CN218578819U

CN218578819U - Transport trolley

Info

Publication number: CN218578819U
Application number: CN202222646149.XU
Authority: CN
Inventors: 陈拥军; 王鹏飞; 黄彬; 袁增雷; 宦朋松; 姜亚雷; 金玉斌; 孙哲
Original assignee: Jiangsu Zhongtian Huayu Intelligent Technology Co ltd
Current assignee: Jiangsu Zhongtian Huayu Intelligent Technology Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-03-07
Anticipated expiration: 2032-10-09

Abstract

The embodiment of the application provides a transport trolley, which is used for being matched with a ground rail to conduct rail guided transportation and comprises a trolley body, a driving mechanism, a lifting mechanism and a carrying platform. The driving mechanism is connected with the vehicle body and comprises a driving assembly, the driving assembly comprises a driving unit, a transmission shaft set, a walking wheel and a guide wheel, the driving unit is in transmission connection with the transmission shaft set, the walking wheel and the guide wheel are in transmission connection with the transmission shaft set, the guide wheel is used for being matched with a ground rail to guide, and the driving unit drives the walking wheel and the guide wheel to move through the transmission shaft set so as to realize the walking of the vehicle body. The lifting mechanism is connected to the vehicle body and comprises a scissor structure and a hydraulic driving unit, the scissor structure is connected with the vehicle body, and the hydraulic driving unit is in driving connection with the scissor structure and used for pushing the scissor structure to lift or fall back. The carrying platform is movably connected with the vehicle body through a scissor fork structure. The utility model provides a travelling bogie can realize the battery package at goods shelves and trade the fast transportation between the power station.

Description

Transport trolley

Technical Field

The application relates to the field of automobile production, in particular to a transport trolley applied to a new energy automobile battery pack replacement.

Background

New energy automobiles are the development trend in the field of automobiles at present, and the new energy automobiles are generally provided with battery packs as energy supply sources. Current battery package supply scheme is mostly artifical transport battery package, and current supply scheme needs the processing of a large amount of personnel participation material supply, and current supply scheme is consuming time and is hard and loaded down with trivial details work. How to solve the above problems and improve the transportation efficiency of the battery pack is considered by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the application provides a transportation trolley, and the transportation trolley can realize that the battery pack is transported between the battery replacement station and the goods shelf accurately and quickly.

The embodiment of the application provides a travelling bogie, which is used for being matched with a ground rail to carry out rail guided transportation and comprises a bogie body, a driving mechanism, a lifting mechanism and a carrying platform. Actuating mechanism with vehicle body coupling, actuating mechanism includes the initiative subassembly, the initiative subassembly includes drive unit, transmission shaft group, walking wheel and leading wheel, drive unit with transmission shaft group transmission is connected, the walking wheel reaches the leading wheel with transmission shaft group transmission is connected, the leading wheel be used for with the ground rail cooperation is in order to lead, drive unit passes through transmission shaft group drives the walking wheel reaches the leading wheel motion is in order to realize the walking of automobile body. The lifting mechanism is connected with the vehicle body and comprises a scissor structure and a hydraulic driving unit, the scissor structure is connected with the vehicle body, and the hydraulic driving unit is in driving connection with the scissor structure and used for pushing the scissor structure to lift or fall back. The carrying platform is movably connected with the vehicle body through the scissor fork structure.

In a possible implementation manner, the transportation trolley further comprises a photoelectric address unit, the photoelectric address unit is connected to the trolley body, and the photoelectric address unit is used for being matched with a photoelectric identification unit arranged on the ground rail so as to position the transportation trolley.

In a possible implementation mode, the transportation trolley further comprises a tow chain support, the tow chain support comprises an extension section and a bending section, the extension section is connected with the trolley body and extends towards the direction far away from the trolley body, the bending section is connected with the extension section and extends towards one side of the trolley body, where the walking wheels are arranged, and the photoelectric addressing unit is arranged at the end part, far away from the bending section, of the extension section.

In a possible implementation manner, the vehicle body includes a frame and a bottom plate, the bottom plate is fixed to the frame, the lifting mechanism is connected to the bottom plate, the driving mechanism further includes a driven component, both the driving component and the driven component are connected to the frame, and the bottom plate is disposed between the driving component and the driven component.

