Tray type four-way vehicle

Abstract

The tray type four-way vehicle comprises a vehicle body, a first lifting assembly and a tray piece, the first lifting assembly comprises at least two first rotating cylinders, at least one first linkage rod set, at least two first lifting pieces and a first driving piece, and the first rotating cylinders and the first linkage rod set are rotationally arranged on the vehicle body; the at least two first lifting parts penetrate through the at least two first rotating cylinders respectively and are in threaded connection with the at least two first rotating cylinders respectively, the first rotating cylinders are sleeved with first gear parts, the two ends of the first linkage rod set are meshed with the two corresponding first gear parts, and the first driving part is arranged on the vehicle body. The first driving piece is connected with one of the first linkage rod sets, and the tray piece is connected with the first lifting piece and located above the trolley body.

Description

Technical Field

[0001] The invention relates to the technical field of logistics equipment, and in particular to a pallet-type four-way vehicle. Background Art

[0002] A pallet-type four-way cart is suitable for high-density storage and fast access scenarios. It can lift goods on warehouse shelves and unload them after moving them to preset positions in the front-back and left-right directions to complete the handling of goods. Among them, the lifting component is a key component of the pallet-type four-way cart to lift or unload goods. The lifting component on the existing pallet-type four-way cart includes a pallet part, four lifting parts and four driving parts. The four driving parts drive the four lifting parts to rise and fall respectively, so as to drive the pallet part connected to the lifting parts to rise and fall to complete the lifting or unloading of goods. However, the inventor found in actual production and use that the above-mentioned existing pallet-type four-way cart has the following problems: 1. The number of driving parts is large, and the production cost of the pallet-type four-way cart is relatively large; 2. The four driving parts drive the four lifting parts to rise and fall respectively, which easily leads to the problem of uneven tilting of the pallet parts. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tray-type four-way vehicle.

[0004] According to an embodiment of the present invention, a pallet-type four-way vehicle comprises a vehicle body, a first lifting component and a pallet component, wherein the first upgrading component comprises at least two first rotating cylinders, at least one first linkage rod group, at least two first lifting components and a first driving component, wherein the first rotating cylinder and the first linkage rod group are both rotatably arranged on the vehicle body, at least two first lifting components are respectively penetrated through the at least two first rotating cylinders and are respectively threadedly connected with the at least two first rotating cylinders, the first rotating cylinder is sleeved with a first gear component, the two ends of the first linkage rod group are meshed with the corresponding two first gear components, the first driving component is arranged on the vehicle body, the first driving component is connected to one of the first linkage rod groups, the pallet component is connected to the first lifting component and is located above the vehicle body, wherein the first driving component can drive one of the first linkage rod groups to rotate, so as to drive all the first rotating cylinders to rotate synchronously through the first gear component and the first linkage rod group, so that all the first lifting components are lifted and lowered synchronously, thereby driving the pallet component to lift and lower.

[0005] A pallet-type four-way vehicle according to an embodiment of the present invention has at least the following features:

[0006] Beneficial effects:

[0007] Through the above structure, the first driving member can drive one of the first linkage rod groups to rotate, so as to drive all the first rotating cylinders to rotate synchronously through the first gear member and the first linkage rod group, so that all the first lifting members are lifted and lowered synchronously to drive the pallet member to lift and lower. It can be seen that, on the one hand, the pallet-type four-way vehicle of the present application can drive the pallet member to lift and lower only through a first driving member, so compared with the traditional pallet-type four-way vehicle, its production cost can be reduced. On the other hand, all the first lifting members are lifted and lowered synchronously to drive the pallet member to lift and lower, which can reduce the probability of the pallet member being tilted and uneven.

