A folding trolley

Abstract

The present invention discloses a folding trolley, which includes an upper crossbar, a lower crossbar, a left telescopic rod, a right telescopic rod, a left bottom frame, a right bottom frame, wheels, a left side frame, a right side frame, a left side rod and a right side rod; the left and right ends of the upper crossbar are respectively hinged to the left side frame and the right side frame, the left and right ends of the lower crossbar are respectively hinged to the left bottom frame and the right bottom frame, limiting connecting pieces are respectively arranged at the two ends of the upper crossbar and the two ends of the lower crossbar, the upper end of the left telescopic rod is hinged to the left end of the upper crossbar, the lower end of the left telescopic rod is hinged to the left end of the left bottom frame, the upper end of the right telescopic rod is hinged to the right end of the upper crossbar, the lower end of the right telescopic rod is hinged to the right end of the right bottom frame, the upper and lower ends of the left side rod are respectively hinged to the middle of the left side frame and the left end of the left bottom frame, and the upper and lower ends of the right side rod are hinged to the middle of the right side frame and the right end of the right bottom frame. The folding trolley of the present invention is simple and convenient, and increases the load-carrying capacity of the folding trolley without affecting the volume after folding, and is convenient for storage and handling.

Description

Technical Field

[0001] The present invention relates to a trolley, and more particularly to a folding trolley. Background Art

[0002] With the continuous improvement of people's quality of life, during their spare time outside of work, people often need to go camping and vacation. When carrying out outdoor activities, in order to more conveniently transport a large amount of activity supplies, people usually choose to use a trolley for short-distance transportation. In order to facilitate storage and carrying, existing folding portable trolleys are generally designed to be more compact. Therefore, the space after the portable trolley is unfolded is limited, and the load-carrying capacity is weak. Summary of the Invention

[0003] The purpose of the present invention is to propose a folding trolley to solve the above problems.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A folding trolley includes an upper crossbar, a lower crossbar, a left telescopic rod, a right telescopic rod, a left bottom frame, a right bottom frame, wheels, a left side frame, a right side frame, a left side rod and a right side rod;

[0006] The left end of the upper crossbar is hinged to the left side frame, the right end of the upper crossbar is hinged to the right side frame, the left end of the lower crossbar is hinged to the left bottom frame, the right end of the lower crossbar is hinged to the right bottom frame. Limited position connecting pieces are respectively arranged at the hinged parts at the left and right ends of the upper crossbar and the left and right ends of the lower crossbar. The cross-section of the limited position connecting piece is a portal structure. The limited position connecting pieces are respectively used to limit the unfolding angles of the upper crossbar, the left side frame and the right side frame, and limit the unfolding angles of the lower crossbar, the left bottom frame and the right bottom frame;

[0007] The upper end of the left telescopic rod is hinged to the left end of the upper crossbar, the lower end of the left telescopic rod is hinged to the left end of the left bottom frame, the upper end of the right telescopic rod is hinged to the right end of the upper crossbar, the lower end of the right telescopic rod is hinged to the right end of the right bottom frame. There are at least three wheels, and the wheels are respectively arranged on the bottom surfaces of the left bottom frame and the right bottom frame;

[0008] The upper end of the left side rod is hinged to the middle of the left side frame, the lower end of the left side rod is hinged to the left end of the left bottom frame, the upper end of the right side rod is hinged to the middle of the right side frame, and the lower end of the right side rod is hinged to the right end of the right bottom frame.

[0009] In the folding trolley, a fork rod assembly is further included. The fork rod assembly is in an "X" shape, and the two left ends of the fork rod assembly are respectively hinged to the left end of the upper cross bar and the left end of the lower cross bar, and the two right ends of the fork rod assembly are respectively hinged to the right end of the upper cross bar and the right end of the lower cross bar.

[0010] In the folding trolley, a load-carrying cross plate is fixedly connected to the left bottom frame and the right bottom frame.

[0011] In the folding trolley, a storage bag is further included. The storage bag is made of canvas. When the folding trolley is unfolded, the storage bag encloses a storage space inside the folding trolley. Fixing ears are provided at positions close to the upper cross bar, the left frame, the right frame, the left side rod, and the right side rod of the storage bag. The upper cross bar, the left frame, the right frame, the left side rod, and the right side rod respectively pass through the corresponding fixing ears to fix the storage bag to the folding trolley.

