Expansion type gathering cart

Abstract

The invention discloses an expansion type 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 expansion type gathering trolley, by arranging the external connection assembly, a curtain can be externally connected to the side vertical rods of the trolley, meanwhile, by arranging the expansion assembly and the table plate assembly, the carrying capacity of the trolley is improved, a worker can operate on the table plate conveniently, small objects are prevented from falling off, and the practicability of the trolley is improved. And meanwhile, the wheel assemblies are arranged, so that wheels are detachable 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] The present application relates to the technical field of trolleys, and in particular to an expansion-type gathering trolley. Background Art

[0002] A trolley is a transport vehicle that is pushed and pulled by manpower. It is the ancestor of all vehicles. Although the material handling technology of trolleys continues to develop, trolleys are still used as an indispensable transport tool. Trolleys are widely used in production and life because they are low in cost, simple to maintain, easy to operate, and light in weight. They can work in places where motor vehicles are inconvenient to use, and are very convenient for transporting lighter items over short distances.

[0003] For example, the patent with the publication number CN 117842156B specifically discloses a folding structure of a trolley. The patent is provided with an adjustment mechanism, which can conveniently adjust the width of the trolley when the trolley is traveling in a narrow lane so that the trolley can pass through conveniently. At the same time, the adjustment mechanism has a locking function to adapt to different lane widths.

[0004] However, in the process of using the cart, it is often necessary to apply it to some special occasions, such as as a temporary sales point, at this time it is necessary to install a roof to block the sun or prevent rain, and the temporary increase often requires the staff to add additional rods for fixing, thereby increasing the difficulty of on-site operation, so it is necessary to provide an expandable gathering cart to solve the above problems.

[0005] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide an expandable gathering cart, which solves the problem that the existing carts are difficult to expand.

[0007] The technical solution adopted by the present application to solve its technical problems is: an expansion type gathering cart, characterized in that it includes: four groups of side uprights, the upper ends of the side uprights are fixedly mounted with top blocks, and the middle of the side uprights is slidably provided with middle blocks; upper side rods, which are hingedly mounted on the top blocks; lower side rods, which are hingedly mounted on the middle blocks, and the lower side rods are hinged with the upper side rods at the middle position; a middle rod group, which has two groups of middle rods hinged with each other, and the middle rod groups are respectively hinged with the upper side rods and the lower side rods, and the two groups of middle rods are hinged at the middle position to form a second intersection; a bottom left block, which is hinged at the bottom of the side uprights on one side; a bottom right block The bottom right block is hinged at the bottom of the side upright on the other side; two groups of bottom rod groups, the bottom rod groups are respectively hinged on the bottom left block and the bottom right block, and the other end of the bottom rod group is hingedly installed with a bottom side block; a wheel assembly, which is detachably installed at the bottom of the side upright; a pull rod assembly, which is installed between the bottom side block and the second hinge point. The pull rod assembly includes an upper pull rod fixedly installed at the second hinge point, and a lower pull rod fixedly installed at the bottom side block. The upper pull rod and the lower pull rod are both vertically arranged, and a pull rod groove with an opening at the bottom end is arranged inside the upper pull rod, and a vertical waist groove is opened on the lower pull rod, and a pin is fixedly installed on the upper pull rod.

[0008] An expansion type gathering cart, characterized in that it comprises four groups of side uprights, the upper ends of the side uprights are fixedly mounted with top blocks, and the middle of the side uprights is slidably provided with middle blocks; an upper side rod, which is hingedly mounted on the top block; a lower side rod, which is hingedly mounted on the middle block, and the lower side rod is hinged with the upper side rod at a middle position; an intermediate rod group, which has two groups of middle rods hinged with each other, the intermediate rod group is hinged with the upper side rod and the lower side rod respectively, and the two groups of middle rods are hinged at a middle position to form a second intersection; a bottom left block, the bottom left block The block is hinged at the bottom of the side upright on one side; the bottom right block is hinged at the bottom of the side upright on the other side; two groups of bottom rod groups, the bottom rod groups are respectively hinged on the bottom left block and the bottom right block, and the other end of the bottom rod group is hingedly installed with a bottom side block; a wheel assembly, which is detachably installed at the bottom of the side upright; a pull rod assembly, which is installed between the bottom side block and the second hinge point. The pull rod assembly includes a single pull rod arranged between the second hinge point and the bottom side block, the upper end of the single pull rod is provided with a long waist groove, and a spring pin is passed through the second hinge point.

