A mute trolley with multi-stage lifting function

Abstract

This utility model discloses a silent trolley with multi-level lifting function, belonging to the field of mobile vehicle technology. Its key technical features include a base, a shelf at the center of the top of the base, multiple placement frames inside the shelf, an adjustment component on the outside of each placement frame, and a lifting component on the outside of the shelf. The adjustment component allows for quick positioning and fixing of the placement frames. When adjusting the height of the placement frames, pulling the handle moves the movable plate and the insert rod, disengaging the insert rod from the circular groove. The position of the placement frame can then be freely adjusted. Releasing the handle allows the insert rod to automatically insert into the corresponding circular groove under the elastic force of the tension spring, completing the fixing. This structure is convenient to operate, and the multi-level height adjustment achieved through the multiple circular groove design allows for flexible adjustment of the layer spacing according to the material size, thereby improving space utilization.

Description

Technical Field

[0001] This utility model relates to the field of mobile vehicle technology, and in particular to a silent trolley with multi-stage lifting function. Background Technology

[0002] In places with high environmental requirements, such as medical care, laboratory operations, and precision electronic processing, trolleys are commonly used for material transfer and temporary storage, and their performance directly affects work efficiency and environmental comfort.

[0003] Currently, most trolleys on the market are fixed-structure shelves whose height cannot be adjusted according to actual needs. This makes it difficult to accommodate the picking habits of operators of different heights. Furthermore, the shelf height cannot be flexibly adjusted according to the size and specifications of the materials. As a result, when moving items of different heights, either the space utilization is low or the items are too tall to fit the shelf, and they can only be stacked. This not only easily causes the materials to be crushed and damaged, but also increases the difficulty of picking up and placing materials, seriously affecting work efficiency.

[0004] Therefore, a silent trolley with multi-stage lifting function is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a silent trolley with multi-level lifting function, which can solve the problems of existing trolleys, which are mostly fixed structure shelves, whose height cannot be adjusted according to actual needs, making it difficult to adapt to the picking habits of operators of different heights. Furthermore, the shelf height cannot be flexibly adjusted according to the size and specifications of the materials, resulting in either low space utilization or the items being too tall to fit the shelf when moving items of different heights, forcing them to be stacked. This not only easily causes the materials to be crushed and damaged, but also increases the difficulty of picking up and placing materials, seriously affecting work efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a silent trolley with multi-level lifting function, including a base, a shelf at the center of the top of the base, multiple placement frames inside the shelf, an adjustment component on the outside of the placement frames, and a lifting component on the outside of the shelf. The adjustment component includes a connecting plate, which is fixedly connected to the outside of the placement frames. Insert rods penetrate both sides of the inside of the connecting plate. Multiple circular grooves are formed on the surface of the shelf, and the grooves cooperate with the insert rods. A movable plate is fixedly connected to the end of the insert rod away from the circular groove. A handle is fixedly connected to the surface of the movable plate. A fastening spring is sleeved on the surface of the insert rod, and both ends of the fastening spring are fixedly connected to the connecting plate and the movable plate, respectively.

[0007] Preferably, the lifting assembly includes two upright plates, which are respectively fixedly connected to the two sides of the top of the base. Each of the two upright plates has an installation groove on the side that is close to each other. A screw is rotatably connected to the inside of the installation groove through a bearing. An internal thread block is threadedly connected to the surface of the screw, and the internal thread block is fixedly connected to the placement frame.

[0008] Preferably, a micro motor is fixedly installed on the top of the upright plate, and the output shaft of the micro motor is fixedly connected to the top of the screw.

[0009] Preferably, a limiting groove is formed on the inner wall of the mounting groove, and a limiting block is fixedly connected to the surface of the internal threaded block and the limiting block is slidably connected inside the limiting groove.

[0010] Preferably, the bottom of the base is provided with silent rubber wheels, and the silent rubber wheels are evenly distributed at the four corners of the bottom of the base.

[0011] Preferably, a fixing frame is fixedly connected to both sides of the base, and an electric push rod is fixedly installed inside the fixing frame.