[0012] In the folding trolley, a storage cross plate is detachably connected to the left frame and the right frame. A plurality of fixing clips adapted to the left frame and the right frame are provided below the storage cross plate, and the fixing clips are clamped on the left frame or the right frame.

[0013] In the folding trolley, the right frame further includes a pull rod, and the pull rod is hinged to the right side surface of the right frame.

[0014] In the folding trolley, the length of the left frame is less than the maximum length of the left telescopic rod, the length of the right frame is less than the maximum length of the right telescopic rod, and the sum of the length of the right frame and the pull rod is less than the maximum length of the right telescopic rod.

[0015] In the folding trolley, the left telescopic rod includes a first outer rod, a second outer rod, and a first inner rod. The lower end of the first outer rod is hinged to the left end of the left bottom frame. One end of the first inner rod is sleeved inside the first outer rod, and the other end is fixedly connected to the lower end of the second outer rod. The upper end of the second outer rod is hinged to the left end of the upper cross bar.

[0016] In the folding trolley, the right telescopic rod includes a third outer rod, a fourth outer rod, and a second inner rod. The lower end of the third outer rod is hinged to the right end of the right bottom frame. One end of the second inner rod is sleeved inside the third outer rod, and the other end is fixedly connected to the lower end of the fourth outer rod. The upper end of the fourth outer rod is hinged to the left end of the upper cross bar.

[0017] In the folding trolley, the wheels are universal wheels.

[0018] The beneficial effects of the present invention are:

[0019] 1. Through the cooperation of the fork rod assembly, upper cross bar, lower cross bar, left telescopic rod, right telescopic rod, left bottom frame, right bottom frame, left side frame, right side frame, left side rod and right side rod, when the folding trolley is unfolded, it has a large loading space.

[0020] 2. It is provided with a storage bag and a storage cross plate, which greatly increases the loading capacity of the folding trolley and does not affect the volume after its contraction and folding when it is folded up, facilitating storage and handling.

[0021] 3. Only by applying force to the left side frame and the right side frame, the folding chair can be folded and unfolded, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings further illustrate the present invention, but the content in the drawings does not constitute any limitation to the present invention.

[0023] Figure 1 It is a schematic structural diagram of one embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the contracted state of one embodiment of the present invention.

[0025] Figure 3 It is a partial enlarged view of one embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of the contracted state of another embodiment of the present invention, wherein the left side frame, right side frame, storage bag, left side rod, right side rod, storage cross plate, pull rod and wheels are removed.

[0027] In the drawings: upper cross bar 01, lower cross bar 02, limit connecting piece 011, left telescopic rod 03, first outer rod 31, first inner rod 32, second outer rod 33, right telescopic rod 04, third outer rod 41, second inner rod 42, fourth outer rod 43, left bottom frame 05, load-bearing cross plate 51, right bottom frame 06, wheels 07, left side frame 08, storage cross plate 81, fixed clamp 82, right side frame 09, fork rod assembly 10, pull rod 11, left side rod 12, right side rod 13, storage bag 14, fixed ear 141. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions of the present invention will be further described below in conjunction with the drawings and through specific embodiments. It should be noted that Figure 2 and Figure 4 the direction coordinates shown in, and the direction words such as up, down, left and right described in the present invention are only used to better explain the present invention, but not to limit the present invention.

[0029] Please refer to Figures 1-3, the present invention provides a folding trolley, comprising an upper crossbar 01, a lower crossbar 02, a left telescopic rod 03, a right telescopic rod 04, a left bottom frame 05, a right bottom frame 06, wheels 07, a left side frame 08, a right side frame 09, a left side rod 12 and a right side rod 13;

[0030] The left end of the upper crossbar 01 is hinged to the left side frame 08, the right end of the upper crossbar 01 is hinged to the right side frame 09, the left end of the lower crossbar 02 is hinged to the left bottom frame 05, the right end of the lower crossbar 02 is hinged to the right bottom frame 06. Limiting connecting pieces 011 are respectively arranged at the hinged positions at both ends of the upper crossbar 01 and both ends of the lower crossbar 02. The cross-section of the limiting connecting piece is a portal structure. The limiting connecting pieces 011 are respectively used to limit the unfolding angles of the upper crossbar 01, the left side frame 08 and the right side frame 09, and to limit the unfolding angles of the lower crossbar 02, the left bottom frame 05 and the right bottom frame 06;

