CN108099981A - A kind of multifunctional trolley - Google Patents

Abstract

The invention discloses a multifunctional trolley, which belongs to the field of transport tools. The trolley of the present invention comprises an upper platform, a bottom platform and a push handle, the push handle is fixed on the rear of the bottom platform, and the upper platform is installed on the vertical arm of the push handle through a vertical lifting mechanism; the bottom platform includes a bottom platform fixed frame and a bottom platform telescopic frame , the bottom platform fixed frame and the bottom platform telescopic frame are telescopically matched, and the front part of the bottom platform telescopic frame is provided with a front wheel, the rear part of the bottom platform fixed frame is provided with a rear wheel, and there is a gap between the bottom platform fixed frame and the bottom platform telescopic frame An elastic mechanism is provided, and a linkage mechanism that drives the telescopic frame of the bottom platform to retract as the upper platform rises is also provided between the upper platform and the bottom platform telescopic frame. The invention improves the loading capacity of the trolley, makes the trolley have multiple functions, the upper platform and the lower platform are organically combined through a linkage mechanism, the functions are coordinated, the use is more flexible, the operation is simpler, and the work efficiency is improved.

Description

A kind of multifunctional trolley

technical field

The present invention relates to a trolley, and more particularly to a multifunctional trolley.

Background technique

Now, many single-function product designs on the market can no longer meet people's growing living needs. Many products have single functions and no innovation. These products will only make people feel that they are a waste of resources, occupying space, and wasting money. Bring various inconveniences to people's life and work. Multi-functional design is to add some practical functions on the basis of single-function products. However, in the current market, there are many multi-functional products that have no actual practical value. They are designed and produced entirely for functions, and some multi-functional Products have no connection between their functions at all, resulting in a waste of functions.

The handcart is a transport vehicle that is pushed and pulled by manpower, and it has been used as an indispensable transport tool to this day. The traditional trolley has a single function, a small loading area, and not many things. With the continuous development of trolley material handling technology, trolleys are also developing in the direction of multi-function. For example, the Chinese patent number ZL201520317428.9, the authorized announcement date is September 30, 2015, and the name of the invention is: a multi-functional folding luggage cart. This application relates to a multi-functional folding luggage cart, which includes a telescopic frame , vertical brackets, front brackets, middle brackets, rear brackets, positioning rods, seat panels, wheels, one end of the telescopic bracket is inserted into the support rods on both sides of the vertical bracket, and can slide along the support rods. The frame is hinged with one end of the front bracket through the L-shaped connecting plate welded on both sides of the support rod. The front bracket and the rear bracket have the same structure and are symmetrically hinged at both ends of the middle bracket. The wheels are connected to the front bracket through the triangular support plate and the wheel axle. Connect to the rear bracket. The luggage trolley in this application has certain adaptability to the goods it carries, and can be transformed into a trolley or trolley according to the size, shape or weight of the goods it carries, and it can also be transformed into a seat for people in the middle of towing the goods. It is used for sitting and resting, and has various functions. However, the luggage trolley of this application still adopts the structure of the traditional trolley, and its loading capacity is limited. The deformation between the trolley, the trolley and the seat is only realized by folding, and in a certain state it can only be realized. A specific function, each function can not be connected, inconvenient to use, difficult to operate.

Contents of the invention

1. The technical problem to be solved by the invention

The purpose of the present invention is to overcome the shortcomings of existing trolleys such as single function and poor loading capacity, and provide a multi-functional trolley. By adopting the technical solution of the present invention, the trolley has two upper and lower platforms, and the upper platform can move up and down, and the bottom platform has The telescopic frame of the bottom platform can be stretched. The lifting movement of the upper platform and the telescopic frame of the bottom platform have a linkage mechanism. While the upper platform can be loaded with goods, it can also be used as a seat, which is convenient for rest during the transportation of goods, and not only improves the loading of the trolley capacity, and make the trolley have multiple functions, the upper platform and the bottom platform are organically combined through the linkage mechanism, which is more flexible to use and easier to operate; at the same time, the upper platform also has a telescopic frame, which further improves the loading capacity of the trolley, and the upper platform It can be flipped and folded, which is very convenient to use; in addition, when the upper platform is used as a seat, it also has a folding table, which is fully functional and can be used in various occasions, providing great convenience to people.

