CN211553307U - Automobile brake detection platform - Google Patents
Automobile brake detection platform Download PDFInfo
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- CN211553307U CN211553307U CN202020182083.1U CN202020182083U CN211553307U CN 211553307 U CN211553307 U CN 211553307U CN 202020182083 U CN202020182083 U CN 202020182083U CN 211553307 U CN211553307 U CN 211553307U
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Abstract
The utility model relates to a platform is examined in car braking, including frame, parallel mount initiative cylinder and the driven cylinder in the frame, the one end transmission of initiative cylinder along its length direction is connected with power device. The other end of the chain wheel is fixedly connected with a chain wheel, the outer side of the chain wheel is meshed with a chain, a driven roller is in transmission connection with a driving roller through the chain, and a lifting device is arranged between the driving roller and the driven roller. The limiting device is arranged below the lifting device and comprises a plurality of cylinders, a limiting rod and a limiting pulley which are fixed in the rack respectively, a piston rod of each cylinder is fixedly connected with one end of the limiting rod, and the limiting pulley is rotatably connected to one end, far away from the cylinders, of the limiting rod. When the tire contacts with the driving roller and the driven roller, the air cylinder drives the limiting rods to be close to each other, and the limiting pulleys are in mutual rotating fit with the side walls of the tire. Through spacing pulley centre gripping tire for the skew of position about the tire can not take place when rotating, has improved the detection precision.
Description
Technical Field
The utility model belongs to the technical field of the automotive inspection equipment technique and specifically relates to a platform is examined in car braking is related to.
Background
The automobile braking performance is one of important factors for safe driving, is directly related to traffic safety, and is particularly important for guaranteeing the traffic safety along with the improvement of the driving speed of the automobile, so that the automobile braking performance is also the key point of automobile detection and diagnosis. The automobile brake detection platform is used for detecting the braking force of wheels of a vehicle, the braking force difference of coaxial left and right wheels and the parking force, and is widely applied to traffic safety detection stations and industries of automobile manufacturing, maintenance and the like.
In the prior art, for example, chinese patent publication No. CN204043924U discloses a roller reaction type automobile brake detection table, which includes a driving roller, a driven roller, a driving device, a lifter, and a sprocket. The driving device comprises a motor and a transmission device which are arranged inside the driving roller and adopts one-stage external meshing and one-stage internal meshing gear transmission. The driving roller and the driven roller are arranged on the rack in parallel and connected through a chain, a lifter is arranged between the two rollers, and the part, extending out of the rollers, of a main roller shaft of the driving roller is connected with a torque sensor through a coupler. In the working process of measuring the braking force of the vehicle, the vehicle to be detected firstly runs on the detection table, so that the tire is positioned on the lifter between the driving roller and the driven roller, and then the lifter is driven to descend, so that the table surface of the tire is respectively contacted with the driving roller and the driven roller. When the vehicle is in neutral gear, the motor is started to drive the driving roller and the driven roller to rotate, and the driving roller and the driven roller simultaneously drive the wheels of the detected vehicle to rotate. When the driver steps on the brake pedal after the vehicle speed is stable, the tyre of the wheel exerts a counterforce which is opposite to the braking force direction and is equivalent to the braking force direction on the surface tangent direction of the roller to prevent the roller from rotating, the counterforce is transmitted to the torque sensor through the coupler, and the sensor converts the force into an electric signal and transmits the electric signal to the instrument for processing and displays the detection result in a digital form.