In a possible implementation manner, the driven assembly comprises a walking driven wheel and a guiding driven wheel, the walking driven wheel and the guiding driven wheel are arranged on two sides of the frame opposite to each other at intervals, the walking driven wheel and the walking wheel are arranged on the same side of the frame, and the guiding driven wheel and the guiding wheel are arranged on the same side of the frame, so that the walking driven wheel and the walking wheel or the guiding driven wheel and the guiding wheel respectively correspond to the same ground rail.

In a possible embodiment, the guide wheel includes a solid portion and a rim portion, the solid portion is cylindrical, the rim portion is connected with the solid portion and extends outwards, the rim portion and the solid portion cooperate to define an annular guide groove, the guide groove is located on the outer side of the solid portion, and the guide groove is used for accommodating the ground rail.

In a possible implementation manner, the driving unit includes a driving motor and a driving gear, the driving motor is in transmission connection with the driving gear, the transmission shaft set includes a driven gear and a transmission main shaft, the driven gear is sleeved outside the transmission main shaft and is in transmission connection with the transmission main shaft, and the driving gear is in meshing transmission with the driven gear.

In a possible implementation manner, the transmission shaft set further includes two transmission shaft shafts and two concentric shaft sleeves, the two transmission shaft shafts are respectively connected to two ends of the transmission main shaft, the driven gear is located between the two transmission shaft shafts, each transmission shaft is connected to one end of the transmission main shaft through one concentric shaft sleeve, one end of one transmission shaft, which is far away from the transmission main shaft, is connected to the guide wheel, and one end of the other transmission shaft, which is far away from the transmission main shaft, is connected to the traveling wheel.

In a possible implementation manner, the driving mechanism further includes a plurality of deep groove ball bearings, two of the deep groove ball bearings are sleeved on the transmission main shaft and located on two sides of the driven gear, which are opposite to each other, two groups of deep groove ball bearings are respectively sleeved on the transmission wheel shaft, and each group of the two groups of deep groove ball bearings includes two deep groove ball bearings.

In a possible implementation manner, the carrier and the vehicle body are respectively located on two opposite sides of the scissors structure, the carrier is arranged in parallel with a bottom plate of the vehicle body, and the lifting mechanism is configured to drive the carrier to move closer to or away from the bottom plate in parallel.

Compared with the prior art, the transport trolley realizes the rapid transport of the battery pack through the mutual cooperation of the transport trolley and a ground rail arranged in the new energy battery replacing and storing system, and the transport of the battery pack comprises the transport of the empty battery pack detached from the new energy vehicle to the goods shelf, so that the goods shelf can store and charge the empty battery pack; the transportation of the battery pack further comprises the step of transporting the battery pack charged in the goods shelf to the new energy vehicle battery replacement station, so that the new energy vehicle battery replacement station can install the fully charged battery pack in the new energy vehicle. The utility model provides a travelling bogie passes through actuating mechanism and ground rail cooperation in order to realize the battery package at goods shelves and trade the rapid transit between the worker station, and the travelling bogie of this application still drives the microscope carrier through lifting mechanism and rises or fall back, makes travelling bogie and goods shelves and trade the cooperation of worker station in order to bear the battery package that needs transported.

Drawings

Fig. 1 is a schematic perspective view illustrating a transportation cart and a ground rail according to an embodiment of the present application.

Fig. 2 is a perspective view of a transportation cart according to an embodiment of the present application.

Fig. 3 is a partial perspective view of a transportation cart according to an embodiment of the present application.

Fig. 4 is a partial plan view of a transport cart according to an embodiment of the present application from a top view.

Fig. 5 is a perspective view of an active assembly of a transport cart according to an embodiment of the present disclosure.

Fig. 6 is a partial perspective view of the active assembly of the transport cart according to an embodiment of the present application.

Fig. 7 is a partial perspective view of a transport cart according to an embodiment of the present disclosure.

Description of the main elements

Travelling bogie 1

Vehicle body 11

Frame 111

Base plate 112

Bearing part 113

Surrounding part 114

Drive mechanism 12

Active component 120

Drive unit 121

Drive motor 122

Driving gear 123

Transmission shaft set 124

Driven gear 125

Transmission main shaft 126

Drive axle 127

Concentric sleeve 128

Deep groove ball bearing 129

Road wheel 131

Guide wheel 132

Solid part 133

Edge portion 134

Guide groove 135

Driven assembly 140

Traveling driven wheel 141

Guide driven wheel 142

Drag chain support 151

Extension 152

Bending section 153

Photoelectric addressing unit 154

Lifting mechanism 16

Scissor fork structure 161

Hydraulic unit 162

Fixed end 163

Piston end 164

Movable arm 165

Stage 18

Fixing component 181

Electric control box 19

Ground rail 2

Track 21

Photoelectric identification unit 22

Auxiliary track 23

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The following description refers to the accompanying drawings to more fully describe the present disclosure. There is shown in the drawings exemplary embodiments of the present application. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals designate the same or similar mechanisms.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, as used herein, "comprises" and/or "comprising" and/or "having," integers, steps, operations, elements, and/or mechanisms, but does not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, unless otherwise defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application and will not be interpreted in an idealized or overly formal sense.