[0009] Furthermore, an external component is installed on the side upright, and the external component includes an external hoop arranged on the side upright, and an arc-shaped clamp is provided on the external hoop; a through rod groove is vertically provided on the external hoop, and an external rod is slidably inserted in the rod groove, and an external groove is provided on the side of the external hoop, and the external groove is connected with the rod groove, and a button is rotatably provided in the external groove, and a torsion spring is provided between the button and the external groove; an external block is sleeved on the top of the external rod, an external strip is inserted on the external block, and an external shed is installed on the external strip; a long connecting rod and a short connecting rod are inserted on the external block.

[0010] Furthermore, the wheel assembly includes a lower inner rod installed at the bottom of the side upright, the interior of the lower inner rod is provided with a mating groove that passes through the bottom along the length direction, the mating groove is square, and an insertion rod is slidably arranged inside the mating groove; a wheel frame is installed on the bottom bearing of the insertion rod, and a wheel is installed on the wheel frame.

[0011] Furthermore, the lower inner rod is located at the upper end of the matching groove and is provided with a slot with a side opening, an insert block is inserted into the slot, a horizontal slide groove is provided at the upper end of the slot, and a boss is provided on the side of the insert block; a socket is provided on the side of the side vertical rod, a receiving slot is provided at the bottom of the insert block, an elastomer is installed between the insert block and the slot, the elastomer is suitable for pushing the insert block to protrude from the socket in an initial state, and the elastomer is suitable for driving the insert block to slide into the inside of the socket when pressed; an receiving slot is provided at the bottom of the insert block, a plug is provided at the upper end of the insert rod, the plug is adapted to the receiving slot, and a step is provided at the bottom of the receiving slot.

[0012] Furthermore, an expansion component is provided at the upper end of the side upright, and the expansion component includes an expansion rod slidably arranged inside the side upright, a limiting rod is installed at the lower end of the expansion rod, and a spring is installed at the upper end of the limiting rod and the lower inner rod; a plurality of groups of guide blocks are evenly arranged along the circumferential direction at the bottom of the limiting rod, a plurality of groups of protrusions are evenly arranged along the circumferential direction inside the side upright, a plurality of groups of guide grooves are formed between the plurality of groups of protrusions, and the guide grooves match the guide blocks; a limiting groove is provided at the bottom of a group of protrusions, and a limiting portion is fixedly provided on the limiting rod above the guide block, and the limiting portion matches the limiting groove.

[0013] Furthermore, a ceiling assembly is arranged on the top of the expansion rod, and the ceiling assembly includes a connecting sleeve mounted on the top of the expansion rod, four groups of the connecting sleeves are hinged with shelf rods, and the four groups of shelf rods are hinged with shelf connecting blocks at the other end.

[0014] Furthermore, a canopy assembly is arranged on the top of the expansion rod, and the canopy assembly includes an extension rod sleeved on the expansion rod, and a curtain connection block is sleeved on the top of the extension rod, and the curtain connection block has three sets of connection ends, wherein a curtain bar is inserted into the outer connection end, and a curtain is installed on the curtain bar; a long curtain rod and a short curtain rod are inserted into the other two positions of the connection end, and the long curtain rod and the short curtain rod are used to connect and fix the four connection ends.

[0015] Furthermore, an extension assembly is installed on the bottom left block, and the extension assembly includes a cross bar hinged on the bottom left block, the cross bar is arranged along a direction perpendicular to the forward movement of the cart, and a cross block is hinged between two groups of the cross bars; an extension rod is hingedly arranged on the bottom left block along the forward movement of the cart, and the extension rod is suitable for rotating in a vertical direction; an end block is arranged at the end of the extension rod, and an extension block is slidably arranged at the middle position of the extension rod, a first folding rod is hingedly installed on the end block, and a second folding rod is hinged on the extension block, the two groups of the first folding rods are hinged to each other at the other end, and the first folding rod and the second folding rod are hinged to each other at the middle position.

[0016] Furthermore, a table top assembly is installed on the top block, and the table top assembly includes a table top joint that is snap-fitted onto the top block, a ring is provided at the upper end of the table top joint, and a table rod is inserted into the ring; a plurality of groups of sleeves are evenly provided on the table rod along the length direction, and a table top is snap-fitted into the sleeves; a side sleeve is sleeved on the side of the table top, and a side panel is installed on the side sleeve away from the table top, and the side panels are hingedly mounted.

[0017] The beneficial effects of the present application are as follows: the expandable gathering cart provided by the present application has the following beneficial effects:

[0018] 1. By providing an external component, a curtain can be connected to the side pole of the cart. At the same time, by providing an expansion component and a table component, the carrying capacity of the cart is increased to facilitate the staff to operate on the table and prevent smaller objects from falling, so that the cart can be used in different scenarios.

