Multifunctional freight trolley

Abstract

A multifunctional freight trolley comprises a main trolley frame and an auxiliary trolley frame which are arranged in the front-back direction and hinged to each other, each trolley frame comprises two rolling wheels, the two trolley frames have an unfolded state and a folded state, in the unfolded state, the two trolley frames are oppositely unfolded, and at least one unfolding angle alpha can be formed between the two trolley frames; in the folding state, the auxiliary frame is attached to the main frame; wherein in the unfolded state, the rollers of the two frames are both in the working state, and in the folded state, only the rollers of the main frame are in the working state; the cart further comprises a locking device used for locking the state of the cart. According to the scheme, the cart has the folded state and the unfolded state, in the unfolded state, the four idler wheels of the two cart frames are all in the working state, the weight of goods is completely transmitted to the front idler wheel and the rear idler wheel of the cart, and compared with the prior art, the situation that a user bears the weight of the goods is avoided, and the load of the user is greatly relieved; and more labor is saved in the cargo carrying process.

Description

Technical Field

[0001] The invention relates to the technical field of cargo handling, and in particular to a multifunctional cargo trolley. Background Art

[0002] As a convenient and labor-saving cargo handling tool, trolleys are widely used in supermarkets, construction sites, factories, stations, airports and other occasions, which can effectively reduce the workload of porters.

[0003] Existing trolleys usually only include a frame and two rollers arranged under the frame. When in use, the frame is tilted, and the weight of the frame and the goods is transferred to the user in front and the wheels at the rear. The tilt angle of the frame during use needs to be determined according to the weight of the goods, the height of the user and the weight that the user can bear. When carrying heavy goods, the user will bear a greater labor load. The carrying distance is short and the user can bear it. If the carrying distance is long, the carrying process will be very laborious and painful.

[0004] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a subject to be studied and solved by the present invention. Summary of the invention

[0005] The object of the present invention is to provide a multifunctional cargo trolley.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a multifunctional cargo trolley, comprising a main frame and a sub-frame arranged and hinged in the front-back direction, both frames comprising two rollers, and the two frames have an unfolded state and a closed state, in the unfolded state, the two frames are relatively unfolded, and at least one unfolding angle α can be formed between the two frames; in the closed state, the sub-frame is attached to the main frame; wherein, in the unfolded state, the rollers of the two frames are in a working state, and in the closed state, only the rollers of the main frame are in a working state; The cart also includes a locking device for locking the cart state, the locking device is arranged corresponding to the hinge of the main frame and the auxiliary frame, and includes a first elastic locking piece, and the main frame is provided with an expansion positioning groove and a closing positioning groove corresponding to the first elastic locking piece; wherein, at least one expansion positioning groove is provided, each expansion positioning groove corresponds to each expansion angle α between the two frames, and the closing positioning groove corresponds to the closed state of the two frames.

[0007] In the above scheme, at least one unfolding angle can be formed between the two frames. When the four rollers are in use, different unfolding angles can be formed between the two frames, that is, a plurality of different angles can be formed between the load surface of the main frame and the ground. When transporting items that need to be upright, such as oxygen cylinders, an angle approximately vertical is formed between the load surface and the ground. When transporting a large number of miscellaneous and small goods, the load surface can be adjusted to be parallel to the ground, that is, a state similar to a flatbed truck. In addition, the load surface can also be adjusted to form other angles with the ground according to other special needs, as long as the corresponding unfolding positioning grooves are opened on the main frame in advance, and the effect of one vehicle with multiple uses can be achieved through easy adjustment.

[0008] In the above scheme, the specific presentation state of the cart can be adjusted according to the specific situation of the goods. If the distance is short and the goods are light, the goods can be easily transported in the folded state of the main and auxiliary frames; if the distance is far and the goods are heavy, the main and auxiliary frames can be unfolded. In the unfolded state, the front and rear four rollers of the cart are all in working state, and the weight of the goods is fully transferred to the front and rear four rollers of the cart. Compared with the existing technology, it avoids the user from bearing the weight of the goods, greatly reduces the user's load, and makes the cargo handling process more labor-saving.

