A scalable AGV carrier

Abstract

The utility model discloses a telescopic AGV carrier trolley, including shell and fixedly connected at its top's placing table, shell bottom four corners rotatoryly connected with removal wheel, shell middle part is provided with inner frame, inner frame inner bottom fixedly connected with slide rail, still include: extension mechanism: extension mechanism includes slidingly connected in rack top of slide rail, one end of rack is fixedly connected with extension platform, the other end of rack is fixedly connected with limit strip, the inside of rack is engaged with gear, gear bottom fixedly connected with servo motor, the left and right sides of servo motor are provided with baffle, auxiliary mechanism: auxiliary mechanism fixedly connected in extension platform surface. The utility model discloses telescopic AGV carrier trolley has the effect that the flexible, stable adjustment of bearing area.

Description

Technical Field

[0001] This utility model relates to the field of automated guided vehicles (AGVs), and in particular to a retractable AGV transport vehicle. Background Technology

[0002] AGV, or Automated Guided Vehicle, is a transport vehicle equipped with electromagnetic or optical automatic guidance devices. It can travel along a predetermined guide path and has safety protection and various transfer functions. Its main feature is that it does not require manual driving and can be scheduled and monitored through a central control system, achieving precise, efficient, and flexible transportation of materials between specific stations.

[0003] However, existing AGV transport vehicles mostly have fixed top-mounted platforms, which have the technical drawback of non-adjustable effective load-bearing area. This means they cannot extend or retract according to the actual size and quantity of the materials being transported, resulting in an unchangeable upper limit on their loading space. This restricts the utilization rate of individual devices and the scope of applicable tasks. For example, an AGV (Automated Guided Vehicle) with a fixed top support platform of 800mm × 800mm can efficiently transport uniformly sized material boxes. However, when the production line needs to temporarily transport a large panel 1200mm long, its support platform cannot extend outward to provide additional support area, leaving one-third of the panel suspended in the air and unable to be safely loaded. This forces the AGV, which could otherwise operate normally, to remain idle, waiting for other specialized vehicles or manual labor to handle the task, resulting in reduced equipment utilization for that task. Utility Model Content

[0004] This utility model discloses a retractable AGV transport vehicle, which aims to solve the technical problem that the effective carrying area of ​​existing AGV transport vehicles is not adjustable, and they cannot be extended or retracted in any way according to the actual size and quantity of the materials to be transported, thus limiting the utilization rate of a single device and the scope of application of the task.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A retractable AGV (Automated Guided Vehicle) transport vehicle includes a shell and a placement platform fixedly connected to its top. The shell has four rotatably connected casters at its bottom corners. An inner frame is located in the middle of the shell, and a slide rail is fixedly connected to the bottom of the inner frame. The vehicle also includes: an extension mechanism comprising a rack slidably connected to the top of the slide rail; an extension platform fixedly connected to one end of the rack; a limit strip fixedly connected to the other end of the rack; a gear meshing inside the rack; a servo motor fixedly connected to the bottom of the gear; and baffles on both sides of the servo motor. An auxiliary mechanism is fixedly connected to the surface of the extension platform.

[0006] By adopting the above technical solution, the telescopic function of the load-bearing platform is realized by using a gear-rack transmission system. When the servo motor fixed at the bottom of the inner frame is started, it drives the gear at the top to rotate, thereby meshing and driving two symmetrically arranged racks at the front and rear. These two racks are precisely guided and slid through the slide rail at the bottom. One end of the rack is directly fixedly connected to the extension platform. Therefore, when the gear rotates forward and backward, it can synchronously drive the extension platforms on the left and right sides to smoothly extend or retract from the outer shell. Without increasing the overall basic size of the equipment, the effective working area of ​​the top placement platform is dynamically changed, thereby solving the problem that the load-bearing platform is fixed and cannot adapt to materials of different sizes.

[0007] As a further embodiment of this utility model: the auxiliary mechanism includes a rotating seat fixedly connected to the bottom of the extension platform, a wheel seat rotatably connected to the bottom of the rotating seat, a universal wheel fixedly connected to the bottom of the wheel seat, pins provided on the left and right sides of the rotating seat, and a horizontal plate provided on the top of the rotating seat.

