A three-tier plastic trolley that is easy to store

Abstract

This utility model discloses a three-layer plastic trolley that is easy to store, relating to the field of trolley storage technology. The utility model includes three upper frames and three lower frames, with the upper frames and corresponding lower frames detachably connected. The lower surface of the upper frame is in movable contact with the upper surface of the corresponding lower frame. The three upper and lower frames are distributed at the same vertical spacing. Several grooves are formed on the upper surface of the upper frame, and slots are symmetrically formed on the inner side of the upper frame. The lower frames are inserted into the corresponding slots. A through-type movable groove is symmetrically formed on the upper surface of the upper frame. This utility model provides a three-layer plastic trolley that is easy to store. The upper and lower frames are detachable, and the three-layer structure is assembled using support rods, positioning blocks, and bolts. After disassembly, it can be stored separately, significantly reducing space occupation. Furthermore, through a multi-structure longitudinal anti-detachment and lateral anti-slip design, combined with bolt fixing, it prevents loosening in multiple dimensions, improving stability.

Description

Technical Field

[0001] This utility model relates to the field of storage cart technology, specifically a three-layer plastic cart that is easy to store. Background Technology

[0002] Storage carts are wheeled, easy-to-move storage tools that help people organize and store various items. They are widely used in homes, offices, and other places. Multi-layer storage carts are the most common type, usually with multiple compartments or drawers, which can store books, remote controls, toys, and other miscellaneous items, and have strong storage capacity.

[0003] However, existing technologies still have the following problems:

[0004] Existing plastic three-layer trolleys are mostly fixed as a whole, with the upper and lower frames and the three-layer frame not being detachable. When not in use, they occupy the storage space of the entire trolley volume, and cannot be compressed by sorting and organizing. They have low applicability in small storage scenarios and are prone to space waste.

[0005] Furthermore, most plastic three-layer trolleys lack structural stability and are prone to loosening and wobbling: Existing technologies often only use simple connectors (such as single buckles or welding) to achieve frame connection, lacking multi-dimensional limiting designs for longitudinal anti-detachment and lateral anti-slip. During use, the trolley is prone to loosening due to relative displacement of components, especially when carrying items, the wobbling problem is more obvious, affecting the safety and stability of use.

[0006] To address the aforementioned problems, the inventors proposed a three-layer plastic trolley that is easy to store. Utility Model Content

[0007] To address the issues of poor storage convenience, high space occupancy, and insufficient structural stability of plastic three-layer trolleys, which are prone to loosening and wobbling, the purpose of this utility model is to provide a plastic three-layer trolley that is easy to store.

[0008] To solve the above technical problems, the present invention adopts the following technical solution: a plastic three-layer trolley that is easy to store, including three upper frames and three lower frames, wherein the upper frames and the corresponding lower frames are detachably connected, the lower surface of the upper frame is in contact with the upper surface of the corresponding lower frame, the three upper frames and lower frames are distributed at the same vertical spacing, and the upper surface of the upper frame is provided with several grooves.

[0009] Preferably, the upper frame has symmetrical slots on its inner side, the lower frame is inserted into the corresponding slots, the upper surface of the upper frame has symmetrical through-type movable slots, one side of the lower frame has a symmetrically fixed positioning post, and the positioning post is engaged in the corresponding movable slot. The upper surface of the positioning post has a fixed limiting plate, and the lower surface of the limiting plate is in movable contact with the corresponding upper frame.

[0010] Preferably, insert blocks are inserted into three grooves on one of the upper frames, and a limiting plate is fixed on the upper surface of the insert blocks. Springs are symmetrically fixed between the limiting plate and the corresponding upper frame. Several through rectangular slots are opened on the upper surface of the lower frame, and insert blocks are inserted into the corresponding rectangular slots. Four springs are provided on the lower surface of one of the limiting plates, and the four springs are distributed in a rectangular shape.

[0011] Preferably, side blocks are symmetrically fixed on the outer surfaces of the upper frame and the lower frame. Support rods are fixed on the lower surfaces of the uppermost and middle side blocks, and positioning blocks are fixed on the upper surfaces of the middle and lowermost side blocks. The positioning blocks are inserted into the corresponding support rods, and the support rods and the corresponding positioning blocks are fixedly connected by bolts. A caster wheel is rotatably provided on the lower surface of the lowermost side block.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The upper and lower frames of this utility model are detachably connected. The three-layer structure is assembled by inserting and unplugging the support rods and positioning blocks and fixing them with bolts. After disassembly, each component can be classified and stored, which greatly reduces the space occupied when idle, and is especially suitable for small-area storage scenarios.

[0014] 2. This utility model uses a longitudinal anti-dislodgement design of slots, positioning posts and movable grooves, and limiting plates, as well as a lateral anti-slip design of insert blocks and rectangular grooves, combined with bolt fixing of support rods and positioning blocks, to restrict the relative displacement of components in multiple dimensions in the longitudinal and lateral directions, and prevent the cart from becoming loose or shaking during use. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2This is an exploded view of the upper and lower frame structures located in the middle of this utility model.

