CN210216417U - Pile driver - Google Patents

Pile driver Download PDF

Info

Publication number
CN210216417U
CN210216417U CN201920977647.8U CN201920977647U CN210216417U CN 210216417 U CN210216417 U CN 210216417U CN 201920977647 U CN201920977647 U CN 201920977647U CN 210216417 U CN210216417 U CN 210216417U
Authority
CN
China
Prior art keywords
movable part
pile
hole
bottom plate
soil drilling
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
CN201920977647.8U
Other languages
Chinese (zh)
Inventor
Wenchao Wang
王文超
Zijian Yao
姚子健
Fang Chen
陈芳
Shengke Cai
蔡胜科
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.)
Dongguan Broad Canal Construction Engineering Co Ltd
Original Assignee
Dongguan Broad Canal Construction Engineering 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 Dongguan Broad Canal Construction Engineering Co Ltd filed Critical Dongguan Broad Canal Construction Engineering Co Ltd
Priority to CN201920977647.8U priority Critical patent/CN210216417U/en
Application granted granted Critical
Publication of CN210216417U publication Critical patent/CN210216417U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The utility model relates to a pile driver, which comprises a vehicle body, a frame body and a fixed structure, wherein the frame body is detachably connected with the vehicle body; the frame body is provided with a bottom plate and a pile hammer fixing frame, and the pile hammer fixing frame is arranged above the bottom plate; the pile hammer fixing frame is provided with a pile hammer and a hydraulic pump, and the hydraulic pump is used for driving the pile hammer to move so as to drive the foundation pile hammer into the ground; the bottom plate is provided with a limiting hole for the foundation pile to pass through; the bottom plate is provided with wheels for moving the pile driver, the fixed structure comprises a fixed sleeve, a movable part, a driving mechanism and a soil drilling rod, the fixed structure is connected with the bottom plate through the fixed sleeve, and the movable part is arranged in the fixed sleeve and can extend out of the fixed sleeve through the bottom opening of the fixed sleeve; bore soil pole and actuating mechanism and all set up on movable part, and actuating mechanism is used for the drive to bore soil pole and rotates around self axis, and movable part is used for driving the bottom opening of boring the relative fixed cover of soil pole and stretches out and draws back to bore into ground when stretching out, vibrations make the wheel remove lead to the skew of foundation pile when preventing the pile.

