Tray

By designing a pallet with a rotatable main wheel frame and a secondary wheel frame structure, the problems of low adaptability and large vibration of the vehicle platform on ground with different heights were solved, achieving smooth movement and reducing noise.

CN224016920UActive Publication Date: 2026-03-20CIMC AIOT TECH CO LTD +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-28
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

The existing vehicle platform has low adaptability when facing ground with height differences, and shakes significantly when going over bumps and gaps.

Method used

A pallet was designed, including a main body and a traveling mechanism. The main body is a plate-shaped structure, and the traveling mechanism includes a main wheel frame, a secondary wheel frame, and traveling rollers. The main wheel frame and the secondary wheel frame can rotate, and the traveling rollers can rotate relative to the secondary wheel frame. The angle can be changed by rotating the main wheel frame and the secondary wheel frame to adapt to height differences and cross obstacles and gaps.

Benefits of technology

It improves the pallet's adaptability when facing ground with height differences and crossing bumps and gaps, and reduces shaking and noise during movement.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224016920U_ABST
    Figure CN224016920U_ABST
Patent Text Reader

Abstract

The utility model provides a pallet which comprises a main body and a walking mechanism, the main body is used for placing goods or vehicles, and the walking mechanism is arranged at the bottom of the main body. The walking mechanism at least comprises a main wheel carrier, two auxiliary wheel carriers and four walking rollers, the main wheel carrier is connected to the bottom of the main body and can rotate around the axis in the transverse direction, the length direction of the main wheel carrier extends in the longitudinal direction of the main body, the two auxiliary wheel carriers are arranged at the two ends of the length direction of the main wheel carrier respectively, and the two auxiliary wheel carriers can rotate on the main wheel carrier. The four walking rollers are connected to the ends, in the length direction, of the two auxiliary wheel carriers correspondingly and rotate around the axis, in the transverse direction, of the main body relative to the auxiliary wheel carriers. Due to the rotation of the main wheel carrier and the auxiliary wheel carrier, the walking rollers are driven to rotate, so that the walking mechanism can stably pass through the ground or road surfaces such as ridges and seams with height difference, the adaptability of the tray to the ground height difference during walking is improved, the shaking of the tray in the moving process is reduced, and the noise in the tray moving process is reduced.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a transfer equipment technical field, especially a tray. BACKGROUND

[0002] The vehicle carrying tray (i.e. vehicle carrying plate) is a commonly used vehicle moving device in the stereo garage, which can help the vehicle to move to the corresponding parking space.

[0003] The existing vehicle carrying plate and its horizontal movement mainly have two structural modes: 1. The vehicle carrying plate itself does not have a power device, and the vehicle carrying plate is driven by the external driving platform to realize translation, and the vehicle carrying plate can be equipped with a roller or the external driving platform is provided with a roller; 2. The vehicle carrying plate itself is provided with a driving device, and the driving device drives the walking roller mounted on the vehicle carrying plate to rotate to realize the translation of the vehicle carrying plate.

[0004] However, the single and multiple rollers in the prior art are fixedly installed on the vehicle carrying plate, so that the adaptability of the vehicle carrying plate to the ground with height difference is low, and the vehicle body shakes greatly when passing through the gap. INVENTION CONTENTS

[0005] The utility model discloses a tray, which can adapt to the ground with height difference and reduce the shaking of the vehicle body when passing through the gap.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] According to one aspect of the utility model, the utility model provides a tray for transferring goods, which comprises: a main body provided as a plate structure, and the top of the main body is used for placing the goods; a walking mechanism arranged at the bottom of the main body to enable the main body to move through the walking mechanism; wherein the walking mechanism comprises a main wheel frame, a sub-wheel frame and walking rollers; the main wheel frame is connected at the bottom of the main body; the length direction of the main wheel frame extends along the longitudinal direction of the main body and can rotate around the axis in the transverse direction of the main body; the sub-wheel frame is provided with at least two, and the two sub-wheel frames are respectively connected at both ends of the length direction of the main wheel frame; the length direction of the sub-wheel frame extends along the longitudinal direction of the main body and can rotate around the axis in the transverse direction of the main body relative to the main wheel frame; the walking roller is provided with at least four, and the four walking rollers are respectively connected at the end of the length direction of the two sub-wheel frames; the walking roller can rotate relative to the sub-wheel frame.

