CN110980283A - Device for moving workpiece - Google Patents

Device for moving workpiece Download PDF

Info

Publication number
CN110980283A
CN110980283A CN201911305151.7A CN201911305151A CN110980283A CN 110980283 A CN110980283 A CN 110980283A CN 201911305151 A CN201911305151 A CN 201911305151A CN 110980283 A CN110980283 A CN 110980283A
Authority
CN
China
Prior art keywords
air
sealing structure
movable member
driving
flow channel
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
Application number
CN201911305151.7A
Other languages
Chinese (zh)
Other versions
CN110980283B (en
Inventor
严长志
许仕建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Chuangzhi Intelligent Equipment Co ltd
Original Assignee
Guangdong Chuangzhi Intelligent Equipment Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Chuangzhi Intelligent Equipment Co ltd filed Critical Guangdong Chuangzhi Intelligent Equipment Co ltd
Priority to CN201911305151.7A priority Critical patent/CN110980283B/en
Publication of CN110980283A publication Critical patent/CN110980283A/en
Application granted granted Critical
Publication of CN110980283B publication Critical patent/CN110980283B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/74Feeding, transfer, or discharging devices of particular kinds or types
    • B65G47/90Devices for picking-up and depositing articles or materials
    • B65G47/91Devices for picking-up and depositing articles or materials incorporating pneumatic, e.g. suction, grippers
    • B65G47/914Devices for picking-up and depositing articles or materials incorporating pneumatic, e.g. suction, grippers provided with drive systems incorporating rotary and rectilinear movements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)

Abstract

The invention discloses a device for moving a workpiece, wherein a valve component for automatically closing a sucker after the sucker is vacuumized is arranged in a connecting valve, so that a vertical pipe can be disconnected from an external vacuumizing device after the sucker is vacuumized, and the device is convenient to move and transfer by sucking the workpiece through the sucker; in addition, when air is fed and vacuum is broken, the valve component can be automatically opened, so that an external air feeding device can conveniently feed air into the sucker through the vertical pipe and the connecting valve, and the vacuum breaking is convenient; in addition, because the standpipe can rotate around the vertical axis relative movement seat, the sucking disc on the standpipe also can rotate relative movement seat promptly, and it needs the condition of rotation to be applicable to the work piece in some occasions.

