Trolley chassis, trolley frame and flat folding trolley

Abstract

The utility model relates to a trolley chassis, a trolley frame and a flat folding trolley. The technical problem that an existing flat folding trolley is not high in structural strength is solved. Comprising a horizontally-arranged frame-shaped bottom frame body, the bottom frame body is provided with two movably-connected bottom frame half bodies, and the ends, away from each other, of the two bottom frame half bodies are rotating ends; the ends, close to each other, of the two bottom frame half bodies are connected through a flat folding movable connecting structure which can enable the two bottom frame half bodies to be folded upwards in the vertical direction located at the connecting position of the two bottom frame half bodies under the action of external force, and the width of the bottom frame bodies is not changed in the folding process. The lower end of the bottom frame body is provided with a plane rotation cross supporting structure used for bearing the bottom frame body. The frame has the advantages that the front support and the rear support are connected through the bottom frame, the overall bearing capacity of the frame can be improved, and the bearing capacity of the frame can be further improved through the plane rotation cross supporting structure arranged at the lower end of the bottom frame.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolleys, and in particular relates to a trolley underframe, a frame and a flat-folding trolley. Background Art

[0002] The handcart is a transport vehicle that is pushed and pulled by manpower, and the handcart has the advantages of low cost, simple maintenance, convenient operation, light weight, etc., and can work in places where motor vehicles are inconvenient to use, and is widely used by people; the handcarts currently on the market have foldable handcarts for the convenience of people to store and place, and the existing foldable handcarts mainly include gathering folding and flat folding, among which the gathering folding folding handcart has a low load-bearing capacity and low structural strength, which affects the user experience in complex environments; and the flat folding folding handcart has a higher load-bearing capacity than the folding handcart, and has a high structural strength, and can be used in complex environments; however, the wheel body of the existing flat folding handcart is prone to peeling out when carrying objects in the loading process, which affects the normal operation of the wheel body and the user experience; and in order to improve the folding effect, the structural strength of the existing flat folding handcart is reduced. Summary of the invention

[0003] The purpose of the utility model is to provide a trolley chassis in view of the above problems.

[0004] Another object of the present invention is to provide a frame to solve the above problems.

[0005] Another object of the present invention is to provide a flat-folding trolley in view of the above-mentioned problem.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a wheelbarrow chassis, including a horizontally arranged and frame-shaped chassis body, the chassis body having two movably connected chassis halves, the ends of the two chassis halves away from each other are rotating ends, and the ends of the two chassis halves close to each other are connected by a flat-folding movable connection structure which can enable the two chassis halves to fold upward toward the vertical direction located at the connection between the two chassis halves under the action of external force, and the width of the chassis body remains unchanged during the folding process; the lower end of the chassis body is provided with a plane rotating cross-support structure for supporting the chassis body, and the chassis body can be further supported by the plane rotating cross-support structure to ensure the load-bearing effect.

[0007] In the above-mentioned trolley chassis, the two chassis halves have the same structure and size and are both frame-shaped structures. Each chassis half includes two chassis longitudinal tubes which are arranged in parallel with each other and extend along the length direction of the chassis. Two chassis transverse tubes which are arranged in parallel with each other and extend along the width direction of the chassis are arranged between the chassis longitudinal tubes, and a number of mutually parallel reinforcing longitudinal tubes are arranged between the two chassis transverse tubes. The structural strength of the chassis half can be improved by the chassis transverse tubes and the reinforcing longitudinal tubes, and the carrying capacity can be improved.

[0008] In the above-mentioned trolley chassis, the planar rotating cross-support structure includes at least one group of planar rotating cross-support tube groups, each group of planar rotating cross-support tube groups includes upper support tubes and lower support tubes which are horizontally arranged and not located on the same horizontal plane, the upper support tubes and lower support tubes are distributed in a V-shape, one end of the upper support tube is located above the lower support tube and is rotatably connected to one end of the lower support tube through a plug-in rotating assembly, and the other end of the upper support tube is bent. The plug-in rotating assembly can improve the supporting stability of the upper support tube and the lower support tube in the supporting state, ensure the supporting effect, and facilitate the folding of the upper support tube and the lower support tube to ensure the folding efficiency.

[0009] In the above-mentioned trolley chassis, the ends of the upper support tube and the lower support tube that are close to each other cross each other and are connected in a horizontal direction, and the connection between the upper support tube and the lower support tube and the connection between the two chassis halves are located in the same straight line along the width direction of the chassis body. The upper support tube has a horizontal support portion that is rotatably connected to the lower support tube, and one side of the horizontal support portion rests on the lower side of the chassis body. The end of the horizontal support portion away from the lower support tube is connected to the horizontally arranged horizontal connecting portion through an inclined portion that extends downward obliquely, and the upper support tube can be supported and rested against the chassis body through the horizontal support portion, thereby ensuring the supporting effect on the chassis body, and the upper support tube can be easily folded and placed through the inclined portion and the horizontal connecting portion, thereby improving the folding efficiency.