[0008] According to some embodiments of the present invention, at least two first rotating wheels are rotatably connected to the front and rear sides of the vehicle body, the vehicle body is provided with a second lifting assembly, the second lifting assembly is connected to two rotating wheel frames, one of the rotating wheel frames is rotatably connected to at least two second rotating wheels located on the left side of the vehicle body, and the other rotating wheel frame is rotatably connected to at least two second rotating wheels located on the right side of the vehicle body, the vehicle body is provided with a second driving member, at least one of the first rotating wheels and at least one of the second rotating wheels are connected to the second driving member, wherein the second lifting assembly drives the two rotating wheel frames to rise synchronously so that all the second rotating wheels are separated from the ground, and after all the first rotating wheels are in contact with the ground, the second driving member can synchronously drive at least one of the first rotating wheels and at least one of the second rotating wheels to rotate, so that the vehicle body moves left or right under the drive of the corresponding first rotating wheels, and the second lifting assembly drives the two rotating wheel frames to descend synchronously so that all the first rotating wheels are separated from the ground, and after all the second rotating wheels are in contact with the ground, the second driving member can synchronously drive at least one of the first rotating wheels and at least one of the second rotating wheels to rotate, so that the vehicle body moves forward or backward under the drive of the corresponding second rotating wheels.

[0009] According to some embodiments of the present invention, at least two of the first rotating wheels located on the same side are connected via a gear assembly, the vehicle body is rotatably connected to a first rod, two ends of the first rod are respectively connected to two of the gear assemblies, and the first rod is connected to the second driving member, wherein the second driving member can drive the first rod to rotate so as to synchronously drive all of the first rotating wheels to rotate through the two gear assemblies.

[0010] According to some embodiments of the present invention, one of the second rotating wheels located on the left side and one of the second rotating wheels located on the right side are both provided with a second rod, the vehicle body is rotatably connected to a third rod, both ends of the third rod are respectively connected to the two second rods through universal couplings, and the second driving member is connected to the third rod, wherein the second driving member can drive the third rod to rotate, so as to drive the two second rods to rotate through the two universal couplings, so that the corresponding two second rotating wheels rotate.

[0011] According to some embodiments of the present invention, at least two third rotating wheels are rotatably connected to both the front and rear sides of the vehicle body, and the third rotating wheels and the first rotating wheels can abut against the ground together.

[0012] According to some embodiments of the present invention, the vehicle body is provided with a first installation cavity and two second installation cavities, the two second installation cavities are respectively arranged on the left and right sides of the first installation cavity, the first rotating cylinder, the first linkage rod group, the first driving member and the second driving member are all arranged in the first installation cavity, the two rotating wheel frames are respectively arranged in the two second installation cavities, a part of the second lifting assembly is arranged in the first installation cavity, and the other part is arranged in the second installation cavity.

[0013] According to some embodiments of the present invention, the first installation cavity is provided with an electric control module, and the first driving member, the second driving member and the second lifting assembly are all electrically connected to the electric control module.

[0014] According to some embodiments of the present invention, the number of the first rotating cylinders and the number of the first lifting members are both four, the number of the first linkage rod groups is three, the four first rotating cylinders are distributed at the four corners of a rectangle, the four first rotating cylinders and the three first linkage rod groups jointly surround a receiving space, and the first driving member is arranged in the receiving space.

[0015] According to some embodiments of the present invention, the first linkage rod group includes a fourth rod, a fifth rod, a sixth rod, a first sleeve and a second sleeve, one end of the fourth rod and one end of the sixth rod are rotatably provided on the vehicle body, and are respectively engaged with the corresponding two first gear members, the other end of the fourth rod and one end of the fifth rod are respectively passed through the two ends of the first sleeve through a spline connection, the other end of the sixth rod and the other end of the fifth rod are respectively passed through the two ends of the second sleeve through a spline connection, and one of the fifth rods is connected to the first driving member.

[0016] According to some embodiments of the present invention, the first sleeve and the second sleeve are respectively provided with a first fastener and a second fastener, the first fastener abuts against the other end of the fourth rod or one end of the fifth rod, and the second fastener abuts against the other end of the sixth rod or the other end of the fifth rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1It is a structural diagram of an embodiment of a tray-type four-way vehicle of the present invention;

[0019] Figure 2 for Figure 1 A partial exploded view of a pallet-type four-way vehicle shown in;

[0020] Figure 3 for Figure 1 The structure diagram of the pallet-type four-way vehicle after removing some parts;

[0021] Figure 4 for Figure 1 A cross-sectional view of a pallet-type four-way vehicle with some parts removed;

[0022] Figure 5 for Figure 4 A partial enlarged view of part A shown in FIG.

[0023] Figure 6 for Figure 3 A cross-sectional view of the first rotating cylinder, part of the first linkage rod group and the first lifting member shown in FIG.

