A pallet car

Abstract

The application discloses a tray type four-way vehicle, which comprises a vehicle body, a first lifting assembly and a tray part. The first lifting assembly comprises at least two first rotating cylinders, at least one first linkage rod group, at least two first lifting parts and a first driving part. The first rotating cylinders and the first linkage rod group are rotatably arranged on the vehicle body. The at least two first lifting parts are respectively arranged in the at least two first rotating cylinders and are respectively threadedly connected with the at least two first rotating cylinders. The first rotating cylinders are provided with first gear parts. The two ends of the first linkage rod group are engaged with the corresponding two first gear parts. The first driving part is arranged on the vehicle body and is connected with one of the first linkage rod groups. The tray part is connected with the first lifting parts and is arranged above the vehicle body.

Description

Technical Field

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

[0002] Pallet-type four-way carts are suitable for high-density storage and rapid retrieval scenarios. They can lift goods on warehouse shelves and move them to preset positions in the forward, backward, left, and right directions before unloading them to complete the goods handling operation. The lifting assembly is the key component of the pallet-type four-way cart for lifting or unloading goods. Existing pallet-type four-way carts have a lifting assembly consisting of a pallet, four lifting components, and four drive components. The four drive components drive the four lifting components to move up and down, thereby driving the pallet connected to the lifting components to complete the lifting or unloading action of the goods. However, the inventors found in actual production and use that the above-mentioned existing pallet-type four-way carts have the following problems: 1. The number of drive components is relatively large, resulting in a high production cost for the pallet-type four-way cart; 2. The four drive components driving the four lifting components to move up and down are prone to causing the pallet to tilt or become uneven. 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 proposes a pallet-type four-way vehicle.

[0004] According to an embodiment of the present invention, a pallet-type four-way vehicle includes a vehicle body, a first lifting assembly, and a pallet component. The first lifting assembly includes at least two first rotating cylinders, at least one first linkage rod group, at least two first lifting components, and a first driving component. The first rotating cylinders and the first linkage rod groups are rotatably disposed on the vehicle body. The at least two first lifting components are respectively passed through the at least two first rotating cylinders and are respectively threadedly connected to the at least two first rotating cylinders. The first rotating cylinders are fitted with first gear components. The two ends of the first linkage rod groups mesh with the corresponding two first gear components. The first driving component is disposed on the vehicle body and 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. 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 as to drive all the first lifting components to rise and fall synchronously, thereby driving the pallet component to rise and fall.

[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] With 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 and the first linkage rod group, so that all the first lifting members can be raised and lowered synchronously, thereby driving the pallet to rise and fall. Thus, on the one hand, the pallet-type four-way vehicle of this application can drive the pallet to rise and fall with only one first driving member, so its production cost is reduced compared with the traditional pallet-type four-way vehicle. On the other hand, the synchronous raising and lowering of all the first lifting members to drive the pallet to rise and fall can reduce the probability of the pallet tilting and becoming uneven.

[0008] According to some embodiments of the present invention, at least two first rotating wheels are rotatably connected to both the front and rear sides of the vehicle body. The vehicle body is provided with a second lifting assembly, which is connected to two rotating wheel frames. One rotating wheel frame 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, and at least one first rotating wheel and at least one second rotating wheel are connected to the second driving member. The second lifting assembly drives the two rotating wheel frames to rise synchronously, so that all the second rotating wheels are lifted off the ground. After all the first rotating wheels are in contact with the ground, the second driving member can synchronously drive at least one first rotating wheel and at least one second rotating wheel to rotate, so that the vehicle body moves left or right under the drive of the corresponding first rotating wheel. The second lifting assembly drives the two rotating wheel frames to fall synchronously, so that all the first rotating wheels are lifted off the ground. After all the second rotating wheels are in contact with the ground, the second driving member can synchronously drive at least one first rotating wheel and at least one second rotating wheel to rotate, so that the vehicle body moves forward or backward under the drive of the corresponding second rotating wheel.

