CN210232353U - Prevent lathe device that tool magazine fell and hit - Google Patents
Prevent lathe device that tool magazine fell and hit Download PDFInfo
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- CN210232353U CN210232353U CN201921225988.6U CN201921225988U CN210232353U CN 210232353 U CN210232353 U CN 210232353U CN 201921225988 U CN201921225988 U CN 201921225988U CN 210232353 U CN210232353 U CN 210232353U
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- tool magazine
- push rod
- box
- lathe
- machine tool
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Abstract
The utility model discloses a prevent lathe device that tool magazine fell and hit, concretely relates to lathe technical field, including anticollision box, the bottom of anticollision box is equipped with power adapter, the top of anticollision box is equipped with pressure sensor, the both sides of anticollision box are all fixed and are equipped with displacement sensor. The utility model discloses a magnet bayonet lock breaks away from the draw-in groove of push rod side in slipping into the recess, the elastic component is not atress, release the spout with the push rod through self elasticity, the push rod drives the buffer board and outwards expands, buffer board and the contact of lathe inner wall, fix on the lathe inner wall through the magnet piece, the elastic component is the buffering shock attenuation through the elasticity of self for the tool magazine and is handled this moment, prevent tool magazine and lathe collision, the lathe device detects the displacement speed of tool magazine simultaneously through two displacement sensor, the tool magazine is when too fast to lathe both sides displacement speed, the operation of lathe device, can avoid tool magazine and lathe wall collision damage effectively.
Description
Technical Field
The utility model relates to a lathe technical field, more specifically say, the utility model relates to a prevent lathe device that tool magazine fell and hit.
Background
Machine tools are machines for manufacturing machines, also called machine tools or machine tools, which are conventionally referred to as machine tools for short. Generally, the method for processing mechanical parts in modern machine manufacturing includes the following steps: in addition to cutting, casting, forging, welding, stamping, extruding and the like are also available, but all parts with high precision requirements and fine surface roughness requirements generally need to be finally machined by cutting on a machine tool, and the machine tool plays an important role in the construction of national economy and modernization.
Chinese patent of patent application publication No. CN 204639768U discloses a machine tool device for preventing fall and collision of a tool magazine, comprising: the tool magazine comprises a machine tool Z shaft, a machine tool transverse shaft, a tool magazine spring, a tool magazine body, a machine tool main shaft and a main shaft box, wherein the machine tool transverse shaft is connected to the upper end of the machine tool Z shaft, the machine tool Z shaft is connected with the machine tool main shaft, the main shaft box is arranged in the machine tool central shaft, two ends of the tool magazine spring are respectively connected with the machine tool transverse shaft and the tool magazine body, and the tool magazine body is connected with the machine tool box; the utility model discloses an increase induction system, lathe can more stable work, prevents that the fracture of tool magazine spring from arousing the emergence of the accident of hitting.
However, the machine tool device for preventing the tool magazine from falling and colliding provided by the technical scheme still has more defects in actual use, for example, in the operation process of the machine tool magazine, when the operation of a worker is wrong, the tool magazine still can rapidly move towards the side wall of the machine tool, when the machine tool device is used, the machine tool device can only detect the connecting spring of the tool magazine, at the moment, the connecting spring is not broken, the machine tool device cannot provide protection for the tool magazine, and the practicability is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's above-mentioned defect, the embodiment of the utility model provides a prevent lathe device that tool magazine fell and hit, break away from the draw-in groove of push rod side in slipping into the recess through the magnet bayonet lock, the elastic component is not atress, release the spout with the push rod through self elasticity, the push rod drives the buffer board and outwards expandes, buffer board and the contact of lathe inner wall, fix on the lathe inner wall through the magnet piece, the elastic component is the buffering shock attenuation through the elasticity of self for the tool magazine and is handled this moment, prevent tool magazine and lathe collision, the lathe device detects the displacement speed of tool magazine simultaneously through two displacement sensor, when the tool magazine is too fast to lathe both sides displacement speed, the lathe device moves, can avoid tool magazine and lathe wall collision damage effectively.
