CN211308622U

CN211308622U - Multifunctional electric shopping cart

Info

Publication number: CN211308622U
Application number: CN201922183876.5U
Authority: CN
Inventors: 张兴宇; 刘永臣; 佘昊润; 马泽坤; 易小丰; 柏定琳; 孙丽
Original assignee: Huaiyin Institute of Technology
Current assignee: Zhangjiakou Dengyuan Trading Co ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-08-21
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses a multifunctional electric shopping cart, which comprises a frame component, wheels, a shopping basket, a driving system, a steering system and a braking system; the frame assembly comprises a front frame and a rear frame; the rear frame is inserted into the front frame, a telescopic device is arranged between the front frame and the rear frame, a seat frame is arranged at the rear end of the rear frame, and a foldable seat is rotatably connected to the seat frame; the driving system comprises a speed reducer, a motor, a controller, a power supply, a foot-operated speed regulator and a switch assembly, wherein the motor, the controller, the power supply, the foot-operated speed regulator and the switch assembly are connected through a lead; the steering system comprises a first steering shaft which is rotatably connected to the support frame, and the top end of the first steering shaft is connected with a deflection steering wheel through a turnover device. The utility model discloses a telescopic frame, matching steering wheel, the folding seat that shifts can realize the driving mode and the hand push mode of electronic shopping cart, do benefit to and slow down shopping fatigue, increase shopping enjoyment, improve the shopping convenience, have extensive application prospect.

Description

Multifunctional electric shopping cart

Technical Field

The utility model relates to a shopping equipment technical field especially relates to a multi-functional electronic shopping cart.

Background

The shopping cart is an indispensable tool in our lives, can improve more demands of buyers on one hand and further improve the volume of deals of sellers on the other hand, and can achieve a win-win result of killing two birds at a stroke.

With the improvement of living standard, the times of shopping are more and more frequent. In addition, the shopping cart is difficult to control due to inertia effect when people work for a long time and push the cart or the portable shopping basket for a long time.

In addition, the traditional hand-push shopping cart cannot be used when the disabled goes to a supermarket for shopping; in addition, the elderly are weak and the elderly feel tired more and more when walking for a long time, which causes inconvenience.

A few electric shopping carts are adopted in some domestic supermarkets, but the electric shopping carts are labor-saving to push, but the problem of walking fatigue cannot be solved; in addition, some supermarkets also adopt driving shopping carts, but the shopping carts can only be driven, and people need to frequently go up and down when selecting commodities, so that the shopping is not very convenient for people to shop, and the pleasure brought to people by shopping is lost.

Therefore, there is a need for a multifunctional electric shopping cart that solves the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-functional electronic shopping cart has adopted telescopic frame, matches steering wheel, the folding seat that shifts, can realize the driving mode and the hand push mode of electronic shopping cart, does benefit to and slows down shopping fatigue, increases shopping enjoyment, improves the shopping convenience to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a multifunctional electric shopping cart comprises a cart frame assembly, wheels, a shopping basket, a driving system, a steering system and a braking system;

the frame assembly comprises a front frame and a rear frame; the rear frame is inserted into the front frame, a telescopic device is arranged between the front frame and the rear frame, a seat frame is arranged at the rear end of the rear frame, and a foldable seat is rotatably connected to the seat frame; a pedal bedplate and an inclined supporting frame are arranged above the rear end of the front frame, and the shopping basket is connected to the supporting frame;

the elevator car comprises a car frame, a car wheel, a front car frame, a rear car frame, a car wheel, a car door, a car;

the driving system comprises a speed reducer, a motor, a controller, a power supply, a foot-operated speed regulator and a switch assembly, wherein the motor, the controller, the power supply, the foot-operated speed regulator and the switch assembly are connected through a lead; the controller, the power supply and the foot-operated speed regulator are arranged on the front frame, the motor is in driving connection with the speed reducer, the speed reducer is fixedly connected to the rear frame, and the power output end of the speed reducer is in driving connection with the rear wheel B;

the steering system comprises a first steering shaft which is rotatably connected to the support frame, the top end of the first steering shaft is connected with a deflection steering wheel through a turnover device, the first steering shaft is connected to a second steering shaft in a transmission manner, the second steering shaft is connected to a central steering mechanism in a transmission manner, the central steering mechanism is arranged on the frame assembly, two ends of the central steering mechanism output a front wheel steering shaft and a rear wheel steering shaft assembly, the front wheel steering shaft and the rear wheel steering shaft assembly are respectively connected to the front frame and the rear frame in a rotating manner, the end parts of the front wheel steering shaft and the rear wheel steering shaft assembly are respectively provided with a front swing arm and a rear swing arm, the front swing arm pushes or pulls the front wheel A, the front wheel A pushes or pulls the front wheel B, the rear swing arm pushes or pulls the rear wheel B, and the rear wheel B pushes or;

the brake system comprises a brake pedal, a brake pump assembly, a brake disc and calipers; the brake pedal is hinged to the front frame, the brake pump assembly is fixedly connected to the front frame, and the bottom of the brake pedal is hinged to the brake pump assembly; the brake disc and the calipers are fixedly connected to the steering knuckle, the brake disc penetrates through gaps of the calipers, and the brake pump assembly is connected with the calipers through oil pipes.

The utility model adopts the further improvement scheme that the side surface of the seat frame is triangular, the bottom of the seat cushion of the seat is fixedly connected with a limiting rod, and the back of the seat is rotationally connected with the seat cushion; the limiting rod is connected with the seat frame through a hinge, and when the limiting rod is turned backwards to a limiting position, the seat cushion is in a horizontal state; two sides of the rear end of the front frame are fixedly connected with a first cross rod, and two elevator wheels are fixedly connected to the bottom of the first cross rod; the support frame is U-shaped, two ends of the support frame are obliquely and fixedly connected to the first cross rod, the top of the support frame is fixedly connected with a control panel, and the switch assembly comprises a start-stop switch, a forward switch and a backward switch and is fixedly connected to the control panel; four L-shaped plates are fixedly connected to the front frame to form an accommodating cavity, and a power supply is placed in the accommodating cavity.

The utility model has the further improvement that a large placing plate is arranged on the front frame below the shopping basket; the front end and the rear end of the large placing plate are connected with the front frame through the supports, the rear end and the two sides of the large placing plate are fixedly connected with the baffle plates, the power supply is positioned below the large placing plate, and the controller is fixedly connected with the bottom of the large placing plate; the inner side of the front frame is fixedly connected with a second cross rod, the inner side of the rear frame is fixedly connected with a third cross rod, the telescopic devices are two electric push rods which are symmetrically arranged, and two ends of each electric push rod are respectively hinged to the second cross rod and the third cross rod; the switch assembly further comprises a frame adjusting switch fixedly connected to the top end of the support frame, and the electric push rod and the frame adjusting switch are connected with a power supply through wires.

The utility model has the further improvement scheme that four groups of rollers are arranged at the rear end of the front frame, each group of rollers is two rollers which are arranged up and down, the central shafts of the rollers are fixedly connected to the front frame through bearing seats, and part of each roller passes through the notch and extends into the front frame and contacts with the outer wall of the rear frame; when the rear frame is completely extended, the front end of the rear frame does not separate from the four groups of rollers.

The utility model has the further improvement scheme that two sides of the front end of the front frame and one side of the rear end of the rear frame are fixedly connected with lug plate groups, the shaft sleeve is connected with the lug plate groups through the pivot rotation, the outer wall of the shaft sleeve is vertically and fixedly connected with a wheel shaft, and the front wheel A, the front wheel B and the rear wheel A are fixedly connected on the wheel shaft; the steering knuckle comprises a shell, a spherical support, an inner half shaft and an outer half shaft, wherein the spherical support is fixedly connected to the bracket, and the shell is connected with the spherical support through a pin shaft; the inner half shaft is rotationally connected to the inner sleeve at one end of the spherical support, the outer half shaft is rotationally connected to the outer sleeve at one end of the shell, the inner half shaft is connected with the outer half shaft through a first universal joint, the inner half shaft is fixedly connected to the speed reducer, and the rear wheel B is fixedly connected to the outer half shaft.

The utility model has the further improvement scheme that the speed reducer is a planetary gear speed reducer, the motor is connected with the input shaft through spline driving, the input shaft is fixedly connected with the sun wheel, and the output shaft fixed on the planet carrier is connected with the inner half shaft through a spline; the foot-operated speed regulator is pinned to the right side of the front frame, and the foot-operated speed regulator is exposed above the foot-operated bedplate.

The utility model has the further improvement that the brake pedal is connected to the vertical rod on the left side of the front frame through a pin shaft, the brake pedal is exposed above the pedal bedplate, and the brake pump assembly is obliquely and fixedly connected to the side part of the vertical rod; the outer half shaft is fixedly connected with a flange plate, the brake disc is fixedly connected to the flange plate, the calipers are fixedly connected to the supporting plate, and the supporting plate is fixedly connected to the shell.

The utility model has the further improvement scheme that the first steering shaft is connected with the second steering shaft through a second universal joint; the central steering mechanism comprises a frame and three bevel gears, the three bevel gears are arranged in the frame in an inverted T-shaped meshed manner, the frame is fixedly connected to the front frame through a supporting plate, the second steering shaft is rotatably connected to the frame and fixedly connected to the bevel gear at the top end, and the front wheel steering shaft is rotatably connected to the frame and fixedly connected to the bevel gear at the front end; the rear wheel steering shaft assembly comprises a spline shaft and a spline sleeve which are in sliding connection, the spline shaft is rotatably connected to the frame and is fixedly connected to the bevel gear at the rear end, the rear swing arm is fixedly connected to the spline sleeve, the outer wall of the spline sleeve is sleeved with a thrust bearing, and the thrust bearing is fixedly connected with the rear frame through a fourth cross rod.

The utility model discloses a further improvement scheme is, the steering system still includes steering arm a, steering arm b, steering arm c, steering arm d, preceding threaded rod, back threaded rod and both ends screw thread connect with the steering column a, steering column b, steering column c and the steering column d of bulb, the joint of bulb and steering column is equipped with lock nut; the steering arm a, the steering arm B and the steering arm c are respectively and fixedly connected with the corresponding shaft sleeves of the front wheel A, the front wheel B and the rear wheel A, and the steering arm d is fixedly connected to the bottom of the shell; the front threaded rod and the rear threaded rod are respectively provided with two adjusting nuts, and the top ends of the front threaded rod and the rear threaded rod are provided with a stop block; one ends of the steering arm a and the steering arm d are hinged to the bottoms of the front threaded rod and the rear threaded rod; one end of the steering rod a is hinged to the top end of the front swing arm, and the other end of the steering rod a is hinged to the top end of the front threaded rod; one end of the steering rod b is hinged to the bottom end of the front threaded rod, and the other end of the steering rod b is hinged to the steering arm b; one end of the steering rod c is hinged to the top end of the rear swing arm, and the other end of the steering rod c is hinged to the top end of the rear threaded rod; one end of the steering rod d is hinged to the bottom end of the rear threaded rod, and the other end of the steering rod d is hinged to the steering arm c.

The utility model has the further improvement that the deflection steering wheel is two symmetrically arranged sections and is in an open concave shape as a whole; the turning device comprises a rotating sleeve, a fixed sleeve and a displacement locking mechanism, two sections of displacement steering wheels are inserted into the inner wall of the rotating sleeve and then fixedly connected into a whole, and the rotating sleeve is rotatably connected to the inner wall of the fixed sleeve; the fixed sleeve comprises a base and a cover plate, and the bottom of the base is fixedly connected with the first steering shaft; the outer wall of the rotating sleeve is provided with a limiting boss along the radial direction, and the inner wall of the fixed sleeve is provided with a limiting groove along the radial direction so as to limit the turning of the deflection steering wheel within a fixed angle range; the shifting locking mechanism comprises a shifting block, a return spring, a slide fastener and a positioning leaf spring; the shifting block is axially and slidably connected with a sliding groove in the cover plate, one part of the shifting block is positioned on the outer side of the cover plate, the other part of the shifting block is positioned on the inner side of the cover plate, and the part positioned on the outer side of the cover plate is in a curved surface shape; a spring seat is fixedly connected to the inner wall of the cover plate, and a return spring is placed between one end of the shifting block and the spring seat; one end of the positioning leaf spring is fixedly connected to the bottom end of the shifting block in the cover plate, and the other end of the positioning leaf spring is fixedly connected with the wedge-shaped slide fastener; two locking holes are formed in the deflection steering wheel, and when the deflection steering wheel is turned to two limit angles, the sliding fastener is clamped into the two locking holes.

The utility model has the advantages that:

first, the utility model discloses a multi-functional electronic shopping cart adopts retractable's frame, can freely switch electric drive mode and hand push mode by the user, has increased the convenience of shopping, all can use in places such as market, supermarket, has extensive application prospect.

Second, the utility model discloses a multi-functional electronic shopping cart, simple structure is understandable, design scientific and reasonable, low in manufacturing cost, maintenance convenience, and easy to operate.

Third, the utility model discloses a multi-functional electronic shopping cart, the elevator wheel is installed to the frame bottom, when addding the driving function, guarantees original upper and lower elevator function.

Fourth, the utility model discloses a multi-functional electric shopping cart shifts and turns around steering wheel accessible turning device to use when satisfying the implementation, driving two kinds of different modes.

Fifth, the multifunctional electric shopping cart of the utility model has a mechanical four-wheel steering mechanism, has stable and reliable structure and is not easy to damage; and the turning radius is small, so that the device is suitable for occasions with small space, such as supermarkets, markets and the like, and the maneuvering performance of the shopping cart during operation is improved.

Sixth, the utility model discloses a multi-functional electric shopping cart, motor, speed reducer, semi-axis adopt coaxial line transmission, are convenient for structural arrangement, guarantee compact structure, the size is less; the power transmission is stable and reliable; the large transmission ratio transmission is convenient to realize, and the instantaneous transmission ratio is constant; the bearing capacity is large, and the transmission efficiency is high.

Seventhly, the utility model discloses a multi-functional electric shopping cart, seat frame are the triangle-shaped structure, have guaranteed the steadiness of seat frame, further assurance user's personal safety.

Eighth, the utility model discloses a multi-functional electronic shopping cart, shopping basket below are equipped with the major possession and place the board, and the commodity size parts, and the minor possession commodity can not bury in the major possession commodity, when needing to change the minor possession commodity, conveniently takes out more.

Ninth, the utility model discloses a multi-functional electric shopping cart, braking system adopt the dish to stop, light in weight, simple structure, easy maintenance, low price.

Tenth, the utility model discloses a multi-functional electric shopping cart, the flexible electric putter that adopts the symmetry to set up of frame realizes, considerable labour saving and time saving.

Eleventh, the utility model discloses a four group's running rollers on multi-functional electronic shopping cart, the preceding frame for it is rolling friction to compile sliding friction between preceding frame and the back frame, great reduction frictional resistance, also can prevent the frame noise production when flexible simultaneously.

Twelfth, the utility model discloses a multi-functional electric shopping cart, when the frame stretches out completely, the front end of back frame does not deviate from four running rollers of group, can prevent like this that the back frame from inclining.

Thirteenth, the utility model discloses a multi-functional electric shopping cart, there is the bulb at the both ends of steering column through threaded connection, can adjust the length of steering column as required, and is more convenient during the installation.

Fourteenth the utility model discloses a multi-functional electronic shopping cart, the steering wheel that shifts is two sections that the symmetry set up, and wholly is open-ended character cut in bas-relief, can both guarantee under two kinds of modes that user's both hands are comfortable hold the steering wheel that shifts, can also conveniently shift the assembly between steering wheel and the turning device.

Fifteenth, the utility model discloses a multi-functional electronic shopping cart, when the angle of steering wheel shifts is adjusted, only need stir the shifting block with the hand and make the thread slipping break away from the locking hole can, when the steering wheel that shifts reachs suitable angle, loosen the shifting block after, the shifting block receives spring tension to reset, and the thread slipping falls into in the locking hole to can guarantee the quick adjustment steering wheel that shifts.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention in the push mode.

Fig. 2 is a schematic view of the overall structure of the present invention in the driving mode.

Fig. 3 is a front view of the carriage assembly in the pushing state of the present invention.

Fig. 4 is a front view of the carriage assembly in a driving state of the present invention.

Fig. 5 is a top view of the carriage assembly in the pushing state of the present invention.

Fig. 6 is a top view of the carriage assembly in the driving state of the present invention.

Fig. 7 is a schematic view of the connection structure between the axle sleeve and the axle of the present invention.

Fig. 8 is a front view of the steering system of the present invention.

Fig. 9 is a partially enlarged view of fig. 8.

Fig. 10 is a plan view of the steering system of the present invention.

Fig. 11 is a schematic structural view of a central steering mechanism of the present invention.

Fig. 12 is a schematic structural diagram of the driving system of the present invention.

Fig. 13 is a schematic diagram of the deceleration of the driving system of the present invention.

Fig. 14 is a schematic structural view of the deflection steering wheel and the turnover device of the present invention.

Fig. 15 is a schematic view of the internal structure of the turnover device of the present invention.

Fig. 16 is a schematic structural view of the shifting locking mechanism of the present invention.

Fig. 17 is a schematic view of the structure of the deflection steering wheel of the present invention.

Detailed Description

The invention will be further elucidated with reference to the drawings and the specific embodiments.

Example 1: as shown in fig. 1 to 17, a multifunctional electric shopping cart comprises a frame assembly 1, wheels 2, a shopping basket 120, a driving system 3, a steering system 4 and a braking system 5; the frame assembly 1 comprises a front frame 101 and a rear frame 102; the rear frame 102 is inserted into the front frame 101, a telescopic device is arranged between the front frame 101 and the rear frame 102, the rear end of the rear frame 102 is welded with a seat frame 103, and the seat frame 103 is rotatably connected with a foldable seat; a pedal plate 104 and an inclined supporting frame 105 are arranged above the rear end of the front frame 101, and the shopping basket 120 is connected to the supporting frame 105; the wheels 2 are used for supporting the frame assembly 1, the front wheels A201 and the front wheels B202 are hinged to the front frame 101, the rear wheels A203 are hinged to the rear frame 102, the rear wheels B204 are rotatably connected to the rear frame 102 through steering knuckles 408, and the elevator wheels 205 are fixedly connected to the bottom of the front frame 101; the driving system 3 comprises a speed reducer, a motor 301, a controller 302, a power supply 303, a foot-operated speed regulator 304 and a switch assembly 6 which are connected through leads; the controller 302, the power supply 303 and the foot-operated speed regulator 304 are arranged on the front frame 101, the motor 301 is in driving connection with a speed reducer, the speed reducer is fixedly connected to the rear frame 102, and the power output end of the speed reducer is in driving connection with the rear wheel B204; the steering system 4 comprises a first steering shaft 401 rotatably connected to the support frame 105, the top end of the first steering shaft 401 is connected with a deflection steering wheel 402 through a turning device 7, the first steering shaft 401 is connected to a second steering shaft 403 in a transmission manner, the second steering shaft 403 is connected to a central steering mechanism 8 in a transmission manner, the central steering mechanism 8 is arranged on the frame assembly 1, two ends of the central steering mechanism 8 output a front wheel steering shaft 404 and a rear wheel steering shaft assembly 405, the front wheel steering shaft 404 and the rear wheel steering shaft assembly 405 are respectively connected to the front frame 101 and the rear frame 102 in a rotation manner, a front swing arm 406 and a rear swing arm 407 are respectively welded to the ends of the front wheel steering shaft 404 and the rear wheel steering shaft assembly 405, the front swing arm 406 pushes or pulls the front wheel a201, the front wheel a201 pushes or pulls the front wheel B202, the rear swing arm 407 pushes or pulls the rear wheel B204, and the rear wheel B204 pushes or pulls the rear wheel a 203; the brake system 5 comprises a brake pedal 501, a brake pump assembly 502, a brake disc 503 and a caliper 504; the brake pedal 501 is hinged to the front frame 101, the brake pump assembly 502 is fixedly connected to the front frame 101, and the bottom of the brake pedal 501 is hinged to the brake pump assembly 502; the brake disc 503 and the caliper 504 are fixedly connected to the knuckle 408, the brake disc 503 passes through the gap of the caliper 504, and the brake pump assembly 502 is connected to the caliper 504 through an oil pipe.

The side surface of the seat frame 103 is triangular, the bottom of a seat cushion 121 of the seat is fixedly connected with a limiting rod 106 through a bolt, and a seat back 122 is rotatably connected to the seat cushion 121 so as to be folded and unfolded conveniently; the limiting rod 106 is connected with the seat frame 103 through a hinge, and when the limiting rod 106 is turned backwards to the limit position, the seat cushion 121 is in a horizontal state; two sides of the rear end of the front frame 101 are welded with a first cross bar 107, and two elevator wheels 205 are fixedly connected to the bottom of the first cross bar 107 through threads; the support frame 105 is U-shaped, two ends of the support frame 105 are welded to the first cross bar 107 in an inclined manner towards the rear end, the top of the support frame 105 is fixedly connected with a control panel 108 through bolts, and the switch assembly 6 comprises a start-stop switch 601, a forward switch 602 and a backward switch (not shown in the figure), and is embedded on the control panel 108; four L-shaped plates 109 are welded on the front frame 101 to form an accommodating cavity, and a power supply 303 is placed in the accommodating cavity.

A large placing plate 110 is arranged on the front frame 101 below the shopping basket 120; the front end and the rear end of the large placing plate 110 are connected with the bracket 118 welded on the front frame 101 through bolts, the rear end and the two sides of the large placing plate 110 are both provided with the baffle plates 111, the power supply 303 is positioned below the large placing plate 110, and the controller 302 is fixedly connected with the bottom of the large placing plate 110 through bolts; a second cross rod 112 is welded on the inner side of the front frame 101, a third cross rod 113 is welded on the inner side of the rear frame 102, the telescopic devices are two electric push rods 114 which are symmetrically arranged, and two ends of each electric push rod 114 are respectively installed between the second cross rod 112 and the third cross rod 113 through bolts; the switch assembly 6 further comprises a frame adjusting switch 604 fixedly connected to the top end of the support frame 105 through a bolt, and the electric push rod 114 and the frame adjusting switch 604 are connected with the power supply 303 through wires.

The rear end of the front frame 101 is also provided with four groups of rollers 115, each group of rollers 115 is two rollers arranged up and down, the central shaft of each roller 115 is fixedly connected to the front frame 101 through a bearing seat, and part of each roller 115 penetrates through a notch 116 to extend into the front frame 101 and contact with the outer wall of the rear frame 102; when the rear frame 102 is fully extended, the front end of the rear frame 102 does not separate from the four sets of rollers 115.

The two sides of the front end of the front frame 101 and one side of the rear end of the rear frame 102 are respectively welded with an ear plate group 117, a shaft sleeve 206 is rotatably connected to the ear plate groups 117 through a pivot, a wheel shaft 207 is vertically welded on the outer wall of the shaft sleeve 206, an external thread is arranged at the end part of the wheel shaft 207, and a front wheel A201, a front wheel B202 and a rear wheel A203 are all arranged on the wheel shaft 207 through bearings; the knuckle 408 comprises a housing 4081, a spherical support 4082, an inner half shaft 4083 and an outer half shaft 4084, the spherical support 4082 is fixedly connected to the bracket 118, and the upper and lower ends of the housing 4081 are connected with the spherical support 4082 through a pin; the inner half shaft 4083 is rotatably connected to an inner sleeve at one end of the spherical support 4082, the outer half shaft 4084 is rotatably connected to an outer sleeve at one end of the housing 4081, the inner half shaft 4083 is connected to the outer half shaft 4084 through a first universal joint (which is located inside the spherical support 4082 and the housing 4081, not shown in the figure), the inner half shaft 4083 is fixedly connected to the speed reducer, and the rear wheel B204 is directly mounted on the outer half shaft 4084; it is noted that during travel, front wheels a201, front wheels B202, and rear wheels a203 rotate with the bearings, axle 207 is stationary, and rear wheels B204 rotate with outer half shafts 4084.

The speed reducer is a planetary gear speed reducer 9, and a gear ring of the planetary gear speed reducer 9 passes through a screwThe bolt is fixedly connected on the rear frame 102, the motor 301 is connected with an input shaft 901 through spline driving, the input shaft 901 is fixedly connected with a sun gear 902, a planet carrier 904 is rotationally connected with a planet gear 903, an output shaft 905 fixed on the planet carrier 904 is connected with an inner half shaft 4083 through a spline, and the reduction ratio is

(ii) a The foot pedal governor 304 is pinned to the right side of the front frame 101, and the foot pedal governor 304 is exposed above the foot pedal 104.

In the embodiment, the power supply 303 selects a 48v, 18ah lithium battery pack; the motor 301 is a brushless direct current motor, and the main technical parameters are as follows: the voltage is 48V, the rated power is 500W, and the rated rotating speed is 3000 r/min; a PIC16F72 single chip microcomputer is selected as a controller 302 circuit.

The brake pedal 501 is connected to a vertical rod 119 on the left side of the front frame 101 through a pin shaft, the vertical rod 119 is welded on the front frame 101, the brake pedal 501 is exposed above the pedal plate 104, and the brake pump assembly 502 is obliquely and fixedly connected to the side part of the vertical rod 119; the outer half shaft 4084 is welded with a flange 505, the brake disc 503 is fixedly connected to the flange 505 by bolts, the caliper 504 is fixedly connected to the support plate 506 by bolts, and the support plate 506 is fixedly connected to the housing 4081 by bolts.

The first steering shaft 401 is connected with the second steering shaft 403 through a second universal joint 409; the central steering mechanism 8 comprises a frame 801 and three bevel gears 802, the three bevel gears 802 are arranged in the frame 801 in an inverted T-shaped meshed manner, the frame 801 is fixedly connected to the front frame 101 through a supporting plate 803, the second steering shaft 403 is rotatably connected to the frame 801 through a bearing and fixedly connected to the bevel gear 802 at the top end through an inner hexagonal countersunk head screw, and the front wheel steering shaft 404 is rotatably connected to the frame 801 through a bearing and fixedly connected to the bevel gear 802 at the front end through an inner hexagonal countersunk head screw; the rear wheel steering shaft assembly 405 comprises a spline shaft 4051 and a spline housing 4052 which are connected in a sliding manner, the spline shaft 4051 is rotatably connected to the frame 801 through a bearing and fixedly connected to the bevel gear 802 at the rear end through an inner hexagonal countersunk head screw, the rear swing arm 407 is welded to the spline housing 4052, a thrust bearing 410 is sleeved on the outer wall of the spline housing 4052, the thrust bearing 410 is in interference fit with the spline housing 4052, and the thrust bearing 410 is welded to the rear frame 102 through a fourth cross bar 411, so that the spline housing 4052 can be guaranteed to move along with the rear frame 102, and the spline housing 4052 can be guaranteed to rotate along with the spline shaft 4051; and the front wheel steering shaft 404 is mounted on the fifth cross bar 123 of the front frame 101 through a bearing seat, then penetrates through the front end of the front frame 101, and is mounted on the front frame 101 through another bearing seat.

The steering system 4 further comprises a steering arm a412, a steering arm b413, a steering arm c414, a steering arm d415, a front threaded rod 416, a rear threaded rod 417, a steering rod a421, a steering rod b422, a steering rod c423 and a steering rod d424, wherein ball heads are screwed at two ends of the steering rod a421, the steering rod b422, the steering rod c423 and the steering rod d424, and a locking nut 418 is arranged at the joint of the ball heads and the steering rod; the steering arm a412, the steering arm B413 and the steering arm c414 are respectively welded with the bushings 206 corresponding to the front wheel a201, the front wheel B202 and the rear wheel a203, and the steering arm d415 is fixed or welded at the bottom of the shell 4081 through bolts; the front threaded rod 416 and the rear threaded rod 417 are respectively provided with two adjusting nuts 419, and the top ends of the front threaded rod 416 and the rear threaded rod 417 are welded or connected with a stop dog 420 through threads; one ends of the steering arms a412 and d415 are hinged to the bottoms of the front threaded rod 416 and the rear threaded rod 417; one end of the steering rod a421 is hinged to the top end of the front swing arm 406, and the other end is hinged to the top end of the front threaded rod 416; one end of the steering rod b422 is hinged to the bottom end of the front threaded rod 416, and the other end of the steering rod b422 is hinged to the steering arm b 413; one end of the steering rod c423 is hinged to the top end of the rear swing arm 407, and the other end of the steering rod c423 is hinged to the top end of the rear threaded rod 417; the steering rod d424 is hinged at one end to the bottom end of the rear threaded rod 417 and at the other end to the steering arm c 414.

The deflection steering wheel 402 is two symmetrically arranged sections and is in a concave shape with an opening as a whole; the turning device 7 comprises a rotating sleeve 701, a fixed sleeve 702 and a displacement locking mechanism 703, two sections of displacement steering wheels 402 are spliced on the inner wall of the rotating sleeve 701 and then are bonded or fixedly connected into a whole through screws, and the rotating sleeve 701 is rotatably connected to the inner wall of the fixed sleeve 702; the fixing sleeve 702 comprises a base 7021 and a cover 7022, and the bottom of the base 7021 is fixedly connected to the first steering shaft 401; the outer wall of the rotating sleeve 701 is provided with a limiting boss (not shown in the figure) along the radial direction, and the inner wall of the fixed sleeve 702 is provided with a limiting groove (not shown in the figure) along the radial direction so as to limit the turning of the deflection steering wheel 402 within a fixed angle range; the shift locking mechanism 703 comprises a shifting block 7031, a return spring 7032, a slide fastener 7033 and a positioning leaf spring 7034; the shifting block 7031 is axially connected to a sliding groove on the cover plate 7022 in a sliding manner, part of the shifting block 7031 is positioned on the outer side of the cover plate 7022, the other part of the shifting block 7031 is positioned on the inner side of the cover plate 7022, and the part positioned on the outer side of the cover plate 7022 is in a curved surface shape; a spring seat is fixedly connected to the inner wall of the cover plate 7022, and a return spring 7032 is arranged between one end of the shifting block 7031 and the spring seat; one end of the positioning leaf spring 7034 is welded or fixedly connected to the bottom end of a shifting block 7031 in the cover plate 7022 through a screw, and the other end of the positioning leaf spring 7034 is fixedly connected with a wedge-shaped sliding buckle 7033; two locking holes 704 are formed in the deflection steering wheel 402, and when the deflection steering wheel 402 is turned over to two limit angles, the sliding buckle 7033 is clamped into the two locking holes 704; in this embodiment, the index steering wheel 402 is turned through an angle in the range of-10 to 110.

The specific working principle is as follows:

in the pushing mode, the electric push rod 114 retracts, the spline shaft 4051 is inserted into the spline housing 4052, the seat turns forwards along the hinge, the seat cushion and the seat back 122 of the seat naturally droop under the action of self gravity in a folded state, the deflection steering wheel turns backwards, and a user pushes the whole shopping cart through the deflection steering wheel.

In the driving mode, firstly, the electric push rod 114 is controlled to extend out through the frame adjusting switch 604, and the rear frame 102 moves backwards by about 30 cm; the seat is turned backwards, so that the limiting rod 106 is in contact with the seat frame 103, the cushion is in a horizontal state, and the seat back 122 is unfolded; when the push mode is switched to the driving mode, the shifting block 7031 is shifted to the right, the reset spring 7032 is compressed to enable the sliding buckle 7033 to slide out of one locking hole 704, at the moment, the positioning leaf spring 7034 deforms upwards, the shifting steering wheel 402 and the rotating sleeve 701 are turned upwards to a limit position (about 120 degrees), the limit boss is just limited by a limit groove in the fixed sleeve 702, the shifting block 7031 is loosened, the shifting block 7031, the positioning leaf spring 7034 and the sliding buckle 7033 move leftwards together under the tension of the reset spring 7032, and when the sliding buckle 7033 falls into the other limiting locking hole 704, the positioning leaf spring 7034 compresses the sliding buckle 7033 to form driving mode positioning; when the driving mode is switched to the pushing mode, the above actions are repeated, and the displacement steering wheel 402 is turned to the limit position in the opposite direction; then the start-stop switch 601 is turned on, the whole driving system 3 is powered on, the forward switch 602 is pressed, the motor 301 rotates forward to drive the sun gear 902 to rotate, the sun gear 902 drives the planet gear 903 to rotate, the planet carrier 904 rotates along with the planet gear 903, meanwhile, the output shaft 905 on the planet carrier 904 drives the inner half shaft 4083 to rotate, the inner half shaft 4083 drives the outer half shaft 4084 to rotate, meanwhile, the rear wheel B204 rotates along with the outer half shaft 4084, and the whole shopping cart runs forward; when the shopping cart needs to retreat, the shopping cart is switched to a retreat switch; when the vehicle is stopped, the brake pedal 501 is depressed, and the brake pads of the caliper 504 engage with the brake disc 503, so that the rear wheel B204 stops rotating.

When the electric push rod 114 pushes the rear frame 102 to extend, the fourth cross bar 411 also drives the spline housing 4052 and then the frame 102 to move backwards; when the shopping cart needs to turn, taking left turn as an example, a user turns the displacement steering wheel 402 to the left, through the gear transmission of the central steering mechanism 8, the front wheel steering shaft 404 rotates to the left to enable the front swing arm 406 to push the steering rod a421, the steering rod a421 pushes the front wheel A201 to turn to the left, and the steering arm a412 pulls the steering rod B422 to enable the front wheel B202 to turn to the left synchronously while the front wheel A201 turns to the left; at the same time, the rear wheel steering shaft assembly 405 rotates to the right so that the front swing arm 406 pushes the steering rod c423, the steering rod c423 pushes the housing 4081, the housing 4081 rotates along the pin shaft connected with the spherical support 4082 to rotate the rear wheel B204 to the right, and when the rear wheel B204 rotates to the right, the steering arm d415 pulls the steering rod d424 to rotate the rear wheel a203 to the right synchronously, so that the shopping cart can be steered.

When going up and down the elevator, the elevator wheels 205 of the shopping cart just can be embedded into the slots of the elevator transfer plate, and the friction generated is enough to fix the shopping cart.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A multi-functional electric shopping cart which characterized in that: comprises a frame component (1), wheels (2), a shopping basket (120), a driving system (3), a steering system (4) and a braking system (5);

the frame assembly (1) comprises a front frame (101) and a rear frame (102); the rear frame (102) is inserted into the front frame (101), a telescopic device is arranged between the front frame (101) and the rear frame (102), a seat frame (103) is arranged at the rear end of the rear frame (102), and a foldable seat is rotatably connected to the seat frame (103); a pedal plate (104) and an inclined supporting frame (105) are arranged above the rear end of the front frame (101), and the shopping basket (120) is connected to the supporting frame (105);

the elevator car is characterized in that the wheels (2) are used for supporting the car frame assembly (1), the front wheels A (201) and the front wheels B (202) are hinged to the front car frame (101), the rear wheels A (203) are hinged to the rear car frame (102), the rear wheels B (204) are rotatably connected to the rear car frame (102) through steering knuckles (408), and the elevator wheels (205) are fixedly connected to the bottom of the front car frame (101);

the driving system (3) comprises a speed reducer, a motor (301), a controller (302), a power supply (303), a foot-operated speed regulator (304) and a switch assembly (6), wherein the motor, the controller (302), the power supply (303), the foot-operated speed regulator and the switch assembly are connected through wires; the controller (302), the power supply (303) and the foot stepping speed regulator (304) are arranged on the front frame (101), the motor (301) is connected with the speed reducer in a driving way, the speed reducer is fixedly connected on the rear frame (102) and the power output end of the speed reducer is connected with the rear wheel B (204) in a driving way;

the steering system (4) comprises a first steering shaft (401) rotatably connected to the support frame (105), the top end of the first steering shaft (401) is connected with a deflection steering wheel (402) through a turnover device (7), the first steering shaft (401) is in transmission connection with a second steering shaft (403), the second steering shaft (403) is in transmission connection with a central steering mechanism (8), the central steering mechanism (8) is arranged on the frame assembly (1), two ends of the central steering mechanism (8) output a front wheel steering shaft (404) and a rear wheel steering shaft assembly (405), the front wheel steering shaft (404) and the rear wheel steering shaft assembly (405) are respectively in rotation connection with the front frame (101) and the rear frame (102), the end parts of the front wheel steering shaft (404) and the rear wheel steering shaft assembly (405) are respectively provided with a front swing arm (406) and a rear swing arm (407), the front swing arm (406) pushes or pulls the front wheel A (201), the front wheel A (201) pushes or pulls the front wheel B (202), meanwhile, the rear swing arm (407) pushes or pulls the rear wheel B (204), and the rear wheel B (204) pushes or pulls the rear wheel A (203);

the brake system (5) comprises a brake pedal (501), a brake pump assembly (502), a brake disc (503) and calipers (504); the brake pedal (501) is hinged to the front frame (101), the brake pump assembly (502) is fixedly connected to the front frame (101), and the bottom of the brake pedal (501) is hinged to the brake pump assembly (502); the brake disc (503) and the caliper (504) are fixedly connected to the steering knuckle (408), the brake disc (503) penetrates through the gap of the caliper (504), and the brake pump assembly (502) is connected with the caliper (504) through an oil pipe.

2. The multifunctional electric shopping cart as claimed in claim 1, wherein: the side surface of the seat frame (103) is triangular, the bottom of a seat cushion (121) of the seat is fixedly connected with a limiting rod (106), and a seat back (122) is rotatably connected to the seat cushion (121); the limiting rod (106) is connected with the seat frame (103) through a hinge, and when the limiting rod (106) is turned backwards to the limit position, the seat cushion (121) is in a horizontal state; two sides of the rear end of the front frame (101) are fixedly connected with a first cross rod (107), and two elevator wheels (205) are fixedly connected to the bottom of the first cross rod (107); the supporting frame (105) is U-shaped, two ends of the supporting frame (105) are obliquely and fixedly connected to the first cross rod (107), the top of the supporting frame (105) is fixedly connected with a control panel (108), and the switch assembly (6) comprises a start-stop switch (601), a forward switch (602) and a backward switch, and is fixedly connected to the control panel (108); four L-shaped plates (109) are fixedly connected to the front frame (101) to form an accommodating cavity, and a power supply (303) is placed in the accommodating cavity.

3. The multifunctional electric shopping cart as claimed in claim 2, wherein: a large placing plate (110) is arranged on the front frame (101) below the shopping basket (120); the front end and the rear end of the large placing plate (110) are connected with the front frame (101) through a support (118), the rear end and two sides of the large placing plate (110) are fixedly connected with baffles (111), a power supply (303) is positioned below the large placing plate (110), and a controller (302) is fixedly connected with the bottom of the large placing plate (110); a second cross rod (112) is fixedly connected to the inner side of the front frame (101), a third cross rod (113) is fixedly connected to the inner side of the rear frame (102), the telescopic devices are two electric push rods (114) which are symmetrically arranged, and two ends of each electric push rod (114) are hinged to the second cross rod (112) and the third cross rod (113) respectively; the switch component (6) further comprises a frame adjusting switch (604) fixedly connected to the top end of the support frame (105), and the electric push rod (114) and the frame adjusting switch (604) are connected with the power supply (303) through leads.

4. A multifunctional electric shopping cart as claimed in claim 3, wherein: the rear end of the front frame (101) is also provided with four groups of rollers (115), each group of rollers (115) is vertically arranged, the central shaft of each roller (115) is fixedly connected to the front frame (101) through a bearing seat, and part of each roller (115) penetrates through the notch (116) and extends into the front frame (101) and is contacted with the outer wall of the rear frame (102); when the rear frame (102) is completely extended, the front end of the rear frame (102) does not depart from the four groups of rollers (115).

5. The multifunctional electric shopping cart as claimed in claim 4, wherein: both sides of the front end of the front frame (101) and one side of the rear end of the rear frame (102) are fixedly connected with lug plate groups (117), a shaft sleeve (206) is connected to the lug plate groups (117) through a pivot in a rotating mode, a wheel shaft (207) is vertically and fixedly connected to the outer wall of the shaft sleeve (206), and a front wheel A (201), a front wheel B (202) and a rear wheel A (203) are fixedly connected to the wheel shaft (207); the steering knuckle (408) comprises a shell (4081), a spherical support (4082), an inner half shaft (4083) and an outer half shaft (4084), the spherical support (4082) is fixedly connected to the bracket (118), and the shell (4081) is connected with the spherical support (4082) through a pin shaft; the inner half shaft (4083) is rotatably connected to an inner sleeve at one end of the spherical support (4082), the outer half shaft (4084) is rotatably connected to an outer sleeve at one end of the shell (4081), the inner half shaft (4083) is connected with the outer half shaft (4084) through a first universal joint, the inner half shaft (4083) is fixedly connected to the speed reducer, and the rear wheel B (204) is fixedly connected to the outer half shaft (4084).

