Automatic straightening and centering equipment for multi-size heavy-load logistics trays

Abstract

The invention provides automatic straightening and centering equipment for multi-size heavy-load logistics trays. The automatic straightening and centering equipment comprises roller way conveying equipment, a ground supporting plate, a roller way conveying equipment aligning mechanism and a clamping and straightening mechanism. The roller way conveying equipment is located above the ground supporting plate. Four guide rails are installed on the ground supporting plate in parallel and divided into two sets, the first set of guide rails are two guide rails on the side away from the center of the roller way conveying equipment, and the second set of guide rails are two guide rails on the side close to the center of the roller way conveying equipment. And movable parts of the clamping and straightening mechanism and the roller way conveying equipment return mechanism are respectively mounted on the first group of guide rails and the second group of guide rails in a sliding manner. The invention discloses automatic straightening and centering equipment for multi-size heavy-load logistics trays, relates to the field of automatic straightening and centering of logistics trays, and solves the key technology of automatic straightening and centering of the multi-size heavy-load trays of more than 3 tons. And the tray is not damaged.

Description

Technical Field

[0001] The present invention relates to the field of automatic straightening and centering of logistics pallets, and in particular to an automatic straightening and centering device for multi-size heavy-load logistics pallets. Background Art

[0002] In the entire process of automobile production, there will be a conveyor roller logistics line that accommodates wooden pallets of various sizes with heavy loads. If they are directly mechanically straightened and centered, the wooden pallets will be severely damaged and cannot be transported on the track. This will also cause a large number of wooden pallets to be damaged, resulting in a large amount of waste of resources.

[0003] In the past, similar conveying methods typically separated pallets into separate groups, resulting in significant waste of equipment investment. Even when alignment was achieved, it was done purely mechanically. Because the pallet's wooden base exerted significant friction against the rollers, the force required to push it into position was nearly equal to the combined weight of the cargo and pallet. This was time-consuming and labor-intensive, requiring significant power consumption. Furthermore, the wooden pallets suffered significant damage, leading to the need for regular batch replacement; otherwise, they would not function on the roller conveyor. Summary of the Invention

[0004] In view of this, the present invention aims to propose an automatic straightening and centering device for multi-sized heavy-load logistics pallets, which solves the key technology of automatic straightening and centering of multi-sized heavy-load pallets weighing more than 3 tons. The power components used have a small load and do not cause any damage to the pallets.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] An automatic centering device for multi-size heavy-load logistics pallets, comprising a roller conveyor, a ground support plate, a roller conveyor return mechanism, and a clamping and centering mechanism;

[0007] The roller conveyor equipment is located above the ground support plate, and four guide rails are installed in parallel on the ground support plate. The four guide rails are divided into two groups. The guide rails in the first group are two guide rails on the side away from the center of the roller conveyor equipment, and the guide rails in the second group are two guide rails on the side close to the center of the roller conveyor equipment. The movable parts of the clamping and straightening mechanism and the roller conveyor equipment return mechanism are slidably installed on the first group of guide rails and the second group of guide rails respectively.

[0008] Furthermore, the roller conveyor equipment return mechanism includes a slewing bearing, a roller support frame, a roller return push plate, a roller return push plate cylinder and a mounting plate;

[0009] The roller return push plate cylinder is installed on the ground support plate and is located between the two guide rails of the second group. The power output end of the roller return push plate cylinder is connected to the roller return push plate.

[0010] The roller return push plate is slidably mounted on the second set of guide rails, the mounting plate is slidably mounted on the second set of guide rails, and the roller return push plate is located on the outer side of the mounting plate along the length direction of the guide rails;

[0011] The slewing bearing is mounted on the mounting plate, the slewing bearing is connected to the roller support frame, the roller support frame is mounted on the bottom of the roller conveyor equipment, and the roller conveyor equipment is rotatably supported on the mounting plate through the roller support frame and the slewing bearing.

