Heavy-load AGV trolley

Abstract

The utility model relates to a heavy-load AGV (Automatic Guided Vehicle), which can quickly rotate a shear fork mechanism through the matching of a driving mechanism and a transmission mechanism so as to realize the effect of lifting a fork arm, and is more convenient and quicker compared with a plurality of hydraulic driving parts required by the traditional heavy-load AGV. Through the design of the shear fork mechanism and the multi-layer supporting structure, the stability and the bearing capacity of the trolley in the heavy-load working state are greatly improved, and later maintenance is more convenient and faster through the simplified structural design and the detachable connecting mode.

Description

Technical Field

[0001] The utility model relates to the technical field of AGV vehicles, and more specifically, it relates to a heavy-duty version of AGV vehicle. Background Art

[0002] In recent years, the wide application of automated logistics in various industries has promoted the improvement of warehousing and transportation efficiency. As an important part of logistics transportation, AGV vehicles play a key role in intelligent warehouses and production lines. With the increasing requirement for load capacity, heavy-duty version AGV vehicles have emerged to meet the handling needs of heavy objects. The traditional heavy-duty version AGV vehicles have the following problems: the lifting structure is complex, and in order to ensure good supporting force, multiple hydraulic lifting components are often equipped, resulting in a complex overall structure, high failure rate, high maintenance cost, low scene adaptability, and under heavy-duty working conditions, the supporting structure of the existing AGV vehicles is prone to deformation or failure, affecting the stability and safety of the vehicle. Therefore, we propose a heavy-duty version of AGV vehicle that significantly improves stability and safety under heavy loads through reasonable structural design and efficient transmission and lifting mechanisms, and has better maintenance convenience. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a heavy-duty version of AGV vehicle to solve the problems existing in the above background art.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions: A heavy-duty version of AGV vehicle, comprising: a vehicle chassis, at least one fork arm, at least one scissor mechanism corresponding to the fork arm for driving the fork arm to lift, at least one transmission mechanism corresponding to the scissor mechanism for driving the scissor mechanism to lift, and at least one driving mechanism corresponding to the transmission mechanism for driving the transmission mechanism; the scissor mechanism is rotatably connected to the vehicle chassis; the fork arm is fixedly connected to the scissor mechanism; the driving mechanism is fixedly connected to the vehicle chassis; the transmission mechanism is slidably connected to the vehicle chassis; the input end of the transmission mechanism is in transmission connection with the output end of the driving mechanism, and the output end of the transmission mechanism is in transmission connection with the scissor mechanism.

[0005] Optionally, the transmission mechanism includes: a first fixing member, a second fixing member corresponding to the first fixing member, a movable seat, a plurality of screw nuts for driving the movable seat to move, and a push rod for driving the scissor mechanism to lift; the first fixing member and the second fixing member are detachably connected to the trolley chassis and the driving assembly respectively; the first fixing member and the second fixing member are symmetrically arranged; the first fixing member and the second fixing member are both provided with a guide groove for limiting the moving direction of the movable seat; the trolley chassis is provided with a guide groove for the movable seat to move The movable groove for movement; the movable seat is slidably received in the movable groove; several of the screw nuts are transmission connected to the movable seat; several of the screw nuts are transmission connected to the output end of the driving mechanism respectively; several movable wheels are rotatably provided on both sides of the movable seat; the movable wheels are slidingly received in the corresponding guide grooves respectively; the push rod is rotationally connected to the movable seat; transmission pins for driving the push rod to lift are provided on both sides of the movable seat; two transmission pins are hinged to one end of the push rod; the other end of the push rod is transmission connected to the scissors-fork mechanism.

[0006] Optionally, the driving mechanism includes: a screw for driving several of the screw nuts to move, a motor and a mounting seat for driving the screw to rotate in the reverse or forward direction; the motor is detachably connected to the trolley chassis; the mounting seat is detachably connected to the trolley chassis; one end of the screw is fixedly connected to the output end of the motor, and the other end is rotatably connected to the mounting seat; the screw is respectively transmission-connected to several of the screw nuts; one end of the first fixing member and one end of the second fixing member are respectively detachably connected to both sides of the motor; the other end of the first fixing member and the other end of the second fixing member are respectively detachably connected to both sides of the mounting seat.