[0018] Figure 3 This is an exploded view of the cross-section of the limiting plate and its related structures of this utility model.

[0019] In the diagram: 1. Upper frame; 11. Slot; 2. Lower frame; 21. Movable slot; 22. Positioning post; 23. Limiting plate; 3. Side block; 31. Support rod; 32. Positioning block; 4. Groove; 41. Insert block; 42. Limiting plate; 43. Spring; 44. Rectangular slot; 5. Caster wheel. Detailed Implementation

[0020] 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.

[0021] Example: Figure 1-3 As shown, this utility model provides a convenient three-layer plastic trolley for storage, including three upper frames 1 and three lower frames 2. The upper frames 1 and the corresponding lower frames 2 are detachably connected. The lower surface of the upper frame 1 is in contact with the upper surface of the corresponding lower frame 2. The three upper frames 1 and lower frames 2 are distributed at the same vertical spacing. The upper surface of the upper frame 1 has several grooves 4. The inner side of the upper frame 1 has symmetrical slots 11. The lower frames 2 are inserted into the corresponding slots 11. The upper surface of the upper frame 1 has symmetrical through-type movable slots 21. The lower frames 2 are symmetrically fixed with positioning posts 22 on one side, and the positioning posts 22 are engaged in the corresponding movable slots 21. The upper surface of the positioning posts 22 is fixed with a limit. The lower surface of the limiting plate 23 is in contact with the corresponding upper frame 1. First, the three lower frames 2 are inserted into the slots 11 symmetrically opened on the inner side of the three upper frames 1 respectively, so that the lower surface of the upper frame 1 and the upper surface of the corresponding lower frame 2 form a movable contact, initially realizing the longitudinal docking of a single set (upper frame 1 + lower frame 2) structure. At the same time, the positioning pins 22 symmetrically fixed on one side of the lower frame 2 will be inserted into the through movable slots 21 symmetrically opened on the upper surface of the upper frame 1. The lower surface of the limiting plate 23 fixed on the upper surface of the positioning pin 22 is in contact with the upper frame 1. Through the blocking effect of the limiting plate 23, the upper frame 1 and the lower frame 2 are prevented from separating longitudinally, thus completing the longitudinal anti-detachment limiting of the single set structure.

[0022] Insert blocks 41 are inserted into three grooves 4 on one of the upper frames 1, and a limiting plate 42 is fixedly mounted on the upper surface of the insert blocks 41. Springs 43 are symmetrically fixed between the limiting plate 42 and the corresponding upper frame 1. Several through rectangular slots 44 are formed on the upper surface of the lower frame 2, and the insert blocks 41 are inserted into the corresponding rectangular slots 44. Four springs 43 are located on the lower surface of one of the limiting plates 42, and the four springs 43 are arranged in a rectangular pattern. For one of the upper frames 1, [the following is a description of the grooves 41 and their corresponding slots 44]. Insert blocks 41 are inserted into several grooves 4. A limiting plate 42 fixed on the upper surface of the insert block 41 is symmetrically fixed with a spring 43 between it and the upper frame 1 (and there are four springs 43 on the lower surface of the limiting plate 42, which are distributed in a rectangular pattern). The elastic force of the spring 43 can push the insert block 41 to move downward, so that the lower end of the insert block 41 is inserted into several through rectangular grooves 44 opened on the upper surface of the lower frame 2. By engaging the insert block 41 with the rectangular grooves 44, the lateral relative sliding between the upper frame 1 and the lower frame 2 is restricted, and the single-unit structure is further fixed.

[0023] Side blocks 3 are symmetrically fixed to the outer surfaces of both the upper frame 1 and the lower frame 2. Support rods 31 are fixed to the lower surfaces of the uppermost and middle side blocks 3, and positioning blocks 32 are fixed to the upper surfaces of the middle and lowermost side blocks 3. The positioning blocks 32 are inserted into the corresponding support rods 31, and the support rods 31 and corresponding positioning blocks 32 are fixedly connected by bolts. A caster wheel 5 is rotatably mounted on the lower surface of the lowermost side block 3. The three sets of (upper frame 1 + lower frame 2) that have been individually fixed are arranged at equal vertical intervals. The trolley is constructed using side blocks 3 symmetrically fixed to the outer surfaces of the upper frame 1 and lower frame 2 to achieve a three-layer connection. Support rods 31 are fixed to the lower surfaces of the uppermost and middle side blocks 3, and positioning blocks 32 are fixed to the upper surfaces of the middle and lowermost side blocks 3. After the positioning blocks 32 are inserted into the support rods 31, the support rods 31 and the corresponding positioning blocks 32 are fixedly connected by bolts to ensure that the spacing of the three-layer structure is stable and the whole structure is firm. Finally, the omnidirectional wheels 5 rotatably set on the lower surface of the lowermost side block 3 enable the trolley to move flexibly.

[0024] Working principle: First, the three lower frames 2 are respectively inserted into the slots 11 symmetrically opened on the inner side of the three upper frames 1, so that the lower surface of the upper frame 1 and the upper surface of the corresponding lower frame 2 form a movable contact, initially realizing the longitudinal docking of a single set (upper frame 1 + lower frame 2) structure; at the same time, the positioning pins 22 symmetrically fixed on one side of the lower frame 2 will be inserted into the through movable slots 21 symmetrically opened on the upper surface of the upper frame 1, and the lower surface of the limiting plate 23 fixed on the upper surface of the positioning pin 22 is in movable contact with the upper frame 1. Through the blocking effect of the limiting plate 23, the upper frame 1 and the lower frame 2 are prevented from separating longitudinally, thus completing the longitudinal anti-detachment limiting of the single set structure.

[0025] For one of the upper frames 1, insert blocks 41 are inserted into several grooves 4 on its surface. A limiting plate 42 fixed on the upper surface of the insert block 41 is symmetrically fixed with the upper frame 1 and a spring 43 (and there are four springs 43 on the lower surface of the limiting plate 42, which are distributed in a rectangular shape). The elastic force of the spring 43 can push the insert block 41 to move downward, so that the lower end of the insert block 41 is inserted into several through rectangular grooves 44 on the upper surface of the lower frame 2. By the engagement of the insert block 41 with the rectangular grooves 44, the lateral relative sliding between the upper frame 1 and the lower frame 2 is restricted, and the single structure is further fixed.

[0026] The three sets of single-unit fixed (upper frame 1 + lower frame 2) are distributed at the same vertical spacing. The three-layer connection is achieved by using the side blocks 3 that are symmetrically fixed on the outer surface of each upper frame 1 and lower frame 2. The lower surface of the uppermost and middle side blocks 3 are fixed with support rods 31, and the upper surface of the middle and lowermost side blocks 3 are fixed with positioning blocks 32. After the positioning blocks 32 are inserted into the support rods 31, the support rods 31 and the corresponding positioning blocks 32 are fixedly connected by bolts to ensure that the spacing of the three-layer structure is stable and the whole structure is firm. Finally, the omnidirectional wheels 5 that are rotatably set on the lower surface of the lowermost side block 3 are used to realize the flexible movement of the whole trolley.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A plastic three-tier trolley for easy storage, comprising three upper trolleys (1) and three lower trolleys (2), characterized in that: The upper frame (1) is detachably connected to the corresponding lower frame (2). The lower surface of the upper frame (1) is in contact with the upper surface of the corresponding lower frame (2). The three upper frames (1) and lower frames (2) are distributed at the same vertical spacing. The upper surface of the upper frame (1) is provided with several grooves (4).

2. A plastic three-tiered stroller for easy storage as recited in claim 1, wherein: Side blocks (3) are symmetrically fixed on the outer surfaces of the upper frame (1) and the lower frame (2). Support rods (31) are fixed on the lower surfaces of the uppermost and middle side blocks (3). Positioning blocks (32) are fixed on the upper surfaces of the middle and lower side blocks (3). The positioning blocks (32) are inserted into the corresponding support rods (31). The support rods (31) and the corresponding positioning blocks (32) are fixedly connected by bolts.

3. A plastic three-tiered stroller for easy storage as recited in claim 2, wherein: The lower surface of the bottommost side block (3) is provided with a caster wheel (5).

4. A plastic three-tier cart for easy storage as recited in claim 1, wherein: The upper frame (1) has symmetrical slots (11) on its inner side, and the lower frame (2) is inserted into the corresponding slots (11).

5. A plastic three-tier cart for easy storage as recited in claim 1, wherein: The upper surface of the upper frame (1) is symmetrically provided with through-type movable slots (21), and the lower frame (2) is symmetrically fixed with positioning posts (22) on one side, and the positioning posts (22) are locked in the corresponding movable slots (21).

6. A plastic three-tiered cart for easy storage as recited in claim 5, wherein: The upper surface of the positioning post (22) is fixedly provided with a limiting plate (23), and the lower surface of the limiting plate (23) is movably fitted with the corresponding upper frame (1).

7. A plastic three-tier cart for easy storage as recited in claim 1, wherein: Insertion blocks (41) are inserted into three grooves (4) on one of the upper frames (1), and a limiting plate (42) is fixedly provided on the upper surface of the insertion block (41). A spring (43) is symmetrically fixed between the limiting plate (42) and the corresponding upper frame (1). Several through rectangular slots (44) are opened on the upper surface of the lower frame (2), and the insertion blocks (41) are inserted into the corresponding rectangular slots (44).

8. A plastic three-tiered cart for easy storage as recited in claim 7, wherein: Four springs (43) are provided on the lower surface of one of the limiting plates (42), and the four springs (43) are arranged in a rectangular shape.

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