Three-wheel folding truck

Abstract

The utility model discloses a three-wheel folding truck, which is characterized in that an underframe of a container of the truck is divided into three parts, namely a fixed frame positioned in the middle and movable frames positioned on two sides; the two rear wheels are respectively connected below the two movable frames; the left and right swing beam assemblies are respectively arranged on the left and right sides of the fixed frame; the two ends of each swing beam are hinged to the movable frame and the fixed frame respectively. The movable frame and the fixed frame are fixed through at least one pair of pin plates; a bottom plate of the container is divided into five parts, namely a first part which is fixedly connected to the fixed frame, and a second part and a third part which are fixed to the two movable frames; the fourth part and the fifth part each comprise two movable plates capable of being folded, and the movable plates are located above the two swing beam assemblies respectively. The cargo tank is divided into three parts, the middle part is fixed, and the two sides are movable, so that the cargo tank can be folded, the width of the vehicle is reduced after the cargo tank is folded, the occupied space is reduced, the cargo tank can be unfolded during running, the rear wheel track is enlarged along with the unfolding of the cargo tank, the stability of the vehicle is ensured, and more cargoes can be loaded; and the adaptability of the three-wheel truck is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-wheel vehicles and relates to a three-wheel folding truck. Background Art

[0002] The three-wheel vehicle is divided into two parts, the front and the rear. There is a steerable wheel at the front, and the two rear wheels are mainly used to carry the cargo box. The width of the cargo box determines the width of the whole vehicle. The wheelbase of the existing three-wheel trucks is usually fixed, and the width of the cargo box is also fixed. When driving, the wide cargo box is conducive to loading more goods. However, when the vehicle is stored empty, the wide cargo box occupies more space and is not convenient for storage; especially for the three-wheel trucks used in RVs, the space in the RV carriage is limited, and it is difficult to store the three-wheel trucks with a fixed width. Content of the Utility Model

[0003] In order to overcome the deficiencies in the background art, the utility model provides a three-wheel folding truck, aiming to divide the cargo box of the three-wheel truck into three parts, the middle part is fixed, and the two sides are movable, so that the cargo box can be folded, the vehicle width is reduced after folding, and the space occupation is reduced. When driving, the cargo box can be unfolded, and the wheelbase of the two rear wheels expands with the unfolding of the cargo box to ensure the stability of the vehicle, thereby improving the adaptability of the three-wheel truck.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A three - wheel folding freight car, including a freight car with one front wheel and two rear wheels, the cargo box of the freight car is connected above the two rear wheels; the chassis of the cargo box is divided into three parts, namely a fixed chassis fixedly connected to the vehicle body in the middle and movable chassis on the left and right sides of the fixed chassis; the two rear wheels are respectively connected below the two movable chassis; two groups of swing beam assemblies are respectively arranged on the left and right sides of the fixed chassis; each group of swing beam assemblies includes a plurality of swing beams arranged in parallel, and both ends of each swing beam are respectively hinged to the movable chassis and the fixed chassis, for the two movable chassis to be folded together or unfolded; it also includes at least a pair of long pin plates and at least a pair of short pin plates; the long pin plates are used for when the movable chassis is unfolded, the pins fixedly connected to both ends of the long pin plates are respectively inserted into the pin holes on the fixed chassis and the swing beam, so as to fix the movable chassis; the short pin plates are used for when the movable chassis is folded together, the pins fixedly connected to both ends of the short pin plates are respectively inserted into the pin holes on the fixed chassis and the swing beam, so as to fix the movable chassis; the bottom plate of the cargo box is divided into five parts, namely the first part fixedly connected to the fixed chassis, the second and third parts fixed on the two movable chassis; the fourth and fifth parts both include two movable plates, and are respectively located above the two groups of swing beam assemblies, for when the movable chassis is unfolded, the two movable plates are placed side by side lying on the swing beam as the bottom plate, and for when the movable chassis is folded together, the two movable plates are folded and erected above the swing beam as side baffles.

