Loading vehicle

Abstract

The utility model provides a loading vehicle which comprises a plurality of folding units connected with one another and advancing wheels arranged at the bottoms of the folding units, each folding unit comprises outer frame rod sets arranged in pairs and a plurality of pairs of cross rods, each outer frame rod set comprises a plurality of vertical rods, at least one movable connecting piece is arranged on each vertical rod in a sliding mode, and the movable connecting pieces are connected with the folding units. Each pair of crossed rods are arranged in a crossed mode and hinged to each other at the crossed position, the first ends of each pair of crossed rods are hinged to the vertical rods in the different outer frame rod sets respectively, and the second ends of each pair of crossed rods are hinged to the movable connecting pieces on the vertical rods in the different outer frame rod sets respectively; the first end of one cross rod and the second end of the other cross rod in each pair of cross rods are connected to the same vertical rod, and the paired outer frame rod sets can be close to or away from each other, so that the space defined by the vertical rods is shrunk or expanded. The folding units in the loading vehicle can be independently folded, the overall capacity and the external size of the loading vehicle can be freely adjusted, and the adaptability of the loading vehicle to various use scenes is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of daily necessities, and particularly to a loading vehicle. Background Art

[0002] Folding carts are often used in outdoor camping, parent-child tourism and other scenarios. When it is necessary to carry ingredients and other materials or carry children to play, the materials or children can be placed in the cart bin, and the load is supported by the bottom rollers of the folding cart, achieving the effect of saving the user's physical strength. And after use, the folding cart can also be folded to reduce its own volume and is convenient to carry.

[0003] However, the existing folding carts have a relatively simple structure and usually can only switch between the opened state and the folded state. When opened for use, the capacity and size of the cart are generally fixed, resulting in the lack of convenience of the cart in some environments and unable to meet the various needs of consumers in different usage environments. Summary of the Utility Model

[0004] The utility model aims to solve one of the technical problems in the related art to a certain extent. For this purpose, the utility model provides a loading vehicle, the folding unit of which can be independently folded, and can freely adjust the overall capacity and external size of the loading vehicle, improving the adaptability of the loading vehicle to various usage scenarios.

[0005] To achieve the above object, the utility model provides a loading vehicle, which includes a plurality of interconnected folding units and a plurality of traveling wheels arranged at the bottom of the folding units. The folding unit includes a pair of outer frame rod groups and multiple pairs of cross rods. The outer frame rod group includes a plurality of vertical rods. Each pair of cross rods is cross-arranged and hinged to each other at the intersection. The first ends of each pair of cross rods are respectively movably connected to the vertical rods in different outer frame rod groups, and the second ends of each pair of cross rods are respectively movably connected to the vertical rods in different outer frame rod groups. And the first end of one cross rod in each pair of cross rods and the second end of the other cross rod are connected to the same vertical rod. The paired outer frame rod groups can approach or move away from each other, so that the cross rods between the outer frame rod groups are folded and the space defined by the plurality of vertical rods is contracted, or the cross rods between the outer frame rod groups are opened and the space defined by the plurality of vertical rods is expanded.

[0006] Optionally, a movable connecting piece is movably arranged on the vertical rod, and one of the first end and the second end of the cross rod is hinged to the corresponding vertical rod, and the other is hinged to the movable connecting piece on the corresponding vertical rod.

[0007] Optionally, the movable connecting piece is slidably arranged on the corresponding vertical rod.

[0008] Optionally, the movable connecting member extends in the same direction as the vertical rod, and the interior of the vertical rod has a hollow fitting hole. The movable connecting member is disposed in the hollow fitting hole and can slide along the hollow fitting hole.

[0009] Optionally, the first end of the cross rod is hinged to the corresponding vertical rod, and the two ends of the movable connecting member are respectively hinged to the second end of the corresponding cross rod and the corresponding vertical rod; or,

[0010] The second end of the cross rod is hinged to the corresponding vertical rod, and the two ends of the movable connecting member are respectively hinged to the first end of the corresponding cross rod and the corresponding vertical rod.

[0011] Optionally, the movable connecting member is located below the hinged position of the vertical rod and the corresponding cross rod, that is, the top end of the cross rod is hinged to the vertical rod, and the bottom end of the cross rod is hinged to the movable connecting member.

[0012] Optionally, the top end of the cross rod is hingedly connected to the top end of the vertical rod.

[0013] Optionally, a plurality of the folding units are sequentially connected in the vehicle length direction, and each pair of the outer frame rod groups of the folding unit are symmetrically arranged in the vehicle length direction.

[0014] Optionally, the loading vehicle further includes a storage pocket, which includes a surrounding wall and a bottom sheet. The surrounding wall is arranged around the space defined by a plurality of the folding units, and the bottom sheet is connected to the bottom of the surrounding wall and seals the bottom opening of the surrounding wall.

[0015] Optionally, the top of the surrounding wall has a mounting hole, and the mounting hole is sleeved on the vertical rod.

[0016] Optionally, a strap is arranged on the surrounding wall, and the surrounding wall is fixed to the outer frame rod group through the strap.

[0017] Optionally, the storage pocket further includes at least one partition, which is arranged between the spaces defined by adjacent folding units and separates the spaces defined by adjacent folding units.

[0018] Optionally, the traveling wheels include at least one first traveling wheel arranged on one side of the loading vehicle in the vehicle length direction and a plurality of second traveling wheels arranged on the other side of the loading vehicle in the vehicle length direction.

[0019] Optionally, the first traveling wheel is a universal wheel, and the second traveling wheel is a directional wheel, or the first traveling wheel is a directional wheel, and the second traveling wheel is a universal wheel.

[0020] Optionally, the first traveling wheel is a universal wheel, and the first traveling wheel is disposed at the bottom end of the vertical rod on one side of the loading vehicle along the vehicle length direction.

[0021] Optionally, a brake is provided on the first traveling wheel, and the brake can stop the first traveling wheel from rotating when pressed on one side and allow the first traveling wheel to rotate when pressed on the other side.

[0022] Optionally, the loading vehicle further includes a pull rod, one end of the pull rod is hinged to the folding unit at one end along the vehicle length direction, and a pull ring is provided at the other end of the pull rod.

[0023] Optionally, the pull rod is hinged to the folding unit provided with the universal wheel.

[0024] Optionally, the pull rod includes a first sleeve and a second sleeve. The first sleeve is sleeved outside the second sleeve. The first end of the first sleeve is hinged to the loading vehicle. The first end of the second sleeve is located inside the first sleeve. The second end of the second sleeve is fixedly connected to the pull ring. The second sleeve can slide in the first sleeve to change the length of the pull rod.

[0025] Optionally, a locking assembly is provided on the first sleeve, and the locking assembly can selectively lock the position of the second sleeve in the first sleeve to fix the length of the pull rod.

[0026] Optionally, the vertical rods of the outer frame rod group are symmetrically arranged along the vehicle width direction, and the vehicle width direction intersects with the vehicle length direction.

[0027] Optionally, each folding unit includes a pair of the outer frame rod groups symmetrically arranged along the vehicle length direction, and each outer frame rod group includes a pair of the vertical rods symmetrically arranged along the vehicle width direction.

[0028] Optionally, the movable connecting member includes a sliding sleeve and a sliding hinge portion. The sliding sleeve is sleeved on the corresponding vertical rod, and the sliding hinge portion is hinged to the cross rod.