[0007] Optionally, the scissor mechanism includes: a first scissor, a second scissor, a third scissor, a fourth scissor, a connecting shaft, a first connecting plate for increasing the overall support strength, a second connecting plate for increasing the overall support strength, a transmission shaft for connecting with the push rod, a first connecting seat and a second connecting seat; one end of the first scissor, one end of the second scissor, one end of the third scissor and one end of the fourth scissor are respectively hinged to the trolley chassis, and the other end of the first scissor, the other end of the second scissor, the other end of the third scissor and the other end of the fourth scissor are respectively hinged to the fork arm; the first scissor and the second scissor are respectively hinged to one end of the connecting shaft; the third scissor and the fourth scissor are respectively hinged to the other end of the connecting shaft; one end of the first connecting plate is detachably connected to the first scissor, and the other end is detachably connected to the third scissor; one end of the second connecting plate is detachably connected to the second scissor, and the other end is detachably connected to the fourth scissor; the first connecting seat is fixedly connected to the first scissor; the second connecting seat is fixedly connected to the third scissor; one end of the transmission shaft is rotatably connected to the first connecting seat, and the other end is rotatably connected to the second connecting seat; the transmission shaft is rotatably connected to the other end of the push rod.

[0008] Optionally, there are also provided: a high-position limit switch for identifying whether the scissor mechanism is in the highest position and a low-position limit switch for identifying whether the scissor mechanism is in the lowest position; the high-position limit switch is fixedly connected to the trolley chassis and is located at one end of the moving groove; the low-position limit switch is fixedly connected to the trolley chassis and is located at the other end of the moving groove.

[0009] Optionally, the shape of the push rod is U-shaped; two convex parts are respectively arranged on both sides of the top of the push rod.

[0010] Optionally, there are also provided: a driving moving mechanism and a driven moving mechanism for driving the AGV trolley to move; the driving moving mechanism is rotatably connected to one end of the bottom of the trolley chassis; the driven moving mechanism is rotatably connected to the other end of the bottom of the trolley chassis.

[0011] Optionally, the driving moving mechanism includes: a driving caster and a driving part for driving the driving caster to rotate; the driving caster is rotatably connected to the trolley chassis; the driving part is fixedly connected to the trolley chassis; the output end of the driving part is in transmission connection with the driving caster.

[0012] Optionally, the driven moving mechanism includes: a driven caster; the driven caster is rotatably connected to the trolley chassis.

[0013] Optionally, an anti-collision detection sensor for preventing the trolley from colliding with an object is further arranged on the outer side of the trolley chassis.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1. Through the cooperation of the driving mechanism and the transmission mechanism, the scissor mechanism can be quickly rotated, so as to achieve the effect of lifting the fork arms. Compared with the multiple hydraulic driving components required by traditional heavy-duty AGV vehicles, it is more convenient and fast. Through the design of the scissor mechanism and the multi-layer support structure, the stability and load-bearing capacity of the vehicle under heavy-duty working conditions are greatly improved. The simplified structural design and detachable connection method make later maintenance more convenient.

[0016] 2. Through the setting of the limit switch and the application of the anti-collision sensor, the safety during the working process is ensured. The combined action of the active moving mechanism and the driven mechanism enables the vehicle to adapt to a variety of operating environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 is a schematic diagram of the connection method of the transmission mechanism and the driving mechanism of the utility model;

[0020] Figure 4 is a schematic diagram of the specific structure of the transmission mechanism of the utility model;

[0021] Figure 5 is a schematic diagram of the specific structure of the scissor mechanism of the utility model;

[0022] Figure 6 is a schematic diagram of the cross-sectional structure of the push rod of the utility model.

