Expanding type groove folding and gathering cart

Abstract

The utility model discloses an expansion type groove folding and gathering trolley, and belongs to the technical field of trolleys. The device mainly comprises four sets of side vertical rods, top blocks and wheel assemblies are installed at the upper ends of the side vertical rods, and the wheel assemblies are detachably installed at the bottoms of the side vertical rods. The external connection assembly is detachably mounted on the side vertical rod; and the table plate assembly is mounted on the top block. According to the expanding type groove folding and gathering trolley, by arranging the pull rod assembly, the trolley is suitable for being in an unfolded state and a folded state, meanwhile, the trolley is small in size during folding, then storage of the trolley is facilitated, in the folding process of the trolley, the whole trolley does not rise, and the trolley is convenient to store. And meanwhile, the wheel assemblies are arranged, so that wheels can be detached when the trolley is gathered, the trolley does not rise at all, and the occupied space of the trolley is smaller.

Description

Technical Field

[0001] This application relates to the technical field of trolleys, and specifically provides an expandable groove folding and gathering trolley. Background Art

[0002] A trolley is a manually pushed and pulled handling vehicle, which is the ancestor of all vehicles. Although the material handling technology of trolleys has been continuously developing, trolleys are still used as an indispensable handling tool. Trolleys are widely used in production and life because they are inexpensive, easy to maintain, convenient to operate, light in weight, and can work in places where motor vehicles are inconvenient to use. They are very convenient for handling lighter items over short distances.

[0003] For example, the patent with the publication number CN115583274 A specifically discloses a gathering type folding trolley. This patent realizes high gathering of the volume after storage and a smaller volume through the Y-shaped folding components of the front wall and the rear wall, the foldability of the side walls, and the foldability of the chassis, thus facilitating the storage and placement of the trolley;

[0004] During the implementation of the above patent, although the trolley can be folded to reduce the occupied space, when the above-mentioned trolley is folded, its overall height will increase compared to when it is unfolded. As a result, the trolley occupies more space in the height direction after folding. Therefore, it is necessary to provide an expandable groove folding and gathering trolley to solve the above problems.

[0005] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by this application is to provide an expandable groove folding and gathering trolley, which solves the problem of the increased height of the trolley after folding.

[0007] The technical solution adopted by this application to solve its technical problems is as follows: An extended groove folding and gathering trolley, characterized in that: it includes four groups of side vertical rods, the upper ends of the side vertical rods are fixedly installed with top blocks, and middle blocks are slidably arranged in the middle of the side vertical rods; upper side rods, the upper side rods are hingedly installed on the top blocks; lower side rods, the lower side rods are hingedly installed on the middle blocks, and the lower side rods and the upper side rods are hinged at the middle position; middle rod groups, the middle rod groups have two middle rods hinged to each other, the middle rod groups are respectively hinged to the upper side rods and the lower side rods, and the two middle rods are hinged at the middle position to form a second joint point; bottom left block, the bottom left block is hinged at the bottom of one side of the side vertical rod; bottom right block, the bottom right block is hinged at the bottom of the other side of the side vertical rod; two bottom rod groups, the bottom rod groups are respectively hinged to the bottom left block and the bottom right block, and the other ends of the bottom rod groups are hingedly installed with bottom edge blocks; wheel assemblies, the wheel assemblies are detachably installed at the bottoms of the side vertical rods; a pull rod assembly, the pull rod assembly is installed between the bottom edge block and the second joint point. The pull rod assembly includes a single pull rod arranged between the second joint point and the bottom edge block, a long waist groove is opened at the upper end of the single pull rod, and a spring pin is inserted at the second joint point.

[0008] Further, an external connection component is installed on the side vertical rod. The external connection component includes an external connection hoop arranged on the side vertical rod, and an arc-shaped holding hoop is arranged on the external connection hoop; a through rod groove is vertically arranged on the external connection hoop, and an external connection rod is slidably inserted in the rod groove. An external connection groove is arranged on the side surface of the external connection hoop, and the external connection groove communicates with the rod groove. A button is rotatably arranged in the external connection groove, and a torsion spring is arranged between the button and the external connection groove; an external connection block is sleeved on the top of the external connection rod, an external connection strip is inserted on the external connection block, and an external connection shed is installed on the external connection strip; a long connection rod and a short connection rod are inserted on the external connection block.

[0009] Further, the wheel assembly includes a lower inner rod installed at the bottom of the side vertical rod. A mating groove with a bottom-through along the length direction is arranged inside the lower inner rod, the mating groove is square, and an insertion rod is slidably arranged inside the mating groove; a wheel frame is installed at the bottom of the insertion rod by bearings, and a wheel is installed on the wheel frame.

[0010] Further, the lower inner rod is provided with a slot with a side opening at the upper end of the fitting groove. An insertion block is inserted inside the slot. A horizontal sliding groove is provided at the upper end of the slot. A convex platform is provided on the side of the insertion block. A jack is provided on the side surface of the side vertical rod. A receiving groove is provided at the bottom of the insertion block. An elastic body is installed between the insertion block and the slot. The elastic body is adapted to push the insertion block to protrude from the jack in the initial state, and when pressed, the elastic body is adapted to drive the insertion block to slide into the inside of the jack. A receiving groove is provided at the bottom of the insertion block. A plug is provided at the upper end of the insertion rod. The plug is adapted to the receiving groove. A step is provided at the bottom of the receiving groove.

