Single-roller tennis cart

Abstract

The utility model discloses a single roll tennis trolley, including the basket, the trolley placing frame is fixedly connected below the basket, the trolley placing frame bottom is fixedly connected with the trolley chassis, is equipped with the mainboard of fixed connection through screw on the trolley chassis top, one side of mainboard is equipped with the battery of fixed in the trolley chassis, the battery side is equipped with the battery charging mouth, the battery front is equipped with the fixing frame of installation on the trolley chassis, the fixed connection of recovery channel is fixedly connected on the fixing frame, is equipped with the first motor on the trolley chassis, and the drive wheel of drive connection is equipped with in the both ends of first motor, and the recovery mouth of recovery channel is fixed with the polyurethane rubber -coated wheel, and the polyurethane rubber -coated wheel is connected drive by one side's second motor, and the anti -collision rod of fixed connection with trolley chassis is equipped in the polyurethane rubber -coated wheel front, and the anti -collision wheel is equipped in the anti -collision rod top.

Description

Technical Field

[0001] This utility model belongs to the technical field of optimizing sports equipment, and more specifically, it relates to a single-roll tennis cart. Background Technology

[0002] With the widespread acceptance of various modern sports, tennis has become popular among people of all ages. However, there are obvious pain points in the tennis ball retrieval process: manual retrieval is time-consuming and laborious, accounting for 15%-20% of training time; fully automatic robots are efficient, but rely on complex algorithms and high-precision sensors, costing over 10,000 yuan, are difficult to maintain, and have poor adaptability to complex terrains such as grass; semi-automatic integrated machines are large in size and lack flexibility.

[0003] Market demand is highly differentiated. Professional venues favor highly automated equipment, while small and medium-sized clubs and families prioritize affordability and ease of use. Existing equipment is either too expensive or has limited functionality, making it difficult to meet diverse needs. Furthermore, it suffers from bottlenecks in environmental adaptability, cost control, and ease of operation.

[0004] The emergence of remote-controlled pickup carts perfectly balances these contradictions. They enable flexible operation via wireless remote control, simplify sensor configuration to reduce costs, adapt to complex terrain, require no professional training, cost more than 50% less than fully automated equipment, and are suitable for small to medium-sized venues and home settings, providing a new path to improve tennis training efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a remote-controlled tennis cart, aiming to improve upon the traditional method of manually picking up balls, which is not only time-consuming and labor-intensive but also causes some damage to people's lumbar spine health. Therefore, a tennis cart is proposed to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a single-roll tennis ball cart includes a ball basket, a cart placement frame fixedly connected below the ball basket, a cart chassis fixedly connected to the bottom of the cart placement frame, a main board fixedly connected to the top of the cart chassis by screws, a battery fixedly mounted on the cart chassis on one side of the main board, a battery charging port on the side of the battery, a mounting bracket mounted on the cart chassis in front of the battery, a recycling channel fixedly connected to the mounting bracket, a first motor on the cart chassis, drive wheels connected to both ends of the first motor, a polyurethane-coated wheel fixedly mounted at the recycling port of the recycling channel, the polyurethane-coated wheel being driven by a second motor on one side, a crash bar fixedly connected to the cart chassis in front of the polyurethane-coated wheel, and a crash bar with a crash wheel at its top.

[0007] Preferably, the drive wheel is driven by a first motor, which is then controlled by a motherboard.

[0008] Preferably, the bottom of the recycling channel is fixedly connected to a second motor with screws.

[0009] Preferably, the outer side of the trolley placement rack is provided with a fixedly connected protective baffle.

[0010] Preferably, the recycling channel is designed to be inclined to the ground and the angle between the channel and the ground is 45°-60°.

[0011] Preferably, the anti-collision wheel is made of nitrile rubber.

[0012] This utility model provides a single-roll tennis cart, which has the following beneficial effects:

[0013] 1. The anti-slip wheels bring multiple practical benefits to the tennis cart. Their high-elasticity polyurethane coating has a high coefficient of friction, providing stable grip on hard, grass, and even slightly damp surfaces. This prevents the cart from slipping or deviating during rapid turns or when pushing tennis balls, ensuring precise alignment of the channel entrance with the target ball and reducing repetitive alignment operations caused by wheel slippage. Single-ball retrieval efficiency is improved by approximately 15%. Simultaneously, the anti-slip design allows the cart to maintain stable movement on uneven surfaces, reducing the interference of vehicle bumps on the tennis ball retrieval path. Combined with the channel's angled design, this further reduces the risk of ball jamming during transport. Furthermore, the stable grip reduces the motor drive load, minimizing energy consumption and extending battery life by approximately 20 minutes, making it more suitable for continuous operation in long training or teaching scenarios.