2. Technical solution

In order to achieve the above object, the technical scheme provided by the invention is:

A kind of multifunctional trolley according to the present invention comprises an upper platform, a bottom platform and a push handle, the push handle is fixed on the rear of the bottom platform, the upper platform is installed on the vertical arm of the push handle through a vertical lifting mechanism, and the upper The platform is located directly above the bottom platform; the bottom platform includes a bottom platform fixed frame and a bottom platform telescopic frame, and the bottom platform fixed frame and the bottom platform telescopic frame are telescopically matched, and the front part of the bottom platform telescopic frame is provided with a front wheels, the rear part of the bottom platform fixed frame is provided with a rear wheel, and an elastic mechanism for keeping the bottom platform telescopic frame elastically stretched out is also provided between the bottom platform fixed frame and the bottom platform telescopic frame, and the described upper platform and the bottom platform telescopic frame are provided with elastic mechanisms. The telescopic frame of the bottom platform is also provided with a linkage mechanism that drives the retraction of the telescopic frame of the bottom platform as the upper platform rises.

Furthermore, the linkage mechanism includes a block of pulleys and a traction rope, the block of pulleys is installed between the upper platform and the fixed frame of the bottom platform, one end of the traction rope is connected to the telescopic frame of the bottom platform, and the other end goes around The pulley block is connected on the upper platform or the bottom platform fixed frame behind, and the rise of the upper platform drives the length of the traction rope between the upper platform and the bottom platform fixed frame to increase and pulls the bottom platform telescopic frame to retract.

Further, the linkage mechanism is provided with two groups on both sides of the trolley, and the pulley blocks of each linkage mechanism include a first pulley, a second pulley, a third pulley and a fourth pulley, and the first pulley and The third pulley is installed on the upper platform, the second pulley and the fourth pulley are installed on the fixed frame of the bottom platform, one end of the traction rope is connected to the fixed frame of the bottom platform, and the other end goes around the first pulley in turn , the second pulley and the third pulley are connected with the telescopic frame of the bottom platform after being steered by the fourth pulley.

Furthermore, the vertical lifting mechanism includes a guide rail, an upper platform lifting slide, a slider and a lifting drive mechanism, the guide rail is vertically installed on the vertical arms on both sides of the push handle, and the upper platform lifting slide The seat is installed on the guide rail through the slide block, the lifting drive mechanism is installed between the bottom platform fixing frame and the upper platform lifting slide, and the upper platform is installed on the upper platform lifting slide.

Furthermore, the lifting drive mechanism is a pedal lifting hydraulic pump.

Furthermore, the upper platform and the upper platform lifting slide are connected by turning hinges, and the upper platform can be turned upside down and folded on the upper part of the push handle.

Further, the bottom of the upper platform is also equipped with telescopic support legs, and the telescopic support legs are connected to the upper platform in rotation; the telescopic support legs include a support frame and a support that is slidably installed on the bottom of the support frame The inner frame, a locking mechanism is also provided between the support outer frame and the support inner frame.

Furthermore, the upper platform includes an upper platform fixed frame and an upper platform telescopic frame, and the upper platform telescopic frame is installed on the upper platform fixed frame through slide rails.

Furthermore, the two sides of the upper platform are provided with handrails, and the handrails on one side are also provided with table board fixing rods and table boards, and the table board fixing rods can be turned forward and installed on the handrails , the table board is rotatably mounted on the table board fixing rod.

Furthermore, the elastic mechanism is a controllable gas spring.

3. Beneficial effects

Compared with the existing known technology, the technical solution provided by the invention has the following remarkable effects:

(1) A kind of multifunctional trolley of the present invention, its trolley has upper and lower platforms, and the upper platform can lift and move, and the bottom platform has the bottom telescopic frame that can stretch, and the lifting movement of the upper platform and the bottom platform telescopic frame have linkage mechanism , while the upper platform can be loaded with goods, it can also be used as a seat, which is convenient for rest during the delivery of goods. It not only improves the loading capacity of the trolley, but also makes the trolley have multiple functions. The upper platform and the bottom platform are organically combined through a linkage mechanism , functional coordination, more flexible use, simpler operation, improved work efficiency, and saved a lot of working time;

