CN116728120B - Quick clamping device for large vertical lathe - Google Patents
Quick clamping device for large vertical lathe Download PDFInfo
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- CN116728120B CN116728120B CN202311012711.6A CN202311012711A CN116728120B CN 116728120 B CN116728120 B CN 116728120B CN 202311012711 A CN202311012711 A CN 202311012711A CN 116728120 B CN116728120 B CN 116728120B
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- 229910000831 Steel Inorganic materials 0.000 claims description 43
- 239000010959 steel Substances 0.000 claims description 43
- 230000001788 irregular Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 101100545272 Caenorhabditis elegans zif-1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The application relates to a rapid clamping device of a large vertical lathe, which relates to the technical field of equipment tools and comprises a processing disc rotationally connected to the end face of a lathe body, wherein an adjusting groove is formed in the upper end face of the processing disc and is arranged around the center of the processing disc, the adjusting groove is connected end to end and is positioned at the edge of the processing disc, a through hole is formed in the center of the processing disc, a plurality of locking grooves which are arranged along the radial direction of the processing disc are formed in the upper end face of the processing disc, one end of each locking groove is communicated with the adjusting groove, the other end of each locking groove is communicated with the through hole, clamping teeth are connected in the locking grooves in a sliding mode, and a driving assembly for driving the clamping teeth to move along the locking grooves is arranged on the processing disc. The application has the effect of rapidly clamping irregular workpieces.
Description
Technical Field
The application relates to the technical field of equipment tools, in particular to a rapid clamping device of a large vertical lathe.
Background
The vertical lathe is called as a vertical lathe for short, is mainly used for processing large and heavy workpieces with large diameter and short length and workpieces which are not easy to clamp on a horizontal lathe, and under the condition that the rotation diameter is satisfied, the workpiece which is too heavy is not easy to clamp on a horizontal lathe, and the vertical lathe can solve the problems due to the dead weight of the vertical lathe and the influence on the processing precision.
In the production process of large ring forgings, a vertical numerical control lathe is generally adopted for machining, a workpiece is clamped by a clamping fixture on a vertical lathe commonly used in factories at present, the clamping fixture is usually a plurality of clamping blocks, a plurality of sliding grooves which are radially arranged are formed in the lathe, then the clamping blocks are enabled to prop against the workpiece on the end face of the lathe through a hydraulic cylinder and the like, but the clamping fixture can only slide along the diameter direction, and the clamping direction of the clamping blocks is difficult to adjust, so that the workpiece is difficult to stably clamp when the workpiece faces irregular or non-circular workpieces.
Disclosure of Invention
In order to rapidly clamp irregular workpieces, the application provides a rapid clamping device of a large vertical lathe.
The application provides a rapid clamping device for a large vertical lathe, which adopts the following technical scheme:
the utility model provides a large-scale vertical lathe quick clamping device, includes the processing disc of rotating connection on lathe body terminal surface, the up end of processing disc is seted up around the adjustment tank that processing disc centre of a circle set up, adjustment tank end to end just the adjustment tank is located the edge of processing disc, the through-hole has been seted up to the center department of processing disc, set up a plurality of edges on the up end of processing disc the processing disc radially carries out the tight locked groove that sets up, tight locked groove one end with the adjustment tank is linked together, the other end of tight locked groove with the through-hole is linked together, tight locked groove sliding connection has the centre gripping tooth, be equipped with on the processing disc and be used for the drive the centre gripping tooth is followed the drive assembly that tight locked groove removed, the centre gripping tooth includes centre gripping disc and four arc tooth teeth, four arc tooth centers on the center department equidistance of centre gripping disc sets up, the outer cambered surface orientation of four arc tooth teeth the axis direction of centre gripping disc, arc tooth rotation connection is in on the centre gripping disc.
Through adopting above-mentioned technical scheme, when carrying out the centre gripping to irregular work piece, can follow the regulating tank according to the appearance of work piece and remove the centre gripping tooth, slide the centre gripping tooth to suitable tight locking inslot, then accessible drive assembly drives a plurality of centre gripping teeth and removes to the work piece simultaneously, make a plurality of centre gripping teeth support the center department at the processing disc with the work piece, can fix irregular or regular work piece from this, and can change the centre gripping direction of centre gripping tooth according to the flexibility, and can carry out the butt with the work piece and press from both sides the dress to the work piece through four arc tooth teeth, and when the preliminary butt of arc tooth is on the lateral wall of work piece, the arc tooth can be according to the edge profile of fixed work piece, automatically rotate to suitable and stable fixed angle, make tooth on the arc tooth face work piece one side, improve the tooth on the arc tooth and the contact quantity of work piece, from this improves the fixed effect of arc tooth to the work piece, can carry out the clamp to regular or irregular work piece steadily and fast from this.