The following description of exemplary embodiments refers to the accompanying drawings. It should be noted that the mechanisms described with reference to the figures are not necessarily shown to scale; and the same or similar mechanisms will be given the same or similar reference numerals or similar terms.

Embodiments of the present application will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 7, the present embodiment provides a transport trolley 1 for rail guided transport in cooperation with a ground rail 2. The transport cart 1 includes a cart body 11, a drive mechanism 12, a lift mechanism 16, and a stage 18. The driving mechanism 12 is connected with the vehicle body 11, the driving mechanism 12 includes a driving component 120, the driving component 120 includes a driving unit 121, a transmission shaft set 124, a traveling wheel 131 and a guide wheel 132, the driving unit 121 is connected with the transmission shaft set 124 in a transmission manner, the traveling wheel 131 and the guide wheel 132 are connected with the transmission shaft set 124 in a transmission manner, the guide wheel 132 is used for being matched with the ground rail 2 for guiding, and the driving unit 121 drives the traveling wheel 131 and the guide wheel 132 to move through the transmission shaft set 124 so as to realize the traveling of the vehicle body 11. The lifting mechanism 16 is connected to the vehicle body 11, the lifting mechanism 16 includes a scissors structure 161 and a hydraulic unit 162, the scissors structure 161 is connected to the vehicle body 11, and the hydraulic unit 162 is connected to the scissors structure 161 in a driving manner for pushing the scissors structure 161 to lift or fall back. Stage 18 is movably coupled to body 11 by a scissor structure 161.

Further, travelling bogie 1 of this application is through mutually supporting with locating ground rail 2 among the new forms of energy trade electric warehouse system to the realization is to the rapid transit of battery package, and the transportation to the battery package includes transporting the empty electricity's that dismantles in the new forms of energy car (not shown) to goods shelves (not shown), so that the goods shelves are to empty electricity the battery package charges, right the transportation of battery package still include with charge well in the goods shelves the battery package transports to new forms of energy car trade power station (not shown), so that the new forms of energy car trade power station will fill with the electricity the battery package install in the new forms of energy car. Transport trolley 1 of this application is in order to realize the battery package through actuating mechanism 12 and ground rail 2 cooperation the goods shelves with trade the rapid transit between the power station, transport trolley 1 of this application still drives microscope carrier 18 through lifting mechanism 16 and rises or falls back, makes transport trolley 1 with goods shelves and trade the power station cooperation in order to bear the weight of needs transported the battery package.

In this embodiment, the ground rail 2 may be a hard rail 21 protruding from the bottom surface, and the ground rail 2 may include two parallel rails 21. Further, the ground rail 2 may further include an auxiliary rail 23, the auxiliary rail 23 may be a rail structure that is disposed parallel to the rail 21 but is not used for guiding the transportation cart 1, and the auxiliary rail 23 may include a towline slot or a cabling slot or other auxiliary or functional structures.

In one embodiment, the body 11 includes a frame 111 and a bottom plate 112, the bottom plate 112 is fixed to the frame 111, and the lifting mechanism 16 is connected to the bottom plate 112. The driving mechanism 12 further includes a driven assembly 140, the driving assembly 120 and the driven assembly 140 are both connected to the frame 111, and the bottom plate 112 is disposed between the driving assembly 120 and the driven assembly 140.

In this embodiment, the frame 111 may include a carrying portion 113 and an enclosing portion 114, the enclosing portion 114 is disposed around a peripheral edge of the carrying portion 113, the enclosing portion 114 is disposed on a side of the carrying portion 113 away from the ground, and the driving component 120 and the driven component 140 are fixedly connected to the enclosing portion 114, so that the vehicle body 11 is connected to the driving mechanism 12, and the driving mechanism 12 may drive the vehicle body 11 to travel.