[0012] Furthermore, the clamping and straightening mechanism includes a pallet straightening and centering guide, a pneumatic push plate guide, a push plate cylinder and a servo push rod;

[0013] The push plate cylinder and the servo push rod are installed on the same guide rail of the first group and are respectively located at the front and rear sides along the length direction of the guide rail;

[0014] The pneumatic push plate guide slides across the first set of guide rails and is connected to the power output end of the push plate cylinder;

[0015] The tray is centered and guided to slide across the first set of guide rails and is connected to the power output end of the servo push rod;

[0016] The pneumatic push plate guides the built-in laser ranging module, and the built-in laser ranging module signal is connected to the PLC controller. The PLC controller controls the servo push rod to push the tray according to the offset value fed back by the laser ranging module.

[0017] Furthermore, the number of the roller return push plates and the roller return push plate cylinders are both two, the two roller return push plate cylinders are installed back to back on the same straight line, the two roller return push plates are respectively slidably connected across the second group of guide rails, and are respectively located on the front and rear sides of the second group of guide rails along the length direction, and each roller return push plate is connected to one roller return push plate cylinder.

[0018] Furthermore, the number of the push plate cylinders and the number of the servo push rods are two respectively, the two push plate cylinders are respectively installed on the two guide rails of the first group, and the two servo push rods are respectively installed on the two guide rails of the first group.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The automatic straightening and centering equipment for multi-sized heavy-load logistics pallets described in the present invention realizes lossless straightening and precise centering of multi-sized wooden pallets weighing more than 3 tons on the roller through the rotation return structure of the slewing bearing and the roller support frame, the centering pushing mechanism of the low-friction linear guide and the servo push rod, as well as laser ranging and PLC closed-loop control. The symmetrically arranged double cylinders and double push rod combination not only reduces the power demand, but also avoids the damage of the pallet caused by traditional mechanical hard pushing, significantly reducing resource waste and maintenance costs.

[0021] At the same time, the partitioned sliding four-guide rail design enables the roller conveyor equipment's return mechanism and clamping and straightening mechanism to achieve clear structural partitioning, and combined with the synchronous reset function of the double-return push-plate cylinder, greatly shortens the cycle time; the entire system is highly versatile and compatible with pallets of various specifications, laying a technological foundation for high-precision docking of heavy-load conveyor lines and AGVs, and improving the overall logistics automation efficiency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the automatic centering and straightening device for multi-sized heavy-load logistics pallets according to an embodiment of the present invention;

[0024] Figure 2 This is a front view of the automatic centering device for multi-sized heavy-load logistics pallets according to an embodiment of the present invention;

[0025] Figure 3 A top view of the automatic centering device for multi-sized heavy-load logistics pallets according to an embodiment of the present invention;

[0026] Figure 4 The embodiment of the present invention Figure 2 AA cross-section of

[0027] Figure 5 The embodiment of the present invention Figure 3 BB cross-section diagram;

[0028] Figure 6 The embodiment of the present invention Figure 2 CC cross-section diagram;

[0029] Figure 7 This is a partial schematic diagram of the automatic centering device for multi-sized heavy-load logistics pallets according to an embodiment of the present invention;

[0030] Figure 8 This is an exploded view of the automatic centering and straightening device for multi-sized heavy-load logistics pallets according to an embodiment of the present invention;

[0031] Figure 9 A schematic diagram of a roller conveyor device and a roller support frame of an automatic centering device for multi-sized heavy-load logistics pallets according to an embodiment of the present invention;

[0032] Description of reference numerals:

[0033] 1. Logistics pallet; 2. Roller conveyor equipment; 3. Pallet alignment and centering guide; 4. Pneumatic push plate guide; 5. Docking equipment that needs to be aligned and centered; 6. Guide rails; 7. Ground support plate; 8. Push plate cylinder; 9. Servo push rod; 10. Rotary bearing; 11. Roller support frame; 12. Roller return push plate; 13. Roller return push plate cylinder; 14. Mounting plate. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "back" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0037] This embodiment relates to an automatic straightening and centering device for multi-sized heavy-load logistics pallets, which can solve the key technology of automatic straightening and centering of multi-sized heavy-load pallets weighing more than 3 tons. The power components used have a small load and do not cause any damage to the pallets.

