Pallet truck equipped with rectangular pallets for transport

Abstract

The pallet truck with a pallet for transporting according to the invention includes a forklift body, an arm module, and two support wheels. The arm module is movably mounted on the forklift body, and has a moving distance for the arm module to move up and down relative to the forklift body. The arm module includes two fork arms mounted on both sides of the width direction of the forklift body at a distance from each other. The two support wheels are rotatably mounted on the two fork arms, respectively, and have a moving distance for the support wheels to move toward or away from the fork arms in the up and down direction.

Description

Technical Field

[0001] (Cross - reference to related applications) This invention claims priority based on a Chinese patent application filed on March 21, 2023, with the application number 202310282230.0. The content of the above application is incorporated into this application by reference.

[0002] This invention belongs to the technical field of forklifts, and particularly relates to a pallet truck equipped with a transportation - type square pallet.

Background Art

[0003] A pallet truck is a type of forklift. By inserting the forks of the pallet truck into the insertion holes of the pallet, the pallet and the goods loaded on the pallet can be transported. However, in the example of transporting a square pallet with a pallet truck, when inserting a conventional pallet truck equipped with a transportation - type square pallet into the insertion hole of the square pallet, the support wheels attached to the bottom of the forks and the bottom of the insertion hole of the square pallet rub against each other. After a long time, the square pallet may be damaged due to friction, and the lifespan of the square pallet may be reduced.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The objective of this invention is to provide a pallet truck equipped with a transportation - type square pallet, thereby solving the problem that when inserting a conventional pallet truck into the insertion hole of the square pallet, the bottom of the pallet truck and the bottom of the insertion hole of the square pallet rub against each other.

Means for Solving the Problems

[0005] To achieve the above objective, this invention provides a pallet truck equipped with the following transportation - type square pallet. The pallet truck equipped with the transportation - type square pallet of this invention includes a forklift body, an arm module, and two support wheels. The arm module is movably mounted on the forklift body, has a range of motion that allows it to move vertically relative to the forklift body, and includes two fork arms mounted spaced apart on both sides of the forklift body in the width direction. Each of the two support wheels is rotatably mounted on the two fork arms, and in the vertical direction, the support wheels have a range of motion that allows them to move towards or away from the fork arms.

[0006] In an embodiment of the present invention, the arm module further includes a movable plate, the movable plate is movably mounted on the forklift body, and the fork arm is mounted on the movable plate. The pallet truck equipped with the aforementioned transport grid-shaped pallet further includes a first drive module, the first drive module including a first fixed part and a first telescopic part that moves vertically relative to the first fixed part, the first fixed part being fixed on the forklift body and the first telescopic part being fixed on the movable plate.

[0007] In an embodiment of the present invention, the first drive module includes a first hydraulic cylinder, the first fixed portion includes a cylinder seat of the first hydraulic cylinder, and the first telescopic portion includes a telescopic rod of the first hydraulic cylinder.

[0008] In an embodiment of the present invention, the pallet truck equipped with the transport grid-shaped pallet further includes a first guide module, which guides the moving plate to move vertically relative to the forklift body.

[0009] In an embodiment of the present invention, the pallet truck equipped with the transport grid-shaped pallet includes two first guide portions formed at intervals on the forklift body, and a first guide groove extending in the vertical direction is formed on the outer side where the two first guide portions face each other. The pallet truck equipped with the aforementioned transport grid-type pallet further includes two first pulley mounting plates, the two first pulley mounting plates mounted in the width direction of the moving plate, and the two first pulley mounting plates mounted spaced apart on one side of the moving plate away from the fork arms, a first guide wheel assembly corresponding to the first guide groove mounted on the back side where the two first pulley mounting plates face each other, the first guide wheel assembly coupled within the first guide groove, The first guide module includes the first guide tank and the first guide wheel assembly.

