Quick-mounting type lifting boom for fork lift truck

Abstract

The utility model relates to a kind of fast-mounting type hoisting boom for fork truck, including fork carriage and the additional rack fixed on fork carriage, two oppositely arranged main arms are installed on the additional rack, the main arm is inverted L-shaped hollow structure, front support beam is fixedly connected between the horizontal section of two main arms, middle beam is fixedly connected on the front support beam, the hanger plate is installed in the lower end of the middle beam, the horizontal section upper end of the main arm is fixedly connected with lifting lug, frame steel pipe is fixedly connected between the vertical section of two main arms.The utility model can be hoisting boom accessory fast-mounting quick-change, improve the overall use efficiency of fork truck, meet the demand of market to fork truck diversification operation, and improve hoisting stability by double-hoisting-point design.

Description

Technical Field

[0001] This utility model relates to the field of forklift attachment technology, specifically a quick-release lifting boom for forklifts. Background Technology

[0002] In recent years, forklifts, as a general-purpose material handling equipment, have been widely used in logistics, manufacturing, ports, and other fields. With increasing demands for logistics efficiency, forklifts often need to switch between different attachments in a short period to meet diverse operational needs (such as lifting steel during the day and loading / unloading containers at night). Among these attachments, the crane boom is a crucial component, used for lifting heavy or irregularly shaped goods (such as timber, steel, and large packages).

[0003] Currently, most forklift booms are telescopic or truss-type, typically fixed to the forklift by welding or bolting. Bolted attachments require multiple people to install and remove, and are time-consuming, impacting the forklift's continuous operation efficiency. Welded attachments cannot be disassembled, resulting in limited forklift functionality and low equipment utilization. Furthermore, existing forklift booms generally employ a single-point lifting structure, consisting of a single main beam and a welded frame. Under heavy loads, uneven stress can cause tilting or even structural deformation, resulting in insufficient lifting stability.

[0004] Therefore, there is an urgent need for a quick-assembly lifting boom for forklifts that can quickly assemble and disassemble boom attachments while stably and safely completing lifting tasks. Utility Model Content

[0005] The purpose of this utility model is to provide a quick-assembly lifting boom for forklifts to solve the problems mentioned in the background art, so as to achieve the purpose of quickly assembling and disassembling lifting boom attachments and safely and stably completing lifting tasks.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A quick-assembly lifting boom for forklifts includes a fork carriage and an mounting frame fixed to the fork carriage. Two opposing main booms are mounted on the mounting frame. The main booms are inverted L-shaped hollow structures. A front support beam is fixedly connected between the horizontal sections of the two main booms. A middle beam is fixedly connected to the front support beam. A hook plate is installed at the lower end of the middle beam. Lifting lugs are fixedly connected to the upper ends of the horizontal sections of the main booms. A frame steel pipe is fixedly connected between the vertical sections of the two main booms.

[0008] As a further solution of this utility model: In order to improve the efficiency of fixing the main arm to the mounting frame, a pin hole is opened on the vertical section side wall of the main arm. After the fastener passes through the mounting frame and the pin hole in sequence, the main arm is fixed to the mounting frame.

[0009] As a further embodiment of this utility model: in order to limit and fix the main arm and assist the pin hole to quickly align with the corresponding hole of the mounting frame, an upper hook assembly is fixedly connected to the upper end of the vertical section of the main arm, and a lower hook is fixedly connected to the lower end of the vertical section of the main arm; the upper hook assembly and the lower hook are respectively connected to the upper edge and the lower crossbeam of the mounting frame.

[0010] As a further embodiment of this utility model: In order to facilitate the vertical positioning of the main arm, the upper hook assembly includes an upper plate, a middle plate and a lower plate welded together as a whole. The upper plate has a U-shaped structure and is embedded in the main arm. The middle plate and the lower plate are welded together to form a stepped positioning structure, which is used to limit the upper edge of the mounting frame.

[0011] As a further embodiment of this utility model: in order to enhance the structural strength of the main arm, a support plate is installed inside the main arm, and a reinforcing bending plate is installed at the inner bend of the main arm.

[0012] As a further solution of this utility model: In order to avoid insufficient locking strength of the first pin hole, a hook plate is installed inside the main arm, and the hook plate is provided with a second pin hole corresponding to the first pin hole, which is used to strengthen the connection between the main arm and the mounting frame.

[0013] As a further embodiment of this utility model: In order to ensure the stability of the front support beam fixed on the main arm, the main arm is provided with a plug-in part, and both ends of the front support beam are plugged into the plug-in part, and at least two front support beams are provided.

[0014] As a further embodiment of this utility model: in order to stably fix the middle beam to the front support beam, a through hole is provided on the middle beam, the front support beam passes through the through hole, and the middle beam is fixed at the middle position of the front support beam.

[0015] As a further embodiment of this utility model: in order to make the frame steel pipe more firmly welded to the main arm and the support of the frame steel pipe more stable, at least two frame steel pipes are provided, and the two ends of the frame steel pipes are designed with chamfers.

[0016] As a further embodiment of this utility model: in order to prevent the front support beam from being corroded and thus affecting the structural strength, cover plates are fixedly connected to both ends of the front support beam.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model has a novel structure. Because a pin hole is provided on the side of the main boom, the main boom can be fixed to the mounting frame by inserting a pin into the pin hole, which allows the lifting boom to be quickly assembled and disassembled. In addition, the pin hole on the hook plate inside the main boom strengthens the connection structure between the main boom and the mounting frame.

[0019] Because the vertical section of the main boom is equipped with an upper hook assembly and a lower hook, the main boom can be fixed on the mounting frame while the pin hole is quickly aligned with the corresponding hole on the mounting frame through the limiting mechanism, which facilitates the improvement of installation efficiency.

[0020] The support plates installed inside the main boom and the reinforcing bending plates installed at the inner bend of the main boom enhance the structural strength of the main boom, increasing the lifting capacity of the crane boom. Furthermore, the two hook plates installed at the lower end of the center beam allow for dual-point lifting of goods. The dual hook plates ensure even distribution of the cargo's center of gravity, reducing the risk of uneven loading, improving lifting stability, and ensuring the safety of goods and personnel. The lifting points can also be selected according to the actual size or location of the goods, improving operational efficiency.

[0021] The mounting bracket used in this utility model is an existing one. This application only uses it in this application and does not involve any improvement to its structure or working principle. Therefore, it will not be described in detail here. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is an isometric drawing of the present invention;

[0024] Figure 3 This is the front view of the present invention;

[0025] Figure 4 This is a schematic diagram of the main arm of this utility model;

[0026] Figure 5 This is a cross-sectional view of the main arm of this utility model;

[0027] Figure 6 This is an isometric view of the front support beam of this utility model;

[0028] Figure 7 This is an isometric drawing of the cover plate of this utility model;

[0029] Figure 8 This is a structural schematic diagram of the central beam and hook plate of this utility model;

[0030] Figure 9 This is an isometric drawing of the frame steel pipe of this utility model;

[0031] Figure 10This is a schematic diagram of the upper hook assembly of this utility model;

[0032] Figure 11 This is an isometric view of the lower hook of this utility model;

[0033] Figure 12 This is an isometric drawing of the lifting lug of this utility model;

[0034] Figure 13 This is a front view of the crane boom and fork carriage assembled according to this utility model.

[0035] Figure 14 This is a rear view of the crane boom and fork carriage assembled according to this utility model;

[0036] In the diagram: 1-Main boom, 11-Pin hole one, 12-Plug-in part, 13-Support plate, 14-Reinforcing bent plate, 15-Hook plate, 151-Pin hole two, 2-Front support beam, 21-Cover plate, 3-Middle beam, 31-Hook plate, 32-Through hole, 33-Support plate, 4-Frame steel pipe, 5-Upper hook assembly, 51-Upper plate, 52-Middle plate, 53-Lower plate, 6-Lower hook, 7-Lifting lug, 8-Additional frame, 9-Forklift carriage. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations.

[0039] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] Please see Figure 1-14 In this embodiment of the present invention, a quick-assembly lifting boom for forklifts includes a fork carriage 9 and an mounting frame 8 fixed to the fork carriage 9. Two opposing main booms 1 are mounted on the mounting frame 8. Each main boom 1 has an inverted L-shaped hollow structure, with its vertical section perpendicular to the ground and its horizontal section extending away from the fork carriage 9. A pin hole 11 is provided on the side wall of the vertical section of the main boom 1. In this practical embodiment, a pin is used as the fixing component; that is, a pin passes through the mounting frame 8 and the pin hole 11 to fix the main boom 1 to the mounting frame 8, achieving quick fixing of the main boom 1 to the mounting frame 8. A support plate 13 is welded inside the main boom 1, and a reinforcing bending plate 14 is welded to the inner bend of the main boom 1 to enhance the structural strength of the main boom 1 and increase the load capacity of the lifting boom. The main arm 1 is also welded with a hook plate 15. The hook plate 15 has a second pin hole 151 at the position corresponding to the first pin hole 11, which is used to enhance the structural strength of the connection between the main arm 1 and the mounting frame 8. The pin passes through the corresponding hole, the first pin hole 11 and the second pin hole 151 on the mounting frame 8 in sequence, and fixes the main arm 1 on the mounting frame 8.

[0041] Specifically, the quick-release lifting boom of this forklift includes a fork carriage and an add-on frame. The fork carriage is a standard component of the forklift and is used to carry goods. The add-on frame is fixed to the fork carriage and serves as the base structure for mounting the lifting boom. The add-on frame is made of steel and has sufficient strength and rigidity to withstand various loads generated during lifting operations.

[0042] The upper hook assembly 5 is welded to the upper end of the vertical section of the main boom 1 on the side near the mounting frame 8. Two side plates are installed on the upper end of the mounting frame 8, and a connecting plate is installed between the two side plates. Please refer to [link / reference]. Figure 10The upper hook assembly 5 includes an upper plate 51, a middle plate 52, and a lower plate 53 welded together as a whole. The upper plate 51 has a U-shaped structure, and its U-shaped opening wraps around the upper edge of the main boom 1 for mounting and fixing the main boom 1. The width of the upper plate 51 is greater than the distance between the two side plates at the upper end of the mounting frame 8, so that the upper plate 51 can abut against the upper edge of the mounting frame 8 to limit the main boom 1 in the vertical direction, help the pin hole 11 to quickly align with the corresponding hole in the mounting frame 8 in the vertical direction, and also serve to support the lifting boom. The middle plate 52 is welded to the lower edge of the upper plate 51 near the mounting frame 8, and the lower plate 53 is welded to the lower edge of the middle plate 52 near the mounting frame 8. The length of the lower plate 53 is less than the length of the middle plate 52, so that the middle plate 52 and the lower plate 53 form a stepped limiting structure through welding, so that the upper hook assembly 5 can be hooked onto the connecting plate at the upper end of the mounting frame 8. At the same time, the width of the middle plate 52 and the lower plate 53 is less than the distance between the two side plates at the upper end of the mounting frame 8, so that the middle plate 52 and the lower plate 53 can be fixed between the two side plates at the upper end of the mounting frame 8 to limit and fix the main arm 1 in the horizontal direction.

[0043] A lower hook 6 is welded to the lower end of the vertical section of the main boom 1 near the mounting frame 8. A crossbeam is installed between the two sides of the lower end of the mounting frame 8. The lower hook 6 is hooked to the lower crossbeam of the mounting frame 8 to further constrain the vertical displacement of the main boom 1. The main boom 1 is hooked to the mounting frame 8 through the upper hook assembly 5 and the lower hook 6 to ensure accurate positioning and structural stability of the main boom 1 during rapid installation.

[0044] A frame steel pipe 4 is welded between the vertical sections of the two main booms 1. The ends of the frame steel pipe 4 are chamfered to make the weld between the frame steel pipe 4 and the main boom 1 stronger and reduce the risk of incomplete penetration. In this embodiment, two frame steel pipes 4 are used. A lifting lug 7 is welded to the upper end of the horizontal section of the main boom 1, allowing the entire crane boom to be transported and unloaded through the lifting lug 7, improving the efficiency and safety of crane boom transportation and unloading.

[0045] In this embodiment, two front support beams 2 are provided. Through holes 32 are respectively opened at both ends of the side wall of the middle beam 3. The front support beam 2 passes through the through holes 32 and fixes the middle beam 3 at the middle position of the front support beam 2, ensuring even force distribution when the crane boom lifts goods. The connection joint between the front support beam 2 and the middle beam 3 is welded to increase the stability of the middle beam 3 fixed to the front support beam 2. The diameter of the through hole 32 matches the outer diameter of the front support beam 2, ensuring that the front support beam 2 tightly passes through the through hole 32. In this embodiment, the front support beam 2 is made of formed steel pipe.

[0046] The horizontal section of the main boom 1 has a connector 12 on its side wall. The two ends of the front support beam 2 are respectively inserted into the connectors 12 of the two main booms 1. The joints at both ends of the front support beam 2 are welded to enhance the connection strength between the front support beam 2 and the main boom 1. The connector 12 can be a groove on the inner side wall of the main boom 1 or a through hole penetrating the side wall of the main boom 1. In this embodiment, the connector 12 is a through hole. Cover plates 21 are welded to both ends of the front support beam 2 to prevent rainwater and other dirt from entering the front support beam 2 and causing corrosion. The middle beam 3 is a hollow structure, and support plates 33 are welded inside the middle beam 3 to enhance its structural strength. Hook plates 31 are welded to the lower end of the middle beam 3 along its length. Two hook plates 31 are provided, forming a double-lifting-point design to increase the lifting stability of the crane boom.

[0047] This utility model features a novel structure and stable operation. In use, firstly, the other attachments on the fork carriage 9 are removed from the mounting frame 8. Then, the entire lifting boom is hoisted onto the mounting frame 8 using the lifting lugs 7. The upper plate 51 of the upper hook assembly 5 is pressed against the edges of the upper side plates of the mounting frame 8, allowing the upper hook assembly 5 and the lower hook 6 to hook onto the edge of the upper connecting plate and the lower crossbeam of the mounting frame 8, respectively, thus positioning the main boom 1. This aligns the first pin hole 11 with the hole on the mounting frame 8. Then, a pin is passed through the holes, first pin hole 11, and second pin hole 151 on the mounting frame 8 in sequence to further secure the main boom 1 to the mounting frame 8. This completes the installation of the lifting boom. Finally, the goods are hoisted using the two hook plates 31 at the lower end of the middle beam 3, completing the hoisting operation.

[0048] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0049] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A quick-assembly lifting boom for forklifts, comprising a fork carriage (9) and an mounting bracket (8) fixed to the fork carriage (9), characterized in that: The mounting frame (8) is equipped with two opposing main booms (1), each of which is an inverted L-shaped hollow structure. A front support beam (2) is fixedly connected between the horizontal sections of the two main booms (1), and a middle beam (3) is fixedly connected to the front support beam (2). A hook plate (31) is installed at the lower end of the middle beam (3). A lifting lug (7) is fixedly connected to the upper end of the horizontal section of the main boom (1). A frame steel pipe (4) is fixedly connected between the vertical sections of the two main booms (1).

2. The quick-assembly lifting boom for forklifts according to claim 1, characterized in that: The vertical section of the main arm (1) has a pin hole (11) on its side wall. The main arm (1) is fixed to the mounting frame (8) by passing the fastener through the mounting frame (8) and the pin hole (11) of the main arm (1) in sequence.

3. The quick-assembly lifting boom for forklifts according to claim 1, characterized in that: The upper end of the vertical section of the main arm (1) is fixedly connected to an upper hook assembly (5), and the lower end of the vertical section of the main arm (1) is fixedly connected to a lower hook (6); the upper hook assembly (5) and the lower hook (6) are respectively connected to the upper edge and the lower beam of the mounting frame (8).

4. A quick-assembly lifting boom for forklifts according to claim 3, characterized in that: The upper hook assembly (5) includes an upper plate (51), a middle plate (52) and a lower plate (53) welded together as a whole. The upper plate (51) has a U-shaped structure and is embedded in the main arm (1). The middle plate (52) and the lower plate (53) are welded together to form a stepped limiting structure, which is used to limit the upper edge of the mounting frame (8).

5. A quick-assembly lifting boom for forklifts according to claim 1, characterized in that: A support plate (13) is installed inside the main boom (1), and a reinforcing bending plate (14) is installed at the inner bend of the main boom (1).

6. A quick-assembly lifting boom for forklifts according to claim 2, characterized in that: The main arm (1) is equipped with a hook plate (15), and the hook plate (15) has a second pin hole (151) corresponding to the first pin hole (11) to strengthen the connection between the main arm (1) and the mounting frame (8).

7. A quick-assembly lifting boom for forklifts according to claim 1, characterized in that: The main arm (1) is provided with a plug-in part (12), and the two ends of the front support beam (2) are plugged into the plug-in part (12). At least two front support beams (2) are provided.

8. A quick-assembly lifting boom for forklifts according to claim 1, characterized in that: The middle beam (3) has a through hole (32), the front support beam (2) passes through the through hole (32), and fixes the middle beam (3) in the middle position of the front support beam (2).

9. A quick-assembly lifting boom for forklifts according to claim 1, characterized in that: At least two frame steel pipes (4) are provided, and both ends of the frame steel pipes (4) are chamfered.

10. A quick-assembly lifting boom for forklifts according to claim 1, characterized in that: The front support beam (2) is fixedly connected to cover plates (21) at both ends.

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