A box tipping device and a fork lift truck

Abstract

The utility model provides a kind of box turning device and fork truck, it is related to fork truck box turning device technical field, including the base plate for being connected with fork truck fork frame, the panel rotatable connection on base plate by pivot, the voltage stabilizing mechanism being set on panel and the turning drive mechanism using rack oil cylinder and gear cooperation. Upper hook and quick-change lower hook are set on base plate, for realizing the quick hanging connection locking with fork frame, crossbeam for hanging fork is set on panel, and voltage stabilizing mechanism is compressed and loosened to container by the cooperation of guide square tube, stabilizing arm and stabilizing oil cylinder. Box turning device further includes integrated valve body being communicated with fork truck hydraulic system, by the cooperation of sequence valve, overflow valve, pressure maintaining valve and balance valve, clamping, turning, resetting and loosening action are sequentially completed in the case where only one set of hydraulic oil circuit is used, so that the box turning process is stable and reliable, easy to operate, and the fork truck equipped with the box turning device is suitable for loading and unloading and pouring operation of various material boxes, pallet containers.

Description

Technical Field

[0001] This utility model relates to the technical field of forklift box-flipping attachments, and in particular to a box-flipping device and a forklift. Background Technology

[0002] A container tipper is an attachment mounted on a forklift, commonly used for unloading materials from containers such as pallet boxes and crates. Conventional container tippers are typically fixed to the forklift mast or fork carriage, and a hydraulic cylinder drives the fork carriage or tipping frame to rotate or tilt forward around a pivot, causing the container to tip over and thus unload the material.

[0003] To limit container sway during tipping, a clamping mechanism or device is typically installed on the tipping frame to hold the container's upper edge. Some solutions also use springs, gas springs, or other components to provide clamping force. However, under conditions of large-angle tipping or uneven loading, there is often a lack of active clamping constraint between the lower part of the container and the forks or load-bearing surface, which may still cause slippage relative to the forks. Furthermore, the clamping force is not easily adjusted according to the container's weight and usage conditions, and the performance degradation of the elastic elements after long-term use can also affect the clamping reliability.

[0004] In addition, the clamping mechanism and the tilting cylinder usually need to be controlled separately in terms of their action sequence. Existing tilting attachments are mostly achieved by setting up multiple sets of oil circuits or relatively complex hydraulic valve groups. With many pipelines and connection points, the structure and layout are relatively complicated, the installation, debugging and maintenance costs are high, and the operation is relatively inconvenient. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the technical problem to be solved by this utility model is to propose a box tipper and forklift, and the following technical solution is adopted: This utility model provides a box flipper, comprising: a base plate, a panel, a voltage stabilizing mechanism, and a flipping drive mechanism; The aforementioned substrate is provided with a connection structure for connecting to the forklift fork carriage; The aforementioned panel is rotatably connected to the aforementioned substrate via a pivot. The aforementioned pressure stabilizing mechanism is mounted on the aforementioned panel and is used to press the container supported by the aforementioned panel; The aforementioned flipping drive mechanism includes a rack cylinder and a gear. The cylinder body of the rack cylinder is fixed to the substrate, and the gear is fixed to the rotating shaft of the panel and meshes with the rack at the piston rod end of the rack cylinder to drive the panel to rotate around the rotating shaft. It also includes an integrated valve body, which is mounted on the base plate and connected to the forklift hydraulic system through a set of oil inlet and return ports. The integrated valve body is provided with a sequence valve, which is configured to control the oil circuit of the pressure stabilizing mechanism and the tilting drive mechanism, drive the pressure stabilizing mechanism to press and release the container, and drive the tilting drive mechanism to make the panel complete the tilting and resetting action.

[0006] As a further improvement, the above-mentioned sequence valve is used to control the box tipper to perform the following actions in sequence: Drive the aforementioned pressure stabilizing mechanism to press the container; The aforementioned flipping drive mechanism is driven to rotate the panel to one side to tip over the goods inside the container; Drive the aforementioned flipping drive mechanism to rotate the aforementioned panel in the opposite direction and reset it; Drive the aforementioned pressure stabilizing mechanism to release the container.

