CN209902722U - Clamp for machine tool machining - Google Patents
Clamp for machine tool machining Download PDFInfo
- Publication number
- CN209902722U CN209902722U CN201920739025.1U CN201920739025U CN209902722U CN 209902722 U CN209902722 U CN 209902722U CN 201920739025 U CN201920739025 U CN 201920739025U CN 209902722 U CN209902722 U CN 209902722U
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- clamp
- machine tool
- head
- connecting block
- crank connecting
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Abstract
The utility model discloses a clamp for machine tool machining, which comprises an operation bedplate, a supporting seat, a workpiece fixing seat, a fixing clamp, a clamp head and a crank connecting block; one end of the upper surface of the operation bedplate is connected with the supporting seat, and the other end of the upper surface of the operation bedplate is connected with the workpiece fixing seat; the crank connecting block is rotatably connected with the upper surface of the supporting seat, one end of the crank connecting block is sequentially connected with the fixing clamp and the clamp head, and the space formed by the lower end of the clamp head and the top end of the workpiece fixing seat is used for fixing a workpiece to be processed. Can freely remove the height and the angle of anchor clamps head through the crank connecting block, and then can freely adjust the angle to being processed the work piece centre gripping, can carry out the processing of multi-angle to the work piece, through the common centre gripping of work piece fixing base and anchor clamps head, clamping performance is stable. And simultaneously, the utility model discloses simple structure, the installation of being convenient for is used.
Description
Technical Field
The utility model belongs to the anchor clamps field relates to an anchor clamps for machine tool machining.
Background
Milling machines are mainly machine tools for machining various surfaces on workpieces with milling cutters. Typically the milling cutter rotational movement is the primary movement and the milling cutter movement is the feed movement. It can be used for processing plane, groove, various curved surfaces and gears. The milling machine is a machine tool with wide application, and can process planes, grooves, tooth dividing parts, spiral surfaces and various curved surfaces on the milling machine. In addition, the method can be used for machining the surface and inner hole of the revolving body, cutting off the revolving body, and the like. When the milling machine works, a workpiece is arranged on a workbench or accessories such as an indexing head, the milling cutter rotates to move mainly, and the workpiece can obtain a required processing surface by the aid of the feeding motion of the workbench or the milling head.
The fixture is used for fixing a processing object in the mechanical manufacturing process, particularly in the use of a milling machine, and means that the fixture occupies a correct position to ensure that the fixture meets the requirements of various processing precisions stably and reliably so as to accept construction or detection.
The currently used clamp cannot freely adjust the angle for clamping the processed object, so that the workpiece cannot be processed in multiple angles; only one workpiece can be machined, and workpieces with different sizes are difficult to machine.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an anchor clamps for machine tool machining.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a clamp for machining a machine tool comprises an operation bedplate, a supporting seat, a workpiece fixing seat, a fixing clamp, a clamp head and a crank connecting block;
one end of the upper surface of the operation bedplate is connected with the supporting seat, and the other end of the upper surface of the operation bedplate is connected with the workpiece fixing seat; the crank connecting block is rotatably connected with the upper surface of the supporting seat, one end of the crank connecting block is sequentially connected with the fixing clamp and the clamp head, and the space formed by the bottom end of the clamp head and the top end of the workpiece fixing seat is used for fixing a workpiece to be processed.
The utility model discloses further improvement lies in:
the waste removing bin is detachably connected with the upper surface of the operation bedplate and is positioned on one side of the workpiece fixing seat far away from the supporting seat.
The waste removing bin comprises a suction head, a fixed column, a suction pipe, a fan, a filter screen, a waste placing box, an exhaust pipe and a bin body;
the suction head is arranged at one end, close to the workpiece fixing seat, of the upper surface of the bin body, and the exhaust pipe is arranged at one end, far away from the workpiece fixing seat, of the upper surface of the bin body; the suction head is sequentially connected with a suction pipe, a fan, a waste material placing box and an exhaust pipe; the filter screen is positioned in the waste material placing box and connected with the inner surface of the waste material placing box, and the filter screen is positioned above the connection part of the fan and the waste material placing box; one end of the fixing column is connected with the suction head, and the other end of the fixing column is connected with the upper surface of the bin body.