[0014] 2. The anti-collision wheels, as an important protective component of the trolley, are mainly installed at the front of the trolley and are made of high-elasticity nitrile rubber, combining wear resistance and cushioning properties. Their core function is to absorb over 70% of the impact force when the trolley accidentally hits obstacles such as fences, net posts, or walls during remote-controlled movement or ball retrieval. This prevents deformation of the main structure (such as the trolley shell and retrieval channel frame) due to collision, while also reducing the impact of vibration on internal circuits (such as sensor wiring and control modules), thus lowering the equipment failure rate. Furthermore, the 3-5mm protrusion of the anti-collision wheels creates a safe gap when the trolley is close to obstacles, preventing the ball retrieval channel entrance from being squeezed and blocked, ensuring the continuity of the tennis ball retrieval process. This is especially beneficial in narrow areas (such as the tennis court sideline area), significantly improving the equipment's operational tolerance and safety.

[0015] 3. The overall portability and remote control capability of the device create a synergistic advantage, significantly enhancing its practical value. The lightweight design keeps the total weight under 5kg, making it easy for a single person to carry and navigate stairs and narrow passages. It can operate flexibly on various surfaces such as grass, plastic, and wood, avoiding the crushing damage caused by traditional heavy equipment. The remote control feature further amplifies the portability advantage: precise control within 50 meters is achieved via a wireless handle. Operators do not need to follow the device and can perform turning, starting, and stopping actions at the edge of the field. Especially during multi-ball training, the device's trajectory can be quickly adjusted to avoid athletes or obstacles, increasing ball retrieval efficiency by more than three times compared to manual tools. Furthermore, remote control lowers the barrier to entry, allowing teenagers and seniors to quickly learn how to use it. Combined with the convenient storage of the lightweight device, it meets both professional training needs and is suitable for small settings such as home yards and community courts. 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 overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the anti-collision bar and anti-collision wheel structure of this utility model.

[0019] In the diagram: 1. Ball basket; 2. Cart placement rack; 3. Cart chassis; 4. Main board; 5. Battery; 6. Battery charging port; 7. Fixing frame; 8. Recycling channel; 9. First motor; 10. Drive wheel; 11. Polyurethane coated wheel; 12. Second motor; 13. Anti-collision bar; 14. Anti-collision wheel. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figures 1 to 3 This utility model provides a technical solution: a single-roller tennis cart, including a ball basket, with a cart placement frame fixedly connected below it. The cart placement frame has baffles around its perimeter to prevent the ball basket from slipping due to impact or rapid movement of the cart. The cart placement frame is fixed to the rear of the cart chassis with screws via an arched iron plate, facilitating retrieval and basket replacement. A main board is fixed to the cart chassis with screws, and a battery is fixed next to the main board. A battery charging port is fixed to the side of the battery, protected by a silicone pad to prevent short circuits caused by water or grass dew. A fixing frame is made in front of the battery, securing the retrieval channel and providing overall stability to the cart, allowing the tennis balls to return to the ball basket via the retrieval channel. On both sides of the fixed frame are drive wheels, each equipped with a first motor to control the two ends. A polyurethane-coated wheel is fixed at the recycling port of the recycling channel to retrieve the tennis ball. The polyurethane-coated wheel is a second drive connected to the motor. When the tennis ball is at the recycling port, it can be retrieved via a remote control. A crash bar is fixed at the front of the chassis of the trolley, and a crash wheel is connected to the top of the crash bar. This can effectively reduce the vibration caused by the impact when encountering obstacles.

[0024] The mainboard, the control core of the tennis cart, adopts a three-layer protective structure: the bottom layer is covered with a nano-waterproof coating to prevent water vapor penetration; the middle layer encapsulates the interface solder joints with a silicone sealing ring to prevent rainwater or dew from entering; and the top layer is equipped with an IP65-rated waterproof shell. As a waterproof design for the mainboard, this design allows the mainboard circuit to operate stably in scenarios such as morning exercise on grass (with dew adhering) and after rain (with splashing water), reducing short-circuit failures caused by moisture.

[0025] The cart is propelled by two drive wheels, the surfaces of which are made of high-density polyurethane composite material. A special textured design enhances friction with the ground, ensuring stable grip on hard surfaces, grass, and even slightly wet surfaces. This prevents slippage when turning or pushing tennis balls, ensuring precise alignment of the ball-collecting channel and reducing repetitive operations. Simultaneously, this material offers excellent shock absorption and cushioning. Combined with the built-in spring damping structure in the wheel core, it reduces vibration amplitude by more than 40%, protecting internal components and maintaining stability during movement.