[0009] According to some embodiments of the present invention, at least two first rotating wheels located on the same side are connected by a gear assembly, the vehicle body is rotatably connected to a first rod, the two ends of the first rod are respectively connected to the two gear assemblies, the first rod is connected to a second driving member, wherein the second driving member can drive the first rod to rotate so as to synchronously drive all 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 and one of the second rotating wheels located on the right are each provided with a second rod. The vehicle body is rotatably connected to a third rod. The two ends of the third rod are respectively connected to the two second rods through universal couplings. The second driving member is connected to the third rod. 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, thereby causing the corresponding two second rotating wheels to rotate.

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

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

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

[0014] According to some embodiments of the present invention, there are four first rotating cylinders and four first lifting members, three first linkage rod groups, four first rotating cylinders distributed in a rectangular quadrangle, four first rotating cylinders and three first linkage rod groups together surround a receiving space, and the first driving member is disposed in the receiving space.

[0015] According to some embodiments of the present invention, the first linkage assembly 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 disposed on the vehicle body and respectively mesh with two corresponding first gear components. The other end of the fourth rod and one end of the fifth rod are respectively splined and pass through the two ends of the first sleeve. The other end of the sixth rod and the other end of the fifth rod are respectively splined and pass through the two ends of the second sleeve. One of the fifth rods is connected to the first driving component.

[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 abutting against the other end of the fourth rod or one end of the fifth rod, and the second fastener abutting against the other end of the sixth rod or the other end of the fifth rod. Attached Figure Description

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

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

[0019] Figure 2 for Figure 1 A partial exploded view of the tray-type four-way vehicle shown;

[0020] Figure 3 for Figure 1 The diagram shows the structure of the pallet-type four-way vehicle after some components have been removed.

[0021] Figure 4 for Figure 1 A cross-sectional view of the pallet-type four-way vehicle shown after some components have been removed;

[0022] Figure 5 for Figure 4 A magnified view of part A shown in the diagram;

[0023] Figure 6 for Figure 3 A cross-sectional view of the first rotating cylinder, part of the first linkage group, and the first lifting component shown in the figure;

[0024] Figure 7 for Figure 3 The diagram shows a partial exploded view of the first linkage group shown.

[0025] Figure label:

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

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

[0028] Pallet part 300;

[0029] First rotating wheel 410, second rotating wheel 420, second driving component 430, gear assembly 440, third rotating wheel 450;

[0030] The second lifting assembly 500, the second rotating cylinder 510, the second gear component 511, the second linkage rod group 520, the second lifting component 530, and the third driving component 540;

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

[0032] First member 710, third member 720, universal coupling 730, electrical control module 740;

[0033] Storage space S. Detailed Implementation

[0034] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0035] In the description of this invention, the use of terms such as first, second, third, fourth, fifth, etc., is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction 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 components 230, and a first driving component 240. The first rotating cylinders 210 and the first linkage rod groups 220 are rotatably mounted on the vehicle body 100. The four first lifting components 230 are respectively threaded through the four first rotating cylinders 210 and connected to them threadedly. A first gear component 211 is fitted onto each of the first rotating cylinders 210. The two ends of the first linkage rod groups 220 are connected to two corresponding first gears. Wheel 211 meshes, first drive 240 is disposed on vehicle body 100, first drive 240 is connected to one of the first linkage rod groups 220, pallet 300 is connected to first lifting member 230 and located above vehicle body 100, wherein the first drive 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 211 and the first linkage rod group 220, so as to drive all the first lifting members 230 to lift synchronously, thereby driving pallet 300 to lift.

