CN218955650U - Special tool for measuring distance between metal cover of forklift and charged part of storage battery - Google Patents

Special tool for measuring distance between metal cover of forklift and charged part of storage battery Download PDF

Info

Publication number
CN218955650U
CN218955650U CN202223171877.6U CN202223171877U CN218955650U CN 218955650 U CN218955650 U CN 218955650U CN 202223171877 U CN202223171877 U CN 202223171877U CN 218955650 U CN218955650 U CN 218955650U
Authority
CN
China
Prior art keywords
scale
guide
hole
casing
forklift
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.)
Active
Application number
CN202223171877.6U
Other languages
Chinese (zh)
Inventor
徐超
周传林
徐罗军
邓代军
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.)
Hubei Special Equipment Inspection And Testing Institute
Original Assignee
Hubei Special Equipment Inspection And Testing Institute
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 Hubei Special Equipment Inspection And Testing Institute filed Critical Hubei Special Equipment Inspection And Testing Institute
Priority to CN202223171877.6U priority Critical patent/CN218955650U/en
Application granted granted Critical
Publication of CN218955650U publication Critical patent/CN218955650U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Forklifts And Lifting Vehicles (AREA)

Abstract

The utility model provides a measure specialized tool of fork truck metal cover and electrified part interval of battery, includes casing, scale, stop device, guide cylinder device, and the casing cavity, guide cylinder device install the bottom in the casing, and the upper portion of casing is equipped with first through-hole, and scale passes first through-hole and guide cylinder device telescopic connection, and stop device one end is installed in the side of casing, and the other end stretches into in the casing, and the one end that stretches into in the casing can make the scale spacing by the scale. The scale passes the first through-hole on the casing and leads a section of thick bamboo device telescopic connection, when fork truck battery apron covers, and the apron pushes down the scale, and back is contracted down at the scale, and stop device makes the scale spacing, after opening fork truck's battery apron, the scale still can keep down the state after contracting, measures the interval between battery and the apron when covering the apron that can be convenient through this specialized tool.