[0031] The upper end of the left telescopic rod 03 is hinged to the left end of the upper crossbar 01, the lower end of the left telescopic rod 03 is hinged to the left end of the left bottom frame 05, the upper end of the right telescopic rod 04 is hinged to the right end of the upper crossbar 01, the lower end of the right telescopic rod 04 is hinged to the right end of the right bottom frame 06. There are at least three wheels 07, and the wheels 07 are respectively arranged on the bottom surfaces of the left bottom frame 05 and the right bottom frame 06;

[0032] The upper end of the left side rod 12 is hinged to the middle of the left side frame 08, the lower end of the left side rod 12 is hinged to the left end of the left bottom frame 05, the upper end of the right side rod 13 is hinged to the middle of the right side frame 09, and the lower end of the right side rod 13 is hinged to the right end of the right bottom frame 06.

[0033] When the folding trolley is unfolded, if the rotation angles of the left side frame 08, the left bottom frame 05, the right side frame 09 and the right bottom frame 06 are too large, it will cause the folding trolley to deform, affecting the use of the folding trolley and even easily damaging the folding trolley. Moreover, when carrying heavy items, the limiting connecting pieces 011 can limit the rotation of the left side frame 08, the left bottom frame 05, the right side frame 09 and the right bottom frame 06, achieving the effect of increasing the load-bearing capacity of the folding trolley.

[0034] By applying forces to the left frame 08, the right frame 09, and the lower crossbar 02, the left frame 08 and the right frame 09 are rotated, driving the rotation of the left bottom frame 05 and the right bottom frame 06, and causing changes in the lengths of the left telescopic rod 03 and the right telescopic rod 04, thereby realizing the contraction and expansion of the folding trolley. The rotations of the left frame 08 and the right frame 09 can be synchronized. During the rotations of the left frame 08 and the right frame 09, due to the changes in the lengths of the left telescopic rod 03 and the right telescopic rod 04, the position of the upper crossbar 01 also changes according to the lengths of the left telescopic rod 03 and the right telescopic rod 04.

[0035] As Figure 1 and Figure 2 shown, when the folding trolley is contracted to expanded, a horizontally upward force is applied to the left frame 08. The left frame 08 rotates with the hinge point between the left frame 08 and the upper crossbar 01 as the center of the circle, turning away from the lower crossbar 02 until the left frame 08 and the upper crossbar 01 are in the same horizontal plane. The limit connecting piece 011 limits the left frame 08, and self-locking is achieved through gravity and the limit connecting piece 011.

[0036] Driven by the left frame 08, the left side rod 12 rotates with the hinge point between the left side rod 12 and the left frame 08 as the center of the circle, turning towards the left telescopic rod 03. The left telescopic rod 03 slowly shrinks from the longest state to the shortest state. A horizontally downward force is applied to the lower crossbar 02, causing the left bottom frame 05 to rotate with the hinge point between the left bottom frame 05 and the lower crossbar 02 as the center of the circle, turning towards the upper crossbar 01 until the left bottom frame 05 and the lower crossbar 02 are in the same horizontal plane. The limit connecting piece 011 limits the left bottom frame 05, and self-locking is achieved through gravity and the limit connecting piece 011.

[0037] Similarly, a horizontally upward force is applied to the right frame 09. The right frame 09 rotates with the hinge point between the right frame 09 and the upper crossbar 01 as the center of the circle, turning away from the lower crossbar 02 until the right frame 09 and the upper crossbar 01 are in the same horizontal plane. The limit connecting piece 011 limits the right frame 09, and self-locking is achieved through gravity and the limit connecting piece 011.

[0038] Driven by the right frame 09, the right side rod 13 rotates with the hinge point between the right side rod 13 and the right frame 09 as the center of the circle, turning towards the right telescopic rod 04. The right telescopic rod 04 slowly shrinks from the longest state to the shortest state. A horizontally downward force is applied to the lower crossbar 02, causing the right bottom frame 06 to rotate with the hinge point between the right bottom frame 06 and the lower crossbar 02 as the center of the circle, turning towards the upper crossbar 01 until the right bottom frame 06 and the lower crossbar 02 are in the same horizontal plane. The limit connecting piece 011 limits the right bottom frame 06, and self-locking is achieved through gravity and the limit connecting piece 011.

[0039] After the folding trolley is fully unfolded, the "left frame 08 - upper crossbar 01 - right frame 09" forms the top surface of the folding trolley, the "left bottom frame 05 - lower crossbar 02 - right bottom frame 06" forms the bottom surface of the folding trolley, the wheels 07 are in contact with the ground, and the left side rod 12 and the right side rod 13 connect the top and bottom surfaces of the folding trolley.

