Double-decker cart

Abstract

This utility model discloses a double-decker trolley, belonging to the field of safety technology. It includes a base plate and a base fixedly connected to the bottom of the base plate. Side plates are fixedly connected to both sides of the top of the base plate. Horizontal plates are threaded to both ends of a first double-threaded rod. A bracket is fixedly connected to the top of the horizontal plates. Load-bearing blocks are fixedly connected to the outer walls of both sides of the base plate. A rotating shaft is rotatably connected to the load-bearing blocks. A sleeve is fixedly connected to the rotating shaft. A sliding rod is penetrating through the top of the sleeve. A limit block and a return spring are fixedly connected to the bottom of the sliding rod. This double-decker trolley, through the bracket driving the support plate to adjust its height, can directly deliver goods to shelves or platforms of different heights, improving operational efficiency. The sleeve, sliding rod, and return spring on the load-bearing blocks form a linkage structure. When the support plate is raised or lowered, the sliding rod slides within the sleeve, and the return spring stabilizes and supports the support plate through elasticity, offsetting the risk of tilting caused by the upward shift of the goods' center of gravity.

Description

Technical Field

[0001] This utility model relates to the field of handling trolley technology, specifically a double-decker trolley. Background Technology

[0002] The double-decker vehicle breaks through the limitations of traditional single-decker transport, achieving efficient space utilization. The upper and lower compartments operate independently yet collaboratively. Its structural design uses high-strength, lightweight materials to ensure load-bearing capacity while reducing vehicle weight. Combined with a precise suspension system and stabilization devices, it can maintain stable driving even when fully loaded. In terms of intelligent technology, the double-decker vehicle is equipped with an advanced onboard control system that can monitor parameters such as load, temperature, and humidity on each level in real time. It can also automatically adjust the driving mode according to road conditions and is widely used in logistics, passenger transport, and other fields.

[0003] For example, patent CN208716158U discloses a double-decker trolley, including a frame. A first drive mechanism capable of moving along a slide rail is provided on the lower end surface of the frame. A first roller conveyor mechanism is provided in the middle of the frame. A second roller conveyor mechanism is provided at the top of the frame. An electrical control cabinet and a battery are also provided on the frame. Electronic devices connected to the battery are provided at both the front and rear ends of the frame. Wireless chargers for wirelessly charging the electronic devices are provided at the vehicle body parking ends where the slide rails are located. The drive motor A of the first drive mechanism and the drive motor B of the second roller conveyor mechanism are both high-power drive motors. However, existing equipment can only transport goods horizontally. When goods need to be placed on shelves or loading / unloading platforms of different heights, it is often impossible to do so directly. It requires additional manual handling or other auxiliary equipment, which is cumbersome and inefficient. Furthermore, when loading taller goods, the center of gravity of the goods is concentrated on the upper load-bearing plate, causing the center of gravity of the entire vehicle to shift significantly upward. The vehicle is prone to tilting, which may not only cause the goods to fall and be damaged, but frequent tilting can also cause structural damage to the vehicle's components, affecting the vehicle's service life and safety.

[0004] Therefore, in order to solve this problem, we proposed a double-decker trolley. Utility Model Content

[0005] The purpose of this utility model is to provide a double-decker trolley to solve the problem that the existing devices mentioned in the background art can only achieve horizontal transportation of goods. When it is necessary to place goods on shelves or loading and unloading platforms of different heights, it is often impossible to do so directly. It is necessary to use additional manual handling or other auxiliary equipment, which is cumbersome and inefficient. Furthermore, when loading tall goods, the center of gravity of the goods is concentrated on the upper load-bearing plate, causing the center of gravity of the entire vehicle body to shift significantly upward. The vehicle body is prone to tilting, which may not only cause the goods to fall and be damaged, but also cause structural damage to the components of the vehicle body due to frequent tilting, affecting the service life and safety of the vehicle body.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-layer trolley, including a base plate and a base fixedly connected to the bottom of the base plate. Side plates are fixedly connected to both sides of the top of the base plate. A first double-threaded rod is rotatably connected to the side plates. A first motor is fixedly connected to the right end of the first double-threaded rod. Horizontal plates are threaded to both ends of the first double-threaded rod. A bracket is fixedly connected to the top of the horizontal plate. A support plate is fixedly connected to the top of the bracket. Load-bearing blocks are fixedly connected to the outer walls of both sides of the base plate. A rotating shaft is rotatably connected to the load-bearing blocks. A sleeve is fixedly connected to the rotating shaft. A sliding rod is penetrating through the top of the sleeve. A limit block is fixedly connected to the bottom of the sliding rod. A return spring is fixedly connected to the bottom of the sliding rod. The bottom of the return spring is fixedly connected to the bottom of the inner wall of the sleeve.

[0007] Furthermore, the side plates are symmetrically and fixedly connected with limit rods, and the horizontal plate is movably sleeved on the limit rods.

[0008] Furthermore, the top of the support plate has sliding grooves on both sides, a second motor is fixedly connected to one side of the support plate, a second double threaded rod is fixedly connected to the output end of the second motor, sliders are threaded to both ends of the second double threaded rod, a top plate is fixedly connected to the top of the slider, protective springs are evenly fixedly connected to the inner wall of the top plate, a limit plate is fixedly connected to the outer wall of the protective spring on the side away from the top plate, and movable rollers are evenly rotatably connected to the inner wall of the top plate.

[0009] Furthermore, a conveyor belt is fixedly connected to the middle of the top surface of the support plate, and a vehicle body is provided on the top of the conveyor belt.

[0010] Furthermore, an installation groove is provided on the outer wall of the right side of the support plate, an installation block is engaged in the installation groove, and an inclined block is fixedly connected to the outer wall of the installation block.

[0011] Furthermore, a first connecting member is fixedly connected to the top of the slide rod, and a second connecting member is movably connected to the first connecting member. The outer end of the first connecting member is fixedly connected to the outer wall of the support plate.

[0012] Furthermore, each of the four feet at the bottom of the base is fixedly connected to an electric omnidirectional wheel, which is electrically connected to an external control terminal.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The double-layer vehicle body adopts a novel structural design, the specific details of which are as follows:

[0014] (1) The double-layer vehicle body is driven by the first motor to rotate the first double threaded rod. The horizontal plate moves horizontally under the guidance of the limit rod, and then the support plate is adjusted in height by the bracket. Goods can be directly transported to shelves or loading and unloading platforms of different heights without relying on additional manual handling or auxiliary equipment, which significantly improves the operating efficiency. The sleeve, slide rod and return spring set on the load-bearing block form a linkage structure. During the lifting and lowering of the support plate, the slide rod can slide freely in the sleeve. At the same time, the return spring provides stable support to the support plate through elasticity. This structure can effectively offset the risk of tilting caused by the upward shift of the center of gravity of the goods, which not only protects the safety of the goods, but also extends the service life of the vehicle body.

[0015] (2) The double-layer vehicle body starts the second motor to drive the second double threaded rod to rotate according to the width of the goods. Under the action of threaded transmission, the slider drives the top plate to move along the support plate slide groove to the middle or both sides, so that the limiting plate accurately fits the two sides of the goods. At this time, the protective spring provides buffer force through elastic deformation, effectively reducing the rigid collision between the goods and the limiting structure during transportation, and improving the safety and stability of the goods. When the goods need to be transported, the conveyor belt transmission mechanism is turned on, and the goods move forward under the action of the conveyor belt traction force. At the same time, the movable roller inside the top plate assists the goods to slide through rolling friction, reducing the movement resistance. When the goods move to the edge of the support plate, the detachable inclined block guides the goods to slide down smoothly through the inclined guide surface, completing the automated loading and unloading process, significantly improving the convenience and efficiency of logistics operations.

[0016] Furthermore, the electric casters at the bottom of the base can be precisely controlled for steering and movement via an external control terminal, enabling flexible adaptation to various complex work scenarios such as warehousing and loading / unloading. The conveyor belt device integrated in the middle of the support plate can automatically complete the horizontal transport of goods. It works in conjunction with the height adjustment function of the support plate. By adjusting the height of the upper bearing surface and combining it with the automated transmission of the conveyor belt, multi-level cargo transportation paths can be constructed, realizing fully automated operation, significantly improving logistics turnover efficiency, and reducing manual intervention costs. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a three-dimensional schematic diagram of the height adjustment component of this utility model;

[0020] Figure 4 This is a three-dimensional schematic diagram of the protective component of this utility model;

[0021] Figure 5 This is an exploded view of the limiting component of this utility model;

[0022] Figure 6 This is a three-dimensional schematic diagram of the conveying component of this utility model.

[0023] In the diagram: 1. Base plate; 11. Side plate; 12. Horizontal plate; 13. Bracket; 14. Load-bearing block; 15. Sleeve; 151. Slide rod; 152. Limiting block; 2. Support plate; 21. Top plate; 22. Limiting plate; 23. Movable roller; 24. Inclined block; 3. Conveyor belt; 31. Car body; 4. Base. Detailed Implementation

[0024] 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.

[0025] This utility model provides the following technical solution: a double-decker trolley.

[0026] Example 1: A double-decker trolley, using components such as a bracket 13, a sleeve 15, and a sliding rod 151, where the bracket 13 adjusts the height of the trolley body 31, and the sleeve 15 and sliding rod 151 protect the trolley body 31 during its ascent, preventing the center of gravity of the entire device from shifting upwards when the cargo is at a high height, thus preventing the device from tilting and causing damage. Figure 1 - Figure 4As shown, the double-layer trolley includes a base plate 1 and a base 4 fixedly connected to the bottom of the base plate 1. Side plates 11 are fixedly connected to both sides of the top of the base plate 1. A first double-threaded rod is rotatably connected to the side plate 11. A first motor is fixedly connected to the right end of the first double-threaded rod. Horizontal plates 12 are threadedly connected to both ends of the first double-threaded rod. A bracket 13 is fixedly connected to the top of the horizontal plate 12. A support plate 2 is fixedly connected to the top of the bracket 13. Load-bearing blocks 14 are fixedly connected to the outer walls of both sides of the base plate 1 on the top of the base 4. A rotating shaft is rotatably connected to the load-bearing blocks 14. A sleeve 15 is fixedly connected to the rotating shaft. A slide rod 151 is connected through the top of the sleeve 15. A limit block 152 is fixedly connected to the bottom of the slide rod 151. A return spring is fixedly connected to the bottom of the slide rod 151. The bottom of the return spring is fixedly connected to the bottom of the inner wall of the sleeve 15. Limit rods are symmetrically fixedly connected between the side plates 11. The horizontal plate 12 is movably sleeved on the limit rods. A first connecting piece is fixedly connected to the top of the slide rod 151. A second connecting piece is movably connected to the first connecting piece. The outer end of the first connecting piece is fixedly connected to the outer wall of the support plate 2.

[0027] After the first motor starts, it drives the first double-threaded rod on the side plate 11 to rotate. Because the threads at both ends of the threaded rod turn in opposite directions, the horizontal plate 12 sleeved at both ends moves horizontally to the sides or the middle under the guidance of the limiting rod. The limiting rod restricts the rotation of the horizontal plate 12 and only allows it to move horizontally. The bracket 13 at the top of the horizontal plate 12 is fixedly connected to the support plate 2. Therefore, when the horizontal plate 12 moves, it will drive the support plate 2 to rise or fall through the bracket 13, so as to achieve precise adjustment of the height of the upper bearing surface. When the support plate 2 rises or falls, the top of the slide rod 151 is fixed to the outer wall of the support plate 2 through the first connector and moves synchronously with the support plate 2. The limiting block 152 at its bottom slides in the sleeve 15. The return spring is compressed or stretched to generate elastic force, which buffers the vibration of the support plate 2 and counteracts the tilting torque to ensure structural stability.

[0028] Example 2: Unlike Example 1, protective springs, limiting plates 22, and movable rollers 23 are used to protect and limit the sides of the vehicle body 31, preventing it from tipping over during transfer due to inaccurate positioning of the vehicle body 31, thus avoiding damage to the materials. Figures 5-6As shown, sliding grooves are provided on both sides of the top of the support plate 2. A second motor is fixedly connected to one side of the support plate 2. A second double-threaded rod is fixedly connected to the output end of the second motor. A slider is threaded to both ends of the second double-threaded rod. A top plate 21 is fixedly connected to the top of the slider. Protective springs are evenly fixedly connected to the inner wall of the top plate 21. A limit plate 22 is fixedly connected to the outer wall of the protective spring on the side away from the top plate 21. Movable rollers 23 are evenly rotatably connected inside the top plate 21. A conveyor belt 3 is fixedly connected to the middle of the top surface of the support plate 2. A vehicle body 31 is provided on the top of the conveyor belt 3. An installation groove is provided on the outer wall of the right side of the support plate 2. An installation block is engaged in the installation groove. An inclined block 24 is fixedly connected to the outer wall of the installation block. Electric universal wheels are fixedly connected to the four feet at the bottom of the base 4. The electric universal wheels are electrically connected to the external control terminal.

[0029] According to the width of the goods, the second motor drives the second double threaded rod on one side of the support plate 2 to rotate, which drives the slider in the top groove of the support plate 2 and the top plate 21 to move synchronously to the middle or both sides, so that the limiting plate 22 fits against the side of the goods. The limiting plate 22 is elastically connected to the top plate 21 through the protective spring. When the goods are displaced due to vibration, the protective spring absorbs the impact force through elastic deformation, effectively avoiding rigid collisions, such as shock protection in the transportation of glass products. When the goods move on the support plate 2, the movable roller 23 on the inner wall of the top plate 21 rolls with the bottom of the goods, converting sliding friction into rolling friction, significantly reducing the moving resistance, and facilitating manual or mechanical pushing and positioning. The conveyor belt 3 in the middle of the support plate 2 is opened, and its transmission mechanism drives the goods and the vehicle body 31 to be continuously transported in the specified direction. It is suitable for the automated transportation of batch goods. When the goods move to the right edge of the support plate 2, the inclined block 24 installed in the mounting groove on the right side of the support plate 2 guides the goods to slide down smoothly through the inclined guide surface to complete the unloading. The detachable design of the inclined block 24 supports the quick replacement of the inclined block 24 component with the appropriate slope according to the needs of different loading and unloading scenarios.

[0030] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-layer trolley, comprising a base plate (1) and a base (4) fixedly connected to the bottom of the base plate (1), characterized in that: Side plates (11) are fixedly connected to both sides of the top of the base plate (1). A first double threaded rod is rotatably connected to the side plate (11). A first motor is fixedly connected to the right end of the first double threaded rod. A horizontal plate (12) is threadedly connected to both ends of the first double threaded rod. A bracket (13) is fixedly connected to the top of the horizontal plate (12). A support plate (2) is fixedly connected to the top of the bracket (13). A load-bearing block (14) is fixedly connected to both sides of the outer wall of the top base plate (1) of the base (4). A rotating shaft is rotatably connected to the load-bearing block (14). A sleeve (15) is fixedly connected to the rotating shaft. A sliding rod (151) is connected through the top of the sleeve (15). A limit block (152) is fixedly connected to the bottom of the sliding rod (151). A return spring is fixedly connected to the bottom of the sliding rod (151). The bottom of the return spring is fixedly connected to the bottom of the inner wall of the sleeve (15).

2. The dual level cart of claim 1, wherein: Limiting rods are symmetrically fixedly connected between the side plates (11), and the horizontal plate (12) is movably sleeved on the limiting rods.

3. The dual level cart of claim 2, wherein: The top of the support plate (2) has sliding grooves on both sides. A second motor is fixedly connected to one side of the support plate (2). A second double threaded rod is fixedly connected to the output end of the second motor. A slider is threaded to both ends of the second double threaded rod. A top plate (21) is fixedly connected to the top of the slider. Protective springs are evenly fixedly connected to the inner wall of the top plate (21). A limit plate (22) is fixedly connected to the outer wall of the protective spring on the side away from the top plate (21). Movable rollers (23) are evenly rotatably connected to the inner wall of the top plate (21).

4. The dual level cart of claim 2, wherein: A conveyor belt (3) is fixedly connected to the middle of the top surface of the support plate (2), and a vehicle body (31) is provided on the top of the conveyor belt (3).

5. The dual level cart of claim 2, wherein: An installation groove is provided on the outer wall of the right side of the support plate (2), and an installation block is engaged in the installation groove. An inclined block (24) is fixedly connected to the outer wall of the installation block.

6. The dual level cart of claim 1, wherein: The top of the slide bar (151) is fixedly connected to a first connector, and a second connector is movably connected to the first connector. The outer end of the first connector is fixedly connected to the outer wall of the support plate (2).

7. The dual level cart of claim 1, wherein: The base (4) is fixedly connected to four feet at the bottom with electric casters, which are electrically connected to an external control terminal.

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