[0019] 2. By providing an extension component that can be folded and unfolded, the cart can be conveniently folded and stored, and can also be extended in length to facilitate the transportation of extended goods.

[0020] 3. By providing a wheel assembly, the wheel can be easily removed from the cart, thereby realizing quick release of the wheel. At the same time, when the cart is gathered, a smaller volume can be achieved, so that the cart is smaller in size when packaged.

[0021] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0023] In the attached picture:

[0024] Figure 1 This is an overall schematic diagram of an extended gathering cart in this application. Figure 1 ;

[0025] Figure 2 This is an overall schematic diagram of an extended gathering cart in this application. Figure 2 ;

[0026] Figure 3 This is an overall schematic diagram of an extended gathering cart in this application. Figure 3 ;

[0027] Figure 4 This is an overall schematic diagram of an extended gathering cart in this application. Figure 4 ;

[0028] Figure 5 for Figure 3 Schematic diagram of the local structure at A in the middle;

[0029] Figure 6 for Figure 5 A schematic diagram of the partial structure of the middle and lower inner rods and the inserts;

[0030] Figure 7 for Figure 3 Schematic diagram of the local structure at B in the middle;

[0031] Figure 8 for Figure 3 Schematic diagram of the local structure at C in the middle;

[0032] Fig. 9 for Figure 4 Schematic diagram of the local structure of the extended component;

[0033] Fig.10 for Figure 5 Schematic diagram of the internal structure of the middle and side poles and the expansion components;

[0034] Fig.11 This is an overall schematic diagram of an expansion-type gathering cart with an expanded roof in this application;

[0035] Fig.12This is an overall schematic diagram of an expandable gathering cart and an expandable canopy in this application;

[0036] Fig.13 This is an overall schematic diagram of an extended-type gathering cart with a rear door in this application;

[0037] Fig.14 This is a schematic diagram of the overall structure of an expandable gathering cart with an expansion table and an external canopy in this application;

[0038] Fig.15 This is a schematic diagram of the overall structure of an extended gathering cart with an external canopy in this application;

[0039] Fig.16 for Fig.15 Schematic diagram of the local structure at D in the middle;

[0040] Fig.17 This is a schematic diagram of the overall structure of an expandable gathering cart with an expansion table in this application;

[0041] Fig.18 for Fig.17 Schematic diagram of the local structure at E in the middle;

[0042] Among them, the reference numerals in the figure are:

[0043] 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;

[0044] 2. Tie rod assembly; 21. Upper tie rod; 22. Lower tie rod; 23. Single tie rod; 24. Long waist groove;

[0045] 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;

[0046] 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;

[0047] 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;

[0048] 6. Ceiling assembly; 61. Connecting sleeve; 62. Shed pole; 63. Shed joint block;

[0049] 7. Sky curtain assembly; 71. Curtain; 72. Curtain strips; 73. Extension rod; 74. Curtain connecting block; 75. Long curtain rod; 76. Short curtain rod;

[0050] 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;

[0051] 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;

[0052] 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

[0053] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0055] Embodiment 1:

[0056] This embodiment describes the structure and principle of the expandable gathering cart, specifically:

[0057] like Figure 1-Figure 3 As shown, the present application provides an expanded gathering cart, including a frame assembly 1, which is the basic structure of the cart and provides necessary support for the cart;

[0058] The frame assembly 1 includes four groups of side uprights 19, which are distributed around the cart to limit the load range of the cart. At the same time, a top block 15 is fixedly installed on the top of the four groups of side uprights 19, and a middle block 16 is slidably installed in the middle of the four groups of side uprights 19. Multiple groups of rods are hinged on the middle block 16 and the top block 15, and the multiple groups of rods constitute the overall frame of the cart. Specifically:

[0059] like Figure 1-Figure 3 As shown, an upper side bar 11 is hingedly installed on the top block 15 along the direction in which the cart moves forward, and the upper side bar 11 can rotate in the vertical direction along the top block 15. At the same time, a lower side bar 12 is hingedly installed on the middle block 16 along the direction in which the cart moves forward, and the lower side bar 12 can rotate in the vertical direction along the middle block 16. The lower side bar 12 and the upper side bar 11 are hinged to each other at the middle position. For the convenience of explanation, the position where the upper side bar 11 and the lower side bar 12 are hinged to each other is defined as the first hinge point, so that the upper side bar 11 and the lower side bar 12 can rotate in the vertical direction around the first hinge point and drive the middle block 16 to slide on the side stand 19.