[0010] In an embodiment of the present invention, the pallet truck equipped with the transport grid-type pallet further includes a second drive module, the second drive module includes a drive unit, the drive unit drives the support wheel to move vertically and in a direction toward or toward the fork arm, The second drive module includes a drive unit, a transmission structure, and a support wheel fixing frame. The drive unit includes a second fixed part and a second telescopic part that moves vertically relative to the second fixed part, and the second fixed part is fixed on the forklift body. The transmission structure is movably mounted to the bottom of the fork arm, and the transmission structure comprises a drive end and a connecting end formed at a distance from each other, the drive end being connected to the second fixed part, The support wheel fixing frame is rotatably connected to the connection end of the transmission structure, and the support wheel is rotatably mounted on the support wheel fixing frame.

[0011] In an embodiment of the present invention, the transmission structure includes an upper and lower rotating arm, a connecting arm, a push rod, and a traction unit. The upper and lower rotating arm is attached to the fork arm by a hinge, and the connecting end is formed on the upper and lower rotating arm. The connecting arm is attached to the fork arm by a hinge, and the connecting arm and the vertical rotation arm are attached to both sides of the fork arm in the longitudinal direction, One end of the push rod is connected to one side of the upper and lower rotating arm that is separated from the support wheel, and the other end is connected to the connecting arm. The towing unit is mounted on the forklift body so as to rotate up and down, one end of the towing unit is rotatably connected to the push rod, and the drive end is formed on one side of the towing unit that is away from the push rod.

[0012] In an embodiment of the present invention, the pallet truck equipped with the transport grid-type pallet further includes a second guide module, the second guide module guiding the movement of the towing unit.

[0013] In an embodiment of the present invention, the second guide module includes two second guide plates and two second guide wheel sets. The two second guide plates are mounted on both sides of the forklift body in the width direction with a gap between them, and a second guide groove extending in the vertical direction is formed on the opposing surfaces where the two second guide sections face each other. The two second guide wheel sets are mounted facing the second guide tank and rotatably mounted on the outside facing the traction unit, and the traction unit is coupled to the second guide tank by the second guide wheel sets.

[0014] In an embodiment of the present invention, the drive unit includes a second hydraulic cylinder, the second fixed unit includes the cylinder seat of the second hydraulic cylinder, and the second telescopic unit includes the telescopic rod of the second hydraulic cylinder. [Effects of the Invention]

[0015] In the pallet truck equipped with the grid-type transport pallet of the present invention, an arm module is mounted on the forklift body so as to move vertically, and the arm module includes a fork arm, with a support wheel attached to the bottom of the fork arm. The support wheel has a range of motion that allows it to move towards or away from the fork arm. When using the pallet truck equipped with the grid-type transport pallet of the present invention, when the fork arm is inserted into the insertion hole of the grid-type pallet, the support wheel is retracted into the bottom of the fork arm. This prevents friction between the support wheel and the bottom of the grid-type pallet. When the fork arm is inserted to a predetermined position in the grid-type pallet, the support wheel moves away from the fork arm and is supported by the ground by being exposed through the through hole of the grid-type pallet. [Brief explanation of the drawing]

[0016] To further explain the technical aspects of embodiments of the present invention or the prior art, the drawings relating to embodiments of the present invention or the prior art will be briefly described below. It should be noted that the drawings below are merely illustrative of the present invention, and therefore, those skilled in the art can imagine other drawings from these drawings without conducting any creative research. [Figure 1] This is a perspective view showing the structure of a pallet truck equipped with a transport grid-type pallet according to an embodiment of the present invention. [Figure 2] Figure 1 is a perspective view showing the structure of the forklift body from which the case is removed in a pallet truck equipped with a rectangular pallet for transport. [Figure 3] Figure 1 is a perspective view showing the structure of the arm module of a pallet truck equipped with a rectangular pallet for transport. [Figure 4] Figure 1 is a perspective view showing the structure of the second drive module of a pallet truck equipped with a rectangular pallet for transport. [Figure 5] Figure 4 is a perspective view showing the transmission structure of a pallet truck equipped with a rectangular pallet for transport. [Figure 6]It is a perspective view showing some components of the transmission structure of FIG. 5. [Figure 7] It is a perspective view showing the structure of the field-type pallet in a pallet truck equipped with the field-type pallet for transportation of the present invention.

