Transportation trolley and freight transport system

Abstract

The utility model discloses a transport trolley and a freight transport system, and belongs to the field of transportation. The transport trolley comprises a trolley body and a chassis, the vehicle body is arranged on the chassis, the chassis has a first direction and a second direction which are intersected, and the chassis has a front part and a rear part which are opposite along the first direction; a driving wheel assembly and a follower wheel assembly are arranged on the chassis, the driving wheel assembly is mounted on one of the front part and the rear part, and the follower wheel assembly is mounted on the other one of the front part and the rear part; the follow-up wheel assembly comprises a first follow-up wheel and a second follow-up wheel, an installation part is movably connected to the chassis, the first follow-up wheel and the second follow-up wheel are both installed on the installation part, and the first follow-up wheel and the second follow-up wheel are distributed in the second direction at intervals. In the embodiment of the invention, the mounting piece can be movably connected to the chassis, and the first follower wheel and the second follower wheel are both mounted on the mounting piece, so that the stability of the transport trolley in the moving process can be effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of transportation, and specifically relates to a transport trolley and a freight system. Background Art

[0002] With the development of science and technology, transport carts are increasingly widely used, and goods can be transported by transport carts. Usually, a transport cart has a chassis, on which two driving wheels and two follower wheels are arranged. The driving wheels drive the automatic guided transport cart to move, and the follower wheels rotate as the automatic guided transport cart moves. However, in the related art, during the movement of the transport cart, due to the ups and downs of the ground, one follower wheel may not be in contact with the ground, resulting in the overall instability of the transport cart. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a transport trolley and a freight system, which at least solves the problem of overall instability of the transport trolley due to ground fluctuations.

[0004] In a first aspect, an embodiment of the present application provides a transport trolley, the transport trolley comprising: a body and a chassis;

[0005] The vehicle body is arranged on the chassis, the chassis has a first direction and a second direction intersecting each other, and the chassis has a front portion and a rear portion opposite to each other along the first direction;

[0006] The chassis is provided with a driving wheel assembly and a follower wheel assembly, one of the front part and the rear part is equipped with the driving wheel assembly, and the other part is equipped with the follower wheel assembly;

[0007] The follower wheel assembly includes a first follower wheel and a second follower wheel. A mounting member is movably connected to the chassis. The first follower wheel and the second follower wheel are both mounted on the mounting member, and the first follower wheel and the second follower wheel are spaced apart and distributed along the second direction.

[0008] Optionally, the installation position of the first follower wheel on the installation member is a first position, the installation position of the second follower wheel on the installation member is a second position, and the extension direction of the line connecting the first position and the second position intersects with the second direction.

[0009] Optionally, a straight line passing through the first position and parallel to the first direction is used as a reference straight line, the projection of the first position along the second direction on the reference straight line is a first projection position, the projection of the second position along the second direction on the reference straight line is a second projection position, and along the first direction, the distance between the first projection position and the second projection position is L, satisfying: L>10mm.

[0010] Optionally, the mounting member is movably connected to the chassis via a rotating shaft, and the rotating shaft extends along the first direction;

[0011] Wherein, the rotating shaft is located between the first follower wheel and the second follower wheel.

[0012] Optionally, an installation cavity is provided on the chassis, a rotating hole is provided on the installation member, the rotating shaft passes through the rotating hole, and the opposite ends of the rotating shaft are both located outside the rotating hole, and the opposite ends of the rotating shaft are respectively rotatably connected to the opposite cavity walls of the installation cavity in the first direction.

[0013] Optionally, at least two connecting bosses are provided on the mounting member, and at least two of the connecting bosses are spaced apart along the first direction, and through holes are provided on the connecting bosses. The rotating shaft passes through the through holes on at least two of the connecting bosses, and opposite ends of the rotating shaft are respectively rotatably connected to opposite cavity walls of the mounting cavity in the first direction.

[0014] Optionally, the rotating shaft includes a first sub-shaft and a second sub-shaft;

[0015] A first sleeve and a second sleeve are fixed on the mounting member, the first sleeve and the second sleeve are spaced apart along the first direction, the first sub-shaft is passed through the first sleeve and is rotatably connected to the first cavity wall of the mounting cavity, the second sub-shaft is passed through the second sleeve and is rotatably connected to the second cavity wall of the mounting cavity, and the first cavity wall and the second cavity wall are two cavity walls of the mounting cavity opposite to each other along the first direction.

[0016] Optionally, at least one weight-reducing hole is provided on the mounting member, and the weight-reducing hole passes through the mounting member.

[0017] Optionally, a reinforcement piece is provided in the weight-reducing hole, and opposite ends of the reinforcement piece are respectively fixed to the hole wall of the weight-reducing hole.

[0018] Optionally, the driving wheel assembly includes a first driving wheel and a second driving wheel;

[0019] The first driving wheel is rotatably connected to the chassis, and the first driving wheel is connected to a first driving assembly, and the first driving assembly is used to drive the first driving wheel to rotate;

[0020] The second driving wheel is rotatably connected to the chassis, and the second driving wheel is connected to a second driving assembly, and the second driving assembly is used to drive the second driving wheel to rotate;

[0021] Wherein, the first driving wheel and the second driving wheel are spaced apart and distributed along the second direction.

[0022] Optionally, the wheelbase between the first driving wheel and the second driving wheel is greater than the wheelbase between the first following wheel and the second following wheel.