[0060] At the same time, a middle rod 114 is hinged at the position of the upper side rod 11 and the lower side rod 12 away from the side upright rod 19. Both ends of the 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, so that the two groups of middle rods 114 can rotate in the vertical direction around the second hinge point;

[0061] In the present application, the upper side rod 11 and the lower side rod 12 hinged to each other are defined as a side rod group, and the middle rod 114 hinged to each other is defined as an intermediate rod group, so that the cart in this embodiment is composed of two groups of side rod groups and one group of intermediate rod groups, and forms a three-cross, and in the process of the middle block 16 sliding along the side vertical rod 19, the three-cross is suitable for unfolding to form a complete cart, and the three-cross is suitable for gathering for easy storage.

[0062] Continue to refer Figure 1-Figure 3 , an upper side rod 13 is hinged on the top block 15 along a position perpendicular to the forward direction of the cart, and a lower side rod 14 is hinged on the middle block 16 along a position perpendicular to the forward direction of the cart, and two groups of the upper side rods 13 and the lower side rods 14 are provided, and the ends of the upper side rods 13 are hinged to the ends of the other group of lower side rods 14, and the two adjacent groups of upper side rods 13 and lower side rods 14 are hinged at the middle position, so that as the middle block 16 slides on the side upright rods 19, the upper side rods 13 and the lower side rods 14 can rotate in the vertical direction and gather or unfold synchronously;

[0063] At the same time, a bottom left block 17 is fixedly installed at the bottom end of the left side upright rod 19, and a bottom right block 18 is fixedly installed at the bottom end of the right side upright 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 suitable for rotating in the vertical direction along the bottom left block 17 (or the bottom right block 18);

[0064] A bottom middle block 110 is hingedly installed at a position of the bottom side bar 111 away from the side vertical bar 19, and the bottom middle block 110 has four cross-shaped intersections. Therefore, in addition to the position where the bottom middle block 110 is hinged with the bottom side bar 111, a bottom middle bar 112 is hingedly installed at the other two hinged positions. For the convenience of description, a structure consisting of two sets of bottom side bars 111 hinged to each other, one bottom middle block 110 and two sets of bottom middle bars 112 is defined as a bottom bar group, and the bottom bar group can perform gathering and unfolding actions during the vertical movement of the bottom middle block 110;

[0065] In this embodiment, there are two groups of bottom rod groups, and a bottom edge block 113 is hingedly installed between the two groups of bottom rod groups. The bottom edge block 113 is respectively hinged to the bottom middle rod 112 in the two groups of bottom rod groups, so that the two groups of bottom rod groups are connected into a whole through the bottom edge block 113.

[0066] In order to improve the stability of the frame assembly 1, as Figure 2 As shown, a tie rod assembly 2 is arranged between the second hinge point and the bottom edge block 113, and 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 edge block 113, the upper tie rod 21 and the lower tie rod 22 are both arranged vertically, and a tie rod groove (not shown in the figure) with a bottom opening is arranged inside the upper tie rod 21, so that the lower tie rod 22 can slide in the vertical direction inside the upper tie rod 21 to adapt to the gathering and expansion of the frame assembly 1;

[0067] At the same time, a vertical waist groove (not marked in the figure) is opened on the lower pull rod 22, and a pin (not shown in the figure) is fixedly installed on the upper pull rod 21. The pin can slide in the waist groove, thereby limiting the sliding position of the lower pull rod 22 to prevent the lower pull rod 22 from escaping from the upper pull rod 21, and when the trolley is gathered, the lower pull rod 22 is completely received in the upper pull rod 21, so that the height of the trolley will not change after the trolley is gathered.

[0068] It should be noted that the tie rod assembly 2 can also be configured as a single tie rod. Figure 1 As shown, a single pull rod 23 is arranged between the second hinge point and the bottom edge block 113, and a long waist groove 24 is opened at the upper end of the single pull rod 23, and a spring pin (not shown in the figure) is passed through the second hinge point, so that the single pull rod 23 can be ejected by pressing the spring pin, so that the trolley can be unfolded, and the spring pin can be pressed again so that the spring pin is stuck in the long waist groove 24, so that the single pull rod 23 can be stored.

[0069] In order to make the cart movable, Figure 2 and Figure 5-Figure 6As shown, a wheel assembly 3 is provided at the bottom of each of the four sets of side uprights 19. The wheel assembly 3 includes a lower inner rod 35 fixedly mounted at the bottom of the side upright 19. A bottom-through matching groove 353 is provided inside the lower inner rod 35 along the length direction. The matching groove 353 is square in shape, and an insertion rod 33 is slidably provided inside the matching groove 353, so that the insertion rod 33 can slide inside the matching groove 353 and cannot rotate.