[0009] According to a further technical solution, the unfolding angle α is 30°≤α≤120°.

[0010] A further technical solution is that the first elastic locking member includes an unlocking rod, a first elastic member and a lock seat, wherein the unlocking rod is limited in the lock seat, and the lock seat is relatively fixed relative to the sub-frame; one end of the first elastic member is positioned against the unlocking rod, and the other end of the first elastic member is positioned against the lock seat, so that the unlocking rod maintains a movement tendency to be stuck forward into the positioning groove, thereby achieving the locking of the cart state.

[0011] A further technical solution is that the cart also includes a pair of connecting plates, which are respectively arranged on the left and right main pillars of the main frame, and the two connecting plates are symmetrically arranged on the left and right; the connecting plates are fixedly connected to the main pillars and hinged to the sub-pillars of the sub-frame, thereby constituting a hinge between the main and sub-frames; the connecting plates are provided with the expansion positioning groove and the closing positioning groove on the outer edge near the sub-frame; the unlocking rod has a length in the left and right directions, and when locked, the left and right ends of the unlocking rod are both inserted forward into any pair of positioning grooves, constituting a lock of the corresponding state of the cart.

[0012] A further technical solution is that the first elastic member and the lock seat are provided with a pair, and the two first elastic members and the two lock seats are respectively provided corresponding to the left and right vehicle columns, wherein the two lock seats are provided with a strip hole for the unlocking rod to pass through in the front-to-back direction, when locking, the unlocking rod moves forward along the strip hole and snaps into the positioning groove, and when unlocking, the unlocking rod is pulled backward to disengage from the positioning groove. The first elastic member and the lock seat are provided with a pair, and the two first elastic members and the two lock seats are respectively provided corresponding to the left and right vehicle columns, so that the two ends of the unlocking rod have the same structure, and the movement of the two ends is also consistent, and they are synchronously snapped into the positioning groove or synchronously disengaged from the positioning groove; the provision of the strip hole, on the one hand, enables the unlocking rod to move along the strip hole without displacement error, and realizes the alignment with the positioning groove, and on the other hand, the front-to-back displacement of the unlocking rod has a limit, and will not exceed the action range of the first elastic member. The specific locking and unlocking process is: when unlocking, the unlocking rod is pulled backwards to overcome the elastic force of the first elastic member, so that the unlocking rod is separated from the positioning groove in this state, and then the sub-frame is rotated to the next position state, and the unlocking rod is released, so that the unlocking rod is moved forward and simultaneously inserted into the positioning groove in the corresponding state under the action of the first elastic member, thereby realizing the locking of the main and sub-frames in this position state, which is simple to operate and has a reliable locking.

[0013] In a further technical solution, the cart further comprises an adjusting device for adjusting the height of the hinge point of the main and auxiliary frames relative to the position on the auxiliary frame, and the adjusting device is arranged corresponding to the hinge of the main and auxiliary frames. When the main and auxiliary frames are unfolded at a certain angle, the angle between the load surface of the main frame and the ground can be adjusted by adjusting the height of the hinge point, so that the angle between the load surface and the ground can present more situations, making the adjustment of the cart more flexible and changeable, and suitable for more occasions of use.

[0014] According to a further technical solution, the adjustment device comprises a fixing seat, the front part of which is hinged to the main column, and the rear part of which is slidably connected to the auxiliary column; the fixing seat is provided with a positioning hole, and the auxiliary column is provided with a plurality of locking holes arranged along its length direction, and each locking hole is provided corresponding to the positioning hole; The adjusting device further comprises a second elastic locking member. In a locked state, the second elastic locking member extends into any locking hole on the auxiliary vehicle column via a positioning hole on the fixing seat.

