A stacker truck

Abstract

This utility model relates to the field of stacker technology and provides a stacker including a mast; a carriage is lifted and lowered on the mast, and the carriage has a vertically arranged elongated hole; an attachment carrier is lifted and lowered on the carriage; a carrier is movably disposed in the elongated hole, and the carrier is located above the attachment carrier; a pulling member is elongated, with both ends lower than the carrier, one end of the pulling member is disposed on the mast, and the other end passes around the carrier and connects to the attachment carrier; the carrier can move along the arrangement direction of the elongated hole and drive the attachment carrier to rise and fall through the pulling member, while keeping the carriage stationary relative to the mast. The attachment carrier rises and falls independently through the carrier and the pulling member, and the height of the carriage and the mast remains unchanged, thereby avoiding the situation where the carriage is too high to pass through the mast, and improving the passability of the stacker in different scenarios.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of stacker technology, specifically, to a stacker. Background Technology

[0002] As an indispensable vertical handling equipment in logistics warehousing, workshop transfer and other scenarios, stacker trucks achieve efficient lifting and transfer of goods through the coordinated operation of the carriage and the attachment carrier. Its core function is to lift, stack or transfer goods by raising and lowering the carriage on the mast. The carriage drives the attachment carrier (such as forks, pallet racks, etc.) to carry the goods, thereby improving the utilization rate of vertical space and the handling efficiency. It is widely used in various warehouses, production workshops, logistics transfer stations and other places.

[0003] In actual logistics operations, stacker trucks often face complex and diverse operating environments, such as low doors left over from the renovation of workshop passages in old industrial areas (such as brick-concrete doors or steel structure doors with a height of less than 2.2 meters); ramps in front of doors between warehouses and external transfer areas due to ground subsidence or drainage needs (the slope is usually 5°-15°); or temporary low isolation doors and leveling ramps in front of doors set up to separate areas in temporary logistics stations.

[0004] In the aforementioned scenario, when a forklift needs to enter the area inside the doorway via a ramp, on the one hand, to avoid scraping and collisions between the attachment frame and the loaded goods and the ramp surface (especially at the junction of the ramp bottom and the ground or unevenness of the ramp surface), the attachment frame must be raised to a certain height (usually 5-10cm higher than the highest point of the ramp). On the other hand, the rigid linkage structure of traditional forklifts causes the carriage to extend upwards simultaneously when the attachment frame is raised, and the top height of the carriage increases significantly as the attachment frame rises. When the height of the door itself is limited, the top of the carriage can easily exceed the height of the door, preventing the forklift from passing through the doorway to enter the target area. This results in a low throughput for forklifts in such scenarios, requiring them to detour through other passages or manually unload the goods and then pass empty before reloading. This not only significantly increases operating time and labor intensity but may also lead to a decrease in logistics transfer efficiency due to excessively long detour routes. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a stacker truck, which solves the technical problem in the prior art that when the height of the door itself is limited, the top of the carriage easily exceeds the height of the door, causing the stacker truck to be unable to pass through the door to enter the target area, resulting in a low pass rate of the stacker truck in such scenarios.

[0006] According to one aspect, at least one embodiment of the present invention provides a stacker truck, comprising: a mast;

[0007] A carriage, which is lifted and lowered on the gantry, has a vertically arranged elongated hole;

[0008] An attachment carrier, wherein the attachment carrier is elliptically mounted on the slide;

[0009] A support member, which is movably disposed in the elongated hole and is located above the attachment frame;

[0010] A pulling member, which is long and narrow, with both ends lower than the supporting member. One end of the pulling member is mounted on the gantry, and the other end passes around the supporting member and is connected to the attachment frame.

[0011] The carrier can move along the arrangement direction of the elongated hole, and drive the attachment frame to rise and fall through the pulling member, while keeping the carriage stationary relative to the gantry.

[0012] For example, in a stacker truck provided in at least one embodiment of the present invention, the bearing member includes a cylindrical connecting part and load wheels disposed at both axial ends of the cylindrical connecting part;

[0013] The cylindrical connecting part is movable and rotatably disposed in the elongated hole;

[0014] The pulling member has two parts, and the two pulling members are respectively wound around the two carrying wheels.