[0038] Based on the above design concept, an exemplary structure of the automatic centering device for multi-sized heavy-load logistics pallets of this embodiment is as follows: Figures 1-9 As shown, it mainly includes a roller conveyor equipment 2, a ground support plate 7, a roller conveyor equipment return mechanism and a clamping and squaring mechanism; the roller conveyor equipment 2 is located above the ground support plate 7, and four guide rails 6 are installed in parallel on the ground support plate 7. The four guide rails 6 are divided into two groups. The first group of guide rails 6 are two guide rails 6 on the side away from the center of the roller conveyor equipment, and the second group of guide rails 6 are two guide rails 6 on the side close to the center of the roller conveyor equipment. The movable parts of the clamping and squaring mechanism and the roller conveyor equipment return mechanism are slidably installed on the first group of guide rails 6 and the second group of guide rails 6 respectively.

[0039] By providing four guide rails 6 and dividing them into two groups, the first group is far away from the center of the roller and the second group is close to the center of the roller, so as to respectively carry the sliding action of the clamping and straightening mechanism and the roller conveying equipment return mechanism, a clear structural partition is achieved, and the system stability and maintenance convenience are improved.

[0040] The roller conveyor equipment return mechanism includes a slewing bearing 10, a roller support frame 11, a roller return push plate 12, a roller return push plate cylinder 13 and a mounting plate 14; the roller return push plate cylinder 13 is installed on the ground support plate 7 and is located between the two guide rails 6 of the second group, and the power output end of the roller return push plate cylinder 13 is connected to the roller return push plate 12; the roller return push plate 12 is slidably installed on the second group of guide rails 6, and the mounting plate 14 is slidably installed on the second group of guide rails 6, and the roller return push plate 12 is located on the outside of the mounting plate 14 along the length direction of the guide rails 6; the slewing bearing 10 is installed on the mounting plate 14, the slewing bearing 10 is connected to the roller support frame 11, and the roller support frame 11 is installed at the bottom of the roller conveyor equipment 2, and the roller conveyor equipment 2 is rotatably supported on the mounting plate 14 through the roller support frame 11 and the slewing bearing 10.

[0041] By providing a slewing bearing 10 and a roller support frame 11, the roller conveyor equipment 2 can rotate around the center and return to the center when the pallet is tilted, avoiding damage to the wooden pallet caused by rigid collision, and achieving lossless alignment of heavy-duty logistics pallets 1 weighing more than 3 tons; by providing a roller return push plate 12 and a roller return push plate cylinder 13, the roller can be quickly reset to the center position after the logistics pallet 1 is transported, shortening the cycle time and improving the equipment's beat efficiency.

[0042] The clamping and centering mechanism includes a pallet centering guide 3, a pneumatic push plate guide 4, a push plate cylinder 8, and a servo actuator 9. The push plate cylinder 8 and servo actuator 9 are mounted on the same first set of guide rails 6, located at the front and rear ends along the length of the guide rails 6. The pneumatic push plate guide 4 slides across the first set of guide rails 6 and is connected to the power output of the push plate cylinder 8. The pallet centering guide 3 slides across the first set of guide rails 6 and is connected to the power output of the servo actuator 9. The pneumatic push plate guide 4 has a built-in laser rangefinder module, whose signal is connected to a programmable logic controller (PLC). The PLC controls the servo actuator 9 to push the pallet based on the offset value fed back by the laser rangefinder. The pneumatic push plate guide 4, via the push plate cylinder 8, can move and align the tilted pallet centering guide 3. The pallet centering guide 3, via the servo actuator 9, ensures a low friction coefficient for the aligned logistics pallet 1 along the guide rails 6, making it easy to center cargo weighing over 3 tons.