In order to achieve the above object, the utility model provides a following technical scheme: a machine tool device for preventing a tool magazine from falling and colliding comprises an anti-collision box, wherein a power adapter is arranged at the bottom of the anti-collision box, the power adapter is embedded in the anti-collision box, a pressure sensor is arranged at the top of the anti-collision box, the pressure sensor is embedded in the anti-collision box, displacement sensors are fixedly arranged on two sides of the anti-collision box, a buffer plate is arranged at the top of the anti-collision box, a push rod is arranged at the bottom of the buffer plate, a connecting shaft is arranged at the top of the push rod, the push rod is connected with the buffer plate through the connecting shaft, the push rod is slidably connected with the anti-collision box, the top of the push rod is embedded in the buffer plate, a first limiting block is arranged at the bottom end of the push rod and is welded with the push rod, an elastic piece is arranged at the bottom of the first limiting block, a first electromagnetic ring is arranged at the central position inside the anti, the inside both sides of anticollision box all are equipped with the second electromagnetic coil, the number that sets up of second electromagnetic coil is two, two the second electromagnetic coil all with the inner wall fixed connection of anticollision box, two one side of second electromagnetic coil and the both sides of first electromagnetic coil all are equipped with the magnet bayonet lock, the number that sets up of magnet bayonet lock is four, the both sides of push rod all are equipped with the draw-in groove, four magnet bayonet lock and draw-in groove block, the end fixing of magnet bayonet lock is equipped with the second stopper, the magnet bayonet lock is connected with first electromagnetic coil and second electromagnetic coil magnetism respectively, the fixed magnet piece that is equipped with in top of buffer board, pressure sensor, displacement sensor, first electromagnetic coil and second electromagnetic coil all with power adapter electric connection.
In a preferred embodiment, both sides of anticollision box bottom all are equipped with the installed part, the number of setting of installed part is two, two be central symmetry between the installed part, two the installed part all with the anticollision box welding.
In a preferred embodiment, the number of the displacement sensors is two, and both the displacement sensors are embedded in the crash box.
In a preferred embodiment, the top of the buffer plate is provided with a rubber pad, and the rubber pad and the buffer plate are bonded through glue.
In a preferred embodiment, the inside of anticollision box is equipped with the spout, push rod and first stopper all imbed the setting in the spout, first stopper and the inner wall clearance fit of anticollision box.
In a preferred embodiment, the top end and the bottom end of the elastic piece are respectively bonded with the first limit block and the inner wall of the crash box through viscose glue, and the elastic piece is abutted against the first limit block.
In a preferred embodiment, the crash box is provided with a groove inside, and the magnet bayonet lock and the second limiting block are embedded in the groove.
The utility model discloses a technological effect and advantage:
1. the tool magazine is characterized in that a magnet bayonet lock slides into a groove to be separated from a clamping groove on the side face of a push rod, an elastic piece is not stressed, the push rod is pushed out of a sliding groove through the elasticity of the elastic piece, the push rod drives a buffer plate to expand outwards, the buffer plate is in contact with the inner wall of a machine tool and is fixed on the inner wall of the machine tool through a magnet block, the elastic piece performs buffer and shock absorption treatment on the tool magazine through the elasticity of the elastic piece, the tool magazine is prevented from colliding with the machine tool, the machine tool device detects the displacement speed of the tool magazine through two displacement sensors at the same time, and when the displacement speed of the tool magazine to the two sides of;
2. when the buffer board expandes and the contact of lathe lateral wall, the buffer board passes through the connecting axle and moves about on the push rod and produce the moment of torsion, can make the side and the lathe lateral wall full contact of buffer board, the rubber pad is the decompression for the lathe lateral wall and handles, the magnet piece is fixed with buffer board and lathe lateral wall through self elasticity, prevent that the buffer board from making a round trip to strike the lathe lateral wall under the drive of tool magazine, when the buffer board is recovered, first electromagnetic coil and second electromagnetic coil insert reverse current, first electromagnetic coil and second electromagnetic coil produce the N magnetic field the same with magnet bayonet lock tip magnetic field this moment, like poles repel each other, first electromagnetic coil and second electromagnetic coil promote magnet bayonet lock card to go into fixed buffer board in the draw-in groove of push rod side.