[0040] It is understandable that the two ends of the first linkage assembly 220 mesh with the corresponding two first gear components 211. For details, refer to... Figure 3 The four first gear components 211 are named the first gear component, the second gear component, the third gear component, and the fourth gear component, respectively. The three first linkage groups 220 are named the first linkage group, the second linkage group, and the third linkage group, respectively. The two ends of the first linkage group mesh with the first gear component and the second gear component, respectively. The two ends of the second linkage group mesh with the second gear component and the third gear component, respectively. The two ends of the third linkage group mesh with the third gear component and the fourth gear component, respectively. The four first rotating cylinders 210 and the three first linkage groups 220 together form a U-shaped structure. The four first rotating cylinders 210 and the three first linkage groups 220 together enclose a receiving space S. The first driving component 240 is disposed in the receiving space S to improve the structural compactness of the vehicle body 100.

[0041] It is understandable that traditional pallet-type four-way trucks have two plates for supporting and lifting goods. However, the contact area between these plates and the goods is relatively small, resulting in poor stability when supporting goods. Therefore, in this embodiment, referring to... Figure 1 and Figure 2 The pallet component 300 of this application has a supporting surface for supporting and lifting goods, and its area is larger than the total contact area of ​​the two plates of a traditional pallet-type four-way vehicle. Therefore, the supporting surface design of the pallet component 300 of this application has better stability for supporting goods.

[0042] With 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 as to drive all the first lifting members 230 to lift synchronously, thereby driving the pallet member 300 to lift. Thus, on the one hand, the pallet-type four-way vehicle of this application can drive the pallet member 300 to lift only through one first driving member 240, so its production cost is reduced compared with the traditional pallet-type four-way vehicle. On the other hand, the synchronous lifting of all the first lifting members 230 to drive the pallet member 300 to lift reduces the probability of the pallet member 300 tilting or becoming uneven.

[0043] The first linkage assembly 220 includes a fourth link 221, a fifth link 222, a sixth link 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 mounted on the vehicle body 100 and respectively mesh with the two corresponding first gears 211. The other end of the fourth rod 221 and one end of the fifth rod 222 are respectively connected by splines and passed through the two ends of the first sleeve 224. The other end of the sixth rod 223 and the other end of the fifth rod 222 are respectively connected by splines and passed through the two ends of the second sleeve 225. One of the fifth rods 222 is connected to the first drive member 240.

[0045] With the above structure, on the one hand, the spline connection has the advantages of uniform force distribution, good centering, and the ability to withstand large loads; on the other hand, the spline connection allows the other end of the fourth rod 221 and one end of the fifth rod 222 to slide through 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 slide through the two ends of the second sleeve 225, which can solve the problem of connection due to insufficient component length to a certain extent.

[0046] One end of the fourth link 221 and one end of the sixth link 223 mesh with the corresponding first gear 211. For details, refer to... Figure 6 The first gear component 211 is a bevel gear. One end of the fourth rod 221 and one end of the sixth rod 223 are both provided with bevel teeth. One end of the fourth rod 221 and one end of the sixth rod 223 mesh with the corresponding first gear component 211 through their bevel teeth.

[0047] One of the fifth links 222 is connected to the first drive member 240, specifically, see [link to details]. Figure 2 and Figure 3The first drive member 240 has a first gear at its output end, and a second gear is fitted onto one of the fifth rod members 222. The first gear and the second gear mesh. The first drive 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 provided with 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 setting 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 vehicle body 100 has two first rotating wheels 410 rotatably connected to both the front and rear sides. The vehicle body 100 is provided with a second lifting assembly 500, which is connected to two rotating wheel frames 600. One rotating wheel frame 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 all four first rotating wheels 410 and two of the second rotating wheels 420 are connected to the second driving member 430.

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

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

[0053] With the above structure, the second lifting assembly 500 replaces the complex clutch mechanism, so that the vehicle body 100 can move in the front-back and left-right directions in cooperation with the second lifting assembly 500 when driven by a second driving component 430.

