Pull rod structure of gathering trolley

Abstract

The invention discloses a pull rod structure of a gathering trolley, and belongs to the technical field of trolleys. The device mainly comprises a frame assembly which is provided with a bottom right block. A wheel assembly; the handle assembly comprises a hinge block hinged to the bottom right block, and a connecting rod is hinged to the hinge block; the telescopic rod is inserted into the connecting rod in a sliding manner; the junction block is hinged to the telescopic rod; the lower handle is inserted into the junction block in a sliding manner; the upper handle is inserted into the lower handle in a sliding manner; a bolt penetrates through the connecting rod, and a long waist groove is formed in the telescopic rod. According to the pull rod structure of the gathering trolley, by arranging the handle assembly capable of being completely folded, when the trolley is stored, the handle assembly can be completely stored and attached to the side face of the trolley, so that the occupied space of the trolley is further reduced, meanwhile, by arranging the wheel assembly, wheels can be detached when the trolley is gathered, and the trolley is convenient to use. And the trolley does not rise at all, so that 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 a pull rod structure for a 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, when the cart is folded and stored, only the body of the cart can be folded, and the pull rod part cannot be adjusted, so that the longer pull rod will take up more space, resulting in a poor folding effect of the cart, and sometimes affecting the overall storage of the cart. Therefore, it is necessary to provide a pull rod structure for gathering the 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 a folding trolley pull rod structure, which solves the problem that the existing trolley pull rods are not easy to fold and store.

[0007] The technical solution adopted by the present application to solve its technical problems is: a pull rod structure of a gathering trolley, including a frame assembly, which provides support for the gathering trolley, and the frame assembly has a bottom right block; a wheel assembly, which is detachably mounted on the bottom of the frame assembly; a handle assembly, which includes a hinge block hinged on the bottom right block, a connecting rod hinged on the hinge block; a telescopic rod slidably inserted inside the connecting rod; a junction block hinged on the telescopic rod; a lower handle slidably inserted on the junction block; and an upper handle slidably inserted inside the lower handle; a pin is passed through the connecting rod, and a long waist groove is opened on the telescopic rod.

[0008] Furthermore, a top plug is fixedly mounted on the upper end of the lower handle, a bottom plug is fixedly mounted on the lower end of the lower handle, a pin hole is provided on the bottom plug, an elastic body is fixedly mounted inside the pin hole, and a marble is fixedly mounted on the elastic body.

[0009] Furthermore, a pressing portion is slidably provided at the inner upper end of the upper handle, a through rod is fixedly installed at the bottom of the pressing portion, a driving sleeve is fixedly installed at the bottom of the through rod, and two groups of inclined blocks are provided at the bottom of the driving sleeve, and the two groups of inclined blocks are arranged in a vertical downward direction, with relative surfaces away from each other.

[0010] Furthermore, a middle plug is fixedly provided at the inner upper end of the lower handle, two groups of sliders are horizontally slidably provided at the upper end of the middle plug, a second spring is fixedly installed between the two groups of sliders, and notches are provided on both sides of the upper handle.

[0011] Furthermore, a transition slope is provided on the sliding block, and the transition slope is adapted to the inclined block; and a first spring is installed between the middle plug and the driving sleeve.

[0012] Furthermore, the frame assembly includes four groups of side uprights, the upper ends of which are fixedly mounted with top blocks, and the middle blocks are slidably arranged in the middle of the side uprights; 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 to the upper side rod at a middle position; a middle rod group, which has two groups of middle rods hinged to each other, and the middle rod groups are respectively hinged to the upper side rod and the lower side rod, and the two groups of middle rods are hinged at a middle position to form a second hinge point; a bottom left block, which is hinged to the bottom of the side upright on one side; the bottom right block is hinged to the bottom of the side upright on the other side; two groups of bottom rod groups, which are respectively hinged to the bottom left block and the bottom right block, and the other end of the bottom rod group is hingedly mounted with a bottom side block.

[0013] 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.

[0014] Furthermore, the lower inner rod is provided with a slot with a side opening at the upper end of the matching groove, an insert block is inserted into the inside of 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 groove 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; a plug is provided at the upper end of the insert rod, the plug is adapted to the receiving groove, and a step is provided at the bottom of the receiving groove.

[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 pull rod assembly is installed between the bottom edge block and the second hinge point, and 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 edge block, the upper pull rod and the lower pull rod are both vertically arranged, and a pull rod groove with a bottom end opening is arranged inside the upper pull rod;

[0017] The lower pull rod is provided with a waist groove in a vertical direction, and the upper pull rod is fixedly provided with a pin.