[0029] Optionally, the sliding hinge portion includes a pair of sliding hinge plates spaced along the vehicle width direction. A sliding hinge hole is formed in the sliding hinge plate. The cross rod is hinged to the sliding hinge portion through a fastener passing through the sliding hinge hole and a connecting through hole on the cross rod.

[0030] Optionally, at least part of the vertical rods have hollow matching holes inside; the loader also includes a plurality of extension bars, each of which includes an enclosure and a plurality of plug-in rods, the top ends of the plug-in rods are fixedly connected to the enclosure, and the bottom ends of the plug-in rods are inserted into the hollow matching holes, so that the height of the enclosure relative to the outer frame rod group can be adjusted.

[0031] Optionally, the enclosure portion includes an extended crossbeam extending in the vehicle width direction and a plurality of adapters, the adapters are arranged in pairs at both ends of each extended crossbeam, and the extended crossbeam is connected to the top ends of the plug-in rods on both sides through the adapters.

[0032] Optionally, the storage pocket further comprises an expansion sleeve, wherein the expansion sleeve is arranged around the space defined by the plurality of folding units, and the bottom opening of the expansion sleeve is connected to the top opening of the enclosure, and the top of the expansion sleeve is connected to the enclosure.

[0033] Optionally, the expansion sleeve is made of mesh material.

[0034] Optionally, at least a portion of the vertical rods are fixedly provided with an extension connector, the extension connector is hingedly connected to the first end of the corresponding cross rod, and the extension connector can also selectively fix the position of the plug-in rod in the hollow matching hole.

[0035] Optionally, the extended connecting pieces are fixedly provided on the vertical rods at both ends along the vehicle length direction.

[0036] Optionally, the loading vehicle further comprises a plurality of top cross beams, and the extension connectors on each pair of the vertical rods are fixedly connected via the top cross beams.

[0037] Optionally, the enclosure has a connecting inner hole at the top of one side of the top crossbeam, and the top crossbeam passes through the connecting inner hole in the enclosure to fix the height position of the enclosure.

[0038] Optionally, the expansion connector comprises an expansion sleeve, an expansion hinge, an expansion button, a fixing pin and an expansion elastic member, the expansion sleeve is sleeved on the vertical rod, the expansion hinge is located on the expansion sleeve, and the expansion hinge is hingedly connected to the first end of the corresponding cross rod, the expansion sleeve has a first avoidance hole communicating with the interior thereof, the expansion button has a pressing end and a driving end, and the expansion button is hingedly connected to the expansion sleeve at a position between the pressing end and the driving end, one end of the fixing pin is connected to the driving end, and the other end passes through the first avoidance hole;

[0039] The plugging rod is provided with at least one mating pin hole, and the expansion elastic member can drive the pressing end of the expansion button away from the vertical rod through elastic force, so that the driving end approaches the vertical rod and drives the fixing pin into the mating pin hole, and fixes the position of the plugging rod in the hollow mating hole.

[0040] Optionally, the expansion hinge portion includes a pair of expansion hinge plates spaced along the vehicle width direction, an expansion hinge hole is formed in the expansion hinge plate, and the cross rod is hingedly connected to the expansion hinge portion through a fastener passing through the expansion hinge hole and the connection through hole on the cross rod.

[0041] Optionally, the expansion mounting sleeve is provided with a button groove, the first avoidance hole communicates the button groove with the inside of the expansion mounting sleeve, the expansion button is arranged in the button groove, and the expansion button is hinged to the side wall of the button groove.

[0042] Optionally, the vertical rod is provided with a second avoidance hole penetrating from the outer surface of the vertical rod to the hollow mating hole, and the position of the first avoidance hole corresponds to the position of the second avoidance hole.

[0043] Optionally, the folding unit further includes a bottom support frame, the bottom support frame is connected between the bottoms of the outer frame rod groups of the folding unit, and the bottom support frame can be folded when the outer frame rod groups approach each other, and can be unfolded when the outer frame rod groups move away from each other, and is erected between the outer frame rod groups.

[0044] Optionally, the loading vehicle further includes a plurality of bottom cross beams, and at least one pair of the bottom ends of the vertical rods of at least one bottom support frame in each folding unit are fixedly connected through the bottom cross beams;

[0045] The bottom support frame includes a bottom support frame body and connecting strips arranged in pairs on both sides of the bottom support frame body. The first end of the bottom support frame body is hinged to the bottom end of one side of the outer frame rod group. The second end of the bottom support frame body can be laid on the corresponding bottom cross beam of the outer frame rod group on the opposite side when the folding unit is unfolded. One end of the connecting strip is hinged to the bottom end of the outer frame rod group on the opposite side, and the other end of the connecting strip is hinged to the part between the first end and the second end of the bottom support frame body.

[0046] Optionally, the bottom support frame body includes a lapping frame bar, a transverse frame bar and a pair of side frame bars. The first end of the side frame bar forms the first end of the bottom support frame body. The second ends of the side frame bars are respectively fixedly connected to both ends of the transverse frame bar. The lapping frame bar is used for lapping on the bottom cross beam. The end of the connecting strip is hinged to the part between the first end and the second end of the side frame bar. The transverse frame bar is connected between the side frame bars.

[0047] Optionally, the bottom support frame further includes at least one longitudinal frame bar, and two ends of the longitudinal frame bar are respectively fixedly connected to the overlapping frame bar and the transverse frame bar.

[0048] Optionally, the first traveling wheel is a universal wheel, a central area of the bottom cross beam corresponding to the first traveling wheel has a recess formed by downward bending, and the pull rod is hingedly connected to the recess.

[0049] Optionally, the loading vehicle further includes a plurality of cross beam connectors. Bottom ends of adjacent vertical rods of adjacent folding units are interconnected through the cross beam connectors, and the cross beam connectors on two sides are interconnected through the bottom cross beam.

[0050] Optionally, the second traveling wheel is a directional wheel, and the second traveling wheel is disposed on the bottom cross beam on one side of the loading vehicle along the vehicle length direction.

[0051] Optionally, the loading vehicle further includes a plurality of locking mechanisms and a plurality of locking blocks. At least one vertical rod in the folding unit is provided with the locking mechanism, at least one vertical rod is provided with the locking block, the locking mechanism can be latched with the locking block when the folding unit is folded to keep the folding unit in a folded state, and can also selectively release the locking block to enable the folding unit to be unfolded.

[0052] Optionally, a fixing ring is provided on the locking mechanism, and a plurality of fixing buckles are provided on the enclosure. The fixing buckles pass through the fixing ring and are connected to the fixing ring to connect the enclosure to the locking mechanism.

[0053] Optionally, the locking mechanism includes a mounting seat, a locking member, and an elastic member. The locking mechanism is disposed at the top of the connection between adjacent folding units, and the mounting seat is fixedly connected to the top ends of the vertical rods of adjacent folding units. One side of the locking member facing the mounting seat has a locking surface, and a mating groove is provided on the locking surface. The elastic member is used to drive the locking member close to the mounting seat through elastic force;

[0054] When the folding unit on the corresponding side is folded, the locking block can enter and be clamped in the mating groove to keep the folding unit on the corresponding side in a folded state; when the locking member is pulled away from the mounting seat under an external force, the locking block in the mating groove can be released to allow the folding unit to be unfolded.

[0055] Optionally, one side edge of the locking member along a direction perpendicular to the extending direction of the mating groove has a concave notch.