Description

Pile driver
Technical Field
The utility model belongs to the technical field of the technique of architectural equipment and specifically relates to a pile driver is related to.
Background
Pile drivers are widely used and are commonly used in various construction sites.
The existing pile driver is a vehicle-mounted pile driver, and comprises a loader, wherein the loader is provided with a liftable support body, the support body is used for installing a pile hammer fixing frame which is provided with a pile hammer striking structure, a bottom plate is arranged at the bottom of the support body, the bottom plate is provided with a limiting hole to accommodate a pile, wheels are arranged at the bottom of the bottom plate, and the support body is convenient to remove after being detached.
However, in the process of piling, the pile driver vibrates greatly, so that the wheels are easy to move, and the position of the pile is driven to deviate.
Disclosure of Invention
The utility model aims at providing a pile driver mainly lies in solving among the prior art pile driver vibrations great at the pile driving in-process, and the wheel takes place to remove easily, leads to the position of stake to take place the problem of skew.
The above object of the present invention is achieved by the following technical solutions: comprises a vehicle body, a frame body and a fixed structure, wherein the frame body is detachably connected with the vehicle body; the frame body is provided with a bottom plate and a pile hammer fixing frame, and the pile hammer fixing frame is arranged above the bottom plate; the pile hammer fixing frame is provided with a pile hammer and a hydraulic pump, and the hydraulic pump is used for driving the pile hammer to move so as to drive the foundation pile hammer into the ground; the bottom plate is provided with a limiting hole for the foundation pile to pass through; the bottom plate is provided with wheels; the pile driver moves through the wheels; the fixed structure comprises a fixed sleeve, a movable part, a driving mechanism and a soil drilling rod, the fixed structure is connected with the bottom plate through the fixed sleeve, and the movable part is arranged in the fixed sleeve and can extend out of the fixed sleeve through an opening at the bottom of the fixed sleeve; the soil drilling rod and the driving mechanism are arranged on the movable part, the driving mechanism is used for driving the soil drilling rod to rotate around the axis of the driving mechanism, and the movable part is used for driving the bottom opening of the soil drilling rod relative fixing sleeve to stretch out and draw back so as to drill into the ground when the movable part stretches out.
Through adopting above-mentioned technical scheme, the pile hammer mount is installed on the automobile body, so the pile driver can be along with the automobile body motion, it is comparatively convenient, when using the pile driver, dismantle support body and automobile body, the drive movable part drives and bores native pole and stretch out from fixed cover, meanwhile, actuating mechanism drive bores native pole and rotates around self axis, can make more easily bore native pole and enter into soil, the pile hammer mount that will erect the pile hammer is stable subaerial, it makes the wheel remove and leads to the skew of foundation pile to produce vibrations when preventing the pile.
The utility model discloses further set up to: the two opposite inner walls of the fixed sleeve are provided with slide rails; two side surfaces of the movable part, which are deviated from each other, are provided with sliding blocks; the two sliding blocks are correspondingly connected with the two sliding rails one by one; the cylinder is used for driving the movable part to move along the slide rail so as to drive the soil drilling rod to stretch relative to the bottom opening of the fixed sleeve.
Through adopting above-mentioned technical scheme, the cylinder drive movable part motion, movable part moves along the slide rail under the spacing of slide rail to it is flexible to drive the bottom opening that the movable block bored the soil pole relatively fixed cover mutually.
The utility model discloses further set up to: the bottom plate is provided with a through hole, the fixing sleeve is arranged in the through hole, the upper end of the fixing sleeve is lower than the upper end face of the through hole, and the lower end of the fixing sleeve extends out of the lower end opening of the through hole; the piston rod of the cylinder extends into from the upper end opening of the through hole to be connected with the fixed sleeve.
Through adopting above-mentioned technical scheme, fixed cover is installed in the through-hole, and the through-hole can protect fixed cover.
The utility model discloses further set up to: the bottom plate is provided with a cover; the cover comprises two cover plates, one cover plate is hinged with one side of the upper opening of the through hole, and the other cover plate is hinged with the other side of the upper opening of the through hole; the two cover plates are provided with notches, and when the two cover plates are closed relative to the upper end openings of the through holes, the notches on the two cover plates form a position avoiding hole for the piston rod of the air cylinder to be inserted.
Through adopting above-mentioned technical scheme, the apron can protect fixed cover, prevents that fixed cover from damaging, and the setting of breach can be when the apron covers the upper end opening of through-hole, and the cylinder still can normally promote the movable part.