[0008] By adopting the above technical solution, a retractable caster system is used to enhance the stability of the extension table in its extended state. A rotating base is located at the bottom of the extension table, with casters connected below via wheel seats. When the extension table is retracted, a locking pin can be inserted into one of the seats to fold the caster assembly upwards for storage. When the extension table needs to extend to carry heavy objects, the locking pin is pulled out, the caster assembly is rotated downwards to a vertical position, and then the locking pin is inserted into another seat to lock it, thus allowing the casters to contact the ground and form a stable support together with the main moving wheels, effectively preventing sinking or swaying that may occur due to platform cantilever. Furthermore, a sliding horizontal plate on top of the rotating base slides out, filling the gap created when the extension table extends, resulting in a complete rectangular work surface.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. It overcomes the shortcomings of the fixed carrying platform of traditional AGV transport vehicles. Through efficient gear-rack transmission, it realizes flexible and stable adjustment of the carrying area, enabling a single device to adapt to materials of different sizes and quantities, improving equipment utilization and task applicability, while also ensuring the compactness of the basic structure.

[0010] 2. To address the potential sinking and swaying issues that may arise from the cantilever structure after the extension platform is extended, lockable casters provide additional stability and work in conjunction with the crossbar to ensure the structural rigidity and load-bearing safety of the extension platform in its extended state, guaranteeing smooth and reliable handling of heavy objects.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a retractable AGV transport vehicle proposed in this utility model.

[0013] Figure 2 This is a diagram illustrating the moving wheels of a retractable AGV transport vehicle proposed in this utility model.

[0014] Figure 3 This is a schematic diagram of the extension mechanism of a retractable AGV transport vehicle proposed in this utility model.

[0015] Figure 4 This is an unfolded diagram of the extension mechanism of a retractable AGV transport vehicle proposed in this utility model.

[0016] Figure 5 This is an unfolded diagram of the auxiliary mechanism of a retractable AGV transport vehicle proposed in this utility model.

[0017] In the attached diagram: 1. Outer shell; 2. Placement platform; 3. Casters; 4. Inner frame; 5. Slide rail; 6. Rack; 7. Extension platform; 8. Limiting strip; 9. Gear; 10. Servo motor; 11. Baffle; 12. Rotating seat; 13. Wheel seat; 14. Casters; 15. Pin; 16. Horizontal plate. Detailed Implementation

[0018] 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.

[0019] Reference Figures 1 to 4 A retractable AGV transport vehicle includes a housing 1 and a placement platform 2 fixedly connected to its top. Four corners of the bottom of the housing 1 are rotatably connected to moving wheels 3. An inner frame 4 is provided in the middle of the housing 1, and a slide rail 5 is fixedly connected to the bottom of the inner frame 4. The vehicle also includes: an extension mechanism: the extension mechanism includes a rack 6 slidably connected to the top of the slide rail 5. One end of the rack 6 is fixedly connected to an extension platform 7, and the other end of the rack 6 is fixedly connected to a limit strip 8. A gear 9 meshes on the inner side of the rack 6, and a servo motor 10 is fixedly connected to the bottom of the gear 9. Baffles 11 are provided on the left and right sides of the servo motor 10. An auxiliary mechanism: the auxiliary mechanism is fixedly connected to the surface of the extension platform 7.

[0020] Specifically, when the load-bearing area needs to be expanded, the servo motor 10 fixed to the bottom of the inner frame 4 will start, driving the gear 9 on its output shaft to rotate. This gear 9 simultaneously meshes with two symmetrically arranged racks 6. Since the bottom of the racks 6 is restricted to the fixed slide rail 5, they can only move linearly in the direction of the slide rail 5. The forward or reverse rotation of the gear 9 will be converted into the two racks 6 moving towards or away from each other along the slide rail 5. Since one end of the rack 6 is fixedly connected to the extension platform 7, this movement is directly converted into the synchronous extension or retraction of the left and right extension platforms 7 from the inside of the outer shell 1. By controlling the rotation angle of the servo motor 10, the extension stroke of the extension platform 7 can be precisely controlled, thereby dynamically and flexibly adjusting the effective working area of ​​the entire placement platform 2 to accommodate materials of different sizes. During extension and retraction, the limiting strip 8 and the baffle 11 limit the racks 6 to prevent them from moving excessively and falling off, while also protecting the servo motor 10.

[0021] The servo motor 10 is fixedly connected to the bottom center of the inner frame 4, and the baffle 11 is fixedly connected to the bottom of the inner frame 4. It cooperates with the limiting strip 8 fixed on the rack 6 to absorb the impact energy when the rack 6 moves to the limit position and protect the servo motor 10 and gear 9 from damage. The extension platform 7 is slidably connected to the inside of the inner frame 4 on both the front and rear sides, and the top of the gear 9 is rotatably connected to the top of the inner frame 4.

