Trailers and trailer components

Abstract

The present application discloses a trailer and a trailer assembly. The trailer comprises a trailer frame and a towing connection, the trailer frame comprises opposite trailer frame sides, each side of the trailer frame sides is provided with the towing connection, and each of the towing connections is used to connect with an object side of a towed object. Thus, the trailer has at least the following advantages: a, the trailer is connected with the object side of the towed object, and the bottom and / or the related structure of the bottom of the towed object is not damaged; b, the object side and the trailer frame side are both visible parts, and the trailer and the towed object are convenient to dock; c, the object side is convenient to set a docking structure connected with the towing connection, and the docking structure (a docking hole or a docking column) reserved in the object side can also be used without setting an additional docking structure.

Description

Technical Field

[0001] This application relates to vehicles, and more particularly to trailers and trailer components. Background Technology

[0002] Some towed objects may become immobile due to malfunctions, depleted power, or other abnormal conditions, such as brake failure of the drive wheels or high friction between the towed object and the ground. These towed objects include AGVs (Automated Guided Vehicles), also known as automated guided vehicles.

[0003] To solve the above problems, a forklift, pallet jack, or other structure is generally used to access the bottom of the object being towed, lift the object, and then tow it. This method has the following disadvantages: a) Because the docking is at the bottom, and / or the bottom has related structures, the bottom of the towed object may be damaged when the trailer docks with it. For example, if the towed object is an AGV (Automated Guided Vehicle), the bottom of the AGV may have dust-collecting brushes installed due to functional requirements, which could damage the dust-collecting brushes; b) Because the trailer docks with the towed object at its bottom, the connection between the trailer and the towed object is inconvenient. Utility Model Content

[0004] The purpose of this application is to disclose a trailer and trailer assembly. The trailer is easy to connect to a towed object without damaging the bottom of the trailer or any structure located thereon.

[0005] In a first aspect, this application discloses a trailer. The trailer includes a trailer frame and a towing connector. The trailer frame includes opposing trailer frame sides, and each trailer frame side is provided with the towing connector. Each towing connector is used to connect to the object side of a towed object.

[0006] In some embodiments, the trailer includes a tipping frame connected to the trailer frame via a lever structure, wherein each of the towing connectors is held in place by the tipping frame under the action of the lever when the tipping frame is in its initial position.

[0007] In some embodiments, the drag connector includes a drag connection portion; the trailer includes a connecting shaft for insertion into a pre-reserved docking structure on the side of the object, and is also located in the drag connection portion.

[0008] In some embodiments, at least a portion of the drag connector includes a drag connector and a telescopic structure, the telescopic structure being connected to the drag connector, the drag connector extending or retracting under the action of the telescopic structure.

[0009] In some embodiments, the trailer frame includes a trailer handle, the trailer frame includes opposing trailer frame sides and a connecting portion located between the trailer frame sides, the connecting portion being connected to the trailer handle; the trailer frame sides and the connecting portion form an opening for a towed object to enter.

[0010] In some embodiments, the trailer includes connecting objects and pin assemblies corresponding to each connecting object, with each connecting object connected to the trailer frame via a pin assembly. Each pin assembly includes a pin, a limiting member, and a locking member. The pin passes through both the connecting object and the trailer frame. The limiting member acts as a lever and is connected to the pin. The limiting member is locked by the locking member to either the connecting object or the trailer frame to constrain the pin's circumferential rotation and axial movement.

[0011] In some embodiments, one of the pin and the limiting member includes a socket and the other includes a post, the post being inserted into the socket in a first direction perpendicular to the axial direction of the pin.

[0012] In some implementations, the connection object includes at least one of the towing connector and the trailer handle.

[0013] In some embodiments, there is only one insertion hole, which is located on the pin, and the limiting member includes the insertion post.

[0014] In some embodiments, the locking element is a screw.

[0015] Secondly, this application discloses a trailer assembly. The trailer assembly includes any of the aforementioned trailers and the towed object, the towed object being connected to the trailer.

[0016] In some embodiments, the trailer assembly includes an auxiliary support member connected to the towed object via a connecting assembly, the connecting assembly having the same configuration as the pin assembly; or, the auxiliary support member is locked to the towed object by screws; or, the towed object is an AGV vehicle.

