A cargo truck with easy steering

Abstract

This utility model provides a cargo truck with easy steering, including a cargo truck floor. A push frame and casters are fixedly installed on the cargo truck floor. A steering seat, a correcting gear, and a steering drive gear are rotatably installed under the cargo truck floor. The correcting gear meshes with the steering gear and steering drive gear installed on the steering seat. A steering wheel is fixedly installed under the steering seat. One end of the drive arm is fixedly connected to the lower part of the shaft of the steering drive gear, and the drive arm is slidably connected to a guide rail installed under the cargo truck floor. The other end is fixedly connected to the lower end of the drive arm, and a handle is fixedly installed on the upper end of the drive arm. This utility model reduces steering effort and labor intensity through a unique gear transmission structure and reasonable transmission ratio. The rounded triangular floor combined with casters and steering wheels enables flexible steering and improves the safety of warehousing operations. The steering mechanism is compact, with a simple mechanical structure, easy maintenance, and combines economy and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of cargo vehicle steering technology, and particularly relates to a cargo vehicle with easy steering. Background Technology

[0002] In the logistics and warehousing sector, warehouse trucks, as crucial handling tools, directly impact work efficiency and ease of operation with their steering performance. Traditional warehouse trucks suffer from numerous shortcomings in steering functionality, hindering easy maneuverability. On one hand, many warehouse trucks employ simple mechanical steering structures, such as the common tie-rod design. Steering requires operators to exert considerable force to overcome the friction between the wheels and the ground, as well as the inherent resistance of the steering mechanism itself. When the warehouse truck is fully loaded, its weight increases significantly, making steering extremely strenuous. This not only consumes a great deal of the operator's physical strength but also increases the risk of collisions and other safety accidents due to delayed steering.

[0003] On the other hand, while some cargo trucks are equipped with power steering systems, such as hydraulic power steering, these systems have significant drawbacks. Hydraulic power steering systems rely on complex hydraulic lines and pumps, which not only increase the overall weight and cost of the cargo truck, but also make the hydraulic oil prone to leakage, leading to reduced or even failed power steering performance, and also causing environmental pollution.

[0004] Therefore, it is essential to invent a cargo vehicle with easy steering. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a cargo truck with easy steering, including a cargo truck floor, a push frame, casters, a steering seat, a correcting gear, a steering drive gear, a steering gear, a steering wheel, a drive arm, a guide rail, a steering arm, and a handle. The lower end of the push frame is fixedly installed on one side above the cargo truck floor, and a caster is fixedly installed below it. The steering seat, the correcting gear, and the steering drive gear are rotatably installed below the cargo truck floor. The correcting gear meshes with the steering gear and the steering drive gear installed on the steering seat. A steering wheel is fixedly installed below the steering seat. One end of the drive arm is fixedly connected to the lower part of the shaft of the steering drive gear. The drive arm is slidably connected to the guide rail installed below the cargo truck floor, and its other end is fixedly connected to the lower end of the drive arm. A handle is fixedly installed on the upper end of the drive arm.

[0006] Preferably, the cargo truck floor is a rounded triangular structure, and omnidirectional wheels are fixedly installed at the two bottom corners of the cargo truck floor, with the top of the bottom corners fixedly connected to the bottom of the push frame.

[0007] Preferably, a steering seat is rotatably mounted below the top corner of the cargo truck floor, and a steering wheel fixedly mounted below the steering seat is located below the steering gear mounted on it, with the three arranged coaxially.

[0008] Preferably, the steering gear, the correcting gear, and the steering drive gear are arranged on the same horizontal line, and the correcting gear is installed between the steering gear and the steering drive gear.

[0009] Preferably, the diameter of the correcting gear is smaller than the diameter of the steering gear and the steering drive gear, and the diameter of the steering drive gear is larger than the diameter of the steering gear.

[0010] Preferably, the drive arm, which is fixedly mounted at the lower end of the central shaft of the steering drive gear, is located between the two universal wheels, and the drive arm is slidably connected to the arc-shaped guide rail below the cargo truck floor.

[0011] Preferably, one end of the drive arm is fixedly connected to the lower end of the inclined steering arm, the handle fixedly installed on the upper end of the steering arm is in a horizontal state, and the steering arm is arranged around one side of the push frame.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention utilizes a unique gear transmission structure—the meshing of a steering gear, a corrective gear, and a steering drive gear—and a rationally designed transmission ratio, particularly the larger diameter steering drive gear, to effectively reduce the force required for the operator to push the handle. Compared to traditional mechanically steering cargo trucks, this significantly reduces steering effort, greatly alleviating the operator's workload. Even when the cargo truck is fully loaded, steering can be easily achieved, improving work efficiency.

[0014] This utility model's cargo truck floor adopts a rounded triangular structure, combined with omnidirectional wheels at the two bottom corners and a steering wheel at the top corner, forming a flexible movement and steering layout. During steering, the omnidirectional wheels can roll freely, reducing lateral resistance, while the steering wheels are controlled by a precise gear transmission system. This allows the cargo truck to steer flexibly in narrow storage spaces, effectively avoiding collisions with shelves caused by inflexible steering, and improving the safety of warehousing operations.

