Forward-moving pallet fork

Abstract

The utility model discloses a forward-moving pallet fork which comprises a vertical rod, the bottom of the vertical rod is connected with a transverse rod, the vertical rod and the transverse rod form a right-angle structure, the transverse rod is sleeved with a pallet fork sleeve, two piston bodies are arranged in the inner space of the transverse rod, each piston body comprises an oil channel, a piston rod and a piston, and the piston rod is connected with the oil channel. Oil is injected into the oil channel so that the piston rod can move towards the fork sleeve, and the piston rod drives the fork sleeve to move to increase the effective length of the extending end of the fork. According to the utility model, through the telescopic pallet fork, farther single-side loading and unloading are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of material handling, in particular to a forward moving fork. Background Art

[0002] Reach forks, as a crucial piece of logistics equipment, are widely used in cargo handling operations within the warehousing industry. Their primary function, operated by a forklift, is to move cargo along the guide rails deep into the shelves, enabling precise storage and retrieval. With the development of modern logistics and technological advancements, which significantly improve operational efficiency and reduce labor costs, the market is placing higher demands on the performance of reach forks.

[0003] Traditional forks can be used for unloading cargo on wide trucks, allowing two containers to be placed parallel to each other. However, the forks are fixed in length, so after unloading cargo from one side, they need to be moved to the other side to retrieve cargo. This is quite cumbersome. Therefore, a fork that can be synchronously extended and retracted, with high versatility, is needed. Utility Model Content

[0004] The present application provides a forward-moving fork, which realizes single-sided loading and unloading at a longer distance by telescopic forks.

[0005] The present application provides a forward-moving fork, which adopts the following technical solution:

[0006] A forward moving fork comprises a vertical rod, the bottom of which is connected to a cross rod, the vertical rod and the cross rod forming a right-angle structure, the outer portion of the cross rod being sleeved with a fork sleeve, the space inside the cross rod containing two piston bodies, each of the piston bodies comprising an oil passage, a piston rod and a piston, oil injected into the oil passage can cause the piston rod to move toward the fork sleeve, and the piston rod drives the fork sleeve to move to increase the effective length of the extended end of the fork.

[0007] By adopting the above technical solution, the utility model designs a forward moving fork. When in use, the forward moving fork is mainly divided into two parts: a vertical rod and a horizontal rod. The vertical rod is used to be fixed on the forklift, and the horizontal rod is used for loading and unloading. A fork sleeve is provided on the outer side of the horizontal rod, and the length of the horizontal rod can be extended by the fork sleeve, and this extension is retractable. The piston rod in the piston body causes the fork sleeve to move on the outer side of the horizontal rod, thereby increasing the length of the horizontal rod. In this way, goods that are far away or long in length can be loaded and unloaded. At the same time, the piston rod can be retracted after moving, which is more flexible.

[0008] Preferably, a cavity is provided inside the cross bar, the piston body is installed in the cavity, and the portion of the cross bar excluding the cavity is made of solid material.

[0009] By adopting the above technical solution, when in use, the piston body is installed in the cavity inside the cross bar, so that the extension and retraction of the fork sleeve is achieved by utilizing the distance of the hydraulic cylinder, and the remaining parts are made of solid material, which is convenient for improving the load-bearing capacity of the cross bar.

[0010] Preferably, a joint guard plate is provided on the top of the vertical rod, and a fixing hole is provided on the joint guard plate for fixing on a forklift.

[0011] By adopting the above technical solution, when in use, the fork is installed on the forklift using the joint guard plate on the top of the vertical rod, and the joint guard plate is provided with a fixing hole.

[0012] Preferably, the vertical rod and the cross rod are fixed by welding, and this fixing method makes the cross rod more stable during operation.

[0013] By adopting the above technical solution, when in use, the ends of the vertical rod and the horizontal rod are fixed by welding, which not only ensures the stability of the connection between the horizontal rod and the vertical rod, but also improves the bearing capacity of the horizontal rod.

[0014] Preferably, an oil filling port is provided at the end of the oil channel of the piston body, and the oil filling port is used to inject oil into the oil channel and discharge the oil in the oil channel. When injecting oil, the piston rod moves toward the fork sleeve so that the fork sleeve extends along the direction of the cross bar. When discharging oil in the oil channel, the piston rod moves toward the vertical rod so that the fork sleeve is retracted along the direction of the cross bar.

[0015] By adopting the above technical solution, during use, one side of the oil filling port is used for oil filling, and oil is injected through the oil filling port of the oil channel so that the piston rod can reciprocate. When oil is injected, the piston rod controls the fork sleeve to extend, and when oil is discharged, the piston rod controls the fork sleeve to retract.