Description

Device for moving workpiece
Technical Field
The invention relates to a device for moving a workpiece.
Background
At present, some sucking discs on the market are provided with air exhaust one-way valves for improving the suction force, after a user tightly attaches the sucking discs to an adsorbed piece, an air exhaust pump is connected with the air exhaust one-way valves on the sucking discs well to exhaust air in a sucking disc adsorption cavity, the air exhaust one-way valves are automatically closed after the air exhaust one-way valves are completed, the adsorption effect is good, however, the air exhaust one-way valves limit the ventilation direction, the air exhaust one-way valves supply air from outside to the existing air exhaust one-way valves and cannot break the vacuum of the sucking discs, and the user can only adopt other modes if the sucking discs are separated from the adsorbed piece, such as strongly prying the sucking discs through a knife to break the vacuum, or additionally arranging other vacuum breaking structures on the sucking discs, the suction disc.
In addition, the workpiece is mainly transferred by a transmission line or a clamp in the existing continuous motion, and the workpiece is not convenient to transfer by adopting the vacuum pumping sucker, and the transfer range of the vacuum pumping sucker is limited because the vacuum pumping sucker needs to be connected with a vacuum pumping device.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.
Disclosure of Invention
The invention overcomes the defects of the technology and provides a device for moving a workpiece.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a device for work piece removes, is including removing seat 1, it can be around vertical axis pivoted standpipe 2 to be connected with on removing seat 1, 2 upper ends of standpipe are connected with through connecting valve 3 and are used for holding the sucking disc 4 of work piece 100, connecting valve 3 upper end with the adsorption plane/the absorption chamber 41 intercommunication of sucking disc 4, be equipped with in connecting valve (3) and be used for automatic closing after sucking disc (4) are pumped the vacuum and the automatic valve component that opens when the broken vacuum of air feed.
The device for moving the workpiece is characterized in that the moving seat 1 is provided with the pulley block 11.
The device for moving the workpiece is as described above, the connecting valve 3 is internally provided with an air flow channel 31, the air flow channel 31 is provided with an air suction and supply port 311 for connecting with the vertical pipe 2 and an object connecting port 312 for connecting with the suction cup 4, the valve assembly comprises a movable member 32 which is arranged in the air flow channel 31 and can move back and forth, a sealing structure which can prevent the front and back of the air flow channel 31 from being communicated is arranged between the air flow channel 31 and the movable member 32 which are close to the object connecting port 312, the movable member 32 can move under the action of negative pressure to open the sealing structure when an external vacuum pumping device pumps vacuum to the air suction and supply port 311, a resetting device which is used for driving the movable member 32 to reset to close the sealing structure is arranged in the connecting valve 3, and the movable member 32 is connected with a resetting device which is used for driving the movable member 32 to move to open the sealing structure when the external air supply device supplies vacuum to the air suction The driving member 33 is provided with a force-bearing surface 331 which is pressed by the supplied gas when the external gas supply device supplies gas to the gas-extracting gas-supplying port 311 to break vacuum, so that the driving member 33 is powered to drive the movable member 32 to move and open the sealing structure.
The device for moving the workpiece as described above, the sealing structure includes a section of trumpet-shaped side wall surface 313 arranged in the air flow channel 31 and a blocking head portion 321 arranged on the movable member 32, and when the movable member 32 moves towards the trumpet-shaped side wall surface 313, the blocking head portion 321 can be attached to the trumpet-shaped side wall surface 313 so that the front and the back of the air flow channel 31 are not communicated.
In the above-described device for moving a workpiece, the return device is a first return spring 34 disposed in the air flow passage 31 for pressing the movable member 32 toward the flared sidewall surface 313.
The device for moving the workpiece as described above, the driving element 33 is sleeved on the movable element 32 near the air pumping and air feeding port 311 in a slip-proof manner, a cavity 332 not communicated with the air pumping and air feeding port 311 is formed between the outer wall of the driving element 33 and the inner wall of the connecting valve 3, the stressed surface 331 faces away from the direction of the air pumping and air feeding port 311, and a passage space 333 for air flow between the air pumping and air feeding port 311 and the sealing structure is provided in the driving element 33 or the movable element 32 or between the driving element 33 and the movable element 32.
In the device for moving the workpiece, the cavity 332 is communicated with the atmosphere, and the second return spring 36 for pressing the driving member 33 in a direction away from the air bleed 311 is disposed in the cavity 332.
In the above-mentioned device for moving a workpiece, the force-bearing surface 331 is a horn surface.
Compared with the prior art, the invention has the beneficial effects that:
1. the connecting valve is good in practicability, and a valve component for automatically closing the sucker after being vacuumized is arranged in the connecting valve, so that the vertical pipe can be disconnected from an external vacuumizing device after the sucker is vacuumized, and the device can move and suck a workpiece through the sucker to transfer conveniently; in addition, when air is fed and vacuum is broken, the valve component can be automatically opened, so that an external air feeding device can conveniently feed air into the sucker through the vertical pipe and the connecting valve, and the vacuum is broken conveniently; in addition, because the standpipe can rotate around the vertical axis relative to the moving seat, namely the sucker on the standpipe can also rotate relative to the moving seat, the device is suitable for the situation that workpieces need to rotate in some occasions.
2. The connecting valve has good practicability, the vacuumizing and vacuum breaking are carried out through the same air exhausting and feeding port, the structure is compact, the implementation is convenient, and the use is convenient; the arrangement of the sealing structure and the arrangement of the resetting device in the connecting valve are convenient for the sealing structure to be closed through the resetting device after the vacuumizing device finishes vacuumizing, so that the vacuumizing device can be stopped without running all the time to maintain the negative pressure state at the end of the object connecting port, on one hand, the energy consumption is reduced, on the other hand, the connecting valve is convenient to separate from the vacuumizing device, and therefore, the vacuumized object connected with the connecting valve can move conveniently, and the processing and the production are convenient; the sealing structure is characterized in that the driving part is arranged on the moving part, the stress surface is arranged on the driving part, and an external air supply device can supply air to the stress surface on the driving part when air is supplied from the air suction and supply port, so that the driving part can drive the moving part to move and open the sealing structure.
3. The cavity is arranged between the outer wall of the driving piece and the inner wall of the connecting valve in the connecting valve, so that gas which is supplied when the gas flow channel is supplied and broken vacuum can not be pressed on the outer wall of the driving piece to counteract the pressing force of the gas which is supplied to a stressed surface, and therefore, the driving piece can more easily obtain power to drive the moving piece to move so as to open the sealing structure.
4. The cavity in the connecting valve is communicated with the atmosphere, so that when the driving piece drives the moving piece to move and the sealing structure is to be opened, the air pressure of the cavity is not gradually increased along with the reduction of the volume of the cavity, the moving piece is not easily blocked, and the practicability is good; and the second return spring is arranged to facilitate the return of the driving piece.
Drawings
Fig. 1 is a perspective view of the present disclosure.
Fig. 2 is a cross-sectional view of the connection valve and suction cup of the present invention.
Fig. 3 is an exploded view of the connection valve of the present case.
Fig. 4 is an application diagram of the present disclosure.
Detailed Description
The features of the present invention and other related features are further described in detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1 to 3, a device for moving a workpiece includes a moving seat 1, wherein a vertical pipe 2 capable of rotating around a vertical axis is connected to the moving seat 1, a suction cup 4 for sucking a workpiece 100 is connected to an upper end of the vertical pipe 2 through a connection valve 3, an upper end of the connection valve 3 is communicated with a suction surface/a suction cavity 41 of the suction cup 4, and a valve assembly for automatically closing the suction cup (4) after the suction cup is vacuumized and automatically opening the suction cup when the suction cup is blown to the vacuum is provided in the connection valve (3).
As described above, during the vacuum pumping, the external vacuum pumping device is connected to the lower end of the vertical tube 2, and the air in the suction cup 4 is pumped out through the vertical tube 2 and the connecting valve 3, and during the vacuum breaking, the external air supply device is connected to the lower end of the vertical tube 2, and the air is sent into the suction cup 4 through the vertical tube 2 and the connecting valve 3.
As described above, the connecting valve 3 is provided with a valve assembly for automatically closing after the suction cup 4 is vacuumized, so that the standpipe 2 can be disconnected from an external vacuum extractor after the suction cup 4 is vacuumized, and the device can move and suck the workpiece 100 through the suction cup 4 for transfer; in addition, when air is fed and vacuum is broken, the valve component can be automatically opened, so that an external air feeding device can conveniently feed air into the sucker 4 through the vertical pipe 2 and the connecting valve 3, and the vacuum is broken conveniently; in addition, because the vertical tube 2 can rotate around the vertical axis relative to the movable base 1, that is, the suction cup 4 on the vertical tube 2 can also rotate relative to the movable base 1, it is suitable for the situation that the workpiece 100 needs to rotate in some occasions.
As mentioned above, in the specific implementation, the pulley block 11 is installed on the movable seat 1.