[0007] As a further improvement, the aforementioned integrated valve body is also equipped with an overflow valve and a pressure holding valve: The overflow valve is connected to the oil circuit of the pressure stabilizing mechanism and is used to adjust the clamping force of the pressure stabilizing mechanism. The pressure-holding valve is connected to the oil circuit of the pressure-stabilizing mechanism and is used to maintain the pressure-pressurizing state of the pressure-stabilizing mechanism during the rotation of the panel.

[0008] As a further improvement, the integrated valve body is also provided with a balance valve, which is connected to the oil circuit of the tilting drive mechanism and is used to adjust the oil flow when the rack cylinder drives the gear to rotate, thereby adjusting the rotation speed of the panel and making the rotation smooth.

[0009] As a further improvement, a wear-resistant block is also fixedly provided on the aforementioned substrate. The wear-resistant block has a limiting surface that matches the cylinder shape of the aforementioned rack cylinder, and is used to press and limit the rack cylinder during its reciprocating motion, thereby restricting the rack cylinder from rotating around its axis.

[0010] As a further improvement, the aforementioned pressure stabilizing mechanism includes a pressure stabilizing arm and a pressure stabilizing cylinder; a guide square tube is fixedly provided on the aforementioned panel, the aforementioned pressure stabilizing arm is slidably disposed within the aforementioned guide square tube, the cylinder body of the aforementioned pressure stabilizing cylinder is fixed on the aforementioned guide square tube, and its piston rod is drivenly connected to the aforementioned pressure stabilizing arm, for driving the aforementioned pressure stabilizing arm to extend or retract along the aforementioned guide square tube.

[0011] As a further improvement, the aforementioned panel and pressure stabilizing arm have rubber plates fixedly installed on the surfaces that contact the container to increase the friction between them and the container, preventing the container from sliding relative to the container during the inversion process.

[0012] As a further improvement, the connection structure on the aforementioned base plate includes an upper hook and a quick-change lower hook arranged opposite each other. The upper hook is fixedly disposed on the upper edge of the aforementioned base plate and is used to hook onto the upper crossbeam on the forklift fork carriage. The quick-change lower hook is adjustablely disposed on the lower part of the aforementioned base plate and is used to engage and lock with the corresponding part of the lower part of the forklift fork carriage after the mounting is completed, so as to realize the quick installation and removal of the box tipper on the forklift.

[0013] As a further improvement, the front side of the aforementioned panel is welded with upper and lower crossbeams for mounting the forks. The upper and lower crossbeams are arranged horizontally and parallel to each other, with the spacing matching the installation dimensions of the forklift fork carriage, so that the forks can be mounted between the upper and lower crossbeams, thereby carrying the container through the forks and pressing it in conjunction with the aforementioned pressure stabilizing mechanism.

[0014] In another aspect, this utility model provides a forklift equipped with a box tipper as described in any of the preceding claims.

[0015] Compared with the prior art, the beneficial effects of this utility model are: Firstly, this utility model includes a base plate installed on the forklift fork carriage, which is quickly engaged with the fork carriage via an upper hook and a quick-change lower hook. A panel is rotatably connected to the base plate via a rotating shaft. A pressure stabilizing mechanism is installed on the panel to press the container carried by the panel. The tilting drive mechanism uses a rack and pinion cylinder to drive the rotating shaft gear to rotate, thereby realizing the tilting action of the panel. An integrated valve body installed on the base plate is connected to the forklift hydraulic system through a set of oil inlet and outlet ports. The sequence valve inside the valve body controls the pressure stabilizing mechanism and the tilting drive mechanism to perform preset actions under single oil circuit conditions. Through the above structure, without changing the original number of hydraulic interfaces of the forklift, the functions of container carrying, tilting drive, and hydraulic pressure stabilization are integrated into a single attachment. The tilting torque is transmitted by the rack and pinion, and the action process is continuous and controlled, which reduces the number of operation steps and the risk of misoperation, and improves the safety and work efficiency of tilting operations.