The above prior art solutions have the following drawbacks: although the utility model discloses above-mentioned through arranging drive arrangement in the inside of initiative cylinder for examine test table and have compact structure small, the flat advantage of easily installing and using of shape. However, when the vehicle tire rotates between the driving roller and the driven roller, the length of the driving roller and the driven roller is often larger than the width of the tire because the detection table needs to detect tires with different widths. During detection, a driver drives a vehicle on the detection table, the tire is possibly located at a position close to the frame of the rack due to negligence, and the driving roller and the driven roller drive the tire to rotate. The tire is easy to shift in the left and right directions under the condition of rotation, so that the tire and a frame of a rack are rubbed, the detection precision is greatly influenced, and the vehicle tire is easy to damage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a make the tire stable rotation on main, driven gyro wheel through stop device to improve the car braking that detects the precision and examine test table.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a car brake detection table comprises a rack, a driving roller and a driven roller which are arranged in the rack in parallel, wherein the driving roller is connected with a power device along one end of the driving roller in the length direction in a transmission manner, the other end of the driving roller is fixedly connected with a chain wheel, the outer side of the chain wheel is meshed with a chain, the driven roller is connected with the driving roller in a transmission manner through the chain, a lifting device is arranged between the driving roller and the driven roller and comprises a hydraulic cylinder and a lifting plate which are fixed in the rack, and one end of a piston rod of the hydraulic cylinder is fixedly connected with the lifting plate;
a limiting device is arranged below the lifting plate and comprises a plurality of cylinders, a limiting rod and a limiting pulley which are respectively fixed in the frame, a piston rod of each cylinder is fixedly connected with one end of the limiting rod, and the limiting pulley is rotatably connected with one end, far away from the cylinder, of the limiting rod;
when the tire contacts with the driving roller and the driven roller, the air cylinder drives the limiting rods to be close to each other, and the limiting pulley is in mutual rotating fit with the side wall of the tire.
Through the technical scheme, when the automobile braking performance is detected, the front wheel of the automobile is slowly started to move the platform, so that the automobile wheel support is arranged on the roller, and the automobile is hung at a neutral position at the moment. Meanwhile, the tires of the vehicle are kept a certain distance from the edge of the rack, after the lifting plate descends by driving the hydraulic cylinder, the piston rod of the lifting plate is driven to drive the limiting rod to be close to each other by driving the cylinder, so that the limiting pulleys are respectively abutted against the side faces of the tires, and the positions of the tires between the rollers are limited, and the rotation of the tires is not influenced. The driving power device enables the driving roller and the driven roller to drive the wheel to rotate, the wheel can drive the limiting pulley to rotate when rotating, and meanwhile, due to the arrangement of the limiting rod and the limiting pulley, the stability of the rotation of the tire is improved. And the position of the limiting pulley is adjusted through the cylinder, so that tires of different specifications can be clamped, the tires cannot deviate from left and right positions when rotating, the phenomenon that the tires rub with a frame of a rack is avoided, and the detection precision is improved.
The present invention may be further configured in a preferred embodiment as: when the hydraulic cylinder drives the lifting plate to move upwards to contact with the table top of the tire, the limiting pulley is arranged lower than the lifting plate and is positioned in a gap between the driven pulley and the lifting plate;
the pneumatic cylinder drive lift the board downstream, spacing pulley is higher than lift the board and be less than the initiative cylinder sets up.
Through the technical scheme, after the automobile tire is driven into the braking platform, the tire tread of the tire is contacted with the lifting plate, and the limiting pulley is arranged below the lifting plate, so that the automobile can be stably driven into or out of the braking platform, and the limiting pulley is prevented from being crushed by the automobile tire. When the board descends that lifts, the tire sinks certain distance, and the tread and the initiative cylinder and the driven cylinder intermeshing of tire, spacing pulley is higher than the board that lifts simultaneously and can make its lateral wall contact with the tire, has realized the spacing effect to the tire.
The present invention may be further configured in a preferred embodiment as: spacing pulley with be provided with elastic mechanism between the gag lever post, elastic mechanism includes the mounting panel and fixes the spring in mounting panel one end, the spring is kept away from the one end of mounting panel with gag lever post fixed connection, spacing pulley rotates to be connected on the mounting panel.
Through the technical scheme, when the automobile is braked and detected on the brake detection platform, each tire is clamped at a fixed position by the two limiting pulleys respectively. Even if the tire has small deviation in the rotating process, the mounting plate compresses the spring by applying an external force to the limiting pulley, and the spring drives the tire to return to the original position under the recovery of the self elastic force. Under the prerequisite that prevents that tire and rack frame from taking place friction, elastic mechanism's setting can enough provide certain space when squinting about for the tire, can guarantee again that the tire can be stable rotate in same direction, has further improved the precision that detects.