[0070] A wheel frame 32 is installed on the bottom bearing of the insertion rod 33, and a wheel 31 is fixedly installed on the wheel frame 32, and the wheel 31 is used to drive the cart to move;

[0071] In order to fix the insertion rod 33, as Figure 5-Figure 6 As shown, a slot 352 with a side opening is provided at the upper end of the lower inner rod 35 located at the matching groove 353, an insert block 36 is inserted inside the slot 352, and a horizontal slide groove 351 is provided at the upper end of the slot 352, and a boss 361 is provided on the side of the insert block 36, so that the insert block 36 can slide into or out of the slot 352 under the cooperation of the slide groove 351 and the boss 361;

[0072] At the same time, a plug hole 191 is provided on the side of the side upright 19, and the plug hole 191 is used to facilitate the sliding out of the plug block 36, and the boss 361 is overlapped at the plug hole 191 to fix the position of the plug block 36;

[0073] The bottom of the plug block 36 is provided with a receiving groove 362. It should be noted that an elastic body is fixedly installed between the plug block 36 and the slot 352. The elastic body is suitable for pushing the plug block 36 out of the insertion hole 191 in the initial state, so that the plug block 36 is fixed, and the elastic body is suitable for driving the plug block 36 to slide into the inside of the insertion hole 191 when pressed. At the same time, a plug 34 is fixedly arranged on the upper end of the plug rod 33. The plug 34 is adapted to the receiving groove 362, and a step (not marked in the figure) is provided at the bottom of the receiving groove 362, and a gap is provided between the plug 34 and the plug rod 33, and the gap is adapted to the step. When the plug rod 33 needs to be installed, the plug block 36 is pressed to make the plug block 36 slide into the side upright 19, and then the plug rod 33 is pushed upward until the plug 34 is located at the position of the receiving groove 362, and then the plug block 36 is released. At this time, the plug block 36 is reset under the action of the elastic body, and the plug rod 33 is fixed in the receiving groove 362.

[0074] When the insertion rod 33 needs to be removed, the insertion block 36 can be pressed again to disengage the insertion rod 33, thereby realizing the quick release of the insertion rod 33 and then the quick release of the wheel 31, so that when the frame assembly 1 is gathered, a smaller volume can be achieved, thereby making the cart smaller in size when packaged.

[0075] In order to facilitate the operation of staff, Figure 1-Figure 3 and Figure 7 As shown, a handle assembly 4 is installed on the bottom right block 18, and the handle assembly 4 is used for the staff to push the cart. The handle assembly 4 includes a hinge block 41 hinged on the bottom right block 18, and a connecting rod 42 is hinged on the hinge block 41, so that the connecting rod 42 can be flexibly rotated under the action of two intersection points;

[0076] At the same time, a junction block 46 is hingedly installed at one end of the connecting rod 42 away from the hinge block 41, and a lower handle 43 is fixedly installed on the junction block 46, and an upper handle 44 is installed on the lower handle 43, and a grip 45 is fixedly installed on the upper handle 44, so that the staff can hold the grip 45 to drive the cart to move, thereby achieving a labor-saving effect, and the connecting rod 42 and the lower handle 43 are both hingedly installed, so that when the cart is gathered, the handle assembly 4 can also be folded and gathered, thereby further reducing the volume of the cart;

[0077] A cavity (not shown) is provided at the upper end of the lower handle 43, and the upper handle 44 can slide in the cavity, so that the upper handle 44 can slide into the lower handle 43 for storage. At the same time, a spring piece 441 is provided on the upper handle 44, and a fixing hole 431 is provided on the side of the lower handle 43, so that the spring piece 441 can be inserted into the fixing hole 431 to fix the upper handle 44 in the elongated state. When it is necessary to store it, the spring piece 441 is pressed to make it enter the interior of the lower handle 43, and the upper handle 44 can slide smoothly into the cavity of the lower handle 43.

[0078] Embodiment 2:

[0079] During the use of carts, they are often used in some special occasions, such as as temporary sales points. At this time, a roof needs to be installed to block the sun or prevent rain. The temporary addition often requires the staff to add additional rods for fixing, which increases the difficulty of on-site operation.