[0043] By providing a pneumatic push plate guide 4 with a built-in laser ranging module and connecting its signal to the PLC controller, the width and offset of the logistics pallet 1 can be obtained in real time, and closed-loop control can be achieved to ensure that the servo push rod 9 accurately pushes the logistics pallet 1 to align with the center of the AGV; by providing a servo push rod 9 and a ground support plate 7 respectively arranged on the front and rear sides of the first set of guide rails 6, a two-way synchronous clamping and straightening action can be formed to reduce the pushing resistance, adapt to pallets of various sizes, and avoid unilateral force causing the logistics pallet 1 to be offset or damaged.

[0044] There are two roller return push plates 12 and two roller return push plate cylinders 13. The two roller return push plate cylinders 13 are installed back to back on the same straight line. The two roller return push plates 12 are respectively slidably connected to the second set of guide rails 6 and are respectively located on the front and rear sides of the second set of guide rails 6 along the length direction. Each roller return push plate 12 is connected to a roller return push plate cylinder 13.

[0045] By providing two roller return push plate cylinders 13 installed back to back and connected to two roller return push plates 12 respectively, the roller conveyor equipment 2 can be symmetrically reset after the conveying is completed, ensuring uniform return force and preventing jamming.

[0046] There are two push plate cylinders 8 and two servo push rods 9, respectively. The two push plate cylinders 8 are respectively installed on the two guide rails 6 of the first group, and the two servo push rods 9 are respectively installed on the two guide rails 6 of the first group.

[0047] By providing two sets of push plate cylinders 8 and two sets of servo push rods 9 symmetrically installed on the first set of guide rails 6, the synchronization and load-bearing capacity of the clamping and straightening mechanism can be improved, so as to achieve stable clamping and precise centering of heavy-load pallets weighing more than 3 tons.

[0048] A slewing bearing 10 is installed beneath the roller conveyor 2 to align the tilted logistics pallet 1. A pneumatic push plate guide 4, connected to two push plate cylinders 8, pushes the tilted logistics pallet 1 toward the pallet centering guide 3, ensuring it is firmly attached to the pallet. A laser rangefinder built into the pneumatic push plate guide 4 calculates the pallet's width.

[0049] The centering data is calculated by the PLC through the data obtained by the built-in laser distance measurement on the pneumatic push plate guide 4. Given the offset value, the servo push rod 9 starts to push the logistics movement; the pneumatic push plate guide 4 connects to the two push plate cylinders 8 to start exhausting; after reaching the position, the exhaust stops; the goods begin to be transported; while transporting the goods; the pallet is straightened and the centering guide 3 and the pneumatic push plate guide 4 always maintain guidance; the roller conveyor equipment 2 performs lateral displacement transportation.

[0050] The pallet alignment and centering guide 3, connected to two servo actuators 9, guides the aligned pallet 1 along the guide rail 6 to achieve a low friction coefficient, easily moving and centering cargo weighing over 3 tons. The centering data is calculated by the PLC using data from the laser rangefinder built into the pneumatic push plate guide 4. After a given offset value, the servo actuators 9 begin to push the cargo. The pneumatic push plate guide 4, connected to two push plate cylinders 8, begins exhausting. Once in position, exhaust stops, and cargo begins to be transported. During this process, the pallet alignment and centering guide 3 and the pneumatic push plate guide 4 maintain their guidance. The roller conveyor 2 then moves the cargo laterally to the docking station 5 that requires alignment.

[0051] After the roller conveyor 2 finishes conveying, the inclined rollers are connected to a roller return push plate 12, each of which pushes the roller support frame 11 to center the roller conveyor 2; waiting for the forklift to place the next batch of goods on the roller conveyor 2.