Embodiments for Carrying Out the Invention

[0017] In order to explain the object, technical features and effects of the present invention in more detail, hereinafter, matters of the present invention will be explained in more detail with reference to the drawings of the present invention.

[0018] Hereinafter, technical matters according to embodiments of the present invention will be explained in more detail with reference to the drawings of embodiments of the present invention. The following embodiments are merely illustrative of the present invention and do not represent all embodiments. A person skilled in the art can conceive of other embodiments from the following embodiments of the present invention without creative research, and it is natural that such embodiments are also included in the present invention even if there are such embodiments.

[0019] It should be noted that the directional terms (for example, up, down, left, right, front, rear, etc.) in this specification represent the position where a predetermined matter is relative to another matter and the movement of a predetermined matter relative to another matter. When the posture of a predetermined matter changes, the directional terms may also change accordingly.

[0020] Also, terms such as "first", "second", "symmetric", "array", etc. in this specification are for explaining technical features and do not explicitly or implicitly indicate the importance of technical features or the quantity of technical features. Matters with terms such as "first", "symmetric", etc. explicitly or implicitly indicate that one or more features are included. When a person skilled in the art can easily implement the combination of each technical matter of the present invention by combining the technical matters of each embodiment of the present invention, it is natural that such a combination of each technical matter is included in the present invention. When combining the technical matters of each embodiment of the present invention, if contradictions occur or it becomes impossible to implement, it is natural that such a combination of each technical matter is not included in the present invention.

[0021] A pallet truck is a type of forklift. By inserting the forks of a pallet truck into the insertion holes of a pallet, pallets and the goods loaded on them can be transported. However, in the case of transporting grid-type pallets with a pallet truck, when inserting a pallet truck equipped with conventional grid-type pallets into the insertion holes of the grid-type pallets, friction occurs between the supporting wheels attached to the bottom of the forks and the bottom of the insertion holes of the grid-type pallets. If this continues for a long time, the grid-type pallets may be damaged by friction, potentially reducing their lifespan.

[0022] To solve the aforementioned problem, the object of the present invention is to provide a pallet truck equipped with a rectangular pallet for transport, thereby solving the problem of friction between the pallet truck and the bottom of the insertion hole of the rectangular pallet when inserting a conventional pallet truck into the insertion hole of the rectangular pallet.

[0023] Referring to Figure 1, the pallet truck 10000 equipped with the transport grid-type pallet includes a forklift body 1, an arm module 2, and two support wheels 3, the arm module 2 being movably mounted on the forklift body 1. The arm module 2 of the pallet truck 10000 equipped with the transport grid-type pallet has a travel distance that allows it to move vertically relative to the forklift body 1. The arm module 2 includes two fork arms 22 mounted spaced apart on both sides of the width direction of the forklift body 1, and the two support wheels 3 are each rotatably mounted on the two fork arms 22. In the vertical direction, the support wheels 3 have a travel distance that allows them to move toward or away from the fork arms 22.

[0024] In an embodiment of the present invention, an arm module 2 is mounted on a forklift body 1 so as to move vertically, and the arm module 2 includes a fork arm 22, with a support wheel 3 attached to the bottom of the fork arm 22. The support wheel 3 has a range of motion that allows it to move towards or away from the fork arm 22. Referring to Figures 1 and 7, when using a pallet truck 10000 equipped with a grid-type pallet for transport, when the fork arm 22 is inserted into the insertion hole 81 of the grid-type pallet 8, the support wheel 3 is housed at the bottom of the fork arm 22, thereby preventing friction between the support wheel 3 and the bottom 82 of the grid-type pallet 8. When the fork arm 22 is inserted to a predetermined position in the grid-type pallet 8, the support wheel 3 moves away from the fork arm 22 and comes into contact with the ground by being exposed through the through hole 83 of the grid-type pallet 8 (i.e., the support wheel 3 is supported by the ground).