[0054] In this embodiment, refer to Figure 3 The vehicle body 100 has a first mounting cavity 110 and two second mounting cavities 120, which are respectively located on the left and right sides of the first mounting cavity 110. The first rotating cylinder 210, the first linkage rod assembly 220, the first driving component 240, and the second driving component 430 are all located in the first mounting cavity 110. Two wheel frames 600 are respectively located in the two second mounting cavities 120. Part of the second lifting assembly 500 is located in the first mounting cavity 110, and the other part is located in the second mounting cavity 120. The second driving component 430 is also located in the accommodating space S, which can further improve the structural compactness of the vehicle body 100.

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

[0056] To further improve the stability of the lifting action of the 600-degree turntable, refer to Figure 2 and Figure 4 The vehicle body 100 is provided with a vertical guide rod 122 located in the second mounting cavity 120, and the wheel frame 600 is provided with a guide cylinder 620, which is slidably sleeved 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 located in the first mounting cavity 110, and the other portion is located in the second mounting cavity 120. For details, refer to... Figures 2 to 4The 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. Two of the second rotating cylinders 510 and one of the second linkage rod groups 520 are rotatably disposed in one of the second mounting cavities 120, and the other two second rotating cylinders 510 and the other second linkage rod group 520 are rotatably disposed in another second mounting cavity 120. The four second lifting members 530 are respectively threaded through and connected to the four second rotating cylinders 510. Two second lifting members 530 located in one of the second mounting cavities 120 are connected to one of the wheel frames 600, and two second lifting members 530 located in the other second mounting cavity 120 are connected to the other wheel frame 600. A second gear member 511 is sleeved on the second rotating cylinder 510. The two ends of the second linkage rod groups 520 located in one of the second mounting cavities 120 are connected to the gears 510 located in the second mounting cavity 120. Two second gear components 511 in the mounting cavity 120 mesh with each other. The two ends of the second linkage rod group 520 located in another second mounting cavity 120 mesh with the two second gear components 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 disposed in the two second mounting cavities 120 and mesh with the two second gear components 511 disposed in the two second mounting cavities 120 respectively. The third drive member 540 is disposed in the first mounting cavity 110 and located in the accommodating space S. The third drive member 540 is connected to the remaining second linkage rod group 520. The third drive member 540 can drive the 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 components 511 and the second linkage rod group 520, so as to drive all the second lifting components 530 to rise and fall synchronously, thereby driving the two rotating wheel frames 600 to rise and fall synchronously.

[0058] It is understandable that the second lifting component 500 and the first lifting component 200 have the same structure and connection method.

[0059] With the above structure, the second lifting assembly 500 can drive the two wheel frames 600 to lift and lower with only one third drive member 540, thus reducing the number of drive members used and reducing production costs.

[0060] The third driving component 540 is connected to the other second linkage group 520 mentioned above. For details, refer to... Figure 3 The remaining second linkage group 520 is fitted with a third gear, and one of the first linkage groups 220 is rotatably fitted with a fourth gear. The output end of the third drive member 540 is provided with a fifth gear, and both the third gear and the fifth gear mesh with the fourth gear.

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

[0062] Both second rotating wheels 420 are connected to the second driving component 430. For details, please refer to... Figure 3 One of the second rotating wheels 420 on the left and one of the second rotating wheels 420 on the right are each provided with a second rod. The vehicle body 100 is rotatably connected to a third rod 720. The two ends of the third rod 720 are respectively connected to the two second rods through universal couplings 730. The third rod 720 is fitted with an eighth gear. The output end of the second drive member 430 is provided with a ninth gear. The ninth gear and the eighth gear mesh. The second drive member 430 can drive the third rod 720 to rotate, so as to drive the two second rods to rotate through the two universal couplings 730, so as to rotate the corresponding two second rotating wheels 420.

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

[0064] In this embodiment, refer to Figure 2 The first mounting cavity 110 is equipped with an electronic control module 740. The first drive component 240, the second drive component 430 and the third drive component 540 are all electrically connected to the electronic control module 740 so as to realize the electronic control action of the pallet-type four-way vehicle.

