CN108974176A - A kind of foldable shopping cart using bionic mechanical structure substitution wheel - Google Patents

Abstract

A kind of foldable shopping cart using bionic mechanical structure substitution wheel, including bionic mechanical structure and the shopping bag being set in bionic mechanical structure, the preceding pedipulator of bionic mechanical mechanism is connected with rear pedipulator by fixed frame, it is equipped with crank between the two, drives preceding pedipulator and rear pedipulator to take a step in turn by the rotation of crank.Pedipulator of the present invention and ground are point contacts, reduce the dependence to ground isoperimetric collarette border, rugged road surface can effectively be passed through, it is cleared the jumps by the height and width of step pitch, its motion profile will not change with the change of landform, the shake sense that broken terrain generates hand in pushing course can be reduced, movement is got up more steady, it can reduce wrist burden, and it does not need often to bend over that article can be placed, shopping bag can be dismantled from bionic mechanical structure, and bionic mechanical structure can also fold, therefore the foldable fractionation storage of entire shopping cart, it is convenient for carrying.

Description

A foldable shopping cart that uses a bionic mechanical structure instead of wheels

technical field

The invention relates to the technical field of machinery, in particular to a foldable shopping cart which adopts a bionic mechanical structure instead of wheels.

Background technique

The "Strandbeests" (Beach-animal) beach monster developed by Dutch engineer Theo Jansen uses wind as kinetic energy and uses a mechanical transmission structure to push the entire mechanical structure forward without using any electric accessories such as motors. The successful development of this structure has subverted the thinking mode that walking robots must use electricity as a power source, and got rid of the inherent form of relying on electronic chips to control motion. However, the bionic mechanical legs are bulky, cannot be retracted or folded, and are difficult to turn.

The home shopping trolley is a combination of shopping bags or shopping baskets and wheels. All points on the wheels of the home shopping cart are in direct contact with the ground, forming a line or surface contact form. When the ground is flat, the shopping cart moves smoothly. When the ground is rough, the household shopping cart will fluctuate up and down following the unevenness of the road surface. As a result, when the shopping cart is pulled by hand, the hand will have a strong sense of shaking and the hand comfort is not good. Moreover, household shopping carts are mostly pulled by hand to drive the movement of the trolley. During the hand-pulling process, the end of the shopping cart with wheels touches the ground, and the end with the armrest acts on the hand, resulting in an angle of 30-60 degrees between the shopping trolley and the ground. The component force generated by the total gravity of food and ingredients acts on the hands, and the hand-pull shopping cart can only disperse part of the force, while the other part of the force acts on the hands, resulting in heavy loads on the hands and wrists.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a foldable shopping cart which adopts a bionic mechanical structure instead of wheels, which can reduce the thrust and the shaking feeling caused by the uneven ground to the hand during the pushing process, and the movement is more stable, which can reduce the The burden on the wrist can reduce hand shake, and you can place items without bending over frequently. It is dignified and can be folded for storage.

In order to achieve the above object, the present invention adopts the following technical solutions:

A foldable shopping cart using a bionic mechanical structure instead of wheels, comprising a bionic mechanical structure and a shopping bag arranged on the bionic mechanical structure, the bionic mechanical mechanism includes a connecting rod and mechanical legs arranged at both ends of the connecting rod , the connecting rod includes a front connecting rod and a rear connecting rod, the shopping bag is arranged on the front connecting rod and the rear connecting rod, and the two ends of the front connecting rod and the rear connecting rod are respectively provided with A front mechanical leg and a rear mechanical leg, the front mechanical leg and the rear mechanical leg are connected by a fixed frame, a crank is arranged between the front mechanical leg and the rear mechanical leg, and the crank passes through the fixed frame In the middle of the crank, the front mechanical leg and the rear mechanical leg are driven forward in turn by the rotation of the crank;

The structure of the front mechanical leg is the same as that of the rear mechanical leg, the front mechanical leg or/and the rear mechanical leg include a first movable part and a second movable part hinged to the crank, the first movable part The other end of a movable part away from the crank is connected to the first parallel connecting part, a third movable part is hinged on the first parallel connecting part, and the end of the third movable part away from the first parallel connecting part is hinged On the fixed frame, a fourth movable part and a fifth movable part are hinged side by side at the hinge position on the fixed frame, and the end of the fourth movable part away from the fixed frame is connected to the second parallel connecting part , the end of the second movable part away from the crank is connected to the second parallel connecting part, and the crank, the first movable part, the third movable part and the fixed frame form a first crank rocker A rod mechanism, the crank, the second movable member, the fourth movable member and the fixed frame form a second crank rocker mechanism;