In one embodiment, the driving unit 121 includes a driving motor 122 and a driving gear 123. The driving motor 122 is in transmission connection with the driving gear 123, the transmission shaft set 124 includes a driven gear 125 and a transmission main shaft 126, the driven gear 125 is sleeved outside the transmission main shaft 126 and is in transmission connection with the transmission main shaft 126, and the driving gear 123 is in meshing transmission with the driven gear 125. In the present embodiment, the driving motor 122 is a servo motor.

Further, the driving gear 123 is connected to an output end of the driving motor 122, the driving motor 122 is configured to generate a rotation torque, and the driving gear 123 is connected to the driving motor 122 to output the rotation torque to the transmission shaft set 124. The driven gear 125 engages with the driving gear 123 to transmit the torque output from the driving motor 122 to the transmission shaft group 124, so that the transmission shaft group 124 rotates.

In one embodiment, the transmission shaft set 124 further includes two transmission shaft shafts 127 and two concentric shaft sleeves 128, the two transmission shaft shafts 127 are respectively connected to two ends of the transmission main shaft 126, and the driven gear 125 is located between the two transmission shaft shafts 127. Each transmission wheel shaft 127 is connected with one end of the transmission main shaft 126 through a concentric shaft sleeve 128, one end of each transmission wheel shaft 127 far away from the transmission main shaft 126 is connected with the guide wheel 132, and the other end of each transmission wheel shaft 127 far away from the transmission main shaft 126 is connected with the travelling wheel 131.

In this embodiment, two transmission wheel shafts 127 are respectively disposed at two ends of the transmission main shaft 126, the transmission wheel shafts 127 and the transmission main shaft 126 are connected through a concentric shaft sleeve 128 to realize synchronous rotation, and the torque generated by the driving motor 122 is transmitted to the transmission main shaft 126 through the driven gear 125, then transmitted to the transmission wheel shafts 127 through the transmission main shaft 126, and transmitted to the traveling wheels 131 and the guide wheels 132 through the transmission wheel shafts 127, so that the traveling wheels 131 and the guide wheels 132 rotate and drive the transportation cart 1 to travel.

In one embodiment, the driving mechanism 12 further includes a plurality of deep groove ball bearings 129. Two deep groove ball bearings 129 are sleeved on the transmission main shaft 126 and located on two opposite sides of the driven gear 125. Each transmission wheel shaft 127 is respectively sleeved with two groups of deep groove ball bearings 129, and each group of the two groups of deep groove ball bearings 129 comprises two deep groove ball bearings 129. Further, a plurality of deep groove ball bearings 129 may be provided on the drive spindle 126 and the drive axle 127, the deep groove ball bearings 129 may be used to help carry radial loads.

In this embodiment, two deep groove ball bearings 129 may be symmetrically distributed on two opposite sides of the driven gear 125, four groups of deep groove ball bearings 129 are symmetrically distributed on two transmission wheel shafts 127 two by two, and two deep groove ball bearings 129 in each group of deep groove ball bearings 129 may be adjacently disposed.

In one embodiment, the driven assembly 140 includes a walking driven wheel 141 and a guiding driven wheel 142, and the walking driven wheel 141 and the guiding driven wheel 142 are disposed at two opposite sides of the frame 111 at an interval. The walking driven wheel 141 and the walking wheel 131 are arranged on the same side of the frame 111, and the guiding driven wheel 142 and the guiding wheel 132 are arranged on the same side of the frame 111, so that the walking driven wheel 141 and the walking wheel 131 or the guiding driven wheel 142 and the guiding wheel 132 respectively correspond to one track 21 of the same ground rail 2.

Further, the guiding driven wheel 142 and the guiding wheel 132 are disposed on the same side of the frame 111 and are disposed corresponding to one rail 21 to improve guiding stability, and similarly, the walking driven wheel 141 and the walking wheel 131 are disposed on the same side of the frame 111 and are disposed corresponding to the other rail 21.

In one embodiment, the guide wheel 132 includes a solid portion 133 and a rim portion 134, the solid portion 133 is cylindrical, the rim portion 134 is connected to the solid portion 133 and extends outward, the rim portion 134 and the solid portion 133 cooperate to define an annular guide groove 135, the guide groove 135 is located outside the solid portion 133, and the guide groove 135 is used for accommodating a rail 21 of the ground rail 2.

In this embodiment, the traveling wheels 131 and the guide wheels 132 are circular wheels, the solid portion 133 of the guide wheel 132 has a diameter equal to that of the traveling wheels 131, and the edge portion 134 extends outward from both side edges of the solid portion 133 in parallel to form a guide groove 135, so that the guide groove 135 can accommodate one rail 21, and the guide wheels 132 and the rail 21 can be guided and matched.