[0040] When the folding trolley is being unfolded to being folded, by applying a horizontally downward force to the left frame 08 and the right frame 09 and a horizontally upward force to the lower crossbar 02, the folding work of the folding trolley can be carried out. During folding, the left telescopic rod 03 and the right telescopic rod 04 slowly retract from the shortest state to the longest state, the left bottom frame 05 and the right bottom frame 06 gradually rotate to below the lower crossbar 02, and the left side rod 12, the right side rod 13, the left frame 08 and the right frame 09 return to the state before unfolding.

[0041] Finally, the left side rod 12 is parallel to the left telescopic rod 03, the right side rod 13 is parallel to the right telescopic rod 04, the left frame 08 is close to the left side rod 12, the right frame 09 is close to the right side rod 13, and the structure of "left bottom frame 05 - lower crossbar 02 - right bottom frame 06" forms an inverted "U" shape, forming a storage space, and the wheels 07 rotate following the left bottom frame 05 or the right bottom frame 06 and enter the above-mentioned storage space.

[0042] Specifically, in the folding trolley of this embodiment, it further includes a fork rod assembly 10. The fork rod assembly 10 is in an "X" shape, and the left ends of the two sides of the fork rod assembly 10 are respectively hinged to the left end of the upper crossbar 01 and the left end of the lower crossbar 02. The right ends of the two sides of the fork rod assembly 10 are respectively hinged to the right end of the upper crossbar 01 and the right end of the lower crossbar 02.

[0043] The fork rod assembly 10 connects and fixes the upper crossbar 01 and the lower crossbar 02. Since the "X" - shaped fork rod assembly 10 forms two triangular structures with the upper crossbar 01 and the lower crossbar 02, the structure of the folding trolley is very stable, forming a frame structure of "upper crossbar 01 - fork rod assembly 10 - lower crossbar 02".

[0044] During the process of folding to unfolding, the rotation of the left frame 08 and the right frame 09 causes the left telescopic rod 03 and the right telescopic rod 04 to slowly retract from the longest state to the shortest state. When the position of the upper crossbar 01 gradually moves downwards, the fork rod assembly 10 makes the lower crossbar 02 move downwards synchronously with the upper crossbar 01. Similarly, during the process of unfolding to folding, the fork rod assembly 10 makes the upper crossbar 01 and the lower crossbar 02 move upwards synchronously.

[0045] By setting the fork rod assembly 10, during the unfolding or folding process of the folding trolley, the upper crossbar 01 and the lower crossbar 02 achieve synchronous displacement. As long as a force is applied to the left frame 08 and the right frame 09 to make the left frame 08 and the right frame 09 rotate, the overall folding and unfolding of the folding trolley can be achieved, and there is no need to apply an additional force to the lower crossbar 02, making the contraction and unfolding process faster and the folding trolley more convenient to use. At the same time, when in use, the fork rod assembly 10 can also serve as a guardrail for the folding trolley to prevent the items in the folding trolley from falling out due to bumps.

[0046] Please refer to Figure 1 and Figure 3 , specifically, a load-carrying cross plate 51 is fixedly connected to the left bottom frame 05 and the right bottom frame 06. The left bottom frame 05 and the right bottom frame 06 have the same structure, are symmetrically arranged at both ends of the lower crossbar 02, and are in a "U" shape. Load-carrying cross plates 51 are respectively provided on the left bottom frame 05 and the right bottom frame 06. Both ends of the load-carrying cross plate 51 are fixedly connected to the left bottom frame 05 or the right bottom frame 06, providing a platform for placing items and enabling the folding trolley to carry items in the unfolded state.

[0047] Preferably, the folding trolley further includes a storage bag 14. The storage bag 14 is made of canvas. When the folding trolley is unfolded, the storage bag 14 encloses a storage space inside the folding trolley. The storage bag 14 is respectively provided with a number of fixing ears 141 at positions close to the upper crossbar 01, the left frame 08, the right frame 09, the left side rod 12, and the right side rod 13. The upper crossbar 01, the left frame 08, the right frame 09, the left side rod 12, and the right side rod 13 respectively pass through the corresponding fixing ears 141, and the storage bag 14 can be firmly fixed to the folding trolley. The storage bag 14 can not only store small items in the folding trolley, but also does not affect the storage area and weight after the folding trolley is folded and contracted.