[0006] As a further optimization, there are multiple pairs of long pin plates and short pin plates, and each swing beam corresponds to one long pin plate and one short pin plate.

[0007] As a further optimization, the one front wheel is a follower wheel for steering; the two rear wheels are both driving wheels.

[0008] As a further optimization, several jacks are provided on the movable plate, and the upper end of the hinge shaft of the swing beam extends above the swing beam, for when the two movable plates are placed lying on the swing beam, the upper end of the hinge shaft is inserted into the jacks to fix the movable plate.

[0009] As a further optimization, the lower end of the hinge shaft is provided with a threaded head, and the threaded head is connected with a nut, for the hinge shaft to be detachable.

[0010] As a further optimization, the front and rear ends of the movable plate are bent to form erected parts, for when the two movable plates are placed lying on the swing beam, the erected parts at the front and rear ends block the front and rear ends of the cargo box as front and rear baffles.

[0011] The beneficial effects of the present utility model are as follows: The cargo box of the present utility model is divided into three parts. The middle part is fixed, and the two sides are movable, so that the cargo box can be folded. After folding, the vehicle width is reduced, and the space occupation is reduced. When driving, the cargo box can be unfolded, and the rear wheelbase is expanded with the unfolding of the cargo box, ensuring the stability of the vehicle and loading more goods, thereby improving the adaptability of the three-wheel truck. Brief Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the external structure of the folded embodiment of the present utility model;

[0013] Figure 2 It is a schematic diagram of the external structure of the unfolded embodiment of the present utility model;

[0014] Figure 3 It is a schematic diagram of the frame structure of the embodiment of the present utility model after removing the cargo box bottom plate;

[0015] Figure 4 It is a partial schematic diagram of the installation of the long pin plate of the embodiment of the present utility model;

[0016] Figure 5 It is a partial schematic diagram of the installation of the short pin plate of the embodiment of the present utility model;

[0017] Figure 6 It is a schematic cross-sectional structure diagram at the swing beam of the unfolded embodiment of the present utility model.

[0018] The corresponding relationship between the technical features and the reference numerals in the figure is: fixed frame 1; movable frame 2; swing beam 3; hinge shaft 31; nut 32; long pin plate 4; short pin plate 41; pin hole 42; first part bottom plate 5; second part bottom plate 51; third part bottom plate 52; fourth part bottom plate 53; fifth part bottom plate 54; movable plate 61; jack hole 62; erected part 63. Specific Embodiment

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0020] Embodiment 1, please refer to Figure 1-6, the present utility model provides a three - wheel folding truck, which is applied to a small truck carried by a motorhome. After folding, it can be placed in the motorhome, and after unfolding, it can transport goods to supplement supplies for the stationed motorhome. The truck includes one front wheel and two rear wheels. The cargo box of the truck is connected above the two rear wheels. The underframe of the cargo box is divided into three parts, namely a fixed frame 1 fixedly connected to the vehicle body in the middle and movable frames 2 on the left and right sides of the fixed frame 1. The two rear wheels are respectively connected below the two movable frames 2. Left and right groups of swing beam assemblies are respectively arranged on the left and right sides of the fixed frame 1. Each group of swing beam assemblies includes a plurality of swing beams 3 arranged in parallel. The two ends of each swing beam 3 are respectively hinged to the movable frame 2 and the fixed frame 1, so that the two movable frames 2 can be folded or unfolded. It also includes at least a pair of long pin plates 4 and at least a pair of short pin plates 41. When the movable frame 2 is unfolded, the pins fixedly connected to the two ends of the long pin plate 4 are respectively inserted into the pin holes 42 on the fixed frame 1 and the swing beam 3 to fix the movable frame 2. When the movable frame 2 is folded, the pins fixedly connected to the two ends of the short pin plate 41 are respectively inserted into the pin holes 42 on the fixed frame 1 and the swing beam 3 to fix the movable frame 2. The bottom plate of the cargo box is divided into five parts, namely a first - part bottom plate 5 fixedly connected to the fixed frame 1, second - and third - part bottom plates 51, 52 fixed on the two movable frames 2. The fourth and fifth - part bottom plates 53, 54 each include two movable plates 61 and are respectively located above the two groups of swing beam assemblies. When the movable frame 2 is unfolded, the two movable plates 61 are placed side - by - side lying on the swing beam 3 as the bottom plate, and when the movable frame 2 is folded, the two movable plates 61 are placed upright on the swing beam 3 as side baffle plates.