In an embodiment, the transportation cart 1 further includes a photoelectric address unit 154, the photoelectric address unit 154 is connected to the cart body 11, and the photoelectric address unit 154 is configured to cooperate with the photoelectric identification unit 22 disposed on the ground rail 2 to position the transportation cart 1.

In an embodiment, the transportation trolley 1 further includes a towing chain support 151, the towing chain support 151 includes an extension section 152 and a bending section 153, the extension section 152 is connected to the trolley body 11 and extends in a direction away from the trolley body 11, the bending section 153 is connected to the extension section 152 and extends toward a side of the trolley body 11 where the traveling wheels 131 are disposed, and the photoelectric addressing unit 154 is disposed at an end of the extension section 152 away from the bending section 153.

Further, the drag chain bracket 151 is directly connected to the frame 111 of the vehicle body 11, the drag chain bracket 151 may be integrally formed with the frame 111, and the drag chain bracket 151 may be used to connect to an external pulling unit to pull the transportation cart 1. The photoelectric address unit 154 is arranged at the end of the drag chain bracket 151, and the photoelectric identification unit 22 is arranged at a preset position on the ground rail 2. In one embodiment, the drag chain bracket 151 may be used to cooperate with the drag chain groove and the drag chain of the auxiliary track 23 to achieve the functions of auxiliary driving or guiding the transportation cart 1; the photoelectric identification unit 22 can be disposed on a wiring slot of the auxiliary track 23, so that the photoelectric identification unit 22 can be electrically and/or communicatively connected with other units (e.g., a central control module) through the wiring.

In one embodiment, when the transportation cart 1 is guided to travel to a predetermined position in a predetermined direction, the photoelectric addressing unit 154 passes through the photoelectric identification unit 22 in a light fork shape, so that the photoelectric addressing unit 154 and/or any one of the photoelectric identification units 22 generates an electrical signal, which can be recognized as a stop signal. The photoelectric address unit 154 and the photoelectric identification unit 22 may be a triggered photoelectric signal converter, for example, the photoelectric identification unit 22 may be a light fork including a transmitting end and an output end which are spaced apart from each other, a light path is provided in a gap between the transmitting end and the output end, and when the sheet-shaped photoelectric address unit 154 passes through the photoelectric identification unit 22, the sheet-shaped photoelectric address unit 154 blocks the light path between the transmitting end and the output end, so that the photoelectric identification unit 22 generates an electric signal. The electrical signal is transmitted to the electrical control system of the transport trolley 1 via a processor unit and an electrical communication unit, which are common in the prior art, and a corresponding working signal (e.g. a parking signal) is triggered. It is understood that the number of the photoelectric identification units 22 may be multiple, and a plurality of the photoelectric identification units 22 are spaced on the ground rail 2 to correspond to different shelves.

In the present embodiment, the positioning of the transport cart 1 can be performed by an absolute value of the driving motor 122, that is, the running distance of the transport cart 1 is determined by determining the output parameter of the servo motor. While the absolute value of the driving motor 122 is used for positioning, the photoelectric addressing unit 154 and the photoelectric identification unit 22 are matched for resetting and stopping, and the positioning precision reaches +/-2.5 mm.

In an embodiment, the carrier 18 and the vehicle body 11 are respectively located on two opposite sides of the scissors structure 161, the carrier 18 is disposed parallel to the bottom plate 112 of the vehicle body 11, and the lifting mechanism 16 is configured to drive the carrier 18 to move closer to or away from the bottom plate 112 in parallel.

In this embodiment, the hydraulic unit 162 may be a cylinder, and the fixed end 163 and the piston end 164 of the driving unit 121 are respectively connected to two movable arms 165 of the scissors structure 161, so as to drive the scissors structure 161 to rise or fall.

In one embodiment, stage 18 may be a flat plate, and flat plate-shaped stage 18 may be disposed parallel to flat plate-shaped base plate 112. The surface of the carrier 18 may be provided with a fixing member 181, and the fixing member 181 may be a surrounding fixing structure for fixing the battery pack. The surface of the carrier 18 may also be provided with a photoelectric diffuse reflection distance sensor (not shown) for sensing the distance between the carrier 18 and the battery pack to be placed to assist in transporting the battery pack.

In one embodiment, the mobile cart may further include an electric cabinet 19, and the electric cabinet 19 may be connected to the cart body 11. Further, the electric cabinet 19 may be disposed on a side of the active component 120 away from the bottom surface, and the electric cabinet 19 may be electrically connected to at least the driving motor 122 and the hydraulic unit 162 through a conventional wire or a flexible circuit board.