[0008] In one embodiment of the present application, the tray further comprises a king pin; the king pin is connected to the bottom of the main body and can rotate relative to the main body; the king pin extends in the transverse direction of the main body; the king wheel frame is connected to the bottom of the main body through the king pin, and the king pin is provided with the running mechanism at both ends in the axial direction.

[0009] In one embodiment of the present application, the king pin is provided with a plurality of king pins; the plurality of king pins are distributed at intervals on the bottom of the main body, and each king pin is provided with the running mechanism at both ends in the axial direction.

[0010] In one embodiment of the present application, the tray further comprises a king pin sleeve; the king pin is connected to the bottom of the main body through the king pin sleeve, so that the king pin can rotate relative to the main body.

[0011] In one embodiment of the present application, the tray further comprises a king pin sleeve; the king pin is connected to the bottom of the main body through the king pin sleeve, so that the king pin can rotate relative to the main body.

[0012] In one embodiment of the present application, the running mechanism is provided with a plurality of running mechanisms; the plurality of running mechanisms are arranged at intervals on the bottom of the main body.

[0013] In one embodiment of the present application, the tray further comprises a guide mechanism; the guide mechanism is fixed to the bottom of the main body; the guide mechanism comprises a guide wheel and a connecting piece; the guide wheel is connected to the bottom of the main body through the connecting piece, and the guide wheel can rotate relative to the main body; the guide wheel extends vertically in the axial direction, and at least part of the guide wheel exceeds the side wall of the running mechanism in the width direction of the main body, so as to guide the movement of the main body.

[0014] In one embodiment of the present application, the guide mechanism is provided with a plurality of guide mechanisms, and the plurality of guide mechanisms are arranged on the bottom of the main body.

[0015] In one embodiment of the present application, the guide mechanism comprises two guide wheels and two connecting pieces; the two guide wheels are connected to the main body through the two connecting pieces respectively, and the two guide wheels are arranged flush in the width direction of the main body.

[0016] In one embodiment of the present application, the main body comprises a top plate and two bottom beams; the two bottom beams are arranged at intervals in the transverse direction of the main body, and the top plate is connected to the top of the two bottom beams.

[0017] From the above technical solution, the present application at least has the following advantages and positive effects:

[0018] In this invention, the pallet includes a main body and a traveling mechanism. The main body is a plate-like structure, with its top capable of holding goods or vehicles. The traveling mechanism is located at the bottom of the main body, allowing the main body to move and thus move the goods or vehicles. The traveling mechanism includes at least a main wheel frame, two auxiliary wheel frames, and four traveling rollers. The main wheel frame is connected to the bottom of the main body and can rotate about its lateral axis. The length of the main wheel frame extends longitudinally along the main body. The two auxiliary wheel frames are located at opposite ends of the main wheel frame's length, and both auxiliary wheel frames can rotate relative to the main wheel frame about its lateral axis. The four traveling rollers are connected to the ends of the two auxiliary wheel frames' lengths, and all four traveling rollers can rotate relative to the auxiliary wheel frames about their lateral axes. Therefore, when the traveling mechanism encounters ground with height differences or crosses bumps and gaps, the rotation of the main wheel frame and the auxiliary wheel frame drives the traveling rollers to rotate. By changing the relative angle between the main wheel frame and the auxiliary wheel frame, the traveling mechanism can smoothly cross ground with height differences or crosses and gaps, thereby improving the pallet's adaptability to ground height differences and its ability to cross bumps and gaps. It also reduces vibration during pallet movement to a certain extent, thus reducing noise during pallet movement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the bottom of the tray according to an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 A partial schematic diagram of the tray.

[0021] Figure 3 yes Figure 1 Side view of the tray.

[0022] Figure 4 yes Figure 1 A schematic diagram of the pallet's traveling mechanism.

[0023] Figure 5 yes Figure 1 Front view of the tray.

[0024] Figure 6 yes Figure 1 A partial cross-sectional view of the tray.