Description

Special tool for measuring distance between metal cover of forklift and charged part of storage battery
Technical Field
The utility model relates to the technical field of forklift detection, in particular to a special tool for measuring the distance between a forklift metal cover and a charged part of a storage battery.
Background
The forklift belongs to special equipment, and according to the requirements of TSG 81-2022 (safety technical regulations for motor vehicles in the field (factory)), the forklift needs to perform type tests before being manufactured for the first time by a manufacturing unit or being manufactured outside the country and before any main parameter of the product exceeds the coverage range and the main structural type is changed, the forklift needs to be inspected for the first time before being put into use, and the forklift needs to be inspected periodically in the use process. Whether it is a type test, first test or periodic test, TSG 81-2022, safety regulations for motor vehicles for use in the field (factory), requires the measurement of the clearance between the metal or non-metal cover parts of the battery and the charged portion of the battery, in a forklift with a source of power being the battery. In the actual inspection process, since the gap between the two is required to be accurately measured after the cover plate is covered, no convenient detection tool is used for measuring the data.
Disclosure of Invention
The utility model aims to solve the technical problems that: the problem that exists among the above-mentioned background art is solved, provides a specialized tool of measurement fork truck metal covering and battery live part interval, can measure the interval between battery and the apron when covering the apron through this specialized tool.
In order to achieve the technical characteristics, the aim of the utility model is realized in the following way: the utility model provides a measure specialized tool of fork truck metal cover and electrified part interval of battery, includes casing, scale, stop device, guide cylinder device, the casing cavity, guide cylinder device installs the bottom in the casing, and the upper portion of casing is equipped with first through-hole, and the scale passes first through-hole and guide cylinder device telescopic connection, stop device one end is installed in the side of casing, and the other end stretches into in the casing, and the one end that stretches into in the casing can make the scale spacing by the scale.
The shell comprises a bottom plate and an upper shell, the guide cylinder device is arranged on the upper side of the bottom plate, the lower side of the upper shell is open, the first through hole is positioned on the upper side of the upper shell, the left side and the right side of the upper shell are provided with second through holes, the limiting device is connected with the upper shell through the second through holes, and the upper shell is connected to the bottom plate.
The first through hole is provided with an upward or downward guide section.
The scale is equipped with scale and connecting hole, and the scale value of scale increases gradually from last down, and the connecting hole sets up the lower extreme at the scale.
The two limiting devices are arranged, and the two limiting devices clamp the graduated scale from two sides.
The limiting device comprises a guide sleeve, an end cover, a guide nut, a guide rod, a first spring, a friction disc and a knob, wherein a sliding guide hole is axially formed in the guide sleeve, one end of the guide sleeve is open, the other end of the guide sleeve is provided with the first guide hole, an outward flange is arranged at the open end, a second guide hole is formed in the middle of the end cover, the end cover is arranged at one end of the guide sleeve, which is close to the flange, the guide nut is arranged in the sliding guide hole in a sliding mode, an external thread is arranged at one end of the guide rod, the guide rod is screwed with the guide nut through the external thread, one end of the guide rod, which is provided with the external thread, is connected with the friction disc after extending out of the first guide hole, the other end of the guide rod is connected with the knob after extending out of the second guide hole, the first spring is sleeved on the guide rod, one end of the guide nut is abutted to the guide nut, and the other end of the guide rod is abutted to the end of the end cover.
The sliding guide hole is a polygonal hole, and the outer circumferential surface of the guide nut is of a polygonal structure in sliding fit with the polygonal hole.
The friction disc comprises a supporting disc and a friction block, wherein the supporting disc is connected with one end of the guide rod, which is provided with external threads, and the friction block is arranged at one end of the supporting disc, which is far away from the guide rod.
The guide cylinder device comprises a guide cylinder, a return spring, a guide column and a pin, wherein the guide cylinder is longitudinally arranged on a bottom plate, a penetrating notch is formed in the upper end of the guide cylinder, a pin guide groove is formed in one side of the guide cylinder perpendicular to the notch, the return spring is arranged inside the guide cylinder, the guide column is arranged in the guide cylinder and located at the upper end of the return spring, one end of a graduated scale, which is provided with a connecting hole, is inserted into the notch in a sliding mode, the end portion of the graduated scale abuts against the guide column, and two ends of the pin after passing through the connecting hole are respectively connected with the pin guide groove in a sliding guide mode.
The utility model has the following beneficial effects:
1. the casing is used for installing scale, stop device, guide cylinder device, and the scale passes first through-hole and guide cylinder device telescopic connection, and when fork truck battery apron was covered, the scale was pushed down to the apron, and the length of the scale that highly plus stretching out the casing of casing add, is the interval between battery and the apron. In order to be convenient for read out the scale on the scale, stop device supports and leans on the scale, contracts the back under the scale, and stop device makes the scale spacing to after opening fork truck's battery apron, the scale still can keep the state after contracting down, thereby the reading scale value that can be convenient. The special tool can conveniently measure the distance between the storage battery and the cover plate when the cover plate is covered.
2. The first through hole is provided with an upward guiding section, the guiding section is arranged to guide the graduated scale, the graduated scale is prevented from tilting, and the graduated scale value on the graduated scale is conveniently read out through the upper end part of the guiding section.
3. The scale value of the scale is increased from top to bottom, so that the scale is convenient to read.
4. The two limiting devices are arranged, and the two limiting devices clamp the graduated scale from two sides, so that the graduated scale can be clamped in a balanced mode.
5. The guide nut drives the guide rod to stretch out and draw back through the elastic support guide nut of the first spring, so that the friction disc is driven to elastically lean against the side face of the graduated scale. When the knob is pulled, the friction disc is not contacted with the graduated scale, so that the graduated scale is convenient to rebound.
6. The guide cylinder device enables the graduated scale to stretch up and down through the reset spring.
Drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic diagram of a front view structure of the present utility model.
FIG. 3 is a schematic view of the cross-sectional structure of the graph A-a in FIG. 2.
Fig. 4 is a schematic structural view of the upper case shown in fig. 1.
Fig. 5 is a schematic view of the upper housing structure of the present utility model.
Fig. 6 is a schematic structural view of a limiting device according to the present utility model.
FIG. 7 is a schematic view of the cross-sectional structure B-B in FIG. 6.
Fig. 8 is an exploded view of the spacing device of the present utility model.
Fig. 9 is a schematic structural view of the guide bar of the present utility model.
FIG. 10 is an exploded view of the guide cylinder device of the present utility model.
Fig. 11 is a schematic structural view of a guide cylinder according to the present utility model.
FIG. 12 is a schematic view of the structure of the scale of the present utility model.
In the figure: the device comprises a shell 10, a bottom plate 11, an upper shell 12, a first through hole 121, a second through hole 122 and a guide section 123;
a scale 20, a scale 21 and a connecting hole 22;
the stopper 30, the guide bush 31, the slide guide hole 311, the first guide hole 312, the flange 313, the end cap 32, the guide nut 33, the guide rod 34, the first spring 35, the friction plate 36, the support plate 361, the friction block 362, the knob 37, the second guide hole 321, the external thread 341,
guide cylinder device 40, guide cylinder 41, notch 411, pin guide groove 412, return spring 42, guide post 43, pin 44.
Detailed Description
Embodiments of the present utility model will be further described with reference to the accompanying drawings.
Referring to fig. 1-12, a special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery comprises a shell 10, a graduated scale 20, a limiting device 30 and a guide cylinder device 40, wherein the shell 10 is hollow, the guide cylinder device 40 is installed at the bottom in the shell 10, a first through hole 121 is formed in the upper portion of the shell 10, the graduated scale 20 passes through the first through hole 121 and is in telescopic connection with the guide cylinder device 40, one end of the limiting device 30 is installed on the side face of the shell 10, the other end of the limiting device extends into the shell 10, and one end extending into the shell 10 can abut against the graduated scale 20 to limit the graduated scale 20. The casing 10 is used for installing the scale 20, the stop device 30 and the guide cylinder device 40, the scale 20 passes through the first through hole 121 and is in telescopic connection with the guide cylinder device 40, when the forklift battery cover plate covers, the cover plate presses down the scale 20, and the sum of the height of the casing 10 and the length of the scale 20 extending out of the casing 10 is the distance between the storage battery and the cover plate. In order to be convenient for read out the scale on the scale 20, stop device 30 supports and leans on scale 20, after scale 20 contracts down, stop device 30 makes scale 20 spacing to after opening fork truck's battery apron, scale 20 still can keep the state after contracting down, thereby the reading scale value that can be convenient. The special tool can conveniently measure the distance between the storage battery and the cover plate when the cover plate is covered.
Referring to fig. 3, 4 and 5, the housing 10 includes a bottom plate 11 and an upper housing 12, the guide cylinder device 40 is installed at an upper side of the bottom plate 11, a lower side of the upper housing 12 is opened, a first through hole 121 is formed at an upper side of the upper housing 12, second through holes 122 are formed at left and right sides of the upper housing 12, the stopper 30 is connected with the upper housing 12 through the second through holes 122, and the upper housing 12 is connected to the bottom plate 11 through bolts.
Referring to fig. 5, the first through hole 121 is provided with an upward guide section 123, and the guide section 123 is provided to guide the scale 20, preventing the scale 20 from tilting, and simultaneously facilitating reading of the scale value on the scale 20 through the upper end position of the guide section 123.
Referring to fig. 12, the scale 20 is provided with a scale 21 and a connection hole 22, the scale value of the scale 21 increases from top to bottom, and the connection hole 22 is provided at the lower end of the scale 20. The scale value of the scale 21 increases from top to bottom, so that the scale can be conveniently read.