[0026] The quiet operation significantly optimizes the user experience. The friction noise between the wheels and the ground is kept below 50 decibels, equivalent to the volume of normal conversation. In noise-sensitive environments such as community sports fields and school training grounds, it will not interfere with athletes' communication or the surrounding environment. Furthermore, low-noise operation reduces disruption to training rhythms; coaches can focus on instruction without raising their voices, and athletes can concentrate more on their techniques, indirectly improving training efficiency. This "anti-slip, quiet, and non-disturbing" characteristic makes the vehicle both practical and adaptable to diverse usage environments.

[0027] The vehicle is equipped with a high-performance lithium battery that boasts the dual advantages of "long range and fast charging," perfectly suited for extended outdoor operations. With a battery capacity of 5000mAh and employing low-power discharge management technology, it can maintain 4-5 hours of continuous ball retrieval in continuous mode. This means a single full charge can retrieve approximately 800-1000 tennis balls, meeting the all-day training needs of small to medium-sized courts.

[0028] Charging efficiency is also outstanding, equipped with a 20W fast charging module, which can charge from 0% to full in just 1.5 hours, reducing charging time by 60% compared to traditional lithium batteries. In addition, the battery pack adopts an IP54 dustproof and waterproof design, coupled with overcharge, over-discharge, and short-circuit protection circuits, which can still work stably in outdoor humid environments or accidental collisions, effectively reducing training interruptions caused by insufficient power or waiting for charging, and further improving the practicality and reliability of the equipment.

[0029] As a core passive protection component of the vehicle, the crash wheel exhibits multiple characteristics in terms of material and structure. Its wheel body is made of nitrile rubber with a hardness of 50-60 Shore A, which has both a high elastic deformation capacity of 300% and wear resistance. The surface is covered with anti-slip grooves with a depth of 0.5mm, which not only ensures buffering and energy absorption during collisions, but also avoids abnormal noise caused by friction with the ground.

[0030] In terms of structural design, the anti-collision wheel adopts a combination of "hub + elastic bracket": the 8cm diameter wheel is connected to the vehicle body through a 3mm thick spring steel plate, which can achieve multi-directional deflection of ±15°. When the collision force exceeds 5N, it automatically compresses and buffers, absorbing up to 80% of the impact force. It is installed at the front of the vehicle to prevent the vehicle from colliding with and damaging walls or railings when the vehicle is traveling at high speed, and also to prevent the plastic parts of the vehicle itself from cracking.

[0031] Furthermore, the crash wheels possess excellent environmental adaptability: their operating temperature range of -30℃ to 60℃ allows them to withstand extreme outdoor climates, and the wheel body exhibits 500 hours of UV aging resistance without cracking. This combination of "elastic protection + durable design" enables them to maintain long-term stable performance in frequent collision scenarios.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A single-roll tennis cart, comprising a ball basket (1), characterized in that: A trolley placement frame (2) is fixedly connected below the ball basket (1). A trolley chassis (3) is fixedly connected to the bottom of the trolley placement frame (2). A main board (4) is fixedly connected to the trolley chassis (3) by screws. A battery (5) is fixedly mounted on the trolley chassis (3) on one side of the main board (4). A battery charging port (6) is provided on the side of the battery (5). A mounting bracket (7) is mounted on the trolley chassis (3) in front of the battery (5). A battery is fixedly connected to the mounting bracket (7). The recycling channel (8) is provided with a first motor (9) on the chassis (3) of the trolley. The first motor (9) has drive wheels (10) connected to both ends. A polyurethane-coated wheel (11) is fixed at the recycling port of the recycling channel (8). The polyurethane-coated wheel (11) is connected to and driven by a second motor (12) on one side. A crash bar (13) is fixedly connected to the chassis (3) in front of the polyurethane-coated wheel (11). A crash bar (14) is provided at the top of the crash bar (13).

2. The single-roll tennis cart according to claim 1, characterized in that: The drive wheel (10) is driven by the first motor (9), which is then controlled by the main board (4).

3. A single-roll tennis cart according to claim 1, characterized in that: The bottom of the recycling channel (8) is fixedly connected to the second motor (12) with screws.

4. A single-roll tennis cart according to claim 1, characterized in that: The outer side of the trolley placement rack (2) is provided with a fixed protective baffle.

5. A single-roll tennis cart according to claim 1, characterized in that: The recycling channel (8) is designed to be inclined to the ground and the angle between the channel and the ground is 45°-60°.

6. A single-roll tennis cart according to claim 1, characterized in that: The anti-collision wheel (14) is made of nitrile rubber.

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