[0025] The annotations in the attached figures are explained as follows:

[0026] 10-Main body; 11-Top plate; 12-Bottom beam; 13-Reinforcing beam; 20-Traveling mechanism; 21-Main wheel frame; 22-Secondary wheel frame; 23-Traveling roller; 31-Main pin; 32-Main shaft sleeve; 33-Secondary pin; 40-Guiding mechanism; 41-Guiding wheel; 42-Connecting part. DETAILED DESCRIPTION

[0027] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be varied in a wide range of embodiments, none of which depart from the scope of the present application, and that the description and drawings are to be considered as illustrative in nature, and not as restrictive to the present application.

[0028] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of direction or positional relationship (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the positions of these elements change, the indications of direction will also change accordingly.

[0029] In addition, the terms "first" and "second" are only for descriptive purposes and should not be understood as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] The existing vehicle carrying plate and its horizontal movement mainly have two structural ways: 1. The vehicle carrying plate itself does not have a power device, and the vehicle carrying plate is driven by an external driving platform to realize horizontal movement, and the vehicle carrying plate can be provided with a roller or the external driving platform is provided with a roller; 2. The vehicle carrying plate itself is provided with a driving device, and the driving device drives the walking roller mounted on the vehicle carrying plate to rotate to realize the horizontal movement of the vehicle carrying plate.

[0031] However, the single and multiple rollers in the prior art are fixedly installed on the vehicle carrying plate, so that the adaptability of the vehicle carrying plate to the ground with height difference is low, and the shaking is large when passing through the gap. Therefore, a tray is proposed to solve the above problems.

[0032] The scheme is further illustrated by the following embodiments:

[0033] Figure 1 is a schematic view of the bottom of the tray of the embodiment of the present application. Figure 2 is Figure 1 is a partial schematic view of the tray of Figure 1 The left-right direction of Figure 1 The up-down direction of

[0034] Please refer toFigure 1 and Figure 2 The tray of the embodiment can be used for transferring goods and transferring vehicles. In actual use, the tray can be used as a load plate and applied to a stereo garage for transferring vehicles.

[0035] In the embodiment, the tray can include a main body 10 and a traveling mechanism 20, and the traveling mechanism 20 is arranged at the bottom of the main body 10, so that the main body 10 can move through the traveling mechanism 20.

[0036] Specifically, the main body 10 can be arranged in a plate structure, that is, the top of the main body 10 is arranged as a plane, so that the top of the main body 10 can be used for placing goods or vehicles.

[0037] The main body 10 can include a top plate 11 and two bottom beams 12. The two bottom beams 12 are arranged in a transverse direction of the main body 10, and the top plate 11 is connected to the top of the two bottom beams 12, so that the bottom beams 12 can support the top plate 11 and ensure the structural strength of the main body 10 as a whole.

[0038] It should be noted that the main body 10 can also include a plurality of reinforcing beams 13, and the plurality of reinforcing beams 13 are connected to the bottom of the top plate 11 and can be connected to the bottom beams 12, thereby enhancing the structural strength of the main body 10 as a whole.

[0039] Figure 3 is a side view of the tray of Figure 1 Figure 4 is a schematic view of the traveling mechanism of the tray of Figure 1

[0040] Referring to Figure 1 , Figure 2 and Figure 3 The traveling mechanism 20 is installed on the bottom beams 12, so that the traveling mechanism 20 can support the main body 10 and improve the connection strength between the traveling mechanism 20 and the main body 10.

[0041] Specifically, the traveling mechanism 20 can include a main wheel frame 21, a sub-wheel frame 22 and a traveling roller 23.

[0042] The main wheel frame 21 is connected to the bottom of the main body 10, and the length direction of the main wheel frame 21 extends in the longitudinal direction of the main body 10 and can rotate around the axis in the transverse direction of the main body 10. That is, the middle part of the length direction of the main wheel frame 21 is connected to the bottom beams 12, and the main wheel frame 21 can rotate around the axis in the transverse direction, so that the end part of the length direction of the main wheel frame 21 can swing away from or close to the bottom beams 12.