The utility model discloses further set up to: the driving mechanism comprises a motor and a transmission mechanism, the movable part is provided with an accommodating cavity, and the bottom of the movable part is provided with a through hole; the motor is arranged in the accommodating cavity, and an output shaft of the motor extends out of the through hole; the output shaft of the motor is connected with the soil drilling rod through a transmission mechanism so as to drive the soil drilling rod to rotate around the axis of the soil drilling rod.
Through adopting above-mentioned technical scheme, the output shaft of motor passes through drive mechanism and is connected with boring the soil pole, makes the motor drive bore the soil pole and rotate together.
The utility model discloses further set up to: the transmission mechanism comprises a driving gear and a driven gear; the soil drilling rod is rotatably arranged on the movable part; the driving gear is fixedly sleeved on an output shaft of the motor, and the driven gear is fixedly sleeved on the soil drilling rod; the driving gear is meshed with the driven gear.
Through adopting above-mentioned technical scheme, transmission structure passes through the output shaft of driving gear and motor, and the motor during operation, the driving gear rotates under the drive of output shaft, and driven gear and driving gear meshing move together, and then drive and bore the rotation of native pole.
The utility model discloses further set up to: the number of the soil drilling rods is more than two, and the number of the driven gears is equal to that of the soil drilling rods and corresponds to that of the soil drilling rods one to one; the driving gear is meshed with each driven gear.
Through adopting above-mentioned technical scheme, bore the quantity of soil pole and be more than two, PMKD that can be more stable, a action wheel can rotate all from the driving wheel together, makes a motor drive and bores soil pole more than two and rotate together.
The utility model discloses further set up to: the connecting plate is arranged on the movable part and is provided with a groove for accommodating the driving gear and each driven gear; the connecting plate is provided with spacing holes, the number of the spacing holes is consistent with that of the earth drilling rods, and the earth drilling rods correspondingly penetrate through the corresponding spacing holes one to one.
Through adopting above-mentioned technical scheme, each driven gear can be supported to the connecting plate, breaks away from when preventing from the driving wheel rotation.
The utility model discloses further set up to: the soil drilling end of the soil drilling rod is provided with an external thread.
Through adopting above-mentioned technical scheme, when boring the soil pole rotation, the external screw thread can make and bore the soil pole easier entering soil.
To sum up, the utility model discloses a beneficial technological effect does:
1. when the soil drilling rod enters the soil, the pile hammer fixing frame provided with the pile hammer is stabilized on the ground, and the foundation pile is prevented from being deviated due to the fact that the wheels move due to vibration generated during piling.
2. When in use, the earth drilling rod can rotate while extending out of the fixed sleeve, and can enter the earth more easily.
Drawings
Fig. 1 is a schematic view of the overall structure of a pile driver.
FIG. 2 is a schematic view of the fixing structure
In the figure, 1, a vehicle body; 2. a base plate; 21. a wheel; 3. drilling a soil rod; 31. an external thread; 4. a movable part; 41. a slider; 5. fixing a sleeve; 51. a slide rail; 6. a cylinder; 7. a motor; 8. a driving gear; 9. a driven gear; 10. a connecting plate; 11. a cover; 111. and (7) a cover plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. As shown in fig. 1, the pile driver comprises a vehicle body 1, a frame body and a fixed structure, wherein the frame body is detachably connected with the vehicle body 1; the connection mode of the frame body and the vehicle body 1 is the prior art, so the redundant description is not needed, the frame body is provided with a bottom plate 2 and a pile hammer fixing frame, and the pile hammer fixing frame is arranged above the bottom plate 2; the pile hammer fixing frame is provided with a pile hammer and a hydraulic pump, and the hydraulic pump is used for driving the pile hammer to move so as to drive the foundation pile hammer into the ground; the bottom plate 2 is provided with a limiting hole for the foundation pile to pass through; the base plate 2 is provided with wheels 21; the pile driver is moved by wheels 21; as shown in fig. 2, the fixing structure comprises a fixing sleeve 5, a movable part 4, a driving mechanism and a soil drilling rod 3, the fixing structure is connected with the bottom plate 2 through the fixing sleeve 5, and the movable part 4 is arranged in the fixing sleeve 5 and can extend out of the fixing sleeve 5 through the bottom opening of the fixing sleeve 5; bore native pole 3 and actuating mechanism and all set up on movable part 4, and actuating mechanism is used for the drive to bore native pole 3 and is rotatory around self axis, and movable part 4 is used for driving the bottom opening of boring the relative fixed cover 5 of native pole 3 and stretches out and draws back to bore into ground when stretching out. In addition, the pile driver also comprises a cylinder 6, and two opposite inner walls of the fixed sleeve 5 are provided with slide rails 51; the pouch 5 is shaped as shown in fig. 2, in the form of a box, with the opening being arranged below in fig. 2. Two sides of the movable part 4 which are deviated from each other are provided with sliding blocks 41; the two sliding blocks 41 are correspondingly connected with the two sliding rails 51 one by one; the cylinder 6 is used for driving the movable part 4 to move along the slide rail 51 so as to drive the soil drilling rod 3 to extend and retract relative to the bottom opening of the fixed sleeve 5. The bottom plate 2 is provided with a through hole, the fixing sleeve 5 is arranged