[0048] Specifically, a storage cross plate 81 is detachably connected to the left frame 08 and the right frame 09. A number of fixing clips 82 adapted to the left frame and the right frame are provided below the storage cross plate 81, and the fixing clips 82 are clamped on the left frame or the right frame.

[0049] As Figure 1 and Figure 3 shown, the storage cross plate 81 is made up of multiple cross plates spliced together. A number of fixing clips 82 adapted to the left frame and the right frame are provided below the storage cross plate 81, and the fixing clips 82 are clamped on the left frame or the right frame. The setting positions of the fixing clips 8 are as Figure 3 shown. Through the clamping of the fixing clips 82, the storage cross plate 81 is detachably connected to the left frame or the right frame.

[0050] The detachable connection allows the storage cross plate 81 to be installed at any position of the left frame 08 and the right frame 09, which can further enhance the storage capacity of the foldable trolley and improve the space utilization of the trolley without affecting its volume after shrinkage and folding. At the same time, when the storage cross plate 81 is installed on the foldable trolley, the storage cross plate 81 covers the opening of the foldable trolley. At this time, the foldable trolley can be used as an outdoor table, and outdoor activity items can be placed on the storage cross plate 81; in addition, the storage cross plate 81 can also be used as a cover plate of the foldable trolley to prevent items in the foldable trolley from falling out due to bumps.

[0051] Further, the right side frame 09 further comprises a pull rod 11, and the pull rod 11 is hinged to the right side of the right side frame 09. When in use, the pull rod 11 can more easily control the direction of the folding trolley, which is suitable for users of different heights and hand lengths.

[0052] Furthermore, the length of the left frame 08 is less than the maximum length of the left telescopic rod 03 , the length of the right frame 09 is less than the maximum length of the right telescopic rod 04 , and the sum of the lengths of the right frame 09 and the pull rod 11 is less than the maximum length of the right telescopic rod 04 .

[0053] When the folding trolley is in the unfolded state, the lengths of the left and right telescopic rods 04 are at their minimum. If the left frame 08 is longer than the maximum length of the left telescopic rod 03, and the right frame 09 is longer than the maximum length of the right telescopic rod 04, the proportions of the folding trolley will be uncoordinated. The left frame 08 and the right frame 09 are too large, which may easily lead to damage to the left frame 08 and the right frame 09, and it will be inconvenient to use.

[0054] In one embodiment, the sum of the lengths of the right frame 09 and the pull rod 11 is the same as the length of the left frame 08. Since the right side of the right frame 09 is hinged to the right pull rod 11, in order to prevent the pull rod 11 from being unable to be fully retracted when the folding trolley is in the retracted state and occupying more space, the sum of the lengths of the right frame 09 and the pull rod 11 is less than the maximum length of the right telescopic rod 04.

[0055] Specifically, the left telescopic rod 03 includes a first outer rod 31, a second outer rod 33 and a first inner rod 32. The lower end of the first outer rod 31 is hinged to the left end of the left bottom frame 05, one end of the first inner rod 32 is sleeved on the inner side of the first outer rod 31, and the other end is fixedly connected to the lower end of the second outer rod 33. The upper end of the second outer rod 33 is hinged to the left end of the upper cross bar 01.

[0056] like Figure 4As shown, since the first outer rod 31 is sleeved on the outside of the first inner rod 32, the length of the first outer rod 31 is greater than the length of the second outer rod 33, and the bottom areas of the first outer rod 31 and the second outer rod 33 are the same. The above two outer rods can play a role of limiting, preventing the folding bicycle from continuing to deform after being unfolded. At the same time, the pressure that the first outer rod 31 and the second outer rod 33 can withstand along their length direction is much greater than the pressure that the shaft can withstand, which can increase the carrying capacity of the folding bicycle.

[0057] Specifically, the right telescopic rod 04 includes a third outer rod 41, a fourth outer rod 43 and a second inner rod 42. The lower end of the third outer rod 41 is hinged to the right end of the right bottom frame 06, one end of the second inner rod 42 is sleeved on the inner side of the third outer rod 41, and the other end is fixedly connected to the lower end of the fourth outer rod 43. The upper end of the fourth outer rod 43 is hinged to the left end of the upper cross bar 01.

[0058] The left telescopic rod 03 and the right telescopic rod 04 have the same structure. Similarly, the left telescopic rod 03 and the right telescopic rod 04 have the same function and also play a limiting role to prevent the folding bicycle from continuing to deform after being unfolded. At the same time, the pressure that the third outer rod 41 and the fourth outer rod 43 can withstand when squeezed against each other along their length direction is much greater than the pressure that the rotating shaft can withstand, thereby increasing the carrying capacity of the folding bicycle.