[0017] For the trailer and trailer assembly, the trailer is connected to the side of the towed object via a towing connector located on the side of the trailer frame. Since the trailer and the towed object do not dock at the bottom of the towed object, this offers at least the following advantages: a) It avoids docking the trailer to the towed object at its bottom, preventing damage to the bottom of the towed object and / or related structures located thereon; b) Both the object side and the trailer frame side are visible, facilitating docking; c) The object side allows for the installation of a docking structure with the towing connector, and pre-existing docking structures (dock holes or docking posts) on the object side can be utilized without requiring additional docking structures. Towed objects typically have pre-existing docking structures for ease of lifting, etc. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a trailer according to this application, showing the tipping frame in a tipped state;

[0019] Figure 2 This is a schematic diagram of a trailer according to this application, showing the tipping frame in a non-tilted state;

[0020] Figure 3 yes Figure 2 Enlarged view of section A;

[0021] Figure 4 yes Figure 2 Enlarged view of section B;

[0022] Figure 5 This is a schematic diagram of a limiting component according to this application;

[0023] Figure 6 yes Figure 2 A top view of the trailer shown;

[0024] Figure 7 It is along Figure 6 A cross-sectional view along the CC line, showing the drag-and-drop connection in an extended state;

[0025] Figure 8 It is along Figure 6 A cross-sectional view of the DD line shows the drag-and-drop connection in a retracted state;

[0026] Figure 9 This is a schematic diagram of a trailer assembly according to this application;

[0027] Figure 10 yes Figure 9 Enlarged view of section E in the middle;

[0028] Figure 11 yes Figure 9 Enlarged view of section F in the middle;

[0029] Figure 12 yes Figure 9 A diagram showing the removal of the dragged object;

[0030] Figure 13 yes Figure 9 A schematic diagram of the auxiliary support component. Detailed Implementation

[0031] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0033] See Figure 1 , Figure 2 , Figure 6 and Figure 12 This application discloses a trailer 10. The trailer frame 1 includes opposing trailer frame sides 12, and each side of the trailer frame side 12 is provided with the towing connector 4. See also Figure 9 Each of the drag connectors 4 is used to connect to the object side 201 of the dragged object 20. The connection method is not limited, as long as the dragged object 20 can be dragged away.

[0034] As described above, this application connects to the object side 201 of the towed object 20 via the towing connector 4 located on the side 12 of the trailer frame. Since the trailer 10 and the towed object 20 do not dock at the bottom of the towed object 20, this provides at least the following advantages: a) It avoids docking the trailer to the towed object at its bottom, preventing damage to the bottom of the towed object 20 and / or related structures located at its bottom; b) Both the object side 201 and the trailer frame side 12 are visible parts, facilitating docking between the trailer 10 and the towed object 20 without docking at the bottom; c) The object side 201 facilitates the installation of a docking structure with the towing connector 4, and the pre-installed docking structure (dock hole or docking post) on the object side 201 can be used without requiring an additional docking structure. Towed objects typically have pre-installed docking structures for ease of lifting, etc.

[0035] See Figure 1 , Figure 2 , Figure 6 , Figure 9 and Figure 12 The trailer 10 includes a tilting frame 6, which is connected to the trailer frame 1 via a lever structure. The lever structure is not limited, as long as it allows the tilting frame 6 to rotate relative to the trailer frame 1. Figure 1 This shows the tilting frame 6 tilting to its final position. Figure 2 , Figure 6 , Figure 9 and Figure 12 The diagram illustrates the flipping frame 6 flipping from its final position to its initial position. In the initial position, the flipping frame 6 is stacked on top of the trailer frame 1; however, in the initial position, the flipping frame 6 may not be stacked on top of the trailer frame 1. Each towing connector 4 is held in place by the flipping frame 6 under leverage, completing the connection between the towing connector 4 and the towed object 20. The following example, using an object side 201 with a docking hole and a trailer 10 including a connecting shaft 7, illustrates the above process in more detail:

[0036] The connecting shaft 7 is inserted into the receiving hole 121 on the side of the trailer frame 12. This facilitates the placement of the connecting shaft 7 and prevents it from being lost, etc. Figure 10 The diagram illustrates that the receiving hole 121 is visible after the connecting shaft 7 is pulled out. When it is necessary to move the object 20 being moved, the connecting shaft 7 is pulled out and then inserted into the mating hole; the flipping frame 6 is then flipped to... Figure 1 The state shown is then applied; subsequently, a force is applied to the tilting frame 6 to return it to its initial state, thus holding the drag connector 4 in place. (Comparison) Figure 10 and Figure 7After the drag connector 4 is held in place, the connecting shaft 7 is located inside the drag connection portion 41 of the drag connector 4. Then, the towed object 20 can be moved by the trailer 10. In the above embodiment, the connecting shaft 7 can also be inserted after the drag connection portion 41 is aligned with the docking hole. In summary, the function of the flipping frame 6 in holding the drag connector 4 is to ensure that the drag connection portion of the drag connector 4 is aligned with the corresponding part of the object side 201, ultimately achieving the connection between the two.

[0037] As described above, the tilting frame 6 is connected to the trailer frame 1 via a lever structure, and the tilting frame 6 is tilted using the lever principle. In its initial position, the tilting frame 6 holds the drag connector 4 in place, and finally the drag connector 4 connects to the object side 201, making the connection convenient and effortless. The drag connector 41 described above is a notch, but it is not limited to this. In some cases, the drag connector 41 can also be a through hole. In this case, the connecting shaft 7 passes through the through hole and connects to the object side 201.

[0038] In the above embodiments, the docking structure on the object side 201 is a docking hole. In some embodiments, the reserved docking structure on the object side 201 can also be a reserved docking post 2011. In this case, the connecting shaft 7 can be tubular and inserted into the docking post. Regardless of the method, the connection shaft 7 and the docking structure of the object side 201 can be docked. In summary, the docking of the connecting shaft 7 with the docking structure of the object side 201 of the dragged object is also located in the dragging connection part 41, making it convenient for the dragging connector 4 to connect with the object side of the dragged object 20.

[0039] See Figure 1 , Figure 2 , Figures 6 to 8 The trailer frame 1 includes opposing trailer frame sides 12, each of which is provided with a towing connector 4. Each towing connector 4 includes a towing connection part 41 and a telescopic structure 42, the telescopic structure 42 being connected to the towing connection part 41. Alternatively, only some of the towing connectors 4 may have a telescopic structure; for example, only one of the opposing towing connectors 4 may have a telescopic structure. Under the action of the telescopic structure 42, the towing connection part 41 extends or retracts. The structure of the telescopic structure 42 is not limited, as long as it enables the extension or retraction of the towing connection part 41. For example, the telescopic structure 42 includes a fixed tube 421, a telescopic tube 422, and a fixing element (not shown in the figure). The fixed tube 421 includes a through hole connecting the interior and exterior of the fixed tube 421. The telescopic tube 422 is connected to the towing connector 41. The telescopic tube 422 is inserted into the fixed tube 421, so that the telescopic tube 422 can be extended or retracted relative to the fixed tube 421. Figure 7 The diagram shows the telescopic tube 422 extending relative to the fixed tube 421. Figure 8 This shows the telescopic tube 422 retracting to its initial position.

[0040] As described above, by extending or retracting the telescopic structure 42, the distance between the towing connection parts 41 on the opposite trailer frame side 12 can be adjusted, thereby adapting to towed objects 20 of different sizes, making it more convenient to use the trailer 10.

[0041] See Figure 1 , Figure 2 , Figure 6 and Figure 12 The trailer frame 1 includes opposing trailer frame sides 12 and a connecting portion 11 located between the trailer frame sides 12. The connecting portion 11 can be connected to the trailer handle 3 via the pin assembly 2, or via a structure different from the pin assembly 2. The trailer frame sides 12 and the connecting portion 11 form an opening 13 for the towed object 20 to enter. The state of the towed object 20 after entering the opening 13 is as follows... Figure 9 As shown. The opening 13 is not limited to a U-shape, as long as it can accommodate at least a portion of the object 20 being dragged.

