CN218287777U - Folding handcart - Google Patents

Abstract

The utility model provides a folding handcart, which comprises a frame structure and a frame structure arranged on the frame structure, wherein the frame structure comprises a front frame structure, the front frame structure comprises two front frame horizontal folding rods with folding joints in the middle, a front frame vertical rod and two front frame diagonal rods, and the two front frame horizontal folding rods are respectively rotatably connected with two side rods through a common fixing piece or an expansion fixing piece; the upper end and the lower end of the front frame upright rod are respectively connected with a folding joint; the front frame vertical rod is provided with a sliding sleeve which can slide along the length direction of the front frame vertical rod, one end of each front frame diagonal draw bar is hinged with the sliding sleeve, and one end of each front frame diagonal draw bar is hinged with the two foldable sides of the front frame horizontal rod or the two ends of the side rods respectively. The utility model forms a triangular supporting structure in the unfolding state by arranging the front frame diagonal draw bar and the front frame horizontal folding bar, so that the manufacturing state is more stable; the front frame is connected through the sliding sleeve, the diagonal draw bar drives the front frame to move, the folding process is simple and quick, the folding structure is small, and the carrying and the transportation are more convenient.

Description

A folding trolley

technical field

The utility model belongs to the technical field of trolleys, in particular to a folding trolley.

Background technique

The trolley is a convenient short-distance transportation tool driven by human push and pull. In order to facilitate storage, the trolley has gradually developed a foldable structure.

The Chinese patent with the existing publication number CN209700727U discloses a folding trolley, which includes: a pull rod assembly, a front bracket, a rear bracket, an underframe folding assembly, a side frame folding assembly, and a roller set. One end of the component is hinged to the bottom of the front bracket, and the other end is hinged to the bottom of the rear bracket. The side frame folding component is connected to both sides of the front bracket and the rear bracket, and the roller group is respectively connected to the bottom of the front bracket and the rear bracket. The pull rod assembly is connected with the front bracket, and the trolley is in the shape of a plate when it is folded, and it is in the shape of a cuboid when the trolley is opened. The above solution has the following defects: 1. It is plate-shaped after being folded, which occupies a large space, and the folding process is cumbersome, and it is not convenient for storage and carrying out; 2. The trolley does not have external components such as other trolleys and shelves for extension. function, carrying capacity is limited.

Utility model content

Aiming at the defects of the above-mentioned prior art, the purpose of this utility model is to provide a folding trolley, which is set to move with a sliding sleeve connected to the diagonal stay rod of the front frame, so that the folding process is convenient and fast, and the space occupied after folding is small.

In order to achieve the above object, the utility model provides a folding trolley, including a frame structure and a frame structure installed on the frame structure, the frame structure includes four side bars arranged in an array, and the frame structure includes a front frame structure and a rear frame structure , symmetrical side frame structure and bottom frame structure,

The front frame structure includes two front frame horizontal folding rods with folding joints in the middle, front frame vertical rods and two front frame diagonal stay rods, and the two front frame horizontal folding rods are rotatably connected to the two side rods through general fixing parts or extended fixing parts; The upper and lower ends of the front frame vertical rod are respectively connected with the folding joints; the front frame vertical rod is provided with a sliding sleeve that can slide along its length direction, one end of the two front frame diagonal rods is hinged with the sliding sleeve, and one end of the two front frame diagonal rods Hinged respectively with the foldable two sides of the front frame horizontal rod or the two ends of the side rod;

When the trolley is unfolded, the front frame diagonal rod and the front frame horizontal folding rod form a triangular support structure; when the trolley is folded, the two front frame horizontal folding rods are folded in half, the front frame vertical rod moves vertically upward, and the sliding sleeve slides along the front frame vertical rod , the front frame slanting rod draws closer to the front frame vertical rod.

Preferably: at least one group of side bars located on the same plane is provided with an expansion assembly suitable for connecting to an external component, and the external component includes at least one set of correspondingly arranged external side bars;

Wherein, the expansion assembly includes a first connecting piece installed on the side pole and a second connecting piece installed on the external side pole, and the first connecting piece is detachably connected to the second connecting piece.