[0024] Figure 7 for Figure 3 A partial exploded view of the first linkage rod group is shown in FIG.

[0025] Reference numerals:

[0026] Vehicle body 100, first installation cavity 110, second installation cavity 120, guide groove 121, guide rod 122;

[0027] The first lifting assembly 200, the first rotating cylinder 210, the first gear member 211, the first linkage rod group 220, the fourth rod member 221, the fifth rod member 222, the sixth rod member 223, the first sleeve 224, the second sleeve 225, the first lifting member 230, and the first driving member 240;

[0028] Pallet element 300;

[0029] A first rotating wheel 410, a second rotating wheel 420, a second driving member 430, a gear assembly 440, and a third rotating wheel 450;

[0030] A second lifting assembly 500, a second rotating cylinder 510, a second gear member 511, a second linkage rod group 520, a second lifting member 530, and a third driving member 540;

[0031] Rotating wheel frame 600, guide block 610, guide cylinder 620;

[0032] A first rod 710, a third rod 720, a universal coupling 730, and an electric control module 740;

[0033] Accommodation space S. DETAILED DESCRIPTION

[0034] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0035] In the description of the present invention, if there is a description of first, second, third, fourth, fifth, etc., it is only for the purpose of distinguishing the technical features, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0038] Reference Figures 1 to 7 An embodiment of the present invention provides a pallet-type four-way vehicle, which includes a vehicle body 100 , a first lifting assembly 200 and a pallet component 300 .

[0039] The first lifting assembly 200 includes four first rotating cylinders 210, three first linkage rod groups 220, four first lifting members 230, and a first driving member 240. The first rotating cylinders 210 and the first linkage rod groups 220 are rotatably provided on the vehicle body 100. The four first lifting members 230 are respectively inserted through the four first rotating cylinders 210 and are respectively threadedly connected to the four first rotating cylinders 210. A first gear member 211 is sleeved on the first rotating cylinder 210. Two ends of the first linkage rod group 220 are engaged with the corresponding two first gear members 211. The first driving member 240 is provided on the vehicle body 100, and the first driving member 240 is connected to one of the first linkage rod groups 220. The tray member 300 is connected to the first lifting member 230 and is located above the vehicle body 100. Among them, the first driving member 240 can drive one of the first linkage rod groups 220 to rotate, so as to drive all the first rotating cylinders 210 to rotate synchronously through the first gear members 211 and the first linkage rod groups 220, and make all the first lifting members 230 lift and lower synchronously, so as to drive the tray member 300 to lift and lower.

[0040] It can be understood that two ends of the first linkage rod group 220 are engaged with the corresponding two first gear members 211. Specifically, referring to Figure 3 , the four first gear members 211 are respectively named the first gear member, the second gear member, the third gear member, and the fourth gear member, and the three first linkage rod groups 220 are respectively named the first rod group, the second rod group, and the third rod group. Two ends of the first rod group are respectively engaged with the first gear member and the second gear member. Two ends of the second rod group are respectively engaged with the second gear member and the third gear member. Two ends of the third rod group are respectively engaged with the third gear member and the fourth gear member. Among them, (the four first rotating cylinders 210 and the three first linkage rod groups 220 together form a U-shaped structure) the four first rotating cylinders 210 and the three first linkage rod groups 220 together enclose a receiving space S, and the first driving member 240 is provided in the receiving space S to improve the structural compactness of the vehicle body 100.

[0041] It can be understood that on the traditional tray-type four-way vehicle, there are two plates for supporting and lifting goods. Among them, the contact surfaces of the two plates with the goods are relatively small. Therefore, the traditional tray-type four-way vehicle also has the problem of poor stability in supporting goods. In this regard, in this embodiment, referring to Figure 1 and Figure 2 , the tray member 300 of the present application is provided with a supporting surface for supporting and lifting goods, and its area is larger than the sum of the contact areas of the two plates of the traditional tray-type four-way vehicle. Therefore, the design of the supporting surface of the tray member 300 of the present application has better stability in supporting goods.