The anti-skid device also comprises an anti-skid operating handle and a plurality of anti-skid supporting legs;
the anti-skidding operating handle is connected with the one end that the fixation clamp was kept away from to the crank connecting block, and a plurality of anti-skidding supporting legs all are connected with operation platen lower surface fixed connection.
Still include oblique guide pulley and vertical guide pulley, the one end of oblique guide pulley and vertical guide pulley all is connected with the crank connecting block, and the other end all is connected with the supporting seat.
The clamp head comprises a taper shank, a cross universal shaft, a transmission shaft, a cylindrical pin, a protective shell, a clamping mouth and a pressing block;
the outer surface of the taper shank is connected with the fixing clamp, and the bottom end of the taper shank is connected with the protective shell; the cross universal shaft is connected with the inner surface of the protective shell; one end of the transmission shaft is connected with the cross universal shaft, and the other end of the transmission shaft is sequentially connected with the cylindrical pin, the clamping nozzle and the pressing block; the transmission shaft is sleeved with a telescopic spring, and the telescopic spring is sleeved with a driven sleeve; one end of the clamping mouth connected with the pressing block extends out of the protective shell.
A plurality of screw holes are formed in the protective shell, a torque adjusting screw and a torque transmission steel ball are arranged in each screw hole, one end of each torque transmission steel ball is connected with the clamping mouth, and the other end of each torque transmission steel ball is connected with the torque adjusting screw; one end of the torque adjusting screw, which is far away from the torque transmission steel ball, extends out of the screw hole.
The workpiece fixing seat comprises a bottom plate, a plurality of limiting blocks, a plurality of bolts and a plurality of nuts;
the plurality of limiting blocks are connected with the upper surface of the bottom plate, and the lower surface of the bottom plate is connected with the upper surface of the operation table plate; one end of the bolt sequentially penetrates through a bolt through hole formed in the limiting block, a base plate through hole formed in the base plate and an operation platen through hole formed in the operation platen to be connected with the nut.
At least two bolt through holes are formed in each limiting block.
The fixing clamp comprises a rotating shaft, a first clamping jaw, a second clamping jaw and a non-slip mat;
one end of the rotating shaft is connected with the crank connecting block, and the other end of the rotating shaft is connected with the first clamping jaw and the second clamping jaw; one side of the non-slip mat is connected with the inner walls of the first clamping jaw and the second clamping jaw in a bonding mode, and the other side of the non-slip mat is connected with the outer surface of the clamp head.
Compared with the prior art, the utility model discloses following beneficial effect has:
the clamp head is connected with the crank connecting block through the fixing clamp, the crank connecting block is moved, the height and the angle of the clamp head can be adjusted under the driving of the crank connecting block, and the clamping angle of a workpiece to be processed can be freely adjusted. The clamp head is matched with the workpiece fixing seat, so that not only can the workpiece to be machined be stably clamped, but also the workpiece to be machined can be clamped in a multi-angle manner, and further the multi-angle treatment of the workpiece to be machined is realized; the clamping of workpieces with different heights can be realized through the height adjustment, and the adaptability is strong. And simultaneously, the utility model discloses simple structure, the installation of being convenient for is used.
Further, set up and remove useless storehouse, drive the waste material that the suction head appears in with work piece course of working through the straw through the fan and adsorb, utilize the blast pipe to transport to the waste material and place the box and store, the filtration of rethread filter screen guarantees that the waste material can not spill the waste material and place the box, guarantees that the course of working is not influenced. Effectively prevent that the waste material that produces from blockking up the position that causes the centre gripping and taking place the skew in the course of working, cause huge economic loss's the condition to appear.