Drawings
Fig. 1 is a longitudinal sectional view of the present invention.
Fig. 2 is an expanded view of the present invention.
Fig. 3 is a schematic view of the overall structure of the present invention.
Fig. 4 is a schematic view of a local structure of the driving gear of the present invention.
Fig. 5 is a partial longitudinal sectional view of the buffer plate of the present invention.
The reference signs are: 1 anticollision box, 2 power adapter, 3 pressure sensor, 4 displacement sensor, 5 buffer boards, 6 rubber pads, 7 push rods, 8 first stopper, 9 elastic component, 10 installed parts, 11 spout, 12 first electromagnetic ring, 13 second electromagnetic ring, 14 magnet bayonet locks, 15 second stopper, 16 recesses, 17 draw-in grooves, 18 magnet piece, 19 connecting axles.
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.
The utility model provides a tool magazine falling and collision prevention machine tool device as shown in figures 1-5, which comprises an anti-collision box 1, wherein the bottom of the anti-collision box 1 is provided with a power adapter 2, the power adapter 2 is embedded in the anti-collision box 1, the top of the anti-collision box 1 is provided with a pressure sensor 3, the pressure sensor 3 is embedded in the anti-collision box 1, both sides of the anti-collision box 1 are fixedly provided with displacement sensors 4, the top of the anti-collision box 1 is provided with a buffer plate 5, the bottom of the buffer plate 5 is provided with a push rod 7, the top of the push rod 7 is provided with a connecting shaft 19, the push rod 7 is connected with the buffer plate 5 through the connecting shaft 19, the push rod 7 is connected with the anti-collision box 1 in a sliding manner, the top of the push rod 7 is embedded in the buffer plate 5, the bottom end of the push rod 7 is provided with a first stopper 8, the bottom of the first limiting block 8 is provided with an elastic part 9, the central position in the anti-collision box 1 is provided with a first electromagnetic ring 12, the first electromagnetic ring 12 is fixedly connected with the inner wall of the anti-collision box 1, the two sides in the anti-collision box 1 are provided with second electromagnetic rings 13, the number of the second electromagnetic rings 13 is two, the two second electromagnetic rings 13 are fixedly connected with the inner wall of the anti-collision box 1, one side of the two second electromagnetic rings 13 and the two sides of the first electromagnetic ring 12 are provided with magnet clamping pins 14, the number of the magnet clamping pins 14 is four, the two sides of the push rod 7 are provided with clamping grooves 17, the four magnet clamping pins 14 are clamped with the clamping grooves 17, the end part of the magnet clamping pin 14 is fixedly provided with a second limiting block 15, the magnet clamping pin 14 is respectively magnetically connected with the first electromagnetic ring 12 and the second electromagnetic ring 13, the top of the buffer plate 5 is fixedly provided with a magnet block 18, the pressure sensor 3, the displacement sensor 4, the first electromagnetic ring 12 and the second electromagnetic ring 13 are electrically connected with the power adapter 2, the pressure sensor 3, the displacement sensor 4, the first electromagnetic ring 12 and the second electromagnetic ring 13 in the utility model are respectively an HCR-A4 power adapter, a CYYZ11 pressure sensor, a ZLDS100 displacement sensor, an FR-65 first electromagnetic ring and an FR-32 second electromagnetic ring, and belong to the prior art;