[0012] Preferably, the telescopic end of the electric push rod is fixedly connected to a support plate, and an anti-slip pad is adhered to the bottom of the support plate.

[0013] Preferably, a push handle is fixedly connected to the right side of the base, and the surface of the push handle is coated with an anti-slip coating.

[0014] Preferably, a controller is fixedly mounted on the surface of the push handle, and the micro motor and the electric push rod are both electrically connected to the controller.

[0015] Preferably, guide grooves are provided on both sides of the inner wall of the shelf, and guide blocks are fixedly connected to both sides of the placement frame and the guide blocks are slidably connected inside the guide grooves.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This application enables the rapid positioning and fixing of the placement frame by setting an adjustment component. When it is necessary to adjust the height of the placement frame, the movable plate and the insert rod are moved by pulling the handle, so that the insert rod is disengaged from the round groove. At this time, the position of the placement frame can be adjusted freely. After releasing the handle, under the elastic force of the fastening spring, the insert rod will automatically insert into the corresponding round groove to complete the fixing. This structure is easy to operate, and the multi-level height adjustment is achieved through the design of multiple round grooves. The layer spacing can be flexibly adjusted according to the material size, thereby improving the space utilization rate.

[0018] 2. This application uses a lifting assembly where a micro motor drives a screw to rotate. Through the threaded engagement between the screw and the internal threaded block, the placement frame moves up and down along the mounting groove. Combined with the guiding effect of the limit groove and the limit block, the stability and accuracy of the lifting process are ensured. Moreover, the electric adjustment method is more labor-saving than the traditional manual adjustment and facilitates precise height control, meeting the usage needs of operators of different heights and improving work comfort. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the silent trolley with multi-stage lifting function of this utility model;

[0020] Figure 2 This is a schematic diagram of the lifting assembly of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the adjustment component of this utility model;

[0022] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle;

[0023] Figure 5 This utility model Figure 3 A magnified view of point B in the diagram.

[0024] In the diagram, 1. Base; 2. Shelf; 3. Placement frame; 4. Adjustment component; 401. Connecting plate; 402. Insert rod; 403. Circular groove; 404. Movable plate; 405. Handle; 406. Fastening spring; 5. Lifting component; 501. Upright plate; 502. Mounting groove; 503. Screw; 504. Internal threaded block; 505. Micro motor; 6. Limiting groove; 7. Limiting block; 8. Silent rubber wheel; 9. Fixing frame; 10. Electric push rod; 11. Support plate; 12. Anti-slip mat; 13. Push handle; 14. Controller; 15. Guide groove; 16. Guide block. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-5 The present invention provides the following technical solution:

[0027] A silent trolley with multi-level lifting function includes a base 1, a shelf 2 at the center of the top of the base 1, multiple placement frames 3 inside the shelf 2, an adjustment component 4 on the outside of the placement frames 3, and a lifting component 5 on the outside of the shelf 2. The adjustment component 4 includes a connecting plate 401, which is fixedly connected to the outside of the placement frames 3. Insert rods 402 pass through both sides inside the connecting plate 401. Multiple circular grooves 403 are formed on the surface of the shelf 2 and are used in conjunction with the insert rods 402. A movable plate 404 is fixedly connected to the end of the insert rod 402 away from the circular groove 403. A handle 405 is fixedly connected to the surface of the movable plate 404. A fastening spring 406 is sleeved on the surface of the insert rod 402 and both ends of the fastening spring 406 are fixedly connected to the connecting plate 401 and the movable plate 404, respectively.

[0028] In this embodiment: by setting the adjustment component 4, the connecting plate 401 serves as the connecting carrier, with one end fixedly connected to the placement frame 3, and the other end providing installation support for components such as the insertion rod 402 and the fastening spring 406, thus achieving an integrated connection between the adjustment component 4 and the placement frame 3. The insertion rod 402, by inserting into the circular groove 403 on the surface of the shelf 2, can directly restrict the position of the placement frame 3, preventing it from shifting during use. When the height needs to be adjusted, the insertion rod 402 can be released from the circular groove 403 to release the fixation. The circular groove 403 can cooperate with the insertion rod 402 to form a positioning structure. Multiple circular grooves 403 are distributed along the height direction of the shelf 2, providing insertion points of different heights for the insertion rod 402, thereby achieving placement. The frame 3 features multi-level height adjustment. The movable plate 404 connects the two insertion rods 402 into a single unit. By synchronously driving the two insertion rods 402 to move, it ensures that the insertion rods 402 on both sides simultaneously disengage from or insert into the circular groove 403, thus ensuring the synchronicity and stability of the adjustment operation. The handle 405 provides a force point for the operator, making it easy to pull the movable plate 404 to move the insertion rods 402, making the adjustment operation more effortless and convenient. The fastening spring 406 uses its own elasticity to always apply a pulling force to the movable plate 404 in the direction of the connecting plate 401. When the handle 405 is released, it automatically drives the insertion rods 402 to insert into the circular groove 403, thereby achieving automatic locking of the frame 3 and preventing the insertion rods 402 from accidentally disengaging and causing the frame 3 to loosen.

[0029] Specifically, such as Figure 2 As shown, the lifting assembly 5 includes two upright plates 501, which are fixedly connected to the top of the base 1 on both sides. The two upright plates 501 are provided with mounting grooves 502 on the side that is close to each other. The inside of the mounting grooves 502 is rotatably connected to a screw 503 through a bearing. The surface of the screw 503 is threaded with an internal thread block 504, which is fixedly connected to the placement frame 3.

[0030] Specifically, such as Figure 2As shown, a micro motor 505 is fixedly installed on the top of the upright plate 501, and the output shaft of the micro motor 505 is fixedly connected to the top of the screw 503.

[0031] Specifically, such as Figure 2 As shown, a limiting groove 6 is provided on the inner wall of the mounting groove 502, and a limiting block 7 is fixedly connected to the surface of the internal thread block 504 and the limiting block 7 is slidably connected inside the limiting groove 6.

[0032] In this embodiment: by setting up the lifting assembly 5, the two side uprights 501 are fixed to the top of the base 1, which can provide a stable mounting carrier for the entire lifting assembly 5, ensuring the overall stability of the structure during the lifting process and preventing the lifting accuracy from being affected by deformation due to force. The mounting groove 502 can provide a closed mounting space and motion constraint for the screw 503. It can limit the lateral displacement of the screw 503, ensuring that the screw 503 rotates only on the fixed axis. At the same time, it provides a guide track for the up and down movement of the internal thread block 504, ensuring the linearity of the lifting action. The screw 503 is rotatably mounted in the mounting groove 502 through bearings, and the screw on its surface... The threaded groove 504 can cooperate with the internal threaded block 504 to convert the rotational motion of the micro motor 505 into the linear motion of the internal threaded block 504. When the screw 503 rotates, the internal threaded block 504 will move up and down along the axis of the screw 503, thereby driving the placement frame 3 fixed thereto to rise and fall synchronously, realizing the height adjustment function. The micro motor 505 can provide power for the lifting action, realizing the electric adjustment of the height of the placement frame 3. Compared with manual adjustment, it is more labor-saving and easier to control precisely. The limiting groove 6 can provide a sliding track for the limiting block 7, limiting the movement direction of the limiting block 7 to only vertical linear movement, thereby improving the lifting stability.

[0033] Specifically, such as Figure 1 As shown, the bottom of the base 1 is provided with silent rubber wheels 8, and the silent rubber wheels 8 are evenly distributed at the four corners of the bottom of the base 1.

[0034] Specifically, such as Figure 4 As shown, a fixed bracket 9 is fixedly connected to both sides of the base 1, and an electric push rod 10 is fixedly installed inside the fixed bracket 9.

[0035] Specifically, such as Figure 4 As shown, the telescopic end of the electric push rod 10 is fixedly connected to a support plate 11, and an anti-slip pad 12 is glued to the bottom of the support plate 11.

[0036] In this embodiment: With the above settings, the fixing frame 9 is fixedly connected to both sides of the base 1, mainly serving to install and fix the electric push rod 10. It can provide a stable support foundation for the electric push rod 10, ensuring that the electric push rod 10 will not shake or shift during operation, thus ensuring its normal operation. The electric push rod 10 is the power device for raising and lowering the support plate 11. Through its extension and retraction, it can drive the support plate 11 to move up and down, thereby realizing the switching between the moving state and the stable parking state of the trolley. The operation is convenient and efficient. When the electric push rod 10 extends, the support plate 11 will move downward and contact the ground, which increases the contact area between the trolley and the ground, and can distribute the weight of the trolley more evenly on the ground, improving the stability of the trolley when parked. The anti-slip pad 12 is adhered to the bottom of the support plate 11 and is made of a material with a high coefficient of friction. It can increase the friction between the support plate 11 and the ground, preventing the trolley from sliding when parked, further enhancing the stability and safety of the trolley.

[0037] Specifically, such as Figure 4 As shown, a push handle 13 is fixedly connected to the right side of the base 1, and the surface of the push handle 13 is coated with an anti-slip coating.

[0038] Specifically, such as Figure 4 As shown, a controller 14 is fixedly mounted on the surface of the push handle 13. The micro motor 505 and the electric push rod 10 are all electrically connected to the controller 14.

[0039] Specifically, such as Figure 5 As shown, guide grooves 15 are provided on both sides of the inner wall of the shelf 2, and guide blocks 16 are fixedly connected to both sides of the placement frame 3, and the guide blocks 16 are slidably connected inside the guide grooves 15.

[0040] In this embodiment: With the above configuration, the push handle 13 is the force-applying component for the operator to push the cart, providing a convenient grip position for the operator to easily control the cart's direction and speed. Its surface is coated with an anti-slip coating that increases friction between the hand and the push handle 13, effectively preventing slippage even when hands are sweaty or slightly dirty, thus improving operational stability and safety during pushing. The controller 14 is fixedly mounted on the surface of the push handle 13 and is the core control unit for the entire cart's electrical components. Through electrical connection with the micro motor 505 and the electric push rod 10, it can centrally control... The lifting assembly 5 and the control support plate 11 can be raised and lowered without operating different parts separately, simplifying the operation process. This allows operators to easily adjust the functions at any time while pushing the trolley, improving efficiency. The guide blocks 16 are located on both sides of the inner wall of the shelf 2 and provide a precise sliding track. This limits the movement trajectory of the guide blocks 16 to a straight line, thus guiding the lifting and lowering of the placement frame 3. This prevents the placement frame 3 from deviating, shaking, or getting stuck during the lifting and lowering process, thereby improving the stability and smoothness of the adjustment of the placement frame 3.