A leg is also hinged on the second parallel connector, the middle part of the leg is hinged to the second parallel connector, one end of the leg touches the ground, and the other end is hinged to the sixth movable part, the The end of the sixth movable part away from the leg is hinged to the fifth movable part, and the fourth movable part, the fifth movable part, the sixth movable part and the legs constitute a double rocker mechanism , driving the first crank-rocker mechanism and the second crank-rocker mechanism to move through the crank, driving the double rocker mechanism to move, thereby driving the outrigger to move;

A sliding piece is also hinged on the first parallel connecting piece, and a slot is provided on the fifth movable piece, and the end of the sliding piece away from the first parallel connecting piece is buckled in the slot, so as to The angle between the third movable part and the fifth movable part is fixed, and when the sliding part breaks away from the slot, the front mechanical leg or/and the rear mechanical leg are folded.

Further, two ends of the front connecting rod are respectively connected with two parallel front mechanical legs, and two ends of the rear connecting rod are respectively connected with two parallel rear mechanical legs.

Further, the mechanical legs located at both ends of the connecting rod are driven by two independent cranks, and the motion states of the mechanical legs at both ends are the same or different, so as to realize straight travel or turning.

Further, the connecting rod is arranged telescopically.

Further, one end of the third movable part, the fourth movable part and the fifth movable part hinged with the fixed frame is provided with a round head, and the middle part of the second movable part is offset relative to its two ends set up.

Further, the slot is L-shaped, one side of its opening is located at the bottom of the fifth movable part, and the end of the sliding part is provided with a buckle, and the buckle slides in along the opening of the slot inside the card slot.

Further, the angle between the third movable part and the fifth movable part is 86 degrees.

Further, hard objects are embedded on both sides of the shopping bag, and the bottom of the hard object is provided with an engaging groove, and the engaging groove is engaged with the front connecting rod and the rear connecting rod.

Further, the shopping bag or/and the hard paper object are provided with a hard handle, and the hard handle can rotate at 360°.

Further, an armrest is provided on the hard handle, and the armrest is arranged in an arc and has a thickness greater than that of the hard handle.

Beneficial effects of the present invention:

The bionic mechanical structure is used to replace the original wheels of the shopping cart, and the shopping bag is set on the bionic mechanical structure, and the crank is used to drive the mechanical legs to move forward, and only a slight force is required on the shopping bag. The mechanical legs are in point contact with the ground. Reduce the dependence on the surrounding environment such as the ground, can effectively pass through rough roads, and cross obstacles through the height and width of the step. The shaking caused by the ground to the hand makes the movement more stable; the thrust required for the movement of the shopping cart is small, which can reduce the burden on the wrist and reduce the shaking of the hand; the height of the shopping cart is in line with the principles of ergonomics, and there is no need to bend over frequently Items can be placed in a dignified atmosphere; the shopping cart can be disassembled from the bionic mechanical structure, and the bionic mechanical structure can also be folded, so the entire shopping cart can be folded and split for storage, making it easy to carry.

Description of drawings

Fig. 1 is the structure schematic diagram of the collapsible shopping cart that adopts bionic mechanical structure to replace wheels in the present invention;

Fig. 2 is the top view of the collapsible shopping cart which adopts bionic mechanical structure instead of wheels in the present invention;

Fig. 3 is a structural schematic diagram of the connecting rod in the collapsible shopping cart of the present invention;

Fig. 4 is a schematic diagram of the trajectory of the collapsible shopping cart of the present invention when turning;

Fig. 5 is a side view of the collapsible shopping cart using a bionic mechanical structure instead of wheels according to the present invention;

Fig. 6 is a schematic structural view of a single mechanical leg in the single-sided mechanical leg of the present invention;

Fig. 7 is a schematic structural diagram of the connection between the sliding part and the fifth movable part in the one-sided mechanical leg of the present invention;

Fig. 8 is a structural schematic diagram of adding an I-shaped structure to the leg of the mechanical leg of the present invention;

Fig. 9 is a structural schematic diagram in which the bottom of the leg of the mechanical leg of the present invention is set as a semicircle;