[0056] Optionally, the locking block has a first mating inclined surface for contacting the locking member. There is an included angle between the first mating inclined surface and the direction in which the locking block enters the mating groove, and the first mating inclined surface can push the locking member away from the mounting seat during the process of the locking block entering the mating groove.

[0057] Optionally, the thickness of the locking member gradually decreases near the edge, and a second mating inclined surface is formed at the edge of the locking surface.

[0058] Optionally, on the side of the mounting seat facing away from the locking member, there are a plurality of mounting grooves. The ends of the vertical rods of adjacent folding units are fixedly arranged in the mounting grooves, and the bottom of the mounting groove has a guiding avoidance hole penetrating through to the other surface of the mounting seat;

[0059] The locking member is provided with paired guiding cylinders. The guiding cylinders pass through the plurality of guiding avoidance holes one by one and enter the plurality of vertical rods. The elastic member is a spring, and the elastic member is sleeved on the guiding cylinders. The locking mechanism further includes a plurality of locking screws, and the plurality of locking screws are screwed into the plurality of guiding cylinders one by one. The elastic member drives the head of the locking screw away from the mounting seat through elastic force to drive the locking member close to the mounting seat.

[0060] Optionally, on the side of the mounting seat facing away from the locking member, there are a plurality of mounting sleeves, and the mounting grooves are formed in the mounting sleeves.

[0061] Optionally, the mounting seat further has at least one first hinge portion, and the first hinge portion is hingedly connected to the cross bar or the movable connecting member.

[0062] Optionally, the first hinge portion includes a pair of first hinge plates spaced apart in the vehicle width direction. A first hinge hole is formed in the first hinge plate, and the cross bar is hingedly connected to the first hinge portion through a fastener passing through the first hinge hole and a connecting through hole on the cross bar.

[0063] The loading vehicle provided by the present utility model includes a plurality of independent folding units. Each folding unit has an outer frame rod group and a plurality of pairs of cross bars connected between the outer frame rod groups. Each pair of cross bars is cross - connected between the vertical rods of different outer frame rod groups. Thus, by moving the movable connecting member, changing the angle between the cross bars, and making the outer frame rod groups approach or move away from each other, each folding unit can be independently folded. Furthermore, the user can freely adjust the opening and folding states of the plurality of folding units according to the current usage requirements, thereby adjusting the overall capacity and the external dimensions of the loading vehicle, and improving the adaptability of the loading vehicle to various usage scenarios.

[0064] For example, when the loading vehicle is traveling in a narrow space, the user can fold a proper number of folding units and only use some of the folding units to load materials, so that the loading vehicle can pass through flexibly; when the amount of loaded materials is small and the number of children on board decreases, the user can also fold some of the folding units to make the capacity of the loading vehicle adapt to the volume of materials and the number of children, thereby improving the stability and safety during the loading and transportation process. Description of the Drawings

[0065] The present utility model will be further described below in conjunction with the drawings:

[0066] Figure 1 is a schematic structural diagram of the loading vehicle provided by an embodiment of the present utility model;

[0067] Figure 2 is a schematic structural diagram of the loading vehicle provided by an embodiment of the present utility model from another perspective;

[0068] Figure 3 is a schematic structural diagram of the loading vehicle provided by an embodiment of the present utility model when the expansion bar is opened;

[0069] Figure 4 is Figure 3 a partial enlarged schematic diagram of the loading vehicle in area A in ;

[0070] Figure 5 is Figure 3 a partial enlarged schematic diagram of the loading vehicle in area B in ;

[0071] Figure 6 is a schematic diagram of the folding principle of the loading vehicle provided by an embodiment of the present utility model;

[0072] Figure 7 is a schematic side view of the loading vehicle provided by an embodiment of the present utility model in the open state;

[0073] Figure 8 is a schematic side view of the loading vehicle provided by an embodiment of the present utility model in a partially folded state;

[0074] Figure 9 is Figure 8 a partial enlarged schematic diagram of the loading vehicle in area C in ;

[0075] Figure 10 is Figure 8 a partial enlarged schematic diagram of the loading vehicle in area D in ;

[0076] Figure 11 is a schematic diagram of the locking principle of the expansion bar in the loading vehicle provided by an embodiment of the present utility model;

[0077] Figure 12It is a schematic side view of the loading vehicle provided by the embodiment of the present utility model in the folded state;

[0078] Figure 13 It is a schematic view of the state where a part of the folding units of the loading vehicle provided by the embodiment of the present utility model are folded;

[0079] Figure 14 It is a schematic view of the state where another part of the folding units of the loading vehicle provided by the embodiment of the present utility model are folded;

[0080] Figure 15 It is a schematic view of the structure of the loading vehicle provided by the embodiment of the present utility model in the folded state;

[0081] Figure 16 It is a schematic view of the structure of the loading vehicle provided by another embodiment of the present utility model;

[0082] Figure 17 It is Figure 16 a schematic view of the state where part of the folding units of the loading vehicle in

[0083] Figure 18 It is Figure 16 a schematic view of the structure of the loading vehicle in the folded state in

[0084] Figure 19 It is a schematic view of the structure of the loading vehicle provided by another embodiment of the present utility model;

[0085] Figure 20 It is Figure 19 a schematic view of the state where part of the folding units of the loading vehicle in

[0086] Figure 21 It is Figure 19 a schematic view of the structure of the loading vehicle in the folded state in

[0087] Figure 22 It is a schematic view of the structure of the loading vehicle provided by another embodiment of the present utility model;

[0088] Figure 23 It is Figure 22 a schematic view of the state where part of the folding units of the loading vehicle in

[0089] Figure 24 It is Figure 22 a schematic view of the structure of the loading vehicle in the folded state in

[0090] Explanation of reference numerals:

[0091] Folding unit 100; outer frame rod group 110; vertical rod 111; movable connecting piece 112; cross rod 120; first traveling wheel 210; brake 211; second traveling wheel 220; extension bar 300; enclosure part 310; extension cross beam 311; adapter piece 312; insertion rod 320; extension connecting piece 400; extension mounting sleeve 410; extension hinge part 420; extension button 430; pressing end 431; driving end 432; fixing pin 440; extension elastic part 450; locking mechanism 500; locking block 501; first mating inclined surface a1; fixing ring 502; mounting seat 510; mounting sleeve 511; first hinge part 512; locking piece 520; mating groove 521; concave notch 522; guiding cylinder 523; second mating inclined surface a2; elastic part 530; locking screw 540; bottom support frame 600; bottom support frame 610; overlapping frame strip 611; horizontal frame strip 612; side frame strip 613; longitudinal frame strip 614; connecting strip 620; top cross beam 710; bottom cross beam 720; cross beam connecting piece 730; pull rod 800; first sleeve 810; fastening assembly 811; second sleeve 820; pull ring 830. Detailed implementation manners

[0092] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the implementation manners, it is intended to explain the present utility model and should not be construed as a limitation to the present utility model.

[0093] The "one embodiment" or "example" or "instance" cited in this specification means that the specific features, structures or characteristics described in connection with the embodiment itself can be included in at least one embodiment disclosed in the present utility model. The appearance of the phrase "in one embodiment" at various positions in the specification does not necessarily refer to the same embodiment.