[0023] In a second aspect, an embodiment of the present application provides a freight system, the freight system comprising a shelf and a transport trolley as described in any one of the first aspects above;

[0024] The transport trolley is used to transport goods to the shelf.

[0025] In the embodiment of the present application, since the disk is provided with a driving wheel assembly and a follower wheel assembly, one of the front and rear parts is installed with a driving wheel assembly, and the other is installed with a follower wheel assembly, once the driving wheel assembly rotates, the driving wheel assembly can drive the vehicle body to move through the chassis, so that the follower wheel assembly will rotate, so that the transport trolley can move. Since the chassis is movably connected with a mounting member, the first follower wheel and the second follower wheel are both installed on the mounting member, therefore, during the movement of the transport trolley, once the transport trolley moves to a position where the ground is undulating, the first follower wheel and / or the second follower wheel will move relative to the chassis, so that the first follower wheel and the second follower wheel are both in contact with the ground. In addition, the first follower wheel and the second follower wheel are spaced apart along the second direction, which can ensure that the first follower wheel and the second follower wheel better support the chassis, so that the transport trolley is relatively stable during the movement. That is, in the embodiment of the present application, by movably connecting the mounting piece on the chassis, and installing the first follower wheel and the second follower wheel on the mounting piece, once the transport trolley moves to a position where the ground is undulating, after one of the first follower wheel and the second follower wheel contacts the ground, the mounting piece will be movable relative to the chassis, so that the other of the first follower wheel and the second follower wheel also contacts the ground, and finally the first follower wheel and the second follower wheel are both in contact with the ground, avoiding the problem that the follower wheels may not contact the ground during the movement of the transport trolley, resulting in the overall instability of the transport trolley. That is, in the embodiment of the present application, by movably connecting the mounting piece on the chassis, and installing the first follower wheel and the second follower wheel on the mounting piece, the stability of the transport trolley during the movement can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram showing a transport trolley provided in an embodiment of the present application;

[0027] Figure 2 One of the schematic diagrams showing a mounting member provided in an embodiment of the present application connected to a mounting cavity via a rotating shaft;

[0028] Figure 3 A second schematic diagram showing a mounting member provided in an embodiment of the present application connected to a mounting cavity via a rotating shaft;

[0029] Figure 4 A third schematic diagram showing a mounting member provided in an embodiment of the present application connected to a mounting cavity via a rotating shaft.

[0030] Reference numerals:

[0031] 10: chassis; 101: mounting cavity; 20: driving wheel assembly; 21: first driving wheel; 22: second driving wheel; 23: first driving assembly; 24: second driving assembly; 231: first motor; 232: first reducer; 241: second motor; 242: second reducer; 30: follower wheel assembly; 31: first follower wheel; 32: second follower wheel; 40: mounting piece; 41: weight-reducing hole; 42: reinforcement piece; 401: connecting boss; 402: first bushing; 403: third bushing; 50: rotating shaft; 51: first sub-shaft; 52: second sub-shaft. DETAILED DESCRIPTION

[0032] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] With the development of intelligent technologies such as the Internet of Things, artificial intelligence, and big data, the demand for transforming and upgrading the traditional logistics industry by using these intelligent technologies has become increasingly strong, and intelligent logistics (ILS, Intelligent Logistics System) has become a research hotspot in the field of logistics. Intelligent logistics uses artificial intelligence, big data, and various information sensors, radio frequency identification technology, global positioning system (GPS, Global Positioning System) and other Internet of Things devices and technologies, which are widely used in basic activities such as material transportation, warehousing, distribution, packaging, loading and unloading, and information services, to achieve intelligent analysis and decision-making, automated operation, and efficient optimization management of the material management process. Internet of Things technologies include sensor equipment, radio frequency identification (RFID, Radio Frequency Identification) technology, laser infrared scanning, infrared sensing recognition, etc. The Internet of Things can effectively connect materials in logistics with the network, monitor materials in real time, and sense environmental data such as humidity and temperature in the warehouse to ensure the storage environment of materials. Through big data technology, all data in logistics can be sensed and collected, uploaded to the data layer of the information platform, and filtered, mined, analyzed, and finally provide accurate data support for business processes (such as transportation, warehousing, storage, picking, packaging, sorting, outbound, inventory, distribution, etc.). The application direction of artificial intelligence in logistics can be roughly divided into two types: 1) Intelligent equipment such as unmanned trucks, automatic guided vehicles (AGVs), autonomous mobile robots (AMRs), forklifts, shuttles, stackers, unmanned delivery vehicles, drones, service robots, robotic arms, smart terminals, etc., which are enabled by artificial intelligence technology, replace some manual labor; 2) Software systems such as transportation equipment management systems, warehouse management, equipment scheduling systems, and order distribution systems driven by technologies or algorithms such as computer vision, machine learning, and operations optimization improve labor efficiency. With the research and progress of smart logistics, this technology has been applied in many fields, such as retail and e-commerce, electronic products, tobacco, medicine, industrial manufacturing, footwear, textiles, and food.

[0036] like Figures 1 to 4 As shown, the transport vehicle includes: a vehicle body (not shown in the figure) and a chassis 10.