[0015] According to a further technical solution, the second elastic locking member includes a locking pin and a second elastic member, one end of the second elastic member is positioned against the locking pin, and the other end is positioned against the fixing seat, so that the head of the locking pin maintains a movement tendency to be inserted inwardly into the positioning hole and the locking hole. The middle part of the locking pin is an operating part. When unlocking, the operating part is pulled outwardly to overcome the elastic force of the second elastic member, so that the locking pin moves outward, and the head of the locking pin at least detaches from the locking hole, thereby unlocking the auxiliary vehicle column. Then, the auxiliary vehicle column is adjusted upward or downward to a required height, and the operating part is released, so that the locking pin, under the action of the second elastic member, the head of the locking pin is inserted inwardly into the positioning hole and the locking hole, thereby locking the height of the auxiliary vehicle column.

[0016] According to a further technical solution, a pair of the adjusting devices are provided, and the two adjusting devices are respectively arranged on the left and right sides of the cart.

[0017] According to a further technical solution, the rear portion of the fixing seat has a vertically penetrating passage, and the auxiliary vehicle column slides through the passage; the front portion of the lock seat is fixedly connected to the rear portion of the fixing seat.

[0018] According to a further technical solution, the first elastic member is a compression spring, a tension spring or a spring sheet; and the second elastic member is a compression spring, a tension spring or a spring sheet.

[0019] In the above scheme, the positioning groove is a general term for the expanded positioning groove and the closed positioning groove.

[0020] The working principle and advantages of the present invention are as follows: 1. The cart in this case has a folded state and an unfolded state. In the unfolded state, the four rollers of the two frames are in working condition, and the weight of the goods is completely transferred to the front and rear four rollers of the cart. Compared with the existing technology, it avoids the user from bearing the weight of the goods, greatly reduces the user's load, and makes the cargo handling process more labor-saving.

[0021] 2. The main and auxiliary frames can form at least one unfolding angle. Different unfolding angles can form different angles between the loading surface of the main frame and the ground. Different angles have different usage scenarios. When transporting items that need to be upright, such as oxygen cylinders, the loading surface can be adjusted to an angle that is approximately perpendicular to the ground; when transporting more, more miscellaneous, and smaller goods, the loading surface can be adjusted to be approximately parallel to the ground, that is, a state similar to a flatbed truck; in addition, the loading surface can be adjusted to form other angles with the ground according to other special needs, as long as the corresponding unfolding positioning grooves are opened on the main frame in advance, and the effect of one vehicle with multiple uses can be achieved through easy adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 This is a schematic structural diagram of the main and auxiliary vehicle pillars of the trolley in the folded state according to an embodiment of the present invention; Attached Figure 2 For attachment Figure 1 Enlarged view of point A in the middle; Attached Figure 3 This is a schematic diagram of the structure of the cart in a folded state from a side view of an embodiment of the present invention; Attached Figure 4 For attachment Figure 3 Enlarged view of point B in the middle; Attached Figure 5 The structure of the cart in the unfolded state according to the embodiment of the present invention is shown in FIG. Figure 1 ; Attached Figure 6 The structure of the cart in the unfolded state according to the embodiment of the present invention is shown in FIG. Figure 2 ; Attached Figure 7 This is a schematic diagram of the structure of the cart in a folded state from a rear side perspective of an embodiment of the present invention; Attached Figure 8 For attachment Figure 7 Enlarged view of point C in the middle; Attached Fig. 9 It is a structural exploded view of a sub-frame and related components combined on the sub-frame in a cart according to an embodiment of the present invention; Attached Fig.10 It is a structural exploded view of a main frame and related components combined on the main frame in a cart according to an embodiment of the present invention.

[0023] In the above drawings: 1. Main frame; 1a. Main column; 2. Sub-frame; 2a. Sub-column; 3. Roller; 4. Expanding positioning groove; 6. Closing positioning groove; 7. Unlocking lever; 8. First elastic member; 9. Locking seat; 10. Connecting piece; 11. Strip hole; 12. Fixing seat; 13. Positioning hole; 14. Locking hole; 15. Locking pin; 16. Second elastic member. Implementation

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0025] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0026] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0027] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0028] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0029] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0030] The terms "front", "back", "left", "right", etc. used in this article are directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0031] See attached Figure 1-10 As shown, a multifunctional cargo trolley comprises a main frame 1 and a sub-frame 2 arranged in the front-to-back direction and articulated, both frames comprise two rollers 3, and the two frames have an unfolded state and a folded state. In the unfolded state, the two frames are relatively unfolded, and at least one unfolding angle α can be formed between the two frames, 30°≤α≤120°, Figure 5 and Figure 6 Two unfolding angles of the stroller are shown respectively. In the folded state, the auxiliary frame 2 is attached to the main frame 1, that is, the angle between the two frames is 0°; wherein, in the unfolded state, the rollers 3 of the two frames are in working state, and in the folded state, only the rollers 3 of the main frame 1 are in working state.

