Liftable folding trolley

Abstract

The utility model belongs to the technical field of carrying trolleys, and particularly relates to a liftable folding trolley which comprises a base with wheels, a lifting support and a telescopic supporting plate, two side supports are rotationally installed on the right side of the base with the wheels, the lifting support comprises a side support supporting rod and a supporting plate fixing supporting rod, and the side support can be folded with the base with the wheels. The support rod can also be pulled up to be perpendicular to the belt wheel base and then form a triangular fixing structure with the side support rod; the liftable supporting plate, the supporting plate fixing supporting rod, the side bracket and the belt wheel base can be folded on the same plane; the procedure of using the trolley is as follows: firstly, the side bracket is pulled up, the side bracket supporting rod is wrenched for positioning and supporting, then the roller is twisted to tension the cloth belt, the right end of the supporting plate connected with the cloth belt is pulled up, and meanwhile, the left end of the supporting plate and the supporting plate fixing supporting rod are driven to be lifted in place, and then a user clamps the handle on the roller until the supporting plate is positioned in a plane; the folding chair is firm in structure and easy to fold.

Description

Technical Field

[0001] The utility model belongs to the technical field of handling trolleys, and particularly relates to a liftable and foldable trolley. Background Art

[0002] The main body of the existing four-wheel foldable trolley generally includes a trolley main body and wheels. There are certain drawbacks in use. It often has an unstable structure and is prone to bending and deformation during use or folding. Moreover, the structure is not delicate enough to achieve the purpose of saving space during folding and being convenient to carry.

[0003] Chinese Patent with the publication number CN205469169U discloses a foldable trolley, including a vehicle frame and a plurality of wheels arranged at the bottom of the vehicle frame. The vehicle frame includes a foldable bottom support frame, a foldable upper frame, a front frame and a rear frame symmetrically arranged at the front and rear ends of the bottom support frame. The middle parts of both sides of the bottom support frame and the upper frame are respectively connected by an I-shaped connecting piece.

[0004] The utility model has a complex structure and too many joints. It is prone to structural instability after being used many times and is not easy to fold. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a liftable and foldable trolley, aiming to solve the technical problems of unstable structure and not being easy to fold in the prior art.

[0006] To achieve the above purpose, a liftable and foldable trolley provided by an embodiment of the utility model includes a wheeled base, a lifting bracket and a telescopic tray. Wheels are provided at the four bottom corners of the wheeled base, and two side brackets are rotatably installed on the right side thereof. The lifting bracket includes side bracket rods and tray fixing rods, both of which are two in number. One end of the side bracket rod is fixed on the side bracket, and the other end is movably installed on the wheeled base. The tray fixing rod is rotatably installed at the left end of the telescopic tray, and the other end is coaxially rotatably installed on the wheeled base with the bottom end of the side bracket. A handle is provided at the right end of the telescopic tray. A roller is rotatably installed between the upper ends of the side brackets, and the roller is connected to the telescopic tray by a cloth belt;

[0007] When the trolley needs to be unfolded, first pull the side brackets to be perpendicular to the wheeled base, and then pull the side bracket rods to form a triangular structure with the base, the side brackets and the side bracket rods. Then, operate the roller to pull the telescopic tray upward and to the right until it is flush with the side brackets. This process also drives the tray fixing rod to rise and engages the handle on the roller; when folding, do the opposite.

[0008] Optionally, the retractable pallet, the side brackets, the side bracket rods, and the pallet fixing rods can all be folded into the same plane with the pulley base.

[0009] Optionally, the side brackets can be folded together with the pulley base, or can be pulled up to be perpendicular to the pulley base and fixed by the side bracket rods to form a triangular fixed structure.

[0010] Optionally, the side brackets rotate and fold with their lower ends as the axis and the pulley base as the base, and the maximum rotation is 90°, that is, perpendicular to the pulley base.

[0011] Optionally, the side brackets are made of square tubes.

[0012] Optionally, the pallet fixing rods are made of angle materials.

[0013] Optionally, the retractable pallet is in the shape of a flat box, hollow inside and provided with an extended tray, and the extended tray can slide within the retractable pallet.

[0014] Optionally, the left side of the extended tray is provided with a transverse wall for abutting against the left end of the retractable pallet.

[0015] Optionally, one end of the roller is provided with a handle for controlling its own rotation.

