CN108128331A - A kind of electrically driven truck - Google Patents
A kind of electrically driven truck Download PDFInfo
- Publication number
- CN108128331A CN108128331A CN201810114941.6A CN201810114941A CN108128331A CN 108128331 A CN108128331 A CN 108128331A CN 201810114941 A CN201810114941 A CN 201810114941A CN 108128331 A CN108128331 A CN 108128331A
- Authority
- CN
- China
- Prior art keywords
- vehicle frame
- type vehicle
- wagon box
- installing plate
- curved arc
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 239000002360 explosive Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B1/00—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor
- B62B1/10—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels
- B62B1/12—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor in which the load is intended to be transferred totally to the wheels involving parts being adjustable, collapsible, attachable, detachable, or convertible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0033—Electric motors
- B62B5/0036—Arrangements of motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0033—Electric motors
- B62B5/0053—Arrangements of batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0026—Propulsion aids
- B62B5/0069—Control
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
Abstract
A kind of electrically driven truck of the present invention, it is characterised in that：Including U-shaped curved arc vehicle frame, the support of L-type vehicle frame, the pushing hands of L-type vehicle frame, wagon box, transmission shaft component, motor, wheel, battery, control wire box and hand controller；The U-shaped curved arc vehicle frame both sides tail end is fixedly connected there are two L-type vehicle frame support, and two L-type vehicle frames support tail ends are respectively fixedly connected with there are two the L-type vehicle frame pushing hands, and above-mentioned three forms complete vehicle frame；Wagon box installing plate before being provided with above the U-shaped curved arc vehicle frame, the L-type vehicle frame support top is provided with rear wagon box installing plate, waist-shaped hole is offered on the preceding wagon box installing plate and the rear wagon box installing plate, the wagon box is mounted at by bolt on the preceding wagon box installing plate and the rear wagon box installing plate；Easy for installation with simple in structure, easy cleaning is safeguarded, securely and reliably, it is easy to operate the advantages of.
Description
Technical field
The present invention relates to means of transport fields, and in particular to electrically driven truck.
Background technology
Hutching is a kind of common engineering machinery, be widely used in it is industrial using every aspect, especially
In building trade, the materials such as transport cement, mortar.Traditional hutching has following deficiency：1st, by manpower pull or
It pushes, labor intensity is big, increases the work fatigue degree of staff, lengthens working hours, affect work to a certain extent
Make efficiency and project progress；2nd, structure is mostly integrally molded, and cleaning is inconvenient.Someone devises electrically driven truck thus, but
The problems such as electrically driven truck generally existing in the market is complicated, installation maintenance is inconvenient, intensity is unreliable, inconvenient for operation.
Therefore, how existing cart especially electrically driven truck is improved, it is this field that it is made, which to overcome the above problem,
Technical staff's problem urgently to be resolved hurrily.
Invention content
It is an object of the present invention to provide a kind of simple in structure, easy for installation, easy cleaning is safeguarded, securely and reliably,
Easy to operate electrically driven truck.
To achieve the above objectives, the technical solution adopted by the present invention is：A kind of electrically driven truck, it is characterised in that：Including U-shaped
Curved arc vehicle frame, the support of L-type vehicle frame, the pushing hands of L-type vehicle frame, wagon box, transmission shaft component, motor, wheel, battery, control wire box and hand
Control device；The U-shaped curved arc vehicle frame both sides tail end is fixedly connected there are two L-type vehicle frame support, and two L-type vehicle frames support
Tail end is respectively fixedly connected with there are two the L-type vehicle frame pushing hands, and above-mentioned three forms complete vehicle frame；On the U-shaped curved arc vehicle frame
Wagon box installing plate before side is provided with, the L-type vehicle frame support top are provided with rear wagon box installing plate, the preceding wagon box installing plate and
Waist-shaped hole is offered after described on wagon box installing plate, the wagon box is mounted at the preceding wagon box by bolt and installs
On plate and the rear wagon box installing plate；Transmission axle installing plate, the transmission axle installing plate are provided with below the U-shaped curved arc vehicle frame
On offer waist-shaped hole, the transmission shaft component and the wheel are two, the transmission shaft component include axle sleeve, connection method
Blue, gusseted and motor shaft, the connecting flange are fixedly installed on the axle sleeve inner face, the gusseted fixed setting
In offering waist-shaped hole in the above axle sleeve, the gusseted, the gusseted be bolted be installed on it is described
It being driven in axle installing plate, the motor is fixedly installed on the connecting flange of both sides, and the motor shaft passes through the axle sleeve,
And one end connects the motor, the other end connects the wheel；The battery and the control wire box are fixedly installed in the L-type
In vehicle frame support, the hand controller is fixedly installed in the L-type vehicle frame pushing hands, and the battery provides the motor power, institute
State hand controller controls the motor to turn to stop by the control wire box.