As described above, in specific implementation, the connecting valve 3 is provided with the air flow channel 31, the air flow channel 31 is provided with the air suction/supply port 311 for connecting with the standpipe 2 and the object connection port 312 for connecting with the suction cup 4, the valve assembly includes the movable member 32 disposed in the air flow channel 31 and capable of moving back and forth, a sealing structure capable of preventing the front and back of the air flow channel 31 from being communicated is disposed between the air flow channel 31 and the movable member 32 near the object connection port 312, the movable member 32 can move under the action of negative pressure to open the sealing structure when the external vacuum pumping device pumps vacuum to the air suction port 311, a resetting device for resetting the movable member 32 to close the sealing structure is disposed in the connecting valve 3, and the movable member 32 is connected with a resetting device for driving the movable member 32 to move to open the sealing structure when the external air supply device supplies vacuum to the air suction/supply port 311 to break vacuum, so that the sealing structure is opened The driving member 33 is provided with a force-bearing surface 331 which is pressed by the supplied gas when the external gas supply device supplies and breaks vacuum to the gas-extracting gas-supplying opening 311, so that the driving member 33 is powered to drive the movable member 32 to move and open the sealing structure.
As mentioned above, the connecting valve 3 of the present application has good practicability, and the evacuation and the vacuum breaking are performed through the same air suction/supply port 311, so that the structure is compact, the implementation is convenient, and the use is convenient; the arrangement of the sealing structure and the arrangement of the resetting device in the connecting valve 3 is convenient for the sealing structure to be closed through the resetting device after the vacuumizing device finishes vacuumizing, so that the vacuumizing device can be stopped without running all the time to maintain the negative pressure state at the end of the object connecting port 312, which is beneficial to reducing energy consumption on one hand and is convenient for the separation of the connecting valve 3 and the vacuumizing device on the other hand, thereby facilitating the movement of an object to be vacuumized connected with the connecting valve 3 and facilitating processing and production; the arrangement of the driving part 33 on the moving part 32 and the arrangement of the stressed surface 331 on the driving part 33 facilitate the supply of gas from an external gas supply device to the gas extraction and supply opening 311, so that the gas supply can press the stressed surface 331 on the driving part 33, thereby enabling the driving part 33 to drive the moving part 32 to move with power to open the sealing structure, and facilitating the breaking of vacuum.
As described above, in specific implementation, the sealing structure includes a flared sidewall surface 313 disposed in the airflow channel 31 and a blocking head 321 disposed on the movable element 32, and when the movable element 32 moves toward the flared sidewall surface 313, the blocking head 321 can be attached to the flared sidewall surface 313 so that the airflow channel 31 is not communicated with the front and the back.
As described above, in practical implementation, the return means is the first return spring 34 disposed in the airflow passage 31 for pressing the movable member 32 toward the trumpet-shaped sidewall surface 313.
As described above, in specific implementation, the driving element 33 is sleeved on the end of the movable element 32 close to the air pumping and air feeding port 311 in a slip-proof manner, a cavity 332 not communicated with the air pumping and air feeding port 311 is formed between the outer wall of the driving element 33 and the inner wall of the connecting valve 3, the stressed surface 331 faces away from the direction of the air pumping and air feeding port 311, and a passage space 333 for air flow between the air pumping and air feeding port 311 and the sealing structure is provided in the driving element 33, or in the movable element 32, or between the driving element 33 and the movable element 32.
As described above, the cavity 332 between the outer wall of the driving member 33 and the inner wall of the connecting valve 3 in the connecting valve 3 is provided to facilitate the supply of gas to the gas flow channel 31 for breaking vacuum without pressing the gas on the outer wall of the driving member 33 to counteract the pressing force of the gas on the force-bearing surface 331, so that the driving member 33 can more easily obtain power to drive the movable member 32 to move and open the sealing structure.
As described above, in practical implementation, the cavity 332 is communicated with the atmosphere, and the cavity 332 is provided with the second return spring 36 for pressing the driving member 33 in a direction away from the air bleed hole 311.
As described above, the cavity 332 in the connecting valve 3 is communicated with the atmosphere, so that when the driving element 33 drives the movable element 32 to move and the sealing structure is to be opened, the cavity 332 does not gradually increase the air pressure along with the reduction of the volume, so that the movable element 32 is not easily obstructed from moving, and the practicability is good; whereas the second return spring 36 is provided to facilitate the return of the driving member 33.
As described above, in practical implementation, the force-receiving surface 331 is a horn surface.
As mentioned above, the present disclosure is directed to a device for moving a workpiece, and all technical solutions that are the same as or similar to the present disclosure should be considered as falling within the scope of the present disclosure.