[0016] Optionally, the two wheels on one side of the pulley base where the side brackets are located are both provided with liftable feet.

[0017] One or more of the above technical solutions in the liftable folding handcart provided by the embodiments of the present invention have at least one of the following technical effects: adopting the structure of this utility model, the structure is simple and firm, and it is convenient to fold and store; when folding, the liftable pallet, the pulley base, the side brackets and the pallet fixing rods can all be folded in the same plane, which is convenient for storage; when unfolding, the side brackets, the side bracket rods and the pulley base can form a triangular fixed structure, which is stable and reliable, and the operation is also easy. Just first pull up the side brackets and fix them with the side bracket rods, then use the roller to lift the retractable pallet, and at the same time drive the pallet fixing bracket to rise. After in place, then buckle the handle on the roller to realize the horizontal positioning of the pallet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the liftable and foldable trolley provided by the embodiment of the present utility model;

[0020] Figure 2 Folding state diagram of the hidden wheels of the liftable and foldable trolley provided by the embodiment of the present utility model;

[0021] Figure 3 Top view of the folding state of the hidden wheels of the liftable and foldable trolley provided by the embodiment of the present utility model;

[0022] Figure 4 is Figure 3 Cross-sectional view along A-A.

[0023] Among them, each reference numeral in the figure:

[0024] 10, pulley base; 11, wheels; 111, footrest; 12, side bracket; 13, roller; 131, handle; 20, lifting bracket; 21, side bracket support rod; 22, pallet fixing support rod; 30, telescopic pallet; 31, handle; 32, extended pallet; 321, cross wall. Detailed implementation manners

[0025] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the embodiments of the present utility model, and should not be construed as a limitation to the present utility model.

[0026] In the description of the embodiments of the present utility model, it should be understood that if there are directional indications involved in the embodiments of the present utility model, such as upper, lower, left, right, front, rear, inner, outer, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0028] In the embodiments of the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "linkage", and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0029] In one embodiment of the present utility model, as Figures 1 to 4 shown, a liftable and foldable trolley is provided, including a wheeled base 10, a lifting strut 20, and a telescopic tray 30. The wheeled base 10 is a box structure, and wheels 11 are provided at its four feet. It should be noted here that the types of the wheels 11 are not limited. Preferably, universal wheels are selected to facilitate the flexible change of the direction of the trolley during use. At both ends of the right side of the wheeled base 10, two side brackets 12 are rotatably installed. The lifting bracket 20 includes side bracket struts 21 and tray fixing struts 22, both in two numbers. One end of the side bracket strut 21 is rotatably installed on the side bracket 12, and the other end is movably installed on the wheeled base 10. One end of the tray fixing strut 22 is rotatably installed at the left end of the telescopic tray 30, and the other end is coaxially rotatably installed on the wheeled base 10 with the bottom end of the side bracket 12. A handle 31 is provided at the right end of the telescopic tray 30. When the trolley is unfolded, the handle 31 can be buckled on the roller 13. A roller 13 is rotatably installed between the upper ends of the side brackets 12. One end of the roller 13 is provided with a handle 131 for operating the roller 13 itself. The roller 13 is connected to the telescopic tray 30 through a cloth belt.

[0030] Preferably, the side brackets 12, the side bracket struts 21, and the tray fixing struts 22 can all be folded to the same plane as the wheeled base 10, so as to occupy as little space as possible when not in use and for storage.

[0031] Preferably, the side bracket 12 can be folded with the wheeled base 10, or can be pulled up to be perpendicular to the wheeled base 10 and fixed by the side bracket strut 21 to form a triangular fixed structure.

[0032] Preferably, the side bracket 12 rotates and folds with its lower end as the axis and the wheeled base 10 as the bottom edge, and the maximum rotation angle is 90°, that is, it is perpendicular to the wheeled base 10, so as to play a supporting role.

[0033] Preferably, the material of the side bracket 12 is a square tube, so that the side bracket 12 has good force-bearing performance. The material of the tray fixing strut 22 is an angle bar, which is convenient for folding in cooperation with other components.

[0034] Preferably, the retractable tray 30 has a flat box structure, is hollow inside and is provided with an extended tray 32. A transverse wall 321 for abutting against the left end of the retractable tray 30 is provided on the left side of the extended tray 32. When the extended tray 32 needs to be used, grasp the transverse wall 321 by hand and pull out the extended tray 32. When it is not needed, push the transverse wall 321 by hand until the extended tray 32 abuts against the left end of the retractable tray 30.