[0037] The vehicle body is arranged on a chassis 10, and the chassis 10 has a first direction and a second direction intersecting each other, and the chassis 10 has a front part and a rear part opposite to each other along the first direction; a driving wheel assembly 20 and a follower wheel assembly 30 are arranged on the chassis 10, and the driving wheel assembly 20 is installed on one of the front part and the rear part, and the follower wheel assembly 30 is installed on the other part; the follower wheel assembly 30 includes a first follower wheel 31 and a second follower wheel 32, and a mounting member 40 is movably connected to the chassis 10, and the first follower wheel 31 and the second follower wheel 32 are both installed on the mounting member 40, and the first follower wheel 31 and the second follower wheel 32 are spaced apart and distributed along the second direction.

[0038] In the embodiment of the present application, since the drive wheel assembly 20 and the follower wheel assembly 30 are provided on the disk, one of the front and the rear is equipped with the drive wheel assembly 20, and the other is equipped with the follower wheel assembly 30. Therefore, once the drive wheel assembly 20 rotates, the drive wheel assembly 20 can drive the vehicle body to move through the chassis 10, so that the follower wheel assembly 30 will rotate, so that the transport trolley can move. Since the chassis 10 is movably connected with the mounting member 40, the first follower wheel 31 and the second follower wheel 32 are both mounted on the mounting member 40. Therefore, during the movement of the transport trolley, once the transport trolley moves to a position where the ground is undulating, the first follower wheel 31 and / or the second follower wheel 32 will move relative to the chassis 10, so that the first follower wheel 31 and the second follower wheel 32 are both in contact with the ground. In addition, the first follower wheel 31 and the second follower wheel 32 are spaced apart along the second direction, which can ensure that the first follower wheel 31 and the second follower wheel 32 better support the chassis 10, so that the transport trolley is relatively stable during the movement. That is, in the embodiment of the present application, by movably connecting the mounting member 40 on the chassis 10, and installing the first follower wheel 31 and the second follower wheel 32 on the mounting member 40, once the transport trolley moves to a position where the ground is undulating, after one of the first follower wheel 31 and the second follower wheel 32 contacts the ground, the mounting member 40 will be movable relative to the chassis 10, so that the other of the first follower wheel 31 and the second follower wheel 32 also contacts the ground, so that finally the first follower wheel 31 and the second follower wheel 32 are both in contact with the ground, avoiding the problem that the follower wheels may not contact the ground during the movement of the transport trolley, resulting in the overall instability of the transport trolley. That is, in the embodiment of the present application, by movably connecting the mounting member 40 on the chassis 10, and installing the first follower wheel 31 and the second follower wheel 32 on the mounting member 40, the stability of the transport trolley during the movement can be effectively improved.

[0039] For example, during the movement of the transport trolley, once the transport trolley moves to a position where the ground is undulating, if the first follower wheel 31 is in contact with the ground, and the second follower wheel 32 is not in contact with the ground due to the undulation of the ground, then after the first follower wheel 31 is in contact with the ground, it will be supported by the ground, and the first follower wheel 31 will transfer the support force to the mounting member 40, and the mounting member 40 can move relative to the chassis 10, so that the position of the second follower wheel 32 changes, so that the second follower wheel 32 is in contact with the ground. Specifically, if the first follower wheel 31 is in contact with the ground, while the second follower wheel 32 is not in contact with the ground due to the undulation of the ground, at this time, the first follower wheel 31 can be supported by the ground and the first follower wheel 31 transmits the support force to the mounting member 40. After the mounting member 40 is subjected to the force, the mounting member 40 applies a downward force to the second follower wheel 32, so that the second follower wheel 32 is in contact with the ground downward. Finally, when the transport trolley moves to a position where the ground is undulating, both the first follower wheel 31 and the second follower wheel 32 are in contact with the ground.

[0040] It should be noted that the transport vehicle can be an automated guided vehicle (AGV) or an autonomous mobile robot (AMR), etc. Of course, it can also be other vehicles, which are not listed here one by one.

[0041] In addition, in the embodiment of the present application, the follower wheel assembly 30 can be installed at the front of the chassis 10, and the driving wheel assembly 20 can be installed at the rear of the chassis 10; of course, the driving wheel assembly 20 can also be installed at the front of the chassis 10, and the follower wheel assembly 30 can be installed at the rear of the chassis 10. This embodiment of the present application is not limited here.

[0042] In addition, in the embodiment of the present application, the first direction can be parallel to the direction in which the transport trolley moves, that is, the first direction is parallel to the direction in which the transport trolley moves forward or backward, and the second direction can be perpendicular to the first direction, that is, the angle between the second direction and the first direction is 90°. Of course, the angle between the second direction and the first direction can also be other values, for example, the angle between the second direction and the first direction is 89°, and for another example, the angle between the second direction and the first direction is 92°. In this regard, the embodiment of the present application is not limited here. Among them, the first direction can also be a direction perpendicular to the central axis of the drive wheel assembly 20.

[0043] In addition, in the embodiments of the present application, Figure 1As shown, the driving wheel assembly 20 may include a first driving wheel 21 and a second driving wheel 22; the first driving wheel 21 is rotatably connected to the chassis 10, and the first driving wheel 21 is connected to a first driving assembly 23, and the first driving assembly 23 is used to drive the first driving wheel 21 to rotate; the second driving wheel 22 is rotatably connected to the chassis 10, and the second driving wheel 22 is connected to a second driving assembly 24, and the second driving assembly 24 is used to drive the second driving wheel 22 to rotate; wherein the first driving wheel 21 and the second driving wheel 22 are spaced apart and distributed along the second direction.