Optionally, the lower extreme of centre gripping tooth can be dismantled and be connected with the slider, follow is seted up to the both sides in the locking groove the spacing groove that locking groove length direction set up, the both sides rigid coupling of slider has the stopper, the stopper with spacing groove one-to-one just stopper sliding connection is in the spacing groove.
Through adopting above-mentioned technical scheme, accessible stopper and spacing groove restriction slider's slip direction, and then inject the direction of motion of drive assembly drive clamping tooth, improve the stability that clamping tooth removed in the locking groove from this.
Optionally, a groove for fixing the clamping teeth is formed at the upper end of the sliding block, the bottom of the groove is larger than the notch of the groove, and the clamping teeth are inserted in the groove in a sliding manner.
Through adopting above-mentioned technical scheme, the mode of accessible slip grafting is fixed the centre gripping tooth on the slider or is dismantled the centre gripping tooth from the slider, can reduce the quantity of centre gripping tooth according to the shape and the volume of work piece from this fast, and can be convenient for change the centre gripping tooth.
Optionally, the drive assembly is including establishing a plurality of pneumatic cylinders in the through-hole, the flexible direction of pneumatic cylinder piston rod is on a parallel with the axis direction of processing disc, be located same two of processing disc radial direction be equipped with same steel cable in the locking groove, steel cable tip with the slider rigid coupling, the pneumatic cylinder with steel cable one-to-one, the pneumatic cylinder piston rod tip rotates and is connected with the turning block, the steel cable passes the turning block with turning block sliding connection.
Through adopting above-mentioned technical scheme, confirm a pair of clamping teeth that need remove, the pneumatic cylinder that the steel cable between two clamping teeth is aimed at of accessible control, the piston rod that makes the pneumatic cylinder contracts thereby makes the piston rod of pneumatic cylinder drive the steel cable remove, and then make the both ends of steel cable be close to one side each other remove, and make clamping teeth butt on the work piece, and when the irregular time of work piece, the clamping teeth butt of steel cable one end is on the work piece, the pneumatic cylinder can continue to shrink, because steel cable sliding connection is on the turning block, and then the other end of steel cable can drive clamping teeth and continue to remove to the work piece, until clamping teeth butt completely on the work piece, and every steel cable is controlled by independent pneumatic cylinder, the removal between a plurality of steel cables is mutually noninterfered, when facing the work piece of irregular shape, can make the steady butt of every clamping teeth all on the work piece, can carry out stable centre gripping to regular or irregular work piece from this.
Optionally, each steel rope is fixedly connected with a label.
Through adopting above-mentioned technical scheme, because each steel cable all corresponds a pneumatic cylinder, and then the label on the accessible steel cable judges the pneumatic cylinder that needs to control fast, can improve the clamp efficiency to the work piece from this.
Optionally, four clamping grooves have been seted up on the clamping disk, the clamping groove centers on the axis direction equidistance setting of clamping disk, the clamping groove is followed the radial direction of clamping disk sets up, the clamping groove with arc tooth one-to-one just arc tooth sliding connection is in the clamping groove, four be equipped with between the arc tooth be used for making four the arc tooth keeps away from the elastic component of state each other.
Through adopting above-mentioned technical scheme, after arc tooth butt to the work piece, the arc tooth can extrude the elastic component, and after the elastic component was extrudeed, the arc tooth with work piece butt can be followed the centre department of centre gripping disc and removed, simultaneously with the arc tooth of work piece butt arc tooth both sides can rotate to the arc tooth one side by the work piece butt to make the arc tooth and the work piece butt with the arc tooth of work piece butt arc tooth both sides, the elastic force also can be applyed to the arc tooth to the elastic block simultaneously, improves the butt effect of arc tooth and work piece.
Optionally, the elastic piece is an elastic rubber ball, and the elastic rubber ball is fixedly connected to the center of the upper end face of the clamping disc.