(2) A kind of multifunctional trolley of the present invention, its linkage mechanism comprises pulley block and traction rope, and the rise of the upper platform drives the length of the traction rope between the upper platform and the bottom platform fixed frame to increase and pulls the retractable frame of the bottom platform. The structure of the mechanism is simple, easy to set up, low in cost, and stable and reliable; and the linkage mechanism is provided with two groups on both sides of the trolley, and the pulley blocks of each linkage mechanism include a first pulley, a second pulley, a third pulley and The fourth pulley increases the number of winding times of the traction rope between the upper platform and the bottom platform fixed frame, so that the lifting stroke of the upper platform and the telescopic stroke of the bottom platform telescopic frame are in multiples, satisfying the lifting height of the upper platform and the bottom platform. The telescopic length relationship of the telescopic frame is reasonable and ingenious in design;

(3) A kind of multifunctional trolley of the present invention, its vertical lifting mechanism is guided by a guide rail slider mechanism, and a pedal lifting hydraulic pump is used as a lifting power source, the lifting is stable and reliable, the bearing capacity is strong, and the pedal lifting hydraulic pump is operated Flexible and convenient, easy to use;

(4) A kind of multifunctional trolley of the present invention, its upper platform and the upper platform elevating slide seat are connected by turning hinges, the upper platform can be turned upwards and folded on the top of the push handle, and can be folded when the upper platform is not used. It does not occupy the space of the bottom platform after being folded, and it is very convenient to use; moreover, the bottom of the upper platform is also equipped with telescopic support legs, which are supported on the bottom platform by using the telescopic support legs, which increases the bearing capacity of the upper platform and makes the upper platform more reliable and stable ;At the same time, the upper platform also has a telescopic frame, which further improves the loading capacity of the trolley;

(5) A kind of multifunctional trolley of the present invention, the two sides of its upper platform are provided with handrails, and the handrail on one side is also provided with table board fixing bar and table board, can write, place when the user rests Items such as mobile phones have complete functions and can be used in various occasions, which provides great convenience for people;

(6) A kind of multifunctional trolley of the present invention, its elastic mechanism adopts controllable gas spring, can stop at any position of telescopic stroke of the bottom platform telescopic frame, and has sufficient locking force, has guaranteed the structural stability of bottom platform sex.

Description of drawings

Fig. 1 is a structural schematic diagram of an angle of a kind of multifunctional trolley of the present invention;

Fig. 2 is the structural representation of another angle of a kind of multifunctional trolley of the present invention;

Fig. 3 is a schematic diagram of the unfolded structure of the table of a multi-functional trolley of the present invention;

Fig. 4 is a schematic diagram of the folding structure of the upper platform of a multi-functional trolley according to the present invention.

Explanation of the labels in the schematic diagram:

1. Bottom platform fixed frame; 2. Bottom platform telescopic frame; 3. Front wheel; 4. Rear wheel; 5. Push handle; 6. Guide rail; frame; 10, upper platform telescopic frame; 11, slide rail; 12, flip hinge; 13, lifting drive mechanism; 14, pulley block; 14-1, first pulley; 14-2, second pulley; 14-3, The third pulley; 14-4, the fourth pulley; 15, traction rope; 16, elastic mechanism; 17, support outer frame; 18, support inner frame; 19, handrail; 20, table plate fixing rod; 21, table plate.

Detailed ways

In order to further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings and embodiments.

Example

Shown in conjunction with Fig. 1 to Fig. 4, a kind of multifunctional trolley of this embodiment comprises upper platform, bottom platform and push handle 5, and push handle 5 is fixed on the rear portion of bottom platform, and purpose pushes or pulls whole trolley to move, and upper platform passes through The vertical lifting mechanism is installed on the vertical arm of the push handle 5, and the upper platform is positioned directly above the bottom platform, and the vertical lifting mechanism can drive the upper platform to do lifting motion on the vertical arm of the push handle 5. The double-layer platform is adopted, and the upper and lower platforms can carry objects, which improves the carrying capacity of the trolley, and the upper platform can also be used as a chair for rest. Bottom platform comprises bottom fixed frame 1 and bottom platform telescopic frame 2, and bottom platform fixed frame 1 and bottom platform telescopic frame 2 telescopically cooperate, and the front portion of bottom platform telescopic frame 2 is provided with front wheel 3, and the rear of bottom platform fixed frame 1 The rear wheel 4 is provided at the bottom, and an elastic mechanism 16 for keeping the elastic extension of the bottom platform telescopic frame 2 is also provided between the bottom platform fixed frame 1 and the bottom platform telescopic frame 2. There is a linkage mechanism that drives the telescopic frame 2 of the bottom platform to retract as the upper platform rises. During the rising process of the upper platform, the telescopic frame 2 of the bottom platform can be driven to shrink inwardly by the linkage mechanism, and when the upper platform descends, under the action of the elastic mechanism 16, the telescopic frame 2 of the bottom platform can be extended synchronously, according to Different devices need to adjust the height of the upper and lower platforms, which is more flexible to use and easier to operate, which improves work efficiency and saves a lot of working time; in addition, when the upper platform is used as a seat, the partially protruding bottom platform telescopic frame 2 It can support the user's feet and is convenient for others to push. It is very suitable for luggage transportation at airports and stations, and greatly relieves the fatigue of passengers traveling long distances.