[0094] Existing folding carts can usually only switch between a single folded state and a single opened state, and both the capacity and the external dimensions in the opened state are fixed values. The folding cart has a single usage mode, resulting in the lack of convenience of the cart in some environments. For example, it is not convenient to turn in the opened state in a narrow space. When the amount of materials to be transported is small, the internal space of the folding cart is too large, resulting in unstable fixation of the materials and easy collision. When the number of children sitting in the folding cart decreases, the children are difficult to borrow strength from the edge of the cart at the same time due to the large space, resulting in a reduction in the safety of children sitting, and so on. As a result, the existing folding carts cannot meet the various needs of consumers in different usage environments.

[0095] To solve the above technical problems, the present utility model provides a loading vehicle, such as Figures 1 to 3 , Figure 16 , Figure 19, Figure 22 As shown in the figure, the loading vehicle includes a plurality of interconnected folding units 100 and a plurality of traveling wheels provided at the bottom of the folding units 100. The folding unit 100 includes a pair of outer frame rod groups 110 and a plurality of pairs of cross rods 120. The outer frame rod group 110 includes a plurality of vertical rods 111. Each pair of cross rods 120 is cross - arranged and hinged to each other at the crossing point. The first ends of each pair of cross rods 120 are respectively movably connected to the vertical rods 111 in different outer frame rod groups 110, and the second ends of each pair of cross rods 120 are respectively movably connected to the vertical rods 111 in different outer frame rod groups 110. Moreover, the first end of one cross rod 120 in each pair of cross rods 120 and the second end of the other cross rod 120 are connected to the same vertical rod 111. The paired outer frame rod groups 110 can approach or move away from each other, so that the cross rods 120 between the outer frame rod groups 110 are folded and the space defined by the plurality of vertical rods 111 is contracted, or the cross rods 120 between the outer frame rod groups 110 are opened and the space defined by the plurality of vertical rods 111 is expanded.

[0096] The loading vehicle provided by the utility model includes a plurality of independent folding units 100. Each folding unit 100 has an outer frame rod group 110 and a plurality of pairs of cross rods 120 connected between the outer frame rod groups 110. Each pair of cross rods 120 is cross - connected between the vertical rods 111 of different outer frame rod groups 110, and both ends of the cross rod 120 are respectively movably connected to different vertical rods 111. Thus, by changing the angle between the cross rods 120 and making the outer frame rod groups 110 approach or move away from each other, each folding unit 100 can be independently folded. Furthermore, the user can freely adjust the open and folded states of the plurality of folding units 100 according to the current usage requirements, thereby adjusting the overall capacity and the external dimensions of the loading vehicle, and improving the adaptability of the loading vehicle to various usage scenarios.

[0097] For example, when the loading vehicle travels in a narrow space, the user can fold an appropriate number of folding units 100 and only use some folding units 100 to load materials, so that the loading vehicle can pass through flexibly; when the amount of loaded materials is less and the number of children on board decreases, the user can also fold some folding units 100 to make the capacity of the loading vehicle adapt to the volume of materials and the number of children, thereby improving the stability and safety during the loading and transportation process.

[0098] As an alternative embodiment of the utility model, as Figures 1 to 3 , Figures 7 to 8 , Figures 12 to 24 shown, a movable connecting piece 112 is movably arranged on the vertical rod 111. One of the first end and the second end of the cross rod 120 is hinged to the corresponding vertical rod 111, and the other is hinged to the movable connecting piece 112 on the corresponding vertical rod 111.

[0099] In the embodiment of the present utility model, one end of the cross bar 120 is directly hinged to the vertical bar 111, and the other end is connected to the vertical bar 111 through a movable connecting member 112. When the folding unit 100 is opened and folded, one end of the cross bar 120 remains hinged to the vertical bar 111, and only the size of the included angle changes. The other end ensures a stable connection relationship with the vertical bar 111 through the movable connecting member 112.

[0100] As an alternative embodiment of the present utility model, as Figures 1 to 3 , Figures 7 to 8 , Figures 12 to 15 shown, the movable connecting member 112 is slidably disposed on the corresponding vertical bar 111.

[0101] In the embodiment of the present utility model, one end of the cross bar 120 is hinged to the vertical bar 111, and the other end is hinged to the slidably disposed movable connecting member 112, so that it can move along the vertical bar 111 at one end while rotating, realizing the folding function. Specifically, when it is necessary to fold one side of the folding unit 100, as Figure 13 , Figure 14 shown, the outer frame bar groups 110 on both sides thereof can be folded towards the middle, so that the end of the cross bar 120 slides along the vertical bar 111 until the cross bar 120 rotates to a state parallel (or nearly parallel) to the vertical bar 111.

[0102] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the movable connecting member 112 is located below the hinged position of the vertical bar 111 and the corresponding cross bar 120, that is, the top end of the cross bar 120 is hinged to the vertical bar 111, and the bottom end of the cross bar 120 is hinged to the movable connecting member 112.

[0103] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the top end of the cross bar 120 is hinged to the top end of the vertical bar 111.

[0104] As another alternative embodiment of the present utility model, as Figures 16 to 18 shown, the movable connecting member 112 extends in the same direction as the vertical bar 111. The vertical bar 111 has a hollow mating hole inside, and the movable connecting member 112 is disposed in the hollow mating hole and can slide along the hollow mating hole.

[0105] In the embodiment of the present utility model, the vertical bar 111 is a hollow structure and together with the movable connecting member 112 forms a telescopic rod design. The movable connecting member 112 and the vertical bar 111 can slide relative to each other as the cross bar 102 is folded or opened. The two ends of the cross bar 120 are respectively hinged to the vertical bars 111 and the movable connecting members 112 on different sides, so that it can change the length of the telescopic rod by folding or pulling the telescopic rod while rotating, and the length of the telescopic rod changes with the angle change of the cross bar 120, realizing the folding function.

[0106] Specifically, when it is necessary to fold one side of the folding unit 100, as Figure 17 shown, the outer frame rod groups 110 on both sides thereof can be folded towards the middle, so that the movable connecting members 112 extend out of the vertical rods 111. At this time, the telescopic rod automatically elongates to adapt to the height change caused by the erection of the cross rods 120 until the cross rods 120 rotate to a state parallel (or nearly parallel) to the vertical rods 111.

[0107] As another alternative embodiment of the present invention, the movable connecting member 112 can be a connecting rod structure connected between the movable connecting member 112 and the corresponding vertical rod 111. Specifically, as Figures 19 to 21 shown, the first end of the cross rod 120 is hinged to the corresponding vertical rod 111, and both ends of the movable connecting member 112 are respectively hinged to the second end of the corresponding cross rod 120 and the corresponding vertical rod 111; or,

[0108] as Figures 22 to 24 shown, the second end of the cross rod 120 is hinged to the corresponding vertical rod 111, and both ends of the movable connecting member 112 are respectively hinged to the first end of the corresponding cross rod 120 and the corresponding vertical rod 111.

[0109] Optionally, the first end of the cross rod 120 is the top end in the use state (i.e., the upward end in the figure), and the second end of the cross rod 120 is the bottom end in the use state (i.e., the downward end in the figure).

[0110] In the embodiment of the present invention, one end of the cross rod 120 is movably connected to the vertical rod 111, and the other end is movably connected to the corresponding vertical rod 111 through the movable connecting member 112. Thus, during the opening and folding process of the folding unit 100, the height change of the end of the cross rod 120 during rotation can be adapted through the angle change between the movable connecting member 112 and the cross rod 120, realizing the folding function.