[0016] Preferably, the piston and the piston rod in the piston body are cooperatively connected, and the movement of the piston in the oil channel drives the piston rod to move toward the fork sleeve or toward the vertical rod.

[0017] By adopting the above technical solution, when in use, after oil is injected, the movement of the piston drives the piston rod to move, thereby driving the fork sleeve to move.

[0018] Preferably, a sealing ring is further provided in the piston body, and the sealing ring is sleeved on the piston to prevent oil leakage in the oil channel. The sealing ring on the piston is a dynamic sealing structure.

[0019] By adopting the above technical solution, when in use, the sealing ring is used to seal the piston, so that the oil in the oil channel will not leak during the movement of the piston.

[0020] Preferably, the end of the piston rod is fixedly connected to the inner wall of the fork sleeve, and the extension and retraction of the fork sleeve outside the cross bar is achieved through the reciprocating motion of the piston rod.

[0021] By adopting the above technical solution, when in use, the piston rod and the inner wall of the fork sleeve are fixedly connected to each other, so that the piston rod drives the fork sleeve to extend and retract.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. This utility model designs a forward-moving fork. By disposing a piston body inside the crossbar and injecting oil into the oil passage, the piston rod drives the fork sleeve to move. This increases the effective length of the fork's extended end, improving the fork's flexibility and working efficiency.

[0024] 2. The forward fork designed in this utility model has a right-angle structure consisting of a vertical rod and a horizontal rod, and the welding fixation method between the two enhances the overall stability of the forward fork, making the fork more stable when carrying heavy objects and improving the efficiency of storage operations;

[0025] 3. The forward moving fork designed in the present invention utilizes the fixed connection structure between the piston rod end and the inner wall of the fork sleeve and the sealing ring design on the piston rod to prevent oil leakage and enhance the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of an embodiment;

[0027] Figure 2 is a cross-sectional view of an embodiment;

[0028] Explanation of the accompanying symbols: 1. Vertical rod; 2. Horizontal rod; 3. Fork sleeve; 4. Piston body; 5. Oil channel; 6. Piston rod; 7. Piston; 8. Joint guard plate; 9. Fixing hole; 10. Oil filling port; 11. Sealing ring. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0030] The utility model discloses a forward moving fork, such as Figure 1 and Figure 2As shown, it includes a vertical rod 1, a joint guard plate 8 is provided on the top of the vertical rod 1, and a fixing hole 9 is provided on the joint guard plate 8 for fixing to a forklift. The joint guard plate 8 is mainly used to connect to the forklift, and its material can also be selected from high-strength metal to ensure a firm connection with the forklift. The fixing hole 9 can be a threaded hole or a through hole, so that it can be fixed to the forklift with a standard screw. The bottom of the vertical rod 1 is connected to the cross bar 2, and the vertical rod 1 and the cross bar 2 form a right-angle structure. The vertical rod 1 and the cross bar 2 are fixed by welding. Specifically, the weld must be designed to be wide enough and evenly distributed to maximize the contact area and enhance the mechanical connection strength. The outer sleeve of the cross bar 2 is provided with a fork sleeve 3, and the interior of the cross bar 2 is provided with a cavity. The piston body 4 is installed in the cavity, and the part of the cross bar 2 excluding the cavity is made of solid material. The solid part can be made of carbon steel or stainless steel. The piston body 4 includes an oil channel 5, a piston rod 6 and a piston 7. The oil channel The material of 5 can be selected according to actual needs. The piston rod 6 is made of high-strength steel and its surface is nitrided to increase wear resistance and fatigue resistance. The inner surface of the piston rod 6 is provided with a spiral groove, which cooperates with the guide structure in the oil channel 5 to make the movement of the piston rod 6 more stable. The piston 7 is made of polyurethane or rubber material and has a dynamic sealing structure to ensure that it will not leak under the action of the oil pressure in the oil channel 5. Oil injected into the oil channel 5 can cause the piston rod 6 to move toward the fork sleeve 3. The piston rod 6 drives the fork sleeve 3 to move, increasing the effective length of the extended end of the fork.