[0043] ​​Meanwhile, the auxiliary wheel frame 22 is provided with at least two, and the two auxiliary wheel frames 22 are connected at the two ends of the main wheel frame 21 in the length direction, so that the main wheel frame 21 can drive the auxiliary wheel frame 22 to move away from or close to the bottom beam 12 when rotating. It should be noted that when the auxiliary wheel frame 22 is provided with more than two, the plurality of auxiliary wheel frames 22 are arranged side by side along the length direction of the main wheel frame 21 and located on both sides of the rotation center, so that the main wheel frame 21 can drive the auxiliary wheel frame 22 to move away from or close to the bottom beam 12 when rotating.

[0044] In addition, the length direction of the auxiliary wheel frame 22 extends along the longitudinal direction of the main body 10 and can rotate relative to the main wheel frame 21 about the axis in the transverse direction of the main body 10, that is, the end of the length direction of the auxiliary wheel frame 22 can move away from or close to the main body 10.

[0045] It should be noted that the auxiliary wheel frame 22 can be connected to the main wheel frame 21 through an auxiliary pin shaft 33. Specifically, the auxiliary pin shaft 33 is fixedly connected to the main wheel frame 21, the auxiliary pin shaft 33 is used to connect the auxiliary wheel frame 22, and the auxiliary wheel frame 22 can rotate relative to the auxiliary pin shaft 33, so that the auxiliary wheel frame 22 can rotate relative to the main wheel frame 21. In addition, the auxiliary wheel frame 22 and the auxiliary pin shaft 33 can be connected through a shaft sleeve or a bearing, so that the auxiliary wheel frame 22 can rotate relative to the auxiliary pin shaft 33.

[0046] In this embodiment, the main wheel frame 21 can rotate relative to the main body 10 within a certain range. Similarly, the auxiliary wheel frame 22 also rotates relative to the main wheel frame 21 only within a certain range, so as to avoid the main wheel frame 21 or the auxiliary wheel frame 22 from being overturned.

[0047] Meanwhile, the walking roller 23 is provided with at least four, and the four walking rollers 23 are connected at the ends of the length direction of the two auxiliary wheel frames 22, respectively, so that the auxiliary wheel frame 22 can drive the walking roller 23 to move away from or close to the main body 10 when the auxiliary wheel frame 22 rotates relative to the main wheel frame 21.

[0048] In addition, the walking roller 23 can rotate relative to the auxiliary wheel frame 22. Specifically, the walking roller 23 is connected to the auxiliary wheel frame 22 through a bearing, so as to reduce the friction between the walking roller 23 and the auxiliary wheel frame 22 and ensure the smooth walking of the walking roller 23.

[0049] As Figure 4As shown, during the movement of the main body 10 from right to left via the walking mechanism 20, when encountering ground with height differences or sloping ground, the left-side walking roller 23 on the left auxiliary wheel frame 22 begins to roll along the sloping surface. That is, when climbing a slope, the walking roller 23 drives the auxiliary wheel frame 22 to rotate relative to the main wheel frame 21 until the two walking rollers 23 on the left auxiliary wheel frame 22 can be in contact with the sloping ground. During this process, the main wheel frame 21 also rotates relative to the main body 10 under the drive of the left auxiliary wheel frame 22, thereby causing the left end of the main wheel frame 21 to rise upward. However, since the two walking rollers 23 on the right auxiliary wheel frame 22 always remain in contact with the flat ground, the center of gravity of the main wheel frame 21 rises steadily during the rotation of the main wheel frame 21, causing the part of the main body 10 located above the walking mechanism 20 to rise steadily, thus allowing the pallet to smoothly cross ground with height differences. Similarly, when the walking mechanism 20 crosses bumps or gaps, its operating principle is similar to that when it crosses ground with height differences, so it will not be described in detail here.

[0050] In this embodiment, multiple walking mechanisms 20 may be provided, and the multiple walking mechanisms 20 are spaced apart at the bottom of the main body 10. Specifically, the multiple walking mechanisms 20 are spaced apart at the four corners of the bottom of the main body 10, so that the multiple walking mechanisms 20 can stably support the main body 10.

[0051] Figure 5 yes Figure 1 Front view of the tray.

[0052] See Figure 2 and Figure 5 The pallet may also include a main pin 31 and a main pin sleeve 32.

[0053] Specifically, the main pin 31 is connected to the bottom of the main body 10 through the main shaft sleeve 32, so that the main pin 31 can rotate relative to the main body 10.