[0111] Specifically, when it is necessary to fold one side of the folding unit 100, as Figure 20 、 Figure 23 shown, the outer frame rod groups 110 on both sides thereof can be folded towards the middle, so that the upper and lower ends of the cross rod 120 approach each other. At this time, the connecting rod structure composed of the cross rod 120 and the movable connecting member 112 undergoes an adaptive attitude change as the two side vertical rods 111 approach each other until the cross rod 120 rotates to a state parallel (or nearly parallel) to the vertical rod 111.

[0112] Preferably, as Figures 22 to 24 shown, the end of the cross rod 120 at the bottom is movably connected to the corresponding vertical rod 111 through the movable connecting member 112, so that the space between the traveling wheels can be used to accommodate the movable connecting member 112, simplifying the top structure of the loading vehicle.

[0113] As an alternative embodiment of the present utility model, as shown in Figures 1 to 3 , Figure 16 , Figure 19 , Figure 22 , a plurality of folding units 100 are sequentially connected along the vehicle length direction l, and each pair of outer frame rod groups 110 of the folding unit 100 are symmetrically arranged along the vehicle length direction l.

[0114] As an alternative embodiment of the present utility model, when a movable connecting piece 112 is connected to the bottom end of the cross bar 120, as shown in Figures 22 to 24 , the movable connecting piece 112 at one end of the loading vehicle along the vehicle length direction l is hingedly connected to the corresponding traveling wheel structure, so as to realize the hinged connection between the bottom end of the corresponding cross bar 120 and the bottom end of the vertical bar 111.

[0115] As an alternative embodiment of the present utility model, the loading vehicle further includes a storage pocket (not shown in the figure), the storage pocket includes a fence and a bottom sheet, the fence is arranged around the space defined by the plurality of folding units 100, and the bottom sheet is connected to the bottom of the fence and seals the bottom opening of the fence.

[0116] It is easy to understand that the fence can be fixed to the outer frame rod group 110 in various ways. For example, optionally, the top of the fence has a mounting hole, and the mounting hole is sleeved on the vertical bar 111. Or, the fence is provided with straps, and the fence is fixed to the outer frame rod group 110 through the straps.

[0117] Optionally, the material of the fence can be cloth.

[0118] As an alternative embodiment of the present utility model, the storage pocket may further include at least one partition piece (not shown in the figure), the partition piece is arranged between the spaces defined by adjacent folding units 100, and separates the spaces defined by adjacent folding units 100, so that the spaces corresponding to different folding units 100 can be independently loaded with different materials.

[0119] As an alternative embodiment of the present utility model, as shown in Figures 1 to 3 , the traveling wheels include at least one first traveling wheel 210 arranged on one side of the loading vehicle along the vehicle length direction l and a plurality of second traveling wheels 220 arranged on the other side of the loading vehicle along the vehicle length direction l. That is, in the embodiment of the present utility model, the loading vehicle is provided with traveling wheels only at both the front and rear ends, and at least three traveling wheels are provided in total front and rear to maintain the stability of the loading vehicle.

[0120] As an alternative embodiment of the present utility model, the first traveling wheel 210 is a universal wheel, and the second traveling wheel 220 is a fixed-direction wheel, or the first traveling wheel 210 is a fixed-direction wheel and the second traveling wheel 220 is a universal wheel. That is, when there is only a single traveling wheel provided at the head or tail of the loading vehicle, the single traveling wheel can be a universal wheel for steering or a fixed-direction wheel.

[0121] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the first traveling wheel 210 is a universal wheel, and the first traveling wheel 210 is provided at the bottom end of the vertical rod 111 on one side of the loading vehicle along the vehicle length direction l.

[0122] As an alternative embodiment of the present utility model, as Figure 1 shown, a brake 211 is provided on the first traveling wheel 210. The brake 211 can stop the first traveling wheel 210 from rotating when pressed on one side and allow the first traveling wheel 210 to rotate when pressed on the other side, thereby realizing the fixing function of the trolley brake 211.

[0123] For the convenience of the user to pull the loading vehicle, as a preferred embodiment of the present utility model, as Figures 1 to 3 shown, the loading vehicle further includes a pull rod 800. One end of the pull rod 800 is hinged to the folding unit 100 at one end along the vehicle length direction l. A pull ring 830 is provided at the other end of the pull rod 800. The user can pull the pull rod 800 through the pull ring 830, and further pull the loading vehicle to travel.

[0124] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the pull rod 800 is hinged to the folding unit 100 provided with a universal wheel. That is, the end provided with the universal wheel is taken as the head end of the loading vehicle, and the loading vehicle is steered by pulling the head of the loading vehicle.

[0125] As an alternative embodiment of the present utility model, as Figure 1 shown, the pull rod 800 includes a first sleeve 810 and a second sleeve 820. The first sleeve 810 is sleeved outside the second sleeve 820. The first end of the first sleeve 810 is hingedly connected to the loading vehicle. The first end of the second sleeve 820 is located inside the first sleeve 810. The second end of the second sleeve 820 is fixedly connected to the pull ring 830. The second sleeve 820 can slide in the first sleeve 810 to change the length of the pull rod 800.

[0126] In the embodiment of the present utility model, the pull rod 800 is designed as a telescopic rod, so that as Figure 6 、 Figures 7 to 8 、 Figure 12 、 Figure 15As shown, when the loading vehicle is folded, the pull rod 800 can be contracted to the shortest state, thereby reducing the folded volume of the loading vehicle while ensuring the use length of the pull rod 800, and ensuring the convenience for users to carry the loading vehicle when traveling.

[0127] As an alternative embodiment of the present invention, as Figure 1 shown, a fastening assembly 811 is provided on the first sleeve 810. The fastening assembly 811 can selectively lock the position of the second sleeve 820 in the first sleeve 810 to fix the length of the pull rod 800.

[0128] As an alternative embodiment of the present invention, as Figures 1 to 3 shown, the vertical rods 111 of the outer frame rod group 110 are symmetrically arranged along the vehicle width direction w, and the vehicle width direction w intersects with the vehicle length direction l.

[0129] Optionally, the vehicle width direction w is perpendicular to the vehicle length direction l.

[0130] In the embodiment of the present invention, the vertical rods 111 are arranged in pairs along the vehicle width direction w, and the folding unit 100 can be folded along the vehicle length direction l, so that as Figure 8 , Figure 13 , Figure 14 , Figure 20 , Figure 23 shown, the overall length of the loading vehicle along the vehicle length direction l can be changed by folding the folding units 100 at different positions. As Figure 12 , Figure 15 , Figure 21 , Figure 24 shown, after all the folding units 100 are folded, the overall loading vehicle is folded along the vehicle length direction l to reduce the space volume occupied by the loading vehicle during carrying and transportation.

[0131] It can be understood that only the case where the loading vehicle includes two folding units 100 is shown in the figure. In fact, the loading vehicle can include three, four, five, six or more folding units 100.

[0132] As an alternative embodiment of the present invention, as Figures 1 to 3 shown, each folding unit 100 includes a pair of outer frame rod groups 110 symmetrically arranged along the vehicle length direction l, and each outer frame rod group 110 includes a pair of vertical rods 111 symmetrically arranged along the vehicle width direction w. That is, each folding unit 100 includes two pairs of vertical rods 111 spaced along the vehicle length direction l, and the rectangular space defined between the two pairs of vertical rods 111 is the storage space corresponding to the folding unit 100.

