CN213319995U - Excavator engine bonnet processing clamping anchor clamps - Google Patents

Excavator engine bonnet processing clamping anchor clamps Download PDF

Info

Publication number
CN213319995U
CN213319995U CN202022121160.5U CN202022121160U CN213319995U CN 213319995 U CN213319995 U CN 213319995U CN 202022121160 U CN202022121160 U CN 202022121160U CN 213319995 U CN213319995 U CN 213319995U
Authority
CN
China
Prior art keywords
plate
gear
shaped frame
screw
shaped
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.)
Expired - Fee Related
Application number
CN202022121160.5U
Other languages
Chinese (zh)
Inventor
唐仁俊
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.)
Yangzhou Jinyada Sheet Metal Manufacturing Co ltd
Original Assignee
Yangzhou Jinyada Sheet Metal Manufacturing 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 Yangzhou Jinyada Sheet Metal Manufacturing Co ltd filed Critical Yangzhou Jinyada Sheet Metal Manufacturing Co ltd
Priority to CN202022121160.5U priority Critical patent/CN213319995U/en
Application granted granted Critical
Publication of CN213319995U publication Critical patent/CN213319995U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Jigs For Machine Tools (AREA)

Abstract

The utility model discloses a clamping fixture for machining an engine hood of an excavator, which comprises a bottom plate, a height adjusting structure and a pressing and fixing structure; a bottom plate: an L-shaped plate is arranged in the middle of the front side of the upper surface of the L-shaped plate, a gear is rotatably connected between a transverse plate body of the L-shaped plate and the upper surface of the bottom plate through a bearing, a gear motor output shaft arranged on the upper surface of the L-shaped plate is fixedly connected with a rotating shaft at the upper end of the gear, a U-shaped frame is arranged on the upper surface of the bottom plate, sliding openings are symmetrically arranged at the lower ends of the left side surface and the right side surface of the U-shaped; this excavator engine bonnet processing clamping anchor clamps can satisfy the not processing demand of co-altitude, can also press to hold fixedly engine bonnet, prevents that engine bonnet from taking place the skew in the course of working and influencing processingquality, can prevent to place the board and receive the influence of top pressure and glide in the course of the work, stability when can also guaranteeing the clamp plate and push down.

Description

Excavator engine bonnet processing clamping anchor clamps
Technical Field
The utility model relates to an excavator technical field specifically is an excavator engine bonnet processing clamping anchor clamps.
Background
An excavator, also known as an excavating machine (excavating excavator), is an earth moving machine which excavates materials higher or lower than a bearing surface by using a bucket and loads the materials into a transport vehicle or unloads the materials to a stockyard, wherein the materials excavated by the excavator mainly comprise soil, coal, silt, soil after pre-loosening and rock. In view of the development of construction machines in recent years, the development of excavators is relatively fast, the excavator becomes one of the most important construction machines in construction, and the excavator has three most important parameters: the operation weight (quality), engine power and scraper bowl fill volume, excavator need be equipped with the aircraft bonnet to self engine when putting into use, and in the course of working of aircraft bonnet, need fix the aircraft bonnet earlier, and current excavator engine bonnet processing clamping anchor clamps can't adjust its fixed position usually, can not satisfy the not processing demand of co-altitude, consequently, in order to solve above-mentioned problem, we have designed an excavator engine bonnet processing clamping anchor clamps.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide an excavator engine bonnet processing clamping anchor clamps, can satisfy the processing demand of co-altitude not, can also press to hold fixedly to the engine bonnet, prevent that the engine bonnet from taking place the skew and influencing processingquality in the course of working, can prevent to place the board and receive the influence of top pressure and glide in the course of working, stability when can also guaranteeing the clamp plate and push down can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: a clamping fixture for machining an engine hood of an excavator comprises a bottom plate, a height adjusting structure and a pressing and fixing structure;
a bottom plate: an L-shaped plate is arranged in the middle of the front side of the upper surface of the L-shaped plate, a gear is rotatably connected between a transverse plate body of the L-shaped plate and the upper surface of the bottom plate through a bearing, a gear motor output shaft arranged on the upper surface of the L-shaped plate is fixedly connected with a rotating shaft at the upper end of the gear, a U-shaped frame is arranged on the upper surface of the bottom plate, sliding openings are symmetrically arranged at the lower ends of the left side surface and the right side surface of the U-shaped;
the height adjusting structure comprises: the height adjusting structure is arranged at the center of the upper surface of the bottom plate, is in meshed connection with the gear, is in sliding connection with the sliding opening and extends to the outer side of the U-shaped frame;
pressing and fixing structure: is arranged inside the U-shaped frame;
wherein: still include the control switch group, the control switch group sets up in the upper surface right side of bottom plate, and external power source is connected to the input electricity of control switch group, and gear motor's input electricity connection control switch group's output can satisfy the not processing demand of co-altitude, can also press to hold fixedly engine bonnet, prevents that engine bonnet from taking place the skew and influencing processingquality in the course of working, can prevent to place the board and receive the influence of top pressure and glide in the course of the work, can also guarantee the stability when clamp plate pushes down.
Further, the altitude mixture control structure includes an internal thread section of thick bamboo, tooth, lifting screw, places board and deflector, an internal thread section of thick bamboo passes through the flat bearing and rotates to be connected in the upper surface center department of bottom plate, and the extrados bottom of an internal thread section of thick bamboo is equipped with evenly distributed's tooth, and the tooth all is connected with gear engagement, and the inside threaded connection of an internal thread section of thick bamboo has lifting screw, and lifting screw's top fixedly connected with places the board, and the left and right sides symmetry of placing the board is equipped with the deflector, and the deflector extends to the outside of U-shaped frame with the sliding opening sliding connection who corresponds, can satisfy the not processing demand of co-altitude.
Further, press and hold fixed knot and construct including the connecting plate, press and hold the screw rod, screw motor, activity kicking block, clamp plate and trapezoidal platform, the symmetry sets up in the horizontal support body bottom surface of U-shaped frame around the connecting plate, it holds the screw rod to rotate to be connected with the pressure through the bearing between the connecting plate of both sides, the screw motor output shaft that the connecting plate leading flank of front side set up with press the front end fixed connection who holds the screw rod, press and hold screw threaded connection of screw rod and activity kicking block upper end, sliding connection has the clamp plate in the spout of the vertical support body upper end of U-shaped frame, the upper surface of clamp plate is equipped with trapezoidal platform, the bottom of activity kicking block and the spout sliding connection on trapezoidal platform inclined plane, the output of control switch group is connected to screw motor's input electricity, can press and hold fixedly to the.
Further, the limiting plate of symmetry around all being equipped with in side bottom about the U-shaped frame, the sliding port is located between two limiting plates of front and back homonymy, and the middle part of limiting plate all is equipped with evenly distributed's spacing hole, spacing in proper order with around on two limiting plates of homonymy correspond spacing hole peg graft, can provide limiting displacement for the deflector, prevent to place the board and receive the influence of top pressure and glide in the course of the work.
Further, the bottom surface of U-shaped frame is equipped with bilateral symmetry's sleeve, and the equal sliding connection in telescopic inside has the loop bar, and telescopic bottom surface edge all is equipped with cup joints in the outside spring of loop bar, and the bottom of spring all is connected with the last fixed surface of clamp plate, can provide the direction supporting role for the clamp plate, guarantees the stability when clamp plate pushes down.
Compared with the prior art, the beneficial effects of the utility model are that: this excavator engine bonnet processing clamping anchor clamps has following benefit:
1. use the bolt to pass through the mounting hole and be connected bottom plate and installation site, realize the fixed to the top structure, regulation and control through control switch group, gear motor operates according to the height of outside processing equipment, drive gear revolve, because the tooth all is connected with gear engagement, the inside threaded connection of internal thread section of thick bamboo has lifting screw, deflector and the sliding opening sliding connection who corresponds, thereby the gear drives internal thread section of thick bamboo and rotates and make lifting screw rise, can highly adjust placing the board, satisfy the not processing demand of co-altitude, after the altitude mixture control is accomplished, peg graft spacing and the spacing hole that corresponds on two limiting plates of homonymy around in proper order, make spacing provide limiting displacement for the deflector, prevent to place the board and receive the influence of top pressure and glide in the course of the work.
2. Subsequently, place the upper surface of placing the board with engine bonnet, regulation and control through control switch group, screw motor operation, the drive is pressed and is held the screw rod and rotate, because press and hold screw rod and the screw threaded connection of activity kicking block upper end, sliding connection has the clamp plate in the spout of the vertical support body upper end of U-shaped frame, the bottom of activity kicking block and the spout sliding connection on trapezoidal platform inclined plane, can promote the clamp plate and push down to press and hold fixedly engine bonnet, prevent that engine bonnet from taking place the skew and influencing processingquality in the course of working, sleeve and loop bar receive the tensile influence of spring elasticity can provide the direction supporting role for the clamp plate, guarantee the stability when clamp plate pushes down.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is the right side view internal cut structure schematic diagram of the utility model.
In the figure: the device comprises a base plate 1, a 2L-shaped plate, a 3 gear motor, a 4 gear, a 5 height adjusting structure, a 51 internal thread cylinder, 52 teeth, 53 lifting screws, a 54 placing plate, a 55 guide plate, a 6U-shaped frame, a 7 pressing and fixing structure, a 71 connecting plate, a 72 pressing and holding screw, a 73 screw motor, a 74 movable top block, a 75 pressing plate, a 76 trapezoidal table, an 8 control switch group, a 9 sliding opening, a 10 mounting hole, a 11 limiting plate, a 12 limiting hole, a 13 limiting strip, a 14 sleeve, a 15 loop rod and a 16 spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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 work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a clamping fixture for machining an engine hood of an excavator comprises a bottom plate 1, a height adjusting structure 5 and a pressing and fixing structure 7;
bottom plate 1: the middle part of the front side of the upper surface of the L-shaped plate 2 is provided with the L-shaped plate 2, a gear 4 is rotatably connected between the transverse plate body of the L-shaped plate 2 and the upper surface of the bottom plate 1 through a bearing, an output shaft of a gear motor 3 arranged on the upper surface of the L-shaped plate 2 is fixedly connected with a rotating shaft at the upper end of the gear 4, the upper surface of the bottom plate 1 is provided with a U-shaped frame 6, the lower ends of the left side surface and the right side surface of the U-shaped frame 6 are symmetrically provided with sliding openings 9, four corners of the bottom plate 1 are symmetrically provided with mounting holes 10, and the;
height adjustment structure 5: the height adjusting structure 5 is connected with the gear 4 in a meshing manner, the height adjusting structure 5 is connected with the sliding port 9 in a sliding manner and extends to the outer side of the U-shaped frame 6, the height adjusting structure 5 comprises an internal thread cylinder 51, teeth 52, lifting screws 53, a placing plate 54 and guide plates 55, the internal thread cylinder 51 is rotatably connected with the center of the upper surface of the bottom plate 1 through a plane bearing, the uniformly distributed teeth 52 are arranged at the bottom end of the outer arc surface of the internal thread cylinder 51, the teeth 52 are all connected with the gear 4 in a meshing manner, the lifting screws 53 are connected with the internal threads of the internal thread cylinder 51, the placing plate 54 is fixedly connected with the top end of the lifting screws 53, the guide plates 55 are symmetrically arranged on the left side and the right side of the placing plate 54, the guide plates 55 are connected with the corresponding sliding ports 9 in a sliding manner and extend to the outer side of the U-shaped frame 6, and the gear motor 3 operates according to the, the gear 4 is driven to rotate, the teeth 52 are all meshed with the gear 4, the lifting screw 53 is connected to the inner thread of the internal thread cylinder 51, the guide plate 55 is connected with the corresponding sliding opening 9 in a sliding mode, the gear 4 drives the internal thread cylinder 51 to rotate, so that the lifting screw 53 is lifted, the height of the placing plate 54 can be adjusted, and machining requirements of different heights are met;
pressing and fixing structure 7: the pressing and fixing structure 7 comprises a connecting plate 71, a pressing and holding screw 72, a screw motor 73, a movable top block 74, a pressing plate 75 and a trapezoidal table 76, the connecting plate 71 is symmetrically arranged on the bottom surface of the transverse frame body of the U-shaped frame 6 in the front-back direction, the pressing and holding screw 72 is rotatably connected between the connecting plates 71 on two sides through a bearing, an output shaft of the screw motor 73 arranged on the front side surface of the connecting plate 71 on the front side is fixedly connected with the front end of the pressing and holding screw 72, the pressing and holding screw 72 is in threaded connection with a screw hole at the upper end of the movable top block 74, the pressing plate 75 is in sliding connection with a sliding groove at the upper end of the vertical frame body of the U-shaped frame 6, the trapezoidal table 76 is arranged on the upper surface of the pressing plate 75, the bottom end of the movable top block 74 is in sliding connection with the sliding groove at the inclined surface, through the regulation and control of the control switch group 8, the screw motor 73 operates to drive the pressing and holding screw 72 to rotate, the pressing and holding screw 72 is in threaded connection with a screw hole at the upper end of the movable top block 74, the pressing plate 75 is in sliding connection with a sliding groove at the upper end of the vertical frame body of the U-shaped frame 6, the bottom end of the movable top block 74 is in sliding connection with a sliding groove on the inclined surface of the trapezoidal table 76, the pressing plate 75 can be pushed to press and hold and fix the engine hood, and the engine hood is prevented from being deviated in the machining process to influence;
wherein: still include control switch group 8, control switch group 8 sets up in the upper surface right side of bottom plate 1, and external power source is connected to control switch group 8's input electricity, and gear motor 3's input electricity connects control switch group 8's output.
Wherein: the limiting plate 11 of symmetry around all being equipped with in the side bottom about U-shaped frame 6, smooth mouthful 9 is located between two limiting plates 11 of front and back homonymy, the middle part of limiting plate 11 all is equipped with evenly distributed's spacing hole 12, spacing 13 in proper order with around on two limiting plates 11 of homonymy correspond spacing hole 12 peg graft, after the altitude mixture control is accomplished, peg graft spacing 13 with in proper order with around on two limiting plates 11 of homonymy spacing hole 12 that correspond, make spacing 13 provide limiting displacement for deflector 55, prevent to place board 54 and receive the influence of top pressure and glide in the course of the work.
Wherein: the bottom surface of U-shaped frame 6 is equipped with bilateral symmetry's sleeve 14, and the equal sliding connection in inside of sleeve 14 has loop bar 15, and the bottom surface edge of sleeve 14 all is equipped with cup joints in the outside spring 16 of loop bar 15, and the bottom of spring 16 all is connected with the last fixed surface of clamp plate 75, and sleeve 14 and loop bar 15 receive the tensile influence of spring 16 elasticity can provide the direction supporting role for clamp plate 75, stability when guaranteeing clamp plate 75 to push down.
When in use: the bottom plate 1 is connected with the installation part through the installation hole 10 by using bolts to realize the fixation of the upper structure, the gear motor 3 operates according to the height of external processing equipment by controlling the regulation and control of the switch group 8 to drive the gear 4 to rotate, because the teeth 52 are all meshed and connected with the gear 4, the internal thread of the internal thread cylinder 51 is connected with a lifting screw 53, the guide plate 55 is connected with the corresponding sliding port 9 in a sliding way, the gear 4 drives the internal thread cylinder 51 to rotate so as to lead the lifting screw 53 to rise, the height of the placing plate 54 can be adjusted to meet the processing requirements of different heights, after the height adjustment is finished, the limiting strip 13 is inserted with the corresponding limiting holes 12 on two limiting plates 11 which are sequentially arranged at the same front and back sides, the limiting strip 13 provides a limiting effect for the guide plate 55 to prevent the placing plate 54 from sliding down under the influence of the upper pressure in the working process, and then, the engine hood is placed on the upper, regulation and control through control switch group 8, screw motor 73 operates, it holds screw 72 to drive to press, because press and hold screw 72 and the screw threaded connection on the activity kicking block 74, sliding connection has clamp plate 75 in the spout of the vertical support body upper end of U-shaped frame 6, the bottom of activity kicking block 74 and the spout sliding connection on trapezoidal platform 76 inclined plane, can promote clamp plate 75 to push down and press to hold fixedly to engine bonnet, prevent that engine bonnet from taking place the skew and influencing processingquality in the course of working, sleeve 14 and loop bar 15 can provide the direction supporting role for clamp plate 75 by the tensile influence of spring 16 elasticity, stability when guaranteeing clamp plate 75 to push down.
It should be noted that the gear motor 3 and the screw motor 73 disclosed in this embodiment are both 7.9KW dc servo motors manufactured by demark motor limited, guangzhou city, and the control switch group 8 controls the gear motor 3 and the screw motor 73 to work by a method commonly used in the prior art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides an excavator engine bonnet processing clamping anchor clamps which characterized in that: comprises a bottom plate (1), a height adjusting structure (5) and a pressing and fixing structure (7);
base plate (1): an L-shaped plate (2) is arranged in the middle of the front side of the upper surface of the L-shaped plate, a gear (4) is rotatably connected between a transverse plate body of the L-shaped plate (2) and the upper surface of a bottom plate (1) through a bearing, an output shaft of a gear motor (3) arranged on the upper surface of the L-shaped plate (2) is fixedly connected with a rotating shaft at the upper end of the gear (4), a U-shaped frame (6) is arranged on the upper surface of the bottom plate (1), sliding openings (9) are symmetrically arranged at the lower ends of the left side surface and the right side surface of the U-shaped frame (6);
height adjustment structure (5): the height adjusting structure (5) is arranged at the center of the upper surface of the bottom plate (1), is meshed with the gear (4), is connected with the sliding opening (9) in a sliding manner and extends to the outer side of the U-shaped frame (6);
pressing and fixing structure (7): is arranged inside the U-shaped frame (6);
wherein: still include control switch group (8), control switch group (8) set up in the upper surface right side of bottom plate (1), and external power source is connected to the input electricity of control switch group (8), and the output of control switch group (8) is connected to the input electricity of gear motor (3).
2. The excavator engine hood machining clamping fixture as claimed in claim 1, characterized in that: the height adjusting structure (5) comprises an internal thread cylinder (51), teeth (52), a lifting screw (53), a placing plate (54) and a guide plate (55), the internal thread cylinder (51) is rotatably connected to the center of the upper surface of the bottom plate (1) through a plane bearing, the teeth (52) which are uniformly distributed are arranged at the bottom end of the outer arc surface of the internal thread cylinder (51), the teeth (52) are all meshed with the gear (4) to be connected, the lifting screw (53) is connected to the internal thread of the internal thread cylinder (51), the placing plate (54) is fixedly connected to the top end of the lifting screw (53), the guide plate (55) is symmetrically arranged on the left side surface and the right side surface of the placing plate (54), and the guide plate (55) is connected with the corresponding sliding opening (9) in a sliding mode and extends to the outer side of the.
3. The excavator engine hood machining clamping fixture as claimed in claim 1, characterized in that: the pressing and fixing structure (7) comprises a connecting plate (71), a pressing screw (72), a screw motor (73), a movable top block (74), a pressing plate (75) and a trapezoidal table (76), the connecting plate (71) front and back symmetry sets up in the horizontal support body bottom surface of U-shaped frame (6), it holds screw rod (72) to rotate to be connected with through the bearing between connecting plate (71) of both sides and press, screw motor (73) output shaft that connecting plate (71) leading flank of front side set up and the front end fixed connection who holds screw rod (72) are pressed, press and hold screw rod (72) and the screw threaded connection on movable kicking block (74), sliding connection has clamp plate (75) in the spout of the vertical support body upper end of U-shaped frame (6), the upper surface of clamp plate (75) is equipped with trapezoidal platform (76), the bottom and the spout sliding connection on trapezoidal platform (76) inclined plane of movable kicking block (74), the output of control switch group (8) is connected to the input electricity of screw motor (73).
4. The excavator engine hood machining clamping fixture as claimed in claim 1, characterized in that: the limiting plates (11) which are symmetrical in the front and back are arranged at the bottom ends of the left side and the right side of the U-shaped frame (6), the sliding port (9) is located between the two limiting plates (11) on the front side and the back side, the middle parts of the limiting plates (11) are provided with uniformly distributed limiting holes (12), and the limiting strips (13) are sequentially connected with the corresponding limiting holes (12) on the two limiting plates (11) on the front side and the back side in an inserting mode.
5. The excavator engine hood machining clamping fixture as claimed in claim 3, characterized in that: the bottom surface of U-shaped frame (6) is equipped with bilateral symmetry's sleeve (14), and the equal sliding connection in inside of sleeve (14) has loop bar (15), and the bottom surface edge of sleeve (14) all is equipped with and cup joints in the outside spring (16) of loop bar (15), and the bottom of spring (16) all is connected with the last fixed surface of clamp plate (75).
CN202022121160.5U 2020-09-24 2020-09-24 Excavator engine bonnet processing clamping anchor clamps Expired - Fee Related CN213319995U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022121160.5U CN213319995U (en) 2020-09-24 2020-09-24 Excavator engine bonnet processing clamping anchor clamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022121160.5U CN213319995U (en) 2020-09-24 2020-09-24 Excavator engine bonnet processing clamping anchor clamps

Publications (1)

Publication Number Publication Date
CN213319995U true CN213319995U (en) 2021-06-01

Family

ID=76066939

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022121160.5U Expired - Fee Related CN213319995U (en) 2020-09-24 2020-09-24 Excavator engine bonnet processing clamping anchor clamps

Country Status (1)

Country Link
CN (1) CN213319995U (en)

Similar Documents

Publication Publication Date Title
CN210453141U (en) Adjusting support for assembling and mounting building templates
CN213319995U (en) Excavator engine bonnet processing clamping anchor clamps
CN211773797U (en) Water conservancy construction cofferdam device
CN113719732A (en) Outdoor slope automatic balancing equipment
CN212294801U (en) Grooving device for building convenient to adjust
CN117513327A (en) Auxiliary equipment for applying and driving U-shaped concrete sheet pile
CN209620546U (en) A kind of construction support frame
CN217432847U (en) Multifunctional metal plate machining center positioning device
CN215920945U (en) Pile tip cutting device for prestressed concrete pipe pile
CN213497689U (en) Strutting arrangement for machining
CN210265354U (en) Be used for excavator hydro-cylinder flaw to detect and use operation panel
CN210948535U (en) Deviation device is prevented with probing to geotechnical engineering reconnaissance
CN212388992U (en) Assembled building templates fixing device
CN210305168U (en) Hydraulic plate bending machine
CN211080249U (en) A be convenient for adjust formula supporting construction for construction
CN210412729U (en) Cross groove slotting device for bar grinding
CN210232865U (en) Mounting rack for excavator component
CN112854782A (en) Safe and efficient wall building device for building construction
CN215047981U (en) Prefabricated component hoist and mount hoist for construction
CN210797695U (en) Earth excavation tunneling gradient adjusting device
CN218091012U (en) Can replace artifical clear groove device of machine of digging
CN217106182U (en) Basement outer wall body formwork support
CN218467633U (en) Fully-mechanized excavation inclined roadway cross-level roadway right-angle intersection point construction supporting device
CN210860547U (en) Adjustable mounting bracket for loader working condition monitoring equipment
CN215101705U (en) Jacking device for machining of mechanical workpiece

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210601