CN211140484U

CN211140484U - Conveyer and logistics system

Info

Publication number: CN211140484U
Application number: CN201921848638.5U
Authority: CN
Inventors: 冯宇
Original assignee: Beijing Jingdong Qianshi Technology Co Ltd
Current assignee: Beijing Jingdong Qianshi Technology Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-07-31
Anticipated expiration: 2029-10-30

Abstract

The embodiment of the utility model provides a relate to transportation technical field, especially relate to a conveyer and logistics system. The embodiment of the utility model provides a conveyer includes first wheel mechanism, second wheel mechanism and switching mechanism, and wherein, first wheel mechanism can drive conveyer along first direction reciprocating motion, and second wheel mechanism can drive conveyer along second direction reciprocating motion, and first direction is different with the second direction, and switching mechanism is arranged in selecting one in first wheel mechanism and the second wheel mechanism to drive the conveyer motion to can realize this conveyer towards four direction movements. The embodiment of the utility model provides a logistics system uses the conveyer as mentioned above, through the direction of motion that changes conveyer, alright in order to realize the switching of conveyer at different guide rails to convey the goods to different goods shelves, make logistics system in conveyer's quantity significantly reduce, can effectively reduce logistics system's cost.

Description

Conveyer and logistics system

Technical Field

The embodiment of the utility model provides a relate to transportation technical field, especially relate to a conveyer and logistics system.

Background

The existing intelligent warehouse logistics system comprises a goods shelf, a guide rail set and a shuttle car, wherein the guide rail set comprises a plurality of groups of X-direction guide rails arranged in parallel and a plurality of groups of Y-direction guide rails arranged in parallel, and the shuttle car can realize the purpose of conveying goods to the corresponding goods shelf by sliding on the corresponding guide rails. However, the traditional shuttle vehicle is a bidirectional shuttle vehicle, the shuttle vehicle can only do reciprocating motion along the guide rail in the X direction or the guide rail in the Y direction, the motion form of the shuttle vehicle is single, and the shuttle vehicle cannot be switched among different guide rails, so that one shuttle vehicle needs to be arranged on each guide rail to realize goods transfer of different goods shelves, and the quantity of the shuttle vehicles is large, and the cost of a logistics system is high.

Therefore, it is desirable to provide a transportation device and a logistics system to solve the problems of single movement form of the shuttle and high cost of the logistics system.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a conveyer can realize the effect towards four direction movements.

Another object of the embodiments of the present invention is to provide a logistics system, which can effectively reduce the number of transportation devices and the cost of logistics system by applying the transportation devices.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

a transportation device, comprising:

the first wheel mechanism can drive the transportation device to reciprocate along a first direction;

a second wheel mechanism capable of driving the transportation device to reciprocate in a second direction, the first direction being different from the second direction; and

the switching mechanism is used for selecting one of the first wheel mechanism and the second wheel mechanism to drive the transportation device to move.

Preferably, the second wheel mechanism is movable in a vertical direction relative to the first wheel mechanism, and the switching mechanism is configured to drive the second wheel mechanism to extend out of or into the first wheel mechanism.

Preferably, the switching mechanism includes:

the multi-link transmission assembly can transmit power output by the power assembly to the second wheel mechanism so that the second wheel mechanism moves relative to the first wheel mechanism.

Preferably, the power assembly comprises:

the first motor is arranged on the mounting frame of the transportation device;

the input end of the first speed reducer is connected with the output end of the first motor; and

belt drive structure, include the action wheel, follow driving wheel and endless belt, the action wheel with the output of first reduction gear is connected, it sets up to rotate from the driving wheel on the mounting bracket, the action wheel and follow the common tensioning of driving wheel endless belt, from the driving wheel with many connecting rods drive assembly's input transmission is connected.

Preferably, the multi-link transmission assembly includes:

the middle positions of the two first connecting rods are rotationally connected with the first wheel mechanism;

one end of the second connecting rod is rotatably connected with the first end of one of the first connecting rods, and the other end of the second connecting rod is rotatably connected with the first end of the other first connecting rod;

the horizontal sliding groove is formed in the second wheel mechanism, a rotating wheel is rotatably arranged at the second end of each first connecting rod, and the rotating wheel can slide along the horizontal sliding groove; and

the fixed disk is arranged at the output end of the power assembly, one end of the third connecting rod is rotatably connected with the fixed disk, and the other end of the third connecting rod is fixedly connected with the second connecting rod.