[0052] The automatic straightening and centering equipment for multi-sized heavy-load logistics pallets using the above-mentioned implementation scheme can effectively realize the automatic straightening and centering of multi-sized heavy-load pallets weighing more than 3 tons. The power components used therein have a small load and do not cause any damage to the pallets.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic centering device for multi-size heavy-load logistics pallets, comprising a roller conveyor device (2), a ground support plate (7), a roller conveyor device return mechanism and a clamping and centering mechanism; the roller conveyor device (2) is located above the ground support plate (7), and is characterized in that: Four guide rails (6) are installed in parallel on the ground support plate (7), and the four guide rails (6) are divided into two groups. The guide rails (6) in the first group are two guide rails (6) on the side away from the center of the roller conveyor equipment, and the guide rails (6) in the second group are two guide rails (6) on the side close to the center of the roller conveyor equipment. The movable parts of the clamping and squaring mechanism and the roller conveyor equipment return mechanism are slidably installed on the guide rails (6) in the first group and the guide rails (6) in the second group, respectively.

2. The automatic centering device for multi-sized heavy-load logistics pallets according to claim 1 is characterized by: The roller conveyor equipment return mechanism comprises a slewing bearing (10), a roller support frame (11), a roller return push plate (12), a roller return push plate cylinder (13) and a mounting plate (14); The roller return push plate cylinder (13) is installed on the ground support plate (7) and is located between the two guide rails (6) of the second group. The power output end of the roller return push plate cylinder (13) is connected to the roller return push plate (12); The roller return push plate (12) is slidably mounted on the second group of guide rails (6), the mounting plate (14) is slidably mounted on the second group of guide rails (6), and the roller return push plate (12) is located outside the mounting plate (14) along the length direction of the guide rails (6); The slewing bearing (10) is mounted on the mounting plate (14), the slewing bearing (10) is connected to the roller support frame (11), the roller support frame (11) is mounted on the bottom of the roller conveyor (2), and the roller conveyor (2) is rotatably supported on the mounting plate (14) through the roller support frame (11) and the slewing bearing (10).

3. The automatic centering and straightening device for multi-sized heavy-load logistics pallets according to claim 2 is characterized by: The clamping and straightening mechanism comprises a pallet straightening and centering guide (3), a pneumatic push plate guide (4), a push plate cylinder (8) and a servo push rod (9); The push plate cylinder (8) and the servo push rod (9) are installed on the same guide rail (6) of the first group and are respectively located at the front and rear sides along the length direction of the guide rail (6); The pneumatic push plate guide (4) is slidably connected to the first set of guide rails (6) and is connected to the power output end of the push plate cylinder (8); The tray centering guide (3) is slidably connected to the first set of guide rails (6) and is connected to the power output end of the servo push rod (9); The pneumatic push plate guide (4) has a built-in laser distance measurement module, and the built-in laser distance measurement module signal is connected to a PLC controller. The PLC controller controls the servo push rod (9) to push the tray according to the offset value fed back by the laser distance measurement module.

4. The automatic centering and straightening device for multi-sized heavy-load logistics pallets according to claim 3 is characterized by: The number of the roller return push plate (12) and the roller return push plate cylinder (13) is two, and the two roller return push plate cylinders (13) are installed back to back on the same straight line. The two roller return push plates (12) are respectively slidably connected to the second group of guide rails (6) and are respectively located on the front and rear sides of the second group of guide rails (6) along the length direction. The roller return push plates (12) are each connected to one roller return push plate cylinder (13).

5. The automatic centering and straightening device for multi-sized heavy-load logistics pallets according to claim 4 is characterized by: The number of the push plate cylinder (8) and the number of the servo push rod (9) are two respectively. The two push plate cylinders (8) are respectively installed on the two guide rails (6) of the first group, and the two servo push rods (9) are respectively installed on the two guide rails (6) of the first group.

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