[0010] In the above-mentioned trolley chassis, the planar rotating cross-support structure has two groups of planar rotating cross-support tube groups, and the upper support tubes and lower support tubes of the two groups of planar rotating cross-support tube groups cross each other to form an X shape, the upper support tubes in the two groups of planar rotating cross-support tube groups are located on the same horizontal plane and the ends are staggered so as to connect the two diagonals of the chassis, and the lower support tubes in the two groups of planar rotating cross-support tube groups are located on the same horizontal plane and the ends are staggered so as to connect the other two diagonals of the chassis. The end staggered setting can facilitate the two groups of planar rotating cross-support tube groups to stretch or fold, thereby ensuring folding efficiency and support stability.

[0011] In the above-mentioned trolley chassis, the plug-in rotating assembly includes a plug-in column arranged at one end of the horizontal supporting portion of the upper support tube, and one end of the lower support tube is arranged on a plug-in seat suitable for the plug-in column, and the plug-in column is rotatably plugged into the plug-in seat, and the upper support tube and one end of the lower support tube can be fixedly connected through the plug-in column and the plug-in seat, and the upper support tube and the lower support tube can be folded conveniently, and the adjacent plug-in seats can play a limiting abutment role, and the support efficiency of the lower support tube can be guaranteed through the plug-in seat and the plug-in column, and the support stability of the chassis body can be further improved.

[0012] In the above-mentioned trolley chassis, the flat-folding movable connection structure includes two folding joints arranged between the corresponding ends of the two chassis halves, the folding joint has a first joint half connected to the end of the chassis longitudinal tube in one of the chassis halves and a second joint half connected to the end of the chassis longitudinal tube in the remaining chassis half, the first joint half and the second joint half are connected by a rotation pin shaft, a locking hole for inserting a locking pin is provided on the first joint half, and an arc-shaped recess corresponding to the locking pin is provided on the inner side of the second joint half, the first joint half and the second joint half can be rotatably connected by the locking pin passing through the locking hole and the arc-shaped recess, so as to facilitate the folding of the chassis halves.

[0013] A frame of a wheelbarrow chassis, including a frame body having a front bracket and a rear bracket arranged vertically opposite to each other, a chassis body is arranged between the front bracket and the rear bracket, the rotating ends of the two chassis halves of the chassis body are respectively connected to the front bracket and the rear bracket for rotation, and a plane rotating cross support structure is arranged between the front bracket and the rear bracket and is located at the lower end of the chassis body and is used to support the chassis body.

[0014] The camshaft of claim 1, wherein the two rails are connected along the longitudinal axis of the two support rails, the two rails having a plurality of camshafts that are each connected to a pair of camshafts that are each connected to a pair of camshafts.

[0015] A flat-folding handcart with a frame, comprising a frame body, a plurality of wheel bodies being provided at the lower end of the frame body, a handle being movably connected to the lower end of the front vertical tube of the front bracket being provided at the front end of the frame body, and two vertical columns being respectively located at the outside of the rear vertical tube and connected to the upper and lower ends of the rear vertical tube being provided on one side of the rear bracket, a handle being movably provided at the rear end of the frame body and connected to the upper ends of the vertical columns, a canopy bracket being provided above the frame body, the canopy bracket having four bracket columns which are vertically arranged and respectively plug-connected to the front vertical tube and the rear vertical tube, bracket cross bars being movably connected to the upper ends of the bracket columns, and the bracket cross bars all extend toward the center and above the bottom frame body and are all rotatably arranged on bracket connecting seats.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The front bracket and the rear bracket are connected through the bottom frame, which can improve the overall load-bearing capacity of the frame, and the plane rotating cross support structure arranged at the lower end of the bottom frame can further improve the load-bearing capacity of the frame.

[0018] 2. The half body of the chassis can be easily folded through the flat-folding movable connection structure, which can reduce the overall occupied area of ​​the frame and improve the user experience.

[0019] 3. The plane rotating cross support structure is connected to the base frame through a plug-in rotating assembly, which can ensure the connection stability between the plane rotating cross support structure and the base frame.

[0020] 4. The plane rotating cross support structure can be set to fold flat front and back to improve the folding efficiency, which is convenient for user operation and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the frame body in the first embodiment of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the frame body in the first embodiment of the utility model from another perspective.

