Hand-pulling driving vehicle

Abstract

The invention discloses a hand-pulling driving vehicle. The vehicle comprises a vehicle body; a front wheel; a rear wheel; the bicycle further comprises a hand pulling mechanism, the hand pulling mechanism comprises a driving handle, a synchronous belt, a synchronous wheel, an elastic piece and at least one rear shaft, the driving handle is connected to the synchronous wheel through the synchronous belt, the synchronous wheel is connected to the rear wheel through the rear shaft, the driving handle is pulled to drive the synchronous belt to move, and the synchronous wheel and the rear shaft drive the rear wheel to rotate. The other end of the synchronous belt is connected to the vehicle body through an elastic piece, and the elastic piece is used for enabling the driving handle to be automatically retracted when the driving handle is loosened. According to the invention, the driving vehicle can be pulled by hands to advance, and the driving handle can be retracted when no force is applied, so that the fun and safety during driving are improved, and the flexibility of the driving vehicle during use is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of children's vehicle technology, and more particularly to a hand-pulled drive vehicle. Background Technology

[0002] Hand-pulled vehicles, as a type of human-powered recreational or sporty vehicle, have some applications in the children's toy industry. In existing technology, these vehicles mostly use foot pedal drive, hand crank drive, or inertia drive to move forward. For example, some hand-pulled vehicles drive the wheels by having the user repeatedly pull a handle to activate the transmission mechanism.

[0003] However, existing hand-pulled vehicles still have many shortcomings in practical use. First, in most hand-pulled vehicles, the handle does not automatically retract after being released, causing it to wobble during driving and affecting driving safety and ease of operation. Second, traditional hand-pulled vehicles lack an effective differential design when turning, resulting in the rear wheels rotating at the same speed on both sides, which can easily lead to steering instability or even rollover. In addition, the drive belt is prone to shifting or tangling during pulling, affecting power transmission efficiency and service life.

[0004] In terms of vehicle body structure, existing drive vehicles often have a compact layout but are difficult to maintain. Transmission components are exposed and susceptible to dust and moisture corrosion. Steering mechanisms mostly use simple front fork structures, lacking a stable connection with the vehicle body, which can cause swaying during cornering and affect handling precision. In addition, most seats are fixed designs and cannot be adjusted according to the user's height, limiting the range of people who can use them. Summary of the Invention

[0005] The purpose of this invention is to provide a technical solution for a hand-pulled drive vehicle to address the shortcomings of existing technologies. This solution not only allows the vehicle to be driven forward by hand, but also allows the drive handle to be retracted when no force is needed, thus improving driving pleasure and safety, and greatly enhancing the flexibility of the vehicle.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hand-operated vehicle, comprising: Body; Front wheel; rear wheel; Its features are: It also includes a hand-operated mechanism, which includes a drive handle, a timing belt, a timing pulley, an elastic element, and at least one rear axle. The drive handle is connected to the timing pulley via the timing belt, and the timing pulley is connected to the rear wheel via the rear axle. By pulling the drive handle, the timing belt is moved, causing the timing pulley and the rear axle to drive the rear wheel to rotate. The other end of the timing belt is connected to the vehicle body via an elastic element, which is used to automatically retract the drive handle when the drive handle is released.

[0007] The design of the above structure not only allows the vehicle to be driven forward by pulling, but also allows the drive handle to be retracted when no force is needed, improving driving pleasure and safety, and greatly enhancing the flexibility of the vehicle.

[0008] Furthermore, there are two rear axles, each connected to one of the two rear wheels. Each rear axle is equipped with a one-way bearing, and a synchronous pulley is connected to the two one-way bearings. When the vehicle turns, the synchronous pulley drives the two one-way bearings to rotate, forming a differential speed. This can greatly improve the stability and reliability of the vehicle during turning and prevent rollover.

[0009] Furthermore, the hand-operated mechanism also includes two interconnected tape outlet plates with slots. When not in use, the drive handle can be locked in the slots of the tape outlet plates to prevent the drive handle from shaking, facilitate the storage of the drive handle, and avoid shaking when not in use, thus preventing safety hazards.

[0010] Furthermore, the hand-operated mechanism also includes a pulley system, which includes a first pulley located between the two belt outlet plates and a second pulley located inside the vehicle body. The first and second pulleys are used to guide the movement of the synchronous belt. Through the design of the pulley system, the synchronous belt can be ensured to move stably, and the synchronous belt can be prevented from getting tangled during movement, which would affect the power output.