By adopting the technical scheme, the elastic rubber ball has better ductility, can be used repeatedly, has stronger reliability and is easy to purchase.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the clamping teeth can be moved along the adjusting groove according to the appearance of the workpiece and slide into the proper locking groove, and then the driving assembly can drive the clamping teeth to move towards the workpiece, so that the clamping teeth can tightly prop the workpiece at the center of the processing disc, and the irregular or regular workpiece can be fixed;
2. when the workpiece is faced with the irregular shape, each clamping tooth can be stably abutted on the workpiece, so that the workpiece can be stably clamped regularly or irregularly;
3. when the preliminary butt of arc tooth is on the lateral wall of work piece, the arc tooth can be according to the edge profile of fixed work piece, and automatic rotation is to stable fixed angle, makes the tooth on the arc tooth towards work piece one side, improves the contact quantity of tooth on the arc tooth and work piece, improves the fixed effect of arc chi tooth to the work piece from this.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present application;
FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;
FIG. 3 is a partially enlarged schematic illustration of portion B of FIG. 1;
FIG. 4 is a schematic view of a clamping groove according to an embodiment of the present application;
in the figure, 1, a lathe body; 2. processing a disc; 21. an adjustment tank; 22. a through hole; 23. a locking groove; 231. a limit groove; 3. clamping teeth; 31. clamping a disc; 311. a clamping groove; 32. arc teeth; 33. an elastic rubber ball; 34. a connecting column; 4. a slide block; 41. a groove; 42. a limiting block; 5. a drive assembly; 51. a hydraulic cylinder; 511. a rotating block; 52. a steel rope; 6. a label; 7. and a support ring.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 4.
The embodiment of the application is as follows: referring to fig. 1 and 2, the quick clamping device of the large vertical lathe comprises a processing disc 2 which is rotationally connected to a lathe body 1, a circular through hole 22 is formed in the center of the processing disc 2, locking grooves 23 which are formed around the axis of the processing disc 2 at equal intervals are formed in the upper end face of the processing disc 2, eight locking grooves 23 are formed in the drawing, adjusting grooves 21 which are connected end to end are formed in the upper end face of the processing disc 2, the adjusting grooves 21 are concentrically arranged with the processing disc 2, the adjusting grooves 21 are located at the edge of the outer cambered surface of the processing disc 2, and the adjusting grooves 21 are communicated with the locking grooves 23.
Referring to fig. 1 and 3, a pair of sliders 4 is provided in the locking groove 23, two radial sliders 4 in the locking groove 23 are provided in a pair, three pairs of sliders 4 are provided in the drawing, the sliders 4 are provided in a cylindrical shape, two sides of the sliders 4 are fixedly connected with limiting blocks 42, limiting grooves 231 are provided on the side walls of two sides in the locking groove 23, the limiting grooves 231 are provided along the length direction of the locking groove 23 and the limiting blocks 42 are slidably connected in the limiting grooves 231, and therefore the sliders 4 are slidably connected in the locking groove 23 through the limiting blocks 42 and the limiting grooves 231, and the sliders 4 can slide into the adjusting grooves 21 along the locking groove 23.
Referring to fig. 1 and 2, a driving unit 5 for driving the slider 4 to move toward one side toward one another or to move away from one another along the locking groove 23 is provided in the through hole 22. The driving assembly 5 comprises a plurality of steel ropes 52, three steel ropes 52 are arranged in the drawing, the steel ropes 52 are located between two sliding blocks 4 in the same pair, holes for the steel ropes 52 to move to different positions are formed in the intrados of the through holes 22 and the side walls of the locking grooves 23, and the end parts of the steel ropes 52 are fixedly connected with the sliding blocks 4.
The driving assembly 5 further comprises three hydraulic cylinders 51 arranged on the lathe body 1, the expansion and contraction directions of the hydraulic cylinders 51 are perpendicular to the upper end face of the lathe body 1, the end portions of piston rods of the hydraulic cylinders 51 are rotatably connected with rotating blocks 511, the rotating blocks 511 are in one-to-one correspondence with steel ropes 52, and the steel ropes 52 penetrate through the rotating blocks 511 and are in sliding connection with the rotating blocks 511.
Thus, after the position of the slider 4 in the locking groove 23 is determined according to the shape of the workpiece, the hydraulic cylinder 51 is activated to retract the piston rod of the hydraulic cylinder 51, and the hydraulic cylinder 51 is further caused to move the middle section of the steel wire 52 downward, thereby moving both ends of the steel wire 52 to the through hole 22 side, and thereby moving the slider 4 at both ends of the steel wire 52 to the through hole 22 side.