[0032] The main frame 1 and the sub-frame 2 are hinged by a pair of connecting plates 10. The two connecting plates 10 are respectively arranged on the left and right main pillars 1a of the main frame 1, and the two connecting plates 10 are symmetrically arranged on the left and right sides; the connecting plate 10 is fixedly connected to the main pillar 1a and hinged to the sub-pillar 2a of the sub-frame 2, thereby forming a hinge between the main and sub-frames 2; the connecting plate 10 is fan-shaped, and the connecting plate 10 is provided with an expansion positioning groove 4 and a closing positioning groove 6 near the outer edge of the sub-frame 2, wherein the expansion positioning groove 4 is provided with at least one, and each expansion positioning groove 4 corresponds to each expansion angle α of the two frames in the expanded state, and the closing positioning groove 6 corresponds to the closed state of the two frames. Figure 5 and Figure 6The two unfolding angles of the cart are shown to be 53° and 90° respectively. When the angle between the main frame and the auxiliary frame is 90°, the height of the hinge point can be adjusted to the flatbed state more quickly. In the flatbed state, the cart can carry heavier goods, and the carrying process is more stable. During the adjustment process, the loading surface of the main frame 1 is adjusted from the intersecting state to the horizontal state with the ground, that is, the loading surface of the main frame is adjusted from the inclined state to the horizontal state.

[0033] The cart also includes a locking device for locking the cart state, which is arranged corresponding to the hinge of the main frame and the auxiliary frame, and includes a first elastic locking piece, which is arranged corresponding to each expansion positioning groove 4 and the closing positioning groove 6. When the first elastic locking piece is snapped into the expansion positioning groove 4, the corresponding expansion state of the cart is locked, and when the first elastic locking piece is snapped into the closing positioning groove 6, the closing state of the cart is locked.

[0034] The first elastic locking member includes an unlocking rod 7, a first elastic member 8 and a lock seat 9, wherein the unlocking rod 7 is limited in the lock seat 9, and the lock seat 9 is relatively fixed relative to the sub-frame 2; one end of the first elastic member 8 is positioned against the unlocking rod 7, and the other end of the first elastic member 8 is positioned against the lock seat 9, so that the unlocking rod 7 maintains a movement tendency to be inserted into the positioning groove forward. Specifically, the unlocking rod 7 has a length in the left and right directions. When locked, the left and right ends of the unlocking rod 7 are inserted forward into any pair of positioning grooves (the positioning grooves are collectively referred to as the unfolded positioning grooves 4 and the closed positioning grooves 6) of the left and right connecting plates 10, thereby locking the corresponding state of the cart. The first elastic member 8 and the lock seat 9 are provided in pairs, and the two first elastic members 8 and the two lock seats 9 are respectively provided corresponding to the left and right auxiliary vehicle pillars 2a, wherein the two lock seats 9 are provided with a strip hole 11 for the unlocking rod 7 to pass through along the front-to-back direction, when locking, the unlocking rod 7 moves forward along the strip hole 11 and is stuck in the positioning groove, and when unlocking, the unlocking rod 7 is pulled backward to be out of the positioning groove. The first elastic member 8 is one of a compression spring, a tension spring or a spring sheet, and in this case, it is a spring sheet.