[0011] Furthermore, the elastic element is a spring, which can ensure the stable retraction of the timing belt, thereby realizing the retraction of the drive handle.

[0012] Furthermore, the vehicle body includes a chassis, a seat snap-fit ​​plate, and body panels. Two body panels are detachably connected between the chassis and the seat snap-fit ​​plate. The body panels are provided with a first positioning cavity, a second positioning cavity, a first positioning groove, and a second positioning groove. The first positioning groove and the second positioning groove are located between the first positioning cavity and the second positioning cavity. The second positioning cavity is used to accommodate the synchronous pulley, and the second positioning groove is used to accommodate the elastic element. The synchronous belt passes through the second positioning cavity and then connects to the synchronous pulley via the first positioning groove. The end of the synchronous belt is connected to the elastic element. Through the design of the chassis and body panels, the installation of the hand-operated mechanism and the foot-operated steering mechanism is facilitated. The first positioning cavity, the second positioning cavity, the first positioning groove, and the second positioning groove can protect the synchronous belt, the synchronous pulley, the elastic element, and the pulley block, thereby extending the service life of the drive vehicle.

[0013] Furthermore, a bearing plate is provided on the outer side of the body panel to support the one-way bearing, thereby improving the stability and reliability of power transmission.

[0014] Furthermore, it also includes a foot-operated steering mechanism that is rotatably connected to the chassis and body panels. The foot-operated steering mechanism includes a steering assembly, a front axle vertical shaft, and a front axle. The front axle vertical shaft passes vertically through the steering assembly and is rotatably connected to the shaft holes on the chassis and body panels. The front axle passes horizontally through the steering assembly, and front wheels are provided at both ends of the front axle. The front axle vertical shaft can improve the connection stability between the steering assembly and the chassis and body panels, and ensure that the steering assembly drives the two front wheels to rotate synchronously via the front axle.

[0015] Furthermore, the body panel is provided with a U-shaped groove. The length of the U-shaped groove is greater than the width of the steering component, and the height of the U-shaped groove is greater than the height of the steering component. The design of the U-shaped groove facilitates the steering component to rotate within a set angle range, meeting the requirements for driving the vehicle to turn.

[0016] Furthermore, the steering assembly includes an upper front axle and a lower front axle connected vertically. The lower front axle has a groove, and the front axle is rotatably connected to the groove. The design of the upper and lower front axles facilitates the installation and removal of the front axle.

[0017] Furthermore, both the upper and lower front axle frames are equipped with steering holes, and the front axle vertical shaft matches the steering holes, improving the stability and reliability of the steering assembly during rotation.

[0018] Furthermore, the top and sides of the upper front axle are detachably connected to a steering pedal and a front wheel mudguard, respectively. By stepping on the steering pedal, the steering assembly can be rotated along the chassis and body panels to achieve turning. The front wheel mudguard is used to shield against mud and water.

[0019] Furthermore, it also includes a braking mechanism, which comprises a brake handle, a brake shaft, a brake rod, and a brake lever. The chassis has a through groove through which the brake handle passes and connects to the brake shaft. The brake shaft is connected to the chassis via a brake shaft seat, and the end of the brake shaft is connected to the brake rod via the brake lever. The rear wheel has a rubber ring. By pulling the end of the brake handle, the shaft and brake lever are rotated, causing the brake rod to approach and contact the rubber ring, thereby slowing down the rear wheel. The brake shaft seat improves the stability of the brake shaft and brake handle during rotation, which in turn allows the brake lever to drive the brake rod to rotate stably, improving braking stability.

[0020] Furthermore, it also includes an adjustable seat mechanism connected to the seat fastening plate. The adjustable seat mechanism includes a backrest, a seat panel, a seat adjustment plate, a seat panel base frame, and a seat back panel. Two parallel seat adjustment plates are detachably connected to both sides of the seat fastening plate. The seat panel is detachably connected to the seat adjustment plate via the seat panel base frame. The backrest is detachably connected to the seat panel base frame via the seat back panel. This can meet the usage requirements of users of different heights and improve flexibility.

[0021] Furthermore, it also includes a rear wheel mudguard that is detachably connected to the chassis. A rear mudguard support plate is provided between the rear wheel mudguard and the chassis. The rear wheel mudguard is connected to the rear axle through a bearing. The rear mudguard support plate improves the connection strength and stability between the rear wheel mudguard and the chassis. The rear wheel mudguard can support the rear axle through the bearing, improving the stability when the rear wheel rotates. The rear wheel mudguard can also block mud and water.

