Hydraulic lifting type RGV mechanism

Abstract

The hydraulic lifting type RGV trolley mechanism comprises a ground rail and a trolley frame, and a walking driving assembly is arranged on the trolley frame and used for driving the trolley frame to walk on the ground rail; a vertical guide frame is further arranged on the trolley frame, and a lifting stand column capable of ascending and descending is arranged in the guide frame in a sleeved mode. Limiting assemblies of different specifications are detachably installed on a top plate of the lifting stand column and used for bearing and limiting various cargoes. The lifting stand column is hollow, a vertical hydraulic oil cylinder is arranged in the lifting stand column, and the top driving end of the hydraulic oil cylinder is connected with a top plate of the lifting stand column and used for driving the lifting stand column to ascend and descend in the guide frame in a limited mode so as to take and convey goods at different heights. The device has the advantages of being simple and compact in structure, capable of horizontally moving and lifting and high in applicability.

Description

Technical Field

[0001] This invention relates to the field of logistics and warehousing technology, specifically to a hydraulic lifting RGV trolley mechanism. Background Technology

[0002] Hydraulically driven RGV carts are common material handling equipment in factory workshops, warehousing and logistics scenarios. Their technological development has always revolved around how to efficiently and flexibly connect different workstations and work surfaces at different heights. Traditional manual hydraulic pallet trucks, while simple in structure, rely on manual operation, resulting in low efficiency and high labor intensity. While existing carts achieve directional and efficient planar transport, their functions and structures still have significant limitations when dealing with complex spatial access requirements. However, the existing technology faces the following technical problems: First, existing RGV carts have limited handling capabilities and lack vertical adjustment. Most traditional RGV carts can only transport goods horizontally back and forth, with a fixed platform height. When goods need to be accessed from shelves, production lines, or workbenches at different heights, additional lifting equipment (such as lifting platforms or forklifts) or manual assistance is required. This "horizontal transport + external lifting" model leads to interruptions in the workflow, increases the number of steps, and severely restricts the efficiency and continuity of overall material flow.

[0003] Secondly, existing RGV trolleys with integrated lifting functions have bulky structures and poor space adaptability. Some lifting RGVs or handling devices designed to solve height adjustment problems typically use integrated lifting platforms or large scissor mechanisms. While these structures can achieve lifting, they result in a large overall size and increased weight. Some RGV devices with built-in lifting platforms require wider operating channels and more robust track foundations due to their large size, which is not only costly but also cannot be flexibly applied to compact small and medium-sized workshops, warehouses, or production line gaps, greatly limiting their applicable scenarios.

[0004] Third, existing RGV trolleys with integrated lifting functions have poor cargo adaptability and fixed limit protection functions. The cargo platform or fork structure of existing equipment is mostly welded and fixed, and its size and limit mechanism are designed for specific pallet or cargo specifications. When the size and shape of the transferred cargo changes, the existing limit devices cannot effectively restrain the cargo, posing a risk of slippage. To adapt to various cargo types, it is often necessary to replace the entire vehicle or carry out cumbersome mechanical modifications, resulting in poor flexibility and increased use and maintenance costs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a hydraulic lifting RGV trolley mechanism with a simple and compact structure, which can both translate and lift, and has strong applicability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hydraulic lifting RGV trolley mechanism includes a ground rail and a trolley frame. The trolley frame is equipped with a travel drive assembly for driving the trolley frame to travel on the ground rail. The trolley frame is also equipped with an upright guide frame, and a liftable lifting column is fitted inside the guide frame. Different specifications of limiting components are detachably installed on the top plate of the lifting column for carrying and limiting various goods. The lifting column is hollow and has an upright hydraulic cylinder inside. The top drive end of the hydraulic cylinder is connected to the top plate of the lifting column for driving the lifting column to move up and down within the guide frame to pick up and deliver goods of different heights.