[0025] The fork arm 22 needs to be driven to move vertically. In an embodiment of the present invention, referring to Figures 2 and 3, the arm module 2 further includes a movable plate 21, the movable plate 21 is movably mounted on the forklift body 1, and the fork arm 22 is mounted on the movable plate 21. The pallet truck 10000 equipped with the transport grid pallet further includes a first drive module 4, the first drive module 4 includes a first fixed part and a first telescopic part that moves vertically relative to the first fixed part. The first fixed part is fixed on the forklift body 1, and the first telescopic part is fixed on a drive plate 211 of the movable plate 21. This structure allows the fork arm 22 to be driven to move vertically. The first drive module 4 may be a drive air cylinder or a drive hydro-cylinder, but the present invention is not limited thereto. In an embodiment of the present invention, the first drive module 4 includes a first hydraulic cylinder 4a, the first fixed portion includes a cylinder seat of the first hydraulic cylinder 4a, and the first telescopic portion includes a telescopic rod of the first hydraulic cylinder 4a.

[0026] Referring to Figures 2 and 3, in order to ensure the stability of the movement of the fork arm 22, the pallet truck 10000 equipped with the transport grid-type pallet of the present invention further includes a first guide module 5. The first guide module 5 guides the moving plate 21 to move vertically relative to the forklift body 1. The first guide module 5 may consist of rails and couplings connected to the rails, or it may consist of guide holes and guide rods inserted into the guide holes, but the present invention is not limited thereto. In an embodiment of the present invention, the pallet truck 10000 equipped with the transport grid-type pallet includes two first guide parts formed at intervals on the forklift body 1, and a first guide groove 51 extending vertically is formed on the outer side where the two first guide parts face each other. The pallet truck 10000 equipped with the transport grid-type pallet further includes two first pulley mounting plates, the two first pulley mounting plates mounted in the width direction of the moving plate 21. Specifically, the two first pulley mounting plates are mounted at intervals on one side of the moving plate 21 away from the fork arm 22. On the back side of the two opposing first pulley mounting plates, a first guide wheel assembly 52 corresponding to the first guide groove 51 is attached. The first guide wheel assembly 52 is coupled within the first guide groove 51 so as to slide in the longitudinal direction of the first guide groove 51. This guides the movement of the movable plate 21 and ensures the stability of the movement of the fork arm 22.

[0027] The support wheels 3 need to be driven to move. In an embodiment of the present invention, referring to Figures 4 to 6, the pallet truck 10000 equipped with the transport grid-type pallet further includes a second drive module 6, the second drive module 6 includes a drive unit 61. The drive unit 61 drives the support wheels 3 to move vertically and in a direction toward or toward the fork arms 22. The second drive module 6 includes the drive unit 61, a transmission structure 62, and a support wheel fixing frame 63. The drive unit 61 includes a second fixed part and a second telescopic part that moves vertically relative to the second fixed part, the second fixed part being fixed on the forklift body 1. The transmission structure 62 is movably mounted on the bottom of the fork arms 22. The transmission structure 62 has a drive end and a connecting end formed at a distance from each other, the drive end being connected to the second fixed part, and the support wheel fixing frame 63 being rotatably connected to the connecting end of the transmission structure 62. The support wheel 3 is rotatably mounted on the support wheel fixing frame 63. The drive structure drives the transmission structure 62 to move, and the transmission structure 62 drives the support wheel fixing frame 63 to move. This allows control over whether the support wheel 3, which is rotatably mounted on the support wheel fixing frame 63, is housed at the bottom of the fork arm 22 or exposed to the outside.