[0022] The present invention, by adopting the above-described technical solution, has the following beneficial effects: 1. This invention not only allows the vehicle to be driven forward by pulling, but also allows the drive handle to be retracted when no force is needed, improving driving pleasure and safety, and greatly enhancing the flexibility of the vehicle.

[0023] 2. The design of two one-way bearings and two rear axles allows the synchronous pulley to drive the two one-way bearings to rotate when the vehicle is turning, forming a differential speed. This can greatly improve the stability and reliability of the vehicle during turning and prevent rollover.

[0024] 3. The tape outlet plate is equipped with a slot, which can be locked into the slot when not in use to prevent the drive handle from shaking, facilitate the storage of the drive handle, and avoid safety hazards caused by shaking when not in use.

[0025] 4. The design of the pulley system ensures stable movement of the synchronous belt and prevents it from getting tangled during movement, which would affect the power output.

[0026] 5. The front axle vertical shaft can improve the connection stability between the steering assembly and the chassis and body panels, ensuring that the steering assembly drives the two front wheels to rotate synchronously via the front axle. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a rendering of a hand-pulled drive vehicle according to the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after the adjustable seat mechanism, front wheel, and rear wheel have been removed. Figure 3 This is a schematic diagram of the structure of the present invention after removing the adjustable seat mechanism, front wheel, rear wheel, front wheel mudguard and rear wheel mudguard; Figure 4 This is a schematic diagram showing the connection between the hand-operated mechanism and the vehicle body in this invention; Figure 5 This is a schematic diagram showing the connection between the foot-operated steering mechanism and the vehicle body in this invention; Figure 6 This is a schematic diagram of the foot-operated steering mechanism in this invention; Figure 7This is a schematic diagram of the connection between the front axle and the lower front axle frame in this invention; Figure 8 This is a schematic diagram of the adjustable seat mechanism in this invention.

[0028] In the diagram: 1 - Front wheel; 2-Rear wheel; 201-Rubber ring; 3-Foot-operated steering mechanism; 301-Upper front axle; 302-Steering pedal; 303-Lower front axle; 304-Front axle vertical shaft; 305-Front axle; 306-Steering hole; 307-Groove; 4-Body body; 401-Chassis; 402-Through groove; 403-Rear mudguard support plate; 404-Seat fastening plate; 405-Body panel; 406-U-shaped groove; 407-First positioning cavity; 408-First positioning groove; 409-Second positioning groove; 410-Second positioning cavity; 411-Shaft hole; 412-Decorative panel; 5-Hand-operated mechanism; 501-Drive handle; 502-Pressure plate; 503-Slot; 504-Belt outlet plate; 505-First pulley; 506-Second pulley; 507-Synchronous belt; 508-Elastic element; 509-Bearing plate; 510-Synchronous pulley; 511-One-way bearing; 512-Rear axle; 513-Bearing; 6-Adjustable seat mechanism; 601-Seat adjustment plate; 602-Seat panel base frame; 603-Seat backrest panel; 604-Backrest; 605-Seat panel; 606-Positioning pin; 7-Front wheel mudguards; 8- Rear wheel mudguards; 9-Brake mechanism; 901-Brake handle; 902-Brake shaft seat; 903-Brake shaft; 904-Brake rod; 905-Brake lever. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] like Figures 1 to 8 As shown, this invention provides a hand-pulled vehicle, comprising: a body 4, a front wheel 1, a rear wheel 2, a hand-pulled mechanism 5, a foot-operated steering mechanism 3, a braking mechanism 9, and an adjustable seat mechanism 6.

[0033] The vehicle body 4 includes a chassis 401, a seat fastening plate 404, and body panels 405. Two body panels 405 are detachably connected between the chassis 401 and the seat fastening plate 404. Each body panel 405 has a first positioning cavity 407, a second positioning cavity 410, a first positioning groove 408, and a second positioning groove 409. The first positioning groove 408 and the second positioning groove 409 are located between the first positioning cavity 407 and the second positioning cavity 410. The second positioning cavity 410 is used to accommodate the synchronous pulley 510, and the second positioning groove 409 is used to accommodate the elastic... The timing belt 507 passes through the second positioning cavity 410 and is connected to the timing pulley 510 via the first positioning groove 408. The end of the timing belt 507 is connected to the elastic element 508. The design of the chassis 401 and the body panel 405 facilitates the installation of the hand-operated mechanism 5 and the foot-operated steering mechanism 3. The first positioning cavity 407, the second positioning cavity 410, the first positioning groove 408 and the second positioning groove 409 can protect the timing belt 507, the timing pulley 510, the elastic element 508 and the pulley block, and extend the service life of the drive vehicle.