Referring to Fig. 1 and shown in Fig. 2, in the present embodiment, above-mentioned linkage mechanism comprises pulley block 14 and traction rope 15, and pulley block 14 is installed between upper platform and bottom platform fixed frame 1, and one end of traction rope 15 is connected on the bottom On the platform telescopic frame 2, the other end bypasses the pulley block 14 and is connected to the upper platform or the bottom platform fixed frame 1, and the rise of the upper platform drives the length of the traction rope 15 between the upper platform and the bottom platform fixed frame 1 to increase and pull the bottom platform to expand and contract. The frame 2 is retracted, and the linkage mechanism is simple in structure, convenient to set up, low in cost, and stable and reliable. Specifically, the above-mentioned linkage mechanism is provided with two groups on both sides of the trolley, and the pulley block 14 of each linkage mechanism includes a first pulley 14-1, a second pulley 14-2, a third pulley 14-3 and a fourth pulley 14-4, the first pulley 14-1 and the third pulley 14-3 are installed on the upper platform, the second pulley 14-2 and the fourth pulley 14-4 are installed on the bottom platform fixed frame 1, one end of the traction rope 15 Connected to the fixed frame 1 of the bottom platform, the other end bypasses the first pulley 14-1, the second pulley 14-2 and the third pulley 14-3 in turn, and after turning through the fourth pulley 14-4, it connects with the bottom platform telescopic frame 2 connections. The reciprocating winding mode of multiple groups of pulleys is adopted to increase the number of winding times of the traction rope 15 between the upper platform and the bottom platform fixed frame 1, so that the lifting stroke of the upper platform and the telescopic stroke of the bottom platform telescopic frame 2 are in multiples. Satisfied the relationship between the lifting height of the upper platform and the telescopic length of the telescopic frame 2 of the bottom platform, the telescopic frame 2 of the bottom platform can be stretched for a long distance by lifting the upper platform for a small distance, the design is reasonable and ingenious, and the setting is simple and convenient, stable and reliable.

As shown in Figure 1 and Figure 2, in this embodiment, the above-mentioned vertical lifting mechanism includes a guide rail 6, an upper platform lifting slide 7, a slider 8 and a lifting drive mechanism 13, and the guide rail 6 is vertically installed on both sides of the push handle 5 On the vertical arm of the upper platform, the upper platform lifting slide 7 is installed on the guide rail 6 through the slider 8, the lifting drive mechanism 13 is installed between the bottom platform fixing frame 1 and the upper platform lifting slide 7, and the upper platform is installed on the upper platform lifting Slide seat 7 on. Guided by guide rail slider mechanism, the lifting is stable and reliable. In addition, in this embodiment, the lifting drive mechanism 13 is preferably a foot-operated lifting hydraulic pump, which is a commercially available special lifting hydraulic oil pump for beauty chairs (or grooming chairs). To control its lifting movement, during operation, it can be stretched out by lightly stepping on the foot bar, and it can be retracted by stepping on the foot bar heavily. The hydraulic lifting pump is used as the lifting power source. The lifting is stable and reliable, with strong bearing capacity, simple and convenient operation, and improved labor. Productivity greatly improves efficiency. In addition, in this embodiment, the elastic mechanism 16 is preferably a controllable gas spring, which can stop at any position of the telescopic stroke of the bottom platform telescopic frame 2 and has sufficient locking force to ensure the structural stability of the bottom platform.