[0042] As described above, by setting the opening 13, the trailer 10 moves toward the towed object 20 so that the towed object 20 is behind the opening 13, and then the trailer 10 is connected to the towed object 20, thus making the connection convenient.

[0043] See Figure 1 , Figure 2 , Figure 6 , Figure 9 and Figure 12The trailer 10 includes a connecting object and a pin assembly 2. Of course, for the trailer, the connection between the connecting object and the trailer frame may not use any of the pin assemblies 2 described in this application. The connecting object is a general term for components that need to be connected to the trailer frame 1 via the pin assembly 2. For example, the connecting object includes at least one of the trailer handle 3 and the towing connector 4. Alternatively, the connecting object may not include at least one of the trailer handle 3 and the towing connector 4. Any of the pin assemblies 2 in this application can be used not only to connect the connecting object to the trailer frame 1, but also to connect related components of other equipment, such as the connection of the inner and outer forks, or the connection between the forks and the base plate in a scissor lift mechanism; the connection between the cylinder and the bracket in a translation mechanism; or the connection between the electric cylinder and the bracket. The towing connector 4 is used to connect the towed object 20, and its structure is not limited. The towed object 20 is, for example, an AGV vehicle. The AGV vehicle can be a differential AGV vehicle or a steering wheel AGV vehicle. The differential type refers to controlling the speed difference between two independent drive wheels to achieve steering and movement of the AGV. The steering wheel type refers to an integrated drive unit that combines a drive motor, steering motor, and reducer to drive the AGV. Depending on the needs, the AGV can be equipped with one or more steering wheels. Each pin assembly 2 corresponds one-to-one with a connecting object. Each connecting object is connected to the trailer frame 1 through its respective pin assembly 2. For example, when the trailer 10 only includes a trailer handle 3 and two towing connectors 4, the trailer handle 3 is connected to the trailer frame 1 through one pin assembly 2, and each towing connector 4 is connected to the trailer frame 1 through one pin assembly 2. Thus, the trailer 10 includes three pin assemblies 2.

[0044] See Figure 3 and Figure 5 The pin assembly 2 includes a pin 21, a limiting member 22, and a locking member 23. The pin 21 passes through the connecting object and the trailer frame 1. Figure 3 The diagram illustrates that the connecting object is the trailer handle 3, thus the pin 21 passes through the trailer handle 3 and the trailer frame 1. More specifically, the trailer frame 1 includes a connecting part 11. The connecting part 11 includes a left wall 111 and a right wall 112 of the trailer frame arranged opposite each other, and the pin 21 passes through the left wall 111, the trailer handle 3, and the right wall 112 of the trailer frame in sequence. If the connecting object is a towing connector 4, then the pin 21 passes through the towing connector 4 and the trailer frame 1. The limiting member 22 acts as a lever and is connected to the pin 21. The limiting member 22 and the pin 21 can be integrally formed into an L-shape, or, as in this application, can be two independent parts connected to each other. The limiting member 22 is locked to the trailer frame 1 by the locking member 23. Figure 3In this configuration, the limiting member 22 is locked to the left side wall 111 of the trailer frame to constrain the pin's circumferential rotation and axial movement. It can be understood that the function of the limiting member 22 connected to the pin 21 is that, when the limiting member 22 is locked, the pin 21 will not rotate circumferentially or move axially; therefore, any connection structure that achieves this function is acceptable. The function of the locking member 23 locking to the trailer frame 1 is that the locking member 23 will not move relative to the trailer frame 1, and consequently, there will be no movement between the limiting member 22 and the pin 21. Therefore, in some embodiments, the locking member 23 can also be locked to a connected object, such as the trailer handle 3. This embodiment can be understood as... Figure 3 In the middle, the locking part 23 that is locked to the trailer frame 1 is replaced with the locking part 23 that is locked to the trailer handle 3.

[0045] In some embodiments, the pin 21 is provided with a pin slot. There may be one or two pin slots. The pin 21 passes through the pin mounting shaft and the connected object. A roughly square baffle is embedded in the slot and connected to the pin mounting seat by screws. Because the baffle is embedded in the pin slot, the pin can be constrained from circumferential rotation and axial movement. However, in the above assembly method of the pin, an additional tool is required to rotate the pin so that the pin slot aligns with the baffle, thus making operation between the connected object and the connecting shaft inconvenient.