[0080] In order to solve the above problems, Figure 4-Figure 5 and Figure 8-Figure 10 As shown, an expansion component 5 is provided at the upper end of the cart, and the expansion component 5 is used to temporarily add additional accessories to the cart to realize the application of the cart in different scenarios;

[0081] The expansion assembly 5 includes an expansion rod 53 slidably arranged inside the side upright rod 19, a limit rod 54 is fixedly installed at the lower end of the expansion rod 53, and a spring 56 is fixedly installed at the upper end of the limit rod 54 and the lower inner rod 35, so that the expansion rod 53 can slide inside the side upright 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 upright rod 19;

[0082] At the same time, a pressing head 51 is fixedly installed on the top of the expansion rod 53, and the pressing head 51 is used by the staff to spin the expansion rod 53 so that the expansion rod 53 can be extended or stored in the side stand 19;

[0083] In order to fix the expansion rod 53 when it is stored, Figure 9-10 As shown, multiple groups of guide blocks 541 are evenly arranged along the circumferential direction at the bottom of the limit rod 54, and multiple groups of protrusions (not shown in the figure) are evenly arranged along the circumferential direction inside the side stand 19, so that multiple groups of guide grooves 192 are formed between the multiple groups of protrusions. The guide grooves 192 match the guide blocks 541, so that the expansion rod 53 can slide inside the side stand 19 under the cooperation of the guide blocks 541 and the guide grooves 192;

[0084] At the same time, a limiting groove 193 is provided at the bottom of a group of protrusions, and a limiting portion 542 is fixedly provided above the limiting rod 54 on the guide block 541, and the limiting portion 542 matches the limiting groove 193, so that the limiting portion 542 can be inserted into the limiting groove 193, thereby limiting and fixing the expansion rod 53;

[0085] In summary, in the initial state, the expansion rod 53 extends out of the side rod 19 under the action of the spring 56, so as to facilitate the temporary addition of additional accessories to the cart. When the expansion rod 53 needs to be stored, the staff first presses the pressing head 51 to move the expansion rod 53 downward until the guide block 541 slides into the guide groove 192;

[0086] Continue to push the expansion rod 53 downward, so that the upper end of the guide block 541 is located at the lower end of the protrusion, and then rotate the pressing head 51 to make the expansion rod 53 rotate slightly until the limiting portion 542 is located below the limiting groove 193. At this time, the spring 56 also rotates slightly, but it will not affect the performance of the spring 56.

[0087] Then the staff releases the pressing head 51, and the limiting portion 542 springs into the limiting groove 193 under the restoring force of the spring 56, and limits and fixes the expansion rod 53 in the storage state;

[0088] When the expansion rod 53 needs to be used, the pressing head 51 is pressed and rotated again so that the guide block 541 slides and aligns with the guide groove 192 , so that the expansion rod 53 can be extended under the action of the spring 56 .

[0089] In order to fix the extension rod 53 in the extended state, Figure 8-Figure 9As shown, a snap-in groove 531 is provided on the expansion rod 53, and a snap-in hole (not marked in the figure) is provided on the side of the top block 15, in which a snap-in block 52 is snapped, and the snap-in block 52 is suitable for penetrating the side upright rod 19 and penetrating into the snap-in groove 531, so that when the expansion rod 53 is extended, the expansion rod 53 is kept fixed through the cooperation between the snap-in block 52 and the snap-in groove 531.

[0090] In this embodiment, the following application scenarios of the expansion rod 53 are provided, specifically:

[0091] like Fig.11 As 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.

[0092] like Fig.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.

[0093] 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.

[0094] Embodiment three:

[0095] 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.

[0096] In order to solve the above problems, Fig.13As 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;

[0097] 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;

[0098] 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;

[0099] Continue to refer Fig.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.

[0100] Embodiment 4:

[0101] This embodiment describes the structure and principle of the expansion type gathering cart expansion table and external canopy, specifically:

[0102] like Fig.14 and Fig.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;

[0103] like Figure 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;

[0104] 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;

[0105] 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;

[0106] At the same time, 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 the other two 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.

[0107] like Figure 17-Figure 18 As shown, the table top assembly 10 includes a table top joint 101 which is snap-fitted and mounted on the top block 15. A collar (not shown) is disposed at the upper end of the table top joint 101. A table rod 102 is inserted into the collar. The table rod 102 is disposed along the direction in which the cart moves.

[0108] At the same time, multiple groups of clamping sleeves 104 are evenly arranged along the length direction on the table rod 102, and a table board 105 is clamped on each group of clamping sleeves 104. It can be understood that the bottom of the table board 105 is set in a U shape, so that the clamping sleeve 104 can be clamped on the bottom of the table board 105 to achieve the limitation of the table board 105;

[0109] In this embodiment, the clamping sleeve 104 is made of nylon, so that it can better adapt to the bottom shape of the table top 105, thereby stably fixing the table top 105;

[0110] In order to connect multiple sets of table tops 105 into a whole, thereby enhancing the stability of the table tops 105, continue to refer to Fig.18 A side cover 103 is sleeved on the side of the table top 105, and a side panel 106 is fixedly installed at a position of the side cover 103 away from the table top 105, and multiple groups of side panels 106 are hingedly installed, so that multiple groups of table tops 105 are connected through the movable side cover 103, thereby enhancing the stability of the table top 105 to adapt to different application scenarios of the cart.

