A multifunctional jib assembly suitable for a forklift truck

Abstract

This utility model belongs to the field of forklift parts technology, specifically referring to a multi-functional boom assembly suitable for forklifts. It includes a fixed frame, a movable carriage slidably connected to the front end of the fixed frame along the longitudinal direction, a movable drive source between the fixed frame and the movable carriage, three or more hook assemblies distributed circumferentially along the outer edge of the movable carriage, anti-sway brackets fixed on the left and right sides of the movable carriage, and a limiting groove formed at the bottom of the anti-sway brackets. A hook sprocket is rotatably connected to the middle of the movable carriage, and a hook chain is wound around the hook sprocket. The first end of the hook chain is connected to the hook body, and the second end is connected to the lifting drive source for transmission. This utility model can lift both box-shaped and long strip-shaped workpieces. Furthermore, through the structural cooperation of the two anti-sway brackets and their limiting grooves, the long strip-shaped workpiece is circumferentially limited during lifting, effectively solving the problem of instability when lifting long strip-shaped workpieces and significantly reducing the occurrence of safety accidents.

Description

Technical Field

[0001] This utility model belongs to the field of forklift parts technology, and specifically refers to a multi-functional boom assembly suitable for forklifts. Background Technology

[0002] Forklifts, as indispensable handling equipment in modern logistics and industrial production, are primarily used for moving palletized goods. However, standard forks prove inadequate when faced with workpieces of varying shapes and lifting requirements. Therefore, various lifting attachments are added to existing forklifts to meet the needs of lifting different workpieces. However, traditional lifting devices have significant limitations: First, they are limited in function. Because the lifting points for long, narrow workpieces (such as structural steel, pipes, and timber) differ from those for box-shaped workpieces (such as large wooden crates, cabinets, and equipment modules), lifting devices used for hooking long, narrow workpieces cannot provide stable and balanced lifting points for box-shaped workpieces. As a result, lifting devices for box-shaped workpieces can only be replaced with specialized lifting devices, which are costly, inconvenient to replace, and have low lifting efficiency. Second, when hooking long, narrow workpieces, the connection between the hook and the workpiece is usually a single point or free connection, lacking effective circumferential constraints. When traveling on uneven roads, the long, narrow workpiece is prone to circumferential rotation and large-scale swaying around its lifting point, which not only makes workpiece positioning difficult and greatly reduces handling efficiency and accuracy, but also brings serious safety hazards. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-functional boom assembly suitable for forklifts, which can lift both box-shaped and long strip-shaped workpieces. With the help of two anti-sway brackets and their limiting slots, the long strip-shaped workpieces are circumferentially limited during lifting, effectively solving the problem of instability when lifting long strip-shaped workpieces and greatly reducing the occurrence of safety accidents.

[0004] This utility model is implemented as follows: A multi-functional boom assembly suitable for forklifts includes a fixed frame at the rear end for connection and cooperation with the forklift. A movable carriage is slidably connected to the front end of the fixed frame along the longitudinal direction. A movable drive source is provided between the fixed frame and the movable carriage, which drives the movable carriage to move back and forth relative to the fixed frame. Three or more hook assemblies are distributed circumferentially on the outer edge of the movable carriage. Anti-sway brackets are fixed on the left and right sides of the movable carriage. The bottom of the anti-sway bracket has a vertically downward limiting slot, and the axes of the two limiting slots are on the same straight line. A hook sprocket is rotatably connected to the middle of the movable carriage. A hook chain is wound on the hook sprocket. The first end of the hook chain is connected to a naturally hanging hook body, and the tail end is connected to a lifting power source set on the movable carriage for transmission cooperation. The lifting power source drives the hook body to move up and down through the hook chain.

[0005] In the aforementioned multi-functional boom assembly suitable for forklifts, the left and right side walls of the fixed frame are both longitudinally provided with movable slide rails, and the left and right sides of the movable slide are both provided with movable sliders that can slide and engage with the corresponding movable slide rails. The movable drive source is a movable hydraulic cylinder, with one end of the movable hydraulic cylinder connected to the fixed frame and the other end connected to the movable slide.

[0006] In the aforementioned multi-functional boom assembly suitable for forklifts, the movable slide rail is a T-shaped through groove opened axially on a strip rail seat, the strip rail seat is welded to a fixed frame, and the opening of the T-shaped through groove is set in a horizontal direction away from the fixed frame. The movable slider is a T-shaped structure corresponding to the T-shaped through groove structure.

[0007] In the aforementioned multi-functional boom assembly suitable for forklifts, four hook assemblies are provided, and they are respectively located at the four corners of a rectangular movable carriage. Each hook assembly includes a hook chain with its top end connected to the movable carriage, and a hook body connected to the bottom end of the hook chain.