As an improvement, be fixedly connected between the U-shaped curved arc vehicle frame and L-type vehicle frame support by connecting tube, it is described
At least two connecting holes are offered in connecting tube, the U-shaped curved arc vehicle frame tail end offers multiple connecting holes, the L-type
Vehicle frame support front end offers one or more connecting holes, and any two connecting hole in the connecting tube is connected respectively by bolt
Connect a connecting hole on the connecting hole and L-type vehicle frame support on the U-shaped curved arc vehicle frame.The fixed form is simple
Reliably, and the setting of multiple connecting holes can adjust the entire length of vehicle frame.
Preferably, the L-type vehicle frame support tail end offers positive step groove, the L-type vehicle frame pushing hands front end opens up
There is reverse step slot, the forward direction step groove is mutually fitted into, and be bolted to connection with the reverse step slot.The fixation side
Formula order is reliable, easy to process, and part is few.
As an improvement, the U-shaped curved arc vehicle frame front end is folded upward at, for protecting the wagon box.It is equivalent to picking-up vehicle
Protective fence plays the role of an anticollision.
It is further improved, is additionally provided with support plate above the U-shaped curved arc vehicle frame, is used to support the wagon box.Make wagon box
Installation is more steady, improves the reliability of cart.
Preferably, the L-type vehicle frame support lower section is additionally provided with V-type supporting rack.Support when being parked for cart.
As an improvement, the L-type vehicle frame pushing hands tail end is removably installed with positioning pipe, it is arranged on the positioning pipe
There is rubber sleeve.The detachable setting of positioning pipe, it is easy to clean to safeguard rubber sleeve.
As an improvement, being provided with motor shield below the motor, the motor shield is fixedly installed in described U-shaped
On curved arc vehicle frame and L-type vehicle frame support.For protecting motor, the reliability of equipment is improved.
Compared with prior art, the advantage of the invention is that：The vehicle frame of this programme is spliced, and adopt by three parts
It is connected with, it is simple and reliable for structure and easy for installation；The detachable setting of wagon box also allows for convenient for cleaning wagon box at any time
The maintenance of motor；Motor is fixed on transmission shaft component, and structure is more reliable and more stable；By motor, battery, control wire box and
The electric connection of hand controller, control mode is simple, easy to operate.
Description of the drawings
Fig. 1 and Fig. 2 is a kind of dimensional structure diagram of preferred embodiment according to the present invention；
Fig. 3 is a kind of side view of preferred embodiment according to the present invention；
Fig. 4 is that a kind of preferred embodiment according to the present invention removes the dimensional structure diagram after wagon box；
Fig. 5 is a kind of explosive view of preferred embodiment according to the present invention；
Fig. 6 is the explosive view of L-type vehicle frame pushing hands in a kind of preferred embodiment according to the present invention；
Fig. 7 is the explosive view of transmission shaft component in a kind of preferred embodiment according to the present invention.
Specific embodiment
It is described below to disclose the present invention so that those skilled in the art can realize the present invention.It is excellent in being described below
Embodiment is selected to be only used as illustrating, it may occur to persons skilled in the art that other obvious modifications.