the implementation mode is specifically as follows: the power adapter 2 is electrically connected with a machine tool controller, when an unstable phenomenon occurs in the operation process of a machine tool magazine, the displacement speed of the tool magazine is no longer a constant value, the two displacement sensors 4 simultaneously detect that the displacement speed of the tool magazine is accelerated, send an electric signal to the machine tool controller, the machine tool controller controls the first electromagnetic coil 12 and the second electromagnetic coil 13 to be connected with forward current, at the moment, the first electromagnetic coil 12 and the second electromagnetic coil 13 generate an S-pole magnetic field different from the magnetic field at the end part of the magnet bayonet 14, the magnetic fields attract each other in opposite directions, the first electromagnetic coil 12 and the second electromagnetic coil 13 adsorb the magnet bayonet 14, the magnet bayonet 14 slides into the groove 16 to be separated from the clamping groove 17 on the side surface of the push rod 7, the elastic piece 9 is free of stress, the push rod 7 is pushed out of the sliding groove 11 through the elasticity of the elastic piece, the push rod 7 drives the buffer plate 5 to expand outwards, at the moment, the elastic piece 9 is used for buffering and damping the tool magazine through elasticity of the elastic piece, so that the tool magazine is prevented from colliding with a machine tool, the machine tool device detects the displacement speed of the tool magazine through the two displacement sensors 4 at the same time, and when the displacement speed of the tool magazine to the two sides of the machine tool is too high, the machine tool device runs, so that the tool magazine can be effectively prevented from colliding and damaging the wall of the machine tool.
the number of the displacement sensors 4 is two, and the two displacement sensors 4 are embedded in the anti-collision box 1;
the top of the buffer plate 5 is provided with a rubber pad 6, and the rubber pad 6 is bonded with the buffer plate 5 through viscose;
a sliding groove 11 is formed in the anti-collision box 1, the push rod 7 and the first limiting block 8 are embedded in the sliding groove 11, and the first limiting block 8 is in clearance fit with the inner wall of the anti-collision box 1;
the top end and the bottom end of the elastic part 9 are respectively bonded with the first limiting block 8 and the inner wall of the anti-collision box 1 through viscose glue, and the elastic part 9 is abutted against the first limiting block 8;
a groove 16 is formed in the anti-collision box 1, and the magnet bayonet 14 and the second limiting block 15 are embedded in the groove 16;
the implementation mode is specifically as follows: the anti-collision box 1 is fixedly installed with two side walls which are easily collided with a tool magazine through the installation part 10, when the buffer plate 5 is unfolded to be contacted with the side wall of a machine tool, the buffer plate 5 can move on the push rod 7 through the connecting shaft 19 to generate torque, so that the side surface of the buffer plate 5 is completely contacted with the side wall of the machine tool, the rubber pad 6 is used for reducing the pressure of the side wall of the machine tool, the magnet block 18 fixes the buffer plate 5 and the side wall of the machine tool through the self elasticity to prevent the buffer plate 5 from impacting the side wall of the machine tool back and forth under the driving of the tool magazine, when the buffer plate 5 is recovered, a worker pushes the buffer plate 5 to move towards the anti-collision box 1, after the buffer plate 5 is contacted with the pressure sensor 3, the pressure sensor 3 sends an electric signal to the machine tool controller, the machine tool controller controls the first electromagnetic coil 12 and the second electromagnetic coil 13 to be connected with reverse, the like poles repel each other, and the first electromagnetic coil 12 and the second electromagnetic coil 13 push the magnet clamping pin 14 to be clamped into the clamping groove 17 on the side surface of the push rod 7 to fix the buffer plate 5.