[0024] Figure 4 It is a bottom view of the first embodiment of the present utility model.

[0025] Figure 5 It is a structural schematic diagram of the base frame in the first embodiment of the utility model.

[0026] Figure 6 It is a structural schematic diagram of the canopy support in the first embodiment of the utility model.

[0027] Figure 7 It is a structural schematic diagram of the second embodiment of the present utility model.

[0028] Figure 8 It is a structural schematic diagram of the third embodiment of the present utility model.

[0029] Fig. 9 It is a structural schematic diagram of the fourth embodiment of the present utility model.

[0030] Fig.10 It is a structural schematic diagram of the fifth embodiment of the present utility model.

[0031] Fig.11 It is a structural schematic diagram of embodiment 6 of the present utility model.

[0032] In the figure: chassis body 1, chassis half body 11, chassis longitudinal tube 111, chassis transverse tube 112, reinforcement longitudinal tube 113, rotating end 12, flat folding movable connection structure 2, folding joint 21, first joint half body 22, second joint half body 23, locking hole 24, plane rotating cross support structure 3, plane rotating cross support tube group 31, upper support tube 311, horizontal support part 3111, inclined part 3112, horizontal connection part 3113, lower support tube 312, upper support sleeve 313, lower support sleeve 314, plug-in rotating assembly 4, plug-in column 41, plug-in seat 42, frame body 5, front bracket 51, front vertical tube 511, upper front transverse tube 512, lower front transverse tube 513, chassis front connecting seat 514 , upper front riser connecting sleeve 515, lower front riser connecting sleeve 516, plug-in slot 517, rear bracket 52, rear riser 521, upper rear transverse tube 522, lower rear transverse tube 523, rear connecting seat 524 of chassis, upper rear riser connecting sleeve 525, lower rear riser connecting sleeve 526, wheel body 53, front wheel body 531, rear wheel body 532, wheel body connecting seat 533, wheel body connecting shaft 534, wheel body connecting sleeve 535, pedal part 536, handle 54, handle connecting seat 541, handle connecting rod 542, plug-in block 543, vertical column 55, handle 56, rotating part 57, rotating sleeve 6, canopy bracket 7, bracket column 71, bracket cross bar 72, bracket connecting seat 73, rear connecting pipe 8, front connecting pipe 9. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1As shown, a trolley chassis comprises a horizontally arranged and frame-shaped chassis body 1, the chassis body 1 having two movably connected chassis halves 11, the ends of the two chassis halves 11 that are away from each other are rotating ends 12, and the ends of the two chassis halves 11 that are close to each other are connected by a flat-folding movable connecting structure 2 which can enable the two chassis halves 11 to fold upward in a vertical direction at the connection between the two chassis halves 11 under the action of an external force, and the width of the chassis body 1 remains unchanged during the folding process. The flat-folding movable connecting structure 2 can facilitate the folding of the chassis halves 11, which is convenient for users to fold and place, reduces the floor space, and improves the user experience. A planar rotating cross-support structure 3 for supporting the chassis body 1 is provided at the lower end of the chassis body 1. The planar rotating cross-support structure 3 can further support the chassis body 1, which can further improve the bearing capacity of the chassis body 1 and ensure the bearing effect.

[0036] Specifically, the two chassis half bodies 11 have the same structure and size and are both frame-shaped structures, which facilitate the folding and placement of the chassis half bodies 11 and can ensure the structural stability of the chassis body 1. Each chassis half body 11 includes two chassis longitudinal tubes 111 that are arranged parallel to each other and extend along the length direction of the chassis body 1. Two chassis cross tubes 112 that are arranged parallel to each other and extend along the width direction of the chassis body 1 are arranged between the chassis longitudinal tubes 111. The connection stability of the two parallel chassis longitudinal tubes 111 can be improved through the bottom cross tube 112, and a number of mutually parallel reinforcing longitudinal tubes 113 are arranged between the two chassis cross tubes 112. The structural strength of the chassis half body 11 can be improved through the chassis cross tube 112 and the reinforcing longitudinal tubes 113, and the load-bearing capacity can be improved.

[0037] Among them, the planar rotating cross support structure 3 includes at least one group of planar rotating cross support tube groups 31, and each group of planar rotating cross support tube groups 31 includes an upper support tube 311 and a lower support tube 312 which are horizontally arranged and not located on the same horizontal plane. The upper support tube 311 and the lower support tube 312 are arranged in a V-shape, which can facilitate the folding of the upper support tube 311 and the lower support tube 312 to improve the folding efficiency. One end of the upper support tube 311 is located above the lower support tube 312 and is rotatably connected to one end of the lower support tube 312 through a plug-in rotating component 4. The other end of the upper support tube 311 is bent. The plug-in rotating component 4 can improve the support stability of the upper support tube 311 and the lower support tube 312 in the supporting state, ensure the support effect, and facilitate the folding of the upper support tube 311 and the lower support tube 312 to ensure the folding efficiency.

