A lightweight outdoor handcart
By designing a worm gear transmission mechanism to drive the enclosure rotation, the problems of labor-intensive loading and unloading of handcarts and low loading and unloading efficiency in complex terrain are solved, achieving labor-saving and efficient cargo loading, unloading and transportation stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO ZHOUNGWEI HAND TRUCK CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-26
AI Technical Summary
Existing handcarts require a lot of physical effort to load and unload goods, pose a risk of bumps and knocks, and lack effective transition and connection structures, making it difficult to achieve smooth loading and unloading on complex outdoor terrain, resulting in low loading and unloading efficiency.
An outdoor lightweight handcart was designed, which includes a storage base, a lightweight loading and unloading enclosure, base rollers, a worm gear, a drive shaft, mounting blocks, a vertical arm handle, and casters. The enclosure is driven to rotate through a worm gear transmission mechanism, enabling tilted transition loading and unloading and closed enclosure, reducing frictional resistance and adapting to complex terrain.
It enables labor-saving and efficient cargo loading and unloading, reduces physical exertion during the loading and unloading process, improves loading and unloading efficiency, and prevents cargo from shifting during transportation, making it suitable for heavy-duty handling.
Smart Images
Figure CN224277232U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of handcart technology, and in particular relates to an outdoor lightweight handcart. Background Technology
[0002] In the field of outdoor freight transportation, handcarts are indispensable handling tools. However, existing handcarts generally suffer from technical bottlenecks that make loading and unloading inconvenient. Traditional handcarts typically have fixed enclosures, requiring manual labor to lift goods directly from the ground to the cart's loading platform or to unload them in reverse. This vertical lifting method is particularly arduous for large and heavy goods, posing a risk of damage. Furthermore, the lack of a transitional structure between the fixed enclosures and the ground forces goods to overcome height differences during loading and unloading, resulting in a time-consuming, labor-intensive, and inefficient process. In addition, complex outdoor terrain (such as slopes and uneven surfaces) further exacerbates the difficulty of lifting and unloading. Current technologies lack effective solutions that can achieve smooth loading and unloading through structural innovation, failing to meet users' actual needs for convenient and labor-saving loading and unloading.
[0003] Therefore, it is essential to invent a lightweight outdoor handcart. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides an outdoor lightweight handcart, including a storage base frame, a lightweight detachable enclosure, base frame rollers, a worm gear, a drive shaft, mounting blocks, a vertical arm handle, casters, and a push frame. Two sets of parallel base frame rollers are rotatably mounted on the storage base frame. The lightweight detachable enclosure, rotatably mounted on the storage base frame, meshes with the worm gear. The worm gear is fixedly mounted at one end of the drive shaft, and the other end of the drive shaft rotatably passes through several mounting blocks fixedly mounted below the storage base frame, with a vertical arm handle fixedly mounted at its end. Four symmetrical casters are fixedly mounted below the storage base frame, and a push frame is fixedly mounted at one end of the storage base frame.
[0005] Preferably, the storage base is an "E" shaped structure, with two sets of parallel base rollers rotatably mounted on the rectangular area formed on both sides of the storage base, and several horizontally arranged mounting blocks mounted below the middle crossbeam of the storage base.
[0006] Preferably, a lightweight, detachable enclosure is rotatably mounted on the open end of the storage base, and the lightweight, detachable enclosure is positioned opposite to the storage base that is fixedly mounted on the other end of the push frame.
[0007] Preferably, the lightweight detachable enclosure includes a crossbeam shaft, side plates, a worm gear, a movable plate, enclosure rollers, a bottom contact frame, and side rails. The crossbeam shaft is rotatably mounted on the open end of the storage base frame, with oppositely arranged side plates fixedly mounted at both ends. A worm gear is fixedly mounted in the middle, and the worm gear is fixedly connected to one end of the movable plate and meshes with a worm. Several enclosure rollers are rotatably mounted between the movable plate and the two side plates. A bottom contact frame is fixedly mounted on the outer side of one end of each side plate, and a side rail is fixedly mounted on its upper surface.
[0008] Preferably, the open end of the storage base, i.e., one end located at the middle crossbeam, is provided with a slot, and the worm gear fixedly installed in the middle of the crossbeam shaft is located inside the slot and meshes with the worm below.
[0009] Preferably, the worm gear and the movable plate are located between the two side plates. Several vertical side rails are arranged horizontally on the upper surface of each side plate. The bottom frame fixedly installed on one side is an "L" shaped structure, and its bottom end is allowed to make stable contact with the ground.
[0010] Preferably, the lightweight detachable enclosure is in a horizontal state in its initial state. The lightweight detachable enclosure allows to rotate 90 degrees clockwise and be perpendicular to the ground, thereby achieving enclosure on three sides of the storage base. When rotated 5-10 degrees counterclockwise, the bottom of the base frame makes stable contact with the ground, and the whole structure is in an inclined state.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] This utility model adopts an inclined transition loading and unloading method, which is labor-saving and efficient. When loading and unloading goods, the lightweight loading and unloading enclosure can be rotated counterclockwise by 5-10° to make the bottom of the base frame make smooth contact with the ground, forming an inclined transition channel. At this time, the enclosure rollers and the ground form a continuous bearing surface. There is no need for manual lifting. The goods on the ground can be pushed along the inclined enclosure rollers to the storage base, or slid from the storage base to the ground along the rollers. This significantly reduces the physical consumption of the loading and unloading process, and is especially suitable for heavy object handling, thus improving loading and unloading efficiency.
[0013] This invention utilizes a 90° clockwise rotation of a lightweight, detachable enclosure to bring it perpendicular to the ground and create a three-sided enclosure structure for the cargo rack. In this state, the enclosure rollers stop rotating, and together with the side rails, form a closed protective space, effectively preventing goods from shifting due to roller slippage or bumps during transportation, ensuring stable cargo support. The enclosure rotation is driven by a worm gear transmission mechanism, requiring minimal operating torque; switching states can be completed with a single hand rotation of the boom handle, making human-machine interaction convenient.
[0014] This utility model features a lightweight, detachable enclosure with multiple enclosure rollers between the movable panel and the side panel, forming a low-friction sliding contact surface. During loading and unloading, goods roll along the rollers, and compared to the sliding friction of traditional fixed enclosures, goods can be easily pushed even by a single operator. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the bottom structure of this utility model.
[0017] Figure 3 This is a schematic diagram of the structure of the lightweight, detachable enclosure in its vertical state.
[0018] Figure 4 This is a structural schematic diagram of the lightweight, detachable enclosure of this utility model.
[0019] In the picture:
[0020] 1. Storage base frame; 2. Lightweight loading and unloading enclosure; 21. Crossbeam shaft; 22. Side plate; 23. Worm gear; 24. Movable plate; 25. Enclosure roller; 26. Base frame; 27. Side rail; 3. Base frame roller; 4. Worm gear; 5. Drive shaft; 6. Mounting block; 7. Vertical arm handle; 8. Casters; 9. Hand push frame. Detailed Implementation
[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0022] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for 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 present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.
[0023] As attached Figure 1 To be continued Figure 4 As shown:
[0024] This utility model provides an outdoor lightweight handcart, including a storage base frame 1, a lightweight detachable enclosure 2, base frame rollers 3, a worm gear 4, a drive shaft 5, mounting blocks 6, a vertical arm handle 7, casters 8, and a push frame 9. Two sets of parallel base frame rollers 3 are rotatably mounted on the storage base frame 1. The lightweight detachable enclosure 2, rotatably mounted on the storage base frame 1, is engaged with the worm gear 4. The worm gear 4 is fixedly mounted at one end of the drive shaft 5. The other end of the drive shaft 5 rotates sequentially through several mounting blocks 6 fixedly mounted below the storage base frame 1, and a vertical arm handle 7 is fixedly mounted at its end. Four symmetrical casters 8 are fixedly mounted below the storage base frame 1, and a push frame 9 is fixedly mounted at one end of the storage base frame 1.
[0025] Furthermore, the storage base 1 is made of lightweight, high-strength aluminum alloy and integrally extruded into an "E"-shaped structure; its two sets of parallel base rollers 3 are rotatably installed in the rectangular area formed on both sides of the storage base 1 through deep groove ball bearings, and the surface of the rollers is covered with a rubber anti-slip layer to increase the friction between the goods and the rollers; several horizontally arranged mounting blocks 6 are fixed at equal intervals to the bottom surface of the middle crossbeam of the storage base 1 by M8 bolts, and the mounting blocks 6 are used to support the rotational connection of the drive shaft 5.
[0026] Furthermore, a lightweight, detachable enclosure 2 is rotatably mounted on the open end of the storage base 1 (i.e., the front end of the middle crossbeam and the two side crossbeams) via two thrust ball bearings; the lightweight, detachable enclosure 2 is arranged opposite to the push frame 9, the lower end of the push frame 9 is fixed to the rear end of the storage base 1, one end of the push frame 9 is tilted upward at 45° to form an ergonomic grip area, and the lightweight, detachable enclosure 2 is correspondingly set at the front end of the storage base 1.
[0027] Furthermore, the lightweight loading and unloading enclosure 2 includes a crossbeam shaft 21, side plates 22, worm gears 23, movable plates 24, enclosure rollers 25, bottom-contact frames 26, and side rails 27. The crossbeam shaft 21 is fixedly connected at both ends to the oppositely arranged side plates 22 via flat keys, and the worm gear 23 is fixedly installed in the middle section via a keyway. The worm gear 23 is fixedly connected to one end of the movable plate 24. At least five enclosure rollers 25 are rotatably installed between the movable plate 24 and the two side plates 22, and their surfaces are polished to reduce frictional resistance when goods slide. A bottom-contact frame 26 is welded to the outer side of one end of each side plate 22, and five vertical side rails 27 are evenly welded laterally to its upper surface, forming an enclosure structure to prevent goods from tipping over.
[0028] Furthermore, a rectangular slot is provided on the bottom surface of the open end of the storage base 1 (i.e. the front end of the middle crossbeam). The worm gear 23, which is fixedly installed in the middle of the crossbeam shaft 21, is completely embedded in the inside of the slot. This allows the worm gear 23 to rotate on its own and forms a vertical meshing transmission with the worm 4 below. When the arm handle 7 is turned, the transmission shaft 5 drives the worm 4 to rotate, which in turn drives the worm gear 23 and the lightweight loading and unloading enclosure 2 to rotate synchronously.
[0029] Furthermore, the worm gear 23 and the movable plate 24 are located between the two side plates 22; several vertical side rails 27 are horizontally arranged on the upper surface of each side plate 22; the bottom contact frame 26 fixedly installed on the outer side of one end of each side plate 22 has an "L" shaped structure. When the lightweight loading and unloading enclosure 2 is rotated counterclockwise by 5-10°, the bottom end of the bottom contact frame 26 makes stable contact with the ground, so that the enclosure roller 25 forms a 5° tilt angle with the ground, which facilitates the loading and unloading of goods along the roller; when rotated clockwise by 90°, the side plate 22 is perpendicular to the storage base 1, and the side rails 27 cooperate with the push frame 9 to form a closed enclosure space to prevent the goods from sliding and shifting during transportation.
[0030] The working principle is as follows: First, when loading and unloading operations are required, the user holds and rotates the boom handle 7, driving the drive shaft 5, which is fixedly connected to it, to rotate. The drive shaft 5 drives the worm gear 4, which is fixedly installed at the other end, to rotate synchronously. The worm gear 4 meshes with the worm wheel 23 of the lightweight loading and unloading enclosure 2, thereby driving the crossbeam shaft 21 to rotate counterclockwise 5-10° around the thrust ball bearing at the opening end of the storage base 1 until the bottom end of the "L"-shaped contact frame 26 on the outer side of the side plate 22 makes stable contact with the ground. At this time, the lightweight loading and unloading enclosure 2 is in an inclined state, and the enclosure roller 25 forms a continuous inclined transition surface with the ground. Goods can be directly pushed from the ground along the enclosure roller 25 to the base frame roller 3 on the storage base 1, or slid from the base frame roller 3 along the enclosure roller 25 to the ground. The rolling friction of the rollers significantly reduces the resistance to the movement of goods, realizing lightweight loading and unloading.
[0031] Then, after the goods are loaded and unloaded, the user turns the boom handle 7 in the opposite direction, which drives the worm wheel 23 and the crossbeam shaft 21 to rotate 90° clockwise through the drive shaft 5 and the worm gear 4, so that the side plate 22 of the lightweight loading and unloading enclosure 2 is perpendicular to the storage base 1; at this time, the whole structure forms a three-sided enclosure structure, and the enclosure roller 25 stops rolling because the movable plate 24 is fixed with the worm wheel 23, forming a closed enclosure space, which effectively prevents the goods from shifting or falling off due to bumps or roller slippage during transportation.
[0032] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. A lightweight outdoor handcart, characterized in that, The device includes a storage base (1), a lightweight detachable enclosure (2), base rollers (3), a worm gear (4), a drive shaft (5), mounting blocks (6), a vertical arm handle (7), casters (8), and a push frame (9). Two sets of parallel base rollers (3) are rotatably mounted on the storage base (1). The lightweight detachable enclosure (2) rotatably mounted on the storage base (1) is engaged with the worm gear (4). The worm gear (4) is fixedly mounted on one end of the drive shaft (5). The other end of the drive shaft (5) rotates through several mounting blocks (6) fixedly mounted below the storage base (1) in sequence, and a vertical arm handle (7) is fixedly mounted on its end. Four symmetrical casters (8) are fixedly mounted below the storage base (1), and a push frame (9) is fixedly mounted on one end of the storage base (1).
2. The outdoor lightweight handcart as described in claim 1, characterized in that: The storage base (1) has an "E" shaped structure. Two sets of parallel base rollers (3) are rotatably installed in the rectangular area formed on both sides of the storage base (1). Several horizontally arranged mounting blocks (6) are installed below the middle crossbeam of the storage base (1).
3. The outdoor lightweight handcart as described in claim 2, characterized in that: The open end of the storage base (1) is rotatably equipped with a lightweight loading and unloading enclosure (2), which is set opposite to the storage base (1) fixedly installed at the other end of the push frame (9).
4. The outdoor lightweight handcart as described in claim 3, characterized in that: The lightweight loading and unloading enclosure (2) includes a crossbeam shaft (21), side plates (22), worm gear (23), movable plate (24), enclosure rollers (25), bottom contact frame (26), and side enclosure rods (27). The crossbeam shaft (21) is rotatably installed at the open end of the storage base (1). The two ends of the crossbeam shaft are fixedly installed with oppositely arranged side plates (22), and the middle is fixedly installed with a worm gear (23). The worm gear (23) is fixedly connected to one end of the movable plate (24) and meshes with the worm (4). Several enclosure rollers (25) are rotatably installed between the movable plate (24) and the two side plates (22). The bottom contact frame (26) is fixedly installed on the outer side of one end of each side plate (22), and the side enclosure rod (27) is fixedly installed on its upper surface.
5. The outdoor lightweight handcart as described in claim 4, characterized in that: The storage base (1) has a slot at the open end, which is located at the middle crossbeam. The worm gear (23) fixedly installed in the middle of the crossbeam shaft (21) is located inside the slot and meshes with the worm (4) below.
6. The outdoor lightweight handcart as described in claim 5, characterized in that: The worm gear (23) and the movable plate (24) are located between the two side plates (22). Several vertical side rails (27) are arranged horizontally on the upper surface of each side plate (22). The bottom frame (26) fixedly installed on one side is an "L" shaped structure, and its bottom end is allowed to make stable contact with the ground.