in the through hole, the upper end of the fixing sleeve 5 is lower than the upper end surface of the through hole, and the lower end of the fixing sleeve 5 extends out of the lower end opening of the through hole; the piston rod of the cylinder 6 extends into the through hole from the upper end opening and is connected with the fixed sleeve 5. The base plate 2 is provided with a cover 11; the cover 11 comprises two cover plates 111, one cover plate 111 is hinged with one side of the upper opening of the through hole, and the other cover plate is hinged with the other side of the upper opening of the through hole; the two cover plates 111 are provided with notches, and when the two cover plates 111 are closed relative to the upper end openings of the through holes, the notches on the two cover plates 111 enclose a position avoiding hole for inserting a piston rod of the cylinder 6. The cover 111 is provided with a lock, which is locked when the cover 111 is closed. The cross-sectional shape of through-hole is T shape, and the opening of upper end is bigger than the lower extreme opening, and the shape of fixed cover 5 is as shown in fig. 2, and the lower part of upper portion is big, so fixed cover 5 can put into the through-hole through the upper end opening and block in the through-hole, and apron 111 can prevent that fixed cover 5 from breaking away from the through-hole.
As shown in fig. 2, the driving mechanism includes a motor 7 and a transmission mechanism, the movable part 4 is provided with an accommodating cavity, and the bottom of the movable part 4 is provided with a through hole; the motor 7 is fixedly arranged in the accommodating cavity, and an output shaft of the motor 7 extends out of the through hole; an output shaft of the motor 7 is connected with the soil drilling rod 3 through a transmission mechanism so as to drive the soil drilling rod 3 to rotate around the axis of the soil drilling rod. The transmission mechanism comprises a driving gear 8 and a driven gear 9; the soil drilling rod 3 is rotatably arranged on the movable part 4; the driving gear 8 is fixedly sleeved on an output shaft of the motor 7, and the driven gear 9 is fixedly sleeved on the soil drilling rod 3; the drive gear 8 meshes with the driven gear 9. The number of the soil drilling rods 3 is more than two, and the number of the driven gears 9 is equal to that of the soil drilling rods 3 and corresponds to one; the driving gear 8 is engaged with each of the driven gears 9. The connecting plate 10 is arranged on the movable part 4, and the connecting plate 10 is provided with a groove for accommodating the driving gear 8 and each driven gear 9; the connecting plate 10 is provided with spacing holes, the number of the spacing holes is consistent with the number of the soil drilling rods 3, and each soil drilling rod 3 penetrates through the corresponding spacing hole in a one-to-one correspondence mode. The earth drilling end of the earth drilling rod 3 is provided with an external thread 31.
Preferably, as shown in fig. 1 and 2, the number of the fixing structures is four, each fixing structure corresponds to one through hole, so the number of the through holes on the bottom plate 2 is also four, each fixing structure comprises a motor 7, a fixing sleeve 5, a movable part 4, a transmission mechanism, three soil drilling rods 3 and a connecting plate 10, one of the transmission mechanisms comprises three driven wheels and a driving wheel, and the driven wheels are uniformly arranged along the circumferential direction of the driving wheel.
The implementation principle of the embodiment is as follows: the pile hammer mount is installed on automobile body 1, so the pile driver can be along with the motion of automobile body 1, it is comparatively convenient, when using the pile driver, dismantle support body and automobile body 1, drive movable part 4 drives and bores native pole 3 and stretch out from fixed cover 5, meanwhile, actuating mechanism drive bores native pole 3 and rotates around self axis, can make more easily bore native pole 3 and enter into soil, the pile hammer mount that will erect the pile hammer is stable subaerial, produce vibrations when preventing the pile and make wheel 21 remove and lead to the skew of foundation pile. The cylinder 6 drives the movable part 4 to move, and the movable part 4 moves along the slide rail 51 under the limit of the slide rail 51 so as to drive the movable block to drill the soil rod 3 relative to the bottom opening of the fixed sleeve 5 to stretch. The fixed cover 5 is arranged in the through hole, and the through hole can protect the fixed cover 5. The cover plate 111 can protect the fixing sleeve 5 and prevent the fixing sleeve 5 from being damaged, and the air cylinder 6 can still normally push the movable part 4 when the cover plate 111 covers the upper end opening of the through hole. And an output shaft of the motor 7 is connected with the soil drilling rod 3 through a transmission mechanism, so that the motor 7 drives the soil drilling rod 3 to rotate together. The transmission structure is connected with an output shaft of the motor 7 through the driving gear 8, when the motor 7 works, the driving gear 8 rotates under the driving of the output shaft, the driven gear 9 is meshed with the driving gear 8 and moves together, and then the soil drilling rod 3 is driven to rotate. The number of the soil drilling rods 3 is more than two, the fixing base plate 2 can be more stable, and one driving wheel can rotate all the driven wheels together, so that one motor 7 drives the soil drilling rods 3 to rotate together. The connecting plate 10 can support each driven gear 9 and prevent the driven gear from disengaging when rotating. The external thread 31 makes it easier for the earth drilling rod 3 to enter the soil when the earth drilling rod 3 is rotated.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (9)