[0018] The beneficial effects of the present application are as follows: the present application provides a pull rod structure for a gathering trolley, which has the following advantages:

[0019] Beneficial effects:

[0020] 1. By providing a fully foldable handle assembly, the handle assembly can be completely folded and fits against the side of the cart when the cart is stored, thereby further reducing the space occupied by the cart.

[0021] 2. 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.

[0022] 3. 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.

[0023] 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

[0024] 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.

[0025] In the attached picture:

[0026] Figure 1 The overall schematic diagram of a pull rod structure of a gathering trolley in this application Figure 1 ;

[0027] Figure 2 The overall schematic diagram of a pull rod structure of a gathering trolley in this application Figure 2 ;

[0028] Figure 3 for Figure 2 Schematic diagram of the local structure at A in the middle;

[0029] Figure 4 for Figure 3 A schematic diagram of the partial structure of the middle and lower inner rods and the inserts;

[0030] Figure 5 for Figure 1 A schematic diagram of the structure of the tie rod assembly;

[0031] Figure 6 for Figure 5 A schematic cross-sectional view of the middle tie rod assembly;

[0032] Figure 7 for Figure 6 Schematic diagram of the local structure at B in the middle;

[0033] Figure 8 for Figure 6 Schematic diagram of the local structure at C in the middle;

[0034] Fig. 9 for Figure 6 Schematic diagram of the local structure at D in the middle;

[0035] Fig.10 for Figure 8 Another schematic diagram of the structure in the middle;

[0036] Fig.11This is a schematic diagram of a rear-opening door structure of a gathering trolley pull rod structure in this application;

[0037] Among them, the reference numerals in the figure are:

[0038] 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; 110. Bottom middle block; 111. Bottom side bar; 112. Bottom middle bar; 113. Bottom side block; 114. Middle bar;

[0039] 2. Tie rod assembly; 21. Upper tie rod; 22. Lower tie rod;

[0040] 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;

[0041] 4. Handle assembly; 41. Articulated block; 42. Connecting rod; 43. Lower handle; 44. Upper handle; 45. Grip; 46. Junction block; 47. Telescopic rod; 471. Long waist groove; 48. Bottom plug; 481. Pin hole; 49. Latch; 410. Top plug; 411. Through rod; 412. Driving sleeve; 413. First spring; 414. Sliding block; 415. Transition slope; 416. Second spring; 417. Middle plug; 418. Pressing part; 420. Oblique block;

[0042] 5. Extension assembly; 51. Cross bar; 52. Cross block; 53. Extension rod; 54. Extension block; 56. End block; 57. First folding rod; 58. Second folding rod. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] Embodiment 1:

[0046] This embodiment describes the structure and principle of the expandable gathering cart, specifically:

[0047] like Figure 1-Figure 2 As shown, the present application provides a pull rod structure for a gathering trolley, including a frame assembly 1, which is the basic structure of the trolley and provides necessary support for the trolley;

[0048] 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:

[0049] 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.

[0050] 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;

[0051] 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.

[0052] 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;

[0053] 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);

[0054] 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;

[0055] 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.

[0056] In order to improve the stability of the frame assembly 1, as Figure 1 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;

[0057] At the same time, a vertical waist groove (not shown 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 trolleys are 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 trolleys are gathered;

[0058] In this embodiment, the shapes of the upper pull rod 21 and the lower pull rod 22 are not limited, and can be round tubes, flat round tubes, or iron sheets or other shapes, as long as the lower pull rod 22 can slide inside the upper pull rod 21.

[0059] In order to make the cart movable, Figure 2 and Figure 3-Figure 4 As 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.

[0060] 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;

[0061] In order to fix the insertion rod 33, as Figure 3-Figure 4 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;

[0062] 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;

[0063] 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.

[0064] 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.

[0065] In order to facilitate the operation of staff, Figure 1-Figure 2 and Figure 5 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;

[0066] At the same time, an accommodating cavity (not shown in the figure) is provided at one end of the connecting rod 42 away from the hinge block 41, and a telescopic rod 47 is movably inserted in the accommodating cavity. The telescopic rod 47 is suitable for extending out of the accommodating cavity to extend the connecting rod 42, and the telescopic rod 47 is suitable for being received in the accommodating cavity to reduce the occupied volume;

[0067] It should be noted that if Figure 7 As shown, a latch 49 is provided on the connecting rod 42, and a long waist groove 471 is provided on the telescopic rod 47, so that the latch 49 can slide in the long waist groove 471 to guide the extension and storage of the telescopic rod 47;

[0068] In this embodiment, the shapes of the connecting rod 42 and the telescopic rod 47 are not limited, and can be round tubes, flat round tubes, or iron sheets or other shapes, as long as the telescopic rod 47 can be telescoped within the connecting rod 42.

[0069] like Figure 6-Figure 9As shown, a junction block 46 is hingedly mounted on one end of the two sets of telescopic rods 47 away from the connecting rod 42, so that the two sets of telescopic rods 47 can rotate around the junction block 46 to facilitate separation from each other for work and close to each other for storage;

[0070] At the same time, a lower handle 43 is slidably provided on the junction block 46, and a bottom plug 48 is fixedly installed at the bottom end of the lower handle 43, and the bottom plug 48 is used to limit the position of the lower handle 43 to prevent the lower handle 43 from escaping upward from the junction block 46, and a top plug 410 is fixedly installed at the upper end of the lower handle 43, and the top plug 410 is used to prevent the lower handle 43 from escaping downward. It can be understood that the lower handle 43 can slide on the junction block 46, and when the top plug 410 contacts the junction block 46, the lower handle 43 is in a retracted state, and when the bottom plug 48 contacts the junction block 46, the lower handle 43 is in an extended state;

[0071] A pin hole 481 is provided on the bottom plug 48, an elastic body (not shown in the figure) is fixedly installed inside the pin hole 481, and a marble (not shown in the figure) is fixedly installed on the elastic body. The marble is suitable for contacting the inner wall of the junction block 46, so that when the lower handle 43 is in an extended state, the marble can be supported on the junction block 46 to limit the position of the lower handle 43;

[0072] Continue to refer Figure 6-Figure 9 An upper handle 44 is slidably provided inside the lower handle 43, and the upper handle 44 is suitable for extending out of the lower handle 43 and being received inside the lower handle 43. At the same time, a grip 45 is fixedly installed on the upper end of the upper handle 44 to facilitate operation by the staff;

[0073] In order to extend and store the upper handle 44, Figure 8-Figure 10 As shown, a pressing portion 418 is slidably provided at the inner upper end of the upper handle 44, a through rod 411 is fixedly installed at the bottom of the pressing portion 418, a driving sleeve 412 is fixedly installed at the bottom of the through rod 411, and two groups of inclined blocks 420 are provided at the bottom of the driving sleeve 412. The two groups of inclined blocks 420 are arranged in a vertical downward direction, and the opposite surfaces of the two groups of inclined blocks 420 are away from each other, so that the staff can drive the pressing portion 418 to move downward, thereby driving the two groups of inclined blocks 420 to move downward synchronously, and then the positions of the opposite surfaces of the two groups of inclined blocks 420 are close to each other;

[0074] At the same time, a middle plug 417 is fixedly provided at the inner upper end position of the lower handle 43, and two groups of sliders 414 are horizontally slidably provided at the upper end of the middle plug 417, and a second spring 416 is fixedly installed between the two groups of sliders 414, so that in the initial state, the two groups of sliders 414 are separated from each other and form a block to the upper handle 44 at the upper end, so that the upper handle 44 cannot slide in the lower handle 43. It should be noted that notches (not shown in the figure) are provided on both sides of the upper handle 44, so that in the initial state, the sliders 414 can be stuck in the notches to form a block to the upper handle 44;

[0075] A transition slope 415 is provided on the slider 414, and the transition slope 415 is adapted to the inclined block 420, so that when the two groups of inclined blocks 420 move downward, the slider 414 is squeezed by the transition slope 415, so that the two groups of sliders 414 are close to each other, so that the upper handle 44 passes over the slider 414 and slides downward in the lower handle 43;

[0076] Meanwhile, a first spring 413 is fixedly installed between the middle plug 417 and the drive sleeve 412, and the first spring 413 is suitable for pressing, so that the drive sleeve 412 moves downward;

[0077] In summary, when the staff member presses the pressing portion 418, the driving sleeve 412 can be driven to move downward, and the inclined block 420 can be driven to move downward simultaneously, so that the two sets of sliders 414 are close to each other and come out of the notch. At this time, the upper handle 44 can slide downward inside the lower handle 43, thereby completing the storage of the upper handle 44.

[0078] At the same time, the staff can manually pull the upper handle 44 so that the upper handle 44 extends out from the lower handle 43 and the slider 414 is inserted into the notch to limit the upper handle 44. At this time, the staff can drive the cart by operating the upper handle 44.

[0079] Embodiment 2:

[0080] 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.