[0021] During use, the two rear wheels primarily bear the weight of the cargo box, while the front wheel serves as a steering wheel. For example, if the truck is an electric vehicle, the drive wheels can be either the two rear wheels or the single front wheel. In this embodiment, the front wheels are preferably steering wheels, while the two rear wheels are drive wheels. Circuitry controls the rotation of the drive wheels to facilitate steering. The two rear wheels can be controlled independently. During straight-line travel, both drive wheels operate simultaneously. When turning left, the left wheel automatically loses power. This automatic power-off function refers to the electronic differential control switch, which is mounted on the front axle's fixed sleeve. The two limit switches' mounting bases provide a mechanical speed limiter. When turning right, the right wheel automatically loses power and becomes a follower wheel, facilitating cornering. The swing beams 3 on either side allow the vehicle's frames to be deployed or folded. The long pin plate 4 and short pin plate 41 are movable components and are carried on board, serving as locking elements. The folded frame is secured with the short pin plate 41, while the expanded frame is secured with the long pin plate 4. Because the multiple swing beams 3 are arranged in parallel and of equal length, forming a linkage mechanism, securing one swing beam 3 also secures the remaining swing beams 3. Therefore, at least one long pin plate 4 and short pin plate 41 are required on each side of the fixed frame 1. To accommodate the mobility of the movable frame 2, the cargo box's floor is split. The fourth and fifth sections are movable, each consisting of two movable panels 61. When the movable frame 2 is unfolded, the two movable panels 61 on each side line up to fill the gap above the swing beams 3 and dock with the fixed floor, forming a complete cargo box floor for loading cargo. When the movable frame 2 is unfolded, the two movable panels 61 stand upright and rest above the swing beams 3 as side panels. The cargo box is now divided into three sections: a center cargo box on the fixed frame 1 and side cargo boxes on either side of the center cargo box. The folded truck can be placed in a motorhome and can also be driven. This allows for flexible width adjustments based on road conditions, making it more convenient and versatile.

[0022] In order to further improve the stability of the movable frame 2, the long pin plates 4 and the short pin plates 41 are multiple pairs, and each swing beam 3 corresponds to one long pin plate 4 and short pin plate 41. It can be seen that each swing beam 3 can be fixed, and the stability of the movable frame 2 is further improved.

[0023] In order to make the fixing of the movable plate 61 on the swing beam 3 more stable, a number of jacks 62 are provided on the movable plate 61. The upper end of the hinge shaft 31 of the swing beam 3 extends above the swing beam 3 and is used for inserting the upper end of the hinge shaft 31 into the jack 62 to fix the movable plate 61 when two movable plates 61 are laid down on the swing beam 3. It can be seen that by using the hinge shaft 31 as a fixing member to limit the movable plate 61, the bottom plate of the cargo box after unfolding is more stable and more reliable to use. The lower end of the hinge shaft 31 is provided with a threaded head, and the threaded head is connected with a nut 32 for the hinge shaft to be detachable, so as to facilitate maintenance and replacement.

[0024] Although the flat movable plate 61 can meet the needs of loading goods, in order to further improve the reliability of loading goods in the cargo box, the front and rear ends of the movable plate 61 are bent to form upright portions 63, which are used as the front and rear baffles of the cargo box when two movable plates 61 are laid down on the swing beam 3. The gaps of the front and rear end face baffles corresponding to the position of the swing beam 3 are blocked by the upright portions 63, which can further prevent the goods loaded in the cargo box from falling out of the cargo box, and the reliability is better.