[0016] Secondly, in this invention, a guide square tube is fixedly installed on the panel, and the pressure stabilizing arm performs linear telescopic movement within the guide square tube. The cylinder body of the pressure stabilizing cylinder is fixed on the guide square tube, and the piston rod is driven and connected to the pressure stabilizing arm, enabling it to press down containers of different heights and loading states before flipping. Rubber plates are installed on the surfaces of the pressure stabilizing arm and the panel that contact the container to increase friction and reduce local impact, ensuring the container remains stably fitted throughout the flipping process. An overflow valve and a pressure-holding valve are installed in the integrated valve body, which can adjust the clamping force of the pressure stabilizing cylinder according to the container weight and working conditions, and maintain the pressure stabilizing cylinder in a reliable clamping state during panel rotation. A balance valve is arranged in the flipping drive oil circuit, and by controlling the inlet and outlet oil flow of the rack cylinder, the speed of panel flipping and resetting is controllable and the action is smooth. At the same time, a wear-resistant block is used on the outside of the rack cylinder for limiting the cylinder's rotation during reciprocating motion, which helps to ensure the meshing accuracy and service life of the rack and gear. With the above structure, this invention can maintain the stability of the container's posture under conditions such as large-angle flipping and uneven loading, reduce impact and shaking, and improve the reliability and service life of the flipping process.

[0017] Thirdly, this utility model features an upper hook and a quick-change lower hook arranged opposite each other on the base plate. The upper hook engages with the upper crossbeam of the forklift fork carriage, and the quick-change lower hook engages and locks with the corresponding part of the lower part of the fork carriage. This allows the box tipper to be quickly installed and disassembled without disassembling the original forklift structure, resulting in shorter attachment replacement time and greater adaptability to different working conditions. Upper and lower crossbeams are welded to the front of the panel, with dimensions matching the installation dimensions of the forklift fork carriage. Forklift forks can be directly mounted between these upper and lower crossbeams, allowing for container handling using conventional forklift methods without affecting the box tipping function. Through this structural arrangement, the box tipper functions as an independent attachment for tipping and unloading while retaining the conventional use capability of the forks, reducing equipment investment and site modification requirements, and improving the versatility and economy of the entire system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front structural diagram of the present invention; Figure 3 This is a schematic diagram of the rear structure of this utility model; Figure 4This is a top-view structural diagram of the present invention; Figure 5 This is a side view of the present invention. Figure 6 for Figure 5 A schematic diagram of the structure in longitudinal section at point AA.

[0020] Figure label: 1-Baseboard; 2-Panel; 3-Pressure stabilizing arm; 4-Gear; 5-Rack and pinion cylinder; 6-Wear-resistant block; 7-Integrated valve body; 8-Quick-change lower hook; 9-Upper hook; 10-Pressure stabilizing cylinder. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings: In the description of this utility model, the terms "part", "side", "end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model. This utility model provides a box-flipping device for forklifts, including a base plate 1, a panel 2, a pressure stabilizing mechanism, a flipping drive mechanism, and an integrated valve body 7. The components are installed according to a predetermined structural relationship, and through the cooperation of mechanical transmission and hydraulic control, a stable and controllable box-flipping operation process is achieved.

[0022] Specifically, such as Figures 1-3 As shown, base plate 1 serves as the connector between the box tipper and the forklift fork carriage. It is constructed entirely of welded steel plate or profiled steel, with strength and rigidity sufficient to meet the load requirements during attachment operation. The side of base plate 1 facing away from the panel and towards the forklift fork carriage features a dedicated connection structure for attaching to the forklift fork carriage. This connection structure includes an upper hook 9 and a quick-change lower hook 8 positioned opposite each other. The upper hook 9 is fixedly installed at the upper edge of base plate 1, with its hook opening facing the forklift fork carriage, and is used to engage with the upper crossbeam on the forklift fork carriage to form an upper support point. The quick-change lower hook 8 is installed at the lower part of base plate 1 and is adjustablely connected to base plate 1 via an elongated hole, bolt hole, or sliding groove. Its position can be adjusted up and down within a certain range to accommodate the lower crossbeam or lower connection point of different forklift fork carriage models.