[0042] Through the above structure, the first driving member 240 can drive one of the first linkage rod groups 220 to rotate, so as to drive all the first rotating cylinders 210 to rotate synchronously through the first gear member 211 and the first linkage rod group 220, so that all the first lifting members 230 are lifted and lowered synchronously to drive the pallet member 300 to be lifted and lowered. It can be seen that, on the one hand, the pallet-type four-way vehicle of the present application can drive the pallet member 300 to be lifted and lowered only by a first driving member 240, so compared with the traditional pallet-type four-way vehicle, its production cost is reduced. On the other hand, all the first lifting members 230 are lifted and lowered synchronously to drive the pallet member 300 to be lifted and lowered, which can reduce the probability of the pallet member 300 being tilted and uneven.

[0043] The first linkage rod assembly 220 includes a fourth rod 221 , a fifth rod 222 , a sixth rod 223 , a first sleeve 224 and a second sleeve 225 .

[0044] Reference Figure 6 and Figure 7 One end of the fourth rod 221 and one end of the sixth rod 223 are rotatably disposed on the vehicle body 100, and are respectively engaged with the corresponding two first gear members 211, the other end of the fourth rod 221 and one end of the fifth rod 222 are respectively passed through the two ends of the first sleeve 224 through a spline connection, the other end of the sixth rod 223 and the other end of the fifth rod 222 are respectively passed through the two ends of the second sleeve 225 through a spline connection, and one of the fifth rods 222 is connected to the first driving member 240.

[0045] Through the above structure, on the one hand, the spline connection method has the advantages of uniform force, good centering, and ability to withstand large loads; on the other hand, the spline connection method allows the other end of the fourth rod 221 and one end of the fifth rod 222 to be slidably inserted into the two ends of the first sleeve 224, and the other end of the sixth rod 223 and the other end of the fifth rod 222 to be slidably inserted into the two ends of the second sleeve 225, which can solve the problem of being unable to connect due to insufficient length of the components to a certain extent.

[0046] One end of the fourth rod 221 and one end of the sixth rod 223 are meshed with the corresponding first gear 211. Figure 6 The first gear member 211 is a bevel gear, one end of the fourth rod member 221 and one end of the sixth rod member 223 are both provided with bevel teeth, and one end of the fourth rod member 221 and one end of the sixth rod member 223 are both engaged with the corresponding first gear member 211 through the bevel teeth thereon.

[0047] One of the fifth rods 222 is connected to the first driving member 240. For details, refer to Figure 2 and Figure 3The output end of the first driving member 240 is provided with a first gear, one of the fifth rods 222 is sleeved with a second gear, and the first gear and the second gear are meshed. The first driving member 240 is configured as a motor.

[0048] In this embodiment, refer to Figure 7 The first sleeve 224 and the second sleeve 225 are respectively penetrated by a first fastener and a second fastener. The first fastener abuts against the other end of the fourth rod 221 , and the second fastener abuts against the other end of the fifth rod 222 .

[0049] Through the above structure, the arrangement of the first fastener and the second fastener can respectively improve the connection stability between the fourth rod 221 and the fifth rod 222 and the first sleeve 224, and the connection stability between the sixth rod 223 and the fifth rod 222 and the second sleeve 225.

[0050] In this embodiment, refer to Figure 2 and Figure 3 The front and rear sides of the vehicle body 100 are rotatably connected to two first rotating wheels 410, the vehicle body 100 is provided with a second lifting assembly 500, the second lifting assembly 500 is connected to two rotating wheel frames 600, one of the rotating wheel frames 600 is rotatably connected to two second rotating wheels 420 located on the left side of the vehicle body 100, and the other rotating wheel frame 600 is rotatably connected to two second rotating wheels 420 located on the right side of the vehicle body 100, the vehicle body 100 is provided with a second driving member 430, and the four first rotating wheels 410 and two of the second rotating wheels 420 are all connected to the second driving member 430.

[0051] When the second lifting assembly 500 drives the two rotating wheel frames 600 to rise synchronously, so that all the second rotating wheels 420 are off the ground and all the first rotating wheels 410 are in contact with the ground, the second driving member 430 can synchronously drive the four first rotating wheels 410 and two of the second rotating wheels 420 to rotate, so that the vehicle body 100 moves left or right driven by the four first rotating wheels 410.

[0052] When the second lifting assembly 500 drives the two rotating wheel frames 600 to descend synchronously, so that all the first rotating wheels 410 are off the ground and all the second rotating wheels 420 are in contact with the ground, the second driving member 430 can synchronously drive the four first rotating wheels 410 and two of the second rotating wheels 420 to rotate, so that the vehicle body 100 moves forward or backward driven by the corresponding two of the second rotating wheels 420.