[0133] As an alternative embodiment of the present utility model, the movable connecting member 112 includes a sliding sleeve and a sliding hinge portion. The sliding sleeve is sleeved on the corresponding vertical rod 111, and the sliding hinge portion is hingedly connected to the cross rod 120.

[0134] As an alternative embodiment of the present utility model, the sliding hinge portion includes a pair of sliding hinge plates spaced apart in the vehicle width direction w. A sliding hinge hole is formed in the sliding hinge plate, and the cross rod 120 is hingedly connected to the sliding hinge portion through a fastener passing through the sliding hinge hole and a connecting through hole on the cross rod 120.

[0135] To further improve the adjustability of the internal volume of the loading vehicle, as a preferred embodiment of the present utility model, at least part of the interior of the vertical rod 111 has a hollow mating hole. As Figures 1 to 3 shown, the loading vehicle further includes a plurality of extension bars 300. The extension bar 300 includes a surrounding portion 310 and a plurality of insertion rods 320. As Figure 3 shown, the top end of the insertion rod 320 is fixedly connected to the surrounding portion 310, and the bottom end of the insertion rod 320 is inserted into the hollow mating hole, so that the height of the surrounding portion 310 relative to the outer frame rod group 110 is adjustable.

[0136] In an embodiment of the present utility model, the loading vehicle further includes an extension bar 300. The extension bar 300 includes an insertion rod 320 telescopically disposed inside at least part of the vertical rod 111. The surrounding portion 310 supported by the top of the insertion rod 320 can be lifted and lowered as the insertion rod 320 telescopes. Thus, as Figure 3 、 Figure 7 shown, when the height of the goods exceeds the height of the vertical rod 111, the height of the top edge of the loading vehicle can be increased by raising the extension bar 300, further improving the adjustability of the internal volume of the loading vehicle, as well as the transportation stability and safety.

[0137] Optionally, when a movable connecting member 112 is provided in the hollow mating hole, the movable connecting member 112 is also a hollow structure, and the insertion rod 320 is inserted into the interior of the movable connecting member 112 to form a three-layer sleeve structure.

[0138] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the surrounding portion 310 includes an extension cross beam 311 extending in the vehicle width direction w and a plurality of adapter members 312. The adapter members 312 are arranged in pairs at both ends of each extension cross beam 311, and the extension cross beam 311 is connected to the top ends of the insertion rods 320 on both sides through the adapter members 312.

[0139] As an alternative embodiment of the present utility model, the storage pocket further includes an extension sleeve (not shown in the figure). The extension sleeve is disposed around the space defined by the plurality of folding units 100, and the bottom opening of the extension sleeve is connected to the top opening of the enclosure, and the top of the extension sleeve is connected to the surrounding portion 310.

[0140] As an alternative embodiment of the present utility model, the expansion sleeve can be made of a mesh material to reduce the volume occupied by the expansion sleeve in the folded state and reduce the damage to the expansion sleeve caused by the folding action.

[0141] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, at least part of the vertical rod 111 is fixedly provided with an expansion connecting member 400. The expansion connecting member 400 is hingedly connected to the first end of the corresponding cross rod 120 (the two can be directly hinged or hingedly connected through a movable connecting member 112). The expansion connecting member 400 can also selectively fix the position of the insertion rod 320 in the hollow mating hole so as to fix the expansion bar 300 in the raised state and ensure the stability of the position of the expansion bar 300.

[0142] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, expansion connecting members 400 are fixedly provided on the vertical rods 111 at both ends along the vehicle length direction l.

[0143] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the loading vehicle further includes a plurality of top cross beams 710. The expansion connecting members 400 between each pair of vertical rods 111 are fixedly connected through the top cross beams 710, and the width of the loading vehicle is maintained through the top cross beams 710.

[0144] As an alternative embodiment of the present utility model, the top of one side of the enclosure passing over the top cross beam 710 has a connecting inner hole, and the top cross beam 710 passes through the connecting inner hole in the enclosure to fix the height position of the enclosure, that is, the top of the cloth enclosure is sleeved on the top cross beam 710.

[0145] As an alternative embodiment of the present utility model, as Figures 3 to 4 , Figure 8 , Figure 10 , Figure 11 shown, the expansion connecting member 400 includes an expansion mounting sleeve 410, an expansion hinge portion 420, an expansion button 430, a fixing pin 440, and an expansion elastic member 450. The expansion mounting sleeve 410 is sleeved on the vertical rod 111. The expansion hinge portion 420 is located on the expansion mounting sleeve 410, and the expansion hinge portion 420 is hingedly connected to the first end of the corresponding cross rod 120 (the two can be directly hinged or hingedly connected through a movable connecting member 112). The expansion mounting sleeve 410 has a first avoidance hole communicating with its interior. The expansion button 430 has a pressing end 431 and a driving end 432, and the expansion button 430 is hinged to the expansion mounting sleeve 410 at a position between the pressing end 431 and the driving end 432. One end of the fixing pin 440 is connected to the driving end 432, and the other end passes through the first avoidance hole;

[0146] The plugging rod 320 has at least one mating pin hole. The expansion elastic member 450 can drive the pressing end 431 of the expansion button 430 away from the vertical rod 111 through elastic force, so that the driving end 432 approaches the vertical rod 111 and drives the fixing pin 440 into the mating pin hole, and fixes the position of the plugging rod 320 in the hollow mating hole.

[0147] In the embodiment of the present utility model, the expansion button 430 adopts a lever structure. The expansion elastic member 450 drives the fixing pin 440 of the driving end 432 to insert into the inside of the expansion mounting sleeve 410 by lifting the pressing end 431 of the expansion button 430. Thus, when the mating pin hole on the plugging rod 320 corresponds to the position of the first avoidance hole of the expansion mounting sleeve 410, the fixing pin 440 will automatically insert into the mating pin hole to fix the height of the plugging rod 320, and further lock the position of the expansion bar 300. When it is necessary to retract the expansion bar 300, the user can press the pressing end 431 of the expansion button 430 to lift the driving end 432 and take out the fixing pin 440 to unlock the plugging rod 320. At the same time, press the expansion bar 300 to retract the plugging rod 320 into the hollow mating hole of the vertical rod 111.

[0148] As an alternative embodiment of the present utility model, the plugging rod 320 has a plurality of mating pin holes, so that the lifting height of the expansion sleeve can be adjusted in gears.

[0149] As an alternative embodiment of the present utility model, the expansion hinge portion 420 includes a pair of expansion hinge plates spaced apart along the vehicle width direction w. Expansion hinge holes are formed in the expansion hinge plates. The cross bar 120 is hingedly connected to the expansion hinge portion 420 through a fastener passing through the expansion hinge holes and the connection through holes on the cross bar 120.

[0150] As an alternative embodiment of the present utility model, as Figure 4 shown, the expansion mounting sleeve 410 has a button groove. The first avoidance hole communicates the button groove with the inside of the expansion mounting sleeve 410. The expansion button 430 is arranged in the button groove, and the expansion button 430 is hinged to the side wall of the button groove.