[0011] Further, an expansion component is provided at the upper end of the side vertical rod. The expansion component includes an expansion rod slidably arranged inside the side vertical rod. A limiting rod is installed at the lower end of the expansion rod. A spring is installed between the limiting rod and the upper end of the lower inner rod. A plurality of groups of guiding blocks are uniformly arranged along the circumferential direction at the bottom of the limiting rod. A plurality of groups of convex blocks are uniformly arranged along the circumferential direction inside the side vertical rod. A plurality of groups of guiding grooves are formed between the plurality of groups of convex blocks. The guiding grooves match the guiding blocks. A limiting groove is provided at the bottom of a group of convex blocks. A limiting portion is fixedly provided above the guiding block on the limiting rod. The limiting portion matches the limiting groove.

[0012] Further, a ceiling component is provided at the top of the expansion rod. The ceiling component includes a connecting sleeve sleeved on the top of the expansion rod. Four groups of shed rods are hinged on the four groups of connecting sleeves. The four groups of shed rods are jointly hinged with a shed connecting block at the other end.

[0013] Further, a sky curtain component is provided at the top of the expansion rod. The sky curtain component includes an extension rod sleeved on the expansion rod. A curtain connecting block is sleeved at the top of the extension rod. The curtain connecting block has three connecting ends. A curtain strip is inserted on the connecting end located on the outside. A curtain is installed on the curtain strip. A long curtain rod and a short curtain rod are inserted at the other two positions of the connecting end. The long curtain rod and the short curtain rod are used to connect and fix the four connecting ends.

[0014] Further, an extension component is installed on the bottom left block. The extension component includes a cross bar hinged on the bottom left block. The cross bar is arranged along the direction perpendicular to the forward movement of the cart. A cross block is jointly hinged between the two groups of cross bars. An extension rod is hinged on the bottom left block along the forward movement direction of the cart. The extension rod is adapted to rotate in the vertical direction. An end block is provided at the end of the extension rod. An extension block is slidably arranged at the middle position of the extension rod. A first folding rod is hinged and installed on the end block. A second folding rod is hinged on the extension block. The two groups of first folding rods are hinged with each other at the other end. The first folding rod and the second folding rod are hinged with each other at the middle position.

[0015] Furthermore, a tabletop assembly is installed on the top block. The tabletop assembly includes a tabletop joint that is snap-fitted to the top block. A collar is provided at the upper end of the tabletop joint, and a table rod is inserted into the collar. Along the length direction of the table rod, multiple groups of clamping sleeves are evenly arranged. A tabletop is snap-fitted inside the clamping sleeves. A side sleeve is sleeved on the side of the tabletop, and side plates are installed at positions of the side sleeve away from the tabletop, and the side plates are hinged to each other.

[0016] The beneficial effects of this application are as follows: The expandable groove folding and gathering trolley provided by this application has the following beneficial effects:

[0017] 1. By providing a pull rod assembly, the trolley is suitable for being in an unfolded and folded state, and has a smaller volume during folding, thus facilitating the storage of the trolley. Moreover, during the folding process of the trolley, the overall height of the trolley does not increase, further reducing the difficulty of storing the trolley.

[0018] 2. By providing an extension assembly that can be folded and unfolded, the trolley can be conveniently folded and stored, and can be extended in the length direction to facilitate the transportation of longer goods.

[0019] 3. By providing a wheel assembly, the wheels can be conveniently detached from the trolley, thus realizing quick disassembly of the wheels. At the same time, when the trolley is gathered, a smaller volume can be achieved, making the size of the trolley smaller during packaging.

[0020] In addition to the objectives, features, and advantages described above, this application has other objectives, features, and advantages. The following will refer to the drawings to further elaborate on this application in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0022] In the drawings:

[0023] Figure 1 is the overall schematic diagram of an expandable groove folding and gathering trolley in this application Figure One ;

[0024] Figure 2 is the overall schematic diagram of an expandable groove folding and gathering trolley in this application Figure Two ;

[0025] Figure 3 is the overall schematic diagram of an expandable groove folding and gathering trolley in this application Figure Three ;

[0026] Figure 4 The overall schematic diagram of an extended groove folding and gathering trolley in this application Figure Four ;

[0027] Figure 5 is Figure 3 the partial structural schematic diagram at position A in

[0028] Figure 6 is Figure 5 the partial structural schematic diagram of the lower inner rod and the insertion block in

[0029] Figure 7 is Figure 3 the partial structural schematic diagram at position B in

[0030] Figure 8 is Figure 3 the partial structural schematic diagram at position C in

[0031] Figure 9 is Figure 4 the partial structural schematic diagram of the expansion component in

[0032] Figure 10 is Figure 5 the internal structural schematic diagram of the matching part between the side vertical rod and the expansion component in

[0033] Figure 11 The overall schematic diagram of the expansion canopy of an extended groove folding and gathering trolley in this application

[0034] Figure 12 The overall schematic diagram of the expansion awning of an extended groove folding and gathering trolley in this application

[0035] Figure 13 The overall schematic diagram of the rear door of an extended groove folding and gathering trolley in this application