Preferably, the switching mechanism further includes:

and the guide assembly is arranged between the first wheel mechanism and the second wheel mechanism and can enable the second wheel mechanism to move along the vertical direction relative to the first wheel mechanism.

Preferably, the first wheel mechanism includes:

a fixed mount; and

the first roller is rotatably connected with the fixing frame, the central line of the first roller is parallel to the horizontal plane, and the first roller can drive the conveying device to move along the first direction.

Preferably, the first wheel mechanism further includes:

the first guide wheel is rotatably connected to the lower end of the fixing frame, and the central line of the first guide wheel is perpendicular to the horizontal plane.

Preferably, the second wheel mechanism includes:

a movable plate; and

the second roller is rotatably connected with the movable plate, the central line of the second roller is parallel to the horizontal plane, and the second roller can drive the transportation device to move along the second direction.

Preferably, the second wheel mechanism further includes:

and the second guide wheel is rotatably connected to the lower end of the movable plate, and the central line of the second guide wheel is vertical to the horizontal plane.

A logistics system comprising a transportation device as described above.

The utility model discloses a beneficial effect of embodiment:

the embodiment of the utility model provides a conveyer includes first wheel mechanism, second wheel mechanism and switching mechanism, and wherein, first wheel mechanism can drive conveyer along first direction reciprocating motion, and second wheel mechanism can drive conveyer along second direction reciprocating motion, and first direction is different with the second direction, and switching mechanism is arranged in selecting one in first wheel mechanism and the second wheel mechanism to drive the conveyer motion to can realize this conveyer towards the effect of four direction movements.

The embodiment of the utility model provides a logistics system uses the conveyer as mentioned above, through the direction of motion that changes conveyer, alright in order to realize the switching of conveyer at different guide rails to convey the goods to different goods shelves, make logistics system in conveyer's quantity significantly reduce, can effectively reduce logistics system's cost.

Drawings

Fig. 1 is a schematic structural diagram of a logistics system provided by an embodiment of the invention;

fig. 2 is a schematic structural diagram of a guide rail provided in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a transportation device when a first wheel mechanism is in an operating state according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a transportation device with a second wheel mechanism according to an embodiment of the present invention in an operating state;

FIG. 5 is an exploded view of a second wheel mechanism provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a transmission device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a power assembly provided in an embodiment of the present invention;

FIG. 8 is a schematic illustration of a second wheel mechanism according to an embodiment of the present invention in an extended position;

fig. 9 is a schematic structural view of the second wheel mechanism according to the embodiment of the present invention in an extended state.

In the figure:

100. a transportation device; 200. a guide rail set;

201. a first direction U-shaped guide rail; 202. a second direction U-shaped guide rail;

1. a first wheel mechanism; 2. a second wheel mechanism; 3. a switching mechanism; 4. a mounting frame; 5. a vehicle body; 6. a drive mechanism;

11. a fixing plate; 12. a first roller; 13. a first guide wheel; 14. a side plate; 15. mounting a plate; 16. a base plate; 21. a movable plate; 22. a second roller; 23. a second guide wheel; 31. a power assembly; 32. a multi-link transmission assembly; 33. a guide assembly; 61. a second motor; 62. a second decelerator; 63. a second transmission rod; 64. a universal coupling;

211. a limiting plate; 212. a filler strip; 213. an opening; 311. a first motor; 312. a belt drive structure; 313. a first decelerator; 314. a first drive lever; 321. a first link; 322. a second link; 323. a horizontal chute; 324. a third link; 325. fixing the disc; 331. a guide rail; 332. a slider;

3121. a driving wheel; 3122. a driven wheel; 3123. an endless belt; 3221. a rotating wheel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To one of ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a logistics system provided by an embodiment of the present invention, as shown in fig. 1, the logistics system includes a guide rail set 200, a shelf and a transportation device 100 for carrying goods, the transportation device 100 is disposed on the guide rail set 200 and can move along a guide rail in the guide rail set 200, thereby realizing a function of transporting goods to different shelves. Wherein, conveyer 100 includes automobile body 5 and two sets of wheel group, and along as shown in FIG. 1Y direction (first direction), two sets of wheel group set up in the both sides of automobile body 5 along the Y direction, can realize the more stable support to automobile body 5 through setting up two sets of wheel groups, guarantee conveyer 100's steady transportation.

