An adaptive center of gravity forklift trolley device

Abstract

This utility model discloses an adaptive center-of-gravity forklift lifting trolley device, belonging to the field of transport vehicle technology. It includes a chassis formed by hinged front and rear floating base plates, with drive wheels fixedly connected to the chassis; a second-level overhead platform fixed to the chassis; and a forklift lifting device fixed to the second-level overhead platform. The forklift lifting device includes a crossbar hinged to the second-level overhead platform, with a lifting platform plate connected to the upper end of the crossbar. The moving end of the crossbar is slidably connected to the second-level overhead platform, and a screw drive device drives and controls the moving end of the crossbar. This utility model's trolley device can operate smoothly on uneven ground, adapting to complex ground environments and reducing the risk of cargo tipping. The forklift lifting device, in conjunction with the screw drive device on the second level, enables precise lifting of the lifting platform plate, meeting the needs of different height operations and improving operational flexibility and adaptability. The work platform is replaceable and equipped with different connecting structures, improving handling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automated guided vehicles (AGVs), specifically to an adaptive center of gravity forklift trolley device, which is suitable for scenarios such as hospital pharmacies and warehouses that require precise transportation and automated connection. Background Technology

[0002] In automated logistics systems, traditional forklifts or lifting trolleys have many limitations, such as high requirements for ground flatness. Once they encounter uneven ground, their stability is poor, which can easily lead to the tipping and damage of goods.

[0003] The height adjustment is not flexible enough to meet different work height requirements, making it difficult to accurately connect with various equipment or shelves; moreover, the work platform is usually a fixed structure, which is difficult to adapt to various specifications of goods, thus limiting its applicability and affecting the efficiency and accuracy of goods handling.

[0004] Insufficient chassis stability: Traditional AGVs (Automated Guided Vehicles) use rigid chassis, which cannot adapt to uneven ground, causing the medicines to bounce or even overturn during transportation, making them prone to malfunctions and triggering alarms.

[0005] The lifting mechanism is noisy: conventional scissor lifts rely on cylinders or chains for transmission, with noise levels ≥60dB and poor synchronization, which can easily cause the platform to shake. Utility Model Content

[0006] The purpose of this invention is to provide an adaptive center of gravity forklift trolley device, which mainly improves the stability of the trolley through a floating chassis structure and a forklift lifting device.

[0007] This utility model adopts the following technical solution: an adaptive center of gravity forklift trolley device, comprising:

[0008] The chassis is formed by hinged front and rear floating base plates;

[0009] The drive wheels are fixedly connected to the chassis;

[0010] Two layers of overhead panels are fixed to the chassis;

[0011] A fork-type lifting device is fixed to the second-floor overhead panel;

[0012] The fork-type lifting device includes a crossbar hinged to the second-floor overhead slab, with a lifting platform plate connected to the upper end of the crossbar; the moving end of the crossbar is slidably connected to the second-floor overhead slab, and a screw drive device fixed to the second-floor overhead slab drives and controls the moving end of the crossbar.

[0013] Preferably, the two drive wheels are located on both sides of the front floating base plate, and each drive wheel is controlled by an independent motor.

[0014] Preferably, a caster wheel is installed on each of the front floating base plate and the rear floating base plate at a diagonal position away from the drive wheel.

[0015] Preferably, the front floating base plate and the rear floating base plate are hinged by a double pivot, and a limiting groove is provided between the front floating base plate and the rear floating base plate to limit the vertical floating degree of the front floating base plate and the rear floating base plate.

[0016] Preferably, the front side of the front floating base plate is fixed with a front anti-collision safety contact edge, and the rear side of the rear floating base plate is fixed with a rear anti-collision safety contact edge.

[0017] Preferably, the front side of the lower end of the crossbar is hinged to the second-floor overhead panel, and the rear side of the lower end of the crossbar is a movable end. The movable end is fixed with a sliding connecting block, which is slidably mounted on a linear guide rail, and the linear guide rail is fixed to the second-floor overhead panel.

[0018] The front side of the upper end of the crossbar is hinged to the lifting platform plate, and the rear side of the upper end of the crossbar is slidably connected to the lifting platform plate.

[0019] The crossbar is fixed with a lower limit support block that is vertically opposite to the sliding connecting block. When the crossbar descends to its limit position, the lower limit support block abuts against the sliding connecting block.

[0020] Preferably, the lead screw drive device includes a servo motor, and a ball screw is fixedly connected to the output end of the servo motor; the end of the ball screw near the servo motor is rotatably mounted on the second-layer overhead plate through a lead screw support.

[0021] A nut is installed in the sliding connecting block, and the end of the ball screw away from the servo motor is connected to the nut.