Fig. 10 is a schematic diagram showing that the mechanical leg of the present invention does not interfere with the second movable part when it moves;

Fig. 11 is a schematic diagram of the movement process of the unilateral mechanical leg of the present invention;

Fig. 12 is a structural schematic diagram of a shopping bag in a collapsible shopping cart that uses a bionic mechanical structure instead of wheels in the present invention;

In the figure, 1—bionic mechanical structure, 2—front connecting rod, 3—rear connecting rod, 4—front mechanical leg, 5—rear mechanical leg, 6—fixed frame, 7—crank, 8—first movable part, 9 - the second movable part, 10 - the first parallel connecting part, 11 - the third movable part, 12 - the fourth movable part, 13 - the fifth movable part, 14 - the second parallel connecting part, 15 - the leg, 16 - The sixth movable part, 17-sliding part, 18-buckle, 19-card slot, 20-round head, 21-shopping bag, 22-hard object, 23-engaging slot, 24-small slot, 25-hard Quality handle, 24-handrail.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

As shown in Fig. 1, the present invention provides a kind of collapsible shopping cart that adopts bionic mechanical structure to replace wheels, comprises bionic mechanical structure 1 and is arranged on the shopping bag 21 on described bionic mechanical structure 1, and shopping bag 21 can be from bionic mechanical structure 1 on and off.

As shown in Figure 1 and Figure 2, the bionic mechanical structure 1 includes a connecting rod and mechanical legs arranged at both ends of the connecting rod, the connecting rod includes a front connecting rod 2 and a rear connecting rod 3, and a shopping bag 21 is arranged on the front connecting rod 2 and the rear connecting rod 3, the two ends of the front connecting rod 2 and the rear connecting rod 3 are respectively provided with a front mechanical leg 4 and a rear mechanical leg 5, and the front mechanical leg 4 and the rear mechanical leg 5 are connected by a fixed frame 6, and the front mechanical leg 5 and the rear mechanical leg A crank 7 is arranged between the legs 6, and the middle part of the crank 7 passes through the middle part of the fixed frame 6, and the rotation of the crank 7 drives the front mechanical leg 4 and the rear mechanical leg 5 to step forward in turn.

As shown in Figure 2 and Figure 3, in order to reduce the overall volume of the shopping cart, the number of mechanical legs should be reduced as much as possible. The mechanical legs on one side have 1-2 landing points when walking, and the minimum number of landing points is calculated to ensure the entire mechanical leg structure. To be able to stand and walk stably requires at least 4 landing points, that is, 4 mechanical legs need to be combined side by side. In this embodiment, two ends of the front connecting rod 2 are respectively connected with two parallel front mechanical legs 4 , and two ends of the rear connecting rod 3 are respectively connected with two parallel rear mechanical legs 5 . As a shopping cart structure that can carry items, the mechanical legs act as wheels to move forward, and the four mechanical legs are fixed side by side, with a place reserved in the middle for placing items. In order to make the left and right mechanical legs advance side by side, there must be connecting rods 2 and 3 in the middle, and the connecting rods 2 and 3 also serve as force rods to support the weight of the object. Returning to the original design intention of reducing the size, the middle parts of the connecting rods 2 and 3 adopt a telescopic design, as shown in Figure 3, the connecting rods 2 and 3 are divided into three parts, and the front and rear parts are respectively installed inside the two parallel mechanical legs to play a fixed role, and the front and rear parts The diameter is large, and the middle part of the connecting rod can be accommodated. The diameter of the middle part of the connecting rod 2 and 3 is smaller than its front and rear parts. When it is stretched, it is embedded in the front and rear parts of the connecting rod. The telescopic setting of the connecting rod 2 and 3 can shorten the volume of the entire mechanical structure .

As shown in Fig. 2 and Fig. 4, in order to make the shopping cart of the present invention have a steering function, the mechanical legs located at the two ends of the connecting rod are driven by two independent cranks 7, which cancels the constraint of the cranks on the mechanical legs at both ends, and each independent crank 7 It only acts on the mechanical legs on the same side, so that the motion states of the mechanical legs at both ends are the same or different. When the motion states of the two are the same, they keep going straight. When the shopping cart needs to turn, the mechanical legs on both sides are driven by the principle of differential rotation around the same center. When there is a speed difference in the middle, the purpose of turning is achieved.