The present invention may be further configured in a preferred embodiment as: the power device comprises a motor and a first gear fixed on an output shaft of the motor, a main roller shaft is fixedly connected in the driving roller in an integrated forming mode, a second gear is fixedly connected to one end of the main roller shaft along the length direction of the main roller shaft, and the first gear is meshed with the second gear.
Through above-mentioned technical scheme, during the detection, driving motor rotates, makes its output shaft drive first gear and rotates, first gear and second gear intermeshing. The second gear rotates to enable the main roller shaft to drive the driving roller to rotate, so that the rotation of a vehicle tire is realized, the power of the motor can be efficiently transmitted on the tire, the utilization rate of energy is improved, and the detection precision is improved.
The present invention may be further configured in a preferred embodiment as: an auxiliary roller shaft is fixedly connected into the driven roller in an integrated mode, and a coupler is arranged at one end of the auxiliary roller shaft in the length direction.
Through the technical scheme, when the counter drum shaft rotates, the coupler serves as a safety device to prevent the counter drum shaft from bearing overlarge load, and the overload protection effect is achieved.
The present invention may be further configured in a preferred embodiment as: and the part, extending out of one end of the driven roller, far away from each other is connected with a torque sensor through the coupler.
Through the technical scheme, when the tire of the vehicle is detected on the brake detection platform, the driving roller and the driven roller drive the tire to rotate, and when the rotating tire is braked, the tire exerts a counter-acting force which is opposite to the braking force direction and is equivalent to the braking force direction on the surface tangential direction of the rollers, so that the rollers are prevented from rotating. At the moment, under the action of the reaction moment, the motor and the main roller shaft deflect towards the opposite direction of the rotation of the roller, the part of the auxiliary roller shaft extending out of the roller is connected with a torque sensor through a coupler, the torque sensor generates input, and a measuring system measures the torque and converts the torque into braking force.
The present invention may be further configured in a preferred embodiment as: the driving roller and the driven roller are symmetrically arranged along the central axis of the rack.
Through the technical scheme, when the braking force of the automobile is detected, the detection platform can simultaneously detect two tires on one side of the automobile, and the detection precision is improved while the working efficiency is increased.
The present invention may be further configured in a preferred embodiment as: the outer surfaces of the driving roller and the driven roller are uniformly and fixedly connected with anti-skid protrusions.
Through the technical scheme, when the tire rotates between the driving roller and the driven roller, the anti-skidding protrusions increase the friction force between the roller and the tire surface of the vehicle tire, the phenomenon of tire skidding is prevented, and the detection precision of the braking force of the vehicle is further improved.
To sum up, the utility model discloses a following at least one useful technological effect:
1. after the lifting plate descends by driving the hydraulic cylinder, the piston rod of the lifting cylinder drives the limiting rods to be close to each other by driving the hydraulic cylinder, so that the limiting pulleys are respectively abutted to the side faces of the tires, and the positions of the tires between the rollers are limited while the rotation of the tires is not influenced. The driving power device enables the driving roller and the driven roller to drive the wheel to rotate, the wheel can drive the limiting pulley to rotate when rotating, and meanwhile, due to the arrangement of the limiting rod and the limiting pulley, the stability of the rotation of the tire is improved. And the position of the limiting pulley is adjusted through the cylinder, so that tires of different specifications can be clamped, the tires cannot deviate from left and right positions when rotating, the phenomenon that the tires rub with a frame of a rack is avoided, and the detection precision is improved.
2. When the automobile is braked and detected on the brake detection platform, each tire is clamped at a fixed position by two limiting pulleys respectively. Even if the tire has small deviation in the rotating process, the mounting plate compresses the spring by applying an external force to the limiting pulley, and the spring drives the tire to return to the original position under the recovery of the self elastic force. Under the prerequisite that prevents that tire and rack frame from taking place friction, elastic mechanism's setting can enough provide certain space when squinting about for the tire, can guarantee again that the tire can be stable rotate in same direction, has further improved the precision that detects.