1. A pile driver, characterized by: comprises a vehicle body (1), a frame body and a fixed structure, wherein the frame body is detachably connected with the vehicle body (1);
the frame body is provided with a bottom plate (2) and a pile hammer fixing frame, and the pile hammer fixing frame is arranged above the bottom plate (2);
the pile hammer fixing frame is provided with a pile hammer and a hydraulic pump, and the hydraulic pump is used for driving the pile hammer to move so as to drive the foundation pile hammer into the ground;
the bottom plate (2) is provided with a limiting hole for the foundation pile to pass through;
the bottom plate (2) is provided with wheels (21); the pile driver is moved by the wheel (21);
the fixed structure comprises a fixed sleeve (5), a movable part (4), a driving mechanism and a soil drilling rod (3), the fixed structure is connected with the bottom plate (2) through the fixed sleeve (5), the movable part (4) is arranged in the fixed sleeve (5) and can extend out of the fixed sleeve (5) through the bottom opening of the fixed sleeve (5);
bore native pole (3) and actuating mechanism and all set up on movable part (4), and actuating mechanism is used for the drive to bore native pole (3) and is rotatory around self axis, and movable part (4) are used for driving the bottom opening of boring the relative fixed cover (5) of native pole (3) and stretch out and draw back to bore into ground when stretching out.
2. Pile driver according to claim 1, characterized in that: the device also comprises a cylinder (6), and two opposite inner walls of the fixed sleeve (5) are provided with slide rails (51);
two side surfaces of the movable part (4) which are deviated from each other are provided with sliding blocks (41); the two sliding blocks (41) are correspondingly connected with the two sliding rails (51) one by one;
the cylinder (6) is used for driving the movable part (4) to move along the sliding rail (51) so as to drive the soil drilling rod (3) to stretch relative to the bottom opening of the fixed sleeve (5).
3. Pile driver according to claim 2, characterized in that: the bottom plate (2) is provided with a through hole,
the fixing sleeve (5) is arranged in the through hole, the upper end of the fixing sleeve (5) is lower than the upper end surface of the through hole, and the lower end of the fixing sleeve (5) extends out of the lower end opening of the through hole;
a piston rod of the cylinder (6) extends into the through hole from the upper end opening of the through hole to be connected with the fixed sleeve (5).
4. A pile driver as claimed in claim 3, wherein: the bottom plate (2) is provided with a cover (11);
the cover (11) comprises two cover plates (111), one cover plate (111) is hinged with one side of the upper end opening of the through hole, and the other cover plate is hinged with the other side of the upper end opening of the through hole;
the two cover plates (111) are provided with notches, and when the two cover plates (111) are closed relative to the upper end openings of the through holes, the notches in the two cover plates (111) are surrounded to form a position avoiding hole for inserting a piston rod of the air cylinder (6).
5. Pile driver according to any of claims 1-4, characterized in that: the driving mechanism comprises a motor (7) and a transmission mechanism, the movable part (4) is provided with an accommodating cavity, and the bottom of the movable part (4) is provided with a through hole;
the motor (7) is arranged in the accommodating cavity, and an output shaft of the motor (7) extends out of the through hole;
an output shaft of the motor (7) is connected with the soil drilling rod (3) through a transmission mechanism so as to drive the soil drilling rod (3) to rotate around the axis of the soil drilling rod.
6. Pile driver according to claim 5, characterized in that: the transmission mechanism comprises a driving gear (8) and a driven gear (9); the soil drilling rod (3) is rotatably arranged on the movable part (4);
the driving gear (8) is fixedly sleeved on an output shaft of the motor (7), and the driven gear (9) is fixedly sleeved on the soil drilling rod (3);
the driving gear (8) is meshed with the driven gear (9).
7. Pile driver according to claim 6, characterized in that: the number of the soil drilling rods (3) is more than two, and the number of the driven gears (9) is equal to that of the soil drilling rods (3) and corresponds to that of the soil drilling rods one by one;
the driving gear (8) is meshed with each driven gear (9).
8. Pile driver according to claim 7, characterized in that: the connecting plate (10) is arranged on the movable part (4), and grooves are formed in the connecting plate (10) and used for accommodating the driving gear (8) and each driven gear (9);
the connecting plate (10) is provided with spacing holes, the number of the spacing holes is consistent with that of the earth drilling rods (3), and the earth drilling rods (3) correspondingly penetrate through the corresponding spacing holes one by one.
9. A pile driver as claimed in any one of claims 1 to 4, 6 to 8, wherein: the soil drilling end of the soil drilling rod (3) is provided with an external thread (31).
CN201920977647.8U 2019-06-26 2019-06-26 Pile driver Expired - Fee Related CN210216417U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920977647.8U CN210216417U (en) 2019-06-26 2019-06-26 Pile driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920977647.8U CN210216417U (en) 2019-06-26 2019-06-26 Pile driver