[0046] However, in this application, the pin 21 is first threaded through the connecting object and the trailer frame 1, and then the limiting member 22 is connected to the pin 21. The limiting member 22 and the pin 21 form a lever structure. If it is necessary to adjust the positional relationship between the limiting member 22 and either the connecting object or the trailer frame 1 so that the locking member 23 can be locked, then force is applied to the end of the limiting member 22 away from the pin 21. Based on the lever action, the pin 21 is easily rotated, so that the part of the limiting member 22 that needs to be locked to either the trailer frame 1 or the connecting object... After alignment, the locking member 23 can directly lock the limiting member 22 to either the trailer frame 1 or the connecting object. As can be seen from the above process, the connection process between the connecting object and the trailer frame 1 achieved by the pin assembly 2 includes three steps: insertion, rotation of the pin 21 via the limiting member 22, and locking by the locking member 23. Therefore, the pin assembly 2 does not require additional tools and utilizes the lever principle to achieve pin rotation, making operation simple and convenient for connecting the connecting object and the trailer frame 1. Furthermore, the pin assembly 2 includes a pin 21, a limiting member 22, and a locking member 23, resulting in fewer parts, a simpler structure, and lower cost.

[0047] See Figure 3 and Figure 4The limiting member 22 includes a pin 221. Based on the structure of the limiting member 22, it can be inferred that the pin 21 includes a socket. The pin 221 is inserted into the socket in a first direction, which is perpendicular to the axial direction of the pin 21. As a variation, the pin 21 includes a through section and the pin 221. The through section is for passing through the connecting object and the trailer frame 1, and the pin 221 and the through section are L-shaped. The limiting member 22 includes a socket, and the pin 221 of the pin 21 is inserted into the socket of the limiting member 22 in the first direction. Since the pin 221 is inserted into the socket, and the locking member 23 is locked to one of the connecting object and the trailer frame 1, they are mutually fixed, thereby mutually constraining the pin 21 to rotate circumferentially and move axially.

[0048] As described above, the insertion post 221 of the limiting member 22 is perpendicular to the pin 21. The limiting member 22 and the pin 21 are connected by insertion of the insertion post 221 and the insertion hole. The connection is convenient and the pin 21 is easier to rotate. In turn, it is easier to align the limiting member 22 with the corresponding part of the trailer frame 1 and the connected object. The locking member 23 can more easily lock the limiting member 22 with one of the trailer frame 1 and the connected object.

[0049] See Figure 3 and Figure 4 ,according to Figure 4 The structure of the locking member 23 shown is unambiguous: there is only one insertion hole, located on the pin 21. The limiting member 22 includes the insertion post 221. In addition to the aforementioned insertion post 221, the locking member 23 also includes a locking head 222 connected to the insertion post 221. Based on this structure, the limiting member 22 can also be a standard part (such as a hinged bolt). The locking head 222 has a locking hole 2221. The locking member 23 passes through the locking hole 2221 and locks itself to either the connected object or the trailer frame 1.

[0050] As described above, only one insertion hole needs to be machined on the pin 21, eliminating the need for secondary surface treatment. Therefore, machining the pin 21 is low-cost and convenient. The structure of the limiting component 22 can use standard parts, further reducing costs. However, machining the pin groove is more complex than machining the insertion hole, and in some cases, it requires secondary surface treatment, all of which contribute to the high cost of machining the pin groove.

[0051] See Figure 3 The locking element 23 is a screw. Of course, considering only the locking element 23 locking to either the connected object or the trailer frame 1, the locking element 23 is not limited to a screw. For example, taking the locking element 23 and the trailer frame 1 as an example, the locking element 23 and the trailer frame 1 can be locked together by a snap-fit ​​structure.

[0052] As described above, the locking element 23 is a screw, which has a simple structure. The locking element 23 can be a standard part, thus reducing the cost of the pin assembly 2.