And/or, the external side bar is connected with the external structure, and the expansion assembly further includes expansion fixing parts arranged at the upper and lower ends of the side bar/outside side bar, and the expansion fixing part is suitable for connecting the frame structure and the external structure, so that the folding trolley is compatible with the The outer components form a one-piece structure of common side bars/outer side bars.

Preferably: the external components include other trolleys, extended shelves and the like with the same or similar structure as the folding trolley.

As a preference: the first connecting piece is connected to the second connecting piece through a sleeve, and the first connecting piece and/or the second connecting piece are radially provided with at least one side-penetrated limiting piece to limit the first connecting piece and the second connecting piece. The second connecting pieces are disengaged from each other.

As preferred: the first connecting piece includes an insertion slot arranged in the axial direction, the second connecting piece includes a bolt and a connecting portion suitable for connecting the bolt to the external side bar, when the bolt is mated with the socket of the socket, the connection part against the top of the socket.

Preferably: the upper end of the front frame vertical rod is connected with a pull cord suitable for driving it to move upwards.

As preferred: the rear frame structure includes two rear frame horizontal rods and a rear frame X-shaped connecting rod structure including at least one set of rear frame X-shaped connecting rod units, and the rear frame X-shaped connecting rod unit includes two rear frame diagonal tie rods arranged crosswise , the top of the rear frame X-shaped connecting rod structure is rotatably connected with the side rods respectively through the rear frame horizontal rods, and the bottom end of the rear frame X-shaped connecting rod mechanism is rotatably connected with the side rods through a general fixing piece or an expanded fixing piece.

Preferably, the rear frame structure is connected with a tie rod structure, and the X-shaped connecting rod structure of the rear frame is provided with a limiting slot suitable for fixing the tie rod structure facing the tie rod structure.

As preferred: the pull rod structure includes a pull rod handle, a middle pull rod, a pull rod on both sides and a tie rod connecting seat, the pull rod handle is installed on the upper end of the middle tie rod, the middle tie rod is slidably connected to the tie rod connecting seat, and the upper ends of the pull rods on both sides are arranged symmetrically on both sides of the middle tie rod and It is hinged with the connecting seat of the pull rod, and the lower ends of the pull rods on both sides are rotatably connected with the lower ends of the side rods through the general fixing seats respectively. When the trolley is folded, the middle pull rod can be clamped to the limit card slot, making the overall structure more compact and stable after folding.

Preferably, the rear frame X-shaped connecting rod structure includes an odd number of rear frame X-shaped connecting rod units, and the limit card slot is installed at the intersection of the rear frame X-shaped connecting rod units located in the middle.

Preferably: the side frame structure includes horizontal bars on both sides of the frame and a side frame link structure including at least one set of side frame X-type link units, the side frame link unit includes two side frame diagonal stays arranged crosswise, and the side frame X The top of the X-shaped link mechanism is rotatably connected to the side bars through the horizontal bars of the side frame, and the bottom end of the X-shaped link mechanism of the side frame is rotatably connected to the side bars through a general fixing piece or an extended fixing piece.

Preferably: the bottom frame structure includes a rotation hinge and four bottom bars that are rotatably connected to the rotation hinge, and the other end of the bottom bar is rotatably connected to the four side bars through a general fixing piece or an extended fixing piece.

As preferred: the frame structure and the frame body structure form the vehicle frame of the folding trolley, and the vehicle frame is detachably installed with a trolley cloth bag with an open upper end.

The beneficial effects of the utility model are:

(1) By setting the diagonal tie rods of the front frame and the horizontal folding rods of the front frame to form a triangular support structure in the unfolded state, the finished state is made more stable; by setting the sliding sleeve to connect the diagonal tie rods of the front frame to drive its movement, the folding process is simple and fast, and the folding process is simple and fast. The rear is small in size, low in space occupation, and more convenient to carry and transport.

(2) The transportation capacity of the folding trolley is expanded by arranging an expansion component to connect external components such as another folding trolley or a shelf, so that the transportation capacity under the control of a single person is enhanced.

