CN109399499A - A kind of scissor-type energy saving lift device - Google Patents
A kind of scissor-type energy saving lift device Download PDFInfo
- Publication number
- CN109399499A CN109399499A CN201811316907.3A CN201811316907A CN109399499A CN 109399499 A CN109399499 A CN 109399499A CN 201811316907 A CN201811316907 A CN 201811316907A CN 109399499 A CN109399499 A CN 109399499A
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- Prior art keywords
- yoke
- slide bar
- hinged
- interior
- outer yoke
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- 230000007423 decrease Effects 0.000 description 9
- 230000000630 rising effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/065—Scissor linkages, i.e. X-configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The present invention relates to a kind of scissor-type energy saving lift device, including lower supporting plate, upper backup pad, outer yoke and interior yoke, the outer yoke includes left outside yoke and right outer yoke；Be equipped between the top of yoke in the top of the left inside yoke, the right side with yoke pivot joint and horizontally disposed upper shaft in left inside yoke, the right side, be connected with supporting beam in the upper shaft；It is connected with horizontally disposed lower supporting beam between the lower part of the left inside yoke, the lower part of the outer yoke in the right side, the cylinder body of the power cylinder and lower supporting beam are hinged, and the piston rod of the power cylinder and upper supporting beam are hinged；Intermediate beam is installed between the left and right outer yoke, the middle part of the intermediate beam and left and right slide bar is pivotally connected, the upper supporting beam is hinged with one end of left and right connecting rods respectively, the other end of the left and right connecting rods is hinged with one end of left and right slide bar respectively, and the other end of the left and right slide bar is respectively facing the lower part direction of left and right outer yoke.The device not only light energy-saving and laborsaving.
Description
Technical field
The present invention relates to a kind of scissor-type energy saving lift devices, belong to agricultural machinery technological field.
Background technique
Many occasions need to use lifting device in life at present, such as overhead working lifting platform, agricultural picking lifting
Platform, container cargo distribution carrying trolley etc. not only save artificial, manpower, and can reduce operating cost, and application is very universal.
Existing lifting lifting device is substantially to be superimposed to be formed using scissor structure, the requirement of foundation adjustable height, selection single tine,
Double forks or multi-fork structure, Chinese patent CN201810340775.1 disclose a kind of automobile-used lifting device of agricultural greenhouse lifting, adopt
It with double fork structures, is moved, is realized freely and stable elevating movement in guide rail using sliding block；Chinese patent
A kind of good multistage fork series connection hoistable platform of small space passability is disclosed in CN201810285058.3, using oil pressure actuated
Control lifting.The power of retrieval discovery scissor is all used substantially based on hydraulic cylinder or electric cylinder promotion, and portioned product uses twin-tub
Or multi-cylinder is integrated, to realize specific high thrust.
But existing platform lifting hydraulic cylinder or electric cylinder generally all directly with platform Hard link, it is no it is any auxiliary it is laborsaving
Measure directly contributes at least following two negative consequence: first is that the selection standard of the pumping plant or motor of cylinder body and drivig cylinder is all
It much higher than design requirement, wastes one's talent on a petty job, cost sharply increases；Second is that hoistable platform overall weight is caused to increase, heavy laborious, object
Stream transport is inconvenient.
Summary of the invention
The invention solves technical problems to be: providing a kind of light energy-saving and labour-saving scissor-type platform lifting device.