[0025] In summary, the cargo box of the three-wheeled vehicle in this embodiment is divided into three parts. The middle part is fixed and the two sides are movable, so that the cargo box can be folded. After folding, the vehicle width is reduced and the space occupation is reduced. When driving, the cargo box can be unfolded, and the wheelbase of the rear two wheels expands with the unfolding of the cargo box, ensuring the stability of the vehicle and loading more goods, thereby improving the adaptability of the three-wheeled vehicle.

[0026] It should be further noted that the technical features such as the power system, driving control system, strength of the cargo box, and thickness of the steel plate of the cargo box of the truck are not described in detail. It is not that these systems and technical features are not needed, but that these systems are all prior arts and do not involve the principle of the present invention. Those skilled in the art can select them flexibly according to needs.

[0027] The parts not described in detail in the present invention are prior arts; for those of ordinary skill in the art, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three - wheel folding truck, including a truck with one wheel at the front and two wheels at the rear, the cargo box of the truck is connected above the two rear wheels; characterized in that: The chassis of the cargo box is divided into three parts, namely the fixed vehicle frame (1) in the middle and the movable vehicle frames (2) on the left and right sides of the fixed vehicle frame (1); the two rear wheels are respectively connected to the lower ends of the two movable vehicle frames (2). The left and right groups of swing beam assemblies are respectively arranged on the left and right sides of the fixed vehicle frame (1); each group of the swing beam assemblies includes a plurality of swing beams (3) arranged in parallel, and both ends of each swing beam (3) are respectively hinged to the movable vehicle frame (2) and the fixed vehicle frame (1) for the two movable vehicle frames (2) to be closable or expandable. It further includes at least a pair of long pin plates (4) and at least a pair of short pin plates (41); when the movable vehicle frame (2) expands, the pins fixedly connected to both ends of the long pin plate (4) are respectively inserted into the pin holes (42) on the fixed vehicle frame (1) and the swing beam (3) to fix the movable vehicle frame (2); when the movable vehicle frame (2) closes, the pins fixedly connected to both ends of the short pin plate (41) are respectively inserted into the pin holes (42) on the fixed vehicle frame (1) and the swing beam (3) to fix the movable vehicle frame (2). The bottom plate of the cargo box is divided into five parts, namely the first part fixedly connected to the fixed vehicle frame (1), and the second and third parts fixed on the two movable vehicle frames (2); the fourth and fifth parts each include two movable plates (61) and are respectively located above the two groups of swing beam assemblies, and are used for when the movable vehicle frames (2) expand, the two movable plates (61) are placed side by side lying on the swing beam (3) as the bottom plate, and are used for when the movable vehicle frames (2) close, the two movable plates (61) are placed upright above the swing beam (3) as side baffle plates.

2. The three-wheel folding freight cart according to claim 1, wherein: There are multiple pairs of the long pin plates (4) and the short pin plates (41), and each swing beam (3) corresponds to one long pin plate (4) and one short pin plate (41).

3. The three - wheel folding freight cart according to claim 1, wherein: The movable plate (61) is provided with a plurality of jacks (62), and the upper end of the hinge shaft (31) of the swing beam (3) extends above the swing beam (3), and is used for when the two movable plates (61) are placed lying on the swing beam (3), the upper end of the hinge shaft (31) is inserted into the jacks (62) to fix the movable plate (61).

4. The three-wheel folding freight vehicle according to claim 3, characterized in that: The lower end of the hinge shaft (31) is provided as a threaded head, and the threaded head is connected to a nut (32) for the hinge shaft (31) to be detachable.

5. The three-wheel folding freight cart according to claim 1, characterized in that: The front and rear ends of the movable plate (61) are bent to form upright portions (63), and are used for when the two movable plates (61) are placed lying on the swing beam (3), the upright portions (63) at the front and rear ends shield the front and rear ends of the cargo box.

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