[0023] In the figure: 1, vehicle chassis; 11, moving groove; 2, fork arms; 3, scissor mechanism; 31, first scissor; 32, second scissor; 33, third scissor; 34, fourth scissor; 35, connecting shaft; 36, first connecting plate; 37, second connecting plate; 38, transmission shaft; 39, first connecting seat; 310, second connecting seat; 4, transmission mechanism; 41, first fixing piece; 42, second fixing piece; 43, moving seat; 431, transmission pin; 44, push rod; 441, convex part; 45, screw nut; 46, guiding groove; 47, moving wheel; 5, driving mechanism; 51, screw rod; 52, motor; 53, mounting seat; 6, high-level limit switch; 7, low-level limit switch; 8, active moving mechanism; 81, active caster; 82, driving part; 9, driven moving mechanism; 91, driven caster; 10, anti-collision detection sensor. Detailed Embodiments

[0024] To make the objectives, features, and advantages of the present utility model more apparent and understandable, the following provides a detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0025] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include one or more of such features.

[0026] In the present utility model, unless otherwise clearly defined and limited, the fact that the first feature is "above" or "below" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the fact that the first feature is "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The fact that the first feature is "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature. The terms "vertical", "horizontal", "left", "right", "up", "down", and similar expressions are only for the purpose of illustration and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0027] The following describes the present utility model in detail with reference to the drawings and embodiments.

[0028] The present utility model provides a heavy-duty version of an AGV cart, as Figure 1As shown in the figure, it includes: a trolley chassis 1, at least one fork arm 2, at least one scissor mechanism 3 corresponding to the fork arm 2 for driving the fork arm 2 to lift, at least one transmission mechanism 4 corresponding to the scissor mechanism 3 for driving the scissor mechanism 3 to lift, and at least one driving mechanism 5 corresponding to the transmission mechanism 4 for driving the transmission mechanism 4; the scissor mechanism 3 is rotatably connected to the trolley chassis 1; the fork arm 2 is fixedly connected to the scissor mechanism 3; the driving mechanism 5 is fixedly connected to the trolley chassis 1; the transmission mechanism 4 is slidably connected to the trolley chassis 1; the input end of the transmission mechanism 4 is drivingly connected to the output end of the driving mechanism 5, and the output end of the transmission mechanism 4 is drivingly connected to the scissor mechanism 3.

[0029] In the embodiment, the driving mechanism 5 drives the transmission mechanism 4, thereby driving the scissor mechanism 3 to drive the fork arm 2 to lift. There is no need to install an additional driving part 82. The structure is simple and reliable, and the effect of heavy-load fork picking can be achieved. The trolley can run smoothly under reasonable load, improving the operation ability of the trolley.

[0030] In other embodiments, several fork arms 2, and their corresponding transmission mechanisms 4 and driving mechanisms 5 can be installed within a reasonable range and adjusted according to the actual usage requirements of the user, further improving the scene adaptability.

[0031] Furthermore, the transmission mechanism 4 includes: a first fixing member 41, a second fixing member 42 corresponding to the first fixing member 41, a moving seat 43, several screw nuts 45 for driving the moving seat to move, and a push rod 44 for driving the scissor mechanism 3 to lift; the first fixing member 41 and the second fixing member 42 are respectively detachably connected to the trolley chassis 1 and the driving assembly 5; the first fixing member 41 and the second fixing member 42 are symmetrically arranged; both the first fixing member 41 and the second fixing member 42 are provided with guiding grooves 46 for limiting and guiding the moving direction of the moving seat 43; the trolley chassis 1 is provided with a moving groove 11 for the moving seat 43 to move; the moving seat 43 is slidably received in the moving groove 11; several screw nuts 45 are all drivingly connected to the moving seat 43; several screw nuts 45 are respectively drivingly connected to the output end of the driving mechanism 5; several moving wheels 47 are rotatably arranged on both sides of the moving seat 43; the moving wheels 47 are respectively slidably received in the corresponding guiding grooves 46; the push rod 44 is rotatably connected to the moving seat 43; transmission pins 431 for driving the push rod 44 to lift are arranged on both sides of the moving seat 43; the two transmission pins 431 are hinged to one end of the push rod 44; the other end of the push rod 44 is drivingly connected to the scissor mechanism 3.