[0081] In order to solve the above problems, Fig.10As shown, an extension assembly 5 is installed on the bottom left block 17, and the extension assembly 5 is used to extend the cart so as to carry longer goods. The extension assembly 5 includes a cross bar 51 hinged on the bottom left block 17, and the cross bar 51 is arranged along a direction perpendicular to the forward movement of the cart. At the same time, a cross block 52 is hinged between two groups of cross bars 51, so that the cross block 52 can move in the vertical direction to drive the two groups of cross bars 51 to gather or unfold together with the cart;

[0082] In this embodiment, because the cart is supported by two sets of cross bars 51, 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;

[0083] At the same time, an extension rod 53 is hingedly provided on the bottom left block 17 along the forward direction of the cart, and the extension rod 53 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;

[0084] Continue to refer Fig.10 An end block 56 is provided at the end of the extension rod 53, and an extension block 54 is slidably provided at the middle position of the extension rod 53. At the same time, a first folding rod 57 is hingedly installed on the end block 56, and a second folding rod 58 is hingedly installed on the extension block 54. The two groups of first folding rods 57 are hinged to each other at the other ends, and the first folding rod 57 and the second folding rod 58 are hinged to each other at the middle position, so that the two groups of extension rods 53 can be folded and stored together, and unfolded to carry extended goods.

[0085] 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 be modified and varied. 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. A pull rod structure for a gathering trolley, characterized in that: include: A frame assembly (1) providing support for the gathering trolley, the frame assembly (1) having a bottom right block (18); A wheel assembly (3), the wheel assembly (3) being detachably mounted on the bottom of the frame assembly (1); A handle assembly (4), the handle assembly (4) comprising: A hinge block (41) hinged on the bottom right block (18), wherein a connecting rod (42) is hinged on the hinge block (41); A telescopic rod (47) slidably inserted into the interior of the connecting rod (42); A junction block (46) hinged on the telescopic rod (47); A lower pull handle (43) slidably plugged into the junction block (46); and An upper handle (44) slidably inserted into the lower handle (43); Wherein, a latch pin (49) is provided on the connecting rod (42), and a long waist groove (471) is provided on the telescopic rod (47).

2. A pull rod structure for a gathering trolley according to claim 1, characterized in that: A top plug (410) is fixedly mounted on the upper end of the lower handle (43), a bottom plug (48) is fixedly mounted on the lower end of the lower handle (43), a pin hole (481) is provided on the bottom plug (48), an elastic body is fixedly mounted inside the pin hole (481), and a marble is fixedly mounted on the elastic body.

3. A pull rod structure for a gathering trolley according to claim 2, characterized in that: A pressing portion (418) is slidably provided at the inner upper end of the upper handle (44), a through rod (411) is fixedly installed at the bottom of the pressing portion (418), a driving sleeve (412) is fixedly installed at the bottom of the through rod (411), and two groups of inclined blocks (420) are provided at the bottom of the driving sleeve (412), and the two groups of inclined blocks (420) are arranged in a vertical downward direction, and the relative surfaces are away from each other.

4. The pull rod structure of a gathering trolley according to claim 3, characterized in that: A middle plug (417) is fixedly provided at the inner upper end of the lower handle (43), two groups of sliders (414) are horizontally slidably provided at the upper end of the middle plug (417), a second spring (416) is fixedly installed between the two groups of sliders (414), and notches are provided on both sides of the upper handle (44).

5. The pull rod structure of a gathering trolley according to claim 4, characterized in that: The sliding block (414) is provided with a transition slope (415), and the transition slope (415) is adapted to the inclined block (420); A first spring (413) is installed between the middle plug (417) and the drive sleeve (412).

6. The pull rod structure of a gathering trolley according to claim 5, characterized in that: The frame assembly (1) comprises: 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; 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 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).

7. The pull rod structure of a gathering trolley according to claim 6, 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).

8. The pull rod structure of a gathering trolley according to claim 7, 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).

9. The pull rod structure of a gathering trolley according to claim 5, characterized in that: An extension assembly (5) is installed on the bottom left block (17), and the extension assembly (5) comprises a cross bar (51) hinged on the bottom left block (17), and the cross bar (51) is arranged along a direction perpendicular to the forward movement of the cart, and a cross block (52) is hinged between two groups of the cross bars (51); An extension rod (53) is hingedly provided on the bottom left block (17) along the advancing direction of the cart, and the extension rod (53) is suitable for rotating in the vertical direction; An end block (56) is provided at the end of the extension rod (53); an extension block (54) is slidably provided at the middle position of the extension rod (53); a first folding rod (57) is hingedly mounted on the end block (56); a second folding rod (58) is hingedly mounted on the extension block (54); two groups of the first folding rods (57) are hingedly mounted at the other ends; and the first folding rod (57) and the second folding rod (58) are hingedly mounted at the middle position.

10. The pull rod structure of a gathering trolley according to claim 5, characterized in that: A pull rod assembly (2) is installed between the bottom edge block (113) and the second hinge point, and 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.

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