In order to solve the above-mentioned technical problem, technical solution proposed by the present invention is: a kind of scissor-type energy saving lift device, packet
Lower supporting plate, upper backup pad, outer yoke, interior yoke, power cylinder, left connecting rod, right connecting rod, left slide bar and right slide bar are included, it is described outer
Yoke includes left outside yoke and right outer yoke, and the interior yoke includes yoke in left inside yoke and the right side, the upper end of the outer yoke
Hinged with upper backup pad, the lower end of the outer yoke is resisted against on lower supporting plate, and the lower end of the interior yoke and lower supporting plate are cut with scissors
It connects, the upper end of the interior yoke offsets with upper backup pad；The outer yoke and the interior yoke are hinged and its hinged point
In the middle part of the outer yoke and interior yoke, i.e., it is hinged in the middle part of the middle part of the described left outside yoke and the left inside yoke,
It is hinged in the middle part of the middle part of the outer yoke in the right side and yoke in the right side；Yoke in the top of the left inside yoke, the right side
Be equipped between top with yoke pivot joint and horizontally disposed upper shaft in left inside yoke, the right side, be connected in the upper shaft
Supporting beam；Horizontally disposed lower supporting beam, the power are connected between the lower part of the left inside yoke, the lower part of the outer yoke in the right side
The cylinder body of cylinder and lower supporting beam are hinged, and the piston rod of the power cylinder and upper supporting beam are hinged；Pacify between the left and right outer yoke
Equipped with left and right outer yoke pivot joint and horizontally disposed intermediate beam, the intermediate beam are located at the middle part of the outer yoke, interior yoke
Between hinge joint and upper supporting beam；The middle part of the intermediate beam and left and right slide bar is pivotally connected, the upper supporting beam respectively with
One end of left and right connecting rods is hinged, and the other end of the left and right connecting rods is hinged with one end of left and right slide bar respectively, described left and right
The lower part direction that the other end of slide bar is respectively facing left and right interior yoke extends；At work, the left slide bar, right slide bar have
The second state for bearing against the first state on left and right interior yoke and being separated respectively with left and right interior yoke.
The further improvement of above-mentioned technical proposal is: the lower part of the left and right interior yoke is respectively equipped with along its length
Left and right sliding rail, the left and right slide bar are just born against on left and right sliding rail when being in first state.Preferably, the left side
The end of slide bar towards left inside yoke lower part is equipped with the left slide bar wheel to match with left sliding rail, yoke in the right slide bar direction right side
The end of lower part is equipped with the right slide bar wheel to match with right sliding rail.
The further improvement of above-mentioned technical proposal is: the hinged place of yoke and lower supporting plate is equipped with upper limit in the right side
It switchs, yoke is equipped with the screwing cooperated with upper limit switch in the right side；The left inside yoke and lower supporting plate it is hinged
Place is equipped with lower position switch, is equipped with the elastic switch that can be swung up and down on the lower position switch；The upper limit switch, under
Opening and closing of the limit switch to control power cylinder.
Preferably, the lower supporting plate is mounted on the chassis equipped with traveling wheel.
Preferably, the left and right interior yoke is topmost respectively equipped with a upper roller, the left outside yoke, right outer yoke
Bottom one bottom roller is respectively installed.
In the use of the present invention, the left and right sliding rail is tightly attached to one with left and right slide bar wheel respectively when being in original state
It rises, the left slide bar described at this time, right slide bar are in first state.As the piston rod of power cylinder extends, upper backup pad is gradually under
Support plate separation makes the left slide bar, right slide bar be in the second state, and the angle between the inside and outside yoke of the same side is also gradually
Increase, leading to left and right slide bar wheel, gradually upward sliding is in the process, left and right to leaving sliding rail on left and right sliding rail respectively
Sliding rail load-bearing the weight of partial power cylinder piston rod thrust.During upper backup pad continues rising, left and right slide bar wheel with
Left and right sliding rail is kept completely separate, and upper backup pad continues to rise, until screwing stops rising when touching upper limit switch.Similarly,
During the decline, left and right slide bar wheel and left and right sliding rail experience are kept completely separate, contact, sliding onto and fit together completely
(at this point, lower screw stops decline when touching lower position switch), left and right cunning during contacting, sliding onto fitting completely
Bar wheel is pressed respectively against on left and right sliding rail, so that decrease speed uniform speed slow, can reduce the impact of decline, increases lifting device
Robust motion.
The invention has the beneficial effects that: 1) apparatus of the present invention in lifting heavy can reduce the choosing of hydraulic pump or motor
Type power effectively reduces energy consumption, reduces and designs and produces cost, remarkable benefit；It can guarantee that total is flat in decline
Steady landing, supportive is good, no impact, and reliability increases.2) structure of the invention is simple, and design cost is lower；Have simultaneously upper and lower
Limit function, hoisting depth can adjust according to demand, and safety is good, has good promotion and application value.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is the schematic front view of the embodiment of the present invention.
Fig. 2 is the right side view of the embodiment of the present invention.
Fig. 3 is the sectional view along A-A of Fig. 1.
Fig. 4 is the scheme of installation of right slide bar.
Fig. 5 is the side view of Fig. 4.
Fig. 6 is the contact condition schematic diagram of right slide bar wheel Yu right sliding rail.
Appended drawing reference: 1 chassis, 2 lower supporting plates, 3 upper limit switches, 4 screwings, 5 right sliding rails, 6 right outer yokes prop up on 7
Fagging, 8 weights, 9 right connecting rods, 10 cylinder bodies, yoke in 11 right sides, 12 bottom rollers, 13 right slide bars, 14 upper shafts, 15 upper rollers, on 16
Supporting beam, 17 intermediate beams, 18 left slide bars, 19 attachment beams, 20 lower position switch, 21 lower supporting beams, 22 lower rotary shafts, 23 left outside forks
Arm, 24 left inside yokes, the right sliding rod frame of 13-1, the right slide bar wheel of 13-2.
Specific embodiment
Embodiment
The scissor-type energy saving lift device of the present embodiment is left and right symmetrical structure, as shown in Figure 1-3, include lower supporting plate
2, upper backup pad 7, outer yoke, interior yoke, power cylinder 10, left connecting rod, right connecting rod 9, left slide bar 18 and right slide bar 13, the lower branch
Fagging 2 is mounted on the chassis 1 equipped with traveling wheel, to have self-propelled function.
The outer yoke includes left outside yoke 23 and right outer yoke 6, and the interior yoke includes left inside yoke 24 and right interior fork
Arm 11, the upper end of the outer yoke and upper backup pad 7 are hinged, and the lower end of the outer yoke is resisted against on lower supporting plate 2, described interior
The lower end of yoke and lower supporting plate 2 are hinged, and upper end and the upper backup pad 7 of the interior yoke offset；The outer yoke and interior yoke
It is hinged and its hinge joint is located at the middle part of the outer yoke and interior yoke, i.e., the middle part and the left side of the described left outside yoke 23
The middle part of interior yoke 24 is hinged, and the middle part of the outer yoke 6 in the right side and the middle part of yoke 11 in the right side are hinged.It is described
Left and right interior yoke is topmost respectively equipped with a upper roller 15, the left outside yoke, right outer yoke bottom be articulated with level
Lower rotary shaft 22, the both ends of lower rotary shaft 22 are respectively equipped with a bottom roller 12.
Be equipped between the top of yoke 11 in the top of the left inside yoke 24, the right side and left inside yoke 24, the right side in yoke
11 pivot joints and horizontally disposed upper shaft 14, are connected with supporting beam 16 in the upper shaft 14, with the rotation of upper shaft 14
Movement, upper supporting beam 16 also move therewith.
It is connected with horizontally disposed lower supporting beam 21 between the lower part of yoke 11 in the lower part of the left inside yoke 24, the right side,
The cylinder body of the power cylinder 10 and lower supporting beam 21 are hinged, and the piston rod of the power cylinder 10 and upper supporting beam 16 are hinged.Power
Cylinder 10 can choose hydraulic cylinder, electric cylinder or cylinder etc..
It is equipped between the left and right outer yoke 23,6 and the left and right outer pivot joint of yoke 23,6 and horizontally disposed intermediate beam
17, the intermediate beam 17 is located between the middle part hinge joint and upper supporting beam 16 of the outer yoke, interior yoke.
The intermediate beam 17 is pivotally connected with left slide bar 18, right slide bar 13, and left slide bar 18 and right slide bar 13 pass through attachment beam 19
It is fixed together, two slide bars can all surround 17 rotary motion of intermediate beam.The upper supporting beam 16 respectively with left connecting rod, right connecting rod
9 one end is hinged, and the other end of the left and right connecting rods is hinged with one end of left and right slide bar respectively, the left and right slide bar it is another
The lower part direction that one end is respectively facing left and right interior yoke extends.In this way, driving two connecting rods and two as upper shaft 14 rotates
A slide bar is respectively around the hinge joint rotary motion of itself.
At work, the left slide bar 18, right slide bar 13 have bear against first state on left and right interior yoke with
And the second state separated respectively with left and right interior yoke.
The present embodiment can also make following improve: 1) lower part of the left and right interior yoke 24,11 is distinguished along its length
Equipped with left sliding rail, right sliding rail 5, the left and right slide bar is just born against on left and right sliding rail when being in first state.It is preferred that
, the end of the left slide bar towards left inside yoke lower part is equipped with the left slide bar wheel to match with left sliding rail, the right slide bar court
The end of interior yoke lower part is equipped with the right slide bar wheel to match with right sliding rail to the right.