[0053] See Figure 9 This application discloses a trailer assembly. The trailer assembly includes a towed object 20 and any of the aforementioned trailers 10. The trailer 10 is connected to the towed object 20, and the connection method is not limited, as long as it enables the towing of the towed object 20.

[0054] See Figure 9 , Figures 11 to 13 The trailer assembly includes an auxiliary support member 30. The auxiliary support member 30 cooperates with the aforementioned trailer 10 to tow a longer object 20. For example, when the chassis drive structure of the towed object (e.g., an AGV) is differential or has a single steering wheel, the trailer 10 is used to tow the towed object; when the towed object 20 (e.g., an AGV) has at least two steering wheels, the trailer 10 and the auxiliary support member 30 cooperate to tow the towed object 20. In some embodiments, the auxiliary support member 30 and the towing connector 4 are located at opposite ends of the towed object 20; for example, the towing connector 4 is located at the front end of the towed object 20, and the auxiliary support member 30 is located at the rear end of the towed object 20. The auxiliary support member 30 is connected to the towed object 20 via a connecting component, the configuration of which is the same as that of the pin assembly 2; that is, the connecting component is the pin assembly 2.

[0055] In some embodiments, the auxiliary support 30 is locked to the towed object 20 by screws 40. More specifically, the auxiliary support 30 includes a support body 301 and a support wheel 302. The support wheel 302 is connected to the support body 301, and the screws 40 pass through the support body 301 to lock it to the towed object 20.

[0056] As described above, the auxiliary support 30 is connected to the dragged object 20 by screws 40. The auxiliary support 30 and the dragged object 20 are not easy to come loose, which can better drag the dragged object 20.

[0057] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A trailer, characterized in that, The device includes a trailer frame and a towing connector. The trailer frame includes opposing trailer frame sides, and each trailer frame side is provided with a towing connector. Each towing connector is used to connect to the object side of the object being towed.

2. The trailer according to claim 1, characterized in that, The trailer includes a tipping frame, which is connected to the trailer frame via a lever structure. When the tipping frame is in its initial position, each of the towing connectors is held in place by the tipping frame under the action of the lever.

3. The trailer according to claim 1, characterized in that, The towing connector includes a towing connection part; the trailer includes a connecting shaft, which is used to connect with a pre-reserved docking structure on the side of the object and is also located in the towing connection part.

4. The trailer according to claim 1, characterized in that, At least part of the drag connector includes a drag connector and a telescopic structure, the telescopic structure being connected to the drag connector, and the drag connector extending or retracting under the action of the telescopic structure; And / or, the trailer frame includes a trailer handle, the trailer frame includes opposing trailer frame sides and a connecting portion located between the trailer frame sides, the connecting portion being connected to the trailer handle; the trailer frame sides and the connecting portion form an opening for the towed object to enter.

5. The trailer according to claim 1, characterized in that, The trailer includes connection objects and pin assemblies corresponding to each connection object, and each connection object is connected to the trailer frame through each pin assembly. The pin assembly includes a pin, a limiting member, and a locking member. The pin passes through the connected object and the trailer frame. The limiting member acts as a lever and is connected to the pin. The limiting member is locked by the locking member to one of the connected object and the trailer frame to constrain the pin's circumferential rotation and axial movement.

6. The trailer according to claim 5, characterized in that, One of the pin and the limiting member includes a socket and the other includes a post. The post is inserted into the socket in a first direction, which is perpendicular to the axial direction of the pin. And / or, the connection object includes at least one of the towing connector and the trailer handle of the trailer.

7. The trailer according to claim 6, characterized in that, There is only one insertion hole, which is located on the pin, and the limiting member includes the insertion post.

8. The trailer according to claim 5, characterized in that, The locking element is a screw.

9. A trailer assembly, characterized in that, The trailer assembly includes a towed object and a trailer as described in any one of claims 1 to 8, wherein the towed object is connected to the trailer.

10. The trailer assembly according to claim 9, characterized in that, The trailer assembly includes an auxiliary support member, which is connected to the towed object via a connecting component. The connecting component has the same configuration as the pin assembly. Alternatively, the auxiliary support member can be locked to the dragged object by screws; Alternatively, the towed object is an AGV vehicle.

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