[0034] The outer side of the body panel 405 is provided with a bearing plate 509 to support the one-way bearing 511 and improve the stability and reliability of power transmission.

[0035] A decorative panel 412 is detachably connected to the front end of the seat snap-fit ​​panel 404.

[0036] The front wheel 1 is connected to the vehicle body 4 via a foot-operated steering mechanism 3.

[0037] The foot-operated steering mechanism 3 is rotatably connected between the chassis 401 and the body panel 405. The foot-operated steering mechanism 3 includes a steering assembly, a front axle shaft 304 and a front axle 305. The front axle shaft 304 vertically passes through the steering assembly and is rotatably connected to the shaft hole 411 on the chassis 401 and the body panel 405. The front axle 305 horizontally passes through the steering assembly. Front wheels 1 are provided at both ends of the front axle 305. The front axle shaft 304 can improve the connection stability between the steering assembly and the chassis 401 and the body panel 405, and ensure that the steering assembly drives the two front wheels 1 to rotate synchronously via the front axle 305.

[0038] The body panel 405 is provided with a U-shaped groove 406. The length of the U-shaped groove 406 is greater than the width of the steering component, and the height of the U-shaped groove 406 is greater than the height of the steering component. The design of the U-shaped groove 406 facilitates the steering component to rotate within a set angle range, meeting the requirements for driving the vehicle to turn.

[0039] The steering assembly includes an upper front axle 301 and a lower front axle 303 connected vertically. The lower front axle 303 is provided with a groove 307, and the front axle 305 is rotatably connected to the groove 307. The design of the upper front axle 301 and the lower front axle 303 facilitates the installation and removal of the front axle 305.

[0040] Both the upper front axle 301 and the lower front axle 303 are provided with steering holes 306, and the front axle vertical shaft 304 is matched with the steering holes 306 to improve the stability and reliability of the steering assembly when it rotates.

[0041] The top and side surfaces of the upper front axle 301 are detachably connected to a steering pedal 302 and a front wheel mudguard 7, respectively. By stepping on the steering pedal 302, the steering assembly can be rotated along the chassis 401 and body panel 405 to achieve turning. The front wheel mudguard 7 is used to shield against mud and water.

[0042] The hand-operated mechanism 5 is connected to the vehicle body 4.

[0043] The hand-operated mechanism 5 includes a drive handle 501, a timing belt 507, a timing pulley 510, an elastic element 508, and at least one rear axle 512. The drive handle 501 is connected to the timing pulley 510 via the timing belt 507. The timing pulley 510 is connected to the rear wheel 2 via the rear axle 512. By pulling the drive handle 501, the timing belt 507 is moved, causing the timing pulley 510 and the rear axle 512 to drive the rear wheel 2 to rotate. The other end of the timing belt 507 is connected to the vehicle body 4 via an elastic element 508, which is used to automatically retract the drive handle 501 when it is released. The drive handle 501 is provided with a pressure plate 502, which can improve the stability of the drive handle 501 when it is placed in the slot 503.

[0044] There are two rear axles 512, which are respectively connected to the two rear wheels 2. Each rear axle 512 is provided with a one-way bearing 511. A synchronous pulley 510 is connected to the two one-way bearings 511, so that when the driving vehicle turns, the synchronous pulley 510 drives the two one-way bearings 511 to rotate, forming a differential speed, which can greatly improve the stability and reliability of the driving vehicle during the turning process and avoid rollover.

[0045] The pull mechanism 5 also includes two interconnected tape outlet clamping plates 504. The tape outlet clamping plates 504 are detachably connected to the seat fastening plate 404. The tape outlet clamping plates 504 are provided with slots 503. When not in use, the drive handle 501 can be locked in the slots 503 of the tape outlet clamping plates 504 to prevent the drive handle 501 from shaking, facilitate the storage of the drive handle 501, and avoid shaking when not in use, which could cause safety hazards.