[0015] In this invention, the steering gear, corrective gear, and steering drive gear are arranged on the same horizontal line, with the corrective gear located in the middle. This layout makes the entire steering mechanism compact, occupies little space, and is easy to install and arrange within the limited space under the cargo truck. At the same time, the mechanical structure is relatively simple. During routine maintenance, operators can visually inspect the meshing of each gear and the sliding state of the drive arm and guide rail. Repairing and replacing parts is also convenient, reducing maintenance costs and downtime, and improving the economy and reliability of the cargo truck. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the bottom structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model.

[0019] In the picture:

[0020] 1. Cargo truck floor; 2. Handrail; 3. Casters; 4. Steering seat; 5. Correcting gear; 6. Steering drive gear; 7. Steering gear; 8. Steering wheel; 9. Drive arm; 10. Guide rail; 11. Steering arm; 12. Handle. 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 3 As shown:

[0024] This utility model provides a cargo truck with easy steering, including a cargo truck floor 1, a push frame 2, casters 3, a steering seat 4, a correcting gear 5, a steering drive gear 6, a steering gear 7, a steering wheel 8, a drive arm 9, a guide rail 10, a steering arm 11, and a handle 12. The lower end of the push frame 2 is fixedly installed on one side above the cargo truck floor 1, and the casters 3 are fixedly installed below it. The steering seat 4, the correcting gear 5, and the steering drive gear 6 are rotatably installed below the cargo truck floor 1. The correcting gear 5 is meshed with the steering gear 7 and the steering drive gear 6 installed on the steering seat 4, respectively. The steering wheel 8 is fixedly installed below the steering seat 4. One end of the drive arm 9 is fixedly connected to the lower part of the shaft of the steering drive gear 6. The drive arm 9 is slidably connected to the guide rail 10 installed below the cargo truck floor 1, and its other end is fixedly connected to the lower end of the drive arm 9. The upper end of the drive arm 9 is fixedly installed with a handle 12.

[0025] Furthermore, the cargo truck floor 1 is made entirely of high-strength aluminum alloy and designed with a rounded triangular structure. This structure not only reduces collision damage during handling but also allows for more flexible turning in narrow passages. At the two bottom corners of the cargo truck floor 1, casters 3 are bolted in place. These casters 3 are made of polyurethane and use high-precision ball bearings to reduce rolling resistance and noise. The upper parts of the two bottom corners are welded to the lower part of the push frame 2. The push frame 2 is made of carbon steel with a rust-proof surface treatment, and its height is ergonomically designed for easy pushing of the cargo truck by operators.

[0026] Furthermore, a steering seat 4 is rotatably mounted below the top corner of the cargo truck floor 1 via a deep groove ball bearing. The steering seat 4 is made of cast steel to ensure sufficient strength and stability. Below the steering seat 4, a steering wheel 8 is fixedly mounted via a key connection. The steering wheel 8 is also made of polyurethane, providing good wear resistance and grip. A steering gear 7 is coaxially mounted on the steering seat 4 and the steering wheel 8. All three are connected by the same high-strength alloy steel shaft, ensuring precise and stable force transmission during steering.

[0027] Furthermore, the steering gear 7, correcting gear 5, and steering drive gear 6 are all made of 45# steel and hardened to enhance tooth surface hardness and wear resistance. The three gears are positioned on the same horizontal line, with the correcting gear 5 installed between the steering gear 7 and steering drive gear 6, and all pairs of gears precisely meshing with each other using standard involute tooth profiles. The center distance between the gears is ensured through high-precision machining processes, guaranteeing smooth and seamless transmission. Regular lubrication with grease reduces gear wear.

[0028] Furthermore, the diameter of the correcting gear 5 is smaller than that of the steering gear 7 and the steering drive gear 6, while the diameter of the steering drive gear 6 is larger than that of the steering gear 7. This diameter design creates a reasonable transmission ratio. When the steering drive gear 6 is driven, the smaller-diameter correcting gear 5 can efficiently transmit power to the steering gear 7, enabling the steering wheel 8 to rotate flexibly. During steering, the large-diameter design of the steering drive gear 6 effectively reduces the force required by the operator, while the correcting gear 5 plays a role in transitioning and correcting steering angle deviations, ensuring precise steering.

[0029] Furthermore, a drive arm 9 is fixedly mounted on the lower end of the central shaft of the steering drive gear 6 via a flat key. The drive arm 9 is made of carbon steel with a U-shaped cross-section, possessing high bending strength. The drive arm 9 is located between the two casters 3 and is slidably connected to the arc-shaped guide rail 10 below the cargo truck floor 1. The arc-shaped guide rail 10 is made of stainless steel with a polished surface. Wear-resistant polytetrafluoroethylene sliders are installed at the contact points between the drive arm 9 and the guide rail 10 to reduce sliding friction and ensure that the drive arm 9 can slide smoothly on the guide rail 10, thereby driving the steering drive gear 6 to rotate smoothly.