Left slide bar 18 is identical with the mounting structure of right slide bar 13, is illustrated by taking right slide bar 13 as an example below, such as Fig. 4 and figure
Shown in 5, right sliding rod frame 13-1, which is sleeved on intermediate beam 17, forms pin-jointed structure, and right slide bar 13 and right sliding rod frame 13-1 are affixed, right
The end of slide bar 13 is equipped with right slide bar wheel 13-2.
2) it is described the right side in the hinged place of yoke and lower supporting plate be equipped with upper limit switch 3, it is described the right side in yoke be equipped with
The screwing 4 that upper limit switch 3 cooperates；The hinged place of the left inside yoke and lower supporting plate is equipped with lower position switch 20, lower limit
The elastic switch that can be swung up and down is installed on bit switch 20.Upper limit switch 3 and lower position switch 20 are to control power cylinder
Opening and closing.
When the present embodiment is in use, original state is as shown in state I in Fig. 6, left and right sliding rail respectively with left and right slide bar wheel
It is close together, the left slide bar described at this time, right slide bar are in first state.As the piston rod of power cylinder extends, upper backup pad
Gradually separating with lower supporting plate makes the left slide bar, right slide bar be in the second state, the folder between the inside and outside yoke of the same side
Angle is also gradually increased, cause left and right slide bar wheel respectively on left and right sliding rail gradually upward sliding to leaving sliding rail (shape in such as Fig. 6
Shown in state II), in the process, left and right sliding rail load-bearing the weight of partial power cylinder piston rod thrust.Continue in upper backup pad
During rising, left and right slide bar wheel and left and right sliding rail are kept completely separate (as shown in state I II in Fig. 6), on upper backup pad continues
It rises, until screwing stops rising when touching upper limit switch.
Similarly, during the decline, left and right slide bar wheel is kept completely separate with left and right sliding rail experience, contacts, has slid onto
Fit together (at this point, lower screw stops decline when touching lower position switch) entirely, is contacting, is sliding onto the mistake being bonded completely
Journey middle left and right slide bar wheel is pressed respectively against on left and right sliding rail, so that decrease speed uniform speed slow, can reduce the impact of decline, is increased
Add the robust motion of lifting device.
The present invention is not limited to the above embodiment the specific technical solution, and in addition to the implementation, the present invention may be used also
To there is other embodiments.For those skilled in the art, all within the spirits and principles of the present invention, made
The technical solution of the formation such as what modification, equivalent replacement, improvement, should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of scissor-type energy saving lift device, including lower supporting plate, upper backup pad, outer yoke and interior yoke, the outer yoke
Including left outside yoke and right outer yoke, the interior yoke include left inside yoke and be right in yoke, the upper end of the outer yoke with it is upper
Support plate is hinged, and the lower end of the outer yoke is resisted against on lower supporting plate, and the lower end of the interior yoke and lower supporting plate are hinged, institute
The upper end and upper backup pad for stating interior yoke offset；The outer yoke and the interior yoke are hinged and its hinge joint is positioned at described
The middle part of outer yoke and interior yoke is hinged in the middle part of the middle part of that is, described left outside yoke and the left inside yoke, the right side
It is hinged in the middle part of the middle part of outer yoke and yoke in the right side；It is characterized by also including power cylinder, left connecting rod, right companies
Bar, left slide bar and right slide bar；
Be equipped between the top of yoke in the top of the left inside yoke, the right side and left inside yoke, the right side in yoke pivot joint and horizontal
The upper shaft of setting is connected with supporting beam in the upper shaft；
Horizontally disposed lower supporting beam, the power cylinder are connected between the lower part of the left inside yoke, the lower part of the outer yoke in the right side
Cylinder body and lower supporting beam it is hinged, the piston rod of the power cylinder and upper supporting beam are hinged；
It is equipped between the left and right outer yoke and left and right outer yoke pivot joint and horizontally disposed intermediate beam, the intermediate beam position
In the outer yoke, interior yoke middle part hinge joint and upper supporting beam between；
The middle part of the intermediate beam and left and right slide bar is pivotally connected, and the upper supporting beam is hinged with one end of left and right connecting rods respectively,
The other end of the left and right connecting rods is hinged with one end of left and right slide bar respectively, and the other end of the left and right slide bar is respectively facing
The lower part direction of left and right interior yoke extends；At work, the left slide bar, right slide bar, which have, bears against in left and right interior yoke
On first state and the second state for being separated respectively with left and right interior yoke.
2. scissor-type energy saving lift device according to claim 1, it is characterised in that: the lower part of the left and right interior yoke
It is respectively equipped with left and right sliding rail along its length, the left and right slide bar is just born against when being in first state left and right
On sliding rail.
3. scissor-type energy saving lift device according to claim 2, it is characterised in that: the left slide bar is towards left inside yoke
The end of lower part is equipped with the left slide bar wheel that matches with left sliding rail, the end of the right slide bar towards yoke lower part in the right side be equipped with
The right slide bar wheel that right sliding rail matches.
4. -3 described in any item scissor-type energy saving lift devices according to claim 1, it is characterised in that: the lower supporting plate
It is mounted on the chassis equipped with traveling wheel.
5. -3 described in any item scissor-type energy saving lift devices according to claim 1, it is characterised in that: described left and right interior
Yoke is topmost respectively equipped with a upper roller, the left outside yoke, right outer yoke bottom one bottom roller is respectively installed.
6. -3 described in any item scissor-type energy saving lift devices according to claim 1, it is characterised in that: yoke in the right side
It is equipped with upper limit switch with the hinged place of lower supporting plate, yoke is equipped with the screwing cooperated with upper limit switch in the right side；
The hinged place of the left inside yoke and lower supporting plate is equipped with lower position switch, is equipped with and can swing up and down on the lower position switch
Elastic switch；The opening and closing of the upper limit switch, lower position switch to control power cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811316907.3A CN109399499B (en) | 2018-11-07 | 2018-11-07 | Scissor type energy-saving lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811316907.3A CN109399499B (en) | 2018-11-07 | 2018-11-07 | Scissor type energy-saving lifting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109399499A true CN109399499A (en) | 2019-03-01 |
| CN109399499B CN109399499B (en) | 2024-03-22 |
Family
ID=65471773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811316907.3A Active CN109399499B (en) | 2018-11-07 | 2018-11-07 | Scissor type energy-saving lifting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109399499B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0697367A1 (en) * | 1994-08-16 | 1996-02-21 | MAHA Maschinenbau Haldenwang GmbH & Co. KG | Scissor lift platform |
| DE19526596A1 (en) * | 1995-07-21 | 1997-01-23 | Reinhard Clamor | Crossed-strut lifting table |
| CN205170283U (en) * | 2015-11-30 | 2016-04-20 | 苏州市康鼎升降机械有限公司 | Fixed hydraulic lift |
| CN205990212U (en) * | 2016-08-18 | 2017-03-01 | 浙江吉利控股集团有限公司 | A kind of automobile lifting machine |
| CN209276081U (en) * | 2018-11-07 | 2019-08-20 | 农业部南京农业机械化研究所 | A kind of scissor-type energy saving lift device |
-
2018
- 2018-11-07 CN CN201811316907.3A patent/CN109399499B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0697367A1 (en) * | 1994-08-16 | 1996-02-21 | MAHA Maschinenbau Haldenwang GmbH & Co. KG | Scissor lift platform |
| DE19526596A1 (en) * | 1995-07-21 | 1997-01-23 | Reinhard Clamor | Crossed-strut lifting table |
| CN205170283U (en) * | 2015-11-30 | 2016-04-20 | 苏州市康鼎升降机械有限公司 | Fixed hydraulic lift |
| CN205990212U (en) * | 2016-08-18 | 2017-03-01 | 浙江吉利控股集团有限公司 | A kind of automobile lifting machine |
| CN209276081U (en) * | 2018-11-07 | 2019-08-20 | 农业部南京农业机械化研究所 | A kind of scissor-type energy saving lift device |
Non-Patent Citations (1)
| Title |
|---|
| 李鹏波;张长伟;薛雪;: "轻型剪叉式升降平台结构分析与优化设计", 建设机械技术与管理, no. 08 * |
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| Publication number | Publication date |
|---|---|
| CN109399499B (en) | 2024-03-22 |
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