CN111284535A - Transfer trolley - Google Patents
Transfer trolley Download PDFInfo
- Publication number
- CN111284535A CN111284535A CN201811486765.5A CN201811486765A CN111284535A CN 111284535 A CN111284535 A CN 111284535A CN 201811486765 A CN201811486765 A CN 201811486765A CN 111284535 A CN111284535 A CN 111284535A
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- CN
- China
- Prior art keywords
- bevel gear
- vertical beam
- bracket
- driven wheel
- crank
- 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.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2203/00—Grasping, holding, supporting the objects
- B62B2203/10—Grasping, holding, supporting the objects comprising lifting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2203/00—Grasping, holding, supporting the objects
- B62B2203/70—Comprising means for facilitating loading or unloading
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a transfer trolley which comprises a trolley frame main body and wheels. The frame body comprises a first vertical beam, a second vertical beam and an adjustable bracket connected with the first vertical beam and the second vertical beam. Wheels are arranged at the bottom of the first vertical beam and the second vertical beam. It is possible to carry the test specimen and the jig by performing a flat push operation in a narrow space.
Description
Technical Field
The invention belongs to the technical field of testing of electromechanical products, and particularly relates to a transfer trolley.
Background
In the process of carrying out strengthening test, accelerated life test and accelerated degradation test on electromechanical products, temperature stress, vibration stress and various stresses are often selected for comprehensive test. There are more test equipment in the laboratory, however, by survey sample and anchor clamps need often carry and bypass the interior test equipment of laboratory and fill in narrow and small environment case. However, the use of manpower and cranes is subject to site limitations and safety risks.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a transfer trolley which can realize the flat push operation in a narrow space to convey a test sample and a clamp.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a transfer vehicle includes a frame body and wheels. The frame body comprises a first vertical beam, a second vertical beam and an adjustable bracket connected with the first vertical beam and the second vertical beam. Wheels are arranged at the bottom of the first vertical beam and the second vertical beam.
According to the transfer trolley disclosed by the invention, the frame main body only consists of the two vertical beams and the adjustable bracket, the structure is simple, the flat pushing operation can be realized in a narrow space, the cost is low, and the whole operation process does not need electricity, so that the safety coefficient is higher. The sample and the clamp can be placed on the bracket, and the transfer trolley can advance through a determined obstacle by adjusting the height of the adjustable bracket.
With respect to the above technical solution, further improvements as described below can be made.
In a preferred embodiment of the transfer vehicle according to the invention, the wheels comprise universal wheels.
The steering and the moving of the transfer trolley can be very conveniently realized through the universal wheels.
Further, in a preferred embodiment, a back plate is provided between the first vertical beam and the second vertical beam.
Through setting up the backplate, can increase the structural strength and the stability of frame main part on the one hand, on the other hand can play the guard action to placing test sample and anchor clamps on the bracket, prevents that test sample and anchor clamps from dropping.
Further, in a preferred embodiment, a top cover is arranged at the top of the frame main body.
Through setting up the overhead guard, can further play the guard action to placing test sample and anchor clamps on the bracket, prevent that test sample and anchor clamps from receiving the collision of other equipment in the laboratory.
Further, in a preferred embodiment, the bracket is provided with a lifting device.
The lifting device can conveniently realize the lifting of the adjustable bracket, so that the height of the bracket can be conveniently adjusted.
Specifically, in a preferred embodiment, the lifting device comprises a first bevel gear, a second bevel gear, a driving wheel, a driven wheel, a screw rod and a first crank. Wherein, first bevel gear, action wheel and driven round of fixing on the frame main part. The first bevel gear and the drive wheel rotate in the horizontal direction, and the first bevel gear is engaged with the drive wheel. The driving wheel drives the driven wheel to rotate through the belt, the screw rod penetrates through the driven wheel, the screw rod is connected with the bracket, and the driven wheel drives the bracket to move up and down along the screw rod. The second bevel gear is engaged with the first bevel gear, and the second bevel gear rotates in the vertical direction. The first crank can drive the second bevel gear to rotate.
The bevel gear is driven to rotate through the cranking of the first crank, the bevel gear rotates to drive the driving wheel, the driven wheel and the left and right screw rods to rotate in sequence, and the driven wheel drives the bracket to move up and down along the screw rods. The driving wheel and the driven wheel can be controlled by the limiting device to rotate freely and cannot move up and down. The bottom end of the screw rod can also control the linkage between the screw rod and the bracket by arranging a limiting device. The lifting mechanism consisting of the bevel gears, the driving wheels, the driven wheels, the belts, the screw rods and the crank is convenient to operate, and external electricity taking is not needed.
Further, in a preferred embodiment, the lifting device further comprises a separation preventing cap arranged at the bottom of the bracket for preventing the screw rod from rotating.
Through setting up the anticreep cap, can prevent on the one hand that the lead screw from rotating and can't realize that the bracket reciprocates along the lead screw, on the other hand can also prevent that the bracket from coming out from the lead screw in the downward movement in-process.
Further, in a preferred embodiment, the bottom of the bracket is provided with a pushing device. Through the design of the pushing device, the sample and the clamp can be operated conveniently and rapidly to move back and forth.
Specifically, in a preferred embodiment, the pushing device comprises a track, a transmission gear, a transmission chain and a second crank. The crawler belt is arranged on the bracket, the transmission chains are arranged on two sides of the crawler belt, and the transmission gears are embedded with the transmission chains. The second crank can drive the transmission gear to rotate.
The chain gear is adopted for transmission, so that the transmission capacity is strong, the strength is high, and the tearing is not easy. When the sample volume is large and the space in the experiment box is small, the sample can be conveniently fed into the experiment box, so that the problem that the personnel are difficult to carry due to insufficient space operation after the sample is placed in the experiment box is solved. In addition, in the whole pushing process, external power taking is not needed.
Further, in a preferred embodiment, the lower portion of the track is provided with a roller for supporting a weight. Through setting up the cylinder, when the track middle part was arranged in to the heavy object, can prevent effectively that the track is sunken to be out of shape.
Compared with the prior art, the invention has the advantages that: it is possible to carry the test specimen and the jig by performing a flat push operation in a narrow space.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 schematically illustrates the overall structure of a transfer vehicle according to an embodiment of the present invention;
FIG. 2 schematically illustrates the overall structure of another perspective of the transfer vehicle of an embodiment of the present invention;
FIG. 3 schematically illustrates a front view of a transfer vehicle according to an embodiment of the present invention;
FIG. 4 schematically illustrates the use of the transfer vehicle of an embodiment of the present invention in conjunction with an environmental chamber;
fig. 5 schematically shows a first partial structure of a lifting device of an embodiment of the invention;
fig. 6 schematically shows a second partial structure of the lifting device of the embodiment of the invention;
fig. 7 schematically shows a third partial structure of the lifting device of the embodiment of the invention;
FIG. 8 schematically illustrates a track partial structure according to an embodiment of the invention;
FIG. 9 schematically illustrates a first partial structure of a pushing device of an embodiment of the present invention;
fig. 10 schematically shows a second partial structure of the pushing device of the embodiment of the present invention;
fig. 11 schematically shows a third partial structure of the pushing device of the embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained in detail with reference to the figures and the embodiments without thereby limiting the scope of protection of the invention.
Fig. 1 schematically illustrates the overall construction of a transfer vehicle 10 in accordance with an embodiment of the present invention. Figure 2 schematically illustrates another perspective overall configuration of the transfer vehicle 10 of an embodiment of the present invention. Figure 3 schematically illustrates a front view of the transfer vehicle 10 of an embodiment of the present invention. Figure 4 schematically illustrates the use of the transfer vehicle 10 of an embodiment of the present invention in conjunction with an environmental chamber. Fig. 5 schematically shows a first partial structure of the lifting device 3 according to an embodiment of the invention. Fig. 6 schematically shows a second partial structure of the lifting device 3 of the embodiment of the present invention. Fig. 7 schematically shows a third partial structure of the lifting device 3 according to the embodiment of the present invention. Fig. 8 schematically shows a partial structure of the crawler belt 41 according to the embodiment of the present invention. Fig. 9 schematically shows a first partial structure of the pushing device 4 of the embodiment of the present invention. Fig. 10 schematically shows a second partial structure of the pushing device 4 of the embodiment of the present invention. Fig. 11 schematically shows a third partial structure of the pushing device 4 according to the embodiment of the present invention.