[0015] For example, in a stacker truck provided in at least one embodiment of the present invention, the load wheel has a receiving groove for the pulling member to be wound around.

[0016] For example, in a stacker truck provided by at least one embodiment of the present invention, a lifting drive component is further included, which is disposed on the gantry and is used to drive the load-bearing component to move up and down;

[0017] A pusher is rotatably connected to the cylindrical connecting part and is disposed at the driving end of the lifting drive component. The pusher is capable of rising under the drive of the lifting drive component.

[0018] For example, in a stacker provided in at least one embodiment of the present invention, the pusher has a pusher portion for abutting against the carriage and pushing the carriage to rise.

[0019] For example, in a stacker provided by at least one embodiment of the present invention, the carriage has a vertically arranged carriage groove;

[0020] The attachment frame is equipped with frame pulleys, which are movably disposed within the frame groove.

[0021] For example, in a stacker truck provided in at least one embodiment of the present invention, the mast has a vertically arranged mast slot;

[0022] The carriage is equipped with carriage pulleys, which are movably disposed within the gantry groove.

[0023] For example, in a stacker truck provided in at least one embodiment of the present invention, two attachments are movably mounted on the attachment carrier, and the two attachments can move toward each other to move closer to or further away from each other.

[0024] For example, in a stacker truck provided in at least one embodiment of the present invention, an adjusting cylinder is also provided on the attachment frame, and the adjusting cylinder is used to drive the two attachments to move.

[0025] For example, in a stacker truck provided in at least one embodiment of the present invention, the pulling component is an oil pipe, and the two pulling components are respectively connected to the oil inlet and oil outlet of the regulating oil cylinder.

[0026] The beneficial effects of the embodiments of this utility model are as follows:

[0027] In this invention, the attachment frame can be raised and lowered independently by the load-bearing and pulling components, while the height of the carriage and gantry remains unchanged. This avoids the situation where the carriage is too high to pass through the gantry, thus improving the passability of the stacker truck in different scenarios. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a stacker truck according to the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of a stacker truck from another perspective in one embodiment (showing the structure at the connection of the pulling component);

[0031] Figure 3 This is a schematic diagram of the structure of the carriage of this utility model;

[0032] Figure 4 This is a structural schematic diagram of the lifting drive component and the push component of this utility model;

[0033] Figure 5This is a partial structural diagram of the load-bearing component, attachment frame, attachment, adjusting cylinder, and pulling component of this utility model;

[0034] Figure 6 This is a partial structural schematic diagram of the load-bearing component and the pulling component of this utility model;

[0035] Figure 7 This is a bottom view of the gantry, carriage, and attachment frame of this utility model.

[0036] In the diagram: 1. Gantry; 101. Gantry slot; 2. Carriage; 201. Long slot; 202. Carriage slot; 203. Carriage pulley; 3. Attachment frame; 301. Frame pulley; 4. Bearing component; 401. Columnar connector; 402. Carriage wheel; 403. Receiving slot; 5. Pulling component; 6. Lifting drive component; 7. Pushing component; 701. Pushing part; 8. Attachment; 9. Adjusting cylinder. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0038] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0039] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0042] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] like Figures 1-7 As shown, this invention illustrates a stacker truck. In some examples, the bottom of the gantry 1 is fixed to the stacker truck chassis, and the side of the gantry 1 is provided with a vertical guide rail for the slide 2. In this design, the guide rail is the gantry groove 101, which ensures the stability of the slide 2 when it is raised and lowered. There are various types of rails, which are not limited here. The slide 2 cooperates with the gantry groove 101 through rollers or sliders. In this design, the slide 2 rolls with the gantry groove 101 through the slide pulley 203 provided on it.

[0044] The slide 2 can be raised and lowered along the guide rail of the gantry 1. The upper part of the slide 2 is provided with a vertically arranged elongated hole 201. In this solution, the elongated hole 201 is set through the slide 2. The elongated hole 201 provides a vertical moving track for the bearing member 4 and at the same time restricts the bearing member 4 to move only in the vertical direction. The length of the elongated hole 201 corresponds to the maximum stroke of the attachment 8 to lift independently.