[0022] Preferably, the lifting platform plate has four rectangular material positioning apex corners;

[0023] An obstacle clearance hole is provided on the lifting platform plate. Below the obstacle clearance hole, a second-floor overhead plate is installed. A photoelectric sensor is used to detect whether there are goods on the lifting platform plate through the obstacle clearance hole.

[0024] Preferably, a lidar and a speaker are installed on the second-floor overhead panel.

[0025] Preferably, a battery pack is mounted on the front floating base plate;

[0026] A switching power supply and a central controller are installed on the rear floating base plate.

[0027] The beneficial effects of this utility model are:

[0028] Improved ground adaptability: The trolley device can operate smoothly on uneven ground, adapting to complex ground environments and reducing the risk of cargo tipping over;

[0029] The forklift lifting device, in conjunction with the two-layer screw drive device, enables precise lifting of the lifting platform, meeting the needs of different height operations and improving operational flexibility and adaptability.

[0030] Flexible expansion: The work platform is replaceable and equipped with different connecting structures. The conical positioning structure can be easily adapted to various specifications of goods, enabling fast and accurate loading and unloading, and improving handling efficiency.

[0031] Anti-slip and quiet operation: The silent auxiliary support roller guide wheel and drive wheel are designed with anti-slip texture to optimize the operation and user experience of the trolley and ensure stable and safe operation. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This utility model provides a three-dimensional adaptive center of gravity forklift trolley device. Figure 1 .

[0034] Figure 2 This utility model provides a three-dimensional adaptive center of gravity forklift trolley device. Figure 2 .

[0035] Figure 3 This is a front view of an adaptive center of gravity forklift trolley device according to the present invention.

[0036] Figure 4 This is a right view of an adaptive center of gravity forklift trolley device according to the present invention.

[0037] Figure 5 This is a left view of an adaptive center of gravity forklift trolley device according to the present invention.

[0038] Figure 6 This is a top view of an adaptive center of gravity forklift trolley device according to the present invention.

[0039] Figure 7 This is a bottom view of an adaptive center of gravity forklift trolley device according to the present invention.

[0040] Figure 8This is a schematic diagram showing the connection between the front floating base plate and the rear floating base plate in this utility model.

[0041] Figure 9 This is a schematic diagram showing the connection between the crossbar and the lifting platform plate in this utility model.

[0042] Explanation of reference numerals in the attached diagram: 1. Front floating base plate; 2. Drive wheel; 3. Wheel guard; 4. Rear floating base plate; 5. Switching power supply; 6. Power supply mounting plate; 7. Caster wheel mounting bracket; 8. Rear anti-collision safety edge; 9. Caster wheel; 10. Central controller; 11. Cart charging port; 12. Charging port mounting bracket; 13. Electrical installation guide rail; 14. Ball screw; 15. Linear guide rail; 16. Lower limit support block for lifting; 17. Sliding connecting block; 18. Material positioning top angle; 19. Lifting platform plate; 20. Photoelectric sensor; 21. Crossbar; 22. Oil-free bushing; 23. Shaft end limit plate; 24. Servo motor; 25. Second-layer overhead plate; 26. Battery pack; 27. Battery pack limit bracket; 28. Elevation column; 29. ​​Front anti-collision safety edge; 30. LiDAR; 31. LiDAR mounting bracket; 32. Speaker; 33. Screw support. Detailed Implementation

[0043] 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.

[0044] Example 1:

[0045] Combination Figures 1 to 3 As shown, this utility model provides an adaptive center of gravity forklift trolley device, which mainly includes a chassis and a forklift lifting device mounted on the chassis.

[0046] Combined Figures 4 to 7 As shown, the chassis includes a front floating base plate 1 and a rear floating base plate 4 hinged together. The adjacent ends of the front floating base plate 1 and the rear floating base plate 4 are hinged via symmetrical pivots on both sides. A limit groove is provided between the front floating base plate 1 and the rear floating base plate 4, as shown... Figure 8 As shown. The limiting groove allows the front floating base plate 1 and the rear floating base plate 4 to float within a certain range. The limiting groove is made of nylon material, which limits the floating beyond the limit and also plays a role in buffering impact. The front side of the front floating base plate 1 and the rear side of the rear floating base plate 4 are arc-shaped, and the front anti-collision safety contact edge 29 and the rear anti-collision safety contact edge 8 are fixed thereon.

[0047] Two drive wheels 2 are fixed to either side of the front floating base plate 1, and each drive wheel 2 is covered with a wheel guard 3. Each drive wheel 2 is controlled by an independent motor, and differential steering is achieved by controlling the speed difference between the two drive wheels 2. The drive wheels 2 are rubber-coated drive wheels with a surface designed with anti-slip textures, such as orange peel textured bumps, to improve traction. Figure 7 As shown, a polyurethane caster 9 is installed on the front floating base plate 1 and the rear floating base plate 4 at diagonal positions away from the drive wheel 2 via a caster mounting bracket 7. Together with the drive wheel 2, they provide auxiliary support and steering, reducing the turning radius of the trolley device.

[0048] Combination Figures 1 to 3 As shown, the four corners of the second-floor overhead panel 25 are each fixed to the front floating base plate 1 by a support column 28. There is a certain distance between the second-floor overhead panel 25 and the front floating base plate 1 to facilitate the installation of other components of the trolley device. The forklift lifting device is fixed to the second-floor overhead panel 25.

[0049] Example 2:

[0050] Based on the above embodiment one, combined with Figures 1 to 3 As shown, the forklift device mainly includes a crossbar 21, a screw drive device, and a lifting platform plate 19.

[0051] Combined Figures 4 to 7 As shown, the cross rod 21 has a symmetrical cross-hinged structure. The hinge is connected by a pivot and an oil-free bushing 22, and the pivot is fitted with a shaft end limit plate 23. Figure 3 As shown, the front side of the lower end of the crossbar 21 is hinged to the second-floor overhead panel 25. The rear side of the lower end of the crossbar 21 is a movable end, and a sliding connecting block 17 is fixed to the movable end. The sliding connecting block 17 is slidably mounted on the linear guide rail 15, which is fixed to the second-floor overhead panel 25. The front side of the upper end of the crossbar 21 is hinged to the lifting platform plate 19, and the rear side of the upper end of the crossbar 21 is slidably connected to the slide rail plate, which is fixed to the lower side of the lifting platform plate 19. Figure 9 As shown, a silent auxiliary support roller guide is provided at the connection between the crossbar 21 and the slide plate to reduce friction noise and extend the service life of the crossbar 21. A lower limit support block 16 is fixed on the rear side of the crossbar 21, above the sliding connecting block 17; when the crossbar 21 descends to its limit position, the lower limit support block 16 will abut against the sliding connecting block 17 to limit the descent of the crossbar 21 and prevent damage to other components.

[0052] Combination Figures 1 to 5As shown, the lead screw drive device is used to control the moving end of the crossbar 21, thereby controlling the lifting and lowering of the crossbar 21. The lead screw drive device includes a servo motor 24 fixed on the second-layer overhead plate 25, and the output end of the servo motor 24 is fixedly connected to a ball screw 14. The front end of the ball screw 14 is rotatably mounted on a lead screw support 33, which is fixed on the second-layer overhead plate 25. The rear end of the ball screw 14 is threaded with a nut, which is fixed in the through hole in the middle of the sliding connecting block 17. When the servo motor 24 rotates forward and backward, it drives the ball screw 14 to rotate. The ball screw 14 drives the sliding connecting block 17 to move along the linear guide rail 15 through the nut, thereby controlling the lifting and lowering of the lifting platform plate 19 at the upper end of the crossbar 21.

[0053] Example 3:

[0054] Based on the above-described embodiment two, combined with Figures 1 to 5 As shown, the upper side of the lifting platform plate 19 has four rectangularly arranged material positioning apexes 18. The material positioning apexes 18 are stainless steel conical positioning pins that can match the grooves of the connecting mechanism, achieving a positioning accuracy of ±1mm. The connecting mechanism allows for quick replacement of conveying modules, forks, and other modules, expanding the functionality of the trolley device. The lifting platform plate 19 has a clearance hole, and a photoelectric sensor 20 is installed below the clearance hole. The photoelectric sensor 20 faces the clearance hole and is fixed to the second-layer overhead plate 25, used to detect whether there is cargo on the lifting platform plate 19 through the clearance hole.

[0055] Combination Figures 1 to 5 As shown, the motor, reducer and guide rail are centrally arranged on the second floor to reduce space occupation. A speaker 32 and a lidar mounting bracket 31 are installed on the second-floor overhead panel 25. A lidar 30 is installed on the lidar mounting bracket 31. The lidar 30 is used to detect walking obstacles, and the speaker 32 is used to broadcast abnormalities.

[0056] The chassis layer houses a high-density lithium battery pack and a central control system: a central controller 10 is fixed to the underside of the second-floor overhead panel 25; a battery pack 26 is mounted on the front floating base plate 1, and the battery pack 26 is peripherally limited within the battery pack limiting bracket 27 on the front floating base plate 1. A switching power supply 5 is mounted on the rear floating base plate 4 via a power mounting plate 6, and a trolley charging port 11 is fixed via a charging port mounting bracket 12. An electrical installation rail 13 is also fixed on the rear floating base plate 4.

[0057] Assembly process:

[0058] First, connect the front and rear floating base plates of the trolley device through double rotating shafts and limiting grooves to form a floating chassis, and then install the drive wheels and casters.

[0059] The battery pack and control system are fixed on the chassis layer, and the motor, reducer and other components are installed on the second-floor overhead plate. A screw drive device consisting of ball screws, linear guides and cross rods is also built.

[0060] Assemble the forklift lifting device, connect its fixed side to the fixed support block of the second-floor overhead panel, connect its driving side to the screw drive device, and install the silent auxiliary support roller guide wheel and the lifting platform plate on top (the lifting platform plate and the material positioning top corner are pre-installed).

[0061] Finally, based on the actual material transport requirements, the lifting platform's transport structure can be adjusted. For example, a forklift type can directly transport turnover boxes.

[0062] Operating steps:

[0063] The control system sets the travel path of the trolley device, which then automatically travels to the cargo storage area. The forklift device is used to lift the lifting platform to a suitable height for cargo loading. During loading, the cargo is precisely positioned under the action of the material positioning apex.

[0064] After loading is completed, the control system controls the trolley to travel along the preset route to the target position, and readjusts the height of the lifting platform plate to align with the target docking position, thus initiating the cargo unloading process. At this time, the silent auxiliary support roller guide wheel ensures the smooth and quiet lifting of the lifting platform plate and the sliding of the cargo.

[0065] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An adaptive center-of-gravity forklift lifting trolley device, characterized in that, include: The chassis is formed by hinged front floating base plate (1) and rear floating base plate (4); The drive wheel (2) is fixedly connected to the chassis; The second-layer overhead panel (25) is fixed to the chassis; A fork-type lifting device is fixed on the second-floor overhead panel (25); The fork-type lifting device includes a crossbar (21) hinged to the second-floor overhead plate (25), and the upper end of the crossbar (21) is connected to a lifting platform plate (19); the moving end of the crossbar (21) is slidably connected to the second-floor overhead plate (25), and the screw drive device fixed on the second-floor overhead plate (25) drives and controls the moving end of the crossbar (21).

2. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: The two drive wheels (2) are located on both sides of the front floating base plate (1), and the two drive wheels (2) are controlled by independent motors.

3. The adaptive center of gravity forklift lifting trolley device according to claim 2, characterized in that: A caster wheel (9) is installed on the front floating base plate (1) and the rear floating base plate (4) at a diagonal position away from the drive wheel (2).

4. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: The front floating base plate (1) and the rear floating base plate (4) are hinged by a double pivot. A limiting groove is provided between the front floating base plate (1) and the rear floating base plate (4). The limiting groove is used to limit the degree of vertical floating of the front floating base plate (1) and the rear floating base plate (4).

5. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: The front side of the front floating base plate (1) is fixed with a front anti-collision safety contact edge (29), and the rear side of the rear floating base plate (4) is fixed with a rear anti-collision safety contact edge (8).

6. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: The front side of the lower end of the cross rod (21) is hinged to the second-floor overhead plate (25), and the rear side of the lower end of the cross rod (21) is a movable end. The movable end is fixed with a sliding connecting block (17). The sliding connecting block (17) is slidably installed on the linear guide rail (15), and the linear guide rail (15) is fixed on the second-floor overhead plate (25). The front side of the upper end of the cross bar (21) is hinged to the lifting platform plate (19), and the rear side of the upper end of the cross bar (21) is slidably connected to the lifting platform plate (19). The cross rod (21) is fixed with a lower limit support block (16) that is vertically opposite to the sliding connecting block (17). When the cross rod (21) descends to the limit position, the lower limit support block (16) abuts against the sliding connecting block (17).

7. The adaptive center of gravity forklift lifting trolley device according to claim 6, characterized in that: The lead screw drive device includes a servo motor (24), and a ball screw (14) is fixedly connected to the output end of the servo motor (24); the end of the ball screw (14) near the servo motor (24) is rotatably mounted on the second-floor overhead plate (25) through a lead screw support (33); A nut is installed in the sliding connecting block (17), and the end of the ball screw (14) away from the servo motor (24) is connected to the nut.

8. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: The lifting platform plate (19) is provided with four rectangular material positioning apex corners (18). An obstacle clearance hole is provided on the lifting platform plate (19). A photoelectric sensor (20) is fixed on the second-floor overhead plate (25) below the obstacle clearance hole. The photoelectric sensor (20) is used to detect whether there are goods on the lifting platform plate (19) through the obstacle clearance hole.

9. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: A lidar (30) and a loudspeaker (32) are installed on the second-floor overhead panel (25).

10. The adaptive center of gravity forklift lifting trolley device according to claim 1, characterized in that: A battery pack (26) is installed on the front floating base plate (1). A switching power supply (5) and a central controller (10) are installed on the rear floating base plate (4).

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