As shown in fig. 1 to 4, a transfer vehicle 10 according to an embodiment of the present invention includes a vehicle frame body 1 and wheels 2. The frame body 1 is composed of a first vertical beam 11, a second vertical beam 12 and an adjustable bracket 13 connected with the first vertical beam 11 and the second vertical beam 12. The wheels 2 are arranged at the bottom of the first vertical beam 11 and the second vertical beam 12. According to the transfer trolley provided by the embodiment of the invention, the frame main body is only composed of the two vertical beams and the adjustable bracket, the structure is simple, the flat pushing operation can be realized in a narrow space, the cost is low, and the whole operation process does not need electricity, so that the safety coefficient is higher. The sample and the clamp can be placed on the bracket, and the transfer trolley can advance through a determined obstacle by adjusting the height of the adjustable bracket. Further, in a preferred embodiment, a back plate 14 is provided between the first vertical beam 11 and the second vertical beam 12. Through setting up the backplate, can increase the structural strength and the stability of frame main part on the one hand, on the other hand can play the guard action to placing test sample and anchor clamps on the bracket, prevents that test sample and anchor clamps from dropping. Further, in a preferred embodiment, a top cover 15 is provided on the top of the frame body 1. Through setting up the overhead guard, can further play the guard action to placing test sample and anchor clamps on the bracket, prevent that test sample and anchor clamps from receiving the collision of other equipment in the laboratory.
In the present embodiment, the wheel 2 preferably includes a universal wheel 21 and a front wheel 22. The front wheel 22 is disposed at the bottom of the frame body 1 via the cross member 16, and is disposed in a direction away from the first vertical beam 11 and the second vertical beam 12. Universal wheels 21 are arranged at the bottom of the first vertical beam 11 and the second vertical beam 12, respectively. The steering and moving of the transfer trolley can be very conveniently realized through the front wheels and the universal wheels, the stability and reliability of the transfer trolley in the moving process can be ensured, and the samples or the clamps can be effectively prevented from falling.
As shown in fig. 1 to 4, further, in a preferred embodiment, the lifting device 3 is provided on the carriage 13. The lifting device can conveniently realize the lifting of the adjustable bracket, so that the height of the bracket can be conveniently adjusted. Specifically, in a preferred embodiment, the lifting device 3 includes a first bevel gear 31, a second bevel gear 32, a driving wheel 33, a driven wheel 34, a lead screw 35, and a first crank 36. Wherein, the first bevel gear 31, the driving wheel 33 and the driven wheel 34 are fixed on the frame body 1. The first bevel gear 31 and the driver 33 rotate in the horizontal direction, and the first bevel gear 31 is engaged with the driver 33. The driving wheel 33 drives the driven wheel 34 to rotate through the belt 311, the screw rod 35 penetrates through the driven wheel 34, the screw rod 35 is connected with the bracket 13, and the driven wheel 34 drives the bracket 13 to move up and down along the screw rod 35. The second bevel gear 32 is engaged with the first bevel gear 31, and the second bevel gear 32 rotates in the vertical direction. The first crank 36 is capable of rotating the second bevel gear 32.
As shown in fig. 5 to 7, preferably, the first bevel gear 31 and the driving wheel 33 are fixed on the back plate 14 by a mounting shaft 37. Specifically, the mounting shaft 37 passes through the first bevel gear 31 and the driving wheel 33, and both ends of the mounting shaft 37 are fixed to the back plate 14 by the lugs 38 so that the mounting shaft 37 can only rotate. As shown in fig. 5, the first bevel gear 31 and the second bevel gear 32 are respectively connected to the mounting shaft 37 by a spline structure. The joints of the first bevel gear 31 and the second bevel gear 32 and the mounting shaft 37 are provided with grooves for mounting the keys 39. The mounting shaft 37 and the driving wheel 33 are machined by a turning process and are integrally formed. The driven pulley 34 is engaged with the back plate 14 by means of ball bearings 310. The inner race of ball bearing 310 nests with the driven wheel 34. The outer race of ball bearing 310 is captured on the bearing housing. The bearing blocks are welded to the backing plate 14. The first crank 36 is connected to the second bevel gear 32 through the back plate 14 for rotational operation. The driven wheel 34 is internally threaded to match the lead screw 35. The screw 35 is restricted from rotating by the anti-slip cap 312 at the bottom of the bracket 13. The driven wheel 34 rotates, and the screw rod 35 moves up and down to drive the bracket 13 to move up and down. The bevel gear is driven to rotate through the cranking of the first crank, the bevel gear rotates to drive the driving wheel, the driven wheel and the left and right screw rods to rotate in sequence, and the driven wheel drives the bracket to move up and down along the screw rods. The driving wheel and the driven wheel can be controlled by the limiting device to rotate freely and cannot move up and down. The bottom end of the screw rod can also control the linkage between the screw rod and the bracket by arranging a limiting device. The lifting mechanism consisting of the bevel gears, the driving wheels, the driven wheels, the belts, the screw rods and the crank is convenient to operate, and external electricity taking is not needed. Through setting up the anticreep cap, can prevent on the one hand that the lead screw from rotating and can't realize that the bracket reciprocates along the lead screw, on the other hand can also prevent that the bracket from coming out from the lead screw in the downward movement in-process. Preferably, bearings are designed into the driven wheel 34, so that resistance against rotation can be reduced. And the driving wheel 33, the driven wheel 34, the belt 311 and the screw 35 are symmetrically arranged on the bracket 13 in two groups, so that the lifting process of the lifting device 3 is more stable and reliable.
As shown in fig. 1 to 4 and 8 to 11, further, in a preferred embodiment, the bottom of the bracket 13 is provided with the pushing device 4. Through the design of the pushing device, the sample and the clamp can be operated conveniently and rapidly to move back and forth. Specifically, in a preferred embodiment, the pushing device 4 includes a track 41, a transmission gear 42, a transmission chain 43, and a second crank 44. Wherein, the caterpillar track 41 is arranged on the bracket 13, the transmission chain 43 is arranged at both sides of the caterpillar track 41, and the transmission gear 42 is embedded with the transmission chain 43. The second crank 44 is capable of rotating the drive gear 42. The chain gear is adopted for transmission, so that the transmission capacity is strong, the strength is high, and the tearing is not easy. When the sample volume is large and the space in the experiment box is small, the sample can be conveniently fed into the experiment box, so that the problem that the personnel are difficult to carry due to insufficient space operation after the sample is placed in the experiment box is solved. In addition, in the whole pushing process, external power taking is not needed.
Further, as shown in fig. 9, in a preferred embodiment, the lower portion of the caterpillar 41 is provided with a roller 45 for supporting a weight. Through setting up the cylinder, when the track middle part was arranged in to the heavy object, can prevent effectively that the track is sunken to be out of shape. Specifically, as shown in fig. 8 and 11, the crawler belt 41 includes a plurality of metal strips 411, each metal strip 411 includes an elongated metal rod 412 at the front and rear, and the metal rods 412 are coaxial with the transmission chain 43. The transmission gear 42 is rotated by the second crank 44, so as to drive the transmission chain 43 to move, and the caterpillar 41 moves through the transmission of the metal feeling 412. As shown in fig. 10, the second crank 44 is preferably fixed to the transmission gear 42 for transmission through a square bushing 46. Specifically, one end of the second crank 44 is provided with a structure that cooperates with the square bushing 46 to enable hand cranking operation.
According to the above embodiments, it can be seen that the transfer cart according to the present invention can perform a horizontal pushing operation in a narrow space to transport a test specimen and a jig.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A transfer trolley is characterized by comprising a trolley frame main body and wheels; wherein the content of the first and second substances,
the frame main body consists of a first vertical beam, a second vertical beam and an adjustable bracket connected with the first vertical beam and the second vertical beam;
the wheels are arranged at the bottom of the first vertical beam and the second vertical beam.
2. The transfer car (buggy) of claim 1, wherein said wheels comprise universal wheels.
3. A trolley according to claim 1 or 2, characterized in that a back plate is arranged between the first vertical beam and the second vertical beam.
4. A transfer trolley according to any one of claims 1-3, characterised in that the frame body is provided with a top cover on top.
5. A trolley according to any one of claims 1-4, characterised in that the carriage is provided with lifting means.
6. The transfer car (buggy) of claim 5, wherein said lifting means comprises a first bevel gear, a second bevel gear, a drive wheel, a driven wheel, a lead screw and a first crank; wherein the content of the first and second substances,
the first bevel gear, the driving wheel and the driven wheel are fixed on the frame main body, the first bevel gear and the driving wheel rotate along the horizontal direction, and the first bevel gear is meshed with the driving wheel;
the driving wheel drives the driven wheel to rotate through a belt, the screw rod penetrates through the driven wheel, the screw rod is connected with the bracket, and the driven wheel drives the bracket to move up and down along the screw rod;
the second bevel gear is meshed with the first bevel gear, and the second bevel gear rotates in a vertical direction; the first crank can drive the second bevel gear to rotate.
7. The transfer car (buggy) of claim 6, wherein said lifting device further comprises an anti-disengagement cap arranged at the bottom of said carriage to prevent rotation of said screw.
8. A trolley according to any one of claims 1-7, characterised in that the bottom of the carriage is provided with pushing means.
9. The transfer car (buggy) of claim 8, wherein said pushing means comprises a track, a drive gear, a drive chain and a second crank; wherein the content of the first and second substances,
the crawler belt is arranged on the bracket, the transmission chains are arranged on two sides of the crawler belt, and the transmission gears are embedded with the transmission chains;
the second crank can drive the transmission gear to rotate.
10. A trolley according to claim 9, characterized in that the lower part of the track is provided with rollers for supporting weights.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811486765.5A CN111284535A (en) | 2018-12-06 | 2018-12-06 | Transfer trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811486765.5A CN111284535A (en) | 2018-12-06 | 2018-12-06 | Transfer trolley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111284535A true CN111284535A (en) | 2020-06-16 |
Family
ID=71029755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811486765.5A Pending CN111284535A (en) | 2018-12-06 | 2018-12-06 | Transfer trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111284535A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005075248A (en) * | 2003-09-02 | 2005-03-24 | Isuzu Seisakusho:Kk | Hand truck |
| KR100577823B1 (en) * | 2004-12-15 | 2006-05-11 | 현대모비스 주식회사 | Apparatus for keeping a safety dummy |
| KR100831207B1 (en) * | 2007-02-22 | 2008-05-22 | 재단법인 산재의료관리원 | Electric table for a user of wheel chair |
| CN202930800U (en) * | 2012-11-28 | 2013-05-08 | 杭州万禾电力科技有限公司 | GCK drawer unit transferring trolley |
| CN104494674A (en) * | 2014-12-24 | 2015-04-08 | 山东省农业科学院 | Special apparatus transfer trolley for laboratory |
| CN106625540A (en) * | 2016-10-08 | 2017-05-10 | 中国航空动力机械研究所 | Transferring assembling trolley |
| CN206474201U (en) * | 2017-02-15 | 2017-09-08 | 沈岑 | A kind of equipment transfer car(buggy) of use for laboratory |
| CN206828026U (en) * | 2017-06-27 | 2018-01-02 | 国网山东省电力公司烟台市福山区供电公司 | A kind of handling facilities being used in warehouse |
| CN206826712U (en) * | 2017-06-02 | 2018-01-02 | 湖北工程学院 | A kind of packing case transports apparatus for placing |
| CN207579906U (en) * | 2017-12-14 | 2018-07-06 | 皖南医学院弋矶山医院 | A kind of adjustable sterilizing article transfer car(buggy) |
-
2018
- 2018-12-06 CN CN201811486765.5A patent/CN111284535A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005075248A (en) * | 2003-09-02 | 2005-03-24 | Isuzu Seisakusho:Kk | Hand truck |
| KR100577823B1 (en) * | 2004-12-15 | 2006-05-11 | 현대모비스 주식회사 | Apparatus for keeping a safety dummy |
| KR100831207B1 (en) * | 2007-02-22 | 2008-05-22 | 재단법인 산재의료관리원 | Electric table for a user of wheel chair |
| CN202930800U (en) * | 2012-11-28 | 2013-05-08 | 杭州万禾电力科技有限公司 | GCK drawer unit transferring trolley |
| CN104494674A (en) * | 2014-12-24 | 2015-04-08 | 山东省农业科学院 | Special apparatus transfer trolley for laboratory |
| CN106625540A (en) * | 2016-10-08 | 2017-05-10 | 中国航空动力机械研究所 | Transferring assembling trolley |
| CN206474201U (en) * | 2017-02-15 | 2017-09-08 | 沈岑 | A kind of equipment transfer car(buggy) of use for laboratory |
| CN206826712U (en) * | 2017-06-02 | 2018-01-02 | 湖北工程学院 | A kind of packing case transports apparatus for placing |
| CN206828026U (en) * | 2017-06-27 | 2018-01-02 | 国网山东省电力公司烟台市福山区供电公司 | A kind of handling facilities being used in warehouse |
| CN207579906U (en) * | 2017-12-14 | 2018-07-06 | 皖南医学院弋矶山医院 | A kind of adjustable sterilizing article transfer car(buggy) |
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Application publication date: 20200616 |