[0035] The cart also includes an adjustment device for adjusting the height of the hinge point of the main and auxiliary frames relative to the position on the auxiliary frame, and the adjustment device is arranged corresponding to the hinge of the main and auxiliary frames. The adjustment device is provided in a pair, and the two adjustment devices are respectively arranged on the left and right sides of the cart. Specifically, the adjustment device includes a fixed seat 12, the front part of which is hinged to the main column 1a, and the rear part of the fixed seat 12 is fixed to the front part of the lock seat 9 by welding; the rear part of the fixed seat 12 has a vertically through-going passage, and the auxiliary column 2a slides through the passage; the fixed seat 12 is provided with a positioning hole 13, and the auxiliary column 2a is provided with a plurality of locking holes 14 arranged along the length direction of the auxiliary column 2a, and each locking hole 14 is arranged corresponding to the positioning hole 13; the adjustment device also includes a second elastic locking member, and in the locked state, the second elastic locking member extends into any locking hole 14 on the auxiliary column 2a through the positioning hole 13 on the fixed seat 12. The second elastic locking member includes a locking pin 15 and a second elastic member 16, one end of the second elastic member 16 is positioned against the locking pin 15, and the other end is positioned against the fixing seat 12, so that the head of the locking pin 15 maintains a movement tendency to be inserted inwardly into the positioning hole 13 and the locking hole 14. When unlocking, the locking pin 15 is pulled outward to make the head of the locking pin at least separate from the locking hole 14. The second elastic member 16 is one of a compression spring, a tension spring or a spring sheet, and the second elastic member 16 in this case is a compression spring.

[0036] According to the above structural composition, the specific working principle of the present invention is described as follows: Adjust the state of the cart: first pull the unlocking lever 7 backwards, so that the unlocking lever 7 overcomes the force of the first elastic member 8 and moves backwards and leaves the positioning groove in this state, then rotate the subframe 2 to the second position state, release the unlocking lever 7, so that the unlocking lever 7 is forwardly stuck into the positioning groove in the second position state under the action of the first elastic member 8, and the second position state of the cart is locked. Compared with the prior art, the cart in this case has multiple use states, including a folded state in which two wheels are working and an unfolded state in which all four wheels are in working state. In the unfolded state, all four wheels of the cart are in working state, and the four wheels fully bear the weight of the goods, which greatly reduces the load of the user and makes the transportation process easier and more convenient; in addition, in the unfolded state, the cart can be provided with multiple unfolding angles, and different unfolding angles can be adapted to carry goods with different requirements, so as to realize multiple uses of one cart.

[0037] Adjust the position height of the hinge point of the main and auxiliary frames: pull the locking pin 15 outward to overcome the elastic force of the second elastic member 16, so that the head of the locking pin 15 at least disengages from the locking hole 14 on the auxiliary column 2a, then pull the fixing seat 12 upward or slide it downward to the required height, and align the positioning hole 13 with the locking hole 14 at the height, release the locking pin 15, and the locking pin 15 is inserted into the positioning hole 13 and the locking hole 14 inward under the action of the second elastic member 16. When the angle between the main and auxiliary frames is constant, the angle between the loading surface of the main frame 1 and the ground can be adjusted by adjusting the position height of the hinge point, thereby realizing the transportation of goods with different requirements and realizing multiple uses of one vehicle.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional cargo trolley, characterized in that: The vehicle comprises a main frame (1) and a sub-frame (2) which are arranged in a front-to-rear direction and are hingedly connected, the two frames each comprising two rollers (3), and the two frames have an unfolded state and a closed state. In the unfolded state, the two frames are relatively unfolded, and at least one unfolding angle α can be formed between the two frames; in the closed state, the sub-frame (2) is attached to the main frame (1); wherein, in the unfolded state, the rollers (3) of the two frames are both in a working state, and in the closed state, only the rollers (3) of the main frame (1) are in a working state; The cart further comprises a locking device for locking the cart state, the locking device being arranged at a hinged position corresponding to the main frame and the auxiliary frame, comprising a first elastic locking member, and corresponding to the first elastic locking member, an unfolding positioning groove (4) and a closing positioning groove (6) are provided on the main frame (1); wherein at least one unfolding positioning groove (4) is provided, and each unfolding positioning groove (4) is arranged corresponding to each unfolding angle α between the two frames, and the closing positioning groove (6) corresponds to the closed state of the two frames.