[0028] Referring to Figures 5 and 6, the transmission structure 62 includes an upper and lower rotating arm 621, a connecting arm 622, a push rod 623, and a traction unit 624 to drive the support wheel fixing frame 63 to move. The upper and lower rotating arm 621 is rotatably attached to the fork arm 22 by a hinge. The connecting end is formed on the upper and lower rotating arm 621. The connecting arm 622 is rotatably attached to the fork arm 22 by a hinge. The connecting arm 622 and the upper and lower rotating arm 621 are attached to both sides of the fork arm 22 in the longitudinal direction, respectively. One end of the push rod 623 is connected to one side of the upper and lower rotating arm 621 away from the support wheel 3, and the other end is connected to the connecting arm 622. The traction unit 624 is mounted on the forklift body 1 so as to rotate up and down, and one end of the traction unit 624 is rotatably connected to the push rod 623. The drive end is formed on one side of the traction unit 624, away from the push rod 623. Referring to Figure 7, the vertical rotating arm 621 is attached to the fork arm 22 by a vertical rotating arm connecting part 6213, rotatably connected to the push rod 623 by a rod-shaped arm hinge 6212, and rotatably connected to the support wheel 3 by a rotating arm hinge 6211. The connecting arm 622 is connected to the fork arm 22 by a connecting arm hinge 6221, rotatably connected to the push rod 623 by an arm hinge 6222, and connected to the traction unit 624 by a connecting arm drive end 6223. This structure allows the support wheel 3 to be driven to rotate.

[0029] Referring to Figure 5, in order to ensure the stability of the movement of the towing unit 624, the pallet truck 10000 equipped with the transport grid-type pallet of the present invention further includes a second guide module 7. The second guide module 7 guides the movement of the towing unit 624. The second guide module 7 may consist of rails and couplings connected to rails, or it may consist of guide holes and guide rods inserted into the guide holes, but the present invention is not limited thereto. In an embodiment of the present invention, the second guide module 7 includes two second guide plates 71 and two second guide wheel sets 72, the two second guide plates 71 being mounted spaced apart on both sides in the width direction of the forklift body 1. A second guide groove extending in the vertical direction is formed on the opposing surfaces where the two second guide units face each other. The two second guide wheel sets 72 are mounted facing the second guide groove and are rotatably mounted on the outside where the towing unit 624 faces. The towing unit 624 is coupled to the second guide groove by the second guide wheel sets 72 so as to slide in the longitudinal direction of the second guide groove. This allows the movement of the traction unit 624 to be guided.

[0030] The present invention does not limit the use of an air cylinder or a hydraulic cylinder as the drive unit 61 in order to drive the traction unit 624 to move. In an embodiment of the present invention, the drive unit 61 includes a second hydraulic cylinder 61a, the second fixed unit includes the cylinder seat of the second hydraulic cylinder 61a, and the second telescopic unit includes the telescopic rod of the second hydraulic cylinder 61a.

[0031] Although embodiments of the present invention have been described above, these embodiments are merely illustrative examples of the present invention, and therefore the present invention is not limited to the configurations of these embodiments. Persons skilled in the art can make design changes, improvements, and substitutions to the embodiments without departing from the spirit of the present invention, and such changes will naturally still fall within the scope defined by the claims of the present invention. [Explanation of Symbols]

[0032] 10,000 Pallet truck equipped with rectangular pallets for transport 1. Forklift body 2 Arm Modules 21 Mobile plate 211 Drive plate 22 Fork Arms 3 Support wheels 4. First drive module 4a First hydraulic cylinder 5. First Guidance Module 51 First guide tank 52 First Guide Wheel Assembly 6. Second drive module 61 Drive unit 61a Second hydraulic cylinder 62 Transmission Structure 621 Up and down rotating arm 6211 Rotating Arm Hinge 6212 Rod-shaped arm hinge 6213 Upper and lower rotating arm connecting part 622 Connecting Arm 6221 Linking Arm Hinge 6222 Arm Hinge 6223 Connecting arm drive end 623 Pushrod 624 Traction section 63 Support wheel fixing frame 7. Second Guidance Module 71 Second Information Board 72 Second Guide Wheel Assembly 8 grid-shaped pallets 81 Insertion hole 82 Bottom 83 Through hole