[0046] The hand-operated mechanism 5 also includes a pulley system, which includes a first pulley 505 located between two belt outlet clamps 504 and a second pulley 506 located inside the vehicle body 4. The first pulley 505 and the second pulley 506 are used to guide the movement of the synchronous belt 507. Through the design of the pulley system, the synchronous belt 507 can be ensured to move stably, and the synchronous belt 507 can be prevented from getting tangled during movement, which would affect the power output.

[0047] The elastic element 508 is a spring, which can ensure the stable retraction of the timing belt 507, thereby realizing the retraction of the drive handle 501.

[0048] The design of the above structure not only allows the vehicle to be driven forward by pulling, but also allows the drive handle 501 to be retracted when no force is needed, improving driving pleasure and safety, and greatly enhancing the flexibility of the vehicle.

[0049] The braking mechanism 9 is connected to the chassis 401. The braking mechanism 9 includes a brake handle 901, a brake shaft 903, a brake rod 904, and a brake lever 905. The chassis 401 has a through groove 402. The brake handle 901 passes through the through groove 402 and is connected to the brake shaft 903. The brake shaft 903 is connected to the chassis 401 through a brake shaft seat 902. The end of the brake shaft 903 is connected to the brake rod 904 through the brake lever 905. The rear wheel 2 is equipped with a rubber ring 201. By pulling the end of the brake handle 901, the shaft and the brake lever 905 are rotated, causing the brake rod 904 to approach and contact the rubber ring 201, thereby reducing the speed of the rear wheel 2. The brake shaft seat 902 improves the stability of the brake shaft 903 and the brake handle 901 when rotating, and the brake lever 905 can drive the brake rod 904 to rotate stably, thus improving the stability during braking.

[0050] The adjustable seat mechanism 6 is connected to the seat fastening plate 404. The adjustable seat mechanism 6 includes a backrest 604, a seat panel 605, a seat adjustment plate 601, a seat panel base frame 602, and a seat backrest plate 603. Two parallel seat adjustment plates 601 are detachably connected to both sides of the seat fastening plate 404. The seat panel 605 is detachably connected to the seat adjustment plate 601 via the seat panel base frame 602. The backrest 604 is detachably connected to the seat panel base frame 602 via the seat backrest plate 603. This mechanism can meet the usage requirements of users of different heights and improve flexibility.

[0051] The rear wheel mudguard 8 is detachably connected to the chassis 401. A rear mudguard support plate 403 is provided between the rear wheel mudguard 8 and the chassis 401. The rear wheel mudguard 8 is connected to the rear axle 512 through a bearing 513. The rear mudguard support plate 403 improves the connection strength and stability between the rear wheel mudguard 8 and the chassis 401. The rear wheel mudguard 8 can support the rear axle 512 through the bearing 513, improving the stability of the rear wheel 2 when rotating. The rear wheel mudguard 8 can block mud and water.

[0052] In practical use, the adjustable seat mechanism 6 is first adjusted according to the user's height along the seat buckle plate 404. After the user sits on the adjustable seat mechanism 6, the brake handle is pushed down to disengage the brake mechanism 9 from the rear wheel 2. The user then places both feet on the direction foot pedal 302 of the foot pedal steering mechanism 3. Next, the user pulls the drive handle 501 out of the slot 503 of the tape outlet plate 504 and pulls the drive handle 501 upward or to one side of the body to move the synchronous belt 507 and drive the synchronous pulley 510 to rotate. This, in turn, drives the rear wheel 2 to rotate through the rear axle 512, thus driving the vehicle to move. After the drive handle 501 moves a certain distance, it is released and retracted to the tape outlet plate 504 under the action of the spring. The drive handle 501 is then pulled back, and this process is repeated to achieve continuous movement of the vehicle.

[0053] When steering is required, the front wheels 1 can be steered by pressing the steering pedal 302.

[0054] When it is necessary to slow down or stop, by pulling the brake handle 901, the brake rod 904 is brought close to and in contact with the rubber ring 201 of the rear wheel 2, thereby slowing down the rear wheel 2 until it stops.

[0055] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to achieve substantially the same technical effect are all covered within the protection scope of the present invention.

Claims

1. A hand-operated vehicle, comprising: Body; Front wheel; rear wheel; Its features are: It also includes a hand-operated mechanism, which includes a drive handle, a timing belt, a timing pulley, an elastic element, and at least one rear axle. The drive handle is connected to the timing pulley via the timing belt, and the timing pulley is connected to the rear wheel via the rear axle. By pulling the drive handle, the timing belt is moved, causing the timing pulley and the rear axle to drive the rear wheel to rotate. The other end of the timing belt is connected to the vehicle body via the elastic element, which is used to automatically retract the drive handle when the drive handle is released.