[0030] Furthermore, one end of the drive arm 9 is hinged to the lower end of the inclined steering arm 11 via a pin. The steering arm 11 is made of aluminum alloy, which is lightweight and high-strength. A horizontal handle 12 is fixedly installed on the upper end of the steering arm 11. The surface of the handle 12 is covered with a non-slip rubber sleeve to improve the operator's grip comfort and stability. The tilt angle of the steering arm 11 has been optimized so that the operator's arm is at a natural and comfortable force application angle when pushing the handle 12, further reducing operator fatigue. The steering arm 11 is also arranged around one side of the push frame 2, which is a reasonable layout that facilitates the operator's steering operation from different directions.

[0031] The working principle is as follows: First, when the operator grips the handle 12 and applies a pushing force, the force is transmitted to the inclined steering arm 11. Since the lower end of the steering arm 11 is hinged to the drive arm 9 via a pin, this force causes the drive arm 9 to slide along the arc-shaped guide rail 10 below the cargo truck floor 1. Next, the drive arm 9 is fixedly connected to the central shaft of the steering drive gear 6 via a flat key, and the sliding drive arm 9 causes the steering drive gear 6 to rotate around the shaft. Subsequently, the steering drive gear 6 meshes with the correcting gear 5, and the rotation of the steering drive gear 6 drives the correcting gear 5 to rotate. Then... The correcting gear 5 then transmits power to the steering gear 7, which meshes with it. Since the steering gear 7 is coaxially set with the steering wheel 8 on the steering seat 4, the rotation of the steering gear 7 drives the steering wheel 8 to change direction. At the same time, the universal wheels 3 at the two bottom corners of the cargo truck floor 1 can rotate freely, and in conjunction with the direction adjustment of the steering wheel 8, the cargo truck can be flexibly turned. In addition, the diameter of the steering drive gear 6 is larger than that of the steering gear 7 and the correcting gear 5, forming a force-saving transmission ratio. The correcting gear 5 can also correct the steering angle deviation, ensuring steering accuracy, and ultimately achieving easy steering operation of the cargo truck.

[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 cargo vehicle with easy steering, characterized in that, The cargo truck includes a floor (1), a handrail (2), casters (3), a steering seat (4), a straightening gear (5), a steering drive gear (6), a steering gear (7), a steering wheel (8), a drive arm (9), a guide rail (10), a steering arm (11), and a handle (12). The lower end of the handrail (2) is fixedly installed on one side above the cargo truck floor (1), and casters (3) are fixedly installed below it. The steering seat (4), the straightening gear (5), and the steering drive gear (8) are rotatably installed below the cargo truck floor (1). The moving gear (6) and the correcting gear (5) are respectively meshed with the steering gear (7) and the steering drive gear (6) installed on the steering seat (4), wherein a steering wheel (8) is fixedly installed below the steering seat (4); one end of the drive arm (9) is fixedly connected to the lower part of the shaft of the steering drive gear (6), the drive arm (9) is slidably connected to the guide rail (10) installed below the cargo truck floor (1), and the other end is fixedly connected to the lower end of the drive arm (9), and a handle (12) is fixedly installed on the upper end of the drive arm (9).

2. A cargo vehicle with easy steering as described in claim 1, characterized in that: The cargo truck floor (1) is a rounded triangular structure. Two casters (3) are fixedly installed at the bottom corners of the cargo truck floor (1), and the bottom corners are fixedly connected to the bottom of the push frame (2).

3. A cargo vehicle with easy steering as described in claim 2, characterized in that: A steering seat (4) is rotatably installed below the top corner of the cargo truck floor (1). A steering wheel (8) is fixedly installed below the steering seat (4) and is located below the steering gear (7) installed on itself. The three are coaxially arranged.

4. A cargo vehicle with easy steering as described in claim 3, characterized in that: The steering gear (7), the correcting gear (5) and the steering drive gear (6) are arranged on the same horizontal line, and the correcting gear (5) is installed between the steering gear (7) and the steering drive gear (6).

5. A cargo vehicle with easy steering as described in claim 4, characterized in that: The diameter of the correcting gear (5) is smaller than the diameter of the steering gear (7) and the steering drive gear (6), and the diameter of the steering drive gear (6) is larger than the diameter of the steering gear (7).

6. A cargo vehicle with easy steering as described in claim 5, characterized in that: The drive arm (9) fixedly installed at the lower end of the central shaft of the steering drive gear (6) is located between the two universal wheels (3), and the drive arm (9) is slidably connected to the arc-shaped guide rail (10) below the cargo truck floor (1).

7. A cargo vehicle with easy steering as described in claim 6, characterized in that: One end of the drive arm (9) is fixedly connected to the lower end of the inclined steering arm (11), and the handle (12) fixedly installed on the upper end of the steering arm (11) is in a horizontal state. The steering arm (11) is located on one side of the push frame (2).

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