[0032] Specifically, asFigures 2 - 4 As shown, the moving seat 43 is driven to move by a number of screw nuts 45 that are transmission-connected to the output end of the driving mechanism 5, and the moving wheels 47 on both sides of the moving seat 43 are guided by the guide groove 46, so that the moving seat 43 moves forward or reverse along the guide groove 46; during the forward movement of the moving seat 43, the transmission pin 431 on the moving seat 43 drives the push rod 44 to rotate along the connection center with the moving seat 43, so that the end of the push rod 44 connected to the scissors-fork mechanism 3 is lifted, thereby driving the scissors-fork mechanism 3 to be lifted; during the reverse movement, the transmission pin 431 drives the push rod 44, so that the end of the push rod 44 connected to the scissors-fork mechanism 3 is continuously lowered, so that the scissors-fork mechanism 3 is retracted, thereby causing the fork arm 2 to descend.

[0033] Furthermore, the driving mechanism 5 includes: a screw rod 51 for driving several of the screw rod nuts to move, a motor 52 and a mounting seat 53 for driving the screw rod 51 to rotate reversely or forwardly; the motor 52 is detachably connected to the trolley chassis 1; the mounting seat 53 is detachably connected to the trolley chassis 1; one end of the screw rod is fixedly connected to the output end of the motor 52, and the other end is rotatably connected to the mounting seat 53; the screw rod 51 is respectively transmission-connected to several of the screw rod nuts 45; one end of the first fixing member and one end of the second fixing member are respectively detachably connected to both sides of the motor; the other end of the first fixing member and the other end of the second fixing member are respectively detachably connected to both sides of the mounting seat.

[0034] Specifically, such as Figure 3 As shown, the motor 52 drives the screw rod 51 to rotate in the reverse direction or in the forward direction, thereby driving the movable seat 43 to move in the reverse direction or in the forward direction; the mounting seat 53 is arranged on the trolley chassis 1 and is connected to the screw rod 51, and is used to limit the position of the screw rod 51 to prevent the screw rod 51 from being out of position and unable to work normally due to environmental factors such as vibration during operation, and at the same time limit the maximum moving distance of the movable seat 43 to a certain extent to avoid accidents.

[0035] Further, the scissor mechanism 3 includes: a first scissor 31, a second scissor 32, a third scissor 33, a fourth scissor 34, a connecting shaft 35, a first connecting plate 36 for increasing the overall support strength, a second connecting plate 37 for increasing the overall support strength, a transmission shaft 38 for connecting with the push rod 44, a first connecting seat 39 and a second connecting seat 310; one end of the first scissor 31, one end of the second scissor 32, one end of the third scissor 33 and one end of the fourth scissor 34 are respectively hinged to the trolley chassis 1, and the other end of the first scissor 31, the other end of the second scissor 32, the other end of the third scissor 33 and the other end of the fourth scissor 34 are respectively hinged to the fork arm 2; the first scissor 31 and the second scissor 32 are respectively hinged to one end of the connecting shaft 35; the third scissor 33 and the fourth scissor 34 are respectively hinged to the other end of the connecting shaft 35; one end of the first connecting plate 36 is detachably connected to the first scissor 31, and the other end is detachably connected to the third scissor 33; one end of the second connecting plate 37 is detachably connected to the second scissor 32, and the other end is detachably connected to the fourth scissor 34; the first connecting seat 39 is fixedly connected to the first scissor 31; the second connecting seat 310 is fixedly connected to the third scissor 33; one end of the transmission shaft 38 is rotatably connected to the first connecting seat 39, and the other end is rotatably connected to the second connecting seat 310; the transmission shaft 38 is rotatably connected to the other end of the push rod 44.