[0038] like Figure 1 , Figure 4The cam 312 is provided with a plurality of support members 311a and 312b, respectively, which are used to support the base frame 1. The support members 311a and 312b are provided with a plurality of support members 311a and 312b, respectively, which are used to support the base frame 1. The support members 311a and 312b are provided to support the base frame 1. The support members 311a and 311b are provided to support the base frame 1.

[0039] Furthermore, the planar rotating cross support structure 3 has two groups of planar rotating cross support tube groups 31, and the upper support tubes 311 and the lower support tubes 312 of the two groups of planar rotating cross support tube groups 31 cross each other to form an X shape. The cross X shape can facilitate the upper support tubes 311 and the lower support tubes 312 to fold forward and backward, which is convenient for users to perform folding operations. The upper support tubes 311 in the two groups of planar rotating cross support tube groups 31 are located on the same horizontal plane and the ends are staggered so as to connect the two diagonals of the bottom frame body 1, and the lower support tubes 312 in the two groups of planar rotating cross support tube groups 31 are located on the same horizontal plane and the ends are staggered so as to connect the other two diagonals of the bottom frame body 1. The end staggered setting can facilitate the two groups of planar rotating cross support tube groups 31 to stretch or fold, thereby ensuring folding efficiency and support stability.

[0040] Among them, the plug-in rotating component 4 includes a plug-in column 41 arranged at one end of the horizontal support part 3111 of the upper support tube 311, and one end of the lower support tube 312 is arranged on a plug-in seat 42 suitable for the plug-in column 41. The plug-in column 41 is rotatably plugged into the plug-in seat 42. The upper support tube 311 and one end of the lower support tube 312 can be fixedly connected through the plug-in column 41 and the plug-in seat 42, and the upper support tube 311 and the lower support tube 312 can be folded conveniently, and the adjacent plug-in seats 42 can play a limiting abutment role, and the support efficiency of the lower support tube 312 can be guaranteed through the plug-in seat 42 and the plug-in column 41, and the support stability of the base frame 1 can be further improved.

[0041] like Figure 1 , Figure 4As shown, the flat-folding movable connection structure 2 includes two folding joints 21 arranged between the corresponding ends of the two chassis half bodies 11, and the folding joints 21 can facilitate the folding operation between the chassis half bodies 11. The folding joint 21 has a first joint half body 22 connected to the end of the chassis longitudinal tube 111 in one of the chassis half bodies 11 and a second joint half body 23 connected to the end of the chassis longitudinal tube 111 in the remaining chassis half body 11. The first joint half body 22 and the second joint half body 23 are connected by a rotating pin shaft, and the first joint half body 22 and the second joint half body 23 can be rotatably connected by the pin shaft. A locking hole 24 for inserting a locking pin is provided on the first joint half body 22, and an arc-shaped recess corresponding to the locking pin is provided on the inner side of the second joint half body 23. The locking pin that runs through the locking hole 24 and the arc-shaped recess 25 can make the first joint half body 22 and the second joint half body 23 rotatably connected, so as to facilitate the folding of the chassis half body 11.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a frame of a trolley chassis includes a frame body 5 having a front bracket 51 and a rear bracket 52 arranged vertically opposite to each other, a chassis body 1 is arranged between the front bracket 51 and the rear bracket 52, the rotating ends 12 of the two chassis half bodies 11 of the chassis body 1 are respectively connected to the front bracket 51 and the rear bracket 52 for rotation, a plane rotating cross support structure 3 located at the lower end of the chassis body 1 and used to support the chassis body 1 is arranged between the front bracket 51 and the rear bracket 52, and an upper support tube 311 is provided at one end away from the lower support tube 312 with an upper support sleeve 313 that is connected to the front bracket 51 or the rear bracket 52 The lower end of one side is horizontally connected for rotation, and the end of the lower support tube 312 away from the upper support tube 311 is provided with a lower support sleeve 314 which is horizontally connected to the lower end of the same side of the rear bracket 52 or the front bracket 51 for rotation, wherein the upper support sleeve 313 is connected to the upper support tube 311 by welding or as an integrated structure, and the lower support sleeve 314 is connected to the lower support tube 312 by welding or as an integrated structure, and the upper support tube 311 and the lower support tube 312 are both slidably set on the front bracket 51 or the rear bracket 52 through the upper support sleeve 313 and the lower support sleeve 314.