[0054] It should be noted that the main pin 31 can be directly connected to the bottom of the main body 10 through a hole-shaft fit, allowing the main pin 31 to rotate relative to the main body 10. Of course, the main pin 31 can also be connected to the bottom of the main body 10 through bearings, thereby allowing the main pin 31 to rotate relative to the main body 10.

[0055] In this embodiment, the axial direction of the main pin 31 extends laterally along the main body 10. The main wheel frame 21 is connected to the bottom of the main body 10 through the main pin 31. Both ends of the main pin 31 are provided with a traveling mechanism 20. That is, the two ends of the main pin 31 are fixed with the traveling mechanism 20, and the main wheel frame 21 on the traveling mechanism 20 is fixedly connected to the end of the main pin 31, so that the main wheel frame 21 can rotate with the main pin 31 and rotate relative to the main body 10.

[0056] Referring to Figure 1 and Figure 2 , the kingpin 31 is provided in plurality, and the plurality of kingpins 31 are distributed at intervals on the bottom of the main body 10, and both ends of each kingpin 31 in the axial direction are provided with the walking mechanism 20.

[0057] Specifically, in the present embodiment, the kingpin 31 is provided in four, and the four kingpins 31 are distributed at intervals on the four corners of the bottom of the main body 10, and two walking mechanisms 20 are connected to each kingpin 31, so that two walking mechanisms 20 are provided on each of the four corners of the bottom of the main body 10, so that the main body 10 can be moved stably by the plurality of walking mechanisms 20, and the carrying capacity of the tray is improved.

[0058] Figure 6 is Figure 1 a partial sectional view of the tray.

[0059] Referring to Figure 1 , Figure 2 and Figure 6 , the tray can further include a guide mechanism 40.

[0060] The guide mechanism 40 is fixed on the bottom of the main body 10, and the guide mechanism 40 includes a guide wheel 41 and a connecting piece 42, the guide wheel 41 is connected to the bottom of the main body 10 through the connecting piece 42, and the guide wheel 41 can rotate relative to the main body 10. The guide wheel 41 extends vertically in the axial direction, and in the width direction of the main body 10, the guide wheel 41 at least partially exceeds the side wall of the walking mechanism 20, so as to be matched with the walking track and guide the movement of the main body 10, and the guide wheel 41 can protect the walking mechanism 20 to prevent the walking mechanism 20 from colliding with obstacles.

[0061] In the present embodiment, the guide mechanism 40 is provided in plurality, and the plurality of guide mechanisms 40 are arranged on the bottom of the main body 10. At the same time, the guide mechanism 40 and the walking mechanism 20 are arranged side by side in the longitudinal direction, and the guide mechanism 40 is located on the side of the walking mechanism 20 away from the center of the main body 10, so that the guide mechanism 40 can not only guide the walking of the tray by cooperating with structures such as the walking track, but also protect the walking mechanism 20 from colliding with the walking track and the like.

[0062] Referring to Figure 2 and Figure 6 , the guide mechanism 40 can include two guide wheels 41 and two connecting pieces 42; the two guide wheels 41 are connected to the main body 10 through the two connecting pieces 42 respectively, and in the width direction of the main body 10, the two guide wheels 41 are flush and symmetrically arranged, so that the two guide wheels 41 exceed the side surface of the two walking mechanisms 20 in the transverse direction, thereby protecting the walking mechanism 20.

[0063] In addition, in the embodiment, the tray can be towed by an external towing device to move the tray, of course, the tray can also be driven to move by itself by setting a driving device at the bottom of the main body 10.