Furthermore, the anti-skidding operating handle and the anti-skidding supporting legs are arranged, so that the stability of the whole clamp is ensured when the clamp is used.
Further, set up oblique guide pulley and vertical guide pulley, remove the crank connecting block through external force and drive oblique guide pulley and vertical guide pulley and remove and transmit power to the anchor clamps head, rethread anchor clamps head carries out the centre gripping to the work piece, utilizes the power of two kinds of directions, improves anchor clamps centre gripping precision.
Further, the cross universal shaft is connected with the inner surface of the protective shell; the cross universal shaft is connected to transmission shaft one end, and the cylindric lock, clamp mouth and briquetting are connected gradually to the other end, drive through cross universal shaft and transmission shaft and press from both sides mouth and briquetting and remove, adjust the height of briquetting through expanding spring, and then utilize the different angles and the height of clamp mouth and briquetting to process the work piece.
Furthermore, a torque adjusting screw and a torque transmission steel ball are arranged, the torque is transmitted to the torque transmission steel ball by moving the torque adjusting screw, and then the clamping mouth is moved, so that clamping of workpieces to be processed at different angles is realized.
Furthermore, a limiting block is fixed on the operation bedplate through a bolt and a nut, and further the workpiece to be processed is fixed through the limiting effect of the limiting block.
Furthermore, at least two threaded through holes are formed in each limiting block, and bolts are installed in the different bolt through holes to adapt to workpieces of different sizes, so that the clamping of the clamp on the workpieces of different sizes can be realized.
Furthermore, the first clamping jaw and the second clamping jaw are driven to rotate to an angle matched with the clamp head by rotating the rotating shaft, and one clamp can be matched with clamp heads with various sizes; simultaneously, make more agreeing with between anchor clamps head and the fixation clamp through the slipmat, improve the precision of processing.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a clamp head structure according to the present invention;
FIG. 3 is a schematic view of the workpiece holder of the present invention;
FIG. 4 is a schematic view of the fixing clip of the present invention;
fig. 5 is the schematic view of the structure of the waste removing bin of the present invention.
Wherein: 1-operating the bedplate; 2-a support seat; 3-workpiece fixing seat; 31-a bolt; 32-a nut; 33-bolt through holes; 4-fixing clips; 41-rotation axis; 42-a first jaw; 43-a second jaw; 44-a non-slip mat; 5-a waste removal bin; 51-a suction head; 52-fixed column; 53-straw; 54-a fan; 55-a filter screen; 56-waste holding box; 57-exhaust pipe; 6-a clamp head; 7-a crank connecting block; 8-oblique guide pulley; 9-vertical guide pulleys; 10-anti-slip operating handle; 11-non-slip support legs; 12-a taper shank; 13-torque adjustment screw; 14-torque transmission steel balls; 15-a cross cardan shaft; 16-a drive shaft; 17-a telescopic spring; 18-a driven sleeve; 19-cylindrical pin; 20-protective shell; 21-a clamping nozzle; and (22) briquetting.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model relates to an anchor clamps for machine tool machining, including operation platen 1 and supporting seat 2, 1 upper surface left side fixedly connected with supporting seat 2 of operation platen, 2 upper surface rotation of supporting seat connect crank connecting block 7, 7 left side fixedly connected with anti-skidding operating handle 10 of crank connecting block, 7 right side skin weld of crank connecting block have fixation clamp 4, 4 internal surface rotation of fixation clamp are connected with anchor clamps head 6, 1 upper surface middle part welding of operation platen has work piece fixing base 3, 1 upper surface right side detachable be connected with the storehouse of removing waste 5 of operation platen, 1 lower surface four corners of operation platen all welds anti-skidding supporting leg 11. 7 surperficial left sides of crank connecting block are rotated and are connected with oblique guide pulley 8, and 7 surperficial right sides of crank connecting block are rotated and are connected with vertical guide pulley 9, and the other end that pulley 8 and vertical guide pulley 9 were led in the slant all is connected with supporting seat 2, drives through the external force and leads the pulley removal, and then drives the removal of anchor clamps head, utilizes the transmission of dual gravity, improves the precision of anchor clamps.