[0053] Through the above structure, the second lifting assembly 500 replaces the complex clutch mechanism, so that the vehicle body 100 can cooperate with the second lifting assembly 500 when driven by a second driving member 430 to achieve movement in the front-rear and left-right directions.

[0054] In this embodiment, refer to Figure 3 The vehicle body 100 is provided with a first installation cavity 110 and two second installation cavities 120, the two second installation cavities 120 are respectively provided at the left and right sides of the first installation cavity 110, the first rotating cylinder 210, the first linkage rod group 220, the first driving member 240 and the second driving member 430 are all provided in the first installation cavity 110, the two rotating wheel frames 600 are respectively provided in the two second installation cavities 120, a part of the second lifting assembly 500 is provided in the first installation cavity 110, and the other part is provided in the second installation cavity 120. Among them, the second driving member 430 is also provided in the accommodating space S, so as to further improve the compactness of the structure of the vehicle body 100.

[0055] In order to improve the stability of the lifting action of the rotating wheel frame 600, refer to Figures 2 to 4 The cavity wall of the second installation cavity 120 is provided with a guide groove 121 , and the rotating wheel frame 600 is provided with a guide block 610 , and the guide block 610 is inserted into the guide groove 121 .

[0056] In order to further improve the stability of the lifting action of the rotating wheel frame 600, refer to Figure 2 and Figure 4 The vehicle body 100 is provided with a vertical guide rod 122 located in the second installation cavity 120 , and the rotating wheel frame 600 is provided with a guide cylinder 620 , which is slidably mounted on the guide rod 122 .

[0057] The second lifting assembly 500 is connected to two rotating wheel frames 600. A portion of the second lifting assembly 500 is disposed in the first installation cavity 110, and another portion is disposed in the second installation cavity 120. For details, refer to Figures 2 to 4, the second lifting assembly 500 includes four second rotating cylinders 510, three second linkage rod groups 520, four second lifting members 530 and a third driving member 540, wherein two second rotating cylinders 510 and one of the second linkage rod groups 520 are rotatably arranged in one of the second installation cavities 120, the other two second rotating cylinders 510 and another second linkage rod group 520 are rotatably arranged in another second installation cavity 120, the four second lifting members 530 are respectively penetrated through the four second rotating cylinders 510, and are respectively threadedly connected to the four second rotating cylinders 510, the two second lifting members 530 located in one of the second installation cavities 120 are connected to one of the rotating wheel frames 600, the two second lifting members 530 located in another second installation cavity 120 are connected to another rotating wheel frame 600, the second rotating cylinder 510 is sleeved with a second gear member 511, and the two ends of the second linkage rod group 520 located in one of the second installation cavities 120 are connected to the second gear members 511 located in the second installation cavity 120. The two second gear members 511 of the mounting cavity 120 are meshed, and the two ends of the second linkage rod group 520 located in the other second mounting cavity 120 are meshed with the two second gear members 511 located in the second mounting cavity 120. The remaining second linkage rod group 520 is partially located in the first mounting cavity 110. The two ends of the remaining second linkage rod group 520 are rotatably arranged in the two second mounting cavities 120, and are respectively meshed with the two second gear members 511 arranged on the two second mounting cavities 120. The third driving member 540 is arranged in the first mounting cavity 110 and located in the accommodating space S. The third driving member 540 is connected to the above-mentioned remaining second linkage rod group 520, wherein the third driving member 540 can drive the above-mentioned remaining second linkage rod group 520 to rotate, so as to drive all the second rotating cylinders 510 to rotate synchronously through the second gear member 511 and the second linkage rod group 520, so that all the second lifting members 530 are lifted and lowered synchronously, so as to synchronously drive the two rotating wheel frames 600 to lift and lower.

[0058] It can be understood that the second lifting assembly 500 and the first lifting assembly 200 have the same structure and connection method.

[0059] Through the above structure, the second lifting assembly 500 can drive the two rotating wheel frames 600 to rise and fall only through a third driving member 540, thereby reducing the number of driving members used and reducing production costs.