[0036] Figure 14 The overall structural schematic diagram of the expansion table board and the external awning of an extended groove folding and gathering trolley in this application

[0037] Figure 15 The overall structural schematic diagram of the external awning of an extended groove folding and gathering trolley in this application

[0038] Figure 16 is Figure 15 the partial structural schematic diagram at position D in

[0039] Figure 17 The overall structural schematic diagram of the expansion table board of an extended groove folding and gathering trolley in this application

[0040] Figure 18 is Figure 17 the partial structural schematic diagram at position E in

[0041] Among them, the reference numerals in the figure are:

[0042] 1. Frame assembly; 11. Upper side bar; 12. Lower side bar; 13. Upper side bar; 14. Lower side bar; 15. Top block; 16. Middle block; 17. Bottom left block; 18. Bottom right block; 19. Side upright bar; 191. Socket; 192. Guide groove; 193. Limiting groove; 110. Bottom middle block; 111. Bottom side bar; 112. Bottom middle bar; 113. Bottom side block; 114. Middle bar;

[0043] 2. Tie rod assembly; 21. Upper tie rod; 22. Lower tie rod; 23. Single tie rod; 24. Long waist groove;

[0044] 3. wheel assembly; 31. wheel; 32. wheel frame; 33. plug rod; 34. plug; 35. lower inner rod; 351. slide groove; 352. slot; 353. matching groove; 36. plug block; 361. boss; 362. receiving groove;

[0045] 4. Handle assembly; 41. Articulated block; 42. Connecting rod; 43. Lower handle; 431. Fixing hole; 44. Upper handle; 441. Shrapnel; 45. Grip; 46. Junction block;

[0046] 5. expansion assembly; 51. pressing head; 52. clamping block; 53. expansion rod; 531. clamping groove; 54. limiting rod; 541. guide block; 542. limiting part; 56. spring;

[0047] 6. Ceiling assembly; 61. Connecting sleeve; 62. Shed pole; 63. Shed joint block;

[0048] 7. Sky curtain assembly; 71. Curtain; 72. Curtain strips; 73. Extension rod; 74. Curtain connecting block; 75. Long curtain rod; 76. Short curtain rod;

[0049] 8. extension assembly; 81. crossbar; 82. cross block; 83. extension rod; 84. extension block; 86. end block; 87. first folding rod; 88. second folding rod;

[0050] 9. External assembly; 91. External shed; 92. External rod; 93. Long rod; 94. Short rod; 95. External block; 96. External bar; 97. External hoop; 971. External groove; 972. Hoop; 973. Rod groove; 98. Button;

[0051] 10. Table top assembly; 101. Table top joint; 102. Table rod; 103. Side sleeve; 104. Clamp sleeve; 105. Table top; 106. Side panel. DETAILED DESCRIPTION

[0052] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0053] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0054] Embodiment 1:

[0055] This embodiment elaborates on the structure and principle of the expandable gathering trolley. Specifically:

[0056] As Figures 1 - 3 shown, the present application provides an expandable groove folding gathering trolley, including a frame assembly 1, which is the basic structure of the trolley and provides necessary support for the trolley.

[0057] The frame assembly 1 includes four groups of side vertical rods 19, which are distributed around the trolley, thus defining the load-bearing range of the trolley. At the same time, a top block 15 is fixedly installed at the top of the four groups of side vertical rods 19, and an intermediate block 16 is slidably installed at the middle position of the four groups of side vertical rods 19. Multiple groups of rods are hinged on both the intermediate block 16 and the top block 15, and the multiple groups of rods constitute the overall frame of the trolley. Specifically:

[0058] As Figures 1 - 3 shown, an upper side rod 11 is hingedly installed on the top block 15 along the advancing direction of the trolley. The upper side rod 11 can rotate in the vertical direction along the top block 15. At the same time, a lower side rod 12 is hingedly installed on the intermediate block 16 along the advancing direction of the trolley. The lower side rod 12 can rotate in the vertical direction along the intermediate block 16, and the lower side rod 12 and the upper side rod 11 are hinged to each other at the middle position. For the convenience of description, the position where the upper side rod 11 and the lower side rod 12 are hinged to each other is defined as the first hinge point. Thus, the upper side rod 11 and the lower side rod 12 can rotate in the vertical direction around the first hinge point and drive the intermediate block 16 to slide on the side vertical rod 19.

[0059] At the same time, middle rods 114 are hinged at the positions of the upper side rod 11 and the lower side rod 12 far from the side vertical rod 19. Both ends of each middle rod 114 are hinged to the side rods, and the two groups of middle rods 114 are hinged to each other at the middle position. For the convenience of description, the position where the two groups of middle rods 114 are hinged is defined as the second hinge point. Thus, the two groups of middle rods 114 can rotate in the vertical direction around the second hinge point.

[0060] In this application, the mutually hinged upper side rod 11 and lower side rod 12 are defined as a side rod group, and the mutually hinged middle rod 114 is defined as a middle rod group. Thus, the trolley in this embodiment is composed of two sets of side rod groups and one set of middle rod groups, forming a triple intersection. And during the process of the middle block 16 sliding along the side vertical rod 19, the triple intersection is adapted to expand to form a complete trolley, and the triple intersection is adapted to gather together for easy storage.