2. A hand-operated vehicle according to claim 1, characterized in that: There are two rear axles, each connected to one of the two rear wheels. Each rear axle is equipped with a one-way bearing. The synchronous pulley is connected to the two one-way bearings, so that when the drive vehicle turns, the synchronous pulley drives the two one-way bearings to rotate, forming a differential speed.

3. A hand-operated vehicle according to claim 1, characterized in that: The hand-operated mechanism also includes two interconnected tape outlet plates. The tape outlet plates are provided with slots, and the drive handle can be locked in the slots of the tape outlet plates when not in use to prevent the drive handle from shaking.

4. A hand-operated vehicle according to claim 3, characterized in that: The hand-operated mechanism also includes a pulley system, which includes a first pulley disposed between the two belt outlet plates and a second pulley disposed inside the vehicle body. The first pulley and the second pulley are used to guide the movement of the timing belt.

5. A hand-operated vehicle according to claim 1, characterized in that: The elastic element is a spring.

6. A hand-operated vehicle according to claim 2, characterized in that: The vehicle body includes a chassis, a seat fastening plate, and body panels. Two body panels are detachably connected between the chassis and the seat fastening plate. Each body panel is provided with a first positioning cavity, a second positioning cavity, a first positioning groove, and a second positioning groove. The first positioning groove and the second positioning groove are located between the first positioning cavity and the second positioning cavity. The second positioning cavity is used to accommodate the timing pulley, and the second positioning groove is used to accommodate the elastic element. The timing belt passes through the second positioning cavity and then connects to the timing pulley via the first positioning groove. The end of the timing belt is connected to the elastic element.

7. A hand-operated vehicle according to claim 6, characterized in that: The outer side of the vehicle body panel is provided with a bearing plate for supporting the one-way bearing.

8. A hand-operated vehicle according to claim 6, characterized in that: It also includes a foot-operated steering mechanism that is rotatably connected to the chassis and the body panel. The foot-operated steering mechanism includes a steering assembly, a front axle vertical shaft and a front axle. The front axle vertical shaft passes vertically through the steering assembly and is rotatably connected to the shaft hole on the chassis and the body panel. The front axle passes horizontally through the steering assembly, and the front wheels are provided at both ends of the front axle.

9. A hand-operated vehicle according to claim 8, characterized in that: The vehicle body panel is provided with a U-shaped groove, the length of which is greater than the width of the steering assembly, and the height of which is greater than the height of the steering assembly.

10. A hand-operated vehicle according to claim 8, characterized in that: The steering assembly includes an upper front axle and a lower front axle connected vertically, the lower front axle having a groove, and the front axle being rotatably connected to the groove.

11. A hand-operated vehicle according to claim 10, characterized in that: Both the upper front axle and the lower front axle are provided with steering holes, and the front axle vertical shaft is matched with the steering holes.

12. A hand-operated vehicle according to claim 10, characterized in that: The top and side surfaces of the upper front axle are detachably connected to a steering foot pedal and a front wheel mudguard, respectively.

13. A hand-operated vehicle according to claim 6, characterized in that: It also includes a braking mechanism, which includes a brake handle, a brake shaft, a brake rod, and a brake lever. The chassis has a through groove, through which the brake handle passes and is connected to the brake shaft. The brake shaft is connected to the chassis via a brake shaft seat, and the end of the brake shaft is connected to the brake rod via the brake lever. The rear wheel has a rubber ring. By pulling the end of the brake handle, the shaft and the brake lever are rotated, causing the brake rod to approach and contact the rubber ring, thereby decelerating the rear wheel.

14. A hand-operated vehicle according to claim 6, characterized in that: It also includes an adjustable seat mechanism connected to the seat fastening plate. The adjustable seat mechanism includes a backrest, a seat panel, a seat adjustment plate, a seat panel base frame, and a seat backrest plate. Two parallel seat adjustment plates are detachably connected to both sides of the seat fastening plate. The seat panel is detachably connected to the seat adjustment plate via the seat panel base frame. The backrest is detachably connected to the seat panel base frame via the seat backrest plate.

15. A hand-operated vehicle according to claim 6, characterized in that: It also includes a rear wheel mudguard that is detachably connected to the chassis, a rear mudguard support plate is provided between the rear wheel mudguard and the chassis, and the rear wheel mudguard is connected to the rear axle through a bearing.

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