It is that a preferred embodiment of the present invention includes U-shaped curved arc vehicle frame 1, L-type vehicle frame support 2, L as shown in Fig. 1~7
Type vehicle frame pushing hands 3, wagon box 4, transmission shaft component 5, motor 6, wheel 7, battery 8, control wire box 9 and hand controller 10.It specifically connects
It is as follows to connect mode：
U-shaped 1 both sides tail end of curved arc vehicle frame is fixedly connected there are two L-type vehicle frame support 2, and two L-type vehicle frames support 2 tail ends point
It is not fixedly connected there are two L-type vehicle frame pushing hands 3, above-mentioned three forms complete vehicle frame；U-shaped 1 top of curved arc vehicle frame is provided with front truck
Struggle against installing plate 11, and 2 top of L-type vehicle frame support is provided with rear wagon box installing plate 21, preceding wagon box installing plate 11 and rear wagon box installing plate
Waist-shaped hole is offered on 21, wagon box 4 is mounted at preceding wagon box installing plate 11 and rear wagon box installing plate 12 by bolt
On；U-shaped 1 lower section of curved arc vehicle frame is provided with transmission axle installing plate 12, is driven in axle installing plate 12 and offers waist-shaped hole, transmission shaft group
Part 5 and wheel 7 are two, and transmission shaft component 5 includes axle sleeve 51, connecting flange 52, gusseted 53 and motor shaft 54, connection
Flange 52 is fixedly installed on 51 inner face of axle sleeve, and gusseted 53 is fixedly installed on 51 top of axle sleeve, is opened up in gusseted 53
There is waist-shaped hole, gusseted 53, which is bolted, to be installed in transmission axle installing plate 12, and motor 6 is fixedly installed in the company of both sides
On acting flange 52, motor shaft 54 passes through axle sleeve 51, and one end connection motor 6, other end connection wheel 7；Battery 8 and control wire box
9 are fixedly installed in L-type vehicle frame support 2, and hand controller 10 is fixedly installed in L-type vehicle frame pushing hands 3, and it is dynamic that battery 8 provides motor 6
Power, hand controller 10 is by controlling wire box 9 that 6 turns of motor is controlled to stop.
Further specifically, being fixedly connected between U-shaped curved arc vehicle frame 1 and L-type vehicle frame support 2 by connecting tube 1-2, connect
At least two connecting holes are offered on pipe 1-2, U-shaped 1 tail end of curved arc vehicle frame offers multiple connecting holes, and L-type vehicle frame supports 2 front ends
Offer one or more connecting holes, any two connecting hole on connecting tube 1-2 connects U-shaped curved arc vehicle frame by bolt respectively
A connecting hole on a connecting hole and L-type vehicle frame support 2 on 1.L-type vehicle frame supports 2 tail ends to offer positive step groove
22,3 front end of L-type vehicle frame pushing hands offers reverse step slot 31, and positive step groove 22 is mutually fitted into, and pass through with reverse step slot 31
Bolt is fixedly connected.
It designs as an optimization, U-shaped 1 front end of curved arc vehicle frame is folded upward at, for protecting wagon box 4.U-shaped 1 top of curved arc vehicle frame
Support plate 13 is additionally provided with, is used to support wagon box 4.2 lower section of L-type vehicle frame support is additionally provided with V-type supporting rack 23.L-type vehicle frame pushes away
3 tail end of hand is removably installed with positioning pipe 32, and rubber sleeve 33 is arranged on positioning pipe 32.6 lower section of motor is provided with
Motor shield 61, motor shield 61 are fixedly installed on U-shaped curved arc vehicle frame 1 and L-type vehicle frame support 2.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection domain by appended claims and its
Equivalent defines.
Claims (8)
1. a kind of electrically driven truck, it is characterised in that：Including U-shaped curved arc vehicle frame, the support of L-type vehicle frame, the pushing hands of L-type vehicle frame, wagon box, biography
Moving axis component, motor, wheel, battery, control wire box and hand controller；The U-shaped curved arc vehicle frame both sides tail end is fixedly connected with two
A L-type vehicle frame support, two L-type vehicle frame support tail ends are respectively fixedly connected with there are two the L-type vehicle frame pushing hands, on
It states three and forms complete vehicle frame；Wagon box installing plate before being provided with above the U-shaped curved arc vehicle frame, the L-type vehicle frame support top
Rear wagon box installing plate is provided with, waist-shaped hole, the vehicle are offered on the preceding wagon box installing plate and the rear wagon box installing plate
Bucket is mounted at by bolt on the preceding wagon box installing plate and the rear wagon box installing plate；The U-shaped curved arc vehicle frame
Lower section is provided with transmission axle installing plate, and waist-shaped hole, the transmission shaft component and the vehicle are offered in the transmission axle installing plate
Wheel is two, and the transmission shaft component includes axle sleeve, connecting flange, gusseted and motor shaft, and the connecting flange is fixed
The axle sleeve inner face is set to, the gusseted is fixedly installed on the above axle sleeve, is offered in the gusseted
Waist-shaped hole, the gusseted, which is bolted, to be installed in the transmission axle installing plate, and the motor is fixedly installed in two
On the connecting flange of side, the motor shaft passes through the axle sleeve, and one end connects the motor, and the other end connects the vehicle
Wheel；The battery and the control wire box are fixedly installed in the L-type vehicle frame support, and the hand controller is fixedly installed in described
In L-type vehicle frame pushing hands, the battery provides the motor power, and the hand controller controls the motor by the control wire box
Turn to stop.