[0061] Continue to refer to Figures 1 - 3 , a side upper rod 13 is hinged at a position on the top block 15 perpendicular to the advancing direction of the trolley, and a side lower rod 14 is hinged at a position on the middle block 16 perpendicular to the advancing direction of the trolley. There are two sets of both the side upper rod 13 and the side lower rod 14, and the end of the side upper rod 13 is hinged to the end of the other set of side lower rod 14. At the same time, two adjacent side upper rods 13 and side lower rods 14 are hinged at the middle position. Thus, as the middle block 16 slides on the side vertical rod 19, both the side upper rod 13 and the side lower rod 14 can rotate in the vertical direction and gather or expand synchronously;

[0062] At the same time, a bottom left block 17 is fixedly installed at the bottom end of the left side vertical rod 19, and a bottom right block 18 is fixedly installed at the bottom end of the right side vertical rod 19. And a bottom side rod 111 is hinged on both the bottom left block 17 and the bottom right block 18, and the bottom side rod 111 is adapted to rotate in the vertical direction along the bottom left block 17 (or the bottom right block 18);

[0063] And a bottom middle block 110 is hingedly installed at a position of the bottom side rod 111 far from the side vertical rod 19. The bottom middle block 110 has four cross-shaped joints. Therefore, in addition to the position hinged to the bottom side rod 111, two other bottom middle rods 112 are hingedly installed at the other two hinged positions. For the convenience of description, the structure composed of two mutually hinged bottom side rods 111, one bottom middle block 110, and two bottom middle rods 112 is defined as a bottom rod group. The bottom rod group can perform gathering and expanding actions during the vertical movement of the bottom middle block 110;

[0064] In this embodiment, there are two sets of bottom rod groups, and a bottom side block 113 is hingedly installed between the two sets of bottom rod groups. The bottom side block 113 is respectively hinged to the bottom middle rods 112 in the two sets of bottom rod groups, thereby connecting the two sets of bottom rod groups into a whole through the bottom side block 113.

[0065] To improve the stability of the frame assembly 1, such as Figure 2As shown in the figure, a tie rod assembly 2 is provided between the second hinge point and the bottom base block 113. The tie rod assembly 2 includes an upper tie rod 21 fixedly installed at the second hinge point and a lower tie rod 22 fixedly installed at the bottom base block 113. Both the upper tie rod 21 and the lower tie rod 22 are vertically arranged. At the same time, a tie rod groove with an open bottom end (not shown in the figure) is provided inside the upper tie rod 21, so that the lower tie rod 22 can slide vertically inside the upper tie rod 21 to adapt to the gathering and unfolding of the frame assembly 1;

[0066] At the same time, a vertically elongated waist slot (not marked in the figure) is provided on the lower tie rod 22, and a pin (not shown in the figure) is fixedly installed on the upper tie rod 21. The pin can slide in the waist slot, so as to limit the sliding position of the lower tie rod 22 to prevent the lower tie rod 22 from disengaging from the upper tie rod 21. When the trolley is gathered, the lower tie rod 22 is completely received in the upper tie rod 21, so that the height of the trolley does not change after the trolley is gathered.

[0067] It should be noted that the tie rod assembly 2 can also be set in the form of a single tie rod. For example, Figure 1 As shown in the figure, that is, a single tie rod 23 is provided between the second hinge point and the bottom base block 113. At the same time, a long waist slot 24 is provided at the upper end of the single tie rod 23, and a spring pin (not shown in the figure) is inserted through the second hinge point. Thus, by pressing the spring pin, the single tie rod 23 can be ejected, so that the trolley can be unfolded, and by pressing the spring pin again, the spring pin can be stuck in the long waist slot 24, so that the single tie rod 23 can be received.

[0068] In order to enable the trolley to move, as Figure 2 and Figures 5 - 6 shown, wheel assemblies 3 are provided at the bottoms of the four groups of side vertical rods 19. The wheel assemblies 3 include lower inner rods 35 fixedly installed at the bottoms of the side vertical rods 19. A mating groove 353 with a through bottom is provided along the length direction inside the lower inner rod 35. The mating groove 353 is square-shaped, and a plug rod 33 is slidably arranged inside the mating groove 353, so that the plug rod 33 can slide inside the mating groove 353 and cannot rotate;

[0069] A wheel carrier 32 is installed at the bottom of the plug rod 33 by means of a bearing. A wheel 31 is fixedly installed on the wheel carrier 32. The wheel 31 is used to drive the trolley to move;

[0070] In order to fix the plug rod 33, as Figures 5 - 6As shown, at the upper end of the lower inner rod 35 located in the fitting groove 353, there is a slot 352 with a side opening. An insertion block 36 is inserted inside the slot 352. And at the upper end of the slot 352, there is a horizontal sliding groove 351, and at the side of the insertion block 36, there is a boss 361. Thus, the insertion block 36 can slide into or out of the slot 352 under the cooperation of the sliding groove 351 and the boss 361;

[0071] Meanwhile, on the side of the side vertical rod 19, there is a jack 191 which is used to facilitate the sliding out of the insertion block 36, and the insertion block 36 is lapped at the jack 191 through the boss 361 so as to fix the position of the insertion block 36;