[0060] The third driving member 540 is connected to the other second linkage rod group 520. Figure 3 The remaining second linkage rod group 520 is provided with a third gear, one of the first linkage rod groups 220 is rotatably provided with a fourth gear, and the output end of the third driving member 540 is provided with a fifth gear, and the third gear and the fifth gear are both engaged with the fourth gear.

[0061] The four first rotating wheels 410 are all connected to the second driving member 430. For details, refer to Figure 3 The two first rotating wheels 410 located on the same side are connected by a gear assembly 440, and the vehicle body 100 is rotatably connected to the first rod 710. The two ends of the first rod 710 are respectively connected to the two gear assemblies 440. The first rod 710 is sleeved with a sixth gear, and the output end of the second driving member 430 is provided with a seventh gear. The seventh gear is meshed with the sixth gear. The first rod 710 is connected to the second driving member 430, wherein the second driving member 430 can drive the first rod 710 to rotate, so as to synchronously drive all the first rotating wheels 410 to rotate through the two gear assemblies 440.

[0062] The two second rotating wheels 420 are both connected to the second driving member 430. Figure 3 One of the second rotating wheels 420 located on the left side and one of the second rotating wheels 420 located on the right side are both provided with a second rod member, and the vehicle body 100 is rotatably connected with a third rod member 720, and both ends of the third rod member 720 are respectively connected to the two second rod members through a universal coupling 730, and the third rod member 720 is sleeved with an eighth gear, and the output end of the second driving member 430 is provided with a ninth gear, and the ninth gear is meshed with the eighth gear, wherein the second driving member 430 can drive the third rod member 720 to rotate, so as to drive the two second rod members to rotate through the two universal couplings 730, so that the corresponding two second rotating wheels 420 rotate.

[0063] In this embodiment, refer to Figures 1 to 3 The front and rear sides of the vehicle body 100 are both rotatably connected to two third rotating wheels 450 , and the third rotating wheel 450 and the first rotating wheel 410 can abut against the ground together.

[0064] In this embodiment, refer to Figure 2 The first installation cavity 110 is provided with an electric control module 740, and the first driving member 240, the second driving member 430 and the third driving member 540 are all electrically connected to the electric control module 740 to realize the electric control action of the tray-type four-way vehicle.

[0065] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pallet-type four-way vehicle, characterized in that: include Vehicle body (100); The first lifting assembly (200) comprises at least two first rotating cylinders (210), at least one first linkage rod group (220), at least two first lifting members (230) and a first driving member (240). The first rotating cylinders (210) and the first linkage rod group (220) are both rotatably arranged on the vehicle body (100). The at least two first lifting members (230) are respectively inserted into the at least two first rotating cylinders (210) and are respectively threadedly connected to the at least two first rotating cylinders (210). The first rotating cylinder (210) is sleeved with a first gear member (211). The two ends of the first linkage rod group (220) are meshed with the corresponding two first gear members (211). The first driving member (240) is arranged on the vehicle body (100). The first driving member (240) is connected to one of the first linkage rod groups (220). The tray member (300) is connected to the first lifting member (230) and is located above the vehicle body (100), wherein: The first driving member (240) can drive one of the first linkage rod groups (220) to rotate, so as to drive all the first rotating cylinders (210) to rotate synchronously through the first gear member (211) and the first linkage rod group (220), so as to make all the first lifting members (230) rise and fall synchronously, thereby driving the tray member (300) to rise and fall.

2. A pallet-type four-way vehicle according to claim 1, characterized in that: At least two first rotating wheels (410) are rotatably connected to both the front and rear sides of the vehicle body (100); the vehicle body (100) is provided with a second lifting assembly (500); the second lifting assembly (500) is connected to two rotating wheel frames (600); one of the rotating wheel frames (600) is rotatably connected to at least two second rotating wheels (420) located on the left side of the vehicle body (100); the other rotating wheel frame (600) is rotatably connected to at least two second rotating wheels (420) located on the right side of the vehicle body (100); the vehicle body (100) is provided with a second driving member (430); at least one of the first rotating wheels (410) and at least one of the second rotating wheels (420) are connected to the second driving member (430); wherein, The second lifting assembly (500) drives the two rotating wheel frames (600) to rise synchronously, so that all the second rotating wheels (420) are off the ground. After all the first rotating wheels (410) are in contact with the ground, the second driving member (430) can synchronously drive at least one of the first rotating wheels (410) and at least one of the second rotating wheels (420) to rotate, so that the vehicle body (100) moves left or right under the drive of the corresponding first rotating wheel (410). The second lifting assembly (500) drives the two rotating wheel frames (600) to descend synchronously, so that all the first rotating wheels (410) are off the ground. After all the second rotating wheels (420) are in contact with the ground, the second driving member (430) can synchronously drive at least one of the first rotating wheels (410) and at least one of the second rotating wheels (420) to rotate, so that the vehicle body (100) moves forward or backward under the drive of the corresponding second rotating wheels (420).