[0041] Working principle: First, adjust the initial layer spacing of multiple placement frames 3 according to the material height. Hold the handle 405 on the movable plate 404 and pull it outwards, causing the insertion rod 402 to disengage from the circular groove 403 of the shelf 2. At this time, the fastening spring 406 will be stretched. Then, move the placement frame 3 up and down along the guide groove 15 on the inner wall of the shelf 2. After the placement frame 3 is adjusted to the appropriate height, release the handle 405. Under the elastic force of the fastening spring 406, the insertion rod 402 will automatically insert into the corresponding circular groove 403, completing the positioning of the placement frame 3. Adjust the positions of multiple placement frames 3 in sequence, and then place the material layer by layer into the multiple placement frames 3 to avoid overloading on one side and causing the trolley's center of gravity to shift. Afterwards, the operator can hold the push handle 13 and push the trolley. The silent rubber wheels 8 at the bottom of the base 1 reduce noise during movement due to the cushioning and rolling friction characteristics of the rubber material. When the trolley needs to be stopped at the target position, the operator... The controller 14 on the surface of the push handle 13 causes the telescopic end of the electric push rod 10 to drive the support plate 11 to contact the ground. The anti-slip pad 12 at the bottom of the support plate 11 can increase the friction with the ground. After the support plate 11 is fully supported, the center of gravity of the trolley will be transferred to the support plate 11 through the fixing frame 9 and the electric push rod 10. This can prevent the silent rubber wheel 8 from rolling and causing the trolley to move accidentally, thus achieving stable parking. If it is necessary to adjust the overall height of the placement frame 3 (such as to accommodate operators of different heights to pick up materials), the micro motor 505 is started through the controller 14. The output shaft of the micro motor 505 will drive the screw 503 to rotate. The screw 503 drives the internal thread block 504 to move up and down through the threaded engagement. When the internal thread block 504 moves, it will synchronously drive the placement frame 3 to move up and down along the guide groove 15 until the target height is reached. Then, the micro motor 505 is turned off through the controller 14 to complete the height adjustment.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A silent trolley with multi-stage lifting function, comprising a base (1), characterized in that: A shelf (2) is provided at the center of the top of the base (1). A placement frame (3) is provided inside the shelf (2), and the number of placement frames (3) is multiple. An adjustment component (4) is provided on the outside of the placement frame (3), and a lifting component (5) is provided on the outside of the shelf (2). The adjustment component (4) includes a connecting plate (401), which is fixedly connected to the outside of the placement frame (3). Insert rods (402) penetrate both sides of the inside of the connecting plate (401). The shelf (2) has multiple circular grooves (403) on its surface, and the circular grooves (403) are used in conjunction with the insert rod (402). The end of the insert rod (402) away from the circular groove (403) is fixedly connected to a movable plate (404). The surface of the movable plate (404) is fixedly connected to a handle (405). The surface of the insert rod (402) is fitted with a fastening spring (406), and the two ends of the fastening spring (406) are fixedly connected to the connecting plate (401) and the movable plate (404) respectively.

2. A silent trolley with multi-stage lifting function according to claim 1, characterized in that: The lifting assembly (5) includes two upright plates (501) and the two upright plates (501) are fixedly connected to the top of the base (1) on both sides. The two upright plates (501) are provided with mounting grooves (502) on the side that is close to each other. The mounting grooves (502) are rotatably connected to the screws (503) through bearings. The surface of the screws (503) is threaded with an internal thread block (504). The internal thread block (504) is fixedly connected to the placement frame (3).

3. A silent trolley with multi-stage lifting function according to claim 2, characterized in that: A micro motor (505) is fixedly installed on the top of the upright plate (501), and the output shaft of the micro motor (505) is fixedly connected to the top of the screw (503).

4. A silent trolley with multi-stage lifting function according to claim 2, characterized in that: The inner wall of the mounting groove (502) is provided with a limiting groove (6), and the surface of the internal thread block (504) is fixedly connected to a limiting block (7), and the limiting block (7) is slidably connected inside the limiting groove (6).

5. A silent trolley with multi-stage lifting function according to claim 1, characterized in that: The bottom of the base (1) is provided with silent rubber wheels (8), and the silent rubber wheels (8) are evenly distributed at the four corners of the bottom of the base (1).

6. A silent trolley with multi-stage lifting function according to claim 3, characterized in that: Both sides of the base (1) are fixedly connected to a fixing frame (9), and an electric push rod (10) is fixedly installed inside the fixing frame (9).

7. A silent trolley with multi-stage lifting function according to claim 6, characterized in that: The telescopic end of the electric push rod (10) is fixedly connected to a support plate (11), and an anti-slip pad (12) is adhered to the bottom of the support plate (11).

8. A silent trolley with multi-stage lifting function according to claim 6, characterized in that: A push handle (13) is fixedly connected to the right side of the base (1), and the surface of the push handle (13) is coated with an anti-slip coating.

9. A silent trolley with multi-stage lifting function according to claim 8, characterized in that: The push handle (13) is fixedly mounted with a controller (14), and the micro motor (505) and the electric push rod (10) are electrically connected to the controller (14).

10. A silent trolley with multi-stage lifting function according to claim 1, characterized in that: The inner walls of the shelf (2) are provided with guide grooves (15) on both sides, and the placement frame (3) is fixedly connected with guide blocks (16) on both sides, and the guide blocks (16) are slidably connected inside the guide grooves (15).

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