Frame assembly and combined vehicle

Abstract

The present invention provides a frame assembly and a combined vehicle, wherein the frame assembly comprises a frame, at least one front wheel pivotally arranged on the front side of the frame, and a rotating connection mechanism installed on the rear side of the frame, wherein the rotating connection mechanism is used to rotatably connect the frame to a balance vehicle, so that when the frame rotates relative to the balance vehicle, the front wheel touching the ground can leave the ground; the frame assembly provided by the present invention can rotatably connect the frame assembly and the balance vehicle together to form a combined vehicle, and the combined vehicle can be converted between a balance vehicle and a tricycle, and is suitable for a wide range of people, such as the elderly, children, etc., and is also suitable for beginners who are just learning to use a balance vehicle, and solves the problems that are easily caused by inertia when beginners brake and accelerate; secondly, the turning operation of the combined vehicle can be achieved by the balance vehicle or the frame, or the balance vehicle and the frame cooperate to make the turning more flexible and more stable.

Description

Technical Field

[0001] The invention belongs to the field of electric vehicles, and in particular relates to a frame assembly and a combined vehicle. Background Art

[0002] The existing balance bike mainly includes two wheels and pedals arranged between the two wheels. The user mainly controls the movement of the bike by his own gravity. The current two-wheel balance bike generally has a high center of gravity, which can easily cause beginners to fall due to inertia when braking and accelerating; the existing two-wheel balance bikes are mainly pedal-type or have handlebars, and the riding mode is relatively single, and it is not possible to change multiple riding modes, and the playability is single; ordinary balance bikes are mainly foot-controlled or leg-controlled, and turning is mainly achieved by shifting the center of gravity, and the car is not stable enough when turning. Summary of the invention

[0003] The object of the present invention is to provide a frame assembly, which includes a frame, at least one front wheel pivotally arranged on the front side of the frame, and a rotating connection mechanism installed on the rear side of the frame, wherein the rotating connection mechanism is used to rotatably connect the frame to a balance vehicle, so that when the frame rotates relative to the balance vehicle, the front wheel touching the ground can leave the ground; the frame assembly provided by the present invention can rotatably connect the frame assembly and the balance vehicle to form a combined vehicle, and the combined vehicle can be converted between a balance vehicle and a tricycle, and is suitable for a wide range of people, such as the elderly, children, etc., and is also suitable for beginners who are just learning to use a balance vehicle, solving the problems that are easily caused by inertia when beginners brake and accelerate; secondly, the turning operation of the combined vehicle can be achieved by the balance vehicle or the frame, or the balance vehicle and the frame cooperate to make the turning more flexible and more stable.

[0004] Preferably, the rotating connection mechanism includes a rotating shaft, and the rear side of the frame is rotatably connected to the balancing vehicle via the rotating shaft.

[0005] Preferably, the rotating connection mechanism includes a fixed seat for mounting the balance vehicle, the rear side of the frame is rotatably connected to the fixed seat via a rotating shaft, and the frame can rotate relative to the fixed seat around the rotating shaft; by providing a fixed seat, the balance vehicle can be converted into a combination vehicle without changing the structure of the original balance vehicle.

[0006] Preferably, the rotating connection mechanism includes a connecting seat installed on the rear side of the frame, and the connecting seat is rotatably connected to the fixed seat via a rotating shaft; through the cooperation between the connecting seat and the fixed seat, the rotation process is stable, avoiding the inconvenience of frame installation caused by direct pivot connection between the frame and the fixed seat and also avoiding the rear side of the frame protruding from the combined vehicle.

[0007] Preferably, the fixing seat is a detachable structure, and the fixing seat is detachably fixedly connected to the balance vehicle. Through the detachable operation, the balance vehicle can be released from the combined vehicle, and the riding mode is more selective.

[0008] Preferably, the frame includes a main frame and a front frame connected to the front side of the main frame, the front wheel pivot is arranged at the lower end of the front frame, a handlebar is provided at the upper end of the front frame, the rear side of the main frame is rotatably connected to the balance car through the rotating connection mechanism, the handlebar can make the frame rotate relative to the balance car, so as to realize the lifting of the frame assembly as a whole, and the frame can be lifted as a whole by operating the handlebar, which makes riding more cool and realizes the effect of a drift car.