[0059] Preferably, the wheel 07 is a universal wheel. The universal wheel makes it easier to control the direction of the foldable trolley when in use, which is more convenient.

[0060] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific embodiments of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A folding trolley, characterized in that: It includes an upper crossbar, a lower crossbar, a left telescopic rod, a right telescopic rod, a left bottom frame, a right bottom frame, wheels, a left side frame, a right side frame, a left side rod and a right side rod; The left end of the upper crossbar is hinged to the left side frame, the right end of the upper crossbar is hinged to the right side frame, the left end of the lower crossbar is hinged to the left bottom frame, the right end of the lower crossbar is hinged to the right bottom frame. Limited connection pieces are respectively arranged at the hinged positions of the left and right ends of the upper crossbar and the left and right ends of the lower crossbar. The cross-section of the limited connection piece is a portal structure. The limited connection pieces are respectively used to limit the unfolding angles of the upper crossbar, the left side frame and the right side frame, and limit the unfolding angles of the lower crossbar, the left bottom frame and the right bottom frame; The upper end of the left telescopic rod is hinged to the left end of the upper crossbar, the lower end of the left telescopic rod is hinged to the left end of the left bottom frame, the upper end of the right telescopic rod is hinged to the right end of the upper crossbar, the lower end of the right telescopic rod is hinged to the right end of the right bottom frame. There are at least three wheels, and the wheels are respectively arranged on the bottom surfaces of the left bottom frame and the right bottom frame; The upper end of the left side rod is hinged to the middle of the left side frame, the lower end of the left side rod is hinged to the left end of the left bottom frame, the upper end of the right side rod is hinged to the middle of the right side frame, and the lower end of the right side rod is hinged to the right end of the right bottom frame; It further includes a fork rod assembly. The fork rod assembly is in an "X" shape, and the left and right ends of the left side of the fork rod assembly are respectively hinged to the left end of the upper crossbar and the left end of the lower crossbar, and the left and right ends of the right side of the fork rod assembly are respectively hinged to the right end of the upper crossbar and the right end of the lower crossbar.

2. The folding trolley according to claim 1, characterized in that: A load-carrying cross plate is fixedly connected to the left bottom frame and the right bottom frame.

3. The folding trolley according to claim 1, characterized in that: It further includes a storage bag. The storage bag is made of canvas. When the folding trolley is unfolded, the storage bag encloses a storage space inside the folding trolley. Fixed ears are arranged at positions close to the upper crossbar, the left side frame, the right side frame, the left side rod and the right side rod. The upper crossbar, the left side frame, the right side frame, the left side rod and the right side rod respectively pass through the corresponding fixed ears to fix the storage bag on the folding trolley.

4. The folding trolley according to claim 1, characterized in that: Removably connected to the left side frame and the right side frame are storage cross plates. A plurality of fixing clips adapted to the left side frame and the right side frame are arranged below the storage cross plates, and the fixing clips are clamped on the left side frame or the right side frame.

5. The folding trolley according to claim 1, characterized in that: The right side frame further includes a pull rod, and the pull rod is hinged to the right side surface of the right side frame.

6. The folding trolley according to claim 5, characterized in that: The length of the left side frame is less than the maximum length of the left telescopic rod, the length of the right side frame is less than the maximum length of the right telescopic rod, and the sum of the length of the right side frame and the pull rod is less than the maximum length of the right telescopic rod.

7. The folding trolley according to claim 1, characterized in that: The left telescopic rod includes a first outer rod, a second outer rod and a first inner rod. The lower end of the first outer rod is hinged to the left end of the left bottom frame. One end of the first inner rod is sleeved inside the first outer rod, and the other end is fixedly connected to the lower end of the second outer rod. The upper end of the second outer rod is hinged to the left end of the upper crossbar.

8. The folding trolley according to claim 1, characterized in that: The right telescopic rod includes a third outer rod, a fourth outer rod, and a second inner rod. The lower end of the third outer rod is hinged to the right end of the right bottom frame. One end of the second inner rod is sleeved inside the third outer rod, and the other end is fixedly connected to the lower end of the fourth outer rod. The upper end of the fourth outer rod is hinged to the left end of the upper cross bar.

9. The folding trolley according to claim 1, characterized in that: The wheel is a universal wheel.

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