The utility model discloses the theory of operation:
referring to the attached drawings 1-5 of the specification, two displacement sensors 4 detect the acceleration of the displacement speed of the tool magazine at the same time, send an electric signal to a machine tool controller, the machine tool controller controls a first electromagnetic coil 12 and a second electromagnetic coil 13 to be connected with a forward current, at the moment, the first electromagnetic coil 12 and the second electromagnetic coil 13 generate an S-pole magnetic field with different magnetism from that of the end part of a magnet bayonet 14, the magnetic fields are opposite in attraction, the magnet bayonet 14 is adsorbed by the first electromagnetic coil 12 and the second electromagnetic coil 13, the magnet bayonet 14 slides into a groove 16 to be separated from a clamping groove 17 on the side surface of a push rod 7, and an elastic element 9 is not stressed, the push rod 7 is pushed out of the chute 11 by the elasticity of the push rod 7, the push rod 7 drives the buffer plate 5 to expand outwards, the buffer plate 5 is contacted with the inner wall of the machine tool, the tool magazine is fixed on the inner wall of the machine tool through the magnet block 18, and the elastic piece 9 performs buffering and damping treatment on the tool magazine through the elasticity of the elastic piece so as to prevent the tool magazine from colliding with the machine tool;
referring to the attached drawings 1, 3, 4 and 5 in the specification, when the buffer plate 5 is unfolded to contact with the side wall of the machine tool, the buffer plate 5 moves on the push rod 7 through the connecting shaft 19 to generate torque, so that the side surface of the buffer plate 5 can be completely contacted with the side wall of the machine tool, the rubber pad 6 performs pressure reduction treatment on the side wall of the machine tool, the buffer plate 5 and the side wall of the machine tool are fixed through the self elasticity of the magnet block 18, the buffer plate 5 is prevented from impacting the side wall of the machine tool back and forth under the driving of a tool magazine, when the buffer plate 5 is recovered, a worker pushes the buffer plate 5 to move towards the anti-collision box 1, after the buffer plate 5 is contacted with the pressure sensor 3, the pressure sensor 3 sends an electric signal to the machine tool controller, the machine tool controller controls the first electromagnetic coil 12 and the second electromagnetic coil 13 to be connected with reverse current, at the moment, the first electromagnetic coil, the first electromagnetic coil 12 and the second electromagnetic coil 13 push the magnet clamping pin 14 to be clamped into the clamping groove 17 on the side surface of the push rod 7 to fix the buffer plate 5.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;
and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a prevent lathe device that tool magazine fell and hit, includes anticollision box (1), its characterized in that: the bottom of the anti-collision box (1) is provided with a power adapter (2), the power adapter (2) is embedded in the anti-collision box (1), the top of the anti-collision box (1) is provided with a pressure sensor (3), the pressure sensor (3) is embedded in the anti-collision box (1), two sides of the anti-collision box (1) are fixedly provided with displacement sensors (4), the top of the anti-collision box (1) is provided with a buffer plate (5), the bottom of the buffer plate (5) is provided with a push rod (7), the top of the push rod (7) is provided with a connecting shaft (19), the push rod (7) is connected with the buffer plate (5) through the connecting shaft (19), the push rod (7) is connected with the anti-collision box (1) in a sliding manner, the top of the push rod (7) is embedded in the buffer plate (5), the bottom of the push rod (7) is provided with a first limiting block (, the anti-collision device is characterized in that the first limiting block (8) is welded with the push rod (7), an elastic part (9) is arranged at the bottom of the first limiting block (8), a first electromagnetic ring (12) is arranged at the center inside the anti-collision box (1), the first electromagnetic ring (12) is fixedly connected with the inner wall of the anti-collision box (1), second electromagnetic rings (13) are arranged on two sides inside the anti-collision box (1), the number of the second electromagnetic rings (13) is two, the two second electromagnetic rings (13) are fixedly connected with the inner wall of the anti-collision box (1), magnet clamping pins (14) are arranged on one side of the two second electromagnetic rings (13) and on two sides of the first electromagnetic ring (12), the number of the magnet clamping pins (14) is four, clamping grooves (17) are arranged on two sides of the push rod (7), and the magnet clamping pins (14) are clamped with the clamping grooves (17), the fixed second stopper (15) that is equipped with in tip of magnet bayonet lock (14), magnet bayonet lock (14) are connected with first electromagnetism circle (12) and second electromagnetism circle (13) magnetism respectively, the fixed magnet piece (18) that is equipped with in top of buffer board (5), pressure sensor (3), displacement sensor (4), first electromagnetism circle (12) and second electromagnetism circle (13) all with power adapter (2) electric connection.