As shown in FIG. 5 to FIG. 7 , the one-sided mechanical leg includes a front mechanical leg 4 and a rear mechanical leg 5 , both of which have the same structure and are arranged symmetrically with respect to the crank 7 . The front mechanical leg 4 and the rear mechanical leg 5 are connected by a fixed frame 6, and the middle part of the crank 7 passes through the middle part of the fixed frame 6, and can rotate relative to the fixed frame 6. The first movable part 8 and the second movable part 9, the other end of the first movable part 8 away from the crank 7 is connected to the first parallel connecting part 10, and the third movable part 11 and the sliding part are hinged on the first parallel connecting part 10 17, the end of the third movable part 11 away from the first parallel connecting part 10 is hinged to the fixed frame 6, and the fourth movable part 12 and the fifth movable part 13 are also hinged side by side on the fixed frame 6 at the hinged position, the fourth movable part One end of the member 12 away from the fixed frame 6 is connected to the second parallel connecting member 14, and one end of the second movable member 9 away from the crank 7 is connected to the second parallel connecting member 14, the crank 7, the first movable member 8, and the third movable member 11 And fixed mount 6 forms the first crank-rocker mechanism, and crank 7, second movable member structure 9, the 4th movable member 12 and fixed mount 6 constitute the second crank-rocker mechanism.

Also hinged with support leg 15 on the second parallel connector 14, support leg 15 is L-shaped, and the middle part of support leg 15 is hinged on the second parallel connector 14, and one end of support leg 15 touches the ground, and the other end is hinged with the sixth activity. Part 16, the sixth movable part 16 is hinged on the fifth movable part 13 away from the end of the supporting leg 15, the fourth movable part 12, the fifth movable part 13, the sixth movable part 16 and the supporting leg 15 constitute a double rocker mechanism, through The crank 7 drives the first crank-rocker mechanism and the second crank-rocker mechanism to move, drives the double-rocker mechanism to move, thereby drives the supporting leg 15 to move, and makes the supporting leg 15 move forward. Through the first parallel connecting piece 10 and the second parallel connecting piece 14, the transition from two-dimensional to three-dimensional can be realized, so that the movements of the first crank-rocker mechanism, the second crank-rocker mechanism and the double-rocker mechanism are not in the same plane , to avoid interference.

The first parallel connector 10 is also hinged with a sliding member 17, the fifth movable member 13 is provided with a slot 19, and the end of the slider 17 away from the first parallel connector 10 is provided with a buckle 18, and the buckle 18 is clamped on In the slot 19, to fix the angle between the third movable part 11 and the fifth movable part 13, when the sliding part 17 leaves the slot 19, the front mechanical leg 4 and/or the rear mechanical leg 5 can be folded. In this embodiment, the slot 19 is L-shaped, and one side of its opening is located at the bottom of the fifth movable part 13. The end of the sliding part 17 is provided with a buckle 18, and the buckle 18 slides in along the opening of the slot 19. And it is fixed in the draw-in slot 19, so that when the shopping cart is walking, the third movable part 11 and the fifth movable part 13 maintain an angle of 86 degrees.

Ensure that the included angle between the third movable part 11 and the fifth movable part 13 of the component is 86 degrees, and the length of the sliding part 17 measured accurately is 231.53 mm. When assembling, the fifth movable part 13 in parallel is used as a sliding guide rail, and the sliding part 17 slides into the slot 19 along the sliding guide rail, and the slot 19 fixes it. During disassembly, lift up the fifth movable part 13 of the member to separate the draw-in groove 19 from the slider 17, and the slider 17, the fifth movable part 13, the sixth movable part 16 and the supporting legs 15 etc. hang down naturally due to their own weight. The sliding part 17 is always in the double rocker mechanism, and the range of movement is limited by the fourth movable part 12, so that no misalignment occurs and is easy to control.

As shown in Figures 8 and 9, the outrigger 15 touches the ground. In order to coordinate the movement, the legs of the outrigger 15 are designed to be semicircular to reduce friction. If necessary, a silicone cushion can be added to wrap the ground end to buffer the pressure. The area of the changed parts is reduced by 1/3 of the original, and the force bearing capacity of the legs is weakened. Therefore, the I-shaped structure design is adopted at the grounding end, which enhances the bending resistance and increases the load-bearing capacity.