[0043] Specifically, the front bracket 51 has two vertically arranged front risers 511, and the upper ends of the two front risers 511 are connected by a horizontally arranged upper front cross tube 512, and the upper ends of the two front risers 511 are fixedly sleeved with an upper front riser connecting sleeve 515, and the two ends of the upper front cross tube 512 are inserted into the upper front riser connecting sleeve 515 and fixedly connected to the front risers 511 through an axle pin, and the lower ends of the two front risers 511 are connected by a horizontally arranged lower front cross tube 513, and the lower ends of the two front risers 511 are sleeved with a lower front riser connecting sleeve 516, wherein the two ends of the lower front cross tube 513 are respectively inserted into the lower front riser connecting sleeve 516 and The rear bracket 52 is fixedly connected by a pin shaft, and has two vertically arranged rear riser pipes 521, and the upper ends of the two rear riser pipes 521 are connected by a horizontally arranged upper rear cross pipe 522, the upper ends of the two rear riser pipes 521 are sleeved with an upper rear riser pipe connecting sleeve 525, and the two ends of the upper rear cross pipe 522 are inserted in the upper rear riser pipe connecting sleeve 525 and fixedly connected by an axle pin, and the lower ends of the two rear riser pipes 521 are connected by a horizontally arranged lower rear cross pipe 523, and the lower ends of the two rear riser pipes 521 are sleeved with a lower rear riser pipe connecting sleeve 526, and the two ends of the lower rear cross pipe 523 are inserted in the lower rear riser pipe connecting sleeve 526 and fixedly connected by a pin shaft.

[0044] The front stand pipe 511 and the rear stand pipe 521 are respectively provided with a rotating sleeve body 6 at the lower end thereof, and the rotating sleeve body 6 is a general term for the lower front stand pipe connecting sleeve 516 and the lower rear stand pipe connecting sleeve 526, and the ends of the upper support pipe 311 and the lower support pipe 312 that are away from each other are connected to the outer side of the rotating sleeve body 6; the lower end of the front stand pipe 511 is respectively provided with a chassis front connecting seat 514 located at the upper end of the rotating sleeve body 6, and the lower end of the rear stand pipe 521 is respectively provided with a chassis rear connecting seat 524 located at the upper end of the rotating sleeve body 6, and one of the two chassis longitudinal tubes 111 of the two chassis half bodies 11 is connected to the chassis half body 11. The ends are rotatably connected to the sides corresponding to the two front base connecting seats 514, and one end of the two base longitudinal tubes 111 of the remaining one of the two base half bodies 11 is rotatably connected to the sides corresponding to the two rear base connecting seats 524. The front base connecting seat 514 and the rear base connecting seat 524 are the above-mentioned rotating ends 12. The front base connecting seat 514 and the rear base connecting seat 524 are respectively integrated with the upper support sleeve 313 and the lower support sleeve 314 for structural design, which can improve the structural strength and ensure that the base body 1 is stably set on the plane rotating cross support structure 5.

[0045] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, a flat-folding handcart with a frame includes a frame body 5, and a plurality of wheel bodies 53 are arranged at the lower end of the frame body 5. The wheel body 53 includes a front wheel body 531 arranged at the lower end of the front bracket 51 and a rear wheel body 532 arranged at the lower end of the rear bracket 52. The front wheel body 531 is rotatably arranged in a wheel body connecting seat 533 and is connected to the front bracket 51 through the wheel body connecting seat 533. Adjacent rear wheel bodies 532 are fixedly connected through wheel body connecting shafts 534. The wheel body connecting shafts 534 can ensure that the wheel bodies 53 will not be pulled out, thereby ensuring the load-bearing capacity of the frame body 5 and improving the service life. The wheel body connecting sleeves 535 at both ends of the wheel body connecting shafts 534 are provided. The frame body 5 is fixedly connected to the rear bracket 52, and a pedal portion 536 is sleeved on the middle part of the wheel body connecting shaft 534. A handle 54 movably connected to the lower end of the front stand pipe 511 of the front bracket 51 is provided at the front end of the frame body 5. Two handle connecting rods 542 are provided at one end of the handle 54 through a handle connecting seat 541. A plug-in groove 517 is extended toward one side of the handle 54 by the lower front stand pipe connecting sleeve 516, and a plug-in block 543 is extended toward the plug-in groove 517 by the handle connecting rod 542. The plug-in block 543 is arranged in the plug-in groove 517 and is fixedly connected by a pin shaft. Two plug-in blocks 543 are provided on one side of the rear bracket 52, which are respectively located on the outer side of the rear stand pipe 521 and connected to the upper and lower sides of the rear stand pipe 521. The lower rear riser connecting sleeve 526 is extended toward the vertical column 55, the lower end of the vertical column 55 is inserted in the lower rear riser connecting sleeve 526 and is fixedly connected to the lower rear tube connecting sleeve 526, and the rear end of the frame body 5 is movably provided with a handle 56 connected to the upper end of the vertical column 55, the upper rear riser connecting sleeve 525 is extended toward the vertical column 55, and the upper end of the vertical column 55 is plugged and connected to the upper rear riser connecting sleeve 525, and the upper rear riser connecting sleeve 525 is connected to the handle 56 through a rotating portion 57, and the handle 56 can be rotatably set on one side of the vertical column 55 through the rotating portion 57, and the frame body 5 is provided above The awning bracket 7 can be used to install a awning to provide shade for items and improve the user experience. The awning bracket 7 has four vertically arranged bracket columns 71 that are respectively plugged and connected to the front vertical pipe 511 and the rear vertical pipe 521, and the bracket columns 71 are respectively plugged and arranged on the upper front vertical pipe connecting sleeve 515 and the upper rear vertical pipe connecting sleeve 525, which can ensure the connection effect between the bracket columns 71 and the frame body 5. The upper ends of the bracket columns 71 are respectively movably connected with bracket cross bars 72, which all extend toward the center and above the bottom frame body 1 and are rotatably arranged on the bracket connecting seat 73, which can facilitate the folding of the awning bracket 7.