[0151] As an alternative embodiment of the present utility model, as Figure 10 、 Figure 11 shown, the vertical rod 111 has a second avoidance hole penetrating from the outer surface of the vertical rod 111 to the hollow mating hole. The position of the first avoidance hole corresponds to the position of the second avoidance hole, that is, the fixing pin 440 sequentially passes through the first avoidance hole of the expansion mounting sleeve 410 and the second avoidance hole of the vertical rod 111 and inserts into the mating pin hole.

[0152] To improve the load capacity of the loading vehicle, as an alternative embodiment of the present utility model, as Figures 1 to 3As shown, the folding unit 100 further includes a bottom support frame 600. The bottom support frame 600 is connected between the bottom ends of the outer frame rod group 110 of the folding unit 100, and the bottom support frame 600 can be folded when the outer frame rod group 110 approaches each other, and can be unfolded when the outer frame rod group 110 moves away from each other, and is erected between the outer frame rod group 110.

[0153] As an alternative embodiment of the present invention, as Figures 1 to 3 shown, the loading vehicle further includes a plurality of bottom cross beams 720. Between the bottom ends of at least one pair of vertical rods 111 of at least one bottom support frame 610 in each folding unit 100, they are fixedly connected through the bottom cross beam 720.

[0154] As an alternative embodiment of the present invention, as Figures 1 to 3 shown, the bottom support frame 600 includes a bottom support frame 610 and connecting bars 620 arranged in pairs on both sides of the bottom support frame 610. The first end of the bottom support frame 610 is hinged to the bottom end of the outer frame rod group 110 on one side. The second end of the bottom support frame 610 can be placed on the corresponding bottom cross beam 720 of the outer frame rod group 110 on the opposite side when the folding unit 100 is unfolded. One end of the connecting bar 620 is hinged to the bottom end of the outer frame rod group 110 on the opposite side, and the other end of the connecting bar 620 is hinged to the part between the first end and the second end of the bottom support frame 610.

[0155] As an alternative embodiment of the present invention, as Figure 3 shown, the bottom support frame 610 includes a lapping frame bar 611, a horizontal frame bar 612, and a pair of side frame bars 613. The first end of the side frame bar 613 forms the first end of the bottom support frame 610. The second ends of the side frame bars 613 are respectively fixedly connected to both ends of the horizontal frame bar 612. The lapping frame bar 611 is used to be placed on the bottom cross beam 720. The end of the connecting bar 620 is hinged to the part between the first end and the second end of the side frame bar 613. The horizontal frame bar 612 is connected between the side frame bars 613.

[0156] As an alternative embodiment of the present invention, as Figure 3 shown, the bottom support frame 610 further includes at least one longitudinal frame bar 614. Both ends of the longitudinal frame bar 614 are respectively fixedly connected to the lapping frame bar 611 and the horizontal frame bar 612.

[0157] As an alternative embodiment of the present invention, as Figure 1 shown, the first traveling wheel 210 is a universal wheel. The bottom cross beam 720 corresponding to the first traveling wheel 210 has a concave portion formed by downward bending in the central region, and the pull rod 800 is hingedly connected to the concave portion.

[0158] As an alternative embodiment of the present invention, as Figures 1 to 3As shown, the loading vehicle further includes a plurality of crossbeam connectors 730. The bottom ends of adjacent vertical rods 111 of adjacent folding units 100 are connected to each other through the crossbeam connectors 730, and the crossbeam connectors 730 on both sides are connected to each other through the bottom crossbeam 720.

[0159] As an alternative embodiment of the present utility model, when a movable connector 112 is connected to the bottom end of the crossbar 120, as Figures 22 to 24 shown, the bottom end of the crossbar 120 is hingedly connected to the crossbeam connector 730 through the movable connector 112, so as to realize the hinged connection between the bottom end of the crossbar 120 and the bottom end of the vertical rod 111.

[0160] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the second traveling wheel 220 is a directional wheel, and the second traveling wheel 220 is arranged on the bottom crossbeam 720 on one side of the loading vehicle along the vehicle length direction l.

[0161] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the loading vehicle further includes a plurality of locking mechanisms 500 and a plurality of locking blocks 501. At least one vertical rod 111 in the folding unit 100 is provided with a locking mechanism 500, and at least one vertical rod 111 is provided with a locking block 501. The locking mechanism 500 can be latched with the locking block 501 when the folding unit 100 is folded, so as to keep the folding unit 100 in the folded state, and can also selectively release the locking block 501, so that the folding unit 100 can be unfolded.

[0162] In the embodiment of the present utility model, locking mechanisms 500 are provided on some vertical rods 111 of the folding unit 100, and locking blocks 501 are provided on some vertical rods 111. When the folding unit 100 is folded, the locking mechanism 500 and the locking block 501 come into contact with and latch with each other as the vertical rods 111 approach each other, so as to keep the folding unit 100 in the folded state and ensure the structural stability of the folding unit 100 in the folded state.

[0163] As an alternative embodiment of the present utility model, as Figures 1 to 3 shown, the locking block 501 is located on the expansion connector 400.

[0164] As an alternative embodiment of the present utility model, as Figure 3 、 Figure 5 shown, a fixing ring 502 is provided on the locking mechanism 500, and a plurality of fixing buckles (not shown in the figure) are provided on the enclosure. The fixing buckles pass through the fixing ring 502 and are connected to the fixing ring 502 to connect the enclosure to the locking mechanism 500.

[0165] In the case where the vertical rod 111 is designed as a telescopic rod, as Figures 16 to 18As shown, the vertical rods 111 of adjacent folding units 100 can be independently telescoped. At this time, a binding block 503 can be provided on the locking mechanism 500. A binding strap is provided at the corner of the storage pocket of each folding unit 100 corresponding to the binding block 503. The two corners of the top of the storage pocket corresponding to the locking mechanism 500 can be connected to the locking mechanism 500 through the binding straps tied to the binding block 503.

[0166] As an alternative embodiment of the present invention, as Figure 3 、 Figure 5 、 Figures 8 to 9 shown, the locking mechanism 500 includes a mounting base 510, a locking member 520, and an elastic member 530. The locking mechanism 500 is provided at the top of the connection between adjacent folding units 100, and the mounting base 510 is fixedly connected to the top ends of the vertical rods 111 of the adjacent folding units 100. The locking member 520 has a locking surface on the side facing the mounting base 510, and a mating groove 521 is provided on the locking surface. The elastic member 530 is used to drive the locking member 520 to approach the mounting base 510 by an elastic force;

[0167] The locking block 501 can enter and be engaged in the mating groove 521 when the corresponding folding unit 100 is folded, so as to keep the corresponding folding unit 100 in the folded state; the locking member 520 can release the locking block 501 in the mating groove 521 when being pulled away from the mounting base 510 by an external force, so as to allow the folding unit 100 to be unfolded.

[0168] As an alternative embodiment of the present invention, as Figure 3 、 Figure 5 shown, the locking member 520 has a concave notch 522 along one side edge perpendicular to the extending direction of the mating groove 521, so as to reduce the width dimension of the locking member 520 and facilitate the user's grasping.

[0169] To facilitate the automatic entry of the locking block 501 into the mating groove 521, as a preferred embodiment of the present invention, as Figures 9 to 11 shown, the locking block 501 has a first mating inclined surface a1 for contacting the locking member 520. There is an included angle between the first mating inclined surface a1 and the direction in which the locking block 501 enters the mating groove 521, and the first mating inclined surface a1 can push the locking member 520 away from the mounting base 510 during the process of the locking block 501 entering the mating groove 521.