2. The machine tool device for preventing the tool magazine from falling and colliding as claimed in claim 1, wherein: the both sides of anticollision box (1) bottom all are equipped with installed part (10), the number that sets up of installed part (10) is two, two be central symmetry between installed part (10) and distribute, two installed part (10) all with anticollision box (1) welding.
3. The machine tool device for preventing the tool magazine from falling and colliding as claimed in claim 1, wherein: the number of the displacement sensors (4) is two, and the two displacement sensors (4) are embedded into the anti-collision box (1).
4. The machine tool device for preventing the tool magazine from falling and colliding as claimed in claim 1, wherein: the top of buffer board (5) is equipped with rubber pad (6), rubber pad (6) pass through the viscose bonding with buffer board (5).
5. The machine tool device for preventing the tool magazine from falling and colliding as claimed in claim 1, wherein: the inside of anticollision box (1) is equipped with spout (11), push rod (7) and first stopper (8) all imbed the setting in spout (11), the inner wall clearance fit of first stopper (8) and anticollision box (1).
6. The machine tool device for preventing the tool magazine from falling and colliding as claimed in claim 1, wherein: the top and the bottom of elastic component (9) pass through the viscose bonding with the inner wall of first stopper (8) and anticollision box (1) respectively, elastic component (9) and first stopper (8) butt.
7. The machine tool device for preventing the tool magazine from falling and colliding as claimed in claim 1, wherein: the inside of anticollision box (1) is equipped with recess (16), magnet bayonet lock (14) and second stopper (15) all imbed the setting in recess (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921225988.6U CN210232353U (en) | 2019-07-31 | 2019-07-31 | Prevent lathe device that tool magazine fell and hit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921225988.6U CN210232353U (en) | 2019-07-31 | 2019-07-31 | Prevent lathe device that tool magazine fell and hit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210232353U true CN210232353U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921225988.6U Expired - Fee Related CN210232353U (en) | 2019-07-31 | 2019-07-31 | Prevent lathe device that tool magazine fell and hit |
Country Status (1)
| Country | Link |
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| CN (1) | CN210232353U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112091757A (en) * | 2020-09-14 | 2020-12-18 | 林金标 | Automatic chamfering equipment for producing threaded pipe fittings |
| CN113337959A (en) * | 2021-06-16 | 2021-09-03 | 扬州兴轮绳缆有限公司 | Rope sheath braiding machine |
| CN114833623A (en) * | 2022-04-20 | 2022-08-02 | 安徽新诺精工股份有限公司 | Gantry machine tool with manual head warehouse exchange structure |
| CN116511963A (en) * | 2023-06-15 | 2023-08-01 | 佛山市艾倍科五金有限公司 | Numerical control machine tool with anti-collision cutter mechanism |
-
2019
- 2019-07-31 CN CN201921225988.6U patent/CN210232353U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112091757A (en) * | 2020-09-14 | 2020-12-18 | 林金标 | Automatic chamfering equipment for producing threaded pipe fittings |
| CN112091757B (en) * | 2020-09-14 | 2022-09-02 | 广东派博钢管有限公司 | Automatic chamfering equipment for producing threaded pipe fittings |
| CN113337959A (en) * | 2021-06-16 | 2021-09-03 | 扬州兴轮绳缆有限公司 | Rope sheath braiding machine |
| CN114833623A (en) * | 2022-04-20 | 2022-08-02 | 安徽新诺精工股份有限公司 | Gantry machine tool with manual head warehouse exchange structure |
| CN116511963A (en) * | 2023-06-15 | 2023-08-01 | 佛山市艾倍科五金有限公司 | Numerical control machine tool with anti-collision cutter mechanism |
| CN116511963B (en) * | 2023-06-15 | 2024-02-27 | 深圳智准多轴技术有限公司 | Numerical control machine tool with anti-collision cutter mechanism |
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Granted publication date: 20200403 Termination date: 20210731 |