[0046] The principle of this embodiment is that the lower ends of the front bracket 51 and the rear bracket 52 are fixedly connected through the bottom frame body 1, which can improve the overall load-bearing capacity of the frame body 5, and the bottom frame body 1 can be conveniently folded up and down through the flat-folding movable connection structure 2, reducing the occupied area and facilitating the placement of the frame body 5 by the user, and the plane rotating cross support structure 3 arranged at the lower end of the bottom frame body 1 can further improve the overall load-bearing capacity of the frame body 5, and can be folded forward and backward, which is convenient for user operation, and the handle 54 and the handle 56 can be conveniently folded by rotating the sleeve body 6 and the rotating part 57, which is convenient for user use and can reduce the occupied area and improve the user experience, and the rear wheel bodies 532 are connected by the wheel body connecting shaft 534, which can effectively prevent the wheel body 53 from being pulled out during the load-bearing process, ensure the stability of the frame body 5 and improve the user experience.

[0047] Embodiment 2

[0048] The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that: Figure 7 As shown, adjacent rear vertical tubes 521 are connected via a rear connecting tube 8, and adjacent front vertical tubes 511 are connected via a front connecting tube 9, thereby eliminating the upper front transverse tube 512, the upper rear transverse tube 522, the upper front vertical tube connecting sleeve 515, the upper rear vertical tube connecting sleeve 525, the canopy bracket 7 and the handle 56, thereby effectively reducing the production cost, facilitating the loading and unloading of a small cart, and improving the user experience.

[0049] Embodiment 3

[0050] The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that: Figure 8 As shown, the upper rear riser connection sleeve 525 is changed to the upper front riser connection sleeve 515, and the handle 56 and the vertical column 55 are cancelled. Through a variety of trolleys, users can choose according to their needs, thereby improving the user experience.

[0051] Embodiment 4

[0052] The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that: Fig. 9 As shown, the upper rear riser connecting sleeve 525 is changed to the upper front riser connecting sleeve 515, and the handle 56 and the vertical column 55 are cancelled, and the canopy bracket 7 is changed to a giant canopy bracket, and the bracket column 71 of the canopy bracket 7 is a retractable bracket column 71, which can facilitate the increase of the height of the canopy, and one end of the bracket column 71 is respectively fixedly connected to the upper front riser connecting sleeve 515 and the upper rear riser connecting sleeve 525, and the bracket connecting seats 73 are respectively arranged at the other end of the bracket column 71, and adjacent bracket connecting seats 73 are connected by bracket cross bars 72, and the bracket cross bars 72 are extended toward both ends, so that a giant canopy can be installed, which can improve the user experience.

[0053] Embodiment 5

[0054] The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that: Fig.10 As shown, the upper rear riser connecting sleeve 525 is changed to the upper front riser connecting sleeve 515, and the handle 56 and the vertical column 55 are cancelled, and the canopy bracket 7 is cancelled, so as to reduce the production cost, and the user can choose the rear-installed canopy bracket 7 according to the needs, so as to ensure the user experience.