[0072] And at the bottom of the insertion block 36, there is a receiving groove 362. It should be noted that an elastic body is fixedly installed between the insertion block 36 and the slot 352. The elastic body is adapted to push the insertion block 36 to protrude from the jack 191 in the initial state, so that the insertion block 36 is fixed. And when the elastic body is pressed, it is adapted to drive the insertion block 36 to slide into the inside of the jack 191. At the same time, at the upper end of the insertion rod 33, a plug 34 is fixedly arranged. The plug 34 is adapted to the receiving groove 362. And at the bottom of the receiving groove 362, there is a step (not marked in the figure), and there is a gap between the plug 34 and the insertion rod 33, and the gap is adapted to the step. Thus, when the insertion rod 33 needs to be installed, the insertion block 36 is pressed so that the insertion block 36 slides into the side vertical rod 19, and then the insertion rod 33 is pushed upward until the plug 34 is located at the position of the receiving groove 362. Subsequently, the insertion block 36 is released. At this time, the insertion block 36 resets under the action of the elastic body and fixes the insertion rod 33 in the receiving groove 362;

[0073] When the insertion rod 33 needs to be disassembled, the insertion rod 33 can be removed by pressing the insertion block 36 again. Thus, the quick disassembly of the insertion rod 33 is realized, and further the quick disassembly of the wheel 31 is realized. When the frame assembly 1 is gathered, a smaller volume can be achieved, so that the size of the trolley is smaller when it is packaged.

[0074] To facilitate the operation of the staff, as Figures 1 - 3 and Figure 7 shown, a handle assembly 4 is installed on the bottom right block 18. The handle assembly 4 is used for the staff to push the trolley. The handle assembly 4 includes a hinge block 41 hinged on the bottom right block 18. At the same time, a connecting rod 42 is hinged on the hinge block 41. Thus, the connecting rod 42 can rotate flexibly under the action of the two hinge points;

[0075] Meanwhile, a junction block 46 is hinged and installed at one end of the connecting rod 42 away from the hinge block 41. A pull-down handle 43 is fixedly installed on the junction block 46. An upper pull handle 44 is installed on the pull-down handle 43, and a grip 45 is fixedly installed on the upper pull handle 44. Thus, the staff can hold the grip 45 to drive the trolley to move, thereby achieving the effect of labor saving. Moreover, both the connecting rod 42 and the pull-down handle 43 are hinged and installed. Thus, when the trolleys are gathered, the handle assembly 4 can also be folded and gathered, further reducing the volume of the trolley;

[0076] Moreover, a cavity (not marked in the figure) is provided at the upper end of the pull-down handle 43. The upper pull handle 44 can slide in the cavity. Thus, the upper pull handle 44 can slide into the pull-down handle 43 for storage. Meanwhile, an elastic piece 441 is provided on the upper pull handle 44, and a fixing hole 431 is provided on the side of the pull-down handle 43. Thus, the elastic piece 441 can be snapped into the fixing hole 431 to fix the upper pull handle 44 in the stretched state. When storage is required, press the elastic piece 441 to make the elastic piece 441 enter the interior of the pull-down handle 43. At this time, the upper pull handle 44 can smoothly slide into the cavity of the pull-down handle 43.

[0077] Embodiment 2:

[0078] During the use of the trolley, it is often necessary to be applied in some special occasions, such as as a temporary sales point. At this time, it is necessary to install a canopy to block sunlight or prevent rain. However, the temporary addition often requires the staff to additionally add rods for fixation, thus increasing the difficulty of on-site operation;

[0079] To solve the above problems, as Figures 4 - 5 and Figures 8 - 10 shown, an expansion component 5 is provided at the upper end of the trolley. The expansion component 5 is used to temporarily add additional accessories to the trolley to realize the application of the trolley in different scenarios;

[0080] The expansion component 5 includes an expansion rod 53 slidably arranged inside the side vertical rod 19. A limiting rod 54 is fixedly installed at the lower end of the expansion rod 53. Meanwhile, a spring 56 is fixedly installed between the limiting rod 54 and the upper end of the lower inner rod 35. Thus, the expansion rod 53 can slide inside the side vertical rod 19 and reset under the action of the spring 56. And in the initial state, the spring 56 is in an extended state and pushes the expansion rod 53 out of the side vertical rod 19;

[0081] Meanwhile, a pressing head 51 is fixedly installed at the top of the expansion rod 53. The pressing head 51 is used for the staff to spin-press the expansion rod 53 so that the expansion rod 53 can extend or be stored in the side vertical rod 19;

[0082] To fix the expansion rod 53 during storage, as Figures 9 - 10As shown, a plurality of groups of guide blocks 541 are uniformly arranged along the circumferential direction at the bottom of the limit rod 54. At the same time, a plurality of groups of convex blocks (not marked in the figure) are uniformly arranged along the circumferential direction inside the side vertical rod 19, so as to form a plurality of groups of guide grooves 192 between the plurality of groups of convex blocks. The guide grooves 192 are matched with the guide blocks 541, so that the extension rod 53 can slide inside the side vertical rod 19 under the cooperation of the guide blocks 541 and the guide grooves 192;

[0083] At the same time, a limit groove 193 is arranged at the bottom of a group of convex blocks, and a limit portion 542 is fixedly arranged above the guide block 541 on the limit rod 54. The limit portion 542 is matched with the limit groove 193, so that the limit portion 542 can be clamped into the limit groove 193 to limit and fix the extension rod 53;