[0044] Since the first driving wheel 21 is connected to the first driving assembly 23, and the second driving wheel 22 is connected to the second driving assembly 24, when the transport trolley needs to move, the first driving wheel 21 can be driven to rotate by the first driving assembly 23, and the second driving wheel 22 can be driven to rotate by the second driving assembly 24, so that the transport trolley is subjected to a driving force, and then the first follower wheel 31 and the second follower wheel 32 rotate, and the transport trolley moves. In addition, the first driving wheel 21 and the second driving wheel 22 are spaced apart along the second direction, so that the first driving wheel 21 and the second driving wheel 22 can support the chassis 10 more stably, and ensure that the transport trolley can move more stably. That is, by providing the first driving assembly 23 and the second driving assembly 24, the first driving wheel 21 and the second driving wheel 22 can be easily rotated, and the first driving wheel 21 and the second driving wheel 22 can support the chassis 10 more stably, and ensure that the transport trolley can move smoothly.

[0045] It should be noted that the first drive assembly 23 may include a first motor 231 and a first reducer 232, the first motor 231 is connected to the first reducer 232, the first reducer 232 is connected to the first drive wheel 21, when the first motor 231 is running, the first reducer 232 can convert the speed of the first motor 231, so that the speed transmitted to the first drive wheel 21 is small, so that the first drive wheel 21 rotates at a small speed, driving the transport trolley to move. Wherein, the first motor 231 can be a servo motor, of course, it can also be a stepper motor, for the specific type of the first motor 231, the embodiment of the present application is not limited here. Similarly, the second drive assembly 24 may include a second motor 241 and a second reducer 242, the second motor 241 is connected to the second reducer 242, the second reducer 242 is connected to the second drive wheel 22, when the second motor 241 is running, the second reducer 242 can convert the speed of the second motor 241, so that the speed transmitted to the second drive wheel 22 is small, so that the second drive wheel 22 rotates at a small speed, driving the transport trolley to move. The second motor 241 may be a servo motor, or a stepper motor. The specific type of the second motor 241 is not limited in the embodiment of the present application.

[0046] When the driving wheel assembly 20 includes the first driving wheel 21 and the second driving wheel 22 , the first direction may be perpendicular to the direction from the first driving wheel 21 to the second driving wheel 22 .

[0047] In addition, in some embodiments, the wheelbase between the first driving wheel 21 and the second driving wheel 22 is greater than the wheelbase between the first follower wheel 31 and the second follower wheel 32. With such a configuration, when the first driving wheel 21 and the second driving wheel 22 rotate, it can be ensured that the first follower wheel 31 and the second follower wheel 32 effectively rotate in the direction in which the first driving wheel 21 and the second driving wheel 22 drive the transport trolley to move, thereby ensuring that the transport trolley can move more conveniently.

[0048] In addition, in some embodiments, the installation position of the first follower wheel 31 on the installation member 40 is the first position, the installation position of the second follower wheel 32 on the installation member 40 is the second position, and the extension direction of the line connecting the first position and the second position intersects with the second direction.

[0049] Since there is a gap on the ground, when the transport trolley passes through the gap, that is, when the first follower wheel 31 passes through the gap or the second follower wheel 32 passes through the gap, the first follower wheel 31 or the second follower wheel 32 will be suspended in the air for a short time. If along the second direction, the first follower wheel 31 and the second follower wheel 32 are in the same straight line, at this time, the first follower wheel 31 and the second follower wheel 32 may be suspended in the air at the same time, causing the stability of the transport trolley to be affected during driving. In the embodiment of the present application, by setting the mounting position of the first follower wheel 31 on the mounting member 40 as the first position, and the mounting position of the second follower wheel 32 on the mounting member 40 as the second position, the extension direction of the line connecting the first position and the second position intersects with the second direction, which is equivalent to the mounting position of the first follower wheel 31 on the mounting member 40 and the mounting position of the second follower wheel 32 on the mounting member 40 being misaligned with each other, thereby equivalent to the first follower wheel 31 and the second follower wheel 32 being misaligned with each other along the second direction, that is, the first follower wheel 31 is close to the driving wheel assembly 20, and the second follower wheel 32 is away from the driving wheel assembly 20, or the second follower wheel 32 is close to the driving wheel assembly 20, and the first follower wheel 31 is away from the driving wheel assembly 20, so that when the transport trolley passes through a gap on the ground, the problem of the first follower wheel 31 and the second follower wheel 32 being suspended in the air at the same time is avoided, thereby ensuring that the transport trolley passes through the gap more smoothly. That is, by setting the installation position of the first follower wheel 31 on the installation member 40 to be the first position, and the installation position of the second follower wheel 32 on the installation member 40 to be the second position, the extension direction of the line connecting the first position and the second position intersects with the second direction, so that when the transport trolley passes through the gap, once the first follower wheel 31 is suspended in the air, the second follower wheel 32 and the driving wheel assembly 20 can still support the chassis 10 relatively stably, or the second follower wheel 32 is suspended in the air, the first follower wheel 31 and the driving wheel assembly 20 can still support the chassis 10 relatively stably, thereby ensuring the stability of the movement of the transport trolley.

[0050] It should be noted that, in the embodiment of the present application, along the first direction, the first follower wheel 31 can be close to the driving wheel assembly 20, and the second follower wheel 32 can be away from the driving wheel assembly 20 relative to the first follower wheel 31, that is, in the first direction, the distance between the first follower wheel 31 and the driving wheel assembly 20 is smaller than the distance between the second follower wheel 32 and the driving wheel assembly 20; of course, along the first direction, the second follower wheel 32 can also be made close to the driving wheel assembly 20, and the first follower wheel 31 can be away from the driving wheel assembly 20 relative to the second follower wheel 32, that is, in the first direction, the distance between the second follower wheel 32 and the driving wheel assembly 20 is smaller than the distance between the first follower wheel 31 and the driving wheel assembly 20.

[0051] In addition, in the embodiment of the present application, when the driving wheel assembly 20 includes the first driving wheel 21 and the second driving wheel 22, at this time, once the transport trolley passes through the gap on the ground, if the first follower wheel 31 passes through the gap first, and the first follower wheel 31 is suspended in the air, at this time, the line connecting the second follower wheel 32, the first driving wheel 21 and the second driving wheel 22 forms a triangle, that is, the second follower wheel 32, the first driving wheel 21 and the second driving wheel 22 form a triangular structure, which more stably supports the chassis 10, so that the transport trolley moves stably; if the second follower wheel 32 passes through the gap, and the second follower wheel 32 is suspended in the air, at this time, the line connecting the first follower wheel 31, the first driving wheel 21 and the second driving wheel 22 forms a triangle, and the first follower wheel 31, the first driving wheel 21 and the second driving wheel 22 form a triangular structure, which more stably supports the chassis 10, so that the transport trolley moves stably.

[0052] In addition, in some embodiments, Figure 1 As shown, a straight line passing through the first position and parallel to the first direction is used as a reference straight line, the projection of the first position along the second direction on the reference straight line is a first projection position, and the projection of the second position along the second direction on the reference straight line is a second projection position. Along the first direction, the distance between the first projection position and the second projection position is L, satisfying: L>10mm.

[0053] Since the width of the gap on the ground in the environment where the transport trolley is used is usually 10 mm or close to 10 mm, therefore, the distance between the first projection position and the second projection position along the first direction is set to be L, and L>10 mm, so that when the transport trolley passes through the gap on the ground, the first follower wheel 31 and the second follower wheel 32 can be prevented from entering the gap at the same time, so that the first follower wheel 31 and the second follower wheel 32 are temporarily suspended at the same time, affecting the stability of the movement of the transport trolley. That is, by setting L>10 mm, it can be ensured that when the transport trolley passes through the gap on the ground, one of the first follower wheel 31 and the second follower wheel 32 is temporarily suspended at the gap, and the other of the first follower wheel 31 and the second follower wheel 32 and the driving wheel assembly 20 support the chassis 10, ensuring the stability of the movement of the transport trolley and avoiding the problem of large vibration when the transport trolley passes through the gap.

[0054] It should be noted that the distance L between the first projection position and the second projection position can be any value greater than 10 mm, for example, L is 15 mm, for example, L is 20 mm, and for example, L is 13 mm. The specific value of L is not limited in the present embodiment.

[0055] In addition, in some embodiments, Figure 1As shown, the mounting member 40 is movably connected to the chassis 10 via a rotating shaft 50 , and the rotating shaft 50 extends along a first direction; wherein the rotating shaft 50 is located between the first follower wheel 31 and the second follower wheel 32 .

[0056] Since the mounting member 40 is movably connected to the chassis 10 via the rotating shaft 50 , the mounting member 40 can rotate relative to the rotating shaft 50 , so that the mounting member 40 can move relative to the chassis 10 . Since the rotating shaft 50 is located between the first follower wheel 31 and the second follower wheel 32, when the transport trolley passes through a position with undulating ground, if the first follower wheel 31 contacts the ground and the second follower wheel 32 does not contact the ground, the first follower wheel 31 is supported by the ground, which is equivalent to the first follower wheel 31 being supported by an upward force, so that the position where the first follower wheel 31 is installed on the mounting member 40 is supported by an upward force, and the rotating shaft 50 is located between the first follower wheel 31 and the second follower wheel 32. At this time, the mounting member 40 and the rotating shaft 50 are equivalent to forming a seesaw-like structure, which is equivalent to utilizing the principle of a seesaw. Once the first follower wheel 31 is supported by an upward force, the mounting member 40 will rotate around the rotating shaft 50. At this time, the second follower wheel 32 is supported by a downward force, that is, the position where the second follower wheel 32 is installed on the mounting member 40 applies a downward force to the second follower wheel 32, so that the second follower wheel 32 moves downward until the second follower wheel 32 contacts the ground. Similarly, if the second follower wheel 32 is in contact with the ground and the first follower wheel 31 is not in contact with the ground, the second follower wheel 32 is subjected to an upward force, which also causes the first follower wheel 31 to contact with the ground. That is, by arranging the rotating shaft 50 between the first follower wheel 31 and the second follower wheel 32, the mounting member 40 is equivalent to forming a seesaw-like structure through the rotating shaft 50, so that the first follower wheel 31 and the second follower wheel 32 can be effectively ensured to be in contact with the ground when the transport trolley is at a position where the ground fluctuates, thereby ensuring the stability of the movement of the transport trolley.

[0057] Of course, in the embodiment of the present application, the mounting member 40 and the chassis 10 can be movably connected in other ways, for example, the mounting member 40 is movably connected to the chassis 10 through a hinge. The embodiment of the present application does not limit the way in which the mounting member 40 and the chassis 10 are movably connected.

[0058] In addition, in the embodiment of the present application, the mounting member 40 can be mounted on the chassis 10 via the rotating shaft 50 in different ways, and the following ways are specifically described as examples:

[0059] Method (1): Figure 1 and Figure 2 As shown, an installation cavity 101 is provided on the chassis 10, a rotating hole is provided on the mounting member 40, a rotating shaft 50 is passed through the rotating hole, and the opposite ends of the rotating shaft 50 are both located outside the rotating hole, and the opposite ends of the rotating shaft 50 are respectively rotatably connected to the opposite cavity walls of the installation cavity 101 in the first direction.

[0060] Since the chassis 10 is provided with a mounting cavity 101 and the mounting member 40 is provided with a rotation hole, when the mounting member 40 is movably connected to the chassis 10, the rotating shaft 50 can be directly passed through the rotation hole on the mounting member 40, and the two ends of the rotating shaft 50 are located outside the rotation hole, and the opposite ends of the rotating shaft 50 are rotatably connected to the cavity wall of the mounting cavity 101, so that the mounting member 40 is installed, and the mounting member 40 can rotate around the rotating shaft 50, so that when one of the first follower wheel 31 and the second follower wheel 32 contacts the ground, the other of the first follower wheel 31 and the second follower wheel 32 will contact the ground due to the rotation of the mounting member 40. That is, by providing the rotation hole on the mounting member 40 and passing the rotating shaft 50 through the rotation hole, the mounting member 40 can be easily installed on the chassis 10, and it is ensured that both the first follower wheel 31 and the second follower wheel 32 can contact the ground.

[0061] It should be noted that, along the first direction, rotation grooves can be provided on the opposite cavity walls of the installation cavity 101, and the opposite ends of the rotating shaft 50 are respectively embedded in the two rotation grooves, so that the opposite ends of the rotating shaft 50 are rotatably connected to the cavity walls of the installation cavity 101. Of course, the manner in which the opposite ends of the rotating shaft 50 are respectively rotatably connected to the cavity walls of the installation cavity 101 in the first direction can also be other manners, for example, along the first direction, rotation sleeves can be provided on the opposite cavity walls of the installation cavity 101, and the opposite ends of the rotating shaft 50 are respectively embedded in the two rotating shaft 50 sleeves, so that the opposite ends of the rotating shaft 50 are rotatably connected to the cavity walls of the installation cavity 101. The specific manner in which the opposite ends of the rotating shaft 50 are respectively rotatably connected to the opposite cavity walls of the installation cavity 101 is not limited in the embodiments of the present application.

[0062] In addition, in the embodiment of the present application, the thickness of the mounting member 40 can be made larger, so that a rotating hole is opened on the mounting member 40, which has little effect on the strength of the mounting member 40, ensuring that the mounting member 40 can effectively support the first follower wheel 31 and the second follower wheel 32.

[0063] Method (2): Figure 1 and Figure 3 As shown, at least two connecting bosses 401 can be provided on the mounting member 40, and at least two connecting bosses 401 are spaced apart along the first direction, through holes are provided on the connecting bosses 401, the rotating shaft 50 passes through the through holes on the at least two connecting bosses 401, and the opposite ends of the rotating shaft 50 are respectively rotatably connected to the opposite cavity walls of the mounting cavity 101 in the first direction.

[0064] Since at least two connecting bosses 401 on the mounting member 40 are provided with through holes, when the mounting member 40 is movably connected to the chassis 10, the rotating shaft 50 can be directly passed through the through holes on each connecting boss 401, and the opposite ends of the rotating shaft 50 can be rotatably connected to the cavity wall of the mounting cavity 101 to complete the installation of the mounting member 40. The mounting member 40 can then rotate around the rotating shaft 50, so that when one of the first follower wheel 31 and the second follower wheel 32 contacts the ground, the other of the first follower wheel 31 and the second follower wheel 32 contacts the ground due to the rotation of the mounting member 40. In addition, by providing at least two connecting bosses 401 on the mounting member 40, the connecting bosses 401 can also play a role in strengthening the strength of the mounting member 40, so that the strength of the mounting member 40 is improved, which is conducive to the mounting member 40 supporting the first follower wheel 31 and the second follower wheel 32. That is, by providing a connecting boss 401 on the mounting member 40 and passing the rotating shaft 50 through the through hole on the connecting boss 401, the mounting member 40 can be easily installed on the chassis 10, ensuring that both the first follower wheel 31 and the second follower wheel 32 can contact the ground, and the strength of the mounting member 40 can be improved.

[0065] It should be noted that the number of the connecting bosses 401 can be set according to actual needs. For example, the number of the connecting bosses 401 is 2. For another example, the number of the connecting bosses 401 is 4. The specific number of the connecting bosses 401 is not limited in the embodiment of the present application.

[0066] Method (3): Figure 1 and Figure 4 As shown, the rotating shaft 50 may include a first sub-shaft 51 and a second sub-shaft 52; a first sleeve 402 and a second sleeve are fixed on the mounting member 40, the first sleeve 402 and the second sleeve are spaced apart along the first direction, the first sub-shaft 51 is passed through the first sleeve 402, and is rotatably connected to the first cavity wall of the mounting cavity 101, the second sub-shaft 52 is passed through the second sleeve, and is rotatably connected to the second cavity wall of the mounting cavity 101, and the first cavity wall and the second cavity wall are two cavity walls of the mounting cavity 101 opposite to each other along the first direction.

[0067] Since the first shaft sleeve 402 and the second shaft sleeve are fixed on the mounting member 40, when the mounting member 40 is movably connected to the chassis 10, the first sub-shaft 51 can be directly passed through the first shaft sleeve 402 and rotatably connected to the cavity wall of the mounting cavity 101, and the second sub-shaft 52 can be passed through the second shaft sleeve and rotatably connected to the cavity wall of the mounting cavity. The installation of the mounting member 40 is completed, and the mounting member 40 can rotate around the first sub-shaft 51 and the second sub-shaft 52, so that when one of the first follower wheel 31 and the second follower wheel 32 contacts the ground, the other of the first follower wheel 31 and the second follower wheel 32 will contact the ground due to the rotation of the mounting member 40. That is, by arranging the first shaft sleeve 402 and the second shaft sleeve on the mounting member 40, the mounting member 40 can be installed by means of two half shafts, so that the mounting member 40 is rotatably connected to the cavity wall of the mounting cavity 101, and the length of the first sub-shaft 51 and the second sub-shaft 52 is relatively short, which can also facilitate installation, thereby facilitating the mounting member 40 to be rotatably connected to the cavity wall of the mounting cavity 101.

[0068] It should be noted that, along the first direction, rotation grooves can be provided on the opposite cavity walls of the installation cavity 101, one end of the first sub-axis 51 can be embedded in one rotation groove, and one end of the second sub-axis 52 can be embedded in another rotation groove, so that the first sub-axis 51 is rotationally connected to the cavity wall of the installation cavity 101, and the second sub-axis 52 is rotationally connected to the cavity wall of the installation cavity 101. Of course, rotation sleeves can also be provided on the opposite cavity walls of the installation cavity 101, the first sub-axis 51 is embedded in one rotation shaft 50 sleeve, and the second sub-axis 52 is embedded in another rotation shaft 50 sleeve, so that the first sub-axis 51 is rotationally connected to the cavity wall of the installation cavity 101, and the second sub-axis 52 is rotationally connected to the cavity wall of the installation cavity 101. This embodiment of the present application is not limited here.

[0069] In addition, in some embodiments, Figure 1 As shown, at least one weight-reducing hole 41 is provided on the mounting member 40 , and the weight-reducing hole 41 passes through the mounting member 40 .

[0070] By providing the weight-reducing hole 41 on the mounting member 40, the weight of the mounting member 40 is reduced, and the weight of the transport trolley is reduced, which is conducive to the transport trolley to move faster under the same driving force. That is, by providing the weight-reducing hole 41 on the mounting member 40, the weight of the transport trolley can be effectively reduced and the moving speed of the transport trolley can be increased.

[0071] It should be noted that the number of the weight-reducing holes 41 can be set according to actual needs. For example, the number of the weight-reducing holes 41 is 1, and for another example, the number of the weight-reducing holes 41 is 2. The specific number of the weight-reducing holes 41 is not limited in the embodiment of the present application.

[0072] In addition, in some embodiments, Figure 1 As shown, a reinforcement member 42 is disposed in the weight-reducing hole 41 , and opposite ends of the reinforcement member 42 are respectively fixed to the hole wall of the weight-reducing hole 41 .

[0073] Since the opposite ends of the reinforcing member 42 are respectively fixed to the hole walls of the weight-reducing hole 41, the reinforcing member 42 can effectively strengthen the strength of the part of the mounting member 40 around the weight-reducing hole 41, thereby ensuring that after the weight-reducing hole 41 is opened on the mounting member 40, the strength of the mounting member 40 is less affected, thereby ensuring that the first follower wheel 31 and the second follower wheel 32 on the mounting member 40 can stably support the chassis 10. That is, by arranging the reinforcing member 42 in the weight-reducing hole 41, the strength of the mounting member 40 reduced due to the setting of the weight-reducing hole 41 on the mounting member 40 can be effectively compensated, thereby improving the strength of the mounting member 40, which is beneficial for the follower wheel assembly 30 on the mounting member 40 to support the chassis 10.

[0074] It should be noted that in the embodiment of the present application, the reinforcement member 42 may be a reinforcement rib. Of course, the reinforcement member 42 may also be of other types, for example, the reinforcement member 42 is a reinforcement rod. The embodiment of the present application does not limit the specific type of the reinforcement member 42.

[0075] In the embodiment of the present application, since the drive wheel assembly 20 and the follower wheel assembly 30 are provided on the disk, one of the front and the rear is equipped with the drive wheel assembly 20, and the other is equipped with the follower wheel assembly 30. Therefore, once the drive wheel assembly 20 rotates, the drive wheel assembly 20 can drive the vehicle body to move through the chassis 10, so that the follower wheel assembly 30 will rotate, so that the transport trolley can move. Since the chassis 10 is movably connected with the mounting member 40, the first follower wheel 31 and the second follower wheel 32 are both mounted on the mounting member 40. Therefore, during the movement of the transport trolley, once the transport trolley moves to a position where the ground is undulating, the first follower wheel 31 and / or the second follower wheel 32 will move relative to the chassis 10, so that the first follower wheel 31 and the second follower wheel 32 are both in contact with the ground. In addition, the first follower wheel 31 and the second follower wheel 32 are spaced apart along the second direction, which can ensure that the first follower wheel 31 and the second follower wheel 32 better support the chassis 10, so that the transport trolley is relatively stable during the movement. That is, in the embodiment of the present application, by movably connecting the mounting member 40 on the chassis 10, and installing the first follower wheel 31 and the second follower wheel 32 on the mounting member 40, once the transport trolley moves to a position where the ground is undulating, after one of the first follower wheel 31 and the second follower wheel 32 contacts the ground, the mounting member 40 will be movable relative to the chassis 10, so that the other of the first follower wheel 31 and the second follower wheel 32 also contacts the ground, so that finally the first follower wheel 31 and the second follower wheel 32 are both in contact with the ground, avoiding the problem that the follower wheels may not contact the ground during the movement of the transport trolley, resulting in the overall instability of the transport trolley. That is, in the embodiment of the present application, by movably connecting the mounting member 40 on the chassis 10, and installing the first follower wheel 31 and the second follower wheel 32 on the mounting member 40, the stability of the transport trolley during the movement can be effectively improved.

[0076] An embodiment of the present application provides a freight system, which includes a shelf and a transport trolley according to any one of the first aspects above; the transport trolley is used to transport goods to the shelf.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A transport trolley, characterized in that: The transport trolley comprises: a body and a chassis; The vehicle body is arranged on the chassis, the chassis has a first direction and a second direction intersecting each other, and the chassis has a front portion and a rear portion opposite to each other along the first direction; The chassis is provided with a driving wheel assembly and a follower wheel assembly, one of the front part and the rear part is equipped with the driving wheel assembly, and the other part is equipped with the follower wheel assembly; The follower wheel assembly includes a first follower wheel and a second follower wheel. A mounting member is movably connected to the chassis. The first follower wheel and the second follower wheel are both mounted on the mounting member, and the first follower wheel and the second follower wheel are spaced apart and distributed along the second direction.

2. The transport trolley according to claim 1, characterized in that: The installation position of the first follower wheel on the installation member is a first position, the installation position of the second follower wheel on the installation member is a second position, and the extension direction of the line connecting the first position and the second position intersects with the second direction.

3. The transport trolley according to claim 2, characterized in that: A straight line passing through the first position and parallel to the first direction is used as a reference straight line, the projection of the first position along the second direction on the reference straight line is a first projection position, the projection of the second position along the second direction on the reference straight line is a second projection position, and along the first direction, the distance between the first projection position and the second projection position is L, satisfying: L>10mm.

4. The transport trolley according to claim 1, characterized in that: The mounting member is movably connected to the chassis via a rotating shaft, and the rotating shaft extends along the first direction; Wherein, the rotating shaft is located between the first follower wheel and the second follower wheel.

5. The transport trolley according to claim 4, characterized in that: The chassis is provided with an installation cavity, the installation member is provided with a rotation hole, the rotating shaft is passed through the rotation hole, and the opposite ends of the rotating shaft are both located outside the rotation hole, and the opposite ends of the rotating shaft are respectively rotatably connected to the opposite cavity walls of the installation cavity in the first direction.

6. The transport trolley according to claim 5, characterized in that: At least two connecting bosses are arranged on the mounting member, and at least two of the connecting bosses are spaced apart along the first direction, through holes are arranged on the connecting bosses, the rotating shaft passes through the through holes on at least two of the connecting bosses, and the opposite ends of the rotating shaft are respectively rotatably connected to the opposite cavity walls of the mounting cavity in the first direction.

7. The transport trolley according to claim 5, characterized in that: The rotating shaft includes a first sub-shaft and a second sub-shaft; A first sleeve and a second sleeve are fixed on the mounting member, the first sleeve and the second sleeve are spaced apart along the first direction, the first sub-shaft is passed through the first sleeve and is rotatably connected to the first cavity wall of the mounting cavity, the second sub-shaft is passed through the second sleeve and is rotatably connected to the second cavity wall of the mounting cavity, and the first cavity wall and the second cavity wall are two cavity walls of the mounting cavity opposite to each other along the first direction.

8. The transport trolley according to claim 1, characterized in that: At least one weight-reducing hole is provided on the mounting member, and the weight-reducing hole passes through the mounting member.

9. The transport trolley according to claim 8, characterized in that: A reinforcement piece is arranged in the weight-reducing hole, and opposite ends of the reinforcement piece are respectively fixed to the hole wall of the weight-reducing hole.

10. The transport trolley according to any one of claims 1 to 9, characterized in that: The driving wheel assembly comprises a first driving wheel and a second driving wheel; The first driving wheel is rotatably connected to the chassis, and the first driving wheel is connected to a first driving assembly, and the first driving assembly is used to drive the first driving wheel to rotate; The second driving wheel is rotatably connected to the chassis, and the second driving wheel is connected to a second driving assembly, and the second driving assembly is used to drive the second driving wheel to rotate; Wherein, the first driving wheel and the second driving wheel are spaced apart and distributed along the second direction.

11. The transport trolley according to claim 10, characterized in that: The wheelbase between the first driving wheel and the second driving wheel is greater than the wheelbase between the first following wheel and the second following wheel.

12. A freight system, characterized in that: The freight system comprises a shelf and a transport trolley as described in any one of claims 1 to 11; The transport trolley is used to transport goods to the shelf.

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