Meanwhile, in order to reduce the situation that the service life of the steel ropes 52 is influenced due to mutual friction between two adjacent steel ropes 52 when the hydraulic cylinders 51 drive the steel ropes 52 to move, the upper ends of the hydraulic cylinders 51 are fixedly connected with the supporting rings 7, the supporting rings 7 are concentrically arranged with piston rods of the hydraulic cylinders 51, and when the rotating blocks 511 on the piston rods of the hydraulic cylinders 51 drive the steel ropes 52 to move downwards, the steel ropes 52 can be abutted to the side walls of the supporting rings 7 and slide downwards along the side walls of the supporting rings 7.
Referring to fig. 1, 2, and 3, in order to facilitate the confirmation of the hydraulic cylinder 51 in which the steel cord 52 is located, a tag 6 is fixedly attached to the arc-shaped side wall of the steel cord 52.
Referring to fig. 1, 3 and 4, the upper end of the slider 4 is provided with a groove 41, the groove 41 is a T-shaped groove, the bottom of the groove 41 is larger than the notch of the groove 41, the clamping teeth 3 are arranged above the slider 4, the clamping teeth 3 comprise a clamping disc 31 and four arc teeth 32 on the clamping disc 31, the lower end of the clamping disc 31 is provided with a T shape matched with the shape of the groove 41, the lower end of the clamping disc 31 is slidingly inserted in the groove 41, the upper end surface of the clamping disc 31 is provided with four clamping grooves 311, the clamping grooves 311 are equidistantly arranged around the axial direction of the clamping disc 31, and the clamping grooves 311 extend along the radial direction of the clamping disc 31.
Referring to fig. 4, four arc teeth 32 are equidistantly disposed around the axial direction of the clamping disk 31, and the outer arc surfaces of the four arc teeth 32 face the axial direction of the clamping disk 31, the lower ends of the arc teeth 32 are rotatably connected with connecting columns 34, the connecting columns 34 are perpendicular to the upper end surface of the clamping disk 31, and the lower ends of the connecting columns 34 are slidably connected in the clamping grooves 311.
An elastic member is arranged at the center of the upper end of the clamping disc 31, the elastic member is an elastic rubber ball 33 in the figure, and the elastic rubber ball 33 is fixedly connected to the upper end face of the clamping disc 31.
Therefore, when the arc teeth 32 are initially abutted on the side wall of the workpiece, the arc teeth 32 can enable the teeth on the arc teeth 32 to face one side of the workpiece according to the edge profile of the fixed workpiece, then if the arc teeth 32 are abutted against the workpiece, the arc teeth 32 abutted against the workpiece can squeeze the elastic rubber ball 33, and meanwhile, the arc teeth 32 abutted against the workpiece can move towards the center of the clamping disc 31 along the clamping groove 311, meanwhile, the arc teeth 32 on two sides of the arc teeth 32 abutted against the workpiece can rotate towards one side of the arc teeth 32 abutted against the workpiece through the connecting column 34, and the arc teeth 32 on two sides of the arc teeth 32 abutted against the workpiece are abutted against the workpiece.
The implementation principle of the embodiment of the application is as follows: when an irregular workpiece is clamped, the sliding blocks 4 can be moved along the adjusting grooves 21 according to the appearance of the workpiece, three groups of sliding blocks 4 can slide into the proper locking grooves 23, the sliding direction of the sliding blocks 4 is limited through the limiting blocks 42 and the limiting grooves 231, then the hydraulic cylinders 51 can be controlled to drive the two ends of the steel ropes 52 to be close to each other through the rotating blocks 511, further the two clamping teeth 3 on the same steel rope 52 move to the side close to each other along the locking grooves 23, the workpiece is abutted against the center of the processing disc 2 by the clamping teeth 3, meanwhile, if the clamping teeth 3 at one end of the steel rope 52 are abutted against the workpiece, the hydraulic cylinders 51 can be continuously contracted, and the steel rope 52 is connected onto the rotating blocks 511 on the piston rods of the hydraulic cylinders 51 in a sliding mode, and then the other end of the steel rope 52 can drive the clamping teeth 3 to continuously move until the clamping teeth 3 are completely abutted against the workpiece, and the irregular workpiece can be stably clamped on the processing disc 2.