When the scale 20 is retracted more, the scale value displayed on the scale 20 is small, and the total distance is obtained by adding the height of the shell 10 to the scale extending out of the shell 10.
In actual use, only one limiting device 30 can be adopted, namely, one side of the graduated scale 20 is provided with the limiting device 30, the other side is provided with a fixed bulge, the bulge is in sliding fit with the side face of the graduated scale 20, and the graduated scale 20 is abutted against the limiting device 30 at one side, so that the graduated scale 20 is limited.
Referring to fig. 3 and 4, two limiting devices 30 are provided, and the two limiting devices 30 clamp the scale 20 from both sides, thereby clamping the scale 20 in a balanced manner.
Specifically, referring to fig. 6-9, the limiting device 30 includes a guide sleeve 31, an end cover 32, a guide nut 33, a guide rod 34, a first spring 35, a friction disk 36 and a knob 37, a sliding guide hole 311 is axially formed in the guide sleeve 31, one end of the guide sleeve 31 is open, the other end of the guide sleeve 31 is provided with a first guide hole 312, an outward flange 313 is formed at the open end of the guide sleeve, a second guide hole 321 is formed in the middle of the end cover 32, the end cover 32 is mounted at one end of the guide sleeve 31 close to the flange 313, the guide nut 33 is slidably mounted in the sliding guide hole 311, an external thread 341 is formed at one end of the guide rod 34, the guide rod 34 is screwed with the guide nut 33 through the external thread 341, one end of the guide rod 34 provided with the external thread 341 extends out of the first guide hole 312 and then is connected with the friction disk 36, the other end of the guide rod 34 extends out of the second guide hole 321 and then is connected with the knob 37, the first spring 35 is sleeved on the guide rod 34, one end of the other end of the guide rod abuts against the guide nut 33, and the other end abuts against the end cover 32. The guide nut 33 drives the guide rod 34 to stretch through the elastic support guide nut 33 of the first spring 35, so that the friction disc 36 is driven to elastically lean against the side face of the graduated scale 20, and the clamping force is adjusted by rotating the knob 37 to adjust the position of the guide nut 33 on the guide rod 34. When the guide rod 34 is rotated so that the end of the guide rod 34 provided with the external thread 341 protrudes more beyond the guide sleeve 31, the friction plate 36 will have a greater force against the scale 20 due to the fixed right and left positions of the scale 20. Through the limiting devices 30 on two sides, the graduated scale 20 can be limited at any position, so that the graduated scale value on the graduated scale 20 can be conveniently read out. When knob 37 is pulled, friction disk 36 can be moved away from scale 20. During adjustment, the limiting devices 30 on both sides need to be adjusted synchronously to prevent deformation of the scale 20.
Referring to fig. 8, the sliding guide hole 311 is a polygonal hole, and the outer circumferential surface of the guide nut 33 is a polygonal structure slidably fitted with the polygonal hole. The function of the sliding guide hole 311 is that the guide nut 33 can slide in the sliding guide hole 311, and the sliding guide hole 311 can limit the rotation of the guide nut 33 when the guide rod 34 is rotated, so that the adjustment is facilitated.
Preferably, the sliding guide hole 311 is a hexagonal hole, and the guide nut 33 is an outer hexagonal nut adapted to the sliding guide hole 311.
Referring to fig. 7, the friction plate 36 includes a support plate 361 and a friction block 362, the support plate 361 is connected to an end of the guide rod 34 where the external thread 341 is provided, and the friction block 362 is installed at an end of the support plate 361 remote from the guide rod 34. Friction between the stop 30 and the scale 20 is increased by the friction blocks 362 while preventing the friction disc 36 from wearing the scale 20 during use. Preferably, the friction block 362 is a rubber plate or a silicone plate.
Referring to fig. 10 and 11, the guide cylinder device 40 includes a guide cylinder 41, a return spring 42, a guide post 43, and a pin 44, where the guide cylinder 41 is longitudinally installed on the bottom plate 11, a through notch 411 is provided at an upper end of the guide cylinder 41, a pin guide slot 412 is provided on a side of the guide cylinder 41 perpendicular to the notch 411, the return spring 42 is installed inside the guide cylinder 41, the guide post 43 is installed inside the guide cylinder 41 and is located at an upper end of the return spring 42, one end of the scale 20 provided with a connection hole 22 is slidably inserted into the notch 411, the end abuts against the guide post 43, and two ends of the pin 44 after passing through the connection hole 22 are slidably connected with the pin guide slot 412 respectively. The scale 20 can be extended and retracted up and down by the return spring 42.
The working principle of the utility model is as follows:
when in use, the clamping force of the limiting devices 30 on two sides is firstly adjusted, and the adjusting state is as follows: when the scale 20 is pressed, the scale 20 can remain stationary after the hand is released. Thereafter, the knob 37 is pulled outward, and the scale 20 pops up.
Under the state that the forklift is powered off and extinguished, the special ruler is placed on the upper side face of the storage battery, the cover plate compresses the graduated scale 20 to a certain position in the closing process of the cover plate, and after the cover plate is opened again, the distance between the cover plate and the storage battery can be measured and calculated by adding the height of the shell 10 to the graduation value on the graduated scale 20, so that the forklift is simple and convenient.