[0022] There are two racks 6, which are symmetrically meshed on the front and rear sides of the servo motor 10. The bottom of the racks 6 is slidably connected to the inside of the inner frame 4 through the slide rail 5. The extension platform 7 is set at the left and right ends of the inner frame 4. The extension platform 7 has a cavity inside. The symmetrical telescopic mode keeps the center of gravity of the AGV on the longitudinal center axis of the vehicle, ensuring the stability of the AGV when the extension platform 7 is extended or retracted, and avoiding the risk of deviation or tilting due to the center of gravity shift.

[0023] Reference Figure 1 , Figure 3 and Figure 5 In a preferred embodiment, the auxiliary mechanism includes a rotating seat 12 fixedly connected to the bottom of the extension platform 7, a wheel seat 13 rotatably connected to the bottom of the rotating seat 12, a universal wheel 14 fixedly connected to the bottom of the wheel seat 13, pins 15 on the left and right sides of the rotating seat 12, and a horizontal plate 16 on the top of the rotating seat 12.

[0024] Specifically, when the extension platform 7 is fully retracted, the caster wheel 14 assembly at its bottom is in a retracted state: by inserting the locking pin 15 into the slot above the rotating seat 12, the wheel seat 13 assembly with the caster wheel 14 is flipped upwards and locked, lifting it off the ground. When the extension platform 7 extends to carry heavy objects, the caster wheel 14 needs to be lowered to prevent the cantilever structure from sagging or swaying. The operator only needs to pull out the locking pin 15, rotate the wheel seat 13 assembly downwards by ninety degrees to a vertical position, and then insert the locking pin 15 into the slot below the rotating seat 12 to lock the caster wheel 14 in the working position. Together with the original four main moving wheels 3 of the trolley, they form a support, enhancing the overall stability. At the same time, the cross plate 16 connected to the top of the rotating seat 12 will slide out of the cavity synchronously with the extension platform 7, filling the gap between the extension platform 7 and the inner frame 4, ensuring the integrity and flatness of the top work surface, and providing a continuous and stable bearing plane for materials.

[0025] The rotating base 12 has a pair of retaining seats on its front and rear sides. One retaining seat is fixedly connected to the bottom of the rotating base 12, and the other retaining seat is fixedly connected to the inside of the rotating base 12. The retaining pin 15 is inserted into the retaining seat on the surface of the rotating base 12. Through the pluggable design of the retaining pin 15 and the retaining seat, the omnidirectional wheel 14 can be fixed in its state, preventing it from rotating accidentally when subjected to external force or vibration during movement, and ensuring the high stability of the support state.

[0026] The outer end of the pin 15 is magnetically attached to the surface of the rotating seat 12. The magnetic design not only increases the fixing effect but also avoids the risk of loss due to random placement. The inner end of the pin 15 is inserted into the socket on the surface of the wheel seat 13. The horizontal plate 16 is slidably connected to the cavities on the front and rear sides of the extension platform 7. The sliding connection of the horizontal plate 16 fills the gap between the extension platform 7 and the main vehicle body, realizing the extension of the support structure and functional compensation.

[0027] Reference Figure 1 , Figure 2 and Figure 4 In a preferred embodiment, there are two slide rails 5, which are symmetrically fixedly connected to the bottom of the inner frame 4. The moving wheels 3 are driven by the motor and control panel inside the outer shell 1. The top of the placement platform 2 is provided with anti-slip strips.

[0028] Specifically, the symmetrical layout of the dual slide rails 5 ensures that the left and right extension platforms 7 maintain strictly synchronized movement during extension and retraction, effectively preventing jamming or asynchrony problems that may occur due to different resistance on one side. The anti-slip strips on the top of the placement platform 2 increase the static friction between the material and the platform, effectively preventing the material carried by the trolley from sliding or tipping over when it starts, brakes or accelerates.