[0111] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 expansion type gathering cart, characterized in that: include: Four groups of side uprights (19), wherein a top block (15) is fixedly mounted on the upper end of each side upright (19), and a middle block (16) is slidably disposed in the middle of each side upright (19); An upper side bar (11) hingedly mounted on the top block (15); A lower side bar (12), the lower side bar (12) is hingedly mounted on the middle block (16), and the lower side bar (12) is hingedly connected to the upper side bar (11) at a middle position; An intermediate rod group, the intermediate rod group having two groups of middle rods (114) hinged to each other, the intermediate rod group being hinged to the upper side rod (11) and the lower side rod (12) respectively, the two groups of middle rods (114) being hinged at a middle position to form a second intersection point; A bottom left block (17), the bottom left block (17) is hinged to the bottom of the side upright rod (19) on one side; A bottom right block (18), the bottom right block (18) is hinged to the bottom of the side upright rod (19) on the other side; Two groups of bottom rod groups, the bottom rod groups are respectively hinged on the bottom left block (17) and the bottom right block (18), and the other end of the bottom rod group is hingedly mounted with a bottom side block (113); A wheel assembly (3), the wheel assembly (3) being detachably mounted on the bottom of the side upright (19); A pull rod assembly (2), the pull rod assembly (2) being installed between the bottom edge block (113) and the second hinge point. The pull rod assembly (2) comprises: An upper pull rod (21) fixedly mounted at the second hinge point, and a lower pull rod (22) fixedly mounted at the bottom edge block (113), wherein the upper pull rod (21) and the lower pull rod (22) are both vertically arranged, and a pull rod groove with an open bottom end is arranged inside the upper pull rod (21); The lower pull rod (22) is provided with a waist groove in a vertical direction, and the upper pull rod (21) is fixedly provided with a pin.

2. An expansion type gathering cart, characterized in that: include: Four groups of side uprights (19), wherein a top block (15) is fixedly mounted on the upper end of each side upright (19), and a middle block (16) is slidably disposed in the middle of each side upright (19); An upper side bar (11) hingedly mounted on the top block (15); A lower side bar (12), the lower side bar (12) is hingedly mounted on the middle block (16), and the lower side bar (12) is hingedly connected to the upper side bar (11) at a middle position; An intermediate rod group, the intermediate rod group having two groups of middle rods (114) hinged to each other, the intermediate rod group being hinged to the upper side rod (11) and the lower side rod (12) respectively, the two groups of middle rods (114) being hinged at a middle position to form a second intersection point; A bottom left block (17), the bottom left block (17) is hinged to the bottom of the side upright rod (19) on one side; A bottom right block (18), the bottom right block (18) is hinged to the bottom of the side upright rod (19) on the other side; Two groups of bottom rod groups, the bottom rod groups are respectively hinged on the bottom left block (17) and the bottom right block (18), and the other end of the bottom rod group is hingedly mounted with a bottom side block (113); A wheel assembly (3), the wheel assembly (3) being detachably mounted on the bottom of the side upright (19); A pull rod assembly (2), which is installed between the bottom edge block (113) and the second hinge point. The pull rod assembly (2) comprises: A single pull rod (23) is arranged between the second hinge point and the bottom edge block (113), a long waist groove (24) is opened at the upper end of the single pull rod (23), and a spring pin is passed through the second hinge point.

3. An expandable gathering cart according to claim 1 or 2, characterized in that: An external connection component (9) is installed on the side upright (19), and the external connection component (9) comprises an external connection hoop (97) arranged on the side upright (19), and an arc-shaped clamping hoop (972) is arranged on the external connection hoop (97); The external coupling hoop (97) is vertically provided with a through rod groove (973), an external rod (92) is slidably inserted in the rod groove (973), an external connecting groove (971) is provided on the side of the external coupling hoop (97), the external connecting groove (971) is connected with the rod groove (973), a button (98) is rotatably provided in the external connecting groove (971), and a torsion spring is provided between the button (98) and the external connecting groove (971); The top of the external connecting rod (92) is sleeved with an external connecting block (95), the external connecting block (95) is plugged with an external connecting bar (96), and the external connecting bar (96) is installed with an external connecting shelf (91); The external connection block (95) is plugged with a long connection rod (93) and a short connection rod (94).