[0084] In summary, in the initial state, under the action of the spring 56, the extension rod 53 extends out of the side vertical rod 19 to facilitate temporarily adding additional accessories to the trolley. When it is necessary to store the extension rod 53, the staff first presses the pressing head 51, so that the extension rod 53 moves downward until the guide block 541 slides into the guide groove 192;

[0085] Continue to push the extension rod 53 downward so that the upper end of the guide block 541 is located at the lower end of the convex block, and then rotate the pressing head 51 so that the extension rod 53 rotates slightly until the limit portion 542 is located below the limit groove 193. At this time, the spring 56 also rotates slightly, but it will not affect the performance of the spring 56;

[0086] Subsequently, the staff releases the pressing head 51, and the limit portion 542 snaps into the limit groove 193 under the action of the restoring force of the spring 56, and limits and fixes the stored extension rod 53;

[0087] When it is necessary to use the extension rod 53, press and rotate the pressing head 51 again so that the guide block 541 is aligned with the guide groove 192, so that the extension rod 53 can extend under the action of the spring 56.

[0088] In order to fix the extension rod 53 in the extended state, as Figures 8 - 9 shown, a clamping groove 531 is arranged on the extension rod 53. At the same time, a clamping hole (not marked in the figure) is arranged on the side of the top block 15. A clamping block 52 is clamped in the clamping hole. The clamping block 52 is adapted to penetrate the side vertical rod 19 and extend into the clamping groove 531. Thus, when the extension rod 53 extends, through the cooperation of the clamping block 52 and the clamping groove 531, the extension rod 53 is kept fixed.

[0089] In this embodiment, the following application scenarios of the extension rod 53 are provided. Specifically:

[0090] Such as Figure 11As shown, the figure shows the specific structure of adding a ceiling assembly 6 on the top of the expansion rod 53, and the ceiling assembly 6 includes a connecting sleeve 61 mounted on the top of the expansion rod 53, and four groups of connecting sleeves 61 are hinged with shelf rods 62, and the four groups of shelf rods 62 are hinged with a shelf connecting block 63 at the other end, thereby forming a structure on which a ceiling can be installed above the expansion rod 53, so that the cart can be used in various scenarios such as outdoor sales.

[0091] like Figure 12 As shown, the figure shows the specific structure of adding a canopy assembly 7 on the top of the expansion rod 53. The canopy assembly 7 can provide a larger protection range than the ceiling assembly 6. The canopy assembly 7 includes an extension rod 73 sleeved on the expansion rod 53. The top of the extension rod 73 is sleeved with a curtain connection block 74. The curtain connection block 74 has three groups of connection ends, and a curtain bar 72 is inserted on the outer connection end. The curtain bar 72 is installed with a curtain cloth 71, so that the area within the range of the cart can be better protected by the outwardly extended curtain cloth 71.

[0092] At the same time, in order to maintain the stability of the canopy assembly 7, a long curtain rod 75 and a short curtain rod 76 are inserted at the other two positions of the connection end. The long curtain rod 75 and the short curtain rod 76 are used to connect and fix the four connection ends, thereby maintaining the stability of the canopy assembly 7.

[0093] Embodiment three:

[0094] When using the cart, some goods are too long to be supported by the original cart structure. In this case, additional extension rods are usually required to achieve the purpose. However, the extension rods need to be installed and disassembled by the staff, which increases the burden on the staff.

[0095] In order to solve the above problems, Figure 13 As shown, an extension assembly 8 is installed on the bottom left block 17, and the extension assembly 8 is used to extend the cart so as to carry longer goods. The extension assembly 8 includes a cross bar 81 hinged on the bottom left block 17, and the cross bar 81 is arranged along a direction perpendicular to the forward movement of the cart. At the same time, a cross block 82 is hinged between two groups of cross bars 81, so that the cross block 82 can move in the vertical direction to drive the two groups of cross bars 81 to gather or unfold together with the cart;

[0096] In this embodiment, because the cart is supported by two sets of cross bars 81, the upper side bar 13 and the lower side bar 14 hinged to each other on this side are eliminated, thereby simplifying the structure of the cart;

[0097] At the same time, an extension rod 83 is hingedly provided on the bottom left block 17 along the forward direction of the cart, and the extension rod 83 is suitable for rotating in the vertical direction to fit on the side upright rod 19 for storage, and unfolding to the horizontal direction to carry the extended goods;

[0098] Continue to refer Figure 13 An end block 86 is provided at the end of the extension rod 83, and an extension block 84 is slidably provided at the middle position of the extension rod 83. At the same time, a first folding rod 87 is hingedly installed on the end block 86, and a second folding rod 88 is hingedly installed on the extension block 84. The two groups of first folding rods 87 are hinged to each other at the other ends, and the first folding rod 87 and the second folding rod 88 are hinged to each other at the middle position, so that the two groups of extension rods 83 can be folded and stored together, and unfolded to carry extended goods.