[0065] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within 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) includes 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 rotatably disposed on the vehicle body (100). At least two first lifting members (230) are respectively passed through at least two first rotating cylinders (210) and are respectively threadedly connected to 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) mesh with the two corresponding first gear members (211). The first driving member (240) is disposed on the vehicle body (100) and is connected to one of the first linkage rod groups (220). A pallet component (300) is connected to the first lifting component (230) and 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 drive all the first lifting members (230) to lift synchronously, thereby driving the pallet member (300) to lift. 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), and 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 first rotating wheel (410) and at least one second rotating wheel (420) are connected to the second driving member (430). The first linkage assembly (220) includes a fourth link (221), a fifth link (222), a sixth link (223), a first sleeve (224), and a second sleeve (225). One end of the fourth link (221) and one end of the sixth link (223) are rotatably mounted on the vehicle body (100) and mesh with the corresponding two first gears (211). The other end of the fourth link (221) and one end of the fifth link (222) are respectively connected by splines through the two ends of the first sleeve (224). The other end of the sixth link (223) and the other end of the fifth link (222) are respectively connected by splines through the two ends of the second sleeve (225). One of the fifth links (222) is connected to the first drive member (240).

2. A pallet-type four-way vehicle according to claim 1, characterized in that: The second lifting assembly (500) drives the two wheel frames (600) to rise synchronously, causing all the second wheels (420) to lift off the ground. After all the first wheels (410) are in contact with the ground, the second driving member (430) can synchronously drive at least one first wheel (410) and at least one second wheel (420) to rotate, so that the vehicle body (100) moves to the left or right under the drive of the corresponding first wheel (410). The second lifting assembly (500) drives the two wheel frames (600) to descend synchronously, so that all the first wheels (410) are lifted off the ground and all the second wheels (420) are in contact with the ground. Then, the second drive member (430) can synchronously drive at least one first wheel (410) and at least one second wheel (420) to rotate, so that the vehicle body (100) moves forward or backward under the drive of the corresponding second wheel (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 by a gear assembly (440). The vehicle body (100) is rotatably connected to a first rod (710). The two ends of the first rod (710) are respectively connected to two of the gear assemblies (440). The first rod (710) is connected to a second driving member (430). The second drive member (430) is capable of driving the first rod member (710) to rotate so as to drive all the first wheels (410) to rotate synchronously via 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 and one of the second rotating wheels (420) located on the right are each provided with a second rod. The vehicle body (100) is rotatably connected to a third rod (720). The two ends of the third rod (720) are respectively connected to the two second rods via universal couplings (730). The second drive component (430) is connected to the third rod (720). The second drive member (430) can drive the third rod (720) to rotate, so as to drive the two second rods to rotate through the two universal couplings (730), thereby causing the corresponding two second wheels (420) to rotate.

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

6. A pallet-type four-way vehicle according to claim 2, characterized in that: The vehicle body (100) is provided with a first mounting cavity (110) and two second mounting cavities (120). The two second mounting cavities (120) are respectively located on the left and right sides of the first mounting 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 located in the first mounting cavity (110). The two wheel frames (600) are respectively located in the two second mounting cavities (120). The second lifting assembly (500) is partially located in the first mounting cavity (110) and partially located in the second mounting cavity (120).

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

8. A pallet-type four-way vehicle according to claim 1, characterized in that: The first rotating cylinder (210) and the first lifting member (230) are both set to four, and the first linkage rod group (220) is set to three. The four first rotating cylinders (210) are distributed in a rectangular quadrangle. The four first rotating cylinders (210) and the three first linkage rod groups (220) together surround the accommodating space (S). The first driving member (240) is located in the accommodating space (S).

9. A pallet-type four-way vehicle according to claim 1, 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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