(3) By setting the detachable first connecting piece and the second connecting piece, the folding trolley can be easily disassembled from the external components, so that the user can choose flexibly according to the needs, the operation is simple, and it is suitable for various transportation scenarios.

(4) The folding trolley and the external components share a set of side bars or external side bars by setting the expansion fixing parts to form an integrated structure with better integrity. When the user pushes and pulls, the trolley and the external components can better maintain stability , the user has a better sense of control and experience.

Description of drawings

Fig. 1 is a schematic structural view of a folding trolley in embodiment 1.

FIG. 2 is a schematic structural view of the vehicle frame in Embodiment 1.

Fig. 3 is a structural schematic diagram of a foldable trolley towing another foldable trolley in embodiment 1.

FIG. 4 is an enlarged schematic diagram of area A in FIG. 3 .

FIG. 5 is a schematic diagram of a folded state of a foldable trolley in Embodiment 1. FIG.

FIG. 6 is a schematic structural view of a foldable trolley towed shelf in Embodiment 1. FIG.

Fig. 7 is a structural schematic diagram of a foldable trolley towing another foldable trolley in embodiment 2.

Fig. 8 is a schematic structural view of the vehicle frame in Embodiment 2.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Here, it should also be noted that, in order to avoid obscuring the utility model due to unnecessary details, only the structures and/or processing steps closely related to the solution of the utility model are shown in the drawings, and the details are omitted. Other details that have little relationship with the utility model.

Additionally, it should be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also Other elements not expressly listed, or inherent to the process, method, article, or apparatus are also included.

Example 1

As shown in Figures 1-6, a folding trolley includes a frame structure formed by four side bars 101 arranged in an array and a frame structure installed on the frame structure. The frame structure includes a front frame structure, a rear frame structure, a symmetrical The side frame structure and the bottom frame structure, the frame structure and the frame body structure form the vehicle frame of the folding trolley, and the trolley cloth cover bag 102 with an upper end opening is detachably installed on the vehicle frame.

The front frame structure includes two front frame horizontal folding rods 105 with folding joints 104 in the middle, front frame vertical rods 106 and two front frame diagonal stay rods 107. Connection; the upper and lower ends of the front frame vertical rod 106 are respectively connected with the folding joint 104; the front frame vertical rod 106 is provided with a sliding sleeve 108 that can slide along its length direction, and one end of the two front frame diagonal stay rods 107 is hinged with the sliding sleeve 108 One end of the two front frame diagonal tie rods 107 is respectively hinged with the side rod 101 through the lower fixing part 121; the upper end of the front frame vertical rod 106 is connected with a stay rope 109 suitable for driving it to move upward.

When the folding trolley is unfolded, the front frame slanting rods 107 and the front frame horizontal folding rods 105 form a triangular support structure; 106 vertically moves upwards, and sliding sleeve 108 slides down along front frame vertical bar 107, and front frame diagonal stay bar 107 moves closer to front frame vertical bar 106.

In this embodiment, an expansion assembly 300 is provided on the two side poles 101 of the plane where the front frame structure is located. The expansion assembly 300 is connected to another small folding trolley 200, which includes a set of correspondingly arranged outer sides. Rod 201 ; wherein, the extension assembly includes a first connecting piece 301 installed on the side pole 101 and a second connecting piece 302 installed on the outer side pole 201 , the first connecting piece 301 and the second connecting piece 302 are detachably connected.

In this embodiment, the first connecting piece 301 and the second connecting piece 302 are detachably connected to the side bar 101 and the outer side bar 201 respectively, so that the foldable trolley remains regular after being folded, and at the same time, the expansion assembly 300 is prevented from protruding from the set. Easy to break, the first connecting part 301 includes an insertion groove 303 arranged in the axial direction, the second connecting part 302 includes a bolt 304 and a connecting part 305 suitable for connecting the bolt 304 to the external side bar 201, when the bolt 304 is connected to the plug When the slot 303 is plugged and fitted, the connecting portion 305 is in contact with the top of the slot 303, the lower end of the pin 304 is set through the slot 303, and the lower end of the pin 303 is provided with a limiting member 306 along one radial side to limit the first The first connecting part 301 and the second connecting part 302 are separated from each other due to environmental influences such as vibration.