Hereinbefore, specific embodiments of the present application are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are intended to be within the scope of the present application.

Claims

1. A transport trolley for use in association with a ground rail for rail guided transport, comprising:

a vehicle body;

the driving mechanism is connected with the vehicle body and comprises a driving assembly, the driving assembly comprises a driving unit, a transmission shaft set, a traveling wheel and a guide wheel, the driving unit is in transmission connection with the transmission shaft set, the traveling wheel and the guide wheel are in transmission connection with the transmission shaft set, the guide wheel is used for being matched with the ground rail to guide, and the driving unit drives the traveling wheel and the guide wheel to move through the transmission shaft set so as to realize the traveling of the vehicle body;

the lifting mechanism is connected to the vehicle body and comprises a scissor structure and a hydraulic driving unit, the scissor structure is connected with the vehicle body, and the hydraulic driving unit is in driving connection with the scissor structure and used for pushing the scissor structure to lift or fall back;

and the carrying platform is movably connected with the vehicle body through the scissor structure.

2. The transportation trolley according to claim 1, further comprising a photoelectric addressing unit connected to the trolley body, the photoelectric addressing unit being configured to cooperate with a photoelectric identification unit disposed on the ground rail to position the transportation trolley.

3. The transportation trolley as claimed in claim 2, further comprising a tow chain support, wherein the tow chain support comprises an extension section and a bending section, the extension section is connected with the trolley body and extends in a direction away from the trolley body, the bending section is connected with the extension section and extends towards one side of the trolley body, on which the walking wheels are arranged, and the photoelectric addressing unit is arranged at the end of the extension section away from the bending section.

4. The transportation cart of claim 1, wherein the body comprises a frame and a base plate, the base plate is secured to the frame, the lifting mechanism is connected to the base plate, the driving mechanism further comprises a driven assembly, both the driving assembly and the driven assembly are connected to the frame, and the base plate is disposed between the driving assembly and the driven assembly.

5. The transportation trolley according to claim 4, wherein the driven assembly comprises a walking driven wheel and a guiding driven wheel, the walking driven wheel and the guiding driven wheel are arranged on two opposite sides of the frame at intervals, the walking driven wheel and the walking wheel are arranged on the same side of the frame, and the guiding driven wheel and the guiding wheel are arranged on the same side of the frame, so that the walking driven wheel and the walking wheel or the guiding driven wheel and the guiding wheel respectively correspond to the same ground rail.

6. The transportation cart of claim 1, wherein the guide wheels comprise a solid portion and an edge portion, the solid portion being cylindrical, the edge portion being connected to the solid portion and extending outwardly therefrom, the edge portion cooperating with the solid portion to define an annular guide channel, the guide channel being located outside the solid portion, the guide channel being configured to receive the ground rail.

7. The transportation trolley according to claim 1, wherein the driving unit comprises a driving motor and a driving gear, the driving motor is in transmission connection with the driving gear, the transmission shaft set comprises a driven gear and a transmission main shaft, the driven gear is sleeved outside the transmission main shaft and is in transmission connection with the transmission main shaft, and the driving gear is in meshing transmission with the driven gear.

8. The transportation trolley according to claim 7, wherein the transmission shaft set further comprises two transmission shaft shafts and two concentric shaft sleeves, the two transmission shaft shafts are respectively connected to two ends of the transmission main shaft, the driven gear is located between the two transmission shaft shafts, each transmission shaft is connected with one end of the transmission main shaft through one concentric shaft sleeve, one end of one transmission shaft, which is far away from the transmission main shaft, is connected with the guide wheel, and the other end of the other transmission shaft, which is far away from the transmission main shaft, is connected with the traveling wheel.

9. The transportation trolley as claimed in claim 8, wherein the driving mechanism further comprises a plurality of deep groove ball bearings, two of the deep groove ball bearings are sleeved on the transmission main shaft and located on two opposite sides of the driven gear, two groups of deep groove ball bearings are respectively sleeved on each transmission wheel shaft, and each group of the two groups of deep groove ball bearings comprises two deep groove ball bearings.

10. The transportation trolley as claimed in claim 1, wherein the carrying platform and the trolley body are respectively located on two opposite sides of the scissor structure, the carrying platform is arranged in parallel with a bottom plate of the trolley body, and the lifting mechanism is used for driving the carrying platform to move closer to or away from the bottom plate in parallel.