[0009] Preferably, the mounting position of the connecting seat on the frame can be adjusted so that the distance between the front wheel and the balancing vehicle can be adjusted to meet the needs of people of different heights.

[0010] Preferably, the height of the handlebar relative to the front wheel can be adjusted to meet the needs of people of different heights.

[0011] Preferably, the frame includes a main frame and a front frame connected to the front side of the main frame, the main frame is provided with a plurality of mounting portions at different distances from the front wheel, and the connecting seat is adjusted by selectively being installed on different mounting portions to adjust the distance between the front wheel and the balance vehicle. Through this simple structure, the distance between the front wheel and the balance vehicle can be quickly adjusted.

[0012] Another object of the present invention is to provide a combination vehicle, which includes a balance vehicle and the frame assembly described above, wherein the frame can be rotatably connected to the balance vehicle through a rotating connection mechanism, and when the frame rotates relative to the balance vehicle, the front wheel that touches the ground can leave the ground; the frame assembly provided by the present invention can be rotatably connected to the balance vehicle to construct it into a combination vehicle, and the combination vehicle can be converted between a balance vehicle and a tricycle, and is suitable for a wide range of people, such as the elderly, children, etc., and is also suitable for beginners who are just learning to use balance vehicles, solving the problems that are easily caused by inertia when beginners brake and accelerate; secondly, the turning operation of the combination vehicle can be achieved by the balance vehicle or the frame or the balance vehicle and the frame, and the turning is more flexible.

[0013] Through the frame assembly provided by the present invention, a combined vehicle is obtained. Compared with a single balance vehicle, the combined vehicle has improved safety and is easy to use, and is suitable for beginners and children or elderly people who need certain protection to ride. Moreover, through the rotating connection mechanism provided by the present invention, the front wheel of the frame assembly can be lifted off the ground, providing a variety of riding methods, such as riding the balance vehicle alone, or the balance vehicle and the front wheel can be transformed into a tricycle. It is suitable for young people, is relatively cool, and has stronger playability.

[0014] Contents of attached pictures

[0015] Figure 1 A schematic diagram of the structure of the combined vehicle provided by the present invention;

[0016] Figure 2 A schematic diagram of the front wheel of the combined vehicle provided by the present invention in the state of touching the ground and leaving the ground;

[0017] Figure 3 and Figure 4 They are respectively a structural schematic diagram and a structural disassembly diagram of the frame assembly provided by the present invention;

[0018] Figure 5 A schematic diagram of the structural disassembly of the frame provided by the present invention;

[0019] Figure 6 A schematic structural diagram of a frame assembly with a functional extension member provided by the present invention. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

[0021] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "inside", "outside", "upper", "lower", "radial" and "longitudinal" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1As shown, an embodiment of the present invention provides a frame assembly, which includes a frame 2, at least one front wheel 3 pivotally mounted on the front side of the frame, and a rotating connection mechanism installed on the rear side of the frame; the frame 2 is rotationally connected to the balance vehicle 1 through the rotating connection mechanism, and through the rotating connection mechanism, when the frame 2 rotates relative to the balance vehicle 1, the front wheel 3 that touches the ground can leave the ground.

[0024] The above-mentioned “the front wheels touching the ground can leave the ground” can be broadly understood as at least one front wheel being able to change from a touching the ground state to a lifting state, and the ground can also be broadly interpreted as: other platforms or surfaces that have a certain supporting effect on the front wheels.

[0025] The frame assembly in the present invention is used in combination with a balance vehicle, wherein the balance vehicle includes a single-wheel or multi-wheel self-balancing vehicle; preferably, a two-wheel rodless balance vehicle is used in the present invention.

