Electric medical cart with force sensing assistance

Abstract

The utility model discloses a kind of electric medical trolley with force sense walking aid function, including electric trolley body, the bottom surface of electric trolley body is equipped with by motor-driven drive shaft and universal wheel, directional wheel is installed on drive shaft, power supply is equipped in electric trolley body, walking aid mechanism is equipped on electric trolley body;Walking aid mechanism includes push hand, moving block, first connecting rod, second connecting rod, slider and walking aid wheel, moving block is connected with connecting plate, connecting plate is connected with push rod, push rod is connected with pressing plate, the circumferential surface of push hand is equipped with spring, walking aid wheel and drive shaft are fixedly connected with connecting shaft between it.This utility model has the function of walking aid, can save electric power, play the role of prolonging equipment endurance, push hand is pushed, big thumb part is pushed to pressing plate, pressing plate drives moving block to move, moving block further drives walking aid wheel to rotate by first connecting rod and second connecting rod, walking aid wheel further drives directional wheel to move, can save electric power while walking aid.

Description

Technical Field

[0001] This utility model belongs to the field of medical trolley technology, and in particular relates to an electric medical trolley with force-sensing walking assistance function. Background Technology

[0002] Medical trolleys are protective medical transport devices used in wards, primarily for transporting surgical instruments, medications, and patients. They are suitable for hospitals, clinics, pharmacies, and other medical institutions. Based on material, they can be categorized into ABS, stainless steel, and powder-coated types, and their functions cover dozens of scenarios including emergency care, treatment, medication delivery, and waste disposal.

[0003] Existing medical trolleys, designed for ease of use and labor-saving by medical staff, typically include a drive mechanism and a power supply. The drive mechanism rotates the directional wheels for constant speed movement, while the power supply provides power to the drive mechanism and can also charge and store electricity. However, in real-world scenarios, users may only require intermittent assistance (e.g., sufficient manpower for light loads on flat ground, but assistance is needed for uphill or heavy loads). The all-electric mode consumes continuous power, significantly reducing the trolley's range. Furthermore, if the all-electric mode malfunctions (e.g., due to accidental button presses), it may cause sudden acceleration, posing a higher risk, especially in crowded hospital environments. To address these issues, we propose an electric medical trolley with force-sensing assistive walking functionality. Utility Model Content

[0004] The purpose of this invention is to provide an electric medical trolley with force-sensing walking assistance function to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to an electric medical trolley with force-sensing walking assistance function. It includes an electric trolley body, a drive shaft driven by a motor, and two omnidirectional wheels on the bottom surface of the trolley body. Two directional wheels are fixedly mounted on the drive shaft. A power supply is located inside the electric trolley body. An assistive mechanism is provided on the electric trolley body. The assistive mechanism includes a pusher, a moving block, a first connecting rod, a second connecting rod, a slider, and assistive wheels. The moving block is sleeved on the periphery of the pusher. A connecting plate is fixedly connected between the two moving blocks. A push rod is fixedly connected to one surface of the connecting plate. A pressure plate is fixedly connected to one end of the push rod. A spring is provided on the periphery of the pusher. The moving block and the slider are hinged to the first connecting rod. The assistive wheels and the slider are hinged to the second connecting rod. A connecting shaft is fixedly connected between the assistive wheels and the drive shaft, which can push the pressure plate to drive the directional wheels to rotate, providing additional driving force to the directional wheels.

[0007] Preferably, a main gear is fixedly connected to the output end of the motor, and a secondary gear is fixedly connected to the circumferential side of the drive shaft. The main gear and the secondary gear mesh to drive the directional wheel to rotate, thereby causing the electric trolley body to move at a constant speed.

[0008] Preferably, guide rails are fixedly connected to both sides of the electric trolley body, and the slider is installed in the guide rails, with the slider slidingly engaging with the guide rails.

[0009] Preferably, limit grooves are provided on both sides of the guide rail, and limit blocks are slidably connected in the limit grooves. The limit blocks are fixedly connected to the slider, and the limit blocks limit the slider within the guide rail to prevent the slider from falling out of the guide rail.

[0010] Preferably, the moving block slides in conjunction with the pusher, and the moving block has several spherical grooves, in which rolling balls are connected. The rolling balls are used to achieve rolling friction and reduce the friction between the moving block and the pusher.

[0011] Preferably, the push rod is slidably engaged with the pusher.

[0012] This utility model has the following beneficial effects:

[0013] This utility model has a walking assistance function, which can save electricity and extend the device's battery life. Specifically, it is designed with a spring, a moving block, a first link, a second link, and a walking wheel. When the electric trolley is under heavy load on flat ground or going uphill, the pusher pushes the handle while the thumb pushes the pressure plate. The pressure plate drives the moving block to move, and the moving block further drives the walking wheel to rotate through the first and second links. The walking wheel further drives the directional wheel to move. Under the action of inertia, the electric trolley will continue to move forward without continuous electric drive. It can save electricity while assisting walking. In addition, the spring provides force feedback to the user, and the amount of walking assistance force of the electric trolley can be adjusted according to the amount of pushing force of the user.

[0014] This invention enables timely braking of an electric trolley. Specifically, it involves setting up a pressure plate, a first connecting rod, a second connecting rod, and a walking wheel. When the user presses the pressure plate down completely, it adheres to the push handle, preventing the pressure plate from resetting. At this point, the walking wheel can no longer rotate, thus preventing the directional wheel from rotating. This allows the electric trolley to achieve braking without the need for a brake assembly on the universal wheels, providing timely protection and preventing sudden acceleration of the equipment that could lead to dangerous situations.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the walking aid mechanism of this utility model;

[0020] Figure 4 This is a cross-sectional view of the movable block of this utility model.

[0021] Figure 5 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0022] The components represented by each number in the attached diagram are listed below: 1. Electric trolley body; 2. Push handle; 3. Power supply; 4. Fixed wheel; 5. Universal wheel; 6. Moving block; 7. Spring; 8. Connecting plate; 9. Push rod; 10. Pressure plate; 11. Guide rail; 12. Limiting groove; 13. First connecting rod; 14. Second connecting rod; 15. Assist wheel; 16. Drive shaft; 17. Motor; 18. Main gear; 19. Secondary gear; 20. Connecting shaft; 21. Slider; 22. Ball bearing; 23. Limiting block. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "middle", "outer", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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 utility model.

[0025] Please see Figures 1-5As shown, this utility model is an electric medical trolley with force-sensing walking assistance function, including an electric trolley body 1. The bottom surface of the electric trolley body 1 is provided with a drive shaft 16 driven by a motor 17 and two universal wheels 5. The universal wheels 5 are used to adjust the movement direction of the electric trolley body 1. Two directional wheels 4 are fixedly installed on the drive shaft 16. A power supply 3 is provided inside the electric trolley body 1. The power supply 3 is electrically connected to the motor 17 to provide power to the motor 17. The electric trolley body 1 is provided with a walking assistance mechanism. A main gear 18 is fixedly connected to the output end of the motor 17. A secondary gear 19 is fixedly connected to the peripheral side of the drive shaft 16. The main gear 18 and the secondary gear 19 mesh. When the user presses the button, the motor 17 is started. The motor 7 drives the main gear 18 to rotate. The main gear 18 meshes with the secondary gear 19, causing the secondary gear 19 to drive the drive shaft 16 to rotate, which in turn drives the directional wheels 4 to rotate, causing the electric trolley body 1 to move at a constant speed.

[0026] The walking aid mechanism includes a pusher 2, a moving block 6, a first connecting rod 13, a second connecting rod 14, a slider 21, and a walking wheel 15. Guide rails 11 are fixedly connected to both sides of the electric trolley body 1. The slider 21 is installed in the guide rail 11. The guide rail 11 guides and limits the slider 21, so that it can only move in the vertical direction. The slider 21 slides with the guide rail 11. Limiting grooves 12 are opened on both sides of the guide rail 11. Limiting blocks 23 are slidably connected in the limiting grooves 12. The limiting blocks 23 are fixedly connected to the slider 21. The limiting blocks 23 limit the slider 21 in the guide rail 11 to prevent the slider 21 from falling out of the guide rail 11.

[0027] A movable block 6 is fitted onto the circumferential side of the pusher 2, and the movable block 6 slides with the pusher 2. Several spherical grooves are formed inside the movable block 6, and rolling balls 22 are connected within these grooves. The rolling balls 22 are used to achieve rolling friction, reducing friction between the movable block 6 and the pusher 2, making the movable block 6 slide more smoothly. A connecting plate 8 is fixedly connected between two movable blocks 6, allowing the two movable blocks 6 to slide synchronously. A push rod 9 is fixedly connected to one surface of the connecting plate 8, with one end of the push rod 9 penetrating the pusher 2. The push rod 9 slides with the pusher 2, pushing... One end of the lever 9 is fixedly connected to a pressure plate 10. A spring 7 is provided on the periphery of the pusher 2. When the moving block 6 moves, it will compress the spring 7. The greater the compression of the spring 7, the greater the resistance felt by the user, which means that the force is also greater, thus realizing the function of force feedback. The moving block 6 and the slider 21 are both hinged to the first connecting rod 13. The walking wheel 15 and the slider 21 are both hinged to the second connecting rod 14. A connecting shaft 20 is fixedly connected between the walking wheel 15 and the drive shaft 16, which can push the pressure plate 10 to drive the directional wheel 4 to rotate, providing additional driving force for the directional wheel 4.

[0028] Working principle:

[0029] The user places their palm over the push handle 2, allowing their thumb to push the pressure plate 10. When the load is heavy, the user can push the push handle 2 while simultaneously pushing the pressure plate 10 with their thumb. The pressure plate 10 then moves the connecting plate 8 via the push rod 9. The connecting plate 8 further moves the moving block 6, which compresses the spring 7, providing force feedback to the user. As the moving block 6 moves to one side of the electric trolley body 1, it drives the slider 21 downwards via the first connecting rod 13. The slider 21 then drives the walking wheel 15 to rotate via the second connecting rod 14. The walking wheel 15 further drives the drive shaft 16 to rotate via the connecting shaft 20. The drive shaft 16 then drives the directional wheel 4 to rotate, causing the directional wheel 4 to drive the electric trolley body 1 forward. Once the device starts moving, the user releases the pressure plate 10, and the walking wheel 15 continues to rotate. This pushes the slider 21 upward through the second connecting rod 14, and the spring 7 and the first connecting rod 13 push the moving block 6 back to its original position. This repeated motion, combined with inertia and the driving force of the walking wheel 15, causes the electric cart body 2 to move forward continuously, reducing the pushing force required by the user. This provides a walking assistance function from the moment the electric cart body 1 starts moving. When an emergency braking of the electric cart body 1 is needed, the pressure plate 10 is pressed, keeping it in contact with the pusher 2. At this time, the walking force 15 can no longer rotate, thus preventing the directional wheel 4 from rotating and achieving the braking function. When climbing continuously, the motor 17 can be started to drive the device, effectively extending the device's range.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] 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 electric medical cart with force sensing walking aid function, comprising an electric cart body (1), the bottom surface of the electric cart body (1) is provided with a drive shaft (16) driven by a motor (17) and two universal wheels (5), two directional wheels (4) are fixedly installed on the drive shaft (16), and a power supply (3) is arranged in the electric cart body (1), characterized in that: The electric trolley body (1) is equipped with a walking aid mechanism; The walking aid mechanism includes a pusher (2), a moving block (6), a first connecting rod (13), a second connecting rod (14), a slider (21), and a walking wheel (15). The moving block (6) is sleeved on the periphery of the pusher (2). A connecting plate (8) is fixedly connected between the two moving blocks (6). A push rod (9) is fixedly connected to one surface of the connecting plate (8). A pressure plate (10) is fixedly connected to one end of the push rod (9). A spring (7) is provided on the periphery of the pusher (2). The moving block (6) and the slider (21) are both hinged to the first connecting rod (13). The walking wheel (15) and the slider (21) are both hinged to the second connecting rod (14). A connecting shaft (20) is fixedly connected between the walking wheel (15) and the drive shaft (16). The pressure plate (10) can be pushed to drive the directional wheel (4) to rotate, providing additional driving force for the directional wheel (4).

2. The electric medical cart with force sensing and walking assistance function according to claim 1, characterized in that, The output end of the motor (17) is fixedly connected to the main gear (18), and the circumferential side of the drive shaft (16) is fixedly connected to the auxiliary gear (19). The main gear (18) and the auxiliary gear (19) mesh to drive the directional wheel (4) to rotate, thereby driving the electric trolley body (1) to move at a constant speed.

3. The electric medical cart with force sensing and walking assistance function according to claim 1, characterized in that, The electric trolley body (1) has guide rails (11) fixedly connected to both sides. The slider (21) is installed in the guide rail (11) and slides with the guide rail (11).

4. The electric medical cart with force sensing walker function according to claim 3, wherein, Limiting grooves (12) are provided on both sides of the guide rail (11). Limiting blocks (23) are slidably connected in the limiting grooves (12). The limiting blocks (23) are fixedly connected to the slider (21). The limiting blocks (23) limit the slider (21) in the guide rail (11) to prevent the slider (21) from falling out of the guide rail (11).

5. The electric medical cart with force sensing walker function according to claim 1, wherein, The movable block (6) slides with the pusher (2). The movable block (6) has several spherical grooves, and the spherical grooves are connected with rolling balls (22). The rolling balls (22) are used to achieve rolling friction and reduce the friction between the movable block (6) and the pusher (2).

6. The electric medical cart with force sensing walker function according to claim 1, wherein, The push rod (9) and the pusher (2) slide together.

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