[0055] Embodiment 6

[0056] The structure and working principle of this embodiment are basically the same as those of the first embodiment, except that: Fig.11 As shown, the two handle connecting rods 542 of the handle 54 are replaced with a single handle connecting sleeve, and the handle connecting sleeve and the handle 54 are movably connected via a handle clamping structure, and the handle 54 can be retracted into the handle connecting sleeve through the handle clamping structure, which can effectively reduce the space occupied by the handle 54 and reduce production costs.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0058] Although this article uses more chassis body 1, chassis half body 11, chassis longitudinal tube 111, chassis transverse tube 112, reinforced longitudinal tube 113, rotating end 12, flat folding movable connection structure 2, folding joint 21, first joint half body 22, second joint half body 23, locking hole 24, plane rotating cross support structure 3, plane rotating cross support tube group 31, upper support tube 311, horizontal support part 3111, inclined part 3112, horizontal connecting part 3113, lower support tube 312, upper support sleeve 313, lower support sleeve 314, plug-in rotating assembly 4, plug-in column 41, plug-in seat 42, frame body 5, front bracket 51, front vertical tube 511, upper front transverse tube 512, lower front transverse tube 513, chassis front connecting seat 514, upper front vertical tube connecting The following terms are used: connecting sleeve 515, lower front vertical pipe connecting sleeve 516, plug-in groove 517, rear bracket 52, rear vertical pipe 521, upper rear transverse pipe 522, lower rear transverse pipe 523, rear connecting seat 524 of the chassis, upper rear vertical pipe connecting sleeve 525, lower rear vertical pipe connecting sleeve 526, wheel body 53, front wheel body 531, rear wheel body 532, wheel body connecting seat 533, wheel body connecting shaft 534, wheel body connecting sleeve 535, pedal part 536, handle 54, handle connecting seat 541, handle connecting rod 542, plug-in block 543, vertical column 55, handle 56, rotating part 57, rotating sleeve 6, canopy bracket 7, bracket column 71, bracket cross bar 72, bracket connecting seat 73, rear connecting pipe 8, front connecting pipe 9, etc., but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitations interpreted as these terms are contrary to the spirit of the present invention.

Claims

1. A trolley chassis, comprising a horizontally arranged frame-shaped chassis body (1), characterized in that: The base frame (1) comprises two movably connected base frame halves (11), the ends of the two base frame halves (11) that are away from each other are rotating ends (12), and the ends of the two base frame halves (11) that are close to each other are connected by a flat folding movable connection structure (2) that enables the two base frame halves (11) to fold upward in a vertical direction at the connection point of the two base frame halves (11) under the action of an external force, and the width of the base frame (1) remains unchanged during the folding process. The lower end of the base frame (1) is provided with a planar rotating cross support structure (3) for supporting the base frame (1).

2. A trolley chassis according to claim 1, characterized in that: The two chassis half bodies (11) have the same structure and size and are both frame-shaped structures. Each chassis half body (11) comprises two chassis longitudinal tubes (111) which are arranged in parallel with each other and extend along the length direction of the chassis body (1). Two chassis transverse tubes (112) which are arranged in parallel with each other and extend along the width direction of the chassis body (1) are arranged between the chassis longitudinal tubes (111), and a plurality of mutually parallel reinforcing longitudinal tubes (113) are arranged between the two chassis transverse tubes (112).

3. A trolley chassis according to claim 2, characterized in that: The planar rotating cross-support structure (3) comprises at least one group of planar rotating cross-support tube groups (31), each group of planar rotating cross-support tube groups (31) comprises an upper support tube (311) and a lower support tube (312) which are arranged horizontally and are not located on the same horizontal plane, the upper support tube (311) and the lower support tube (312) are arranged in a V-shaped distribution, one end of the upper support tube (311) is located above the lower support tube (312) and is rotatably connected to one end of the lower support tube (312) through a plug-in rotating component (4), and the other end of the upper support tube (311) is bent.

4. A trolley chassis according to claim 3, characterized in that: The ends of the upper support tube (311) and the lower support tube (312) that are close to each other are crossed and connected in a horizontal direction, and the connection between the upper support tube (311) and the lower support tube (312) and the connection between the two base frame halves (11) are located on the same straight line along the width direction of the base frame body (1). The upper support tube (311) has a horizontal support portion (3111) that is connected in a rotational manner to the lower support tube (312), one side of the horizontal support portion (3111) is against the lower side of the base frame body (1), and the end of the horizontal support portion (3111) that is away from the lower support tube (312) is connected to a horizontally arranged horizontal connecting portion (3113) through an inclined portion (3112) that is arranged to extend obliquely downward.