In order to realize the movement of the transportation device 100 along the Y direction, each set of wheel sets includes a first wheel mechanism 1, the first wheel mechanism 1 includes a fixed frame, a first roller 12 and a first guide wheel 13, and the fixed frame includes a fixed plate 11, a side plate 14, a mounting plate 15 and a bottom plate 16. The fixed plate 11 and the mounting plate 15 are located on two sides of the bottom plate 16 along the Y direction, the fixed plate 11 and the mounting plate 15 are arranged in parallel, the two side plates 14 are located on two sides of the bottom plate 16 along the X direction (second direction), the two side plates 14 are arranged in parallel, the two side plates 14, the fixed plate 11 and the mounting plate 15 jointly form a containing space for containing parts, and the mounting plate 15 is mounted on the vehicle body 5. Each side plate 14 is rotatably provided with a first roller 12, the center line of the first roller 12 is parallel to the X direction, and when the first roller 12 rotates, the first roller 12 can drive the transportation device 100 to move along the Y direction.

In addition, the first direction U-shaped guide rail 201 extends along the Y direction, the longitudinal section of the first direction U-shaped guide rail 201 is U-shaped, and when the first roller 12 rolls in the first direction U-shaped guide rail 201, the first roller is easy to deflect in the X direction. When the transportation device 100 moves along the Y direction, the outer periphery of the first guide wheel 13 is in butt fit with the side wall of the first direction U-shaped guide rail 201, so that a good guiding effect for transporting the transportation device 100 along the Y direction can be realized, and the transportation device 100 is prevented from deflecting in the X direction.

As shown in fig. 2, the guide rail set 200 further includes a plurality of second direction U-shaped guide rails 202 arranged along the Y direction, the second direction U-shaped guide rails 202 extending along the X direction, and a position where the first direction U-shaped guide rails 201 intersect with the second direction U-shaped guide rails 202. In order to switch the movement of the transportation device 100 on the first direction U-shaped guide 201 and the second direction U-shaped guide 202, the transportation device 100 further includes a second wheel mechanism 2 and a switching mechanism 3. The second wheel mechanism 2 can drive the transportation device 100 to reciprocate along the X direction, and the switching mechanism 3 is used for selecting one of the first wheel mechanism 1 and the second wheel mechanism 2 to drive the transportation device 100 to move, so that the transportation device 100 can move towards four directions. The embodiment of the utility model provides a logistics system uses as last conveyer 100, through the direction of motion that changes conveyer 100, alright in order to realize conveyer 100 in the switching of different guide rails, can realize conveying the goods to different goods shelves, makes logistics system in conveyer 100's quantity significantly reduce, can effectively reduce logistics system's cost.

As shown in fig. 3, 4 and 5, the second wheel mechanism 2 can move in a vertical direction relative to the first wheel mechanism 1, and the switching mechanism 3 can drive the second wheel mechanism 2 to extend out of or into the first wheel mechanism 1, so as to switch the movement of the transportation device 100 in the Y direction and the movement in the X direction. Referring to fig. 1 and 3, when the switching mechanism 3 extends the second wheel mechanism 2 into the first wheel mechanism 1, the first roller 12 can contact with the guide rail, the second roller 22 is separated from the guide rail, and the first wheel mechanism 1 can drive the transportation device 100 to move along the Y direction. Referring to fig. 1 and 4, when the switching mechanism 3 extends the second wheel mechanism 2 out of the first wheel mechanism 1, the second roller 22 can contact with the guide rail, the first roller 12 is separated from the guide rail, and the second wheel mechanism 2 can drive the transportation device 100 to move in the X direction.

Specifically, as shown in fig. 1, 5 and 6, the second wheel mechanism 2 includes a movable plate 21 and a second roller 22, the second roller 22 is rotatably connected to the movable plate 21, a center line of the second roller 22 is parallel to the Y direction, and when the second roller 22 rotates relative to the movable plate 21 and the second roller 22 abuts on the second direction U-shaped rail 202, the second roller 22 can drive the transportation device 100 to move in the X direction.