2. The multifunctional cargo trolley according to claim 1, characterized in that: The unfolding angle α is 30°≤α≤120°.

3. The multifunctional cargo trolley according to claim 1, characterized in that: The first elastic locking member comprises an unlocking rod (7), a first elastic member (8) and a lock seat (9), wherein the unlocking rod (7) is limited in the lock seat (9), and the lock seat (9) is relatively fixed relative to the auxiliary frame (2); One end of the first elastic member (8) is positioned against the unlocking rod (7), and the other end of the first elastic member (8) is positioned against the lock seat (9), so that the unlocking rod (7) maintains a movement tendency to be locked forward into the positioning groove.

4. The multifunctional cargo trolley according to claim 3, characterized in that: The cart further comprises a pair of connecting plates (10), the two connecting plates (10) being respectively arranged on the left and right main vehicle pillars (1a) of the main vehicle frame (1), and the two connecting plates (10) being arranged symmetrically on the left and right sides; The connecting piece (10) is fixedly connected to the main column (1a) and is hinged to the auxiliary column (2a) of the auxiliary frame (2), thereby forming a hinged connection between the main and auxiliary frames (2); the connecting piece (10) is provided with the unfolding positioning groove (4) and the closing positioning groove (6) at the outer edge close to the auxiliary frame (2); The unlocking rod (7) has a length in the left-right direction. When locked, the left and right ends of the unlocking rod (7) are inserted forward into any pair of positioning grooves, thereby locking the corresponding state of the cart.

5. The multifunctional cargo trolley according to claim 4, characterized in that: The first elastic member (8) and the lock seat (9) are each provided in pair, and the two first elastic members (8) and the two lock seats (9) are respectively provided corresponding to the left and right vehicle columns (2a), wherein the two lock seats (9) are each provided with a strip hole (11) in the front-to-back direction for the unlocking rod (7) to pass through; when locking, the unlocking rod (7) moves forward along the strip hole (11) and is inserted into the positioning groove; when unlocking, the unlocking rod (7) is pulled backward to be separated from the positioning groove.

6. The multifunctional cargo trolley according to any one of claims 1 to 5, characterized in that: The cart also includes an adjusting device for adjusting the height of the hinge point of the main and auxiliary frames relative to the position on the auxiliary frame, and the adjusting device is arranged corresponding to the hinge of the main and auxiliary frames.

7. The multifunctional cargo trolley according to claim 6, characterized in that: The adjustment device comprises a fixing seat (12), the front part of which is hinged to the main vehicle column (1a), and the rear part of which is slidably connected to the auxiliary vehicle column (2a); the fixing seat (12) is provided with a positioning hole (13), and the auxiliary vehicle column (2a) is provided with a plurality of locking holes (14) arranged along its length direction, and each locking hole (14) is provided corresponding to the positioning hole (13); The adjustment device also includes a second elastic locking piece. In a locked state, the second elastic locking piece extends into any locking hole (14) on the auxiliary vehicle column (2a) via a positioning hole (13) on the fixing seat (12).

8. The multifunctional cargo trolley according to claim 7, characterized in that: The second elastic locking member comprises a locking pin (15) and a second elastic member (16), one end of the second elastic member (16) being positioned against the locking pin (15) and the other end of the second elastic member (16) being positioned against the fixing seat (12), so that the head of the locking pin (15) maintains a movement tendency to be inserted inwardly into the positioning hole (13) and the locking hole (14).

9. The multifunctional cargo trolley according to claim 6, characterized in that: A pair of adjusting devices are provided, and the two adjusting devices are respectively arranged on the left and right sides of the cart.

10. The multifunctional cargo trolley according to claim 7, characterized in that: The rear portion of the fixing seat (12) has a vertically penetrating passage, and the auxiliary vehicle column (2a) slides through the passage; The front portion of the lock seat (9) is fixedly connected to the rear portion of the fixing seat (12).

11. The multifunctional cargo trolley according to claim 8, characterized in that: The first elastic member (8) is one of a compression spring, a tension spring or a spring sheet; the second elastic member (16) is one of a compression spring, a tension spring or a spring sheet.

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