5. A trolley chassis according to claim 3 or 4, characterized in that: The planar rotating cross support structure (3) comprises two groups of planar rotating cross support tube groups (31), and the upper support tubes (311) and the lower support tubes (312) of the two groups of planar rotating cross support tube groups (31) cross each other to form an X shape, the upper support tubes (311) in the two groups of planar rotating cross support tube groups (31) are located on the same horizontal plane and the ends are staggered so as to connect the two diagonals of the base frame (1), and the lower support tubes (312) in the two groups of planar rotating cross support tube groups (31) are located on the same horizontal plane and the ends are staggered so as to connect the other two diagonals of the base frame (1).

6. A trolley chassis according to claim 4, characterized in that: The plug-in rotating assembly (4) comprises a plug-in column (41) arranged at one end of a horizontal supporting portion (3111) of an upper supporting tube (311), and one end of the lower supporting tube (312) is arranged on a plug-in seat (42) suitable for the plug-in column (41), and the plug-in column (41) is rotatably plugged into the plug-in seat (42).

7. A trolley chassis according to claim 2, characterized in that: The flat-folding movable connection structure (2) comprises two folding joints (21) arranged between corresponding ends of two chassis half bodies (11), the folding joint (21) comprising a first joint half body (22) connected to the end of a chassis longitudinal tube (111) in one of the chassis half bodies (11) and a second joint half body (23) connected to the end of a chassis longitudinal tube (111) in the remaining chassis half body (11), the first joint half body (22) and the second joint half body (23) being connected by a rotating pin shaft, a locking hole (24) for inserting a locking pin being provided on the first joint half body (22), and an arc-shaped recess (25) corresponding to the locking pin being provided on the inner side of the second joint half body (23).

8. A frame, comprising a trolley chassis as claimed in any one of claims 1 to 7, comprising a frame body (5) having a front bracket (51) and a rear bracket (52) arranged vertically opposite to each other, characterized in that: A base frame body (1) is provided between the front frame (51) and the rear frame (52); the rotating ends (12) of the two base frame halves (11) of the base frame body (1) are respectively connected to the front frame (51) and the rear frame (52) in a rotatable manner; and a planar rotating cross support structure (3) is provided between the front frame (51) and the rear frame (52), which is located at the lower end of the base frame body (1) and is used to support the base frame body (1).

9. The frame according to claim 8, characterized in that: The front bracket (51) has two vertically arranged front risers (511), and the upper ends of the two front risers (511) are connected by a horizontally arranged upper front transverse tube (512), and the lower ends of the two front risers (511) are connected by a horizontally arranged lower front transverse tube (513). The rear bracket (52) has two vertically arranged rear risers (521), and the upper ends of the two rear risers (521) are connected by a horizontally arranged upper rear transverse tube (522), and the lower ends of the two rear risers (521) are connected by a horizontally arranged lower rear transverse tube (523). The lower ends of the front risers (511) and the rear risers (521) are respectively rotatably sleeved with a rotating sleeve (6), and the upper support tube (311) and the lower support tube (311) are connected to each other. One end of the tube (312) away from each other is connected to the outside of the rotating sleeve (6); the lower end of the front vertical tube (511) is respectively provided with a chassis front connecting seat (514) located at the upper end of the rotating sleeve (6), and the lower end of the rear vertical tube (521) is respectively provided with a chassis rear connecting seat (524) located at the upper end of the rotating sleeve (6); one end of the two chassis longitudinal tubes (111) of one chassis half body (11) of the two chassis half bodies (11) is respectively rotatably connected to one side corresponding to the two chassis front connecting seats (514), and one end of the two chassis longitudinal tubes (111) of the remaining chassis half body (11) of the two chassis half bodies (11) is respectively rotatably connected to one side corresponding to the two chassis rear connecting seats (524).

10. A foldable trolley having a frame as claimed in any one of claims 8 to 9, comprising a frame body (5), wherein a plurality of wheels (53) are provided at the lower end of the frame body (5), wherein: The front end of the frame body (5) is provided with a handle (54) movably connected to the lower end of the front vertical pipe (511) of the front bracket (51), and one side of the rear bracket (52) is provided with two vertical columns (55) respectively located on the outside of the rear vertical pipe (521) and connected to the upper and lower ends of the rear vertical pipe (521). The rear end of the frame body (5) is movably provided with a handle (56) connected to the upper end of the vertical column (55). A canopy bracket (7) is provided above the frame body (5). The canopy bracket (7) has four vertically arranged bracket columns (71) respectively connected to the front vertical pipe (511) and the rear vertical pipe (521) by plugging. The upper ends of the bracket columns (71) are respectively movably connected to bracket cross bars (72). The bracket cross bars (72) all extend toward the center of the bottom frame body (1) and are all rotatably arranged on the bracket connecting seat (73).

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