4. The expandable gathering cart according to claim 1, characterized in that: The wheel assembly (3) comprises a lower inner rod (35) mounted at the bottom of the side upright rod (19), the lower inner rod (35) is provided with a bottom-through matching groove (353) along the length direction, the matching groove (353) is square, and an insertion rod (33) is slidably arranged inside the matching groove (353); A wheel frame (32) is installed on the bottom bearing of the insertion rod (33), and a wheel (31) is installed on the wheel frame (32).

5. The expandable gathering cart according to claim 4, characterized in that: The lower inner rod (35) is provided with a slot (352) with a side opening at the upper end of the matching groove (353), an insert block (36) is inserted inside the slot (352), a horizontal slide groove (351) is provided at the upper end of the slot (352), and a boss (361) is provided on the side of the insert block (36); The side of the side stand (19) is provided with an insertion hole (191), the bottom of the insertion block (36) is provided with a receiving groove (362), and an elastic body is installed between the insertion block (36) and the slot (352), the elastic body is suitable for pushing the insertion block (36) to protrude from the insertion hole (191) in the initial state, and the elastic body is suitable for driving the insertion block (36) to slide into the interior of the insertion hole (191) when pressed; A plug (34) is provided at the upper end of the insertion rod (33), the plug (34) is adapted to the receiving groove (362), and a step is provided at the bottom of the receiving groove (362).

6. The expandable gathering cart according to claim 5, characterized in that: An expansion assembly (5) is arranged at the upper end of the side upright rod (19), and the expansion assembly (5) comprises an expansion rod (53) slidably arranged inside the side upright rod (19), a limit rod (54) is installed at the lower end of the expansion rod (53), and a spring (56) is installed between the limit rod (54) and the upper end of the lower inner rod (35); The bottom of the limit rod (54) is evenly provided with multiple groups of guide blocks (541) along the circumferential direction, the inside of the side stand (19) is evenly provided with multiple groups of protrusions along the circumferential direction, multiple groups of guide grooves (192) are formed between the multiple groups of protrusions, and the guide grooves (192) match the guide blocks (541); A limiting groove (193) is arranged at the bottom of a group of protrusions, and a limiting portion (542) is fixedly arranged on the limiting rod (54) above the guide block (541), and the limiting portion (542) matches the limiting groove (193).

7. The expandable gathering cart according to claim 6, characterized in that: A ceiling assembly (6) is arranged on the top of the expansion rod (53), and the ceiling assembly (6) comprises a connecting sleeve (61) sleeved on the top of the expansion rod (53), four groups of the connecting sleeves (61) are hingedly connected to shelf rods (62), and the four groups of shelf rods (62) are hingedly connected to a shelf connection block (63) at the other end.

8. The expandable gathering cart according to claim 6, characterized in that: A canopy assembly (7) is arranged on the top of the expansion rod (53), and the canopy assembly (7) comprises an extension rod (73) sleeved on the expansion rod (53), and a curtain connection block (74) is sleeved on the top of the extension rod (73), and the curtain connection block (74) has three groups of connection ends, wherein a curtain strip (72) is inserted into the connection end located on the outer side, and a curtain cloth (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 connection end, and the long curtain rod (75) and the short curtain rod (76) are used to connect and fix the four connection ends.

9. The expandable gathering cart according to claim 1, characterized in that: An extension assembly (8) is installed on the bottom left block (17), and 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, and a cross block (82) is hinged between two groups of the cross bars (81); An extension rod (83) is hingedly provided on the bottom left block (17) along the advancing direction of the cart, and the extension rod (83) is suitable for rotating in the vertical direction; An end block (86) is provided at the end of the extension rod (83); an extension block (84) is slidably provided at the middle position of the extension rod (83); a first folding rod (87) is hingedly mounted on the end block (86); a second folding rod (88) is hingedly mounted on the extension block (84); two groups of the first folding rods (87) are hingedly mounted at the other ends; and the first folding rod (87) and the second folding rod (88) are hingedly mounted at the middle position.

10. The expandable gathering cart according to claim 2, characterized in that: A table top assembly (10) is installed on the top block (15), and the table top assembly (10) includes a table top joint (101) that is snap-fitted and installed on the top block (15), and a collar is provided at the upper end of the table top joint (101), and a table rod (102) is inserted into the collar; A plurality of sets of clamping sleeves (104) are evenly arranged on the table rod (102) along the length direction, and a table top (105) is clamped inside the clamping sleeves (104); The side of the table top (105) is sleeved with a side sleeve (103), and a side panel (106) is installed at a position of the side sleeve (103) away from the table top (105), and the side panels (106) are hingedly installed.

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