2. a kind of electrically driven truck according to claim 1, it is characterised in that：The U-shaped curved arc vehicle frame and the L-type vehicle frame
It is fixedly connected between support by connecting tube, at least two connecting holes, the U-shaped curved arc vehicle frame tail is offered in the connecting tube
End offers multiple connecting holes, and the L-type vehicle frame support front end offers one or more connecting holes, in the connecting tube
Any two connecting hole connect a connecting hole and the L-type vehicle frame branch on the U-shaped curved arc vehicle frame respectively by bolt
A connecting hole in support.
3. a kind of electrically driven truck according to claim 2, it is characterised in that：The L-type vehicle frame support tail end offers just
To step groove, the L-type vehicle frame pushing hands front end offers reverse step slot, the forward direction step groove and the reverse step slot phase
It is chimeric, and be bolted to connection.
4. a kind of electrically driven truck according to claim 3, it is characterised in that：The U-shaped curved arc vehicle frame front end is folded upward at,
For protecting the wagon box.
5. a kind of electrically driven truck according to claim 4, it is characterised in that：It is additionally provided with above the U-shaped curved arc vehicle frame
Support plate is used to support the wagon box.
6. a kind of electrically driven truck according to claim 5, it is characterised in that：The L-type vehicle frame support lower section is additionally provided with V
Type supporting rack.
7. a kind of electrically driven truck according to claim 6, it is characterised in that：The L-type vehicle frame pushing hands tail end is dismountable
Positioning pipe is installed with, rubber sleeve is arranged on the positioning pipe.
8. a kind of electrically driven truck according to claim 7, it is characterised in that：Motor protection is provided with below the motor
Cover, the motor shield are fixedly installed on the U-shaped curved arc vehicle frame and L-type vehicle frame support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810114941.6A CN108128331A (en) | 2018-02-06 | 2018-02-06 | A kind of electrically driven truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810114941.6A CN108128331A (en) | 2018-02-06 | 2018-02-06 | A kind of electrically driven truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108128331A true CN108128331A (en) | 2018-06-08 |
Family
ID=62430590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810114941.6A Pending CN108128331A (en) | 2018-02-06 | 2018-02-06 | A kind of electrically driven truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108128331A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108945015A (en) * | 2018-07-18 | 2018-12-07 | 烟台烟知企业管理咨询有限公司 | A kind of foldable mortar small handcart with power-assisted |
| WO2020113695A1 (en) * | 2018-12-07 | 2020-06-11 | 江苏英河工贸股份有限公司 | Electric cart |
| WO2021143138A1 (en) * | 2020-01-15 | 2021-07-22 | 苏州科瓴精密机械科技有限公司 | Wheel drive structure and lawn mower |
| CN113859332A (en) * | 2021-11-10 | 2021-12-31 | 重庆新科建设集团有限公司 | Carrying equipment for flexibly steering construction materials on construction site |
| US20220258782A1 (en) * | 2021-02-18 | 2022-08-18 | High Life Systems LLC | Modular cart |
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| CN2345417Y (en) * | 1998-08-25 | 1999-10-27 | 潘克 | Portable hand cart |
| CN2754956Y (en) * | 2004-10-20 | 2006-02-01 | 宜炫企业有限公司 | Improved pushcart structure |
| TWM310157U (en) * | 2006-11-29 | 2007-04-21 | Buildup Internat Trading Co Lt | Wagon |
| CN201334037Y (en) * | 2008-12-30 | 2009-10-28 | 廖世金 | Tip lorry |
| CN201494475U (en) * | 2009-07-29 | 2010-06-02 | 青岛泰发集团股份有限公司 | Novel labor-saving trolley |
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| CN201980260U (en) * | 2011-03-11 | 2011-09-21 | 吴维晋 | Novel trolley |
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| CN203485937U (en) * | 2013-03-13 | 2014-03-19 | 赵东 | Electric dual-wheel bridge-type freight-carrying handcart |
| CN104670269A (en) * | 2013-11-29 | 2015-06-03 | 董建芳 | Wheelbarrow |
| CN205589258U (en) * | 2016-05-05 | 2016-09-21 | 青岛宜春金属制造有限公司 | Novel handcart |
| CN205589260U (en) * | 2016-05-05 | 2016-09-21 | 青岛宜春金属制造有限公司 | Shallow of single round cement |
| CN106004945A (en) * | 2016-06-30 | 2016-10-12 | 胡挺 | Electric moving van |
| CN206049730U (en) * | 2016-05-11 | 2017-03-29 | 佛山市华复康医疗器械科技有限公司 | The fore wheel structure of handbarrow |
| CN206644855U (en) * | 2017-03-31 | 2017-11-17 | 深圳广田机器人有限公司 | Construction site assist transportation car |
| CN207826272U (en) * | 2018-02-06 | 2018-09-07 | 宁波德克尔运输设备有限公司 | A kind of electrically driven truck |
-
2018
- 2018-02-06 CN CN201810114941.6A patent/CN108128331A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2345417Y (en) * | 1998-08-25 | 1999-10-27 | 潘克 | Portable hand cart |
| CN2754956Y (en) * | 2004-10-20 | 2006-02-01 | 宜炫企业有限公司 | Improved pushcart structure |
| TWM310157U (en) * | 2006-11-29 | 2007-04-21 | Buildup Internat Trading Co Lt | Wagon |
| CN201334037Y (en) * | 2008-12-30 | 2009-10-28 | 廖世金 | Tip lorry |
| CN201494475U (en) * | 2009-07-29 | 2010-06-02 | 青岛泰发集团股份有限公司 | Novel labor-saving trolley |
| CN201816631U (en) * | 2010-08-26 | 2011-05-04 | 中山乐美达日用制品有限公司 | Handle stretching-retracting device for baby carriage |
| CN201980260U (en) * | 2011-03-11 | 2011-09-21 | 吴维晋 | Novel trolley |
| CN202098438U (en) * | 2011-05-05 | 2012-01-04 | 青岛泰发集团股份有限公司 | Hopper clamping type trolley |
| CN202243775U (en) * | 2011-10-25 | 2012-05-30 | 周爱兴 | Traction trailer |
| KR101232023B1 (en) * | 2011-11-14 | 2013-02-08 | 문정수 | The cost diminishable improved model handcart system |
| CN203485937U (en) * | 2013-03-13 | 2014-03-19 | 赵东 | Electric dual-wheel bridge-type freight-carrying handcart |
| CN104670269A (en) * | 2013-11-29 | 2015-06-03 | 董建芳 | Wheelbarrow |
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| CN205589260U (en) * | 2016-05-05 | 2016-09-21 | 青岛宜春金属制造有限公司 | Shallow of single round cement |
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| CN106004945A (en) * | 2016-06-30 | 2016-10-12 | 胡挺 | Electric moving van |
| CN206644855U (en) * | 2017-03-31 | 2017-11-17 | 深圳广田机器人有限公司 | Construction site assist transportation car |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108945015A (en) * | 2018-07-18 | 2018-12-07 | 烟台烟知企业管理咨询有限公司 | A kind of foldable mortar small handcart with power-assisted |
| WO2020113695A1 (en) * | 2018-12-07 | 2020-06-11 | 江苏英河工贸股份有限公司 | Electric cart |
| WO2021143138A1 (en) * | 2020-01-15 | 2021-07-22 | 苏州科瓴精密机械科技有限公司 | Wheel drive structure and lawn mower |
| US20220258782A1 (en) * | 2021-02-18 | 2022-08-18 | High Life Systems LLC | Modular cart |
| US11745776B2 (en) * | 2021-02-18 | 2023-09-05 | High Life Systems LLC | Modular cart |
| CN113859332A (en) * | 2021-11-10 | 2021-12-31 | 重庆新科建设集团有限公司 | Carrying equipment for flexibly steering construction materials on construction site |
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