[0026] refer to Figure 2 The frame assembly provided by the present invention can be combined with a balance car to obtain a combination car; it can be understood that the number of front wheels on the front side can be more than one, and the combination car can be converted between a balance car and a multi-wheeled car; in this embodiment, a front wheel is pivotally provided on the front side of the frame, and the combination car can be converted between a balance car and a tricycle. Specifically, when the front wheel is supported on the ground, the combination car is a tricycle. Compared with the balance car, the tricycle has greatly improved safety and stability and is suitable for a wide range of people, such as the elderly and children. It can also be suitable for beginners who are just learning to use a balance car to avoid problems that are easily caused by inertia when braking and accelerating. When the front wheel is lifted off the ground by a rotating connection mechanism, the combination car is transformed into a separate balance car for riding; in addition, the combination car provided by the present invention can be used for the rider to lift the front wheel for playing, and the front wheel off the ground cooperates with the balance car to achieve the effect of a drift car, increase the playability of the product, and return to childhood fun.

[0027] Through the above-mentioned combined vehicle, the present invention provides a variety of turning modes. Specifically, when a rider rides the combined vehicle, the rider can stand on the pedal of the balance vehicle and can rely on the turning function of the balance vehicle itself to achieve turning; the rider can also rely on the frame to make a turn, for example, by controlling the rotation of the front wheel of the frame to control the turning of the combined vehicle; the frame can also be used in combination with the turning function of the balance vehicle, and the turning control process is more flexible;

[0028] In an embodiment of the present invention, the frame 2 provided by the present invention includes a main frame 20 and a front frame connected to the front side of the main frame 20, the front wheel 3 is pivotally arranged at the lower end of the front frame, a handlebar 21 is provided at the upper end of the front frame, and the rear side of the main frame 20 is rotatably connected to the balance vehicle through the rotating connection mechanism; lifting the handlebar 21 can rotate the frame assembly 2 relative to the balance vehicle, thereby lifting the front wheel 3 off the ground, providing a form of play similar to a drift vehicle; and the presence of the handlebar allows the rider to ride with his hands on the handlebar 21, and the riding process is smoother and safer.

[0029] The handlebar 21 in the above embodiment can be connected to the front wheel to control the left and right steering of the front wheel through the handlebar. With this arrangement, the steering control of the combined vehicle is more flexible and more convenient than riding a single balance vehicle; and when riding the combined vehicle, the rider can stand on the balance vehicle, control the front wheel to lift up through the handlebar, and control the front wheel to turn left and right at the same time, which is more playable and suitable for young people who pursue a new experience.

[0030] In the embodiment of the present invention, the frame is a foldable frame, which can effectively reduce the storage volume of the combined vehicle and facilitate storage and carrying.

[0031] In an embodiment of the present invention, the rotating connection mechanism includes a rotating shaft 6 arranged on the rear side of the frame, and the frame 2 can rotate around the rotating shaft; optionally, the frame is directly connected to the balance vehicle through the rotating shaft, so that the frame can rotate around the rotating shaft relative to the balance vehicle, and the front wheel touching the ground can be lifted off the ground when the balance vehicle is stationary; in other embodiments of the present invention, in order to avoid improving the existing balance vehicle structure, the rotating connection mechanism provided by the present invention also includes a fixed seat 4 for installing the balance vehicle, that is, the fixed seat is installed on the balance vehicle, and then the frame is rotatably connected to the fixed seat through the rotating shaft, so that the frame can rotate around the rotating shaft relative to the fixed seat. In this way, by equipping the balance vehicle 1 with a fixed seat 4, the rotation of the frame relative to the balance vehicle can be achieved without changing the structure of the balance vehicle 1.

[0032] In an embodiment of the present invention, the rotating connection mechanism includes a connecting seat 5 installed on the rear side of the frame, and the connecting seat 5 is rotatably connected to the fixing seat 4 through a rotating shaft 6. In this way, the connecting seat 5 cooperates with the fixing seat 4 to rotatably connect the frame assembly 2 and the balance vehicle 1; it can be understood that the connecting seat can be directly fixed on the rear side of the frame, and can also be fixedly connected to the rear side of the frame in a removable manner.