[0064] In summary, the tray comprises a main body 10 and a walking mechanism 20, the main body 10 is a plate-shaped structure, the top of which can be used to place goods or vehicles, and the walking mechanism 20 is arranged at the bottom of the main body 10 to enable the main body 10 to move through the walking mechanism 20, thereby moving the goods or vehicles. At the same time, the walking mechanism 20 at least comprises a main wheel frame 21, two pairs of wheel frames 22 and four walking rollers 23, the main wheel frame 21 is connected at the bottom of the main body 10 and can rotate around the axis in the transverse direction of the main body 10, the length direction of the main wheel frame 21 extends along the longitudinal direction of the main body 10, and the two pairs of wheel frames 22 are arranged at both ends of the length direction of the main wheel frame 21 respectively, and both of the two pairs of wheel frames 22 can rotate around the axis in the transverse direction of the main body 10 relative to the main wheel frame 21. The four walking rollers 23 are connected at the end of the length direction of the two pairs of wheel frames 22 respectively, and the four walking rollers 23 can rotate around the axis in the transverse direction of the main body 10 relative to the wheel frames 22. Therefore, when the walking mechanism 20 encounters a ground with height difference or a gap, by rotating the main wheel frame 21 and the wheel frames 22 and driving the walking rollers 23 to rotate, the walking mechanism 20 can smoothly pass through the ground with height difference or the gap and the like road surface by changing the angle of the main wheel frame 21 and the wheel frames 22 relative to the main body 10, thereby improving the adaptability of the tray to the height difference of the walking ground and the ability of the tray to pass through the gap, and to a certain extent, reducing the shaking of the tray during movement, thereby reducing noise.

[0065] Although the present application has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive terms. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it is understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be interpreted broadly within the spirit and scope of the appended claims, and therefore all changes and modifications that fall within the scope of the claims or equivalents thereof are intended to be embraced by the appended claims.

Claims

1. A pallet for transferring goods, characterized in that, The tray includes: The main body is configured as a plate-like structure, and the top of the main body is used to place the goods; A walking mechanism is provided at the bottom of the main body so that the main body can move by means of the walking mechanism; The walking mechanism includes a main wheel frame, a secondary wheel frame, and walking rollers. The main wheel frame is connected to the bottom of the main body. The length of the main wheel frame extends longitudinally along the main body and is rotatable about the transverse axis of the main body. At least two secondary wheel frames are provided, and the two secondary wheel frames are respectively connected to the two ends of the main wheel frame in the length direction. The length of the secondary wheel frame extends longitudinally along the main body and is rotatable about the transverse axis of the main body relative to the main wheel frame. At least four walking rollers are provided, and the four walking rollers are respectively connected to the ends of the two secondary wheel frames in the length direction. The walking rollers are rotatable relative to the secondary wheel frames.

2. The pallet according to claim 1, characterized in that, It also includes a main pin; the main pin is connected to the bottom of the main body and is rotatable relative to the main body; the axial direction of the main pin extends laterally along the main body; the main wheel frame is connected to the bottom of the main body through the main pin, and the walking mechanism is provided at both ends of the main pin in the axial direction.

3. The pallet according to claim 2, characterized in that, Multiple main pins are provided; the multiple main pins are spaced apart at the bottom of the main body, and each main pin is provided with a traveling mechanism at both ends in the axial direction.

4. The tray according to claim 2, characterized in that, It also includes a main shaft sleeve; the main pin is connected to the bottom of the main body through the main shaft sleeve so that the main pin can rotate relative to the main body.

5. The pallet according to claim 1, characterized in that, It also includes a secondary pin; the secondary pin is fixedly connected to the main wheel frame; the secondary pin is used to connect the secondary wheel frame, and the secondary wheel frame can rotate relative to the secondary pin.

6. The pallet according to claim 1, characterized in that, Multiple walking mechanisms are provided; the multiple walking mechanisms are spaced apart at the bottom of the main body.

7. The tray according to claim 1, characterized in that, It also includes a guiding mechanism; the guiding mechanism is fixed to the bottom of the main body; the guiding mechanism includes a guide wheel and a connector; the guide wheel is connected to the bottom of the main body through the connector, and the guide wheel is rotatable relative to the main body; the guide wheel extends vertically in the axial direction, and in the width direction of the main body, the guide wheel at least partially extends beyond the side wall of the walking mechanism to guide the movement of the main body.

8. The tray according to claim 7, characterized in that, Multiple guide mechanisms are provided, and the multiple guide mechanisms are located at the bottom of the main body.

9. The tray according to claim 7, characterized in that, The guiding mechanism includes two guide wheels and two connecting members; the two guide wheels are respectively connected to the main body through the two connecting members, and the two guide wheels are arranged flush with each other in the width direction of the main body.

10. The tray according to claim 1, characterized in that, The main body includes a top plate and two bottom beams; the two bottom beams are arranged laterally along the main body, and the top plate is connected to the top of the two bottom beams.