[0023] During actual installation, the operator first hooks the upper hook 9 on the base plate 1 to the upper crossbeam of the forklift fork carriage. Then, by adjusting the position of the quick-change lower hook 8, the operator hooks the quick-change lower hook 8 onto the corresponding lower part of the fork carriage and secures it with the locking mechanism, thus completing the quick installation and locking of the box tipper on the forklift. For disassembly, simply release the locking of the quick-change lower hook 8 to remove the box tipper from the forklift fork carriage; the attachment replacement process is simple and efficient.

[0024] like Figure 1 , Figure 2 and Figure 5 As shown, panel 2 is the load-bearing component of the container tilter, used to support containers that need to be tilted via forks or a direct support structure. Panel 2 is rotatably connected to base plate 1 via a pivot that passes through base plate 1. Both ends of the pivot are supported on base plate 1 by bearing seats, allowing panel 2 to rotate relative to base plate 1 around the pivot axis. To facilitate use with forklift forks, upper and lower crossbeams for mounting the forks are welded to the front side of panel 2. The two crossbeams are arranged parallel to each other in the horizontal direction, and their spacing matches the installation dimensions of a standard forklift fork carriage. In use, the forklift forks can be mounted between the upper and lower crossbeams of panel 2, just like mounting them on the original fork carriage. The forks then lift pallets, crates, and other containers, forming a single load-bearing unit with panel 2, which, in conjunction with the container tilter, enables tilting and unloading. Figure 2 and Figure 5 As shown, the panel 2 body can be equipped with reinforcing ribs or side bending edges to improve the panel's bending stiffness and torsional resistance during the flipping process.

[0025] Furthermore, such as Figure 5 and Figure 6 As shown, the tilting drive mechanism drives the panel 2 to rotate around the pivot, which is achieved by the linkage of gear 4 and rack and pinion cylinder 5. The cylinder body of rack and pinion cylinder 5 is fixed to the base plate 1 by a mounting bracket, and the mounting direction is generally horizontal or slightly inclined to match the meshing height with gear 4. Gear 4 is fixed to one end of the pivot of panel 2 and rotates synchronously with the pivot. The piston rod end of rack and pinion cylinder 5 is machined with a rack structure, and the tooth profile parameters of the rack and gear 4 are matched to achieve reliable meshing. When the forklift hydraulic system supplies oil to rack and pinion cylinder 5, the piston rod makes a linear extension or retraction movement in the cylinder body. While the rack is making a linear movement, it meshes with gear 4, converting the linear movement into the rotational movement of gear 4 and pivot, thereby driving panel 2 to rotate forward or backward around the pivot, realizing the tilting and resetting action of the container.

[0026] like Figure 6As shown, to ensure that the rack cylinder 5 does not rotate around its own axis during reciprocating motion, and to prevent the meshing position of the rack and gear 4 from shifting or even disengaging due to cylinder rotation, a wear-resistant block 6 is fixedly installed on the base plate 1 near the rack cylinder 5. The wear-resistant block 6 matches the cylinder body shape of the rack cylinder 5, and the contact surface can be designed as an arc-shaped limiting surface that matches the outer circle of the cylinder, or as a planar limiting structure, to press or laterally support the cylinder during its movement. When the rack cylinder 5 moves back and forth, the outer surface of the cylinder body is in continuous contact with the wear-resistant block 6. The wear-resistant block 6 restricts the rotational freedom of the cylinder, ensuring the stability of the rack's movement direction, so that the gear 4 always maintains a reasonable meshing position throughout the entire stroke, thereby improving transmission accuracy and service life.