[0036] Specifically, as Figure 5 shown, the first connecting plate 36 and the second connecting plate 37 are provided to improve the overall structural support strength of the scissor mechanism 3, so that it can bear a higher weight and meet the use requirements of the heavy-duty version AGV trolley; the push rod 44 is used to drive the lifting of the overall scissor structure. Compared with the traditional scissor directly driven by hydraulic components, the structure is simpler and more reliable. At the same time, the push rod 44 also provides a certain supporting force, which further ensures the stability of the overall structure.

[0037] Further, there are also provided: a high-position limit switch 6 for identifying whether the scissor mechanism 3 is at the highest position and a low-position limit switch 7 for identifying whether the scissor mechanism 3 is at the lowest position; the high-position limit switch 6 is fixedly connected to the trolley chassis 1 and is located at one end of the moving groove 11; the low-position limit switch 7 is fixedly connected to the trolley chassis 1 and is located at the other end of the moving groove 11.

[0038] Specifically, as Figure 2As shown, when the moving seat 43 moves to the position of the high - level limit switch 6, the high - level limit switch 6 recognizes and senses the moving seat 43, determines that the scissor mechanism 3 is at the highest position at this time, and transmits a signal to stop the motor 52 from driving, so as to avoid faults caused by exceeding the maximum moving stroke; when the moving seat 43 moves to the position of the low - level limit switch 7, the low - level limit switch 7 recognizes and senses the moving seat 43, determines that the scissor mechanism 3 is at the lowest height at this time, and transmits a signal to stop the motor 52 from driving, so as to avoid faults caused by exceeding the maximum moving stroke.

[0039] Further, the shape of the push rod 44 is U - shaped; two convex parts 441 are respectively arranged on both sides of the top of the push rod 44.

[0040] Specifically, as Figure 4 shown, the shape of the push rod 44 is U - shaped. One separated end of it is rotatably connected to the moving seat 43, and the other end is rotatably connected to the connecting shaft 35. The push rod 44 is also provided with reinforcing ribs. The push rod 44 with this structure has higher structural strength, can provide better supporting force, is more gentle and balanced when driving the scissor mechanism 3 to lift, and can effectively bear heavier loads; the convex parts arranged on the push rod make the force between the push rod 44 and the connecting shaft 35 better, the connecting shaft is evenly stressed and will not easily break, etc., so that the service life of the connecting shaft is longer.

[0041] Further, as Figure 1 shown, there are also provided: an active moving mechanism 8 and a driven moving mechanism 9 for driving the AGV cart to move; the active moving mechanism 8 is rotatably connected to one end of the bottom of the cart chassis 1; the driven moving mechanism 9 is rotatably connected to the other end of the bottom of the cart chassis 1.

[0042] Specifically, the active moving mechanism 8 and the driven moving mechanism 9 are set up to realize the flexible movement of the AGV cart, and the drive of the active caster 81 ensures flexibility and response ability.

[0043] Further, the active moving mechanism 8 includes: an active caster 81 and a driving part 82 for driving the active caster 81 to rotate; the active caster 81 is rotatably connected to the cart chassis 1; the driving part 82 is fixedly connected to the cart chassis 1; the output end of the driving part 82 is in transmission connection with the active caster 81.

[0044] Specifically, the driving part 82 drives the active caster 81 to operate, ensuring good power support when the cart performs tasks.

[0045] Further, the driven moving mechanism 9 includes: a driven caster 91; the driven caster 91 is rotatably connected to the cart chassis 1.

[0046] Specifically, the driven caster 91 provides additional support. When the active moving mechanism 8 drives the cart to move, it can be guided to a certain extent to ensure the stability of the cart on complex paths.

[0047] In other embodiments, two active moving mechanisms 8 can be used to ensure the power requirements of the AGV cart to adapt to more different usage scenarios.

[0048] Furthermore, an anti-collision detection sensor 10 for preventing the cart from colliding with objects is also provided on the outer side of the cart chassis 1.

[0049] Specifically, the anti-collision detection sensor 10 is set to ensure that the cart maintains a safe distance from other objects during operation, improving the safety of the workplace.