[0170] To further facilitate the automatic entry of the locking block 501 into the mating groove 521, as a preferred embodiment of the present invention, as Figure 9 shown, the thickness of the locking member 520 gradually decreases near the edge, and a second mating inclined surface a2 is formed at the edge of the locking surface.

[0171] As an alternative embodiment of the present invention, as Figure 9As shown in the figure, on the side of the mounting base 510 facing away from the locking member 520, there are a plurality of mounting grooves. The ends of the vertical rods 111 of adjacent folding units 100 are fixedly arranged in the mounting grooves, and the bottom of the mounting groove has a guiding avoidance hole penetrating through to the other surface of the mounting base 510.

[0172] The locking member 520 is provided with a pair of guiding cylinders 523. The guiding cylinders 523 pass through the plurality of guiding avoidance holes one by one and enter the plurality of vertical rods 111. The elastic member 530 is a spring. The elastic member 530 is sleeved on the guiding cylinder 523. The locking mechanism 500 further includes a plurality of locking screws 540. The plurality of locking screws 540 are screwed into the plurality of guiding cylinders 523 one by one. The elastic member 530 drives the head of the locking screw 540 away from the mounting base 510 through elastic force, so as to drive the locking member 520 closer to the mounting base 510.

[0173] As an alternative embodiment of the present utility model, as Figure 9 shown, on the side of the mounting base 510 facing away from the locking member 520, there are a plurality of mounting sleeves 511, and the mounting grooves are formed in the mounting sleeves 511.

[0174] As an alternative embodiment of the present utility model, as Figure 9 shown, the mounting base 510 is further provided with at least one first hinge portion 512, and the first hinge portion 512 is hingedly connected to the cross bar 120 or the movable connecting member 112.

[0175] As an alternative embodiment of the present utility model, the first hinge portion 512 includes a pair of first hinge plates spaced apart along the vehicle width direction w. A first hinge hole is formed in the first hinge plate. The cross bar 120 is hingedly connected to the first hinge portion 512 through a fastener passing through the first hinge hole and the connection through hole on the cross bar 120. Or, when the cross bar 120 is hingedly connected to the first hinge portion 512 through the movable connecting member 112, the movable connecting member 112 is hingedly connected to the first hinge portion 512 through a fastener passing through the first hinge hole and the connection through hole on the cross bar 120.

[0176] For the convenience of understanding, as Figure 6 shown is an analysis schematic diagram of the folding action of the loading vehicle structure provided by an embodiment of the present utility model. When folding the loading vehicle, the user can (after pressing the expansion button 430) press the expansion bar 300 downward to make it contract, lift the bottom support frame 610, so that the bottom support 600 folds, and drive the vertical rods 111 of the corresponding folding units 100 to fold along the vehicle length direction l until the locking mechanism 500 and the locking block 501 come into contact and engage with each other, (press the fastening assembly 811) contract the pull rod 800 and rotate it to fit with the folding unit 100, and finally reach Figure 12 、 Figure 15 the state shown.

[0177] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the content described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present utility model will be included in the scope of the claims.

Claims

1. A loading vehicle, characterized in that: The invention comprises a plurality of folding units connected to each other and a plurality of travelling wheels arranged at the bottom of the folding units, the folding units comprise outer frame rod groups and a plurality of pairs of cross rods arranged in pairs, the outer frame rod groups comprise a plurality of vertical rods, each pair of the cross rods are cross-arranged and hinged to each other at the intersection, the first end of each pair of the cross rods are movably connected to the vertical rods in different outer frame rod groups, the second end of each pair of the cross rods are movably connected to the vertical rods in different outer frame rod groups, and the first end of one cross rod in each pair of the cross rods is connected to the same vertical rod with the second end of the other cross rod, the paired outer frame rod groups can approach or move away from each other, so that the cross rods between the outer frame rod groups can be folded and the space defined by the plurality of vertical rods can be contracted, or the cross rods between the outer frame rod groups can be opened and the space defined by the plurality of vertical rods can be expanded.

2. The loading vehicle according to claim 1, characterized in that: A movable connecting piece is movably arranged on the vertical rod, one of the first end and the second end of the cross rod is hingedly connected to the corresponding vertical rod, and the other is hingedly connected to the movable connecting piece on the corresponding vertical rod.

3. The loading vehicle according to claim 2, characterized in that: The movable connecting piece is slidably arranged on the corresponding vertical rod.

4. The loading vehicle according to claim 2, characterized in that: The movable connecting piece and the vertical rod extend in the same direction. The vertical rod has a hollow matching hole inside. The movable connecting piece is arranged in the hollow matching hole and can slide along the hollow matching hole.

5. The loading vehicle according to claim 2, characterized in that: The first end of the cross rod is hinged to the corresponding vertical rod, and the two ends of the movable connecting member are respectively hinged to the second end of the corresponding cross rod and the corresponding vertical rod; or, The second end of the cross rod is hinged to the corresponding vertical rod, and the two ends of the movable connecting member are respectively hinged to the first end of the corresponding cross rod and the corresponding vertical rod.

6. The loading vehicle according to any one of claims 1 to 5, characterized in that: The plurality of folding units are connected in sequence along the vehicle length direction, and each pair of the outer frame rod groups of the folding units are symmetrically arranged along the vehicle length direction; the vertical rods of the outer frame rod groups are symmetrically arranged along the vehicle width direction, and the vehicle width direction intersects with the vehicle length direction.

7. The loading vehicle according to any one of claims 1 to 5, characterized in that: At least part of the vertical rods have hollow matching holes inside; the loader also includes a plurality of extension bars, each of which includes an enclosure and a plurality of plug-in rods, the top ends of the plug-in rods are fixedly connected to the enclosure, and the bottom ends of the plug-in rods are inserted into the hollow matching holes, so that the height of the enclosure relative to the outer frame rod group can be adjusted.

8. The loading vehicle according to claim 7, characterized in that: An extended connector is fixedly provided on at least part of the vertical rods, and the extended connector is hingedly connected to the first end of the corresponding cross rod. The extended connector can also selectively fix the position of the plug-in rod in the hollow matching hole.

9. The loading vehicle according to claim 8, characterized in that: The expansion connector comprises an expansion sleeve, an expansion hinge, an expansion button, a fixing pin and an expansion elastic member, wherein the expansion sleeve is sleeved on the vertical rod, the expansion hinge is located on the expansion sleeve, and the expansion hinge is hingedly connected to the first end of the corresponding cross rod, the expansion sleeve has a first avoidance hole communicating with the interior thereof, the expansion button has a pressing end and a driving end, and the expansion button is hingedly connected to the expansion sleeve at a position between the pressing end and the driving end, one end of the fixing pin is connected to the driving end, and the other end passes through the first avoidance hole; The plug-in rod is provided with at least one mating pin hole, and the expansion elastic member can drive the pressing end of the expansion button away from the vertical rod through elastic force, so that the driving end is close to the vertical rod and drives the fixing pin to enter the mating pin hole and fix the position of the plug-in rod in the hollow mating hole.

10. The loading vehicle according to any one of claims 1 to 5, characterized in that: The folding unit also includes a bottom support frame, which is connected between the bottom ends of the outer frame rod groups of the folding unit, and the bottom support frame can be folded when the outer frame rod groups approach each other, and unfolded when the outer frame rod groups move away from each other, and is erected between the outer frame rod groups.

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