Claims

1. The forklift includes the main body, arm module, two support wheels, first drive module, and second drive module. The arm module is movably mounted on the forklift body, the arm module has a travel distance relative to the forklift body, the arm module includes two fork arms spaced apart on both sides in the width direction of the forklift body, the arm module further includes a movable plate, the movable plate is movably mounted on the forklift body, and the fork arms are mounted on the movable plate. Each of the two support wheels is rotatably mounted on the two fork arms, and in the vertical direction, the support wheels have a range of motion that allows them to move towards or away from the fork arms. The first drive module includes a first fixed portion and a first telescopic portion that moves vertically relative to the first fixed portion, the first fixed portion being fixed on the forklift body and the first telescopic portion being fixed on the movable plate. The second drive module includes a drive unit, which drives the support wheel to move vertically and in a direction toward or toward the fork arm. The second drive module includes a drive unit, a transmission structure, and a support wheel fixing frame. The drive unit includes a second fixed part and a second telescopic part that moves vertically relative to the second fixed part, and the second fixed part is fixed on the forklift body. The transmission structure is movably mounted to the bottom of the fork arm, and the transmission structure comprises a drive end and a connecting end formed at a distance from each other, the drive end being connected to the second fixed part, The support wheel fixing frame is rotatably connected to the connection end of the transmission structure, and the support wheel is rotatably mounted on the support wheel fixing frame. The drive unit includes a second hydraulic cylinder, the second stationary unit includes the cylinder seat of the second hydraulic cylinder, and the second telescopic unit includes the telescopic rod of the second hydraulic cylinder. A pallet truck equipped with a rectangular pallet for transport, characterized by the following features.

2. A pallet truck equipped with a transport grid-type pallet according to claim 1, characterized in that the first drive module includes a first hydraulic cylinder, the first fixed part includes a cylinder seat of the first hydraulic cylinder, and the first telescopic part includes a telescopic rod of the first hydraulic cylinder.

3. The pallet truck equipped with the aforementioned transport grid-shaped pallet further includes a first guide module, the first guide module guiding the moving plate to move vertically relative to the forklift body, as described in claim 1.

4. The pallet truck equipped with the aforementioned transport grid-shaped pallet includes two first guide sections formed at intervals on the forklift body, and a first guide groove extending in the vertical direction is formed on the outer side where the two first guide sections face each other. The pallet truck equipped with the aforementioned transport grid-type pallet further includes two first pulley mounting plates, the two first pulley mounting plates being mounted in the width direction of the moving plate, and the two first pulley mounting plates being mounted spaced apart on one side of the moving plate away from the fork arms, and a first guide wheel assembly corresponding to the first guide groove being mounted on the back side where the two first pulley mounting plates face each other, the first guide wheel assembly being coupled within the first guide groove, The pallet truck equipped with a transport grid-type pallet according to claim 3, characterized in that the first guide module includes the first guide tank and the first guide wheel assembly.

5. The transmission structure includes an upper and lower rotating arm, a connecting arm, a push rod, and a traction unit. The upper and lower rotating arm is attached to the fork arm by a hinge, and the connecting end is formed on the upper and lower rotating arm. The connecting arm is attached to the fork arm by a hinge, and the connecting arm and the vertical rotation arm are attached to both sides of the fork arm in the longitudinal direction, One end of the push rod is connected to one side of the upper and lower rotating arm that is separated from the support wheel, and the other end is connected to the connecting arm. The pallet truck equipped with a transport grid-type pallet according to claim 1, characterized in that the towing unit is mounted on the forklift body so as to rotate up and down, one end of the towing unit is rotatably connected to the push rod, and the drive end is formed on one side of the towing unit that is away from the push rod.

6. The pallet truck equipped with the aforementioned transportable grid-shaped pallet further includes a second guide module, the second guide module guiding the movement of the towing unit, as described in claim 5.

7. The aforementioned second guide module includes two second guide boards and two second guide wheel sets. The two second guide plates are mounted on both sides of the forklift body in the width direction with a gap between them, and a second guide groove extending in the vertical direction is formed on the opposing surfaces where the two second guide plates face each other. A pallet truck equipped with a transport grid-type pallet according to claim 6, characterized in that the two second guide wheel sets are mounted facing the second guide tank and the towing section is rotatably mounted on the outside facing it, and the towing section is coupled into the second guide tank by the second guide wheel sets.

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