[0050] In the specific implementation process, the control mode of each of the above mechanisms is controlled by the built-in controller of the AGV cart, which is one of the commonly used technologies in the art and is a relatively mature technology.

[0051] When it is necessary to lift the goods, the motor 52 drives the lead screw 51 to rotate forward. The lead screw 51 drives the lead screw nut 45 to make the moving seat 43 move along the guide grooves 46 on the first fixing member 41 and the second fixing member 42, thereby driving the moving seat 43 to move forward in the moving groove 11. During the movement of the moving seat 43, the transmission pin 431 on the moving seat 43 drives the push rod 44, so that the push rod 44 rotates around the connection point of the push rod 44 and the moving seat 43, thereby driving the scissor mechanism 3 connected to the other end of the push rod 44 to be lifted as a whole, achieving the effect of lifting the goods. When the moving seat 43 moves to the position where the high position limit switch 6 is set on the moving groove 11, the motor 52 stops driving. At this time, the effect of lifting the goods to the highest position is completed;

[0052] When it is necessary to lower the goods, the motor 52 drives the lead screw 51 to rotate reversely. The lead screw 51 drives the lead screw nut 45 to make the moving seat 43 move along the guide grooves 46 on the first fixing member 41 and the second fixing member 42, thereby driving the moving seat 43 to move reversely in the moving groove 11. During the movement of the moving seat 43, the transmission pin 431 on the moving seat 43 drives the push rod 44, and the overall gravity of the scissor mechanism 3 causes the other end of the push rod 44 to slowly descend, thereby driving the scissor mechanism 3 to descend as a whole, achieving the effect of lowering the goods. When the moving seat 43 moves to the position where the low position limit switch is set on the moving groove 11, the motor 52 stops driving. At this time, the effect of lowering the goods to the lowest position is completed.

[0053] A heavy-duty version of the AGV cart of the present utility model, through the design of the scissor mechanism 3 and the multi-layer support structure, greatly improves the stability and load-bearing capacity of the cart in the heavy-duty working state; the simplified structural design and detachable connection method make the later maintenance more convenient; through the setting of the limit switch and the application of the anti-collision sensor, the safety during the working process is ensured; the combined action of the active moving mechanism 8 and the driven mechanism enables the cart to adapt to various operating environments; through the driving mode of the motor 52 and the lead screw 51, the driving efficiency is improved, the energy loss is reduced and the working efficiency is increased.

[0054] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An overloaded AGV cart, characterized in that, Comprising: A trolley chassis, at least one fork arm, at least one scissor mechanism corresponding to the fork arm for driving the fork arm to lift, at least one transmission mechanism corresponding to the scissor mechanism for driving the scissor mechanism to lift, and at least one driving mechanism corresponding to the transmission mechanism for driving the transmission mechanism; The scissor mechanism is rotatably connected to the trolley chassis; the fork arm is fixedly connected to the scissor mechanism; The driving mechanism is fixedly connected to the trolley chassis; The transmission mechanism is slidably connected to the trolley chassis; the input end of the transmission mechanism is drivingly connected to the output end of the driving mechanism, and the output end of the transmission mechanism is drivingly connected to the scissor mechanism.

2. The heavy-duty AGV trolley according to claim 1, characterized in that The transmission mechanism includes: a first fixing member, a second fixing member corresponding to the first fixing member, a moving seat, a plurality of lead screw nuts for driving the moving seat to move, and a push rod for driving the scissor mechanism to lift; The first fixing member and the second fixing member are respectively detachably connected to the trolley chassis and the driving assembly; the first fixing member and the second fixing member are symmetrically arranged; both the first fixing member and the second fixing member are provided with guiding grooves for limiting and guiding the moving direction of the moving seat; The trolley chassis is provided with a moving groove for the moving seat to move; the moving seat is slidably received in the moving groove; A plurality of the lead screw nuts are all drivingly connected to the moving seat; a plurality of the lead screw nuts are respectively drivingly connected to the output end of the driving mechanism; A plurality of moving wheels are rotatably arranged on both sides of the moving seat; the moving wheels are respectively slidably received in the corresponding guiding grooves; The push rod is rotatably connected to the moving seat; transmission pins for driving the push rod to lift are arranged on both sides of the moving seat; the two transmission pins are hinged to one end of the push rod; the other end of the push rod is drivingly connected to the scissor mechanism.