[0027] like Figure 1 , Figure 3 and Figure 5 As shown, the pressure stabilizing mechanism is installed in the area above panel 2. Its function is to reliably press the container against the forks or the bearing surface of panel 2 before the tilting action begins, preventing the container from sliding relative to the forks during the tilting process and ensuring a safe and stable tilting process. The pressure stabilizing mechanism includes a guide square tube, a pressure stabilizing arm 3, and a pressure stabilizing cylinder 10. The guide square tube is welded and fixed to the front structure of panel 2, and is generally arranged in a vertical or near-vertical direction to form a guide channel for the reciprocating movement of the pressure stabilizing arm 3. The cross-sectional shape of the pressure stabilizing arm 3 matches the inner cavity of the guide square tube, and it is slidably installed inside the guide square tube, allowing it to move back and forth along the axis of the guide square tube. The cylinder body of the pressure stabilizing cylinder 10 is fixed at the upper end or side of the guide square tube, and the piston rod is rigidly connected to the rear end of the pressure stabilizing arm 3. During operation, the pressure-stabilizing cylinder 10 extends with oil, pushing the pressure-stabilizing arm 3 forward from inside the guide square tube until its front end contacts the upper part or side wall of the container and applies a clamping force, thereby firmly pressing the container onto the bearing surface of the forks or panel 2; after the overturning operation is completed, the pressure-stabilizing cylinder 10 returns oil, the piston rod retracts, and drives the pressure-stabilizing arm 3 backward into the guide square tube, releasing the container.

[0028] To improve pressure stabilization while protecting the container surface, rubber plates are fixedly installed on the surfaces of both panel 2 and the pressure stabilizing arm 3 that directly contact the container. The rubber plates are secured to the metal panel using bolts or adhesive, and are made of industrial rubber with a high coefficient of friction and moderate elasticity. The rubber plates provide significant friction when the pressure stabilizing arm 3 presses the container, preventing relative slippage during inversion. Furthermore, their elastic deformation absorbs localized impacts, preventing indentations or scratches on the container surface. This is particularly suitable for containers such as plastic boxes and galvanized boxes where surface quality is critical.

[0029] like Figure 1 , Figure 3 and Figure 4As shown, the integrated valve body 7 is installed at the front or side of the base plate 1 and is fixedly connected by a bracket. It is a key unit for realizing the hydraulic action control of the box tipper. The integrated valve body 7 is connected to the forklift hydraulic system through a set of oil inlet and return ports, obtaining pressure oil from the forklift and guiding the return oil back to the oil tank. The valve body contains multiple functional valve cores such as sequence valve, relief valve, pressure holding valve and balance valve. Through the design of the internal oil circuit, the pressure stabilizing cylinder 10 and the rack cylinder 5 can achieve coordinated linkage under a set of hydraulic oil circuit conditions. The sequence valve is the core control element, used to control the flow direction and action sequence of hydraulic oil according to preset logic, so that the box tipper can complete clamping, flipping, resetting and releasing actions in sequence during operation.

[0030] In one specific embodiment, the sequential control logic of the integrated valve body 7 is as follows: When the operator operates the hydraulic control handle of the forklift in a certain direction, the pressurized oil is first guided into the pressure stabilizing cylinder 10 through the sequence valve, causing the pressure stabilizing arm 3 to extend forward and press the container against the forks or panel 2; when the pressure stabilizing cylinder 10 reaches the set pressure or the end of the stroke, the internal mechanism of the sequence valve switches, and the pressurized oil is then guided into one oil chamber of the rack cylinder 5, causing the rack cylinder 5 to extend, the rack drives the gear 4 to rotate, and the panel 2 rotates forward around the axis of rotation, realizing the tilting action of the container; after the tilting is completed, the operator returns the handle to the neutral or reverse position, the sequence valve guides the pressurized oil into the other oil chamber of the rack cylinder 5, the rack cylinder 5 retracts, and the panel 2 rotates in the opposite direction to return to the horizontal position; after the panel 2 is reset, the sequence valve guides the pressurized oil again to drive the pressure stabilizing cylinder 10 to retract, the pressure stabilizing arm 3 returns to the inside of the guide square tube, and the container returns to the free state. Through this sequential logic control, the clamping, flipping, resetting and releasing actions in the entire box-flipping process can be completed automatically in sequence, without the need for operators to control multiple cylinders separately, thus reducing the difficulty of operation and the risk of misoperation.