[0045] The attachment carrier 3 is a structure that directly supports the attachment 8 (such as forks or clamps). The attachment carrier 3 cooperates with the inner track of the carriage 2 through rollers or sliders. In this solution, the inner track of the carriage 2 is the carriage groove 202. There are various types of tracks, which are not limited here. The attachment carrier 3 rolls with the carriage groove 202 through rollers. The attachment carrier 3 is lifted and moved by the guide of the pulling member 5.

[0046] The carrier 4 pulls the pulling component 5 by moving within the elongated hole 201, indirectly driving the attachment frame 3 to rise and fall. In this solution, the lifting drive component 6 (such as a hydraulic cylinder) provides power to push the carrier 4 to move (rise or fall) along the vertical direction of the elongated hole 201.

[0047] The pulling component 5 is a high-strength, long, flexible strip (such as a steel rope, chain, or high-pressure hose). One end is fixed to the bottom of the gantry 1 (or to another position lower than the support component 4), and the other end extends upward and around the support component 4, then continues downward and connects to the attachment carrier 3. In this design, the attachment carrier 3 is provided with a connection hole, through which the pulling component 5 connects to the attachment carrier 3.

[0048] Specifically, in the initial state, the carrier 4 is at the lowest position in the elongated hole 201, and the attachment frame 3 and attachment 8 are at the lowest working height. When the attachment 8 needs to be raised due to a slope, the lifting drive 6 (such as the hydraulic cylinder extending) is operated to drive the carrier 4 to move upward along the elongated hole 201 of the slide 2. Since one end of the pulling member 5 is fixed to the bottom of the gantry 1 (the position remains unchanged) and the other end is connected to the attachment frame 3, when the carrier 4 rises, the end of the pulling member 5 connected to the attachment frame 3 will move upward along with it, pulling the attachment frame 3 to move along the slide groove 202 of the slide 2.

[0049] In some examples, the carrier 4 is composed of a cylindrical connecting part 401 and carrier wheels 402 located at both axial ends of the cylindrical connecting part 401. The cylindrical connecting part 401 extends through two elongated holes 201 of the carriage 2 on both sides. The surface of the cylindrical connecting part 401 slides against the inner wall of the elongated holes 201, restricting the carrier 4 to move only in the vertical direction of the elongated holes 201 and preventing lateral displacement.

[0050] The carrier wheels 402 are installed at both ends of the cylindrical connecting part 401 and can rotate synchronously with the cylindrical connecting part 401, reducing frictional loss between the pulling member 5 and the bearing member 4. There are two pulling members 5, which are respectively wound around the carrier wheels 402 at both ends of the bearing member 4, forming a symmetrical double transmission path. The two pulling members 5 form a double-sided synchronous transmission with the bearing member 4 through the carrier wheels 402. When the bearing member 4 rises, the two carrier wheels 402 rise synchronously, driving the pulling members 5 on both sides to shorten simultaneously. When the bearing member 4 descends, the pulling members 5 on both sides extend synchronously, so that the force on both sides of the attachment frame 3 is balanced.

[0051] The two pullers 5 are respectively wrapped around the two end wheels 402 to form a synchronous pull on both sides of the attachment frame 3, so as to avoid the attachment frame 3 from tilting or getting stuck and improve the safety of operation.

[0052] In some examples, the wheel 402 has an annular receiving groove 403 machined on its outer circumference. Preferably, the width and depth of the receiving groove 403 match the diameter or thickness of the pulling member 5 (such as a steel rope, chain, or high-pressure hose). The receiving groove 403 physically restrains the pulling member 5 within the receiving groove 403, preventing the pulling member 5 from shifting laterally (such as falling off the edge of the wheel 402) during the rotation of the wheel 402 or the movement of the carrier 4. At the same time, the inner wall of the receiving groove 403 can increase the contact area between the pulling member 5 and the wheel 402, disperse local pressure, and reduce single-point wear.

[0053] In some examples, the pusher 7 has a hole through which the cylindrical connecting part 401 passes and connects to the pusher 7. Preferably, a bearing or the like can be provided between the cylindrical connecting part 401 and the pusher 7. The pusher 701 is located on the upper part of the pusher 7 and is plate-shaped, used to abut against the bottom of the carriage 2. The lower part of the pusher 7 is fixedly connected to the drive end of the lifting drive 6 (such as a hydraulic cylinder). The lifting drive 6 can directly act on the pusher 7. The pusher 7 rises and falls and synchronously drives the carrier 4 to rise and fall. The movement of the carrier 4 in the elongated hole 201 can be achieved by pulling the attachment frame 3 to rise and fall through the puller 5, while the carriage 2 remains stationary. This stroke is relatively short. When it is necessary to lift the goods to a higher height, and the independent lifting stroke of the attachment 8 is insufficient, the lifting drive 6 continues to extend, and the cylindrical connecting part 401 rises to the top or near the top of the elongated hole 201.

[0054] It is important to note that when the carrier 4 is at its lowest position within the elongated hole 201, and the attachment frame 3 and attachment 8 are at their lowest working height, the maximum distance the carrier 4 can move within the elongated hole 201 must be greater than or equal to the distance between the pusher 701 and the part of the slide 2 that is abutted by the pusher 701. This is to avoid a situation where the carrier 4 has moved to the top of the elongated hole 201 and cannot move further, and the pusher 701 has not yet abutted with the slide 2. In this case, if the lifting drive 6 (such as a hydraulic cylinder) pushes further, it will cause the pusher 7 to rise further. However, due to the restriction of the elongated hole 201, the pusher 701 cannot abut with the slide 2. In this case, the pushing of the slide 2 will rely entirely on the cylindrical connecting part 401 of the carrier 4. The cylindrical connecting part 401 may not be able to bear the load for a long time due to its low strength, which will reduce the stability during the movement and increase the wear rate of the carrier 4.

[0055] When the cylindrical connecting part 401 rises to the top or near the top of the elongated hole 201, the pushing part 701 of the pusher 7 abuts against the slide 2, driving the slide 2 to rise along the gantry 1, which in turn drives the attachment carrier 3 to rise further.

[0056] In some examples, the attachments 8 are movably mounted on the attachment carrier 3, and two attachments 8 can move toward each other to move closer or further apart. This movement can accommodate the handling needs of goods of different sizes. For example, when handling goods of different widths, the distance between the attachments 8 can be adjusted to better clamp or hold the goods.

[0057] The adjusting cylinder 9 is mounted on the attachment carrier 3, and its function is to provide power for the opposite movement of the two attachments 8. By adjusting the movement of the piston inside the adjusting cylinder 9, the two attachments 8 are pushed to move closer or further apart along the corresponding tracks on the attachment carrier 3.

[0058] In this design, the pulling component 5 is an oil pipe. One end of the oil pipe passes through the frame and connects to the oil supply equipment inside the frame, which is a fixed installation, as mentioned above, fixed to the bottom of the mast 1. The other end is connected to the oil inlet and outlet of the adjusting cylinder 9. Simultaneously, the oil pipe, as the pulling component 5, achieves the raising and lowering of the attachment carrier 3 under the action of the bearing component 4. During the raising and lowering of the attachment carrier 3, the oil pipe not only bears the tensile force but also serves to transport hydraulic oil. When the bearing component 4 moves, the oil pipe moves with it, pulling the attachment carrier 3 up and down while simultaneously delivering the oil supplied by the oil supply equipment to the adjusting cylinder 9 to control its operation.

[0059] The stacker truck is in standby mode, with the carrier 4 located at the bottom of the elongated opening 201, and the attachment frame 3 and attachments 8 at their lowest working height, maintaining a certain initial distance between the two attachments 8. The operator operates the lifting drive 6 (such as a hydraulic cylinder) to extend it and push the carrier 4 upward along the elongated opening 201 of the carriage 2.

[0060] Since one end of the oil pipe is fixed near the bottom of the gantry 1 (the relative position remains unchanged), and the other end is connected to the attachment carrier 3, the bearing member 4 rises and pulls the oil pipe, thereby driving the attachment carrier 3 to rise along the slide groove 202 of the slide 2, and the attachment 8 rises accordingly; if the height of the attachment 8 is to be lowered, the lifting drive member 6 retracts, the bearing member 4 descends, the oil pipe is released, and the attachment carrier 3 descends under the action of gravity or auxiliary device.

[0061] When the spacing between attachments 8 needs to be adjusted, the hydraulic supply system inside the frame supplies oil to the adjusting cylinder 9 via oil pipes. The hydraulic pressure drives the piston inside the adjusting cylinder 9, causing the two attachments 8 to move towards each other. For example, when moving wider goods, the hydraulic supply system increases the oil supply, and the adjusting cylinder 9 pushes the attachments 8 away from each other; when moving narrower goods, the hydraulic supply system decreases the oil supply, and the adjusting cylinder 9 moves the attachments 8 closer together. During this process, the lifting and lowering of attachments 8 and the spacing adjustment can be performed simultaneously.

[0062] If the lifting height requirement of the cargo cannot be met by the independent lifting of the attachment 8 alone, the lifting drive 6 continues to extend, and the columnar connecting part 401 rises to the top or near the top of the elongated hole 201. At this time, the pushing part 701 of the pusher 7 abuts against the slide 2, and the pushing part 701 of the pusher 7 pushes the slide 2 to rise along the gantry 1, further driving the attachment carrier 3 to rise, thereby achieving a higher cargo lifting height.

[0063] In summary, by utilizing hydraulic lines to simultaneously achieve the lifting and traction of the attachment carrier 3 and the oil supply control of the regulating cylinder 9, the number of independent components is reduced, making the overall structure of the stacker truck more compact. This integrated design not only reduces equipment costs but also reduces potential failure points and improves system reliability.

[0064] The lifting and spacing adjustment of attachment 8 can be performed simultaneously, allowing operators to adjust in real time according to the actual cargo size and handling needs during operation, greatly improving work efficiency. The spacing of attachment 8 can be adjusted by controlling the hydraulic pressure of the adjusting cylinder 9 through the internal oil supply system, making it suitable for handling cargo of various sizes and specifications, thus enhancing the versatility and adaptability of the stacker truck.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lift truck characterized by, include: Gantry (1); A slide (2) is raised and lowered on the gantry (1), and the slide (2) has a vertically arranged elongated hole (201); The attachment carrier (3) is elliptical and scissor mounted on the slide (2); The support member (4) is movably disposed in the elongated hole (201) and is located above the attachment frame (3); Pulling member (5) is flexible, with both ends lower than the bearing member (4). One end of the pulling member (5) is set on the gantry (1), and the other end passes around the bearing member (4) and is connected to the attachment frame (3).

2. A lift truck according to claim 1 wherein, The bearing member (4) includes a cylindrical connecting part (401) and a carrier wheel (402) disposed at both ends of the cylindrical connecting part (401) in the axial direction; The cylindrical connecting part (401) is movable and rotatably disposed in the elongated hole (201); There are two pulling members (5), and the two pulling members (5) are respectively wound around the two carrier wheels (402).

3. A lift truck according to claim 2 wherein, The wheel (402) has a receiving groove (403) for the pull member (5) to be wound around.

4. A lift truck according to claim 3 wherein, Also includes: A lifting drive component (6) is provided on the gantry (1) and is used to drive the bearing component (4) to move up and down. Push member (7) is rotatably connected to the cylindrical connecting part (401) and is disposed at the driving end of the lifting drive member (6). The push member (7) can rise under the drive of the lifting drive member (6).

5. A lift truck according to claim 4 wherein, The pusher (7) has a pusher (701) for abutting against the carriage (2) and pushing the carriage (2) upward.

6. A lift truck according to claim 5 wherein, The carriage (2) has a vertically arranged carriage groove (202); The attachment frame (3) is provided with a frame pulley (301), and the frame pulley (301) is movably disposed in the slide groove (202).

7. A lift truck according to claim 6 wherein, The gantry (1) has a vertically arranged gantry slot (101); The slide (2) is provided with a slide pulley (203), which is movably disposed in the gantry groove (101).

8. A lift truck according to claim 6 wherein, Two attachments (8) are movably mounted on the attachment carrier (3), and the two attachments (8) can move toward each other to move closer or further apart.

9. A lift truck according to claim 8 wherein, The attachment carrier (3) is also equipped with an adjusting cylinder (9), which is used to drive the two attachments (8) to move.

10. A lift truck according to claim 9 wherein, The pulling member (5) is an oil pipe, and the two pulling members (5) are respectively connected to the oil inlet and oil outlet of the regulating oil cylinder (9).

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