[0035] Preferably, the wheels 11 of the pulley base 10 located on one side of the side bracket 12 are provided with two liftable feet 111. When the trolley needs to be moved, lift the feet 111. When the trolley needs to be stopped and remain stationary, lower the feet 111 to the ground, thereby fixing the trolley.

[0036] Working principle: When the trolley needs to be unfolded, first pull up the side bracket 12 until it is perpendicular to the pulley base 10, and pull the side bracket support rod 21 to position it, so that the pulley base 10, the side bracket 12 and the side bracket support rod 21 form a triangular stable structure. Use the handle to operate the roller 13 to tighten the cloth belt, lift the right end of the retractable tray 30 connected to the cloth belt, and then drive the tray fixing rod 22 to rise. At the same time, the left end of the retractable tray 30 is driven to rise. During this process, the operator can grasp the handle 31, place it on the roller 13 and buckle the handle 31 on it. At this point, the retractable tray 30 is positioned on a plane. And during the process of pushing the trolley forward, if it needs to stop and remain stationary, lower the feet 111 to keep the trolley stationary; when it needs to be folded, just operate in the reverse direction.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A liftable and foldable trolley, characterized in that, It includes a pulley base (10), a lifting bracket (20) and a telescopic tray (30). Wheels (11) are provided at the four bottom corners of the pulley base (10), and two-side brackets (12) are rotatably installed on the right side thereof. The lifting bracket (20) includes side bracket rods (21) and tray fixing rods (22), and the number of each is two. One end of the side bracket rod (21) is fixed on the side bracket (12), and the other end is movably installed on the pulley base (10). The tray fixing rod (22) is rotatably installed at the left end of the telescopic tray (30), and the other end is coaxially rotatably installed on the pulley base (10) with the bottom end of the side bracket (12). A handle (31) is provided at the right end of the telescopic tray (30). A roller (13) is rotatably installed between the upper ends of the side brackets (12), and the roller (13) is connected to the telescopic tray (30) by a cloth belt. When the trolley needs to be unfolded, first pull the side bracket (12) until it is perpendicular to the pulley base (10), and then pull the side bracket rod (21) to form a triangular structure with the pulley base (10), the side bracket (12) and the side bracket rod (21). Then, operate the roller (13) to pull the telescopic tray (30) upward and to the right until it is flush with the side bracket (12). This process also drives the tray fixing rod (22) to rise and engages the handle (31) on the roller (13). When folding is required, the reverse operation is performed.

2. The liftable and foldable trolley according to claim 1, wherein, The telescopic tray (30), the side bracket (12), the side bracket rod (21) and the tray fixing rod (22) can all be folded with the pulley base (10) into the same plane.

3. The liftable and foldable trolley according to claim 1, wherein, The side bracket (12) can be folded with the pulley base (10) or pulled up to be perpendicular to the pulley base (10) and fixed by the side bracket rod (21) to form a triangular fixed structure.

4. The liftable and foldable trolley according to claim 1, wherein, The side bracket (12) rotates and folds with its lower end as the axis and the pulley base (10) as the base, and the maximum rotation is 90°, that is, it is perpendicular to the pulley base (10).

5. The liftable and foldable trolley according to claim 1, characterized in that The side bracket (12) is made of square pipe.

6. The liftable and foldable trolley according to claim 1, characterized in that, The tray fixing rod (22) is made of angle steel.

7. The liftable and foldable trolley according to claim 1, wherein The telescopic tray (30) is in the shape of a flat box, hollow inside and provided with an extended tray (32), and the extended tray (32) can slide inside the telescopic tray (30).

8. The liftable and foldable trolley according to claim 7, characterized in that, A transverse wall for abutting against the left end of the telescopic tray (30) is provided on the left side of the extended tray (32).

9. The liftable and foldable trolley according to claim 1, wherein, A handle (131) for operating the rotation of the roller (13) itself is provided at one end of the roller (13).

10. The liftable and foldable trolley according to claim 1, wherein, The two wheels (11) on one side of the pulley base (10) where the side bracket (12) is located are both provided with liftable feet (111).

Images