[0099] Embodiment 4:

[0100] This embodiment describes the structure and principle of the expansion type gathering cart expansion table and external canopy, specifically:

[0101] like Figure 14 and Figure 17 As shown, an external component 9 is provided at the upper end of the side pole 19, and the external component 9 is used to add a curtain on the top of the cart. At the same time, a table board component 10 is also provided on the side pole 19, and the table board component 10 is used to increase the carrying capacity of the cart, so as to facilitate the staff to operate on the table board component 10 and prevent small objects from falling, so as to adapt to the application of the cart in different scenarios;

[0102] like Figures 14 - 16 As shown, the external connection assembly 9 includes an external connection hoop 97 disposed on the side upright 19, and an arc-shaped clamp 972 is disposed on the external connection hoop 97, so that the external connection hoop 97 is connected to any position of the side upright 19 through the clamp 972 and fixed by a fastener;

[0103] At the same time, a through rod groove 973 is vertically provided on the external coupling 97, and the external rod 92 is slidably inserted in the rod groove 973. At the same time, an external groove 971 is provided on the side of the external coupling 97, and the external groove 971 is connected with the rod groove 973. A button 98 is rotatably provided in the external groove 971, and a torsion spring (not shown in the figure) is provided between the button 98 and the external groove 971, so that in a free state, one end of the button 98 will abut against the surface of the external rod 92 under the action of the torsion spring and fix the external rod 92, and when the staff presses the button 98, the abutting end of the button 98 will release the restriction on the external rod 92, so that the external rod 92 can slide freely in the external groove 971 and adjust its position;

[0104] An external block 95 is sleeved on the top of the external rod 92. The external block 95 has three sets of external ends, wherein an external bar 96 is inserted on the external end located on the outside, and an external shed 91 is installed on the external bar 96, so that the area within the range of the cart can be better protected by the external shed 91 that expands outwards;

[0105] Meanwhile, in order to maintain the stability of the external component 9, a long connecting rod 93 and a short connecting rod 94 are inserted at two other positions of the external connection end. The long connecting rod 93 and the short connecting rod 94 are used to connect and fix the four external connection ends, thereby maintaining the stability of the external component 9.

[0106] As Figures 17 - 18 shown, the tabletop assembly 10 includes a tabletop joint 101 snap-fitted on the top block 15. The upper end of the tabletop joint 101 is provided with a collar (not marked in the figure), and a table rod 102 is inserted into the collar. The table rod 102 is arranged along the advancing direction of the trolley.

[0107] Meanwhile, a plurality of sets of clamping sleeves 104 are uniformly arranged on the table rod 102 along the length direction. A tabletop 105 is snap-fitted on each set of clamping sleeves 104. It can be understood that the bottom of the tabletop 105 is U-shaped, so that the clamping sleeve 104 can be snap-fitted on the bottom of the tabletop 105 to realize the limit of the tabletop 105.

[0108] In this embodiment, the clamping sleeve 104 is made of nylon material, so that it can better adapt to the shape of the bottom of the tabletop 105, thereby stably fixing the tabletop 105.

[0109] In order to connect multiple sets of tabletops 105 into a whole and further strengthen the stability of the tabletops 105, continue to refer to Figure 18 , a side sleeve 103 is sleeved on the side of the tabletop 105. Meanwhile, a side plate 106 is fixedly installed at a position of the side sleeve 103 away from the tabletop 105, and multiple sets of side plates 106 are hinged. Thus, through the movable side sleeve 103, multiple sets of tabletops 105 are connected, thereby further strengthening the stability of the tabletops 105 to adapt to different application scenarios of the trolley.

[0110] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An extended grooved folding and gathering trolley, characterized in that: Including: Four groups of side vertical rods (19), with a top block (15) fixedly installed at the upper end of the side vertical rod (19), and an intermediate block (16) slidably arranged in the middle of the side vertical rod (19); An upper side rod (11) hingedly installed on the top block (15); A lower side rod (12) hingedly installed on the intermediate block (16), and the lower side rod (12) is hinged to the upper side rod (11) at the middle position; An intermediate rod group having two middle rods (114) hinged to each other, and the intermediate rod group is respectively hinged to the upper side rod (11) and the lower side rod (12), and the two middle rods (114) are hinged at the middle position to form a second hinge point; A bottom left block (17) hinged at the bottom of one side of the side vertical rod (19); A bottom right block (18) hinged at the bottom of the other side of the side vertical rod (19); Two groups of bottom rod groups respectively hinged to the bottom left block (17) and the bottom right block (18), and the other end of the bottom rod group is hingedly installed with a bottom edge block (113); A wheel assembly (3) detachably installed at the bottom of the side vertical rod (19); A pull rod assembly (2) installed between the bottom edge block (113) and the second hinge point. The pull rod assembly (2) includes: A single pull rod (23) is arranged between the second hinge point and the bottom edge block (113), a long waist slot (24) is opened at the upper end of the single pull rod (23), and a spring pin is inserted at the second hinge point.

2. The expandable groove folding and gathering trolley according to claim 1, wherein: An external connection assembly (9) is installed on the side vertical rod (19). The external connection assembly (9) includes an external connection hoop (97) arranged on the side vertical rod (19), and an arc-shaped holding hoop (972) is arranged on the external connection hoop (97); A through rod slot (973) is vertically arranged on the external connection hoop (97), an external connection rod (92) is slidably inserted in the rod slot (973), an external connection slot (971) is arranged on the side surface of the external connection hoop (97), the external connection slot (971) communicates with the rod slot (973), a button (98) is rotatably arranged in the external connection slot (971), and a torsion spring is arranged between the button (98) and the external connection slot (971); An external connection block (95) is sleeved on the top of the external connection rod (92), an external connection strip (96) is inserted on the external connection block (95), and an external connection shed (91) is installed on the external connection strip (96); A long connection rod (93) and a short connection rod (94) are inserted on the external connection block (95).