In this embodiment, the upper and lower ends of the side bar 101 are provided with general fixing parts connecting the frame structure, and the general fixing parts include an upper fixing part 103 arranged at the top end of the side bar 101 and a lower fixing part arranged at the bottom end of the side bar 101 121.

In this embodiment, the rear frame structure includes two rear frame horizontal rods 110 and a rear frame X-shaped linkage structure comprising a set of rear frame X-shaped linkage units, and the rear frame X-shaped linkage unit includes two cross-set rear frames Diagonal tie rod 111, the top of rear frame diagonal stay rod 111 is rotatably connected with side bar 101 through rear frame horizontal bar 110 respectively, and the bottom end of rear frame diagonal stay rod 111 is rotatably connected with side bar 101 through lower fixture 121.

In this embodiment, the side frame structure includes horizontal bars 113 on both sides of the frame and a side frame link structure including two sets of side frame X-shaped link units. The top of the side frame X-shaped linkage mechanism is rotatably connected to the side bars 101 through the side frame horizontal bars 113 , and the bottom end of the side frame X-shaped linkage mechanism is rotatably connected to the side bars 101 through the lower fixing member 121 .

In this embodiment, the bottom frame structure includes a pivot 115 and four bottom bars 116 rotatably connected to the pivot 115 , and the other end of the bottom bar 116 is rotatably connected to the four side bars 101 through a lower fixing member 121 .

In this embodiment, the rear frame structure is connected with a tie rod structure, and the tie rod structure includes a tie rod handle 117, a middle tie rod 118, two side tie rods 119 and a tie rod connecting seat 120, and the tie rod handle 117 is installed on the upper end of the middle tie rod 118, and the middle tie rod 118 and the tie rod The connecting seat 120 is slidingly connected, and the upper ends of the two pull rods 119 are symmetrically arranged on both sides of the middle tie rod 118 and are hinged with the pull rod connecting seat 120. The intersection point of the X-shaped link unit of the rear frame is connected with a limit card slot 112, and the limit card slot 112 is set facing the pull rod structure. The structure is more compact and stable.

In this embodiment, the difference between the small foldable trolley 200 and this foldable trolley is that the side frame X-shaped linkage structure of the small foldable trolley 200 only includes one set of side frame X-shaped linkage units. The folding trolley is set opposite to the front side of the small folding trolley 200 , and the outer side bar 201 is located on the plane where the front frame structure of the small folding trolley 200 is located.

As shown in FIG. 6 , in some other embodiments, the folding trolley can also be towed and connected to a shelf 202 through an expansion assembly, and the shelf 202 includes an external side bar 201 and a supporting bracket 203 connected to the bottom end of the external side bar 201 , The inner side of the supporting bracket 203 is connected with a T-shaped bracket 204 suitable for improving structural strength.

Example 2

As shown in FIGS. 7-8 , compared with Embodiment 1, the difference lies in that the foldable trolley and the small foldable trolley 200 form an integrated structure sharing the front frame structure and side bars 101 by expanding the fixing parts.

In this embodiment, the upper and lower ends of the two side bars 101 located on the plane where the front frame structure is located are respectively connected with expansion fixing parts. The expansion fixing parts include an upper expansion fixing part 307 and a lower expansion fixing part 308. The upper expansion fixing part 307 is suitable for Connect the shared front frame horizontal folding bar 105, the side frame horizontal bar 113 of the large size folding handcart and the side frame horizontal bar of the small size folding hand cart 200, and the lower expansion fixture 308 is suitable for connecting the shared front frame horizontal folding bar 105 and the front Frame diagonal stay bar 107, the side frame diagonal stay bar 114 and the bottom bar 116 of the large folding handcart and the side frame diagonal stay bar and the bottom bar of the small folding handcart 200.

The above embodiments are only used to illustrate the technical solution of the utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the utility model can be modified or Equivalent replacement without departing from the spirit and scope of the technical solution of the present utility model.