[0007] As a further improvement to the above technical solution: The guide frame includes a hollow guide frame and four guide columns. The bottom of the guide frame is mounted on the trolley frame via the four guide columns. The top of the guide frame is provided with four guide seats. Each guide seat is provided with a guide wheel that contacts the side wall of the lifting column to limit and guide the lifting column during lifting.

[0008] At least one side wall of the guide frame is provided with a protruding limit switch; the limit switch is electrically connected to the walking drive assembly to monitor the walking distance of the trolley frame and stop the walking drive assembly from driving.

[0009] The lifting column is equipped with guide rails on all four sides to cooperate with the guide wheels, and a mirror sensor is provided on the top plate of the lifting column to detect the position of the goods.

[0010] The bottom surface of the lifting column top plate is provided with a first cylinder seat for connecting with the top drive end of the hydraulic cylinder, and the trolley frame is provided with a second cylinder seat for connecting with the bottom of the hydraulic cylinder.

[0011] The trolley frame includes two parallel frame rods, each of which corresponds to a ground rail. The two frame rods are fixedly connected by multiple connectors. The travel drive assembly includes a travel motor, two driven wheel assemblies, and two driving wheel assemblies. The two driven wheel assemblies are respectively located at the front end of the two frame rods and are respectively supported on the two ground rails. The two driving wheel assemblies are respectively located at the rear end of the two frame rods and are respectively supported on the two ground rails. The travel motor is vertically fixed between the two frame rods, and its drive end is connected to the connecting shaft between the two driving wheel assemblies through a gear component.

[0012] The trolley frame is equipped with a crash shield that covers the walking motor. The crash shield has a protruding first buffer to provide shock absorption for the trolley frame that is being transported to its position.

[0013] The trolley frame is equipped with a ground rail impact head assembly, which includes at least two buffer brackets fixed to the trolley frame. At least one buffer bracket is equipped with two oppositely arranged clamps, and at least another buffer bracket is equipped with two oppositely arranged ground rail wheels. The two clamps and the two ground rail wheels are respectively arranged on both sides of the ground rail in a clamping manner to form a limiting protection.

[0014] It also includes multiple placement platforms set on the ground rail, the multiple placement platforms having different heights, each placement platform being a door frame type for being erected on the ground rail, and each placement platform having detachable limit components of different specifications installed on its top plate for supporting and limiting various goods.

[0015] It also includes multiple anti-collision platforms installed on the ground rail. Each anti-collision platform is in the shape of a door frame for installation on the ground rail. One side of the anti-collision platform is located close to the placement platform, and the other side is provided with multiple protruding second buffers to form shock absorption and buffer for the transported trolley frame.

[0016] Compared with the prior art, the advantages of the present invention are as follows: Firstly, the hydraulic lifting RGV trolley mechanism of this invention features a walking drive assembly and a guide frame mounted on the trolley frame. A lifting column is installed within the guide frame, allowing the trolley frame to move horizontally along the ground track under the drive of the walking drive assembly. The lifting column is then limited and raised / lowered within the guide frame under the drive of the hydraulic cylinder. This integrates both horizontal movement and lifting functions, enabling a single trolley to directly connect with goods of different heights, achieving three-dimensional direct material transport, completely eliminating intermediate transfer links, and greatly improving transfer efficiency.

[0017] Secondly, the hydraulic lifting RGV trolley mechanism of this invention employs a nested "nested" structure where the guide frame, lifting column, and hydraulic cylinder are coaxially arranged. The hydraulic cylinder, as the power core, is placed in the innermost layer, driving the middle lifting column to smoothly extend and retract under the strict constraint of the outer guide frame. While strictly ensuring guiding accuracy and lifting stability, it greatly reduces the lateral space occupied, making the overall structure of the equipment compact and easily adaptable to narrow or height-restricted spaces where traditional large lifting equipment cannot access.

[0018] Thirdly, the hydraulic lifting RGV trolley mechanism of this invention uses a detachable limiting component mounted on the top plate of the lifting column to support and limit goods of various sizes. Depending on the specific size and shape of the goods to be transported (such as pallets, bins, rolls, etc.), appropriate limiting blocks, guardrails, or clamps can be flexibly selected and installed. This design allows a single trolley to safely and stably carry multiple types of goods, greatly enhancing the trolley's applicability and reducing the cost for users to configure specialized equipment for different materials.

[0019] Fourthly, the hydraulic lifting RGV trolley mechanism of this invention, by setting a hollow guide frame and four guide columns, allows the lifting column to be placed inside the guide frame. The guide frame and guide columns guide and limit the lifting of the lifting column. The structure is simple and compact, easy to maintain, and the four-sided enclosed guide frame has a good limiting effect, maintaining the stability of the trolley even when carrying heavy loads. Furthermore, by setting guide wheels on each guide seat corresponding to the side wall of the lifting column, the lifting column rolls in contact with the guide seat, making the lifting process of the lifting column smoother.

[0020] Fifth, the hydraulic lifting RGV trolley mechanism of the present invention monitors the travel distance of the trolley frame and controls the start and stop of the travel drive component by setting a protruding limit switch, making the trolley more intelligent and the transportation process more convenient and faster.

[0021] Sixth, the hydraulic lifting RGV trolley mechanism of this invention further limits and guides the lifting column by setting matching guide rails on the four side walls of the lifting column, thereby improving the lifting stability. It is suitable for working conditions when carrying heavy loads, greatly improving the stability and reliability of the trolley. By setting a reverse sensor to detect the position of the load, the lifting column can be lifted and lowered accurately, greatly improving the reliability of the trolley.

[0022] Seventh, the hydraulic lifting RGV trolley mechanism of the present invention connects the hydraulic cylinder and the lifting column by setting a first cylinder seat, so that the hydraulic cylinder can stably push the top plate of the lifting column to rise and fall when it starts. By setting a second cylinder seat, the hydraulic cylinder is connected to the trolley frame. Using the trolley frame to support the hydraulic cylinder makes the lifting and falling of the hydraulic cylinder more stable, which is suitable for the transportation of heavy goods.

[0023] Eighth, the hydraulic lifting RGV trolley mechanism of this invention, through the combination of two ground rails and two frame rods, makes the trolley operation more stable and less prone to tipping over. Furthermore, the space formed between the frame rods can be used to install a walking motor to drive the drive wheel assembly, making the overall structure more compact, easier to manufacture, and very lightweight, thus reducing manufacturing costs.

[0024] Ninth, the hydraulic lifting RGV trolley mechanism of the present invention provides buffer protection for the walking motor by setting a crash shield covering the walking motor and a first buffer protruding outside the crash shield, so as to avoid the walking motor from colliding with the trolley frame and causing damage when the vehicle stops in place, thus greatly improving the reliability and stability of the device.

[0025] The tenth aspect of this invention is the hydraulic lifting RGV trolley mechanism. By setting ground rail guide wheels that cooperate with the two sides of the ground rail, a guiding function is formed, providing accurate guidance and positioning to ensure accurate running trajectory. Two clamps located on both sides of the ground rail constrain the lateral position of the traveling wheels on the rail surface, preventing them from slipping laterally off the track. These clamps, working in conjunction with the ground rail guide wheels, prevent the trolley from derailing and tipping over, greatly improving the stability and safety of the trolley. By setting two buffer brackets to respectively install the clamps and ground rail guide wheels, manufacturing and installation costs are significantly reduced. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural principle diagram of the hydraulic lifting RGV trolley mechanism of the present invention during use.

[0027] Figure 2 This is a three-dimensional structural schematic diagram of the hydraulic lifting RGV trolley mechanism of the present invention.

[0028] Figure 3 This is a three-dimensional structural schematic diagram of some components of the hydraulic lifting RGV trolley mechanism of the present invention.

[0029] Figure 4 This is a three-dimensional structural principle diagram of the guide frame of the present invention.

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the lifting column of the present invention.

[0031] Figure 6 This is a side view schematic diagram of the lifting column structure of the present invention.

[0032] The labels in the diagram represent: 1. Car frame; 11. Second cylinder seat; 12. Frame rod; 13. Anti-collision frame; 14. First buffer component; 15. Connecting component; 2. Walking drive assembly; 21. Walking motor; 22. Driven wheel assembly; 23. Drive wheel assembly; 3. Guide frame; 31. Guide frame; 32. Guide column; 33. Guide seat; 34. Guide wheel; 35. Limit switch; 4. Lifting column; 41. Limit assembly; 42. Hydraulic cylinder; 43. Guide rail; 44. First cylinder seat; 45. Mirror sensor; 5. Ground rail; 6. Ground rail impact head assembly; 61. Buffer bracket; 62. Clamp hook; 63. Ground rail guide wheel; 7. Placement platform; 8. Anti-collision platform; 81. Second buffer component. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] like Figures 1 to 6 As shown, the hydraulic lifting RGV trolley mechanism of this embodiment includes a ground rail 5 and a trolley frame 1. The trolley frame 1 is provided with a walking drive assembly 2 for driving the trolley frame 1 to move on the ground rail 5. The trolley frame 1 is also provided with an upright guide frame 3, and a liftable lifting column 4 is fitted inside the guide frame 3. Different specifications of limiting components 41 are detachably installed on the top plate of the lifting column 4 for carrying and limiting various goods. The lifting column 4 is hollow and has an upright hydraulic cylinder 42 inside. The top drive end of the hydraulic cylinder 42 is connected to the top plate of the lifting column 4 for driving the lifting column 4 to move up and down within the guide frame 3 to pick up and deliver goods of different heights.

[0038] The specific implementation principle is as follows: In use, the walking drive assembly 2 is activated to drive the trolley frame 1 to walk on the ground rail 5 to the designated position. Then, the hydraulic cylinder 42 is activated to drive the top plate of the lifting column 4 to rise and fall, so that the lifting column 4 can rise and fall stably within the guide frame 3 to pick up and deliver goods of different heights.

[0039] Through the aforementioned scientific and special design, this hydraulic lifting RGV trolley mechanism has the following advantages: Firstly, by setting a walking drive component 2 and a guide frame 3 on the trolley frame 1, and setting a lifting column 4 inside the guide frame 3, the trolley frame 1 can move horizontally along the ground rail 5 under the drive of the walking drive component 2. Under the drive of the hydraulic cylinder 42, the lifting column 4 is limited to rise and fall within the guide frame 3. This allows the trolley to integrate the two major functions of horizontal movement and lifting, enabling a single trolley to directly connect with goods of different heights, realize three-dimensional direct material transportation, completely eliminate intermediate transfer links, and greatly improve transfer efficiency.

[0040] Secondly, by setting up a nested "nested" structure with the guide frame 3, lifting column 4, and hydraulic cylinder 42 coaxially, the hydraulic cylinder 42, as the power core, is placed in the innermost layer, driving the middle lifting column 4 to smoothly extend and retract under the strict constraint of the outer guide frame 3. While strictly ensuring guiding accuracy and lifting stability, it greatly reduces the lateral space occupied, making the overall structure of the equipment compact and easily applicable to narrow or height-restricted spaces that traditional large lifting equipment cannot access.

[0041] Thirdly, the detachable limiting component 41 installed on the top plate of the lifting column 4 is used to support and limit goods of various sizes. Depending on the specific size and shape of the goods to be transported (such as pallets, bins, rolls, etc.), appropriate limiting blocks, guardrails, or clamps can be flexibly selected and installed. This design allows a single trolley to safely and stably carry multiple types of goods, greatly enhancing the trolley's applicability and reducing the cost for users to configure specialized equipment for different materials.

[0042] like Figure 2 , Figure 4 As shown, in this embodiment, the guide frame 3 includes a hollow guide frame 31 and four guide posts 32. The bottom of the guide frame 31 is mounted on the trolley frame 1 via the four guide posts 32. The top of the guide frame 31 is provided with four guide seats 33. Each guide seat 33 is provided with a guide wheel 34 that contacts the side wall of the lifting column 4 to limit and guide the lifting column 4 during lifting. By setting the hollow guide frame 31 and four guide posts 32, the lifting column 4 can be placed inside the guide frame 3, and the lifting of the lifting column 4 is guided and limited by the guide frame 31 and guide posts 32. The structure is simple and compact, easy to maintain, and the four-sided enclosed limiting guide frame 3 has a good limiting effect, maintaining the stability of the trolley even when carrying heavy goods. Furthermore, by providing guide wheels 34 that contact the side wall of the lifting column 4 on each guide seat 33, the lifting column 4 rolls in contact with the guide seat 33, making the lifting process of the lifting column 4 smoother.

[0043] like Figure 2 , Figure 4As shown, in this embodiment, at least one side wall of the guide frame 31 is provided with a protruding limit switch 35; the limit switch 35 is electrically connected to the walking drive assembly 2 to monitor the walking distance of the trolley frame 1 and stop the walking drive assembly 2. By setting the protruding limit switch 35 to monitor the walking distance of the trolley frame 1 and control the start and stop of the walking drive assembly 2, the trolley becomes more intelligent, and the transportation process becomes more convenient and faster.

[0044] like Figure 2 , Figure 4 , Figure 5 As shown, in this embodiment, guide rails 43 that cooperate with guide wheels 34 are provided on all four side walls of the lifting column 4, and a mirror-reflection sensor 45 is provided on the top plate of the lifting column 4 for detecting the position of the goods. By providing cooperating guide rails 43 on the four side walls of the lifting column 4, the lifting column 4 is further limited and guided during lifting, thereby further improving the lifting stability. This is suitable for working conditions when carrying heavy goods, and greatly improves the stability and reliability of the trolley. By setting the mirror-reflection sensor 45 to detect the position of the goods, the lifting column 4 is lifted and lowered accurately, greatly improving the reliability of the trolley.

[0045] like Figure 2 As shown, in this embodiment, a first cylinder seat 44 is provided on the bottom surface of the top plate of the lifting column 4 for connection to the top drive end of the hydraulic cylinder 42, and a second cylinder seat 11 is provided on the trolley frame 1 for connection to the bottom of the hydraulic cylinder 42. By setting the first cylinder seat 44 to connect the hydraulic cylinder 42 and the lifting column 4, the hydraulic cylinder 42 can stably push the top plate of the lifting column 4 to rise and fall when it starts. By setting the second cylinder seat 11 to connect the hydraulic cylinder 42 to the trolley frame 1, the trolley frame 1 supports the hydraulic cylinder 42, making the lifting and falling of the hydraulic cylinder 42 more stable, which is suitable for the transportation of heavy goods.

[0046] like Figure 2 , Figure 3As shown, in this embodiment, the trolley frame 1 includes two parallel frame rods 12, each frame rod 12 corresponding to a ground rail 5. The two frame rods 12 are fixedly connected by multiple connectors 15. The driving assembly 2 includes a driving motor 21, two driven wheel assemblies 22, and two driving wheel assemblies 23. The two driven wheel assemblies 22 are respectively located at the front ends of the two frame rods 12 and are respectively supported on the two ground rails 5. The two driving wheel assemblies 23 are respectively located at the rear ends of the two frame rods 12 and are respectively supported on the two ground rails 5. The driving motor 21 is vertically fixed between the two frame rods 12, and its driving end is connected to the connecting shaft between the two driving wheel assemblies 23 through a gear component. By setting two ground rails 5 and two frame rods 12 in cooperation, the trolley's operation is more stable and less prone to tipping over. Furthermore, the space formed between the frame rods 12 can be used to install the walking motor 21 to drive the drive wheel assembly 23 to rotate, making the overall structure more compact, easier to manufacture, and very lightweight, which helps to reduce manufacturing costs.

[0047] like Figure 2 , Figure 3 As shown, in this embodiment, the trolley frame 1 is provided with a crash shield 13 that covers the travel motor 21. The crash shield 13 is provided with a protruding first buffer 14 to provide shock absorption for the trolley frame 1 when it is transported to the designated position. By providing the crash shield 13 covering the travel motor 21 and the first buffer 14 protruding outside the crash shield 13, the travel motor 21 is buffered and protected, preventing the travel motor 21 from colliding with the trolley frame 1 and causing damage when it stops after being transported to the designated position. This greatly improves the reliability and stability of the device.

[0048] like Figure 2 , Figure 3 As shown, in this embodiment, the trolley frame 1 is equipped with a ground rail impact head assembly 6. The ground rail impact head assembly 6 includes at least two buffer brackets 61 fixed to the trolley frame 1 (of course, more than two buffer brackets 61 can be provided, and buffer brackets 61 can be provided at all four corners of the trolley frame 1 to further improve the safety of the trolley). At least one buffer bracket 61 is equipped with two oppositely arranged clamps 62, and at least another buffer bracket 61 is equipped with two oppositely arranged ground rail guide wheels 63. The two clamps 62 and the two ground rail guide wheels 63 are respectively arranged in a clamping position on both sides of the ground rail 5 to form a limiting protection. By setting the ground rail guide wheels 63 to cooperate with the two sides of the ground rail 5, a guiding effect is formed to accurately guide and position, ensuring accurate running trajectory. By setting the two clamps 62 on both sides of the ground rail 5, the lateral position of the traveling wheels on the rail surface is constrained to prevent them from sliding laterally off the rail. Working together with the ground rail guide wheels 63, they prevent the trolley from derailing and overturning, greatly improving the stability and safety of the trolley. By setting two buffer brackets 61 to install the clamp 62 and the ground rail wheel 63 respectively, the manufacturing and installation costs are greatly reduced.

[0049] Preferably, the buffer bracket 61 is equipped with a wire brush near the top surface of the ground rail 5. The wire brush continuously cleans dust, gravel, snow, and other debris from the rail surface, providing a clean contact surface for the ground rail guide wheel 63 and the traveling wheel. This greatly improves guiding accuracy, reduces traveling resistance, and significantly reduces the risk of jamming or derailment caused by debris, extending the service life of the trolley wheel assembly and the rail.

[0050] like Figure 1 As shown, this embodiment also includes multiple placement platforms 7 mounted on the ground rail 5. These platforms 7 have different heights, and each platform 7 is portal-shaped for mounting on the ground rail 5. Each platform 7 also has detachably mounted limiting components 41 of different specifications on its top plate for supporting and limiting various goods. By setting multiple portal-shaped placement platforms 7 of different heights, a transportation system is formed. Goods are transported between the platforms 7 of different heights using a trolley, facilitating integration with different external equipment and greatly improving transportation efficiency.

[0051] like Figure 1 As shown, this embodiment also includes multiple anti-collision platforms 8 mounted on the ground rail 5. Each anti-collision platform 8 is portal-shaped for mounting on the ground rail 5. One side of the anti-collision platform 8 is located near the placement platform 7, and the other side has multiple protruding second buffers 81 to provide shock absorption for the transported trolley frame 1. By setting up the anti-collision platforms 8, shock absorption is provided for both the placement platform 7 and the trolley frame 1, greatly improving the stability and safety of the trolley transportation process.

[0052] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A hydraulic lifting RGV trolley mechanism, characterized in that: Includes a ground rail (5) and a trolley frame (1). The trolley frame (1) is equipped with a walking drive assembly (2) for driving the trolley frame (1) to move on the ground rail (5). The trolley frame (1) is also equipped with an upright guide frame (3). The guide frame (3) is fitted with a liftable lifting column (4). The top plate of the lifting column (4) is detachably equipped with limiting components (41) of different specifications for carrying and limiting various goods. The lifting column (4) is hollow and has an upright hydraulic cylinder (42) inside. The top drive end of the hydraulic cylinder (42) is connected to the top plate of the lifting column (4) for driving the lifting column (4) to limit the lifting and lowering within the guide frame (3) to pick up and deliver goods of different heights.

2. The hydraulic lifting RGV trolley mechanism according to claim 1, characterized in that: The guide frame (3) includes a hollow guide frame (31) and four guide columns (32). The bottom of the guide frame (31) is mounted on the trolley frame (1) through the four guide columns (32). The top of the guide frame (31) is provided with four guide seats (33). Each guide seat (33) is provided with a guide wheel (34) that contacts the side wall of the lifting column (4) to limit and guide the lifting column (4) during lifting.

3. The hydraulic lifting RGV trolley mechanism according to claim 2, characterized in that: The guide frame (31) has a protruding limit switch (35) on at least one side wall; the limit switch (35) is electrically connected to the walking drive assembly (2) to monitor the walking distance of the trolley frame (1) and stop the walking drive assembly (2) from driving.

4. The hydraulic lifting RGV trolley mechanism according to claim 2, characterized in that: The lifting column (4) is provided with guide rails (43) on all four sides to cooperate with guide wheels (34), and a mirror sensor (45) is provided on the top plate of the lifting column (4) to detect the position of the goods.

5. The hydraulic lifting RGV trolley mechanism according to claim 2, characterized in that: The top plate of the lifting column (4) is provided with a first cylinder seat (44) for connecting with the top drive end of the hydraulic cylinder (42), and the trolley frame (1) is provided with a second cylinder seat (11) for connecting with the bottom of the hydraulic cylinder (42).

6. The hydraulic lifting RGV trolley mechanism according to claim 1, characterized in that: The trolley frame (1) includes two parallel frame rods (12), each frame rod (12) is matched with a ground rail (5), and the two frame rods (12) are fixedly connected by multiple connectors (15). The walking drive assembly (2) includes a walking motor (21), two driven wheel assemblies (22) and two driving wheel assemblies (23). The two driven wheel assemblies (22) are respectively located at the front end of the two frame rods (12) and are respectively supported on the two ground rails (5). The two driving wheel assemblies (23) are respectively located at the rear end of the two frame rods (12) and are respectively supported on the two ground rails (5). The walking motor (21) is vertically fixed between the two frame rods (12), and the driving end is connected to the connecting shaft between the two driving wheel assemblies (23) through a gear component.

7. The hydraulic lifting RGV trolley mechanism according to claim 6, characterized in that: The trolley frame (1) is provided with a crash shield (13) that covers the walking motor (21). The crash shield (13) is provided with a protruding first buffer (14) to form shock absorption and buffer for the trolley frame (1) in place.

8. The hydraulic lifting RGV trolley mechanism according to claim 1, characterized in that: The trolley frame (1) is provided with a ground rail impact head assembly (6). The ground rail impact head assembly (6) includes at least two buffer brackets (61) fixed on the trolley frame (1). At least one buffer bracket (61) is equipped with two oppositely arranged clamps (62), and at least another buffer bracket (61) is equipped with two oppositely arranged ground rail wheels (63). The two clamps (62) and the two ground rail wheels (63) are respectively arranged on both sides of the ground rail (5) in a clamping manner to form a limiting protection.

9. The hydraulic lifting RGV trolley mechanism according to claim 1, characterized in that: It also includes multiple placement platforms (7) set on the ground rail (5), the multiple placement platforms (7) having different heights, each of the placement platforms (7) being a door frame type for being erected on the ground rail (5), and each of the placement platforms (7) having detachable limit components (41) of different specifications installed on the top plate for carrying and limiting various goods.

10. The hydraulic lifting RGV trolley mechanism according to claim 9, characterized in that: It also includes multiple anti-collision platforms (8) set on the ground rail (5). Each anti-collision platform (8) is in the shape of a door frame for mounting on the ground rail (5). One side of the anti-collision platform (8) is set close to the placement platform (7), and the other side is provided with multiple protruding second buffers (81) for shock absorption and buffering of the transported trolley frame (1).

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