[0008] In the above-mentioned multi-functional boom assembly suitable for forklifts, the lifting path of the hook body moving up and down intersects with the projection range of the side opening of the limiting through groove. The front and rear side walls of the limiting through groove are provided with guide slopes that can guide the workpiece into the limiting through groove.

[0009] In the above-mentioned multi-functional boom assembly suitable for forklifts, the lifting power source is a power cylinder mounted on a movable carriage. The telescopic end of the power cylinder is provided with a sliding seat, which is slidably fitted on the movable carriage. A drive sprocket is rotatably connected to the sliding seat. The hook chain is wound around the drive sprocket and its tail end is fixed on the movable carriage.

[0010] In the aforementioned multi-functional boom assembly suitable for forklifts, the telescopic end of the power cylinder is arranged in a horizontal front-to-back direction, the hook sprocket is located directly below the power cylinder, and the portion of the hook chain located between the hook sprocket and the drive sprocket and the portion of the hook chain located between the drive sprocket and the tail end of the hook chain are respectively located on opposite sides above and below the power cylinder.

[0011] In the aforementioned multi-functional boom assembly suitable for forklifts, the movable carriage has a left upright plate and a right upright plate arranged opposite each other. Opening grooves are longitudinally provided on the opposite side walls of the left and right upright plates. The sliding seat is located between the left and right upright plates, and the left and right side walls of the sliding seat are provided with drive sliders that slide in the corresponding side opening grooves.

[0012] In the aforementioned multi-functional boom assembly suitable for forklifts, a slide rail groove is provided in the open slide groove. The two ends of the bottom surface of the slide rail groove are fixed to the bottom surface of the open slide groove by limiting screws. The head of the limiting screw protrudes outside the bottom surface of the slide groove. The drive slider is slidably connected in the groove of the slide rail groove, and a limiting stroke is formed between the heads of the two limiting screws to restrict the longitudinal displacement of the drive slider.

[0013] The outstanding advantages of this utility model compared to the prior art are: This utility model is reasonably designed, widely applicable, and highly economical. It can lift box-shaped workpieces and move the sliding carriage relative to the fixed frame to accommodate box-shaped workpieces of different volumes. It can also lift long strip-shaped workpieces. Through the structural cooperation of the two anti-sway brackets and their limiting through grooves, the long strip-shaped workpieces are circumferentially limited during the lifting process, effectively solving the problem of instability when lifting long strip-shaped workpieces and greatly reducing the occurrence of safety accidents. Attached Figure Description

[0014] Figure 1 This utility model is an overall three-dimensional Figure 1 ; Figure 2 This utility model is an overall three-dimensional Figure 2 ; Figure 3 This is an overall cross-sectional view of the present invention. Figure 1 ; Figure 4 This is an overall cross-sectional view of the present invention. Figure 2 .

[0015] In the diagram: 1. Fixed frame; 2. Movable slide; 3. Anti-sway bracket; 4. Limiting slot; 5. Hook sprocket; 6. Hook chain; 7. Hook body; 8. Movable slide rail; 9. Movable slider; 10. Movable cylinder; 11. Hook chain; 12. Hook body; 13. Guide slope; 14. Power cylinder; 15. Sliding seat; 16. Drive sprocket; 17. Left upright plate; 18. Right upright plate; 19. Opening slide groove; 20. Drive slider; 21. Slide rail groove; 22. Limiting screw. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4: A multi-functional boom assembly suitable for forklifts includes a fixed frame 1 at the rear end for connection and cooperation with the forklift. A movable slide 2 is slidably connected to the front end of the fixed frame 1 along the longitudinal direction. A movable drive source is provided between the fixed frame 1 and the movable slide 2, which drives the movable slide 2 to move back and forth relative to the fixed frame 1. Three or more hook assemblies are distributed circumferentially on the outer edge of the movable slide 2. Anti-sway brackets 3 are fixed on the left and right sides of the movable slide 2. The bottom of the anti-sway bracket 3 is provided with a vertically downward limiting slot 4, and the axes of the two limiting slots 4 are on the same straight line. A hook sprocket 5 is rotatably connected to the middle of the movable slide 2. A hook chain 6 is wound around the hook sprocket 5. The first end of the hook chain 6 is connected to a naturally hanging hook body 7, and the tail end is connected to a lifting power source set on the movable slide 2 for transmission cooperation. The lifting power source drives the hook body 7 to move up and down through the hook chain 6. The longitudinal positions of the movable carriage 2 and the fixed frame 1 can be adjusted according to the actual size of the workpiece being lifted, thereby further expanding the applicability of the boom assembly.

[0017] This utility model is reasonably designed, widely applicable, and highly economical. It can lift box-shaped workpieces and move the movable slide 2 relative to the fixed frame 1 to accommodate box-shaped workpieces of different volumes. It can also lift long strip-shaped workpieces. Through the structural cooperation of the two anti-sway brackets 3 and their limiting through grooves 4, the long strip-shaped workpieces are circumferentially limited during the lifting process, effectively solving the problem of instability when lifting long strip-shaped workpieces and greatly reducing the occurrence of safety accidents.

[0018] The specific fitting structure for the longitudinal sliding of the movable carriage 2 on the fixed frame 1 is as follows: Movable slide rails 8 are longitudinally arranged on both the left and right side walls of the fixed frame 1, and movable sliders 9, which can slide and engage with the corresponding movable slide rails 8, are arranged on both the left and right sides of the movable carriage 2. Simultaneously, the motion drive source can be a servo motor and a lead screw nut, but in this embodiment, the motion drive source is a movable cylinder 10, with one end connected to the fixed frame 1 and the other end connected to the movable carriage 2. To ensure that the movable carriage 2 can stably slide and engage with the movable slide rails 8 via the movable sliders 9, the movable slide rails 8 are T-shaped through slots axially formed on a strip rail base welded to the fixed frame 1, with the opening of the T-shaped through slot facing away from the fixed frame 1 in a horizontal direction. The movable sliders 9 are T-shaped structures corresponding to the T-shaped through slot structure.

[0019] Furthermore, the hook assembly comprises four hooks, each positioned at one of the four corners of the rectangular movable carriage 2. Each hook assembly includes a hook chain 11 with its top end connected to the movable carriage 2, and a hook body 12 connected to the bottom of the hook chain 11. When hoisting box-shaped workpieces, the four hook bodies 12 can be hooked at the four corners of the top surface of the box-shaped workpiece, providing multiple stable and reliable hoisting points for the box-shaped workpiece.

[0020] When the hook body 7 lifts the long strip-shaped workpiece, in order to ensure that both ends of the long strip-shaped workpiece can smoothly and stably enter the corresponding side limiting groove 4, the lifting path of the hook body 7 moving up and down intersects with the projection range of the side opening of the limiting groove 4. The front and rear side walls of the limiting groove 4 are provided with guide slopes 13 that can guide the workpiece into the limiting groove 4.

[0021] Furthermore, the hoisting power source can also employ a servo motor and lead screw nut combination structure. In this embodiment, the hoisting power source is a power cylinder 14 mounted on the movable slide 2. Simultaneously, the tail end of the hook chain 6 can be directly fixed to the telescopic end of the power cylinder 14. The telescopic movement of the power cylinder 14 directly pulls the hook chain 6, thereby achieving the vertical movement of the hook body 7. In this embodiment, the telescopic end of the power cylinder 14 is provided with a sliding seat 15, which slidably engages with the movable slide 2. A drive sprocket 16 is rotatably connected to the sliding seat 15. The hook chain 6 is wound around the drive sprocket 16, and its tail end is fixed to the movable slide 2.

[0022] The positional distribution of the hook chain 66 is optimized to ensure that the hook body 7 can be reliably driven during vertical movement. The telescopic end of the power cylinder 14 is arranged in the horizontal front-back direction. The hook sprocket 5 is located directly below the power cylinder 14. The portion of the hook chain 6 located between the hook sprocket 5 and the drive sprocket 16 and the portion of the hook chain 6 located between the drive sprocket 16 and the tail end of the hook chain 6 are respectively located on the upper and lower opposite sides of the power cylinder 14.

[0023] Furthermore, the specific structure of the sliding engagement between the sliding seat 15 and the movable carriage 2 is as follows: the movable carriage 2 is provided with a left upright plate 17 and a right upright plate 18 arranged opposite each other on the left and right sides. The opposite side walls of the left upright plate 17 and the right upright plate 18 are provided with open slide grooves 19 along the longitudinal direction. The sliding seat 15 is located between the left upright plate 17 and the right upright plate 18, and the left and right side walls of the sliding seat 15 are provided with drive sliders 20 that are slidably engaged in the corresponding side open slide grooves 19.

[0024] To prevent the drive cylinder from causing the sliding seat 15 to slide longitudinally and disengage from the open slide groove 19, a slide rail groove body 21 is provided in the open slide groove 19. The two ends of the bottom surface of the groove of the slide rail groove body 21 are respectively fixed to the bottom surface of the groove of the open slide groove 19 by limiting screws 22. The head of the limiting screw 22 protrudes outside the bottom surface of the groove of the slide rail groove body. The drive slider 20 is slidably connected in the groove of the slide rail groove body 21, and a limiting stroke is formed between the heads of the two limiting screws 22 to limit the longitudinal displacement of the drive slider 20.

[0025] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-functional boom assembly suitable for forklifts, characterized in that: The system includes a fixed frame (1) for connecting and cooperating with a forklift at its rear end. A movable carriage (2) is slidably connected to the front end of the fixed frame (1) along the longitudinal direction. A moving drive source is provided between the fixed frame (1) and the movable carriage (2), which drives the movable carriage (2) to move back and forth relative to the fixed frame (1). The outer edge of the movable carriage (2) has three or more hook assemblies distributed circumferentially. Anti-sway brackets (3) are fixed on the left and right sides of the movable carriage (2). The bottom of the anti-sway brackets (3) is... The part is provided with a vertically downward limiting through groove (4), and the axes of the two limiting through grooves (4) are on the same straight line. The middle part of the movable slide (2) is rotatably connected to a hook sprocket (5). A hook chain (6) is wound on the hook sprocket (5). The first end of the hook chain (6) is connected to a naturally hanging hook body (7), and the tail end is connected to the hoisting power source set on the movable slide (2). The hoisting power source drives the hook body (7) to move up and down through the hook chain (6).

2. The multi-functional boom assembly suitable for forklifts according to claim 1, characterized in that: The left and right side walls of the fixed frame (1) are provided with movable slide rails (8) along the longitudinal direction. The left and right sides of the movable slide (2) are provided with movable sliders (9) that can slide and cooperate on the corresponding movable slide rails (8). The moving drive source is a movable cylinder (10). One end of the movable cylinder (10) is connected to the fixed frame (1) and the other end is connected to the movable slide (2).

3. A multi-functional boom assembly suitable for forklifts according to claim 2, characterized in that: The movable slide rail (8) is a T-shaped through groove opened along the axial direction on the strip rail seat. The strip rail seat is welded to the fixed frame (1), and the slot of the T-shaped through groove is set in a horizontal direction away from the fixed frame (1). The movable slider (9) is a T-shaped structure corresponding to the T-shaped through groove structure.

4. A multi-functional boom assembly suitable for forklifts according to claim 1, characterized in that: The hook assembly is provided in four parts, and is respectively located at the four corners of the rectangular movable slide (2). Each hook assembly includes a hook chain (11) with its top end connected to the movable slide (2), and a hook body (12) is connected to the bottom of the hook chain (11).

5. A multi-functional boom assembly suitable for forklifts according to claim 1, characterized in that: The lifting path of the hook body (7) moves up and down intersects with the projection range of the side opening of the limiting groove (4). The front and rear side walls of the limiting groove (4) are provided with guide slopes (13) that can guide the workpiece into the limiting groove (4).

6. A multi-functional boom assembly suitable for forklifts according to claim 1, characterized in that: The power source for the hoisting motion is a power cylinder (14) installed on the movable slide (2). The telescopic end of the power cylinder (14) is provided with a sliding seat (15). The sliding seat (15) is slidably fitted on the movable slide (2), and a drive sprocket (16) is rotatably connected to the sliding seat (15). The hook chain (6) is wound around the drive sprocket (16) and its tail end is fixed on the movable slide (2).

7. A multi-functional boom assembly suitable for forklifts according to claim 6, characterized in that: The telescopic end of the power cylinder (14) is arranged in the horizontal front-back direction. The hook sprocket (5) is located directly below the power cylinder (14). The part of the hook chain (6) located between the hook sprocket (5) and the drive sprocket (16) and the part of the hook chain (6) located between the drive sprocket (16) and the tail end of the hook chain (6) are respectively located on the upper and lower opposite sides of the power cylinder (14).

8. A multi-functional boom assembly suitable for forklifts according to claim 6 or 7, characterized in that: The movable slide (2) has a left upright plate (17) and a right upright plate (18) arranged opposite each other. Opening grooves (19) are provided longitudinally on the opposite side walls of the left upright plate (17) and the right upright plate (18). The sliding seat (15) is located between the left upright plate (17) and the right upright plate (18), and the left and right side walls of the sliding seat (15) are provided with driving sliders (20) that slide in the corresponding side opening grooves (19).

9. A multi-functional boom assembly suitable for forklifts according to claim 8, characterized in that: The open slide groove (19) is provided with a slide rail groove body (21). The two ends of the groove bottom surface of the slide rail groove body (21) are fixed to the groove bottom surface of the open slide groove (19) by limiting screws (22). The head of the limiting screw (22) protrudes outside the groove bottom surface of the slide groove body. The drive slider (20) is slidably connected in the groove of the slide rail groove body (21), and the heads of the two limiting screws (22) form a limiting stroke that restricts the longitudinal displacement of the drive slider (20).

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