3. The heavy-duty AGV cart according to claim 2, characterized in that, The driving mechanism includes: a lead screw for driving a plurality of the lead screw nuts to move, a motor for driving the lead screw to rotate reversely or forwardly, and a mounting seat; The motor is detachably connected to the trolley chassis; the mounting seat is detachably connected to the trolley chassis; One end of the lead screw is fixedly connected to the output end of the motor, and the other end is rotatably connected to the mounting seat; the lead screw is respectively drivingly connected to a plurality of the lead screw nuts; One end of the first fixing member and one end of the second fixing member are respectively detachably connected to both sides of the motor; the other end of the first fixing member and the other end of the second fixing member are respectively detachably connected to both sides of the mounting seat.

4. A heavy-duty AGV according to claim 2, characterized in that: The scissor mechanism includes: a first scissor, a second scissor, a third scissor, a fourth scissor, a connecting shaft, a first connecting plate for increasing the overall support strength, a second connecting plate for increasing the overall support strength, a transmission shaft for connecting with the push rod, a first connecting seat and a second connecting seat; One end of the first scissors fork, one end of the second scissors fork, one end of the third scissors fork, and one end of the fourth scissors fork are respectively hinged to the trolley chassis, and the other ends of the first scissors fork, the second scissors fork, the third scissors fork, and the fourth scissors fork are respectively hinged to the fork arm; The first scissors fork and the second scissors fork are respectively hinged to one end of the connecting shaft; the third scissors fork and the fourth scissors fork are respectively hinged to the other end of the connecting shaft; One end of the first connecting plate is detachably connected to the first scissors fork, and the other end is detachably connected to the third scissors fork; one end of the second connecting plate is detachably connected to the second scissors fork, and the other end is detachably connected to the fourth scissors fork; The first connecting seat is fixedly connected to the first scissors fork; the second connecting seat is fixedly connected to the third scissors fork; one end of the transmission shaft is rotatably connected to the first connecting seat, and the other end is rotatably connected to the second connecting seat; The transmission shaft is rotatably connected to the other end of the push rod.

5. The heavy-duty AGV cart according to claim 2, wherein, There are also provided: a high-position limit switch for identifying whether the scissors mechanism is at the highest position and a low-position limit switch for identifying whether the scissors mechanism is at the lowest position; The high-position limit switch is fixedly connected to the trolley chassis and is located at one end of the moving groove; the low-position limit switch is fixedly connected to the trolley chassis and is located at the other end of the moving groove.

6. The heavy-duty AGV cart according to claim 2, characterized in that, The shape of the push rod is U-shaped; two convex parts are respectively arranged on both sides of the top of the push rod.

7. An overloaded AGV cart according to claim 1, characterized in that, There are also provided: a driving moving mechanism and a driven moving mechanism for driving the AGV trolley to move; The driving moving mechanism is rotatably connected to one end of the bottom of the trolley chassis; the driven moving mechanism is rotatably connected to the other end of the bottom of the trolley chassis.

8. A heavy-duty AGV according to claim 7, characterized in that: The driving moving mechanism includes: a driving caster and a driving member for driving the driving caster to rotate; The driving caster is rotatably connected to the trolley chassis; the driving member is fixedly connected to the trolley chassis; the output end of the driving member is in transmission connection with the driving caster.

9. The heavy-duty AGV cart according to claim 7, wherein, The driven moving mechanism includes: a driven caster; the driven caster is rotatably connected to the trolley chassis.

10. The heavy-duty AGV according to claim 1, characterized in that: An anti-collision detection sensor for preventing the trolley from colliding with an object is also arranged on the outer side of the trolley chassis.

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