Claims (8)

1. The utility model provides a device for work piece removes, its characterized in that is including removing seat (1), it can be around vertical axis pivoted standpipe (2) to be connected with on removing seat (1), standpipe (2) upper end is connected with sucking disc (4) that are used for sucking work piece (100) through connecting valve (3), connecting valve (3) upper end with adsorption plane/absorption chamber (41) intercommunication of sucking disc (4), be equipped with in connecting valve (3) and be used for sucking disc (4) by automatic closed and the automatic valve component that opens when carrying out the broken vacuum of supplying air to sucking disc (4) after the evacuation.
2. A device for moving workpieces according to claim 1, characterised in that a set of pulleys (11) is mounted on the moving seat (1).
3. The device for moving the workpiece according to claim 1, wherein an air flow channel (31) is arranged in the connecting valve (3), the air flow channel (31) is provided with an air suction and supply port (311) for connecting with the vertical pipe (2) and an object connecting port (312) for connecting with the suction cup (4), the valve assembly comprises a movable member (32) which is arranged in the air flow channel (31) and can move back and forth, a sealing structure which can prevent the air flow channel (31) from communicating back and forth is arranged between the air flow channel (31) close to the object connecting port (312) and the movable member (32), the movable member (32) can move under the action of negative pressure when an external vacuum device performs vacuum suction on the air suction and supply port (311) to open the sealing structure, and a resetting device which is used for driving the movable member (32) to reset to close the sealing structure is arranged in the connecting valve (3), the movable piece (32) is connected with a driving piece (33) which is used for driving the movable piece (32) to move to open the sealing structure when an external air supply device supplies air to the air suction and supply port (311) for breaking vacuum, and a stress surface (331) which is pressed by the supplied air when the external air supply device supplies air to the air suction and supply port (311) for driving the movable piece (32) to move to open the sealing structure is arranged on the driving piece (33).
4. A device for moving a workpiece as defined in claim 3, wherein the sealing structure comprises a flared sidewall surface (313) disposed in the air flow channel (31) and a blocking head (321) disposed on the movable member (32), and the blocking head (321) can abut against the flared sidewall surface (313) when the movable member (32) moves toward the flared sidewall surface (313) so as to prevent the front and rear of the air flow channel (31) from communicating with each other.
5. A device for moving workpieces according to claim 4, characterised in that the return means is a first return spring (34) arranged in the air flow channel (31) for pressing the movable element (32) in the direction of the flared side wall surface (313).
6. A device for moving workpieces as defined in claim 3, wherein said driving member (33) is fitted over said movable member (32) at a position close to said air pumping and feeding port (311) in a slip-proof manner, a cavity (332) not communicating with said air pumping and feeding port (311) is formed between an outer wall of said driving member (33) and an inner wall of said connecting valve (3), said force-bearing surface (331) faces away from said air pumping and feeding port (311), and a passage space (333) for air flow between said air pumping and feeding port (311) and said sealing structure is provided in said driving member (33) or in said movable member (32) or between said driving member (33) and said movable member (32).
7. A device for moving workpieces according to claim 6, characterised in that the cavity (332) is open to the atmosphere, and in that a second return spring (36) is arranged in the cavity (332) for pressing the drive element (33) away from the suction/supply opening (311).
8. An apparatus for workpiece movement according to any of claims 3-7, characterized in that the force-bearing surface (331) is a trumpet surface.
CN201911305151.7A 2019-12-17 2019-12-17 Device for moving workpiece Active CN110980283B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911305151.7A CN110980283B (en) 2019-12-17 2019-12-17 Device for moving workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911305151.7A CN110980283B (en) 2019-12-17 2019-12-17 Device for moving workpiece