[0029] Working Principle: In operation, when the AGV needs to transport large materials, the servo motor 10 drives the gear 9 on its output shaft to rotate. This gear 9 simultaneously meshes with two symmetrically arranged racks 6. Since the bottom of the racks 6 is constrained to the slide rail 5 fixed to the bottom of the inner frame 4, the rotational motion of the gear 9 is converted into linear motion of the two racks 6 along the slide rail 5. When the gear 9 rotates forward, the two racks 6 move in opposite directions, thereby pushing the extension platforms 7 on the left and right sides to extend synchronously outward from inside the outer casing 1, effectively expanding the load-bearing area of ​​the placement platform 2. During this process, the limiting strip 8 fixed to one end of the rack 6 contacts the baffle 11 fixed inside the inner frame 4, forming a mechanical limit to prevent the racks 6 from moving excessively and disengaging, protecting the transmission system. Conversely, when the gear 9 rotates in the opposite direction, the racks 6 move towards each other, pulling the extension platforms 7 back, restoring the AGV to its compact state, facilitating passage in narrow spaces. To ensure the stability of the extension platform 7 when extended and bearing weight, and before the extension platform 7 is fully extended, the operator manually pulls out the locking pin 15 that locks the wheel seat 13 in the storage position, rotates the assembly including the wheel seat 13 and the casters 14 downwards by 90 degrees around the rotating base 12 to a vertical position, and then inserts the locking pin 15 into the locking slot in the working position for locking. At this time, the casters 14 are in contact with the ground, forming a support point together with the four original active moving wheels 3 of the trolley, effectively preventing the extension platform 7 from sinking and shaking due to cantilever stress. At the same time, the horizontal plate 16 fixedly connected to the top of the rotating base 12 will slide out of the cavity synchronously with the extension platform 7 as it extends, seamlessly filling the gap between the extension platform 7 and the inner frame 4, making the entire work surface a complete and flat rectangular load-bearing area.

[0030] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A retractable AGV transport vehicle, comprising a shell (1) and a placement platform (2) fixedly connected to its top, wherein four corners of the bottom of the shell (1) are rotatably connected to moving wheels (3), and an inner frame (4) is provided in the middle of the shell (1), wherein a slide rail (5) is fixedly connected to the bottom of the inner frame (4), characterized in that, Also includes: Extension mechanism: The extension mechanism includes a rack (6) slidably connected to the top of the slide rail (5), an extension platform (7) is fixedly connected to one end of the rack (6), a limit bar (8) is fixedly connected to the other end of the rack (6), a gear (9) meshes with the inside of the rack (6), a servo motor (10) is fixedly connected to the bottom of the gear (9), and baffles (11) are provided on the left and right sides of the servo motor (10). Auxiliary mechanism: The auxiliary mechanism is fixedly connected to the surface of the extension platform (7). The auxiliary mechanism includes a rotating seat (12) fixedly connected to the bottom of the extension platform (7). A wheel seat (13) is rotatably connected to the bottom of the rotating seat (12). A universal wheel (14) is fixedly connected to the bottom of the wheel seat (13). Pins (15) are provided on the left and right sides of the rotating seat (12). A horizontal plate (16) is provided on the top of the rotating seat (12).

2. The retractable AGV transport vehicle according to claim 1, characterized in that, The bottom of the servo motor (10) is fixedly connected to the center of the bottom of the inner frame (4), the bottom of the baffle (11) is fixedly connected to the bottom of the inner frame (4), the front and rear sides of the extension platform (7) are slidably connected to the inside of the inner frame (4), and the top of the gear (9) is rotatably connected to the top of the inner frame (4).

3. A retractable AGV transport vehicle according to claim 2, characterized in that, There are two racks (6), which are symmetrically meshed on the front and rear sides of the servo motor (10). The bottom of the racks (6) is slidably connected to the inside of the inner frame (4) via a slide rail (5). The extension platform (7) is set at the left and right ends of the inner frame (4), and the extension platform (7) has a cavity inside.

4. The retractable AGV transport vehicle according to claim 1, characterized in that, The rotating seat (12) has a pair of card holders on each of its front and rear sides. One card holder is fixedly connected to the bottom of the rotating seat (12), and the other card holder is fixedly connected to the inside of the rotating seat (12). The card pin (15) is inserted into the card holder on the surface of the rotating seat (12).

5. A retractable AGV transport vehicle according to claim 4, characterized in that, The outer end of the SIM card (15) is attracted to the surface of the rotating seat (12) by a magnet, and the inner end of the SIM card (15) is inserted into the insertion hole on the surface of the wheel seat (13). The horizontal plate (16) is slidably connected to the cavities on the front and rear sides of the extension platform (7).

6. A retractable AGV transport vehicle according to claim 1, characterized in that, There are two slide rails (5), and the two slide rails (5) are symmetrically fixedly connected to the bottom of the inner frame (4). The moving wheel (3) is driven by the motor and control panel inside the outer shell (1). The top of the placement platform (2) is provided with anti-slip strips.

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