In addition, as shown in fig. 1 and 3 to 6, the longitudinal section of the second direction U-shaped rail 202 is U-shaped, and the second roller 22 is easily deflected in the Y direction when rolling in the second direction U-shaped rail 202, and in order to solve the above problem, the second wheel mechanism 2 further includes a second guide wheel 23, the second guide wheel 23 is rotatably connected to the lower end of the side plate 14, and the second guide wheel 23 and the second roller 22 are arranged in the X direction, and the center line of the second guide wheel 23 is perpendicular to the XY plane, and when the transportation device 100 moves in the X direction, the outer periphery of the second guide wheel 23 is in contact fit with the side wall of the second direction U-shaped rail 202, so that a good guiding effect on the transportation direction of the transportation device 100 can be achieved, and the transportation device 100 is prevented from being deflected in the Y direction when moving in the X direction.

As shown in fig. 6, in order to drive the first roller 12 and the second roller 22, the transportation device 100 of the present embodiment further includes a driving mechanism 6. The drive 6 is arranged in the receiving space of the left wheel set, the two first rollers 12 of which are connected by a rotary shaft. The driving mechanism 6 includes a second motor 61, a second reducer 62, a second transmission rod 63 and a universal coupling 64, the second reducer 62 includes an input end and three output ends, the output end of the second motor 61 is connected with the input end of the second reducer 62 in a transmission manner, the output end of the second reducer 62 located at the left side is connected with the second roller 22 of the left wheel set through the universal coupling 64, the output end of the second reducer 62 located at the right side is connected with the second roller 22 of the right wheel set sequentially through the second transmission rod 63 and the universal coupling 64, the output shaft of the second reducer 62 located at the front end is connected with the rotation shaft in a transmission manner through a belt transmission mechanism or a gear mechanism, so when the second motor 61 works, through the power transmission of the second reducer 62, two first rollers 12 of the left wheel set can rotate, and one second roller 22 of the left wheel set and the second roller 22 of the right wheel set, which is directly opposite to the second roller 22 Can rotate.

As shown in fig. 6, the switching mechanism 3 includes a power assembly 31 and a multi-link transmission assembly 32, and the multi-link transmission assembly 32 can transmit power output by the power assembly 31 to the second wheel mechanism 2 to move the second wheel mechanism 2 relative to the first wheel mechanism 1. Because the space occupied by the multi-link transmission assembly 32 is small, the size of the transportation device 100 can be effectively reduced and the space occupancy rate of the logistics system can be effectively reduced by arranging a part of the switching mechanism 3 as a multi-link structure.

To facilitate understanding of the specific structure of the power assembly 31, as shown in fig. 7, the transportation device 100 further includes two mounting frames 4 disposed on the vehicle body 5, the power assembly 31 is located in the accommodating space of the right wheel set, the power assembly 31 includes a first motor 311, a first speed reducer 313 and a belt transmission structure 312, the first motor 311 is disposed on the mounting frame 4 of the transportation device 100, an input end of the first speed reducer 313 is connected with an output end of the first motor 311, the belt transmission structure 312 includes a driving wheel 3121, a driven wheel 3123 and an endless belt 3122, the driving wheel 3121 is connected with the output end of the first speed reducer 313, the driven wheel 3123 is rotatably disposed on the mounting frame 4, the driving wheel 3121 and the driven wheel 3123 jointly tension the endless belt 3122, and the driven wheel 3123 is in transmission connection with an input end of the multi-link. In addition, in order to realize that one first motor 311 drives the multi-link transmission assemblies 32 in the left wheel set and the right wheel set simultaneously, and ensure synchronous lifting of the second wheel mechanisms 2 in the left wheel set and the right wheel set, as shown in fig. 7, the power assembly 31 further includes a first transmission rod 314, one end of the first transmission rod 314 is coaxially connected with the driven wheel 3123, and the other end of the first transmission rod 314 is in transmission connection with the input end of the multi-link transmission assembly 32 in the left wheel set, when the first motor 311 works, the two multi-link transmission assemblies 32 can be driven to act simultaneously, and the volume and the space of the transportation device 100 can be effectively saved.