Referring to Fig. 1 and Fig. 4, in this embodiment, the upper platform and the upper platform elevating slide seat 7 are rotatably connected by a turning hinge 12, and the upper platform can be turned upside down and folded on the top of the push handle 5, without using the upper platform It can be folded when it is folded, and it does not occupy the space of the bottom platform after being folded, so it is very convenient to use. The flip hinge 12 preferably adopts a self-locking folding hinge, in which there is a self-locking pull bar in the middle, which is composed of two springs, and the self-locking pull bar can realize the self-locking function of the hinge, and has good fixability and load-bearing capacity. Strong and other advantages. In addition, the bottom of the upper platform is also equipped with telescopic support legs, which are rotatably connected with the upper platform for supporting on the bottom platform, increasing the bearing capacity of the upper platform and making the upper platform more reliable and stable. The telescopic support legs in this embodiment include a supporting frame 17 and a supporting inner frame 18 slidingly installed on the bottom of the supporting outer frame 17. Both the supporting outer frame 17 and the supporting inner frame 18 are in the shape of "凵", and the supporting frame 17 and The supporting legs on both sides of the supporting inner frame 18 are nested together to realize sliding and telescopic cooperation. A locking mechanism is also provided between the supporting outer frame 17 and the supporting inner frame 18. The locking mechanism can be arranged on the supporting outer frame 17. The fixed fastening screw, the telescopic length of the telescopic support leg can be fixed by the tightness of the fastening screw, the structure is simple, and the setting is convenient. In addition, in this embodiment, the upper platform includes an upper platform fixed frame 9 and an upper platform telescopic frame 10, and the upper platform telescopic frame 10 is installed on the upper platform fixed frame 9 through a slide rail 11, which further improves the loading capacity of the trolley. The above-mentioned slide rail 11 is preferably a commercially available steel ball slide rail, which is cheap, simple in structure, and has a good load-bearing capacity, which meets the loading requirements of the telescopic frame 10 on the upper platform and effectively increases the loading area. Different from the telescopic structure of the upper platform, the telescopic structure of the bottom platform adopts the casing structure, that is, the diameter of the bottom platform fixed frame 1 is larger than the pipe diameter of the bottom platform telescopic frame 2, and the bottom platform telescopic frame 2 is set on the bottom platform fixed frame 1 It realizes telescopic movement inside. Compared with the slide rail structure, it has simple structure, high strength and strong bearing capacity. Compared with the upper platform, it can also put more things. As shown in Figure 3, both sides of the upper platform are also provided with handrails 19, and the handrails 19 on one side are also provided with a table board fixing rod 20 and a table board 21, and the table board fixing rod 20 can be installed on the On the handrail 19, the table board 21 is rotatably installed on the table board fixed rod 20, which can be used for writing and placing articles such as mobile phones when the user has a rest. When using the table board, at first the table board fixing rod 20 is turned forward 180° together with the table board 21, and the self structure of the table board fixing rod 20 is used to support on the armrest 19, and then the table board 21 is turned inside 90°, so that The table board 21 is placed horizontally on the table board fixing rod 20, which is very convenient to use and does not take up space after being folded.

In addition, in the multifunctional trolley of this embodiment, the front wheels 3 and the rear wheels 4 both adopt self-locking universal wheels, which are very convenient and flexible to move. When in use, you only need to lightly step on the self-locking switch on the top of the wheel to lock the wheel. If you want to unlock it, you only need to gently lift the small plate to unlock the wheel.

A kind of multi-functional trolley according to the present invention, the trolley has upper and lower platforms, and the upper platform can lift and move, the bottom platform has the bottom platform telescopic frame that can stretch, the lifting movement of the upper platform and the bottom platform telescopic frame have a linkage mechanism, the upper platform It can be used as a seat while loading goods, which is convenient for resting during the delivery of goods. It not only improves the loading capacity of the trolley, but also makes the trolley have multiple functions. The upper platform and the bottom platform are organically combined through a linkage mechanism, making it easier to use. Flexible and easier to operate; at the same time, the upper platform also has a telescopic frame, which further improves the loading capacity of the trolley, and the upper platform can be flipped and folded, which is very convenient to use; in addition, the upper platform also has a folding table when used as a seat, The utility model has complete functions, can be used in various occasions, and provides great convenience to people.

The present invention and its implementations have been schematically described above, and the description is not restrictive. What is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the inventive concept of the present invention, without creatively designing a structure and an embodiment similar to the technical solution, it shall fall within the scope of protection of the present invention .

Claims (10)

1. A kind of multifunctional trolley, comprises upper platform, bottom platform and push handle (5), it is characterized in that: described push handle (5) is fixed on the rear portion of bottom platform, and described upper platform is installed on on the vertical arm of the push handle (5), and the upper platform is positioned directly above the bottom platform; the bottom platform includes a bottom platform fixed mount (1) and a bottom platform telescopic frame (2), and the bottom platform fixed mount ( 1) It is telescopically matched with the bottom platform telescopic frame (2), and the front part of the bottom platform telescopic frame (2) is provided with a front wheel (3), and the rear part of the bottom platform fixed frame (1) is provided with a rear wheel (4), An elastic mechanism (16) for keeping the bottom platform telescopic frame (2) elastically stretched out is also provided between the bottom platform fixed frame (1) and the bottom platform telescopic frame (2), and the described upper platform and the bottom platform A linkage mechanism that drives the bottom platform telescopic frame (2) to retract as the upper platform rises is also provided between the telescopic frames (2). 2. A multifunctional handcart according to claim 1, characterized in that: said linkage mechanism comprises a pulley block (14) and a traction rope (15), and said pulley block (14) is installed on the upper platform and the bottom platform Between the fixed frames (1), one end of the traction rope (15) is connected to the telescopic frame (2) of the bottom platform, and the other end is connected to the upper platform or the bottom fixed frame (1) after bypassing the pulley block (14) , the rise of the upper platform drives the length of the traction rope (15) between the upper platform and the bottom platform fixed frame (1) to increase and pull the bottom platform telescopic frame (2) to retract. 3. A kind of multifunctional trolley according to claim 2, characterized in that: said linkage mechanism is provided with two groups on both sides of the trolley, and the pulley block (14) of each linkage mechanism comprises a first pulley (14 -1), the second pulley (14-2), the third pulley (14-3) and the fourth pulley (14-4), the first pulley (14-1) and the third pulley (14-3) ) is installed on the upper platform, the second pulley (14-2) and the fourth pulley (14-4) are installed on the bottom platform fixed frame (1), and one end of the traction rope (15) is connected to On the bottom platform fixed frame (1), the other end walks around the first pulley (14-1), the second pulley (14-2) and the third pulley (14-3) successively and passes through the fourth pulley (14-4 ) is connected with the bottom platform telescopic frame (2) after turning to. 4. A kind of multifunctional trolley according to claim 3, characterized in that: said vertical lifting mechanism includes guide rail (6), upper platform lifting slide (7), slide block (8) and lifting drive mechanism ( 13), the guide rail (6) is vertically installed on the vertical arms on both sides of the push handle (5), and the upper platform lifting slide (7) is installed on the guide rail (6) through the slider (8) , the lifting drive mechanism (13) is installed between the bottom platform fixing frame (1) and the upper platform lifting slide (7), and the upper platform is installed on the upper platform lifting slide (7). 5. A multifunctional trolley according to claim 4, characterized in that: said lifting drive mechanism (13) is a pedal lifting hydraulic pump. 6. A multifunctional trolley according to claim 4, characterized in that: the upper platform and the upper platform lifting slide (7) are connected by turning hinges (12), and the upper platform can be turned upwards Fold over the top of the push handle (5). 7. A multifunctional trolley according to claim 6, characterized in that: the bottom of the upper platform is also provided with telescopic support legs, and the telescopic support legs are rotatably connected with the upper platform; The legs include a support frame (17) and a support frame (18) slidingly mounted on the bottom of the support frame (17), and a locking mechanism is also provided between the support frame (17) and the support frame (18). mechanism. 8. A kind of multifunctional trolley according to any one of claims 1 to 7, characterized in that: said upper platform comprises an upper platform fixed frame (9) and an upper platform telescopic frame (10), said upper platform The platform telescopic frame (10) is installed on the upper platform fixed frame (9) by the slide rail (11). 9. A multifunctional trolley according to claim 8, characterized in that: the two sides of the upper platform are provided with handrails (19), and the handrails (19) on one side are also provided with a table for fixing Rod (20) and table board (21), described table board fixing rod (20) can be installed on the handrail (19) in the forward flipping ground, and described table board (21) is rotatably installed on table board fixing rod ( 20) on. 10. A multifunctional trolley according to claim 1, characterized in that: said elastic mechanism (16) is a controllable gas spring.