3. An extended groove folding and gathering trolley according to claim 2, characterized in that: The wheel assembly (3) includes a lower inner rod (35) installed at the bottom of the side vertical rod (19), a mating slot (353) with a bottom-through opening is arranged along the length direction inside the lower inner rod (35), the mating slot (353) is square-shaped, and a plug rod (33) is slidably arranged inside the mating slot (353); A wheel frame (32) is installed at the bottom of the plug rod (33) by means of a bearing, and a wheel (31) is installed on the wheel frame (32).

4. An expandable groove folding and gathering trolley according to claim 3, characterized in that: The upper end of the lower inner rod (35) located in the fitting groove (353) is provided with a slot (352) with a side opening. An insertion block (36) is inserted inside the slot (352). The upper end of the slot (352) is provided with a horizontal sliding groove (351). A boss (361) is arranged on the side of the insertion block (36). A jack (191) is arranged on the side surface of the side vertical rod (19). A receiving groove (362) is arranged at the bottom of the insertion block (36). An elastic body is installed between the insertion block (36) and the slot (352). The elastic body is adapted to push the insertion block (36) to protrude from the jack (191) in the initial state, and when pressed, the elastic body is adapted to drive the insertion block (36) to slide into the inside of the jack (191). The upper end of the insertion rod (33) is provided with a plug (34). The plug (34) is adapted to the receiving groove (362). A step is arranged at the bottom of the receiving groove (362).

5. The expandable groove folding and gathering trolley according to claim 4, wherein: The upper end of the side vertical rod (19) is provided with an expansion component (5). The expansion component (5) includes an expansion rod (53) slidably arranged inside the side vertical rod (19). A limiting rod (54) is installed at the lower end of the expansion rod (53). A spring (56) is installed between the limiting rod (54) and the upper end of the lower inner rod (35). A plurality of groups of guiding blocks (541) are uniformly arranged along the circumferential direction at the bottom of the limiting rod (54). A plurality of groups of convex blocks are uniformly arranged along the circumferential direction inside the side vertical rod (19). A plurality of groups of guiding grooves (192) are formed between the plurality of groups of convex blocks. The guiding grooves (192) are matched with the guiding blocks (541). A limiting groove (193) is arranged at the bottom of a group of convex blocks. A limiting part (542) is fixedly arranged above the guiding blocks (541) on the limiting rod (54). The limiting part (542) is matched with the limiting groove (193).

6. The extended groove folding and gathering trolley according to claim 5, characterized in that: The top of the expansion rod (53) is provided with a ceiling component (6). The ceiling component (6) includes a connecting sleeve (61) sleeved on the top of the expansion rod (53). Four groups of shed rods (62) are hinged on each of the four groups of connecting sleeves (61). The other ends of the four groups of shed rods (62) are jointly hinged with a shed connecting block (63).

7. The expandable groove folding and gathering trolley according to claim 5, wherein: The top of the expansion rod (53) is provided with a tent component (7). The tent component (7) includes an extension rod (73) sleeved on the expansion rod (53). The top of the extension rod (73) is sleeved with a curtain connecting block (74). The curtain connecting block (74) has three connecting ends. A curtain strip (72) is inserted on the connecting end located on the outside. A curtain (71) is installed on the curtain strip (72). A long curtain rod (75) and a short curtain rod (76) are inserted at the other two positions of the connecting end. The long curtain rod (75) and the short curtain rod (76) are used to connect and fix the four connecting ends.

8. An expandable groove folding and gathering trolley according to claim 1, characterized in that: An extension component (8) is installed on the bottom left block (17). The extension component (8) includes a cross bar (81) hinged to the bottom left block (17). The cross bar (81) is arranged along a direction perpendicular to the forward movement of the cart. A cross block (82) is jointly hinged between two groups of the cross bars (81). An extension rod (83) is hingedly arranged on the bottom left block (17) along the forward direction of the cart. The extension rod (83) is adapted to rotate in the vertical direction. An end block (86) is arranged at the end of the extension rod (83). An extension block (84) is slidably arranged at the middle position of the extension rod (83). A first folding rod (87) is hingedly installed on the end block (86). A second folding rod (88) is hinged to the extension block (84). The other ends of two groups of the first folding rods (87) are hinged to each other. The first folding rod (87) and the second folding rod (88) are hinged to each other at the middle position.

9. The expandable groove folding and gathering trolley according to claim 2, characterized in that: A table board component (10) is installed on the top block (15). The table board component (10) includes a table board joint (101) snap-fitted on the top block (15). A collar is arranged at the upper end of the table board joint (101), and a table rod (102) is inserted into the collar. A plurality of groups of clamping sleeves (104) are uniformly arranged along the length direction of the table rod (102). A table board (105) is snap-fitted in the clamping sleeve (104). A side sleeve (103) is sleeved on the side surface of the table board (105). A side plate (106) is installed at a position of the side sleeve (103) far from the table board (105). The side plates (106) are hingedly installed.

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