Logistics trolley with lifting mechanism

Abstract

The logistics trolley with the lifting mechanism comprises a shell, the lifting mechanism and a moving mechanism, the lifting mechanism comprises a first driving motor, a gear transmission assembly and a lifting plate, and the gear transmission assembly is connected with the first driving motor and can drive the lifting plate to reciprocate in the longitudinal direction through lead screw transmission. The driving gear is driven by the driving element to rotate, power is synchronously transmitted to the three lead screw nut pairs, the lifting actions of the three lead screw nut pairs are kept consistent, the stability of the logistics trolley during goods shelf lifting operation is greatly improved, the risk that goods overturn occurs, and unnecessary economic losses are avoided. Meanwhile, a gear meshing transmission mode is adopted in the lifting mechanism, power of a driving gear is transmitted to three driven gears, so that a lead screw nut pair is driven to rotate to achieve the purpose of lifting operation, and the problems that a transmission lifting hydraulic system is prone to oil leakage and high in maintenance cost are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of logistics and warehousing automation equipment, and in particular to a logistics trolley with a lifting mechanism. Background Technology

[0002] As my country's automated logistics market matures, more and more companies are realizing the importance of artificial intelligence replacing manual labor. Traditional manual handling of goods is not only inefficient but also consumes a large amount of labor, increasing operating costs for logistics companies and causing significant problems for logistics and warehousing enterprises. AGVs (Automated Guided Vehicles) are key equipment in modern warehousing systems such as flexible production lines and automated warehouses. They are characterized by their attractive appearance, smooth lifting, durability, and flexible operation, and are therefore widely used in automated production and warehousing systems in industries such as automobile manufacturing and home appliances.

[0003] The lifting function of material handling equipment is a core requirement for achieving efficient stacking and cross-level transfer of goods. Currently, traditional lifting logistics trolleys mostly use hydraulic or simple mechanical structures to achieve height adjustment. For example, the hydraulic lifting trolley disclosed in patent CN202122193868.6, while achieving basic lifting functions, lacks stable support on both sides, leading to easy swaying during lifting and posing a risk of goods tipping over. Furthermore, the hydraulic system suffers from oil leaks, high maintenance costs, and low automation, requiring manual operation. In addition, some designs (such as patent CN201621296385.1) improve efficiency through worm gear transmission, but fail to address the problem of a weak guide structure, causing the lifting plate to easily deviate during movement, affecting accuracy. Therefore, further improvements are needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a high-precision, compact logistics cart with a lifting mechanism to reduce the reliance on manual handling and meet the urgent needs of flexible and automated handling in modern logistics scenarios.

[0005] This utility model is achieved through the following technical solution:

[0006] A logistics trolley with a lifting mechanism includes a housing, a lifting mechanism disposed inside the housing, and a moving mechanism located at the bottom of the housing. The lifting mechanism includes a first drive motor, a gear transmission assembly, and a lifting plate. The gear transmission assembly is connected to the first drive motor and is capable of driving the lifting plate to reciprocate longitudinally.

[0007] According to the above technical solution, preferably, the lifting plate achieves reciprocating linear motion through a lead screw drive. The gear transmission assembly includes a drive gear connected to a first drive motor, a rotary support bearing gear meshing with the drive gear, and multiple driven gears arranged circumferentially on the rotary support bearing gear. The drive gear, rotary support bearing gear, and driven gears are rotatably connected to the surface of the lifting plate, and the driven gears can drive the lifting plate to reciprocate longitudinally via the lead screw drive.

[0008] According to the above technical solution, preferably, the lifting mechanism further includes a lower fixing plate fixedly installed inside the housing. Multiple transmission screws are threadedly connected to the lower fixing plate, and each transmission screw is correspondingly arranged and connected to a driven gear. The lower fixing plate has mounting holes corresponding to the positions of each driven gear, and a screw nut threadedly connected to the transmission screw is fixedly connected to each mounting hole.

[0009] According to the above technical solution, preferably, the slewing support bearing gear has three driven gears evenly distributed in the circumference, and the driven gears mesh with the slewing support bearing gear.

[0010] According to the above technical solution, preferably, the lifting plate is fixedly provided with multiple threaded sleeves for connecting upward to the top plate to complete the action of lifting the goods.

[0011] According to the above technical solution, preferably, the moving mechanism includes a driving wheel and a driven wheel, and two driving wheels are provided, each connected to two sets of second drive motors.

[0012] The beneficial effects of this utility model are:

[0013] The drive gear of this invention rotates under the drive of the drive element, and transmits power synchronously to three lead screw and nut pairs. The lifting and lowering movements of the three lead screw and nut pairs are consistent, which greatly improves the stability of the logistics cart during the lifting and lowering operation of the shelf, avoids the risk of goods tipping over, and avoids unnecessary economic losses.

[0014] Meanwhile, in this application, the lifting mechanism is driven by a single motor, employing a gear-meshing transmission method to transmit power from the drive gear to three driven gears, thereby rotating the lead screw and nut pair to achieve the lifting operation. This effectively solves the problems of easy oil leakage and high maintenance costs in hydraulic transmission lifting systems. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 .

[0016] Figure 2 This is a three-dimensional structural diagram of the lifting mechanism of this utility model. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 .

[0018] Figure 4 This is a three-dimensional structural diagram of the lifting mechanism of this utility model. Figure 2 .

[0019] Figure 5 This is a three-dimensional structural diagram of the moving mechanism of this utility model. Figure 1 .

[0020] Figure 6 This is a three-dimensional structural diagram of the moving mechanism of this utility model. Figure 2 .

[0021] In the diagram: 1. Lifting mechanism; 1-1. Reducer A; 1-2. Motor A; 1-3. Drive gear; 1-4. Slewing support bearing gear; 1-5. Threaded sleeve; 1-6. Lower fixed plate; 1-7. Lead screw nut; 1-8. Transmission lead screw; 1-9. Lifting plate; 1-10. Driven gear;

[0022] 2. Moving mechanism; 2-1. Coupling; 2-2. Motor B; 2-3. Reducer B; 2-4. Driving wheel; 2-5. Driven wheel. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0025] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] Example 1: As shown in the figure, this utility model includes a housing, a lifting mechanism 1 disposed inside the housing, and a moving mechanism 2 located at the bottom of the housing. The lifting mechanism 1 includes a first drive motor, a gear transmission assembly, and lifting plates 1-9. In this example, the first drive motor includes a motor A1-2 with a reducer A1-1. The gear transmission assembly is connected to the first drive motor and can drive the lifting plates 1-9 to reciprocate longitudinally. In this example, the moving mechanism 2 can use common wheels and drive structures to provide power to the logistics cart, enabling the cart to move to a designated position. Those skilled in the art can understand the working principle of the moving mechanism 2 of this application by referring to common wheel drives, so the specific structure will not be described in detail in this embodiment.

[0027] The lifting plate 1-9 achieves reciprocating linear motion via a lead screw drive. In this example, the gear transmission assembly includes a drive gear 1-3 connected to the first drive motor, a rotary support bearing gear 1-4 meshing with the drive gear 1-3, and multiple driven gears 1-10 arranged circumferentially around the rotary support bearing gear 1-4. Preferably, but not limited to, three driven gears 1-10 are evenly distributed circumferentially around the rotary support bearing gear 1-4, and these driven gears 1-10 mesh with the rotary support bearing gear 1-4. The drive gear 1-3, rotary support bearing gear 1-4, and driven gears 1-10 are rotatably connected to the surface of the lifting plate 1-9, and the driven gears 1-10 can drive the lifting plate 1-9 to reciprocate longitudinally via a lead screw drive.

[0028] In addition, the lifting mechanism 1 also includes a lower fixed plate 1-6 fixedly installed inside the housing. Multiple transmission screws 1-8 are threadedly connected to the lower fixed plate 1-6. Each transmission screw 1-8 is correspondingly arranged and connected to a driven gear 1-10. The transmission screws 1-8 pass through the lifting plate 1-9 and are threadedly connected downwards to the lower fixed plate 1-6. In this example, the lower fixed plate 1-6 has mounting holes corresponding to the positions of each driven gear 1-10. A screw nut 1-7, threadedly connected to the transmission screw 1-8, is fixedly connected to each mounting hole. The transmission screw 1-8 and screw nut 1-7 are threadedly engaged, enabling the lifting plate 1-9 to reciprocate longitudinally. In this example, preferably but not limited to, three driven gears 1-10 are evenly distributed circumferentially around the slewing support bearing gear 1-4. When the first drive motor starts, it drives the motor output shaft to rotate. The motor output shaft is equipped with a drive gear 1-3, which meshes with the slewing support bearing gear 1-4. With the slewing support bearing gear 1-4 as the main body, the power of the drive gear 1-3 is transmitted to the three driven gears 1-10. The driven gears 1-10 drive the lifting plate 1-9 to move longitudinally reciprocally through the lead screw drive, thereby realizing the lifting function of the lifting mechanism 1. At the same time, the three transmission lead screws 1-8 move synchronously, which can greatly improve the stability of the lifting mechanism 1's lifting action.

[0029] Meanwhile, multiple threaded sleeves 1-5 are fixedly installed on the lifting plate 1-9 for connecting upward to the top plate to complete the lifting action of the goods. Specifically, in this example, the upper surface of the outer shell is open, and the threaded sleeves 1-5 on the lifting plate 1-9 are used to connect to the top plate. The lifting and lowering of the top plate completes the lifting and lowering process of the goods.

[0030] Example 2: Based on Example 1 above, preferably, this application discloses a preferred embodiment of the moving mechanism 2. The moving mechanism 2 includes a driving wheel 2-4 and driven wheels 2-5. Two driving wheels 2-4 are provided, each connected to one of two sets of second drive motors. In this example, the second drive motor includes a motor B2-2 with a reducer B2-3. Specifically, the moving mechanism 2 adopts a six-wheel wheel system distribution, with one driving wheel 2-4 arranged at the front and rear, and two driven wheels 2-5 arranged on the left and right sides. Both the driven wheels 2-5 and the driving wheels 2-4 are mounted on the bottom of the vehicle body. Each driving wheel 2-4 is driven by a second drive motor, and a coupling 2-1 connects the motor shaft of the second drive motor and the wheel axle of the driving wheel 2-4. When the second drive motor starts, it transmits the power output by the motor to the driving wheel 2-4. To enable the vehicle to move in any direction, this application controls the rotational speed of the two drive wheels 2-4. When the rotational speeds of the two drive wheels 2-4 are the same, the logistics vehicle moves in a straight line; when the rotational speeds of the two drive wheels 2-4 are different, the logistics vehicle can turn. This example uses a six-wheeled wheel system, which features high load capacity, stationary rotation, and a small operating radius, enabling omnidirectional movement of the logistics vehicle.

[0031] Furthermore, this application prefers, but is not limited to, the following working methods:

[0032] When goods are loaded onto the top plate of the logistics trolley, the drive motor in the moving mechanism is activated, causing the trolley to move to the designated position. Upon reaching the designated position, the motor in the lifting mechanism is activated, lifting the fully loaded shelf via the top plate. The lifting process utilizes a gear-meshing transmission method, with an external gear swivel bearing as the main component, transmitting power from the drive gear to three driven gears. These three driven gears respectively drive the transmission screw to rotate. During rotation, the screw engages with the screw nut, causing the lifting plate to reciprocate longitudinally, thus allowing the logistics trolley to lift the fully loaded shelf.

[0033] After the shelves are installed, the drive motor in the moving mechanism activates, moving the trolley to the designated position. Once it reaches the designated position, the motor in the lifting mechanism rotates in the opposite direction, causing the drive gear and the slewing support bearing to mesh in the opposite direction, and the transmission screw to rotate in the opposite direction, allowing the logistics trolley to lower the shelves filled with goods.

[0034] The drive gear of this invention rotates under the drive of the drive element, synchronously transmitting power to three lead screw and nut assemblies. The lifting and lowering movements of the three lead screw and nut assemblies are consistent, significantly improving the stability of the logistics cart during shelf lifting operations and avoiding the risk of goods tipping over, thus preventing unnecessary economic losses. Furthermore, the lifting mechanism in this application uses a drive motor to rotate, employing a gear meshing transmission method to transmit the power of the drive gear to three driven gears, thereby driving the lead screw and nut assemblies to rotate and achieve the lifting operation. This effectively solves the problems of easy oil leakage and high maintenance costs in hydraulic transmission lifting systems.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A logistics cart having a lifting mechanism, characterized by, The lifting mechanism (1) is arranged in the shell, and the moving mechanism (2) is arranged at the bottom of the shell, The lifting mechanism (1) comprises a first driving motor, a gear transmission assembly and a lifting plate (1-9), the gear transmission assembly is connected with the first driving motor and can drive the lifting plate (1-9) to move reciprocatingly along the longitudinal direction.

2. The logistics dolly with lifting mechanism according to claim 1, characterized in that, The lifting plate (1-9) realizes reciprocating linear motion through screw transmission.

3. The logistics cart with lifting mechanism according to claim 2, characterized in that, The gear transmission assembly comprises a driving gear (1-3) connected with the first driving motor, a rotary support bearing gear (1-4) engaged with the driving gear (1-3), a plurality of driven gears (1-10) arranged in the circumferential direction of the rotary support bearing gear (1-4), The driving gear (1-3), the rotary support bearing gear (1-4) and the driven gear (1-10) are rotationally connected to the surface of the lifting plate (1-9), and the driven gear (1-10) can drive the lifting plate (1-9) to move reciprocatingly along the longitudinal direction through screw transmission.

4. The logistics cart with lifting mechanism according to claim 3, characterized in that, The lifting mechanism (1) further comprises a lower fixed plate (1-6) fixedly installed in the shell, The lower fixed plate (1-6) is threadedly connected with a plurality of transmission screws (1-8), and each transmission screw (1-8) is correspondingly arranged and connected with each driven gear (1-10).

5. The logistics cart with lifting mechanism according to claim 4, wherein, The lower fixed plate (1-6) is provided with a mounting hole corresponding to the position of each driven gear (1-10), and a screw nut (1-7) threadedly connected with the transmission screw (1-8) is fixedly connected at each mounting hole.

6. The logistics cart with lifting mechanism according to claim 3, characterized in that, The rotary support bearing gear (1-4) is uniformly provided with three driven gears (1-10) in the circumferential direction, and the driven gears (1-10) are engaged with the rotary support bearing gear (1-4).

7. The logistics cart with lifting mechanism according to any one of claims 1-6, characterized in that, A plurality of threaded sleeves (1-5) are fixedly arranged on the lifting plate (1-9) and are used for upwardly connecting a top plate to complete the action of lifting goods.

8. The logistic cart with lifting mechanism according to claim 1, wherein, The moving mechanism (2) comprises a driving wheel (2-4) and a driven wheel (2-5), the driving wheel (2-4) is provided with two groups of second driving motors.

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