Publications (2)

Publication Number Publication Date
CN110980283A true CN110980283A (en) 2020-04-10
CN110980283B CN110980283B (en) 2021-08-27

Family

ID=70094934

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911305151.7A Active CN110980283B (en) 2019-12-17 2019-12-17 Device for moving workpiece

Country Status (1)

Country Link
CN (1) CN110980283B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116081291A (en) * 2023-03-02 2023-05-09 天津津亚电子有限公司 Air source separation type vacuum maintenance turnover mechanism

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6517050B1 (en) * 2001-09-28 2003-02-11 Parker-Hannifin Corporation Two way non leaking flow valve with full-open capability
CN2654560Y (en) * 2003-08-04 2004-11-10 阳程科技股份有限公司 Carrier having vacuum attracting device
CN1626431A (en) * 2003-12-08 2005-06-15 高德斯密特磁性系统Bv公司 Gripping apparatus and lifting equipment for gripping and lifting an object such as pallet part
CN104609181A (en) * 2014-12-25 2015-05-13 重庆勤发食品有限公司 Automatic vacuum absorption hand
CN107165923A (en) * 2016-03-07 2017-09-15 株式会社日本匹士克 The method of operating of absorption sucker and absorption sucker
CN207404674U (en) * 2017-03-07 2018-05-25 迅得机械(东莞)有限公司 Sucker assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6517050B1 (en) * 2001-09-28 2003-02-11 Parker-Hannifin Corporation Two way non leaking flow valve with full-open capability
CN2654560Y (en) * 2003-08-04 2004-11-10 阳程科技股份有限公司 Carrier having vacuum attracting device
CN1626431A (en) * 2003-12-08 2005-06-15 高德斯密特磁性系统Bv公司 Gripping apparatus and lifting equipment for gripping and lifting an object such as pallet part
CN104609181A (en) * 2014-12-25 2015-05-13 重庆勤发食品有限公司 Automatic vacuum absorption hand
CN107165923A (en) * 2016-03-07 2017-09-15 株式会社日本匹士克 The method of operating of absorption sucker and absorption sucker
CN207404674U (en) * 2017-03-07 2018-05-25 迅得机械(东莞)有限公司 Sucker assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116081291A (en) * 2023-03-02 2023-05-09 天津津亚电子有限公司 Air source separation type vacuum maintenance turnover mechanism

Also Published As

Publication number Publication date
CN110980283B (en) 2021-08-27

Similar Documents

Publication Publication Date Title
CN213320191U (en) Industrial robot composite clamp
CN110980283B (en) Device for moving workpiece
CN211733101U (en) Device for moving workpiece
CA2433088A1 (en) Breast pump
US9771200B2 (en) Easily-operated vacuum storage container
CN211738059U (en) Connecting valve structure convenient for vacuumizing and breaking vacuum
CN103848177B (en) A kind of large-area vacuum inhales tool system
CN209890212U (en) Rotary cover suction head device
CN218402671U (en) Direct-pressure pneumatic suction cup
CN111075940A (en) Connecting valve convenient for vacuumizing and breaking vacuum
CN206626207U (en) A kind of sucker vacuum valve structure for climbing robot
CN212421027U (en) Suction clamp
CN216512314U (en) Vacuum sucker
US20070048149A1 (en) Oil suction pump
CN218230925U (en) Suction pen
CN218568810U (en) Vacuum suction pen
CN220660905U (en) Small part adsorption device
CN213085812U (en) Vacuum suction device of glass cutting machine
CN214484216U (en) Steam box
CN219457562U (en) Vacuum suction pen
CN217340046U (en) Wall climbing device
CN214484214U (en) Can prevent to open steam ager of chamber door by accident
CN108861571B (en) Double-vortex type wafer suction nozzle assembly
CN219216739U (en) Micro-pressure vacuum suction device
CN218984624U (en) Air-suction type screw driver adopting clamping connecting bolt driver head

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant