building 4, Runfeng Deshang, No. 60 Anli Road, Chaoyang District, Beijing, 100000 Applicant after: Xia Bingxin Country or region after: China Address before: 215104 Nanguandu 6 Yuexi Street, Wuzhong District, Suzhou City, Jiangsu Province Applicant before: SUZHOU BEIER NADE RAILWAY EQUIPMENT CO.,LTD. Country or region before: China |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |