A trolley wheel fixing device

Abstract

The utility model discloses a kind of handcart wheel fixing devices, including frame (1), the frame (1) is provided with gyro wheel (6), gyro wheel (6) is installed in the mounting groove (7) of frame (1) bottom by mounting block (4);Hub piece (5) is provided in mounting groove (7), mounting block (4) and hub piece (5) buckle and fix.The structure is buckled with the cooperation of mounting block and hub piece, the multidirectional limit fixing of gyro wheel is realized, effectively prevent gyro wheel from appearing in the use process Outward inclination or loosening phenomenon, the connection stability between wheel and frame is enhanced.Installing block adopts detachable design, it is convenient to replace and maintain, overall structure is simple, easy to install, can significantly improve the service life and safety of handcart.

Description

Technical Field

[0001] This utility model relates to a handcart, specifically to a handcart wheel fixing device. Background Technology

[0002] Handcarts, widely used in logistics, warehousing, and household tools, typically consist of a frame, rollers, and fixed components connecting them to the frame. Most existing handcart wheels are bolted or welded directly to the bottom of the frame, with the rollers connected to the bracket via bearings. While this structure provides basic rolling support, under prolonged use or heavy loads, the rollers often tilt outwards (commonly known as "wheel drooping"). This phenomenon is usually caused by the following factors:

[0003] First, the structural rigidity of the mounting area at the bottom of the frame is insufficient, making it prone to deformation under lateral forces, which causes the roller mounting angle to deviate from the vertical direction.

[0004] Second, the mounting block or connector between the roller and the frame has a small bearing area and is not firmly positioned, causing the roller to tilt under lateral force.

[0005] Third, traditional structures are mostly integral welded or threaded fasteners, making maintenance and replacement inconvenient. Once wear or loosening occurs, the entire structure must be replaced, resulting in high maintenance costs.

[0006] To address the aforementioned problems, while existing technologies have improved connection strength by thickening the mounting plate or adding reinforcing ribs, they still struggle to effectively prevent wheel slippage structurally. This is because a connection structure providing multi-directional limiting and stable support has not been developed. Therefore, providing a stable, reliable, and easily maintainable handcart wheel fixing device has become a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0007] To address the aforementioned problems, this utility model provides a wheel fixing device for handcarts, which effectively overcomes the shortcomings of existing technologies.

[0008] This utility model is achieved through the following technical solution: a handcart wheel fixing device, comprising:

[0009] A frame, on which rollers are provided, the rollers being mounted in a mounting groove at the bottom of the frame via a mounting block;

[0010] A hub plate is provided in the mounting groove, and the mounting block is fastened and fixed to the hub plate.

[0011] As a preferred technical solution, the mounting block is provided with an extension hook on the side facing the wheel hub piece, and a hook groove is formed between the extension hook and the mounting block, and the wheel hub piece is snapped into the hook groove.

[0012] As a preferred technical solution, the mounting block is L-shaped.

[0013] As a preferred technical solution, the mounting block is provided with a first screw fixing hole, and the bottom surface of the mounting groove is provided with a second screw fixing hole. The mounting block is fixedly installed in the mounting groove by screws.

[0014] As a preferred technical solution, a positioning part is also provided on the side of the mounting block, and a positioning hole is also provided on the frame corresponding to the position of the positioning part, and the positioning part is positioned and installed in the positioning hole.

[0015] As a preferred technical solution, the frame is also equipped with a push handle.

[0016] The beneficial effects of this utility model are as follows: This utility model proposes a wheel fixing device for a handcart. By setting an installation groove at the bottom of the frame and installing an installation block with an "L" shaped structure in the groove, the installation block is provided with an extension hook and a hook groove structure, which are fastened and fixed with the wheel hub to form a multi-faceted contact support, thereby effectively limiting the lateral swing and tilt of the roller.

[0017] The L-shaped mounting block is fixed to the bottom of the mounting groove with screws on one hand, and clamps the wheel hub plate with a lateral extension hook on the other. This ensures that when the wheel hub is under stress, the load is not only borne by the screws, but also by the lateral restraint and anti-torsional support provided by the extension hook structure. This structure can generate a reverse resistance force when the roller is subjected to eccentric loads or lateral forces, preventing the wheel from tilting outwards. Furthermore, the mounting block can be independently removed and replaced, avoiding the need for the entire vehicle to be scrapped due to localized wear, further improving the convenience and economy of use and maintenance. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partially enlarged structural diagram of the present invention. Figure 1 ;

[0021] Figure 3 This is a partially enlarged structural diagram of the present invention. Figure 2 ;

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Frame; 4. Mounting block; 7. Mounting slot; 5. Hub plate; 8. Extension hook; 9. Hook slot; 10. First screw fixing hole; 11. Second screw fixing hole; 13. Positioning part; 12. Positioning hole; 2. Push handle; 6. Roller. Detailed Implementation

[0024] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0025] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0026] like Figures 1-3 As shown, this utility model provides a wheel fixing device for a handcart. Its structure is reasonably designed, which can effectively improve the installation stability of the roller 6, prevent the wheel from tilting (protruding) during long-term use, and facilitate disassembly and replacement, thereby improving the service life and maintenance convenience of the whole vehicle.

[0027] The handcart wheel fixing device includes a frame 1, which is a welded metal structure with an overall rectangular frame for supporting a load-bearing platform. Mounting grooves 7 are provided at both ends of the bottom of the frame 1, extending along the width of the frame 1. The bottom and side walls of the mounting grooves 7 are machined to form flat mounting surfaces for mounting the roller 6 assembly. The roller 6 is a support wheel capable of rotating around itself, with bearings at both ends to reduce rolling friction and ensure smooth operation. The roller 6 is mounted in the mounting grooves 7 at the bottom of the frame 1 via mounting blocks 4. The mounting blocks 4 act as a connecting transition between the roller 6 and the frame 1, serving to position, limit, and transmit force.

[0028] A hub plate 5 is provided in the mounting groove 7. The hub plate 5 is connected to the roller 6 and serves as a fixed support for the roller 6. Its outer edge forms a mating relationship with the mounting block 4. The mounting block 4 and the hub plate 5 are fastened together and fixed. The hub plate 5 is fastened into the slot of the mounting block 4, and a stable connection is achieved through mutual interlocking, so that the roller 6 can be reliably fixed to the bottom of the frame 1. Because a fastening structure is used instead of simple screw fastening, the hub and the frame 1 can form multi-point support and surface contact, which significantly improves the load-bearing stability and prevents the roller 6 from tilting or flipping outward under force.

[0029] To enhance installation reliability, an extension hook 8 is provided on the side of the mounting block 4 facing the hub piece 5. A latching groove 9 is formed between the extension hook 8 and the mounting block 4, and the hub piece 5 is snapped into the latching groove. This structure allows the hub piece 5 to slide from the outside under the extension hook 8 during installation and be positioned by the latching groove 9. When the roller 6 is subjected to an outward lateral thrust from the ground, the extension hook 8 generates a reverse restraint force, firmly securing the hub piece 5 within the mounting block 4 and preventing the roller 6's axis from tilting. This structure not only achieves the effect of preventing outward slippage but also forms a closed loop of force transmission: when the roller 6 is subjected to an external force, the force is transmitted through the hub piece 5 to the extension hook 8, and the extension hook 8 then applies the force in the opposite direction to the bottom of the frame 1, thereby achieving stable support.

[0030] Furthermore, the mounting block 4 has an "L"-shaped structure. This "L"-shaped design allows the two vertical surfaces of the mounting block 4 to bear forces in different directions: the horizontal surface bears the vertical load of the roller 6, while the vertical surface resists lateral thrust. Through this dual-force structure, the eccentric load on the roller 6 during travel can be evenly distributed to the bottom and side walls of the frame 1, avoiding structural deformation caused by single-point stress. Compared with the traditional flat mounting block 4, the L-shaped mounting block 4 can form higher bending stiffness and torsional performance, thereby effectively suppressing the outward tilting tendency of the roller 6 and ensuring that the wheel is always perpendicular to the ground.

[0031] To further enhance the connection strength, the mounting block 4 is provided with a first screw fixing hole 10, and the bottom surface of the mounting groove 7 is provided with a second screw fixing hole 11. The mounting block 4 is fixedly installed in the mounting groove 7 by screws. During installation, the operator places the mounting block 4 into the mounting groove 7, aligning the first screw fixing hole 10 with the second screw fixing hole 11, and tightens the screws to achieve a firm connection between the mounting block 4 and the frame 1. The screw tightening not only provides axial fixation but also further improves the anti-slip performance of the mounting block 4 through friction. Compared with the traditional unidirectional fixing method, this double-hole fixing structure can form a larger contact surface and clamping torque, thus enabling the mounting block 4 to remain stable under long-term load and vibration environments, preventing loosening and displacement.

[0032] To ensure the positioning accuracy of the mounting block 4, a positioning part 13 is provided on the side of the mounting block 4, and a positioning hole 12 is provided on the frame 1 corresponding to the position of the positioning part 13. During installation, the operator first inserts the positioning part 13 into the positioning hole 12 on the frame 1, and then completes the final fixation with screws. The positioning part 13 allows the mounting block 4 to achieve preliminary spatial positioning before installation, preventing misalignment and improving assembly accuracy. The mating structure formed by the positioning part 13 and the positioning hole 12 also plays a shear resistance role, effectively resisting the lateral impact load from the rotation of the roller 6, further improving the resistance of the fixing device to external forces.

[0033] During use, when the roller 6 is subjected to lateral thrust (e.g., when a handcart turns or travels on uneven ground), the extension hook 8 and the side wall of the L-shaped mounting block 4 will form a torque balance, thereby counteracting the outward tilting tendency of the hub piece 5. The extension hook 8 acts as a "reverse clamp" structure, preventing the hub from slipping out of the mounting groove 7 when under force; while the L-shaped structure provides spatial restraint, clamping the hub piece 5 vertically between the two planes, achieving multi-directional restraint and fixation. It is precisely due to the multi-point contact, double-sided restraint, and the multiple coordinations of the screw-positioning hole 12 that the device can maintain the vertical posture of the roller 6 under dynamic use conditions, avoiding the problem of the wheel gradually tilting outward in traditional structures.

[0034] Furthermore, the mounting block 4 features a detachable design. When the roller 6 or mounting block 4 becomes worn, there is no need to replace the entire frame 1; simply remove the screws to replace the mounting block 4, simplifying maintenance. This structure significantly reduces operating costs and improves the convenience of later maintenance. The mounting block 4 can be made of high-strength aluminum alloy or engineering plastic to balance weight and strength, and its surface can be treated with an anti-corrosion coating to suit outdoor environments.

[0035] In one embodiment of this utility model, a push handle 2 is also provided on the frame 1. The push handle 2 is fixed to the top of the frame 1 by welding or threaded connection, which makes it convenient for the user to apply force when pushing the handcart. The position of the push handle 2 is matched with the force direction of the roller 6, so that the handcart is subjected to force more smoothly when moving forward or backward, further improving the overall operation stability and user experience.

[0036] This utility model achieves multi-directional limiting and high-strength connection by setting an L-shaped mounting block 4 with an extension hook 8 and a hook groove 9, combined with the snap-fit ​​and screw fixing method of the hub piece 5. It effectively prevents the wheel from lying outward from the structure, improves the stability and reliability of the roller 6 installation, and has the advantages of replaceability and convenient maintenance. It has good practical value and promotion prospects.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A wheel fixing device for a handcart, characterized in that, include: A frame (1) is provided with rollers (6), which are mounted in a mounting groove (7) at the bottom of the frame (1) via a mounting block (4); A hub piece (5) is provided in the mounting groove (7), and the mounting block is fastened and fixed to the hub piece (5); An extension hook (8) is provided on the side of the mounting block (4) facing the hub piece (5), and a hook groove (9) is formed between the extension hook (8) and the mounting block (4), and the hub piece (5) is snapped into the hook groove; The mounting block (4) is L-shaped; a first screw fixing hole (10) is provided on the mounting block (4), and a second screw fixing hole (11) is provided on the bottom surface of the mounting groove (7). The mounting block (4) is fixedly installed in the mounting groove (7) by screws. A positioning part (13) is also provided on the side of the mounting block (4), and a positioning hole (12) is provided on the frame (1) corresponding to the position of the positioning part (13). The positioning part (13) is positioned and installed in the positioning hole (12).

2. The handcart wheel fixing device according to claim 1, characterized in that: The frame (1) is also equipped with a push handle (2).

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