Claims (10)

1. A folding handcart comprises a frame structure and a frame body structure arranged on the frame structure, wherein the frame structure comprises four side rods arranged in an array, the frame body structure comprises a front frame structure, a rear frame structure, symmetrical side frame structures and a bottom frame structure,

the front frame structure comprises two front frame horizontal folding rods with folding joints in the middle, a front frame vertical rod and two front frame diagonal rods, and the two front frame horizontal folding rods are rotatably connected with the two side rods through common fixing pieces or expansion fixing pieces respectively; the upper end and the lower end of the front frame upright rod are respectively connected with the folding joint; the front frame upright stanchion is provided with a sliding sleeve which can slide along the length direction of the front frame upright stanchion, one end of the two front frame diagonal draw bars is hinged with the sliding sleeve, and one end of the two front frame diagonal draw bars is respectively hinged with the two foldable sides of the front frame horizontal pole or the two ends of the side pole;

when the handcart is unfolded, the front frame diagonal draw bar and the front frame horizontal folding bar form a triangular support structure; when the handcart is folded, the horizontal folding rod of the front frame is folded, the vertical upward movement of the vertical rod of the front frame is realized, the sliding sleeve slides along the vertical rod of the front frame, and the diagonal draw bar of the front frame is drawn close to the vertical rod of the front frame.

2. A foldable trolley according to claim 1, wherein at least one of said side bars in the same plane is provided with an extension member adapted to be connected to an external member, said external member comprising at least one of a corresponding set of external side bars;

the expansion assembly comprises a first connecting piece arranged on the side rod and a second connecting piece arranged on the outer side rod, and the first connecting piece is detachably connected with the second connecting piece;

and/or, the outside limit pole is connected with exterior structure, the extension subassembly still including set up in the limit pole/the extension mounting at outside limit pole's upper and lower both ends, the extension mounting is suitable for connecting frame structure with exterior structure makes folding handcart with the exterior subassembly forms the sharing limit pole/the integrative structure of outside limit pole.

3. A foldable trolley according to claim 2, wherein the first connecting member is telescopically coupled to the second connecting member, and wherein the first connecting member and/or the second connecting member is provided with at least one radially extending stop member to limit the first connecting member and the second connecting member from being disengaged from each other.

4. A folding trolley according to claim 3, characterized in that the first connecting member comprises an axially arranged plug groove, and the second connecting member comprises a pin and a connecting portion adapted to connect the pin to the outer leg, the connecting portion abutting against the top end of the plug groove when the pin is in engagement with the plug groove socket.

5. A foldable trolley according to claim 1, wherein the upper ends of the uprights of the front frame are connected to a pull cord adapted to move the uprights of the front frame upwardly.

6. A foldable trolley according to any one of claims 1 to 5, wherein the rear frame structure comprises two rear frame horizontal rods and a rear frame X-type link structure comprising at least one set of rear frame X-type link units, the rear frame X-type link units comprise two rear frame diagonal links arranged in a crossing manner, the top ends of the rear frame X-type link structures are rotatably connected to the side rods through the rear frame horizontal rods, respectively, and the bottom ends of the rear frame X-type link structures are rotatably connected to the side rods through the general fixing members or the extension fixing members.

7. A foldable trolley according to claim 6, wherein said rear frame structure is connected to a pull rod structure, and said X-shaped link structure of the rear frame is provided with a position-limiting slot adapted to fix said pull rod structure facing said pull rod structure.

8. A folding trolley according to claim 7, wherein said rear frame X-bar linkage arrangement includes an odd number of rear frame X-bar linkage elements, said limit-stop-slots being mounted at the intersection of said rear frame X-bar linkage elements in the middle.

9. A folding cart according to claim 6, wherein said side frame structure includes side frame horizontal bars and side frame link structure including at least one set of side frame X-shaped link units, said side frame link units including two side frame diagonal links arranged in a crossing manner, said side frame X-shaped link mechanisms having top ends rotatably connected to said side bars respectively via said side frame horizontal bars and bottom ends rotatably connected to said side bars via said general or extended fixing members.

10. A foldable trolley according to claim 9, wherein the base frame structure comprises a pivotal connection and four bottom rods pivotally connected to the pivotal connection, the other ends of the bottom rods being pivotally connected to four side rods by the general or extension fastening means.

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