The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (5)
1. The utility model provides a large-scale vertical lathe quick clamping device, includes processing disc (2) of swivelling joint on lathe body (1) terminal surface, its characterized in that, processing disc (2) up end is seted up around processing disc (2) centre of a circle setting's adjustment tank (21), adjustment tank (21) end to end just adjustment tank (21) are located processing disc (2) edge, processing disc (2) center department has seted up through-hole (22), processing disc (2) up end is last to have seted up a plurality of edges processing disc (2) radially go on setting up lock groove (23), lock groove (23) one end with adjustment tank (21) are linked together, lock groove (23) other end with through-hole (22) are linked together, lock groove (23) sliding connection has centre gripping tooth (3), be equipped with on processing disc (2) are used for the drive centre gripping tooth (3) are followed lock groove (23) removal drive assembly (5), set up a plurality of edges (31) are followed in the radial direction of processing disc (2) lock groove (23), lock groove (23) one end with lock groove (21) are linked together the other end is linked together in the through-up (21), lock groove (23) is linked to be linked together, lock groove (23) is linked to be linked together, the centre of rotation (22) is linked to be provided with centre of rotation (22) by a clamp tooth (22) by tooth (23), one (23) by the centre of tooth (23), the arc teeth (32) are rotationally connected to the clamping disc (31), four clamping grooves (311) are formed in the clamping disc (31), the clamping grooves (311) are formed around the axial direction of the clamping disc (31) at equal intervals, the clamping grooves (311) are formed in the radial direction of the clamping disc (31), the clamping grooves (311) are in one-to-one correspondence with the arc teeth (32) and are slidably connected to the arc teeth (32) in the clamping grooves (311), four elastic pieces used for enabling the arc teeth (32) to keep in a mutually-far state are arranged between the arc teeth (32), the elastic pieces are arranged to be elastic rubber balls (33), and the elastic rubber balls (33) are fixedly connected to the center of the upper end face of the clamping disc (31).
2. The rapid clamping device of the large vertical lathe according to claim 1, wherein a sliding block (4) is detachably connected to the lower end of the clamping tooth (3), limiting grooves (231) arranged along the length direction of the locking grooves (23) are formed in two sides of the locking grooves (23), limiting blocks (42) are fixedly connected to two sides of the sliding block (4), the limiting blocks (42) are in one-to-one correspondence with the limiting grooves (231), and the limiting blocks (42) are slidably connected in the limiting grooves (231).
3. The rapid clamping device for the large vertical lathe according to claim 2, wherein a groove (41) for fixing the clamping tooth (3) is formed in the upper end of the sliding block (4), the bottom of the groove (41) is larger than the notch of the groove (41), and the clamping tooth (3) is slidably inserted into the groove (41).
4. A rapid clamping device for a large vertical lathe according to claim 3, wherein the driving assembly (5) comprises a plurality of hydraulic cylinders (51) arranged in the through holes (22), the telescopic directions of piston rods of the hydraulic cylinders (51) are parallel to the axial direction of the processing disc (2), the same steel rope (52) is arranged in two locking grooves (23) in the same radial direction of the processing disc (2), the end parts of the steel rope (52) are fixedly connected with the sliding blocks (4), the hydraulic cylinders (51) are in one-to-one correspondence with the steel rope (52), the end parts of the piston rods of the hydraulic cylinders (51) are rotationally connected with rotating blocks (511), and the steel rope (52) passes through the rotating blocks (511) to be in sliding connection with the rotating blocks (511).
5. A rapid clamping device for large vertical lathes as claimed in claim 4 wherein each said steel cord (52) is fixedly secured with a tag (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311012711.6A CN116728120B (en) | 2023-08-12 | 2023-08-12 | Quick clamping device for large vertical lathe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311012711.6A CN116728120B (en) | 2023-08-12 | 2023-08-12 | Quick clamping device for large vertical lathe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116728120A CN116728120A (en) | 2023-09-12 |
| CN116728120B true CN116728120B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311012711.6A Active CN116728120B (en) | 2023-08-12 | 2023-08-12 | Quick clamping device for large vertical lathe |
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| CN (1) | CN116728120B (en) |
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| CN217914027U (en) * | 2022-05-21 | 2022-11-29 | 恒可自动化科技无锡有限公司 | Machine parts processes frock |
| CN217965930U (en) * | 2022-07-11 | 2022-12-06 | 六安市智联铝业科技有限公司 | Positioning assembly for aluminum product treatment |
| CN218017102U (en) * | 2022-07-19 | 2022-12-13 | 上海西格码机床有限公司 | Clamping device for machining steering knuckle |
| CN218874558U (en) * | 2022-12-19 | 2023-04-18 | 南京沃戴尔精工科技有限公司 | Anchor clamps structure of nitrogen gas spring processing usefulness |
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| CN116728120A (en) | 2023-09-12 |
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