Bottom plate limiting structure of four-wheel cart

Abstract

The utility model discloses a four-wheel cart bottom plate limiting structure which comprises a cart body, and a cart fork and wheels arranged on the cart fork are arranged at the bottom of the cart body. The bottom plate is rotationally installed on the side, away from the handle, of the cart body, the buffer adjusting mechanism is installed at the end, making contact with the cart fork, of the bottom plate, and the maximum opening angle of the bottom plate relative to the cart body is adjusted by adjusting the position of the buffer adjusting mechanism. According to the utility model, the bottom plate which is in contact support with the fork of the cart main body is designed, and the buffer adjusting mechanism is combined, so that not only can the bearing capacity of the bottom plate be effectively improved, but also the buffer and impact-resistant functions can be provided when the bottom plate is opened to the maximum angle. Meanwhile, the structural design avoids dependence on additional limiting pieces, the structure of the bottom plate is more concise and durable, flexible adjustment of the supporting angle of the bottom plate is achieved through the adjustable buffering mechanism, and the requirements in different use scenes are met.

Description

Technical Field

[0001] The utility model relates to the field of four-wheel carts, in particular to a bottom plate limiting structure of a four-wheel cart. Background Art

[0002] Four-wheeled carts are a common transport tool. They feature high load-bearing capacity and flexible handling, making them widely used in logistics, warehousing, and production workshops. In traditional four-wheeled cart designs, the base plate typically serves as the primary load-bearing structure. However, in actual use, the base plate's structural design often faces the following technical challenges:

[0003] After the existing four-wheeled cart bottom plate is opened, it usually requires additional limiters or fixing devices to maintain its angle. The limiters not only increase the structural complexity of the cart, but may also become loose or fail due to vibration or long-term use, thereby affecting the supporting stability of the bottom plate.

[0004] After the bottom plates of some carts are opened, their load-bearing capacity is weak due to the lack of reasonable support structure design. Especially when loading heavy goods or encountering bumpy roads, they are easily affected by impact forces, causing the bottom plates to deform or even be damaged, thus reducing the service life of the carts.

[0005] Existing floorboard designs often rely on rigid support, lacking effective cushioning and adjustment mechanisms. When the cart travels on uneven surfaces, the impact of the load on the floorboard is directly transmitted to the floorboard, potentially causing fatigue damage or reducing the cart's overall stability. Furthermore, since the floorboard's opening angle cannot be adjusted, its adaptability to various scenarios is limited, making it difficult to meet the needs of varying transportation conditions. Summary of the Invention

[0006] To address these issues, the present invention provides a four-wheeled stroller floor plate limiting structure. By designing a floor plate that supports the stroller's main fork and incorporating a buffer adjustment mechanism, this structure not only effectively improves the floor plate's load-bearing capacity but also provides cushioning and impact resistance when the floor plate is opened to its maximum angle. This structural design eliminates the need for additional limiting components, making the floor plate structure more concise and durable. Furthermore, the adjustable buffer mechanism allows for flexible adjustment of the floor plate's support angle to meet the needs of various usage scenarios.

[0007] The utility model is realized by the following technical solutions: a four-wheeled cart bottom plate limiting structure, comprising:

[0008] A cart body, wherein a fork and wheels are provided on the fork at the bottom of the cart body, and a handle is also provided on the cart body;

[0009] A bottom plate is rotatably mounted on a side of the cart body away from the handle, and when the bottom plate is opened relative to the cart body, one end of the bottom plate contacts and supports the fork;

[0010] A buffer adjustment mechanism is installed at the end of the base plate that contacts the fork, and the maximum opening angle of the base plate relative to the cart body is adjusted by adjusting the position of the buffer adjustment mechanism.

[0011] As a preferred technical solution, a hinged ear is provided at the bottom of the base plate, and the hinged ear is connected to the cart body via a bolt shaft.

[0012] As a preferred technical solution, a contact support section is formed at the bottom of the base plate, and the buffer adjustment mechanism is arranged on the contact support section.

[0013] As a preferred technical solution, the buffer adjustment mechanism includes a support slider, and the support slider is slidably installed in a support slot provided on the contact support section;

[0014] It also includes an elastic support member, which is installed at the tail end of the supporting slider and is used to elastically support the supporting slider.

[0015] As a preferred technical solution, the elastic support member includes an adjusting bolt, the adjusting bolt is threadedly mounted on a positioning plate, the positioning plate is fixedly mounted in the supporting slide groove, a supporting spring is installed on the head of the adjusting bolt, one end of the supporting spring is fixedly connected to the adjusting bolt, and the other end extends into the spring hole set at the tail end of the supporting slider.

[0016] As a preferred technical solution, the support slider is "H"-shaped, and the support slider and the fork positioning support on the cart body.

[0017] The beneficial effects of the present invention are as follows: the present invention realizes a stable support capability of the bottom plate after opening without the need for additional limiters through the contact support design between the bottom plate and the fork of the cart body, which greatly simplifies the structure of the cart, and at the same time enhances the load-bearing capacity of the bottom plate and improves the overall performance;

[0018] In addition, the designed buffer adjustment mechanism can effectively adjust the maximum opening angle of the floor, making it suitable for various usage scenarios. When the load impacts the floor, the buffer adjustment mechanism can provide a certain buffering capacity, reducing the direct impact of the impact force on the floor. Especially when transporting on bumpy roads, it effectively protects the floor from damage and extends its service life.

[0019] This structure ensures the stability and reliability of the support angle through innovative slide and elastic support design, while reducing the risk of cargo shifting in a vibrating environment, further improving the safety and durability of the cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0023] Figure 3 For this utility model Figure 2 A partial enlarged view of point A in the middle;

[0024] Description of reference numerals:

[0025] 1. Cart body; 6. Fork; 5. Wheel; 3. Handle; 2. Bottom plate; 7. Articulated ear; 4. Bolt shaft; 8. Contact support section; 9. Support slider; 12. Support slide; 14. Adjusting bolt; 13. Positioning plate; 11. Support spring. DETAILED DESCRIPTION

[0026] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0027] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0028] like Figure 1-Figure 3 As shown, the present invention relates to a four-wheeled cart with a bottom plate 2 limiting structure. The structure includes a cart body 1, a fork 6 disposed at the bottom of the cart body 1, and wheels 5 mounted on the fork 6. A handle 3 is also disposed on the top of the cart body 1 for pushing or pulling the cart. A stable support structure is formed between the bottom of the cart body 1 and the fork 6, ensuring good stability and load-bearing capacity during movement.

[0029] One end of the base plate 2 is pivotally mounted on the side of the cart body 1 away from the handle 3. When the base plate 2 is opened, the end away from the hinged portion contacts the fork 6 on the cart body 1, thereby providing support for the base plate 2. This design eliminates the need for additional stoppers to secure the base plate 2 as in traditional carts. By providing support directly through the fork 6, the base plate 2 not only simplifies the cart structure but also enhances its load-bearing capacity, while reducing manufacturing costs and the complexity of subsequent maintenance.

[0030] To adjust the opening angle of the base plate 2, a buffer adjustment mechanism is installed on the contact support section 8 of the base plate 2. The position of the buffer adjustment mechanism is adjustable. By adjusting the position of the mechanism, the maximum opening angle of the base plate 2 relative to the stroller body 1 can be controlled. This adjustability allows the base plate 2 to adapt to different usage scenarios. For example, in a narrow space, the user can adjust the opening angle of the base plate 2 to meet specific spatial constraints.

[0031] A hinged lug 7 is provided at the bottom of the base plate 2 and connected to the cart body 1 via a bolt shaft 4. This hinged design ensures the stability of the base plate 2 and provides a reliable rotational connection, allowing the base plate 2 to be smoothly opened and closed when needed. The rational structural design of the hinged lug 7 can withstand heavy loads and frequent use, extending the service life of the base plate 2.

[0032] A contact support section 8 is also formed at the bottom of the base plate 2 for use in conjunction with the buffer adjustment mechanism. The buffer adjustment mechanism includes a support slider 9 slidably mounted on the contact support section 8. The support slider 9 is designed as a sliding structure and is installed in a support slide 12 provided on the contact support section 8. It can move smoothly in the slide to achieve precise adjustment of the support angle of the base plate 2. An elastic support member is installed at the tail end of the support slider 9. The elastic support member provides an elastic support function for the support slider 9, so that the base plate 2 can withstand a certain impact force when it is opened to the maximum angle, thereby reducing the direct impact of the load on the base plate 2, especially when transporting on bumpy roads, which plays a role in protecting the base plate 2.

[0033] The elastic support member specifically includes an adjustment bolt 14, which is threadedly mounted on a positioning plate 13, which is fixedly mounted within the support chute 12. A support spring 11 is mounted on the head of the adjustment bolt 14. One end of the support spring 11 is fixedly connected to the adjustment bolt 14, and the other end extends into a spring hole at the rear end of the support slider 9. By adjusting the position of the adjustment bolt 14, the degree of compression of the support spring 11 can be varied, thereby adjusting the elastic support force of the support slider 9. This design is both simple and practical, allowing the cushioning performance of the base plate 2 to be adjusted according to actual needs.

[0034] Furthermore, the support slider 9 is designed as an "H"-shaped structure, which forms a positioning support with the fork 6 on the stroller body 1. The "H" shape allows the support slider 9 to slide more stably within the slide slot, making it less likely to deviate or get stuck. At the same time, it increases the contact area between the support slider 9 and the fork 6, further improving the stability of the base plate 2 after it is opened.

[0035] Through the above design, the utility model provides a simple and reliable bottom plate 2 limiting structure. While improving the bearing capacity of the bottom plate 2, the introduction of the buffer adjustment mechanism enables the bottom plate 2 to adapt to a variety of usage scenarios and effectively reduces the damage to the bottom plate 2 caused by vibration during transportation, thereby improving the safety and service life of the cart.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that do not require creative effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A four-wheeled cart bottom plate limiting structure, characterized in that: include: A cart body (1), wherein a fork (6) and a wheel (5) arranged on the fork (6) are provided at the bottom of the cart body (1), and a handle (3) is also provided on the cart body (1); A bottom plate (2) is rotatably mounted on a side of the cart body (1) away from the handle (3); after the bottom plate (2) is opened relative to the cart body (1), one end of the bottom plate (2) contacts and supports the fork (6); A buffer adjustment mechanism is installed at the end of the base plate (2) in contact with the fork (6), and the maximum opening angle of the base plate (2) relative to the cart body (1) is adjusted by adjusting the position of the buffer adjustment mechanism.

2. The bottom plate limiting structure of the four-wheeled cart according to claim 1, characterized in that: A hinged ear (7) is provided at the bottom of the base plate (2), and the hinged ear (7) is connected to the trolley body (1) via a bolt shaft (4).

3. The bottom plate limiting structure of the four-wheeled cart according to claim 1, characterized in that: A contact support section (8) is formed at the bottom of the base plate (2), and the buffer adjustment mechanism is arranged on the contact support section (8).

4. The bottom plate limiting structure of the four-wheeled cart according to claim 3, characterized in that: The buffer adjustment mechanism includes a support slider (9), and the support slider (9) is slidably mounted in a support slot (12) provided on the contact support section (8); It also includes an elastic support member, which is installed at the tail end of the support slider (9) and is used to elastically support the support slider (9).

5. The bottom plate limiting structure of the four-wheeled cart according to claim 4, characterized in that: The elastic support member includes an adjusting bolt (14), the adjusting bolt (14) is threadedly mounted on a positioning plate (13), the positioning plate (13) is fixedly mounted in the supporting slide groove (12), a supporting spring (11) is mounted on the head of the adjusting bolt (14), one end of the supporting spring (11) is fixedly connected to the adjusting bolt (14), and the other end extends into a spring hole provided at the tail end of the supporting slider (9).

6. The bottom plate limiting structure of the four-wheeled cart according to claim 4, characterized in that: The support slider (9) is in an "H" shape, and the support slider (9) and the fork (6) on the cart body (1) are positioned and supported.

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