3. When the tire of the vehicle is detected on the braking detection platform, the driving roller and the driven roller drive the tire to rotate, and when the rotating tire is braked, the tire of the wheel exerts a counter-acting force which is opposite to the direction of the braking force and is equivalent to the direction of the tangent line of the surface of the roller, so that the roller is prevented from rotating. At the moment, under the action of the reaction moment, the motor and the main roller shaft deflect towards the opposite direction of the rotation of the roller, the part of the auxiliary roller shaft extending out of the roller is connected with a torque sensor through a coupler, the torque sensor generates input, and a measuring system measures the torque and converts the torque into braking force.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Reference numerals: 1. a frame; 2. a driving roller; 21. a motor; 22. a first gear; 23. a main drum shaft; 24. a second gear; 25. anti-skid projections; 3. a driven drum; 31. a secondary drum shaft; 32. a coupling; 33. a torque sensor; 4. a sprocket; 5. a chain; 6. a lifting plate; 7. a limiting device; 71. a limiting rod; 72. a limiting pulley; 8. an elastic mechanism; 81. mounting a plate; 82. a spring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a platform is examined in car braking, including frame 1, parallel mount be columniform initiative cylinder 2 and driven cylinder 3 in frame 1, initiative cylinder 2 is connected with power device along its length direction's one end transmission. Further, the power device comprises a motor 21 and a first gear 22 fixed on an output shaft of the motor 21, a main roller shaft 23 is fixedly connected in the driving roller 2 in an integrated forming mode, one end of the main roller shaft 23 in the length direction is fixedly connected with a second gear 24, and the first gear 22 is meshed with the second gear 24.
During detection, the driving motor 21 rotates, so that the output shaft of the driving motor drives the first gear 22 to rotate, and the first gear 22 is meshed with the second gear 24. The second gear 24 rotates to enable the main roller shaft 23 to drive the driving roller 2 to rotate, so that the rotation of the vehicle tire is realized, the power of the motor 21 can be efficiently transmitted on the tire, the utilization rate of energy is improved, and the detection precision is improved. And the driving roller 2 and the driven roller 3 are symmetrically arranged along the central axis of the frame 1, so that when the braking force of the automobile is detected, the detection platform can simultaneously detect two tires on one side of the automobile, and the detection precision is improved while the working efficiency is increased.
Further, the other end fixedly connected with sprocket 4 that power device was kept away from to driving drum 2, the outside meshing of sprocket 4 has chain 5, and driven drum 3 is connected with driving drum 2 transmission through chain 5, is provided with lifting devices between driving drum 2 and the driven drum 3, and lifting devices is including fixing the pneumatic cylinder in frame 1 and being rectangular lift board 6, the one end and the 6 fixed connection of lift board of the piston rod of pneumatic cylinder. An auxiliary drum shaft 31 is fixedly connected to the driven drum 3 in an integrated manner, and a coupling 32 is arranged at one end of the auxiliary drum shaft 31 in the length direction. When the secondary drum shaft 31 rotates, the coupling 32 serves as a safety device for preventing the secondary drum shaft 31 from being subjected to an excessive load, thereby performing an overload protection function.
Meanwhile, the extending roller part at the end, far away from each other, of the driven roller 3 is connected with a torque sensor 33 through a coupler 32, and when the tire of the vehicle is detected on a braking detection table, the driving roller 2 and the driven roller 3 drive the tire to rotate. When the rotating tire is braked, the tire of the wheel exerts a reaction force which is opposite to the braking force direction and has the same value with the tangential direction of the surface of the roller, and the roller is prevented from rotating. At this time, the motor is deflected in the opposite direction of the drum rotation together with the main drum shaft 23 by the reaction torque, and the portion of the sub-drum shaft 31 extending out of the drum is connected to the torque sensor 33 through the coupling 32, and the torque is measured by the measuring system and converted into the braking force by the torque sensor 33.