[0033] In the embodiment of the present invention, the fixing seat is a detachable structure, and the fixing seat 4 is detachably fixedly connected to the balance vehicle 1. In this way, the connection between the balance vehicle 1 and the frame 2 can be released by the disassembly operation, so that an independent balance vehicle can be separated from the combined vehicle, and the balance vehicle and the frame assembly can be combined together to form a combined vehicle for riding as needed;

[0034] Optionally, the fixing seat 4 is a quick-release structure, which is used to lock the balancing vehicle; in this embodiment, Figure 3 and Figure 4 As shown, the fixing seat includes an upper clamping member 41, a lower clamping member 44 and a locking mechanism; the upper clamping member 41 cooperates with the lower clamping member 44 to form a limiting surface 40 for locking the balance vehicle 1, and the upper clamping member 41 and the lower clamping member 44 are locked or unlocked by the locking mechanism, refer to Figure 5 , the upper clamping member 41 and the connecting seat 5 are correspondingly provided with pivot holes (410, 501, 502) for the rotating shaft 6 to pivotally pass through; optionally, the rotating shaft is a pair of locking screws 61, 62, and the pair of locking screws 61, 62 pass through the pivot holes (410, 501, 502) correspondingly provided on the upper clamping member and the connecting seat through a spacer sleeve 63; specifically, the pair of locking screws pass through the pivot holes through the spacer sleeve; since the connecting seat is fixedly connected to the rear side of the frame assembly, the frame assembly can drive the connecting seat 6 to rotate around the pair of locking screws; in this way, when the rider lifts the handlebars, the frame, the front wheel and the connecting seat are lifted as a whole through the rotational connection relationship between the upper clamping member and the connecting seat; in one embodiment of the present invention, In a specific embodiment, the upper clamping member 41 and the lower clamping member 44 respectively have a first side and a second side that are arranged opposite to each other, the first side of the upper clamping member is hinged to the first side of the lower clamping member, the hinge axis is a pair of locking screws 431, 432, and the second side of the upper clamping member or the second side of the lower clamping member is provided with a locking mechanism, and the locking mechanism is used to lock or unlock the upper clamping member and the lower clamping member; with such a configuration, the upper and lower clamping members can be adapted to the shapes of various balance vehicles, so the locking mechanism can be applied to various types of balance vehicles; and the upper clamping member, the lower clamping member and the locking mechanism can be used to control the locking or unlocking of the human-machine interactive balance vehicle, which facilitates the locking or unlocking operation. In the above optional embodiments, the upper clamping member and the lower clamping member respectively have limiting surfaces, and the two limiting surfaces are used to cooperate with the ring to lock the balance vehicle;

[0035] In this embodiment, the locking mechanism includes a lever 47 and a bolt 46. One end of the bolt 46 is hinged to one end of the lever 47, and the other end of the bolt is hinged to the second side of the upper clamping member 41. The second side of the lower clamping member 44 is correspondingly provided with a locking groove. The lever is used to drive the bolt 46 into the locking groove and rotate the upper pull bolt. The second sides of the upper and lower clamping members are close to each other to lock the balance vehicle. The lever 47 is also used to drive the bolt to leave the locking groove and unlock the upper and lower clamping members. Specifically, one end of the bolt is hinged to one end of the lever through a connecting shaft 45. The connecting shaft 45 is horizontally installed at one end of the lever, and one end of the bolt 46 is rotatably connected to the connecting shaft 45. The bolt can move in two dimensions relative to the lever, that is, The lever can swing up and down and rotate horizontally relative to the bolt; the other end of the bolt is hinged to the second side of the upper clamping member through a connecting shaft 42, and the connecting shaft 42 is horizontally installed on the second side of the upper clamping member. The other end of the bolt is rotatably connected to the connecting shaft 42, and the bolt can move in two dimensions relative to the upper clamping member, that is, the bolt can rotate horizontally and swing up and down; the lever can drive the bolt into the locking groove, and the lever rotates, which can make the end rotate around the bolt. Since the end of the lever is an eccentric circular shaft structure, as the lever rotates, the bolt will be driven to move away from the lower clamping member, thereby driving the second side of the upper clamping member to approach the second side of the lower clamping member, and preferably the two second sides are aligned and abutted. The rotation angle of the lever determines the clamping degree of the upper and lower clamping members. The handle end of the lever also has a concave surface facing the lower clamping member, and one end of the concave surface is connected to a convex surface facing the lower clamping member. The lever is rotated to the second side edge of the lower clamping member, and the upper clamping member and the lower clamping member are clamped together. The concave surface of the lever 47 can accommodate the second side edge of the upper and lower clamping members, and the convex surface of the lever can be just stuck on the second side edge of the upper clamping member, thereby locking the middle part of the human-machine interactive balance car.