6. The multifunctional electric shopping cart as claimed in claim 5, wherein: the speed reducer is a planetary gear speed reducer (9), a motor (301) is in driving connection with an input shaft (901) through a spline, the input shaft (901) is fixedly connected with a sun gear (902), and an output shaft (905) fixed on a planet carrier (904) is connected with an inner half shaft (4083) through a spline; the foot pedal speed regulator (304) is pinned to the right side of the front frame (101), and the foot pedal speed regulator (304) is exposed above the pedal platform plate (104).

7. The multifunctional electric shopping cart as claimed in claim 5, wherein: the brake pedal (501) is connected to a vertical rod (119) on the left side of the front frame (101) through a pin shaft, the brake pedal (501) is exposed above the pedal table plate (104), and the brake pump assembly (502) is obliquely and fixedly connected to the side portion of the vertical rod (119); the outer half shaft (4084) is fixedly connected with a flange plate (505), the brake disc (503) is fixedly connected to the flange plate (505), the caliper (504) is fixedly connected to the support plate (506), and the support plate (506) is fixedly connected to the shell (4081).

8. The multifunctional electric shopping cart as claimed in claim 7, wherein: the first steering shaft (401) is connected with the second steering shaft (403) through a second universal joint (409); the central steering mechanism (8) comprises a frame (801) and three bevel gears (802), the three bevel gears (802) are arranged in the frame (801) in an inverted T-shaped meshed manner, the frame (801) is fixedly connected to the front frame (101) through a supporting plate (803), a second steering shaft (403) is rotatably connected to the frame (801) and fixedly connected to the bevel gear (802) at the top end, and a front wheel steering shaft (404) is rotatably connected to the frame (801) and fixedly connected to the bevel gear (802) at the front end; rear wheel steering shaft subassembly (405) including sliding connection's integral key shaft (4051) and spline housing (4052), integral key shaft (4051) rotate to be connected in frame (801) and fixed connection in bevel gear (802) of rear end, back swing arm (407) fixed connection is on spline housing (4052), the cover is equipped with thrust bearing (410) on the outer wall of spline housing (4052), and thrust bearing (410) are through fourth horizontal pole (411) and rear frame (102) fixed connection.

9. The multifunctional electric shopping cart as claimed in claim 8, wherein: the steering system (4) further comprises a steering arm a (412), a steering arm b (413), a steering arm c (414), a steering arm d (415), a front threaded rod (416), a rear threaded rod (417), a steering rod a (421), a steering rod b (422), a steering rod c (423) and a steering rod d (424), wherein ball heads are connected to two ends of the steering rod a (421), and a locking nut (418) is arranged at the joint of the ball heads and the steering rod; the steering arm a (412), the steering arm B (413) and the steering arm c (414) are fixedly connected with the shaft sleeves (206) corresponding to the front wheel A (201), the front wheel B (202) and the rear wheel A (203) respectively, and the steering arm d (415) is fixedly connected to the bottom of the shell (4081); the front threaded rod (416) and the rear threaded rod (417) are respectively provided with two adjusting nuts (419), and the top ends of the front threaded rod (416) and the rear threaded rod (417) are provided with a stop block (420); one ends of the steering arm a (412) and the steering arm d (415) are hinged to the bottoms of the front threaded rod (416) and the rear threaded rod (417); one end of the steering rod a (421) is hinged to the top end of the front swing arm (406), and the other end of the steering rod a is hinged to the top end of the front threaded rod (416); one end of the steering rod b (422) is hinged to the bottom end of the front threaded rod (416), and the other end of the steering rod b (422) is hinged to the steering arm b (413); one end of the steering rod c (423) is hinged to the top end of the rear swing arm (407), and the other end of the steering rod c (423) is hinged to the top end of the rear threaded rod (417); one end of the steering rod d (424) is hinged to the bottom end of the rear threaded rod (417), and the other end of the steering rod d is hinged to the steering arm c (414).

10. A multifunctional electric shopping cart as claimed in any one of claims 1 to 9, wherein: the deflection steering wheel (402) is two symmetrically arranged sections and is in a concave shape with an opening as a whole; the turnover device (7) comprises a rotating sleeve (701), a fixed sleeve (702) and a displacement locking mechanism (703), two sections of displacement steering wheels (402) are inserted into the inner wall of the rotating sleeve (701) and then fixedly connected into a whole, and the rotating sleeve (701) is rotatably connected to the inner wall of the fixed sleeve (702); the fixed sleeve (702) comprises a base (7021) and a cover plate (7022), and the bottom of the base (7021) is fixedly connected to the first steering shaft (401); the outer wall of the rotating sleeve (701) is provided with a limiting boss along the radial direction, and the inner wall of the fixed sleeve (702) is provided with a limiting groove along the radial direction so as to limit the turning of the deflection steering wheel (402) within a fixed angle range; the deflection locking mechanism (703) comprises a shifting block (7031), a return spring (7032), a slide fastener (7033) and a positioning leaf spring (7034); the shifting block (7031) is axially connected to a sliding groove in the cover plate (7022) in a sliding manner, part of the shifting block (7031) is located on the outer side of the cover plate (7022), the other part of the shifting block is located on the inner side of the cover plate (7022), and the part located on the outer side of the cover plate (7022) is in a curved surface shape; a spring seat is fixedly connected to the inner wall of the cover plate (7022), and a return spring (7032) is placed between one end of the shifting block (7031) and the spring seat; one end of the positioning leaf spring (7034) is fixedly connected to the bottom end of a shifting block (7031) in the cover plate (7022), and the other end of the positioning leaf spring is fixedly connected with a wedge-shaped sliding buckle (7033); two locking holes (704) are formed in the deflection steering wheel (402), and when the deflection steering wheel (402) is turned over to two limit angles, the sliding fastener (7033) is clamped into the two locking holes (704).