3. A pallet-type four-way vehicle according to claim 2, characterized in that: At least two of the first rotating wheels (410) located on the same side are connected via a gear assembly (440), the vehicle body (100) is rotatably connected to a first rod (710), two ends of the first rod (710) are respectively connected to the two gear assemblies (440), and the first rod (710) is connected to the second driving member (430), wherein: The second driving member (430) is capable of driving the first rod (710) to rotate, so as to synchronously drive all the first rotating wheels (410) to rotate through the two gear assemblies (440).

4. A pallet-type four-way vehicle according to claim 2, characterized in that: One of the second rotating wheels (420) located on the left side and one of the second rotating wheels (420) located on the right side are both provided with a second rod, the vehicle body (100) is rotatably connected to a third rod (720), both ends of the third rod (720) are respectively connected to the two second rods through a universal coupling (730), the second driving member (430) is connected to the third rod (720), wherein: The second driving member (430) can drive the third rod member (720) to rotate, so as to drive the two second rod members to rotate through the two universal couplings (730), thereby causing the corresponding two second rotating wheels (420) to rotate.

5. A pallet-type four-way vehicle according to claim 2, characterized in that: At least two third rotating wheels (450) are rotatably connected to both the front and rear sides of the vehicle body (100), and the third rotating wheels (450) and the first rotating wheels (410) can abut against the ground together.

6. A pallet-type four-way vehicle according to claim 2, characterized in that: The vehicle body (100) is provided with a first installation cavity (110) and two second installation cavities (120), the two second installation cavities (120) are respectively arranged on the left and right sides of the first installation cavity (110), the first rotating cylinder (210), the first linkage rod group (220), the first driving member (240) and the second driving member (430) are all arranged in the first installation cavity (110), the two rotating wheel frames (600) are respectively arranged in the two second installation cavities (120), and a part of the second lifting assembly (500) is arranged in the first installation cavity (110), and the other part is arranged in the second installation cavity (120).

7. A pallet-type four-way vehicle according to claim 6, characterized in that: The first installation cavity (110) is provided with an electric control module (740), and the first driving member (240), the second driving member (430) and the second lifting assembly (500) are all electrically connected to the electric control module (740).

8. The tray-type four-way vehicle according to claim 1, characterized in that: The number of the first rotating cylinders (210) and the number of the first lifting members (230) are both four, the number of the first linkage rod groups (220) are three, the four first rotating cylinders (210) are distributed at the four corners of a rectangle, the four first rotating cylinders (210) and the three first linkage rod groups (220) jointly surround a receiving space (S), and the first driving member (240) is arranged in the receiving space (S).

9. A pallet-type four-way vehicle according to claim 1, characterized in that: The first linkage rod group (220) comprises a fourth rod (221), a fifth rod (222), a sixth rod (223), a first sleeve (224) and a second sleeve (225); one end of the fourth rod (221) and one end of the sixth rod (223) are both rotatably arranged on the vehicle body (100) and are respectively meshed with the corresponding two first gear members (211); the other end of the fourth rod (221) and one end of the fifth rod (222) are respectively passed through the two ends of the first sleeve (224) through a spline connection; the other end of the sixth rod (223) and the other end of the fifth rod (222) are respectively passed through the two ends of the second sleeve (225) through a spline connection; one of the fifth rods (222) is connected to the first driving member (240).

10. A pallet-type four-way vehicle according to claim 9, characterized in that: The first sleeve (224) and the second sleeve (225) are respectively provided with a first fastener and a second fastener, the first fastener abuts against the other end of the fourth rod (221) or one end of the fifth rod (222), and the second fastener abuts against the other end of the sixth rod (223) or the other end of the fifth rod (222).

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