Publications (1)

Publication Number Publication Date
CN210216417U true CN210216417U (en) 2020-03-31

Family

ID=69934292

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920977647.8U Expired - Fee Related CN210216417U (en) 2019-06-26 2019-06-26 Pile driver

Country Status (1)

Country Link
CN (1) CN210216417U (en)

Similar Documents

Publication Publication Date Title
KR200429625Y1 (en) Drilling machine having drifter rotating in 360 degree
CN210216417U (en) Pile driver
CN220415284U (en) High-pressure jet grouting pile inserted small steel pipe enclosure structure
CN112324327A (en) Bored concrete pile drilling equipment is used in road bridge roof beam construction
CN117536545A (en) Rotary drilling rig for building foundation construction
CN108468334A (en) Sandy pear variety is dry to dig clay dado pore-creating filling pile constructing device
CN111395956A (en) Multifunctional petroleum drilling equipment
CN215485861U (en) Prospecting drill drilling quality control device
CN209724217U (en) A kind of height-adjustable rotary drilling rig
KR20180127703A (en) Boring machine having Gear-Box of two rod
KR100476894B1 (en) The method of simultaneous mixing construction using a steel pipe and its device
CN105064908A (en) Hole digging machine realizing anchoring through being driven by air pressure cylinder
CN221942352U (en) Pile machine rotary digging positioning device
CN1089835C (en) Multifunction pile-formation machine
KR200297756Y1 (en) The drifter boring machine to freely shift the body
CN105041206A (en) Hole digging machine manually controlling anchoring
CN220769356U (en) Drilling machine erecting device
CN221838273U (en) Powder spraying pile machine with telescopic drill rod structure
CN219101211U (en) Loess area rectangle drilling bored concrete pile auxiliary construction device
CN114109244B (en) Soil drilling device capable of adjusting position of drill bit
CN218934355U (en) Safety rotary structure of down-the-hole drill
CN215165554U (en) Pile driver for civil engineering
CN221609900U (en) Bored concrete pile drilling equipment is used in bridge construction
CN117328797B (en) Pile foundation collapse prevention perforating device for pile foundation construction
CN217055160U (en) Suspended type vibration tunneling device for constructing underground diaphragm wall

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: 20200331

CF01 Termination of patent right due to non-payment of annual fee