Claims (9)

1. A special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery is characterized in that: including casing (10), scale (20), stop device (30), guide cylinder device (40), the bottom in casing (10) is installed to casing (10) cavity, and guide cylinder device (40) upper portion of casing (10) is equipped with first through-hole (121), and scale (20) pass first through-hole (121) and guide cylinder device (40) telescopic connection, the side at casing (10) is installed to stop device (30) one end, and the other end stretches into in casing (10), and the one end in stretching into casing (10) can make scale (20) spacing against scale (20).
2. The special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 1, wherein: the shell (10) comprises a bottom plate (11) and an upper shell (12), the guide cylinder device (40) is arranged on the upper side of the bottom plate (11), the lower side of the upper shell (12) is open, a first through hole (121) is formed in the upper side of the upper shell (12), second through holes (122) are formed in the left side and the right side of the upper shell (12), the limiting device (30) is connected with the upper shell (12) through the second through holes (122), and the upper shell (12) is connected to the bottom plate (11).
3. A special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 2, wherein: the first through hole (121) is provided with an upward or downward guide section (123).
4. The special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 1, wherein: the scale (20) is provided with a scale (21) and a connecting hole (22), the scale value of the scale (21) increases gradually from top to bottom, and the connecting hole (22) is arranged at the lower end of the scale (20).
5. The special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 1, wherein: the two limiting devices (30) are arranged, and the two limiting devices (30) clamp the graduated scale (20) from two sides.
6. A special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 1 or 5, wherein: stop device (30) are including uide bushing (31), end cover (32), direction nut (33), guide bar (34), first spring (35), friction disc (36), knob (37), be equipped with slip guiding hole (311) in uide bushing (31) are interior, and uide bushing (31) one end is opened, and the other end is equipped with first guiding hole (312), and open one end is equipped with outside flange (313), the middle part of end cover (32) is equipped with second guiding hole (321), and end cover (32) are installed and are leaned on flange (313) one end at uide bushing (31), and the gliding installation of guide nut (33) is in slip guiding hole (311), guide bar (34) one end is equipped with external screw thread (341), and guide bar (34) are equipped with after the one end of external screw thread (341) stretches out first guiding hole (312) and is connected with friction disc (36), and the other end stretches out after second guiding hole (321) and is connected with knob (37), and first spring (35) are on guide bar (34) suit and the other end is leaned on guide bar (33).
7. The special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 6, wherein: the sliding guide hole (311) is a polygonal hole, and the outer circumferential surface of the guide nut (33) is of a polygonal structure in sliding fit with the polygonal hole.
8. The special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 6, wherein: the friction disc (36) comprises a supporting disc (361) and a friction block (362), the supporting disc (361) is connected with one end of the guide rod (34) provided with external threads (341), and the friction block (362) is arranged at one end of the supporting disc (361) far away from the guide rod (34).
9. The special tool for measuring the distance between a metal cover of a forklift and a charged part of a storage battery according to claim 1, wherein: guide cylinder device (40) are including guide cylinder (41), reset spring (42), guide post (43), pin (44), guide cylinder (41) vertically installs on bottom plate (11), guide cylinder (41) upper end is equipped with breach (411) that run through, guide cylinder (41) are last to be equipped with pin guide slot (412) with breach (411) vertically one side, reset spring (42) are installed inside guide cylinder (41), guide post (43) are installed in guide cylinder (41) and are located reset spring (42) upper end, one end that scale (20) are equipped with connecting hole (22) is gliding inserts in breach (411), and the tip supports and leans on guide post (43), pin (44) pass behind connecting hole (22) both ends respectively with pin guide slot (412) sliding guide connection.
CN202223171877.6U 2022-11-29 2022-11-29 Special tool for measuring distance between metal cover of forklift and charged part of storage battery Active CN218955650U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223171877.6U CN218955650U (en) 2022-11-29 2022-11-29 Special tool for measuring distance between metal cover of forklift and charged part of storage battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223171877.6U CN218955650U (en) 2022-11-29 2022-11-29 Special tool for measuring distance between metal cover of forklift and charged part of storage battery

Publications (1)

Publication Number Publication Date
CN218955650U true CN218955650U (en) 2023-05-02

Family

ID=86107953

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223171877.6U Active CN218955650U (en) 2022-11-29 2022-11-29 Special tool for measuring distance between metal cover of forklift and charged part of storage battery

Country Status (1)

Country Link
CN (1) CN218955650U (en)

Similar Documents

Publication Publication Date Title
CN218955650U (en) Special tool for measuring distance between metal cover of forklift and charged part of storage battery
CN109141169B (en) Thread pitch diameter runout gauge
CN215726575U (en) Device for detecting sealing performance of outer water cutting of vehicle door glass
CN211205605U (en) Force measuring device
CN214470960U (en) Fixing device for electronic instrument detection
CN219933643U (en) Retractable thickness gauge support
CN209927442U (en) Automobile parts resistance to compression detection device
CN221123274U (en) Device for rapidly detecting axial clearance of motor spindle
CN210180367U (en) Part verticality detection device
CN210347323U (en) Rubber pipeline tensile strength detection device
CN209524865U (en) Tool for detecting screw perpendicularity
CN211576566U (en) Door closing force detection equipment for vehicle door
CN220603210U (en) Building materials hardness detection device
CN215572857U (en) Calibrating device for extensometer
CN207425754U (en) A kind of breaker depression bar assembly
CN219223546U (en) Relative position positioner for air shock absorption end head and hanging ring
CN216593084U (en) Multifunctional standard ruler for detecting quality of house building engineering
CN205374173U (en) Pulling -force testing machine
CN220251585U (en) Compressor rear cover pressing device with detection function
CN212425037U (en) Elevator door lock meshing length measuring device
CN221088303U (en) Novel grating ruler
CN220508677U (en) Tank strength detection device
CN218974027U (en) Device with pressure measurement and tension measurement functions
CN220289665U (en) Detection touch end of leakage current detector
CN213023026U (en) Exempt from to uncap gas detection instrument of adjustment calibration

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant