An aluminum rod conveying system

Abstract

This invention relates to the field of bar conveying technology, and discloses an aluminum bar conveying system, including two inclined rails, two flat-end A-frames, a drive unit, and a conveying wheel. Each flat-end A-frame is equipped with a lifting drive structure, and a lifting hook is fixed to the lifting drive structure. A guide rail is installed at the top of the inclined rails, and the lowest point of the guide rail is higher than the conveying wheel. The aluminum bar rolls down onto the conveying wheel via the guide rail. Several stress-relieving positioning plates are rotatably connected between the guide rail and the conveying wheel. The addition of the guide rail increases the smoothness of the aluminum bar before it enters the conveying wheel. Simultaneously, increasing the width of the support increases structural stability. The stress-relieving positioning plates relieve stress on the aluminum bar and smoothly guide it to the conveying wheel, solving the problem that in closed-loop conveying structures, the aluminum bar cannot smoothly enter the conveying wheel when the lifting hook angle is reversed. This allows the aluminum bar to move at a uniform speed at the guide rail or always remain within a controllable range of motion.

Description

Technical Field

[0001] This invention relates to the field of bar conveying technology, specifically an aluminum bar conveying system. Background Technology

[0002] In the aluminum extrusion process, aluminum bars of equal length need to be fed into the preheating furnace or extrusion production line in sequence. After preheating, the aluminum bars are pushed by the extrusion mechanism for extrusion molding.

[0003] The aluminum rods are solid structures. During the extrusion molding process, the large length and diameter of the aluminum rods result in heavy weight. The aluminum rods are arranged sequentially on the platform and lifted to the target height by the conveying mechanism. The rollers control the aluminum rods to be conveyed along their own axis to the preheating furnace or extrusion production line.

[0004] The most commonly used type of aluminum rod conveying mechanism is the circulating aluminum rod conveying mechanism. Its principle is to use a closed-loop continuous power structure, such as a sprocket or chain structure, to fix the bracket with the chain as the carrier. The bracket rotates to the bottom of the aluminum rod and is lifted. When the bracket is lifted, the aluminum rod is placed onto the conveying roller.

[0005] The conveyor roller is supported and raised by a bracket. When the bracket rotates at an angle, the aluminum rod tends to separate from the bracket. If the conveyor roller is too close to the bracket, the bracket cannot fully guide the aluminum rod to the conveyor roller, thus preventing the aluminum rod from moving to the conveyor roller under guidance and control. This results in uncontrollable kinetic energy of the aluminum rod on the conveyor roller. Furthermore, the bracket has a narrow distance from the conveyor roller and a high center of gravity. When subjected to a horizontal force and a longitudinal lever arm greater than the horizontal lever arm, the bracket tends to overturn. This uneven stress on the bracket increases the risk of material fatigue and breakage over time. Summary of the Invention

[0006] The purpose of this invention is to provide an aluminum rod conveying system, which adds a guide rail to increase the smoothness of the aluminum rod before it enters the conveying wheel. At the same time, it increases the width of the support and increases the structural stability. Meanwhile, the stress-relieving positioning plate relieves the stress on the aluminum rod and smoothly guides it to the conveying wheel. The stress relief behavior occurs in the middle of the support, reducing the impact on the support material and achieving smooth conveying, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An aluminum rod conveying system includes two inclined rails, two flat-end A-frames, a drive unit, and a conveying wheel. Each flat-end A-frame is equipped with a lifting drive structure, and a lifting hook is fixed on the lifting drive structure. The lifting hook lifts the aluminum rods on the inclined rails to the conveying wheel. The conveying wheel is driven to rotate by the drive unit, and the conveying wheel conveys the aluminum rods axially into a preheater. A conveying bracket is fixedly connected to the side of the flat-end A-frame away from the inclined rails. The conveying wheel and the drive unit are mounted on the top of the conveying bracket.

[0009] A guide rail is installed on the top of the placement rail. The lowest point of the guide rail is higher than the conveyor wheel. The aluminum rod rolls down to the conveyor wheel through the guide rail. Several unloading positioning plates are rotatably connected between the guide rail and the conveyor wheel.

[0010] As a further embodiment of the present invention: the side of the unloading positioning plate is provided with a limiting arc surface, the arc surface of the limiting arc surface is opposite to the arc surface of the lifting hook, the rotation direction of the unloading positioning plate is forward and reverse, and the width of the unloading positioning plate gradually increases from the rotation center to the limiting arc surface.

[0011] As a further embodiment of the present invention: the placement inclined rail and the flat-end A-frame are fixedly connected by a reverse inclined surface.

[0012] As a further embodiment of the present invention: the two ends of the top surface of the guide rail extend to the top of the shaft seat of the lifting drive structure and the shaft seat of the conveying wheel, respectively.

[0013] As a further embodiment of the present invention: the arc-shaped concave surface of the conveyor wheel is attached with a rubber layer, which is composed of multiple rubber sheets joined together with gaps.

[0014] As a further aspect of the present invention: the end of the lifting hook away from the lifting drive structure has a pointed tip, and the width of the lifting hook gradually decreases from the lifting drive structure toward the pointed tip.

[0015] As a further embodiment of the present invention: the unloading positioning plate rotates clockwise until the limiting arc surface corresponds to the arc-shaped concave surface of the conveying wheel, and the highest point of the tangent surface of the unloading positioning plate and the arc surface of the limiting arc surface is flush with the lowest point of the guide rail.

[0016] As a further embodiment of the present invention: the unloading positioning plate rotates counterclockwise, the vertical distance between the tip of the limiting arc surface and the guide rail is not less than the diameter of the aluminum rod, and when the aluminum rod separates from the lifting hook and enters the guide rail, the aluminum rod is located at the angle between the guide rail and the unloading positioning plate.

[0017] The rotating part of the unloading positioning plate is provided with an elastic element, which can be a torsion spring or a tension spring. When the unloading positioning plate is in a static state, the angle between the unloading positioning plate and the guide rail is less than 90 degrees, and the unloading positioning plate is not perpendicular to the horizontal plane.

[0018] The unloading positioning plate is driven to rotate by a power drive component.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] Adding a guide rail increases the smoothness of the aluminum rod before it enters the conveyor wheel. At the same time, increasing the width of the support increases the structural stability. The unloading positioning plate unloads the aluminum rod and smoothly guides it to the conveyor wheel. The unloading behavior occurs in the middle of the support, reducing the impact on the support material. It also solves the problem that the aluminum rod cannot smoothly enter the conveyor wheel when the lifting hook angle is reversed in the closed-loop conveyor structure, so that the aluminum rod can move at a constant speed at the guide rail or always stay within a controllable range of motion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional schematic diagram of an aluminum rod conveying system;

[0023] Figure 2 A top view schematic diagram of an aluminum rod conveying system;

[0024] Figure 3 A schematic front view of an aluminum rod conveying system;

[0025] Figure 4 A three-dimensional schematic diagram of the unloading positioning plate after rotation in an aluminum rod conveying system;

[0026] Figure 5 A schematic diagram illustrating the use of a force-relieving positioning plate in an aluminum rod conveying system;

[0027] Figure 6 A schematic diagram of the flat position of a force-relieving positioning plate in an aluminum rod conveying system;

[0028] Figure 7 This is a schematic diagram of an aluminum rod in an unguided state.

[0029] Figure 8 A schematic diagram of the tangential angle of the conveyor wheel in the trajectory of the aluminum rod;

[0030] In the diagram: 1. Placing inclined rail; 11. Reverse inclined surface; 2. Flat-end A-frame; 21. Lifting drive structure; 22. Lifting hook; 221. Pointed end; 3. Guide inclined rail; 4. Conveying bracket; 5. Drive unit; 6. Unloading positioning plate; 61. Limiting arc surface; 7. Conveying wheel. Detailed Implementation

[0031] Please see Figures 1-8 In this embodiment:

[0032] It includes two inclined rails 1, two flat-end A-frames 2, a drive unit 5, and a conveyor wheel 7. Each flat-end A-frame 2 is equipped with a lifting drive structure 21, and a lifting hook 22 is fixed on the lifting drive structure 21. The lifting hook 22 lifts the aluminum rod on the inclined rail 1 to the conveyor wheel 7. The conveyor wheel 7 is driven to rotate by the drive unit 5 and conveys the aluminum rod axially into the preheater.

[0033] The length of the aluminum rod is greater than the distance between the two inclined rails 1. Both ends of the aluminum rod protrude from the opposite sides of the two inclined rails 1. A lifting drive structure 21 is installed on the flat-end A-frame 2. The lifting drive structure 21 is a closed-loop drive structure, such as a combination of sprockets and chains. Simultaneously, the lifting hook 22 can be paired with the flat-end A-frame 2 using a sliding guide structure to ensure the stability of the lifting hook 22's posture. The lifting hook 22 rotates to below the inclined rails 1, hooks the aluminum rod, and lifts it upwards. The drive unit 5 is a multi-linkage transmission structure that drives multiple conveyor wheels 7 to rotate in the same direction and is driven by a motor.

[0034] To address the issue that the lifting hook 22 cannot directly guide the aluminum rod into the conveyor wheel 7, and to resolve the material fatigue problem caused by the kinetic energy impact below the conveyor wheel 7 resulting in a raised frame and a high center of gravity, the following improvements are made:

[0035] The improvements are as follows: A conveying bracket 4 is fixedly connected to the side of the flat-end A-frame 2 away from the placement inclined rail 1. The conveying wheel 7 and the drive unit 5 are installed on the top of the conveying bracket 4. A guide rail 3 is installed on the top of the placement inclined rail 1. The lowest point of the guide rail 3 is higher than the conveying wheel 7. The aluminum rod rolls down to the conveying wheel 7 through the guide rail 3. Several unloading positioning plates 6 are rotatably connected between the guide rail 3 and the conveying wheel 7. A limiting arc surface 61 is opened on the side of the unloading positioning plate 6. The arc surface of the limiting arc surface 61 is opposite to the arc surface of the lifting hook 22. The rotation direction of the unloading positioning plate 6 is forward and reverse, and the width of the unloading positioning plate 6 gradually increases from the rotation center to the limiting arc surface 61.

[0036] After the lifting hook 22 lifts the aluminum rod, the angle of the lifting hook 22 changes, and the aluminum rod first falls onto the guide rail 3. Because the tangent of the arc surface of the conveyor wheel 7 makes a large angle with the horizontal direction, see details... Figure 8Therefore, a slight slope is used to guide the transition via the guide rail 3. The aluminum rod slides towards the conveyor wheel 7 at the guide rail 3, and the unloading positioning plate 6 rotates counterclockwise, or reverses direction. The unloading positioning plate 6 reverses to above the guide rail 3, and the vertical distance between the tip of the limiting arc surface 61 and the guide rail 3 is not less than the diameter of the aluminum rod. When the aluminum rod separates from the lifting hook 22 and enters the guide rail 3, the aluminum rod is located at the angle between the guide rail 3 and the unloading positioning plate 6. At this time, the aluminum rod rotates clockwise, or rotates forward. The kinetic energy of the aluminum rod at the guide rail 3 is applied to the unloading positioning plate 6, and as the angle between the unloading positioning plate 6 and the guide rail 3 gradually expands, the aluminum rod can move at a uniform speed at the guide rail 3 or always remain within a controllable range of motion, avoiding the problem of strong impact on the conveyor wheel 7 caused by the gradual increase of the kinetic energy of the aluminum rod.

[0037] The force exerted by the aluminum rod on the unloading positioning plate 6 is applied to the rotating structure of the unloading positioning plate 6. When there are multiple unloading positioning plates 6, as the unloading positioning plates 6 rotate on the shaft, the kinetic energy exerted by the aluminum rod on the unloading positioning plate 6 is applied to the connection between the unloading positioning plate 6 and the shaft. Therefore, the width of the unloading positioning plate 6 gradually increases from the rotation center to the limiting arc surface 61, which can ensure structural strength while also providing further guidance, as detailed below:

[0038] The unloading positioning plate 6 rotates clockwise until the limiting arc surface 61 corresponds to the arc-shaped concave surface of the conveyor wheel 7. At this point, the highest point of the tangent surface between the unloading positioning plate 6 and the arc surface 61 is flush with the lowest point of the guide rail 3.

[0039] Please see Figure 6 When the unloading positioning plate 6 is lying flat, the highest point of the tangent surface between the unloading positioning plate 6 and the arc surface of the limiting arc surface 61 is flush with the lowest point of the guide inclined rail 3. The unloading positioning plate 6 rotates along with the movement of the aluminum rod. Finally, the unloading positioning plate 6 is guided to the conveyor wheel 7 through the inclined surface. Throughout the process, the unloading positioning plate 6 is in contact with the aluminum rod. It is precisely because of the contact between the unloading positioning plate 6 and the aluminum rod that the unloading positioning plate 6 can always control the movement trajectory of the aluminum rod, thereby avoiding the aluminum rod from impacting the conveyor wheel 7.

[0040] Furthermore, a rubber layer is attached to the arc-shaped concave surface of the conveyor wheel 7. This rubber layer consists of multiple rubber sheets joined together with gaps. To increase friction with the aluminum rod, the conveyor wheel 7 uses the rubber layer to press against the aluminum rod, thus increasing friction. However, the rubber layer has a drawback: if the aluminum rod impacts the conveyor wheel 7, it will deform. Since the rubber layer lacks rigidity, the aluminum rod, under the influence of kinetic energy, deforms along with the rubber layer, making it easy for the aluminum rod to roll out of the concave surface of the conveyor wheel 7. Therefore, the rigid restraint of the aluminum rod by the limiting arc surface 61 can avoid this problem. The gaps between the multiple rubber sheets prevent the entire rubber sheet from being squeezed when deformed, avoiding the problem of the closed-loop rubber separating from the inner cylinder of the conveyor wheel 7 under impact. During conveying, the unloading positioning plate 6 can rotate clockwise to prevent axial friction between the unloading positioning plate 6 and the aluminum rod.

[0041] The inclined rail 1 and the flat-end A-frame 2 are fixedly connected by the anti-sloping surface 11. Please refer to [link / reference]. Figure 3 During mass production, the number of aluminum bars placed above the inclined rail 1 is continuously replenished. The advantage of setting the reverse inclined surface 11 is that the kinetic energy influence of the rear aluminum bars on the front aluminum bars can be used to raise the height of the front aluminum bars and bring them closer to the lifting hook 22. This allows the lifting hook 22 to shorten the height of the aluminum bars by power lifting, thus reducing energy consumption.

[0042] The top surfaces of the guide rail 3 extend to the top of the shaft seats of the lifting drive structure 21 and the shaft seats of the conveying wheel 7, respectively.

[0043] When the top surface of the guide rail 3 extends above the shaft seat of the lifting drive structure 21, the lifting hook 22 rotates above the guide rail 3. The distance between the bottom surface of the inner diameter of the lifting hook 22 and the surface of the guide rail 3 is reduced, which reduces the influence of kinetic energy. At the same time, the distance between the bottom end of the guide rail 3 and the conveying wheel 7 is shortened, so that the stroke of the guide rail 3 and the unloading positioning plate 6 is longer.

[0044] The lifting hook 22 has a pointed end 221 at the end away from the lifting drive structure 21, and the width of the lifting hook 22 gradually decreases from the lifting drive structure 21 to the pointed end 221.

[0045] Please see Figure 3 The pointed end 221 can reduce the impact of subsequent aluminum bars on the lifting hook 22 during the lifting process of the bottom aluminum bar. When the end of the lifting hook 22 has width, during the lifting process, subsequent aluminum bars are likely to act on the end corner of the lifting hook 22, causing the lifting hook 22 to get stuck.

[0046] An elastic element is provided at the rotating part of the unloading positioning plate 6. The elastic element can be a torsion spring or a tension spring. In the static state, the angle between the unloading positioning plate 6 and the guide rail 3 is less than 90 degrees, and the unloading positioning plate 6 is not perpendicular to the horizontal plane. The elastic element unloads the aluminum rod, reducing the kinetic energy of the aluminum rod entering the conveyor wheel 7. The advantage is that it reduces the application of additional energy. The disadvantage is that the movement speed of the aluminum rod on the guide rail 3 is uneven.

[0047] The unloading positioning plate 6 is driven to rotate by a power drive component. The drive component unloads force while simultaneously driving the unloading positioning plate 6 to rotate. The aluminum rod always remains in contact with the unloading positioning plate 6, and the aluminum rod is always in a controllable state. The movement speed of the aluminum rod can be controlled by driving the unloading positioning plate 6 to rotate by the drive component. The advantage is that the control is more stable, but the disadvantage is that additional energy is wasted.

[0048] Both can be chosen based on the actual situation and needs.

[0049] To elaborate further, since the unloading action occurs between the flat-end A-frame 2 and the conveying support 4, and the flat-end A-frame 2 and the conveying support 4 are fixedly connected and can be regarded as a whole, the entire unloading process occurs in the middle of the flat-end A-frame 2 and the conveying support 4 as a whole. Compared with the aluminum rod acting on the tail of the conveying support 4, the conveying support 4 has less tendency to tilt, and the impact of the kinetic energy impact of the aluminum rod on the material of the conveying support 4 is reduced.

[0050] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An aluminum rod conveying system, comprising two inclined rails (1), two flat-end A-frames (2), a drive unit (5), and a conveying wheel (7), wherein each flat-end A-frame (2) is equipped with a lifting drive structure (21), and a lifting hook (22) is fixed on the lifting drive structure (21). The lifting hook (22) lifts the aluminum rod on the inclined rails (1) to the conveying wheel (7). The conveying wheel (7) is driven to rotate by the drive unit (5), and the conveying wheel (7) conveys the aluminum rod axially into a preheater. The system is characterized in that: The flat-end A-frame (2) is fixedly connected to a conveying bracket (4) on the side away from the placement rail (1), and the conveying wheel (7) and the drive unit (5) are installed on the top of the conveying bracket (4); The top of the placement inclined rail (1) is equipped with a guide inclined rail (3), the lowest point of the guide inclined rail (3) is higher than the conveying wheel (7), the aluminum rod rolls down to the conveying wheel (7) through the guide inclined rail (3), and several unloading positioning plates (6) are rotatably connected between the guide inclined rail (3) and the conveying wheel (7). The unloading positioning plate (6) has a limiting arc surface (61) on its side. The arc surface of the limiting arc surface (61) is opposite to the arc surface of the lifting hook (22). The rotation direction of the unloading positioning plate (6) is forward and reverse. The width of the unloading positioning plate (6) gradually increases from the rotation center to the limiting arc surface (61). The unloading positioning plate (6) rotates clockwise until the limiting arc surface (61) corresponds to the arc-shaped concave surface of the conveying wheel (7), at which point the highest point of the tangent surface of the unloading positioning plate (6) and the arc surface of the limiting arc surface (61) is flush with the lowest point of the guide rail (3).

2. The aluminum rod conveying system according to claim 1, characterized in that: The placement inclined rail (1) and the flat-end A-type frame (2) are fixedly connected by a reverse inclined surface (11).

3. The aluminum rod conveying system according to claim 1, characterized in that: The top surfaces of the guide rail (3) extend to the top of the shaft seat of the lifting drive structure (21) and the shaft seat of the conveying wheel (7), respectively.

4. The aluminum rod conveying system according to claim 1, characterized in that: The concave surface of the conveyor wheel (7) is covered with a rubber layer, which is composed of multiple rubber sheets joined together with gaps.

5. The aluminum rod conveying system according to claim 1, characterized in that: The lifting hook (22) has a pointed end (221) at the end away from the lifting drive structure (21), and the width of the lifting hook (22) gradually decreases from the lifting drive structure (21) to the pointed end (221).

6. The aluminum rod conveying system according to claim 1, characterized in that: The unloading positioning plate (6) rotates counterclockwise. The vertical distance between the tip of the limiting arc surface (61) and the guide rail (3) is not less than the diameter of the aluminum rod. When the aluminum rod separates from the lifting hook (22) and enters the guide rail (3), the aluminum rod is located at the angle between the guide rail (3) and the unloading positioning plate (6).

7. The aluminum rod conveying system according to claim 1, characterized in that: The unloading positioning plate (6) is provided with an elastic element at its rotation point. The elastic element can be a torsion spring or a tension spring. In the static state, the angle between the unloading positioning plate (6) and the guide rail (3) is less than 90 degrees, and the unloading positioning plate (6) is not perpendicular to the horizontal plane.

8. The aluminum rod conveying system according to claim 1, characterized in that: The unloading positioning plate (6) is driven to rotate by a power drive component.

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