Referring to fig. 1, the anti-slip protrusions 25 are uniformly and fixedly connected to the outer surfaces of the driving roller 2 and the driven roller 3, and when the tire rotates between the driving roller 2 and the driven roller 3, the anti-slip protrusions 25 increase the friction force between the rollers and the tread of the vehicle tire, so that the phenomenon of tire slip is prevented, and the detection precision of the vehicle braking force is further improved.
Referring to fig. 2, a limiting device 7 is disposed below the lifting plate 6, the limiting device 7 includes a plurality of cylinders, a limiting rod 71 and a limiting pulley 72, which are respectively fixed in the frame 1, a piston rod of each cylinder is fixedly connected with one end of the limiting rod 71, and the limiting pulley 72 is rotatably connected with one end of the limiting rod 71, which is far away from the cylinder. When the tire contacts with the driving roller 2 and the driven roller 3, the air cylinder drives the limiting rod 71 to approach each other, and the limiting pulley 72 is in mutual rotating fit with the sidewall of the tire. When the hydraulic cylinder drives the lifting plate 6 to move upwards to contact with the table top of the tire, the limiting pulley 72 is lower than the lifting plate 6, and the limiting pulley 72 is located in a gap between the driven pulley and the lifting plate 6. The hydraulic cylinder drives the lifting plate 6 to move downwards, and the limiting pulley 72 is higher than the lifting plate 6 and lower than the driving roller 2.
After the automobile tire is driven into the braking platform, the tire surface of the tire is contacted with the lifting plate 6, and the limiting pulley 72 is arranged below the lifting plate 6, so that the automobile can stably drive in or drive out from the braking platform, and meanwhile, the limiting pulley 72 is prevented from being crushed by the automobile tire. When the lifting plate 6 descends, the tire sinks for a certain distance, the tread of the tire is meshed with the driving roller 2 and the driven roller 3, and meanwhile, the limiting pulley 72 is higher than the lifting plate 6, so that the limiting pulley is in contact with the side wall of the tire, and the effect of limiting the tire is achieved.
Furthermore, an elastic mechanism 8 is arranged between the limiting pulley 72 and the limiting rod 71, the elastic mechanism 8 comprises a mounting plate 81 and a spring fixed at one end of the mounting plate 81, one end of the spring far away from the mounting plate 81 is fixedly connected with the limiting rod 71, and the limiting pulley 72 is rotatably connected to the mounting plate 81. When the automobile is braked and detected on the brake detection table, each tire is clamped at a fixed position by the two limiting pulleys 72. Even if the tire is slightly deviated during rotation, the mounting plate 81 compresses the spring by applying an external force to the limiting pulley 72, and the spring drives the tire to return to the original position by restoring its own elastic force. Under the prerequisite that prevents that tire and rack frame from taking place friction, elastic mechanism 8's setting can enough provide certain space when squinting about for the tire, can guarantee again that the tire can be stable rotate in same direction, has further improved the precision that detects.
The implementation principle of the embodiment is as follows: when the automobile braking performance is detected, the front wheel of the automobile is slowly started to move the platform, so that the automobile wheel support is arranged on the roller, and the automobile is hung at a neutral position at the moment. Meanwhile, the tires of the vehicle are kept a certain distance from the edge of the rack 1, after the lifting plate 6 descends by driving the hydraulic cylinder, the piston rod of the lifting plate drives the limiting rods 71 to be close to each other by driving the hydraulic cylinder, so that the limiting pulleys 72 are respectively abutted against the side faces of the tires, the positions of the tires between the rollers are limited, and the rotation of the tires is not influenced.
The driving power device enables the driving roller 2 and the driven roller 3 to drive the wheel to rotate, the wheel can drive the limiting pulley 72 to rotate when rotating, and meanwhile, due to the arrangement of the limiting rod 71 and the limiting pulley 72, the stability of the rotation of the tire is improved. And the position of the limiting pulley 72 is adjusted by the cylinder, so that tires with different specifications can be clamped, the tires cannot deviate from left and right positions when rotating, the phenomenon that the tires rub with the frame of the rack is avoided, and the detection precision is improved.
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 (8)
1. The utility model provides a platform is examined in car braking, includes frame (1), parallel mount driving roll (2) and driven cylinder (3) in frame (1), driving roll (2) are connected with power device along its length direction's one end transmission, and other end fixedly connected with sprocket (4), the outside meshing of sprocket (4) has chain (5), driven cylinder (3) are passed through chain (5) with driving roll (2) transmission is connected, driving roll (2) with be provided with lifting devices, its characterized in that between driven cylinder (3): the lifting device comprises a hydraulic cylinder and a lifting plate (6) which are fixed in the rack (1), and one end of a piston rod of the hydraulic cylinder is fixedly connected with the lifting plate (6);
a limiting device (7) is arranged below the lifting plate (6), the limiting device (7) comprises a plurality of cylinders, a limiting rod (71) and a limiting pulley (72) which are respectively fixed in the rack (1), a piston rod of each cylinder is fixedly connected with one end of the limiting rod (71), and the limiting pulley (72) is rotatably connected with one end, far away from the cylinder, of the limiting rod (71);
when the tire is in contact with the driving roller (2) and the driven roller (3), the air cylinder drives the limiting rod (71) to be close to each other, and the limiting pulley (72) is in mutual rotating fit with the side wall of the tire.
2. The vehicle brake test stand of claim 1, wherein: when the hydraulic cylinder drives the lifting plate (6) to move upwards to contact with the table top of a tire, the limiting pulley (72) is arranged lower than the lifting plate (6), and the limiting pulley (72) is positioned in a gap between the driven pulley and the lifting plate (6);
the pneumatic cylinder drive lift board (6) downstream, spacing pulley (72) are higher than lift board (6) just are less than initiative cylinder (2) set up.
3. The vehicle brake test stand of claim 2, wherein: spacing pulley (72) with be provided with elastic mechanism (8) between gag lever post (71), elastic mechanism (8) include mounting panel (81) and fix the spring in mounting panel (81) one end, the spring is kept away from the one end of mounting panel (81) with gag lever post (71) fixed connection, spacing pulley (72) rotate to be connected on mounting panel (81).
4. The vehicle brake test stand of claim 1, wherein: the power device comprises a motor (21) and a first gear (22) fixed on an output shaft of the motor (21), a main roller shaft (23) is fixedly connected into the driving roller (2) in an integrated mode, one end of the main roller shaft (23) in the length direction is fixedly connected with a second gear (24), and the first gear (22) and the second gear (24) are meshed with each other.
5. The vehicle brake test stand of claim 4, wherein: an auxiliary roller shaft (31) is fixedly connected into the driven roller (3) in an integrated forming mode, and a coupler (32) is arranged at one end of the auxiliary roller shaft (31) in the length direction.
6. The vehicle brake test stand of claim 5, wherein: the parts, extending out of one ends of the driven rollers (3) far away from each other, of the rollers are connected with a torque sensor (33) through the coupling (32).
7. The vehicle brake test stand of claim 1, wherein: the driving roller (2) and the driven roller (3) are symmetrically arranged along the central axis of the rack (1).
8. The vehicle brake test stand of claim 7, wherein: the outer surfaces of the driving roller (2) and the driven roller (3) are uniformly and fixedly connected with anti-skid protrusions (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020182083.1U CN211553307U (en) | 2020-02-18 | 2020-02-18 | Automobile brake detection platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020182083.1U CN211553307U (en) | 2020-02-18 | 2020-02-18 | Automobile brake detection platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211553307U true CN211553307U (en) | 2020-09-22 |
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ID=72494608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020182083.1U Expired - Fee Related CN211553307U (en) | 2020-02-18 | 2020-02-18 | Automobile brake detection platform |
Country Status (1)
| Country | Link |
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| CN (1) | CN211553307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964485A (en) * | 2021-02-20 | 2021-06-15 | 广东博智林机器人有限公司 | Tire testing device |
-
2020
- 2020-02-18 CN CN202020182083.1U patent/CN211553307U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964485A (en) * | 2021-02-20 | 2021-06-15 | 广东博智林机器人有限公司 | Tire testing device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 |