[0036] In this embodiment, the limiting surface 40 is a surface that matches the appearance of the human-machine interactive balance vehicle. Any surface structure that can lock any part of the human-machine interactive balance vehicle can be called a limiting surface. The limiting surface can have a variety of shapes, for example, it can be a plane, it can be a curved surface, it can be a circular limiting surface, or it can be a concave arc limiting surface, or other irregular limiting surfaces. In this way, the upper and lower clamping members can lock the middle part of the human-machine interactive balance vehicle through the limiting surface, or other parts that can be locked by the upper and lower clamping members. The locking mechanism is suitable for a balance vehicle with a part that can be matched with the limiting surface. For example, the human-machine interactive balance vehicle can have a crossbar arranged between two wheels or between two pedals.

[0037] Furthermore, in an embodiment of the present invention, the distance between the front wheel 3 provided by the present invention and the balance vehicle 1 can be adjusted to accommodate riders of different heights and different riding needs; when, as in the present embodiment, a front wheel is provided on the front pivot of the frame, the "distance between the front wheel 3 and the balance vehicle 1" herein refers to: taking the front wheel as a reference, the distance between the reference reference and the balance vehicle; when the front pivot of the frame is provided with more than two front wheels, the "distance between the front wheel 3 and the balance vehicle 1" herein refers to: taking one of the front wheels as a reference, the distance between the reference reference and the balance vehicle.

[0038] In a specific embodiment of the present invention, the distance between the front wheel 3 and the balance vehicle 1 is achieved by adjusting the installation position of the connecting seat on the frame; specifically, the rear side of the frame is provided with multiple sets of mounting parts along its longitudinal extension direction, and the multiple sets of mounting parts here can be arranged in a straight line in the longitudinal direction, or can be staggered, as long as the overall arrangement in the longitudinal direction can adjust the distance between the front wheel and the balance vehicle; Figure 3 As shown, in this embodiment, the frame 2 includes a main frame 20 and a front frame connected to the front side of the main frame, and the handlebar 21 is arranged on the front frame. The main frame 20 is provided with a plurality of mounting parts with different distances from the front wheel, and the connecting seat 5 is selectively installed on different mounting parts to adjust the distance between the front wheel 3 and the balance vehicle 1; specifically, in this embodiment, the main frame 20 has a connecting rod 204 and a transition rod 205 for connecting the connecting rod 204 and the front frame, and the plurality of mounting parts are a plurality of mounting holes A201, 202, 203 arranged at intervals along the longitudinal extension direction of the connecting rod 204; the connecting seat 5 is installed in different groups of mounting holes to adjust the distance between the front wheel 3 and the balance vehicle 1; the connecting seat 5 is formed with mounting holes B corresponding to the mounting holes A; as shown Figure 6As shown, in this embodiment, two pairs of mounting holes B (551, 552, 553, 554) are provided on the connecting seat 5, wherein a pair of mounting holes B 551 and mounting holes B 553 are arranged opposite to each other on the left and right of the connecting seat, and another pair of mounting holes B 552 and mounting holes B 554 are arranged opposite to each other on the left and right of the connecting seat; correspondingly, a group of mounting holes A are arranged into pairs of mounting holes A (for example, mounting hole A 201 includes a first mounting hole A 2011 and a second mounting hole A 2012 arranged in pair with the first mounting hole A 2011); when the connecting seat is installed on the frame assembly, a group of mounting holes A is selected according to the use needs of the rider, and then the connecting seat is fixedly connected to the frame by fasteners cooperating with the mounting holes A and the mounting holes B; optionally, the mounting holes A are two spacers that pass through the rear side of the frame; for example, the connecting seat needs to be connected to the mounting holes A 201, the locking screw 1 (511, 512) is passed through the mounting hole B (551, 553) and the first mounting hole A 2011 to lock it; the locking screw 2 (521, 522) is passed through the mounting hole B (552, 554) and the second mounting hole A 2012 to lock it; in this way, the connecting seat is connected to the mounting hole A 201; optionally, the connecting seat 5 forms an inner concave surface 53 for the rear end of the connecting rod 204 to be positioned therein, so as to prevent the rear end of the connecting rod from protruding outward.