To facilitate understanding of the specific structure of the multi-link transmission assembly 32, as shown in fig. 6, 8 and 9, the multi-link transmission assembly 32 includes two first links 321, a second link 322, a horizontal sliding groove 323, a third link 324 and a fixing plate 325, wherein the two first links 321 are rotatably connected to the first wheel mechanism 1 at a middle position of the first link 321, one end of the second link 322 is rotatably connected to a first end of one of the first links 321, and the other end of the second link 322 is rotatably connected to a first end of the other first link 321. The second wheel mechanism 2 is provided with a horizontal sliding groove 323, a rotating wheel 3221 is rotatably arranged at the second end of each first connecting rod 321, and the rotating wheel 3221 can slide along the horizontal sliding groove 323. The driven wheel 3123 in the right wheel set is provided with a fixed disk 325, the end of the first transmission rod 314 extending into the left wheel set is also provided with a fixed disk 325, each fixed disk 325 is connected with the corresponding first connecting rod 321 of the fixed disk 325 through a third connecting rod 324, wherein the third connecting rod 324 is rotatably connected with the fixed disk 325, and the third connecting rod 324 is fixedly connected with the first connecting rod 321.

To facilitate the formation of the horizontal sliding groove 323 on the second wheel mechanism 2, as shown in fig. 6, 8 and 9, the movable plate 21 includes a limiting plate 211 and a filler strip 212, the limiting plate 211 and the filler strip 212 are fixed to the upper end of the body of the movable plate 21 by a fixing member, and a space between the limiting plate 211 and the filler strip 212 is the horizontal sliding groove 323. In addition, the limiting plate 211 and the pad strip 212 may be made of rubber, which can reduce the wear of the rotating wheel 3221 and improve the service life of the rotating wheel 3221.

In addition, as shown in fig. 6, 8 and 9, in order to avoid the interference between the movable plate 21 and the third connecting rod 324, the opening 213 is formed on the movable plate 21, and when the multi-link transmission assembly 32 operates, the third connecting rod 324 can be prevented from colliding with the movable plate 21 by the opening 213.

For the convenience of understanding that the power assembly 31 and the multi-link transmission assembly 32 cooperate to drive the second wheel mechanism 2 to move in the vertical direction relative to the first wheel mechanism 1, the operation of the power assembly 31, the multi-link transmission assembly 32, the second wheel mechanism 2 and the first wheel mechanism 1 will be described with reference to fig. 6 and 8 to 9:

as shown in fig. 6, when the first motor 311 is operated, the first speed reducer 313 transmits power output by the first motor 311 to the driving wheel 3121 of the belt transmission structure 312, and the driven wheel 3123 rotates relative to the mounting frame 4 under the action of the endless belt 3122, and the driven wheel 3123 rotates the fixed disc 325 of the two wheel sets. As shown in fig. 8, when the first motor 311 operates to drive the first link 321 to be in the first state, the second wheel mechanism 2 is driven by the multi-link transmission assembly 32 to be in a state of extending into the fixed plate 11. As shown in fig. 9, when the first motor 311 is operated to drive the first link 321 to move to the second state shown in fig. 9, the first link 321 causes the second link 322 to rotate clockwise, the wheel 3221 slides rightward along the horizontal sliding slot 323, and the wheel 3221 drives the movable plate 21 to move downward relative to the fixed plate 11, so that the second roller 22 and the second guide wheel 23 of the second wheel mechanism 2 extend out of the fixed plate 11.

In addition, as shown in fig. 5, 6, and 8 to 9, in order to ensure that the second wheel mechanism 2 can move in the vertical direction with respect to the first wheel mechanism 1 well, the switching mechanism 3 further includes a guide assembly 33, and the guide assembly 33 is disposed between the first wheel mechanism 1 and the second wheel mechanism 2 and can move the second wheel mechanism 2 in the vertical direction with respect to the first wheel mechanism 1. Specifically, the guide assembly 33 includes a guide rail 331 and a sliding block 332, wherein the guide rail 331 extends in a vertical direction and is disposed on the fixed plate 11, the sliding block 332 is disposed on the movable plate 21, and the sliding block 332 is fastened to the guide rail 331 and can slide in the vertical direction relative to the guide rail 331, so that the movable plate 21 can be ensured to slide in the vertical direction relative to the fixed plate 11, and the movable plate 21 is prevented from being inclined in the sliding process.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transportation device, comprising:

the first wheel mechanism (1) can drive the transportation device (100) to reciprocate along a first direction;

a second wheel mechanism (2) capable of driving the transport device (100) to reciprocate in a second direction, the first direction being different from the second direction; and

the switching mechanism (3) is used for selecting one of the first wheel mechanism (1) and the second wheel mechanism (2) to drive the transportation device (100) to move.

2. A transportation device according to claim 1, characterized in that the second wheel mechanism (2) is movable in a vertical direction in relation to the first wheel mechanism (1), and that the switching mechanism (3) is capable of driving the second wheel mechanism (2) out of or into the first wheel mechanism (1).

3. A transportation device according to claim 2, characterized in that the switching mechanism (3) comprises:

a power assembly (31) and a multi-link transmission assembly (32), wherein the multi-link transmission assembly (32) can transmit the power output by the power assembly (31) to the second wheel mechanism (2) so that the second wheel mechanism (2) moves relative to the first wheel mechanism (1).

4. A transportation device according to claim 3, characterized in that the power assembly (31) comprises:

a first motor (311) arranged on a mounting frame (4) of the transport device (100);

a first speed reducer (313) with an input end connected with an output end of the first motor (311); and

belt transmission structure (312), including action wheel (3121), follow driving wheel (3123) and endless belt (3122), action wheel (3121) with the output of first reduction gear (313) is connected, follow driving wheel (3123) and rotate and set up on mounting bracket (4), action wheel (3121) and follow driving wheel (3123) take up jointly endless belt (3122), follow driving wheel (3123) with the input transmission of many connecting rods transmission assembly (32) is connected.

5. A transportation device according to claim 3, characterized in that the multi-link transmission assembly (32) comprises:

two first connecting rods (321), wherein the middle positions of the first connecting rods (321) are in rotary connection with the first wheel mechanism (1);

one end of the second connecting rod (322) is rotatably connected with the first end of one of the first connecting rods (321), and the other end of the second connecting rod (322) is rotatably connected with the first end of the other first connecting rod (321);

the horizontal sliding groove (323) is formed in the second wheel mechanism (2), a rotating wheel (3221) is rotatably arranged at the second end of each first connecting rod (321), and the rotating wheel (3221) can slide along the horizontal sliding groove (323); and

third connecting rod (324) and fixed disk (325), fixed disk (325) set up the output of power component (31), the one end of third connecting rod (324) with fixed disk (325) rotate to be connected, the other end of third connecting rod (324) with second connecting rod (322) fixed connection.

6. A transporting arrangement as claimed in any one of claims 2 to 5, characterised in that the switching mechanism (3) further comprises:

a guide assembly (33) arranged between the first wheel mechanism (1) and the second wheel mechanism (2) and enabling the second wheel mechanism (2) to move in a vertical direction relative to the first wheel mechanism (1).

7. A transporting arrangement as claimed in any one of claims 1 to 5, characterised in that the first wheel mechanism (1) comprises:

a fixed mount; and

the first roller (12) is rotatably connected with the fixed frame, the central line of the first roller (12) is parallel to the horizontal plane, and the first roller (12) can drive the conveying device (100) to move along the first direction.

8. Transport device according to claim 7, characterized in that the first wheel mechanism (1) further comprises:

the first guide wheel (13) is rotatably connected to the lower end of the fixing frame and is arranged along the first direction with the first roller (12), and the central line of the first guide wheel (13) is perpendicular to the horizontal plane.

9. A transporting arrangement as claimed in any one of claims 1 to 5, characterised in that the second wheel mechanism (2) comprises:

a movable plate (21); and

the second roller (22) is rotatably connected with the movable plate (21), the central line of the second roller (22) is parallel to the horizontal plane, and the second roller (22) can drive the transportation device (100) to move along the second direction.

10. A transporting arrangement as claimed in claim 9, characterised in that the second wheel mechanism (2) further comprises:

and the second guide wheel (23) is rotatably connected to the lower end of the movable plate (21) and is arranged along the second direction with the second roller (22), and the central line of the second guide wheel (23) is vertical to the horizontal plane.

11. A logistics system, characterized by comprising a transportation device (100) according to any one of claims 1 to 10.