[0031] The end of the oil passage 5 of the piston body 4 is provided with an oil filling port 10. The oil filling port 10 is used to inject oil into the oil passage 5 and discharge the oil in the oil passage 5. One side of the oil filling port 10 is the oil filling side, and the side away from the oil filling side is the oil outlet side. The space on the oil filling side is larger than the oil outlet side, so that a pressure difference occurs on the two sides. When oil is injected, the piston rod 6 moves toward the fork sleeve 3 to extend the fork sleeve 3 along the cross bar 2. When the oil in the oil passage 5 is discharged, the piston rod 6 moves toward the vertical rod 1 to retract the fork sleeve 3 along the cross bar 2. The piston 7 and the piston rod 6 in the piston body 4 are connected with each other. The movement of the piston 7 in the oil passage 5 drives the piston rod 6 to move toward the fork sleeve 3 or toward the vertical rod 1. The piston 7 and the piston rod 6 can be connected by pins, nuts, etc. to ensure the firmness between the two. The diameter of the piston 7 should match the inner diameter of the oil passage 5 to ensure that the pressure inside the oil passage 5 is evenly distributed, avoid the occurrence of unbalanced loading, and ensure that the piston rod 6 moves evenly and reliably. Furthermore, in practical applications, the size of piston 7 can be adjusted to optimize the force exerted by piston rod 6 under varying load conditions. A sealing ring 11 is also provided within piston body 4. This ring fits over piston 7 and prevents oil leakage from oil passage 5. This ring acts as a dynamic seal. Made of a wear-resistant material, it ensures a secure seal. It must not only fit snugly against piston 7 but also maintain a certain degree of flexibility to facilitate sliding of piston 7 within oil passage 5.

[0032] Working Principle: This utility model designs a forward fork that utilizes a piston structure within a crossbar 2. The piston rod 6 is driven by hydraulic oil, thereby enabling the fork sleeve 3 to freely extend and retract on the crossbar 2. This design overcomes the problems associated with traditional manual or mechanically driven forward forks, significantly improving efficiency and reliability during handling and significantly reducing maintenance costs and operational complexity. The sealing ring 11 and dust seal on the piston rod 6 ensure the sealing and service life of the entire hydraulic system.

[0033] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A forward moving fork, characterized by: The utility model comprises a vertical rod (1), wherein the bottom of the vertical rod (1) is connected to a horizontal rod (2), wherein the vertical rod (1) and the horizontal rod (2) form a right-angle structure, wherein the external portion of the horizontal rod (2) is provided with a cargo fork sleeve (3), and the internal space of the horizontal rod (2) contains two piston bodies (4), wherein each of the piston bodies (4) comprises an oil passage (5), a piston rod (6) and a piston (7), and wherein oil is injected into the oil passage (5) so as to enable the piston rod (6) to move toward the cargo fork sleeve (3), and the piston rod (6) drives the cargo fork sleeve (3) to move, thereby increasing the effective length of the extended end of the cargo fork.

2. The forward fork according to claim 1, characterized in that: A cavity is provided inside the cross bar (2), and the piston body (4) is installed in the cavity. The portion of the cross bar (2) excluding the cavity is made of solid material.

3. The forward moving fork according to claim 1, characterized in that: A joint guard plate (8) is provided on the top of the vertical rod (1), and a fixing hole (9) is provided on the joint guard plate (8) for fixing on a forklift.

4. The forward moving fork according to claim 1, characterized in that: The vertical rod (1) and the horizontal rod (2) are fixed by welding, and this fixing method makes the horizontal rod (2) more stable during operation.

5. The forward moving fork according to claim 1, characterized in that: An oil filling port (10) is provided at the end of the oil passage (5) of the piston body (4). The oil filling port (10) is used to inject oil into the oil passage (5) and discharge the oil in the oil passage (5). When injecting oil, the piston rod (6) moves toward the fork sleeve (3) so that the fork sleeve (3) extends along the cross bar (2). When discharging oil from the oil passage (5), the piston rod (6) moves toward the vertical rod (1) so that the fork sleeve (3) retracts along the cross bar (2).

6. The forward moving fork according to claim 1, characterized in that: The piston (7) and the piston rod (6) in the piston body (4) are connected to each other in a cooperative manner. The movement of the piston (7) in the oil passage (5) drives the piston rod (6) to move toward the fork sleeve (3) or toward the vertical rod (1).

7. The forward moving fork according to claim 1, characterized in that: A sealing ring (11) is also provided in the piston body (4). The sealing ring (11) is sleeved on the piston rod (6) and is used to prevent oil leakage in the oil passage (5). The sealing ring (11) on the piston (7) is a dynamic sealing structure.

8. The forward moving fork according to claim 1, characterized in that: The end of the piston rod (6) is fixedly connected to the inner wall of the fork sleeve (3), and the fork sleeve (3) can be extended and retracted outside the cross bar (2) through the reciprocating motion of the piston rod (6).

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