[0031] To adapt to the needs of different forklift main units and different container types, the integrated valve body 7 is also equipped with an overflow valve connected to the oil circuit of the pressure stabilizing cylinder 10. The overflow valve is used to limit the maximum working pressure in the pressure stabilizing cylinder 10, so that the clamping force of the pressure stabilizing arm 3 is kept within a safe and reasonable range. When the container material is relatively soft or thin, the clamping force of the pressure stabilizing arm 3 can be reduced by adjusting the set pressure of the overflow valve to avoid damage to the container. When the container is heavy or needs to be kept stable at a large tilting angle, the set pressure can be appropriately increased to allow the pressure stabilizing arm 3 to apply a greater clamping force, thereby ensuring that the container will not slip or loosen during tilting. The pressure holding valve is arranged in parallel or series with the oil circuit of the pressure stabilizing cylinder 10. After the pressure stabilizing arm 3 clamps the container and reaches the predetermined pressure, the pressure holding valve maintains the pressure in the cylinder through its internal structure, preventing the pressure stabilizing cylinder 10 from retracting due to system pressure fluctuations or minor leaks. This ensures that the pressure stabilizing arm 3 continuously applies clamping force to the container throughout the tilting and resetting process, improving the continuity and safety of the operation.

[0032] The balance valve is connected to the oil circuit of the rack cylinder 5 and is used to throttle and unload the oil entering and exiting the rack cylinder 5. During the tilting operation, the container and the panel 2 form a certain eccentric load. Without speed control, the panel 2 may rotate too fast or start or stop abruptly under gravity. By configuring a balance valve in the oil circuit of the rack cylinder 5, the oil flow rate can be adjusted to keep the movement speed of the panel 2 within a reasonable range when starting to tilt, reaching the maximum tilting angle, and returning to the horizontal position, thus achieving the motion characteristics of slow start, uniform tilting, and slow stop. Depending on the flow rate of the hydraulic pump of different forklifts and the actual working conditions, a fixed throttling plate can also be used in conjunction with the balance valve circuit to further optimize the smoothness of the tilting action.

[0033] In the above embodiment, a typical workflow of the container tipper is as follows: First, the container tipper is installed on the forklift fork carriage using the upper hook 9 and quick-change lower hook 8 on the base plate 1, and the forklift forks are hooked between the upper and lower crossbeams of the panel 2. The forklift drives the forks to insert into the bottom of the container to be tipped or under the pallet, lifting the container off the ground. Subsequently, the operator operates the hydraulic control handle in the forklift driver's position to the working position. The pressurized oil from the forklift hydraulic system enters the integrated valve body 7 through the oil pipe. The sequence valve causes the pressurized oil to preferentially enter the pressure stabilizing cylinder 10. The pressure stabilizing arm 3 extends forward in the guide square tube, and the rubber plate at its front end firmly presses the container onto the forks or panel 2. After the pressing action is completed, the sequence valve switches the channel, and the pressurized oil enters the rack cylinder 5. The rack cylinder 5 extends, and the rack drives the gear 4 to rotate. The panel 2 then flips forward, and the container tilts around the pivot, allowing the internal goods to be smoothly poured out. Throughout the tilting process, the pressure-holding valve ensures that the pressure-stabilizing cylinder 10 maintains a stable pressure, the rubber plate and pressure-stabilizing arm 3 provide reliable clamping force, and the balance valve controls the tilting speed of the control panel 2 to avoid excessive speed or vibration. After tilting is complete, the operator turns the handle to the reverse position, the pressurized oil drives the rack cylinder 5 to retract, the control panel 2 rotates the container to a horizontal position, and then the sequence valve guides the oil to retract the pressure-stabilizing cylinder 10, the pressure-stabilizing arm 3 releases the container, and the entire tilting cycle ends.