[0039] Furthermore, the height of the handlebar 21 relative to the front wheel 3 can be adjusted to accommodate riders of different heights and different riding needs.

[0040] In a specific embodiment of the present invention, Figure 4 As shown, the front frame also includes a head tube 25, a straight rod 23 and a front fork tube 27 respectively inserted into the head tube 25 from the upper end and the lower end of the head tube 25, the front wheel 3 is pivoted on the front fork tube, the upper end of the straight rod 23 is used to connect the front 22 and the handlebar 21, the straight rod 23 is telescopically inserted in the head tube 25, and the height of the handlebar 21 relative to the front wheel is adjusted by the telescopic movement of the straight rod 23 in the head tube 25;

[0041] In this embodiment, reference Figure 4The straight rod 23 comprises an upper straight rod 231 and a lower straight rod 232 which are in contact with each other. A chamfered surface 233 matching each other is formed at the contact point between the upper straight rod 231 and the lower straight rod 232. It can be understood that the chamfered surface comprises a lower chamfered surface at the bottom of the upper straight rod and an upper chamfered surface at the top of the lower straight rod. When the lower chamfered surface at the lower end of the upper straight rod can be staggered and abutted with the upper chamfered surface at the upper end of the lower straight rod, the upper straight rod cooperates with the lower straight rod to make the straight rod radially widen in the head tube, and the widened straight rod can be clamped in In the head tube 25, when the lower beveled surface at the lower end of the upper straight rod matches and docks with the upper beveled surface at the upper end of the lower straight rod, the radial size of the straight rod in the head tube allows it to move up and down in the head tube. In this way, when the height of the handlebar needs to be adjusted, the upper straight rod is matched and docked with the lower straight rod, and then it is moved up and down in the head tube. When adjusted to a predetermined height, the upper straight rod and the lower straight rod are staggered and abutted, and the straight rod is clamped in the head tube as a whole; optionally, a driving member is provided to drive the lower straight rod to move up and down in the head tube The upper beveled surface of the lower straight rod is moved, thereby causing the upper beveled surface thereof to match and abut or stagger with the upper beveled surface of the upper straight rod; in a specific embodiment of the present invention, the driving member can be a screw 28, which has a head, a column section located in the middle section, and a threaded section located in the bottom section. The head is fixed to the headstock, and the body section can rotatably penetrate the headstock and the upper straight rod, and the threaded section is screwed into the bottom of the lower straight rod. In this way, the lower straight rod can be driven to move up and down in the head tube by adjusting the screw, thereby adjusting the screw drive The inclined surface of the upper straight rod is staggered or matched with the inclined surface of the lower straight rod; specifically, when the adjusting screw is tight, the lower straight rod can be staggered and connected with the upper straight rod, so that it becomes wider in the radial direction of the head tube, and the head tube can be tightened to fix the two. When the screw is adjusted to loosen, the staggered position of the lower straight rod and the upper straight rod becomes smaller, so that the overall width of the lower straight rod and the screw becomes narrower, and the handlebar can be moved, rotated or moved up and down in the head tube, so as to achieve the up and down adjustment of the handlebar; the structure can be adjusted up and down and left and right, and is suitable for a wide range of people;

[0042] Optionally, the lower straight rod preferably has a rough outer wall to increase the friction between the outer wall of the straight rod and the inner wall of the head tube, thereby strengthening the tension of the straight rod in the head tube; the rough outer wall can be an uneven outer wall or can be made of anti-friction material. In this embodiment, the lower straight rod can be a tungsten wire head structure, which can strengthen the fixing strength of the straight rod in the head tube.

[0043] Alternatively, the straight rod 23 is inserted into the head tube 25 through the bead bowl 24, thereby realizing the rotatable function of the handlebar; the upper end of the front fork tube is inserted into the head tube through the bead bowl; in some embodiments of the present invention, the handlebar has a handlebar tube 211 and grip covers 212, 213 inserted at both ends of the handlebar tube; the handlebar tube is set through the head 22.

[0044] In another embodiment of the present invention, reference Figure 6The frame includes a main frame and a front frame connected to the front side of the main frame, the rear side of the frame is connected to a balance car, and a functional extension part is installed on the frame, the functional extension part includes a carrying part 8, which solves the problem that the existing balance car is only suitable for playing and cannot be used for shopping and has no storage space; it provides storage space or carrying function; in the present invention, the "carrying" and "storing" involved in the "objects" include objects with life characteristics and objects without life characteristics, such as adults, babies, animals, boxes, etc.

[0045] Optionally, the object carrier is installed on the main frame, which does not affect the riding while increasing the practicality; the object carrier provided in this embodiment is installed on the main frame. In one embodiment of the present invention, the object carrier is detachably installed on the main frame to provide a multi-functional riding method; for example, when it is needed to be used as a balance car or as a drift car, the object carrier can be removed from the main frame first, and then the frame and the front wheel can be lifted. This measure can avoid the problem of the weight of the object carrier causing the rider to have difficulty lifting the frame; when it is used as a combination vehicle, the object carrier can be installed on the main frame.

[0046] Optionally, the main frame has a connecting rod 204 and a transition rod 205 for connecting the connecting rod 204 and the front frame, and the transition rod 205 is connected to the head pipe 25 by screws and nuts 206, 207. A accommodating space is formed between the connecting rod and the transition rod, or on the non-front wheel side of the transition rod alone, or above the connecting rod for accommodating objects; in this way, objects with strong bearing capacity and large storage volume can be accommodated; optionally, the shape of the object is matched with the accommodating space, so that a gap can be avoided between the storage component and the frame to prevent accumulation of debris or dangerous riding, and a larger storage volume can be provided.

[0047] In this embodiment, the object carrier is fixed on the connecting rod 204; optionally, the object carrier can be fixedly mounted on a mounting portion formed on the connecting rod; for example, a group of mounting holes 201 are selected to mount the object carrier on the connecting rod, or multiple groups of mounting holes 201, 202, 203 are selected to mount the object carrier on the connecting rod; that is, the existence of the mounting portion can not only adjust the distance between the front wheel and rear wheel assemblies, such as a balance vehicle, but can also be used to mount the object carrier, thereby realizing the multifunctional use of the mounting portion.

[0048] In this embodiment, the object carrier 8 includes a storage basket, a courier box, a baby basket or a child seat.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A frame assembly, characterized in that: The frame assembly includes a frame, at least one front wheel pivotally mounted on the front side of the frame, and a rotation connection mechanism mounted on the rear side of the frame, wherein the rotation connection mechanism is used to rotatably connect the frame to the balance vehicle, so that when the frame rotates relative to the balance vehicle, the front wheel touching the ground can leave the ground; The rotating connection mechanism includes a fixing seat for mounting the balancing vehicle, the rear side of the frame is rotatably connected to the fixing seat via a rotating shaft, and the frame can rotate relative to the fixing seat around the rotating shaft; The fixing seat is a detachable structure, and is used for detachable connection with the balancing vehicle; The frame includes a main frame and a front frame connected to the front side of the main frame, the front wheel pivot is arranged at the lower end of the front frame, a handlebar is arranged at the upper end of the front frame, and the rear side of the main frame is rotatably connected to the balance vehicle through the rotation connection mechanism; The height of the handlebar relative to the front wheel can be adjusted; The frame comprises a main frame and a front frame connected to the front side of the main frame. The main frame is provided with a plurality of mounting parts at different distances from the front wheel. The connecting seat can be selectively installed on different mounting parts to adjust the distance between the front wheel and the balancing vehicle.

2. The frame assembly according to claim 1, characterized in that: The rotating connection mechanism comprises a rotating shaft, and the rear side of the frame is rotatably connected to the balancing vehicle via the rotating shaft.

3. The frame assembly according to claim 1, characterized in that: The rotation connection mechanism comprises a connection seat installed at the rear side of the frame, and the connection seat is rotationally connected to the fixing seat via a rotating shaft.

4. The frame assembly according to claim 3, characterized in that: The installation position of the connecting seat on the frame can be adjusted so that the distance between the front wheel and the balancing vehicle can be adjusted.

5. A combined vehicle, characterized in that: The combined vehicle comprises a balancing vehicle and a frame assembly as described in any one of claims 1 to 4.

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