Referring to fig. 2, the fixture head includes taper shank 12, the surface welding of 12 lower parts of taper shank has protective housing 20, fixedly connected with cross universal shaft 15 in protective housing 20, the lower surface of cross universal shaft 15 rotates and is connected with transmission shaft 16, the detachable expanding spring 17 that is connected with of 16 surfaces of transmission shaft, the outer fixed surface of expanding spring 17 is connected with driven cover 18, driven cover 18 is used for protecting expanding spring 17, fixedly connected with cylindric lock 19 under the transmission shaft 16, the surface welding of 19 lower surfaces of cylindric lock has clamp mouth 21, the detachable briquetting 22 that is connected with of 21 lower parts of clamp mouth, drive clamp mouth 21 and briquetting 22 through cross universal shaft 15 and transmission shaft 16 and remove, through expanding spring 17 height-adjusting, and then utilize the different angles and the height of clamp mouth 21 and briquetting 22 to process the.
The torque adjusting screw 13 and the torque transmission steel ball 14 are both arranged in a screw hole formed in the protective shell 20, and one end, far away from the torque transmission steel ball 14, of the torque adjusting screw 13 extends out of the screw hole. The surfaces of the left side and the right side of the clamping mouth 21 are rotatably connected with a torque transmission steel ball 14, the torque transmission steel ball 14 is in bolted connection with a torque adjusting screw 13, torque force is transmitted to the torque transmission steel ball 14 by moving the torque adjusting screw 13, a cross universal shaft 15 and a transmission shaft 16 are driven to move, and the clamping angle of the clamp head 6 is adjusted.
Referring to fig. 3, the workpiece fixing seat 3 includes a bolt 31, a nut 32 and a bolt through hole 33, the left and right sides of the upper surface of the workpiece fixing seat 3 are provided with a limiting block, and one end of the bolt 31 sequentially penetrates through the bolt through hole 33 formed in the limiting block, the bottom plate through hole formed in the bottom plate and the operation platen through hole formed in the operation platen 1 to be connected with the nut 32. Three pairs of bolt through holes 33 are formed in each limiting block, and nuts 32 are screwed on through adjusting positions of the bolts 31 installed in the different bolt through holes 33, so that the limiting blocks are suitable for workpieces of different sizes. The mode that adopts two stopper and three pairs of bolt through-holes 33 in this embodiment is implemented, and in order to adapt to specific processing work piece, the change of adaptability can all be done to the specific quantity of stopper and the quantity of seting up bolt through-holes 33 on the stopper to in order to carry out better work piece centre gripping.
Referring to fig. 4, the fixing clamp 4 includes a rotating shaft 41, a first clamping jaw 42, a second clamping jaw 43 and a non-slip mat 44, the crank connecting block 7 is connected to one end of the rotating shaft 41, the first clamping jaw 42 is welded to the upper surface of the right side of the other end of the rotating shaft, the second clamping jaw 43 is welded to the lower surface of the right side of the rotating shaft 41, the non-slip mat 44 is adhered to the surfaces of the first clamping jaw 42 and the second clamping jaw 43, the rotating shaft 41 is rotated to drive the first clamping jaw 42 and the second clamping jaw 43 to rotate to an angle matched with the clamp head 6, and meanwhile, the clamp head 6 and the fixing clamp 4.