[0034] This utility model also provides a forklift equipped with the aforementioned container tipper on its fork carriage. The forklift maintains its original hydraulic system structure, connecting only to the integrated valve body 7 of the container tipper via a single external hydraulic interface. This enables coordinated control of the tilting action of the pressure stabilizing arm 3 and the panel 2, allowing the forklift to perform container tilting and unloading functions. In addition to conventional handling operations, this forklift can also automatically tilt pallet boxes, turnover boxes, and other containers, making it suitable for material handling scenarios in various industries such as warehousing, logistics, food, and chemicals.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A box flipper, characterized in that, include: Substrate (1), panel (2), voltage stabilizing mechanism and flip driving mechanism; The base plate (1) is provided with a connection structure for connecting the forklift fork carriage; The panel (2) is rotatably connected to the substrate (1) via a pivot. The pressure stabilizing mechanism is mounted on the panel (2) and is used to press the container carried by the panel (2); The flipping drive mechanism includes a rack cylinder (5) and a gear (4). The cylinder body of the rack cylinder (5) is fixed to the base plate (1), and the gear (4) is fixed to the rotating shaft of the panel (2) and meshes with the rack at the piston rod end of the rack cylinder (5) to drive the panel (2) to rotate around the rotating shaft. It also includes an integrated valve body (7), which is mounted on the base plate (1) and connected to the forklift hydraulic system through a set of oil inlet and return ports. The integrated valve body (7) is provided with a sequence valve, which is configured to control the oil circuit of the pressure stabilizing mechanism and the flipping drive mechanism, drive the pressure stabilizing mechanism to press and release the container, and drive the flipping drive mechanism to make the panel (2) complete the flipping and resetting action.

2. The box-flipping device according to claim 1, characterized in that, The integrated valve body (7) is also equipped with an overflow valve and a pressure holding valve: The overflow valve is connected to the oil circuit of the pressure stabilizing mechanism and is used to adjust the clamping force of the pressure stabilizing mechanism; The pressure holding valve is connected to the oil circuit of the pressure stabilizing mechanism and is used to maintain the pressure stabilizing mechanism in a pressed state during the rotation of the panel (2).

3. The box-flipping device according to claim 2, characterized in that, The integrated valve body (7) is also equipped with a balance valve, which is connected to the oil circuit of the flipping drive mechanism. It is used to adjust the oil flow rate when the rack cylinder (5) drives the gear (4) to rotate, thereby adjusting the rotation speed of the panel (2) and making the rotation action smooth.

4. The box-flipping device according to claim 1, characterized in that, A wear-resistant block (6) is also fixedly provided on the substrate (1). The wear-resistant block (6) has a limiting surface that matches the cylinder shape of the rack cylinder (5). It is used to press and limit the rack cylinder (5) during reciprocating motion, thereby restricting the rack cylinder (5) from rotating around its axis.

5. The box-flipping device according to claim 1, characterized in that, The pressure stabilizing mechanism includes a pressure stabilizing arm (3) and a pressure stabilizing cylinder (10); a guide square tube is fixedly provided on the panel (2), the pressure stabilizing arm (3) is slidably provided in the guide square tube, the cylinder body of the pressure stabilizing cylinder (10) is fixed on the guide square tube, and its piston rod is drivenly connected to the pressure stabilizing arm (3) to drive the pressure stabilizing arm (3) to extend or retract along the guide square tube.

6. The box-flipping device according to claim 5, characterized in that, The panel (2) and the pressure stabilizing arm (3) are fixedly provided with rubber plates on the surfaces that contact the container, in order to increase the friction between them and the container and prevent the container from sliding relative to each other during the flipping process.

7. The box-flipping device according to claim 1, characterized in that, The connection structure on the base plate (1) includes an upper hook (9) and a quick-change lower hook (8) arranged opposite to each other. The upper hook (9) is fixedly set on the upper edge of the base plate (1) and is used to hook onto the upper crossbeam on the forklift fork carriage. The quick-change lower hook (8) is adjustablely set on the lower part of the base plate (1) and is used to engage and lock with the corresponding part of the lower part of the forklift fork carriage after the mounting is completed, so as to realize the quick installation and removal of the box flipper on the forklift.

8. The box-flipping device according to claim 1, characterized in that, The front side of the panel (2) is welded with upper and lower crossbeams for mounting forks. The upper and lower crossbeams are arranged horizontally and parallel to each other, with the spacing matching the installation dimensions of the forklift fork carriage, so that the forks can be mounted between the upper and lower crossbeams, thereby carrying the container through the forks and cooperating with the pressure stabilizing mechanism for pressing.

9. A forklift, characterized in that, It is equipped with a box-flipping device as described in any one of claims 1-8.

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