As shown in Fig. 10, in the embodiment of the present invention, use thickness is 4 millimeters, and width is 15 millimeters, and the flaky strip of unequal length is assembled, wherein the 3rd movable part 11, the 4th movable part 12 and the 5th movable part 13 and Fixed frame 6 links to each other, belongs to the greater component of force, and component assembly hole must be identical with fixed frame 6 assembly holes, is 6 millimeters, therefore, the 3rd movable part 11, the 4th movable part 12 and the 5th movable part 13 and fixed The hinged end of frame 6 must be provided with round head 20, and the diameter of round head 20 is 21 millimeters, thereby increasing the force range. Due to the addition of the round head 20, the second movable part 9 will interfere with the round head 20 during the movement, causing the model to fail to run. Therefore, the second movable part 9 is improved, and the middle part of the improved second movable part 9 is relatively The two ends are offset to leave space for the third movable part 11, the fourth movable part 12 and the fifth movable part 13, so that the model can run smoothly without interference.

As shown in Figure 11, it is a schematic diagram of the movement process of the unilateral mechanical leg. It can be seen from the figure that the outrigger 15 of the bionic mechanical structure 1 is in point contact with the ground, which is different from the surface contact form of the wheeled structure with the ground, which can reduce the impact on the ground. Dependence on the surrounding environment such as the ground. The movement of the outrigger 15 of the bionic mechanical structure 1 is a process of "touching the ground-rising-returning-falling-touching the ground", which can effectively pass through rough roads and cross obstacles through the height and width of the step. Different from the wheel axle, the movement track of the mechanical leg is within a certain range of unevenness on the ground, and will not change with the change of the terrain, making the movement more stable.

As shown in Fig. 1, Fig. 5 and Fig. 12, the shopping cart and the shopping bag 21 are detachably designed. When the shopping cart is combined with the shopping bag, it can be used as a side push trolley; when disassembled, the shopping bag 21 can be used alone, and the shopping cart can be folded and placed to increase the use function of the product. The above-mentioned telescopic connecting rod can bear the weight of the article, and a space for placing the article is reserved between the mechanical legs on both sides. Therefore, the front connecting rod 2 and the rear connecting rod 3 are used as stress devices, and the shopping bag 21 is designed in a prescribed space. Both sides of the shopping bag 21 are embedded with hard objects 22 to fix the shopping bag 21 so that its shape will not be deformed. The bottom of the hard object 22 is provided with an engaging groove 23, and the engaging groove 23 is buckled on the front connecting rod 2 and On the rear link 3. As shown in Figure 3, the two ends of the connecting rods 2 and 3 are provided with small grooves 24, which are used to fix the two sides of the shopping bag 21, so that the whole bag is supported and fixed, and will not slide along the connecting rods. During the process, the bottom of the bag sags and deforms due to the weight of the items, which also reduces the situation where the sides of the bag move closer to the middle. It is more convenient to use the bag without removing it by hand. In other embodiments, the structure of the shopping bag 21 can be designed in various styles according to needs, so as to increase the aesthetics and ease of use.

As shown in Figure 5 and Figure 12, the forward and backward of the shopping cart or turning depends on the thrust of the user. There is no special handle for the consumer to use on the shopping cart. Instead, it is a hard handle 25 connected to the shopping bag 21. As long as the Active force acts on the shopping bag 21, and the shopping bag 21 can drive the shopping cart forward. This active force can pull the shopping bag 21 through the hard handle 25 on the shopping bag 21, and the shopping bag 21 pulls the shopping cart to realize motion. The hard handle 25 on the shopping bag 21 can rotate 360 degrees, can adapt to various torsion angles of the wrist, and slows down the wear and tear of the wrist bone. A handrail 26 is set on the hard handle 25, and the handrail 26 has a certain curvature and thickness. The arc-shaped setting of the handrail 26 and the thickness greater than the thickness of the hard handle 25 can increase the contact area between the palm and the handrail 26 and reduce the pressure. The height between the handrail 26 on the shopping bag 21 and the ground during use is 820.47 mm. According to ergonomic design rules: the applicable elbow height range for men and women is 889-1118 mm. Research shows that the most comfortable height of the working surface for standing use is 76 mm below the human elbow joint. According to the analysis, shopping The height range of the armrest 26 of the bag 21 from the ground should be 813-1042 mm, so the height between the armrest 26 and the ground is 820.47 mm, which conforms to the principles of ergonomics. Raising the height of the shopping bag 21 can effectively reduce the necessary bending degree of the waist when placing items in the shopping cart, so as to reduce the pressure on the waist. The lowest part of the shopping bag 21 is 339.92 millimeters from the ground, and the height of the hand is about 586.45 millimeters. It is not necessary to bend down to place articles, and a little bending can place smaller or shorter articles. The sack design of the shopping bag 21 is an open design, which changes from a traditional vertical shopping cart to a vertical one, which improves the center of gravity of the shopping cart, increases the viewing area, and makes it clear at a glance to the purchased items.

The target group of the shopping cart of the present invention is women who go shopping in farmers' markets. The overall volume of the shopping cart is larger than that of ordinary household shopping carts, and the bulky items will give people a sense of momentum and a feeling that cannot be ignored. When using this shopping cart, it will bring a sense of solemnity, so that consumers have a sense of ritual in the process of purchasing ingredients, thinking that they have come to the farmer’s market with an important and sacred task, and take the purchase of ingredients seriously and positively. An activity, not a burden of living. The emergence of the shopping cart redefines daily life activities, allowing consumers to know how to respect life and enjoy life.

The shopping cart of the present invention is used in the whole process of going to and from the farmer’s market and purchasing ingredients in the farmer’s market. Its usage scenarios include: (1) walking to the farmer’s market: before going out, the shopping cart is assembled, and the shopping cart is pushed by the handrail to the farmer’s market In the market, buy the ingredients and put them in the shopping bag, push the shopping cart home with the armrest, lift the shopping bag to organize the ingredients, fold the shopping cart and store it. (2) Use the bus to go to the farmer's market: before going out, assemble the shopping cart, push the shopping cart to the bus stop with the handrail, carry the shopping bag on the shoulder and carry the folded shopping cart on the bus, assemble the shopping cart after getting off the bus, and buy Put the ingredients in the shopping bag, repeat the above steps to return home, lift the shopping bag to organize the ingredients, fold the shopping cart and store it. (3) Go to the farmer’s market by private car: the folded shopping cart can be placed in the trunk for a long time, drive to the farmer’s market, assemble the shopping cart after getting off the car, buy ingredients and put them in the shopping bag, lift the shopping bag to put it in the trunk, and fold the shopping cart Put the mechanical leg part of the car in the trunk, drive home, and put out the shopping bag to organize the ingredients. The mechanical leg part may not be taken out. After taking out the ingredients, the shopping bag can be placed in the trunk for later use.

Considering the cost and weight, the bionic mechanical legs are planned to use plastic materials. After analysis, the analysis results show that the performance of ABS is between engineering plastics and general-purpose plastics. The heat resistance and mechanical energy are worse than engineering plastics. It has good mechanical energy and is easy to form and process. , high surface hardness, suitable for mechanical leg processing and production. The hard objects, hard handles and armrests on both sides of the shopping bag are also made of ABS material. The shopping bag is required to be waterproof and tear-proof. Generally, the shopping bags on the shopping cart use Oxford cloth, which is strong, wear-resistant, durable, waterproof, Strong load-bearing and freely configurable colors, the shopping bag in this embodiment is intended to be sewn with Oxford cloth.

In the present invention, the bionic mechanical structure 1 is used to replace the original wheels of the shopping cart, and a shopping bag 21 is arranged on the bionic mechanical structure 1, and the crank 7 is used to drive the mechanical legs to move forward, and only a little force is required for the shopping bag, and the mechanical legs It is in point contact with the ground, reducing the dependence on the surrounding environment such as the ground. It can effectively pass through rough roads and cross obstacles through the height and width of the step. Its trajectory will not change as the terrain changes, which can reduce During the pushing process, the uneven ground will cause the shaking of the hand, and the movement will be more stable; the thrust required for the movement of the shopping cart is small, which can reduce the burden on the wrist and reduce the shaking of the hand; the height of the shopping cart is in line with the principles of ergonomics , You don’t need to bend over often to place items, dignified and elegant; the shopping cart can be disassembled from the bionic mechanical structure, and the bionic mechanical structure can also be folded, so the entire shopping cart can be folded and split for storage, making it easy to carry.

The above examples are to illustrate the technical solutions of the present invention rather than limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the present invention. The purpose and scope of the technical solution should be covered by the scope of the claims of the present invention.

Claims (10)

1. A foldable shopping cart that adopts a bionic mechanical structure instead of wheels, it is characterized in that it includes: a bionic mechanical structure and a shopping bag arranged on the bionic mechanical structure, the bionic mechanical mechanism includes a connecting rod and is arranged on the Mechanical legs at both ends of the connecting rod, the connecting rod includes a front connecting rod and a rear connecting rod, the shopping bag is arranged on the front connecting rod and the rear connecting rod, the front connecting rod and the rear connecting rod The two ends of the rod are respectively provided with a front mechanical leg and a rear mechanical leg, the front mechanical leg and the rear mechanical leg are connected by a fixing frame, a crank is arranged between the front mechanical leg and the rear mechanical leg, and the The crank passes through the middle of the fixed frame, and the rotation of the crank drives the front mechanical leg and the rear mechanical leg to take turns; The structure of the front mechanical leg is the same as that of the rear mechanical leg, the front mechanical leg or/and the rear mechanical leg include a first movable part and a second movable part hinged to the crank, the first movable part The other end of a movable part away from the crank is connected to the first parallel connecting part, a third movable part is hinged on the first parallel connecting part, and the end of the third movable part away from the first parallel connecting part is hinged On the fixed frame, a fourth movable part and a fifth movable part are hinged side by side at the hinge position on the fixed frame, and the end of the fourth movable part away from the fixed frame is connected to the second parallel connecting part , the end of the second movable part away from the crank is connected to the second parallel connecting part, and the crank, the first movable part, the third movable part and the fixed frame form a first crank rocker A rod mechanism, the crank, the second movable member, the fourth movable member and the fixed frame form a second crank rocker mechanism; A leg is also hinged on the second parallel connector, the middle part of the leg is hinged to the second parallel connector, one end of the leg touches the ground, and the other end is hinged to the sixth movable part, the The end of the sixth movable part away from the leg is hinged to the fifth movable part, and the fourth movable part, the fifth movable part, the sixth movable part and the legs constitute a double rocker mechanism , driving the first crank-rocker mechanism and the second crank-rocker mechanism to move through the crank, driving the double rocker mechanism to move, thereby driving the outrigger to move; A sliding piece is also hinged on the first parallel connecting piece, and a slot is provided on the fifth movable piece, and the end of the sliding piece away from the first parallel connecting piece is buckled in the slot, so as to The angle between the third movable part and the fifth movable part is fixed, and when the sliding part breaks away from the slot, the front mechanical leg or/and the rear mechanical leg are folded. 2. The foldable shopping cart using a bionic mechanical structure instead of wheels according to claim 1, wherein two ends of the front connecting rod are respectively connected to two parallel front mechanical legs, and the rear connecting rod The two ends of the rod are respectively connected with two rear mechanical legs arranged side by side. 3. The foldable shopping cart using a bionic mechanical structure instead of wheels according to claim 1, wherein the mechanical legs located at both ends of the connecting rod are driven by two independent cranks, and the mechanical legs at both ends The state of motion is the same or different for going straight or turning. 4. The foldable shopping cart adopting a bionic mechanical structure instead of wheels according to claim 1, characterized in that: the connecting rod is arranged telescopically. 5. The foldable shopping cart adopting bionic mechanical structure instead of wheels according to claim 1, characterized in that: the third movable part, the fourth movable part, the fifth movable part and the fixed frame One end of the hinge is provided with a round head, and the middle part of the second movable part is offset relative to its two ends. 6. The foldable shopping cart using a bionic mechanical structure instead of wheels according to claim 1, characterized in that: the slot is L-shaped, and one side of its opening is located at the bottom of the fifth movable part, and the The end of the slider is provided with a buckle, and the buckle slides into the slot along the opening of the slot. 7. The foldable shopping cart using a bionic mechanical structure instead of wheels according to claim 1, wherein the angle between the third movable part and the fifth movable part is 86 degrees. 8. The foldable shopping cart using bionic mechanical structure instead of wheels according to claim 1, characterized in that: hard objects are embedded on both sides of the shopping bag, and the bottom of the hard object is provided with an engaging groove , the engaging groove is buckled on the front connecting rod and the rear connecting rod. 9. The foldable shopping cart using bionic mechanical structure instead of wheels according to claim 8, characterized in that: the shopping bag or/and the hard paper object are provided with a hard handle, and the hard handle Hand can rotate 360. 10. The foldable shopping cart adopting a bionic mechanical structure instead of wheels according to claim 9, characterized in that: the hard handle is provided with an armrest, and the armrest is arc-shaped and thicker than the hard handle thickness of.