Referring to fig. 5, it includes suction head 51 to remove useless storehouse 5, fixed column 52, straw 53, fan 54, filter screen 55, box 56 and blast pipe 57 are placed to the waste material, it has straw 53 to remove the inside sliding connection in useless storehouse 5, the welding of straw 53 left side has suction head 51, straw 53 right side fixedly connected with fan 54, box 56 is placed to fan 54 fixedly connected with waste material, the welding of box upper portion is placed to the waste material has blast pipe 57, fixed column 52 welds at removing useless storehouse 5 upper surface, the detachable connection of filter screen 55 is at the box 56 internal surface of placing to the waste material, it adsorbs the waste material that appears in the course of working through straw 53 to drive suction head 51 through fan 54, it fixes suction pipe 53 through fixed column 52 to transport to waste material place box 56 storage, rethread filter screen 55 guarantees that waste material granule.
The utility model discloses a theory of operation:
in actual operation, an operator firstly adjusts the positions of the bolts 31 installed in the different bolt through holes 33, and then screws the nuts 32 to fix a workpiece; then, the rotating shaft 41 is rotated to drive the first clamping jaw 42 and the second clamping jaw 43 to rotate to an angle matched with the clamp head 6, and meanwhile, the clamp head 6 and the fixing clamp 4 are more matched through the anti-skid pad 44; meanwhile, torque force is transmitted to a torque transmission steel ball 14 through a torque adjusting screw 13, a cross universal shaft 15 and a transmission shaft 16 in the movable clamp head 6, the height is adjusted through a telescopic spring 17, and a proper angle and height are selected through a clamping mouth 21 and a metal pressing block 22; reciprocate anti-skidding operating handle 10 through external force and drive oblique guide pulley 8 and vertical guide pulley 9 and remove and transmit power to anchor clamps head 6, process the work piece, utilize fan 54 to drive suction head 51 simultaneously and adsorb the wastes material that appears in with the course of working through straw 53, transport to the waste material and place box 56 and store, rethread filter screen 55's filtration guarantees that the wastes material can not spill the waste material and place box 56, guarantees that anchor clamps are not influenced at the course of working.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (10)
1. A clamp for machine tool machining is characterized by comprising an operation bedplate (1), a supporting seat (2), a workpiece fixing seat (3), a fixing clamp (4), a clamp head (6) and a crank connecting block (7);
one end of the upper surface of the operation bedplate (1) is connected with the supporting seat (2), and the other end is connected with the workpiece fixing seat (3); crank connecting block (7) and supporting seat (2) upper surface rotate to be connected, and fixation clamp (4) and anchor clamps head (6) are connected gradually to crank connecting block (7) one end, and the space that anchor clamps head (6) bottom and work piece fixing base (3) top formed is used for the fixed work piece of waiting to process.
2. The jig for machine tool machining according to claim 1, further comprising a waste removing bin (5) for removing machining waste, wherein the waste removing bin (5) is detachably connected to the upper surface of the operating platen (1), and the waste removing bin (5) is located on the side of the workpiece fixing base (3) away from the supporting base (2).
3. The jig for machine tool machining according to claim 2, wherein the waste removing bin (5) comprises a suction head (51), a fixed column (52), a suction pipe (53), a fan (54), a filter screen (55), a waste placing box (56), an exhaust pipe (57) and a bin body;
the suction head (51) is arranged at one end, close to the workpiece fixing seat (3), of the upper surface of the bin body, and the exhaust pipe (57) is arranged at one end, far away from the workpiece fixing seat (3), of the upper surface of the bin body; the suction head (51) is sequentially connected with a suction pipe (53), a fan (54), a waste material placing box (56) and an exhaust pipe (57); the filter screen (55) is positioned in the waste material placing box (56) and connected with the inner surface of the waste material placing box (56), and the filter screen (55) is positioned above the connection part of the fan (54) and the waste material placing box (56); one end of the fixed column (52) is connected with the suction head (51), and the other end is connected with the upper surface of the bin body.
4. The jig for machine tool working according to claim 1, further comprising an anti-slip operation handle (10) and a plurality of anti-slip support legs (11);
the anti-skid operating handle (10) is connected with one end of the crank connecting block (7) far away from the fixing clamp (4), and the anti-skid supporting legs (11) are fixedly connected with the lower surface of the operating bedplate (1).
5. The jig for machine tool machining according to claim 1, further comprising an oblique guide pulley (8) and a vertical guide pulley (9), wherein one end of each of the oblique guide pulley (8) and the vertical guide pulley (9) is connected to the crank connecting block (7), and the other end thereof is connected to the support base (2).
6. The jig for machine tool machining according to any one of claims 1 to 5, characterized in that the jig head (6) includes a taper shank (12), a cross universal shaft (15), a transmission shaft (16), a cylindrical pin (19), a protective shell (20), a clamping mouth (21), and a pressing block (22);
the outer surface of the taper shank (12) is connected with the fixing clamp (4), and the bottom end of the taper shank (12) is connected with the protective shell (20); the cross universal shaft (15) is connected with the inner surface of the protective shell (20); one end of the transmission shaft (16) is connected with the cross universal shaft (15), and the other end is sequentially connected with the cylindrical pin (19), the clamping mouth (21) and the pressing block (22); the transmission shaft (16) is sleeved with an extension spring (17), and the extension spring (17) is sleeved with a driven sleeve (18); one end of the clamping mouth (21) connected with the pressing block (22) extends out of the protective shell (20).
7. The clamp for machine tool machining according to claim 6, wherein a plurality of screw holes are formed in the protective shell (20), a torque adjusting screw (13) and a torque transmission steel ball (14) are arranged in each screw hole, one end of each torque transmission steel ball (14) is connected with the clamping mouth (21), and the other end of each torque transmission steel ball is connected with the torque adjusting screw (13); one end of the torque adjusting screw (13) far away from the torque transmission steel ball (14) extends out of the screw hole.
8. The jig for machine tool machining according to any one of claims 1 to 5, wherein the workpiece fixing base (3) comprises a base plate, a plurality of stoppers, a plurality of bolts (31), and a plurality of nuts (32);
the plurality of limiting blocks are connected with the upper surface of the bottom plate, and the lower surface of the bottom plate is connected with the upper surface of the operation bedplate (1); one end of a bolt (31) sequentially penetrates through a bolt through hole (33) formed in the limiting block, a bottom plate through hole formed in the bottom plate and an operation platen through hole formed in the operation platen (1) to be connected with a nut (32).
9. The jig for machine tool machining according to claim 8, wherein at least two bolt through holes (33) are provided in each stopper.
10. The jig for machine tool machining according to any one of claims 1 to 5, wherein the fixing clip (4) includes a rotating shaft (41), a first jaw (42), a second jaw (43), and a non-slip pad (44);
one end of the rotating shaft (41) is connected with the crank connecting block (7), and the other end of the rotating shaft is connected with the first clamping jaw (42) and the second clamping jaw (43); one side of the anti-skid pad (44) is connected with the inner walls of the first clamping jaw (42) and the second clamping jaw (43) in an adhering mode, and the other side of the anti-skid pad is connected with the outer surface of the clamp head (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920739025.1U CN209902722U (en) | 2019-05-22 | 2019-05-22 | Clamp for machine tool machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920739025.1U CN209902722U (en) | 2019-05-22 | 2019-05-22 | Clamp for machine tool machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209902722U true CN209902722U (en) | 2020-01-07 |
Family
ID=69048945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920739025.1U Expired - Fee Related CN209902722U (en) | 2019-05-22 | 2019-05-22 | Clamp for machine tool machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209902722U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959091A (en) * | 2021-03-16 | 2021-06-15 | 李冬春 | High-end equipment is made and is used mechanical support bracket |
-
2019
- 2019-05-22 CN CN201920739025.1U patent/CN209902722U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959091A (en) * | 2021-03-16 | 2021-06-15 | 李冬春 | High-end equipment is made and is used mechanical support bracket |
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| GR01 | Patent grant | ||
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Granted publication date: 20200107 Termination date: 20210522 |