CN210063047U

CN210063047U - Multifunctional shopping cart

Info

Publication number: CN210063047U
Application number: CN201920748639.6U
Authority: CN
Inventors: 崔泽强; 任明; 胡世民; 励晨露; 张保; 王志斌
Original assignee: Wenzhou University
Current assignee: Wenzhou University
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-02-14
Anticipated expiration: 2029-05-23

Abstract

The utility model discloses a multifunctional shopping cart, which comprises a cart main body, universal wheels at the front side of the bottom of the cart main body and idler wheels at the rear side of the bottom, wherein the cart main body is provided with a hinged cart fence, and a support frame for placing articles and a folding guide device for folding the support frame and the cart fence are arranged in the cart fence; a crawler climbing device and a crawler angle adjusting device for adjusting the angle of the crawler climbing device are arranged on the rear side of the cart main body; the lower end of the rear side of the cart main body is provided with a gear shifting device and a motor connected with an input shaft in the gear shifting device; an output shaft in the gear shifting device is connected with the roller, an output shaft is connected with the crawler climbing device, and an output shaft is connected with the supporting frame lifting device; the supporting frame lifting device is connected with the supporting frame. The utility model has the characteristics of structural design is novel, the function is various, can alleviate the tired degree of old person's shopping trip by a wide margin.

Description

Multifunctional shopping cart

Technical Field

The invention relates to the technical field of household shopping carts, in particular to a multifunctional shopping cart.

Background

The Chinese society has rapidly become aging, and with the increase of age, the life quality of the old is affected by the decline of physical functions, and the inconvenience of shopping and going out is particularly obvious. The household shopping cart has the function of storing and transporting articles, reduces the gravity burden of a user and assists the life of the user. The use of the shopping cart for the old: from home, walk from a district or take public transport means to a nearby supermarket or vegetable market, and return to home from the original way after shopping. Generally, the old people need to pull the shopping cart to climb stairs by going through steps and slopes on the way, and the physical strength is consumed. Analyzing the behavior and actions of the old: the old people can slow down the movement and shrink muscles due to physical reduction, and bear the weight of the shopping cart and purchased articles for a long time, so that the body is tired, and the experience feeling of using the shopping cart is very poor. The shopping cart for the old people in the market is single in form and lack of functions. And the defects that the labor is needed to pull the belt when the belt goes up a slope, heavy objects are taken and placed by frequently bending the belt, the object placing capability is poor and the like exist. When going upstairs and downstairs, the special triangular wheel is still laborious to use, and the wheel loss is large. Even some old people shopping carts with strong functionality are not thorough in consideration of matching of functions and structures.

Disclosure of Invention

The invention aims to provide a multifunctional shopping cart. The shopping trolley has the characteristics of novel structural design and multiple functions, and can greatly reduce the fatigue degree of shopping and traveling of the old.

The technical scheme of the invention is as follows: a multifunctional shopping cart comprises a cart main body, universal wheels on the front side of the bottom of the cart main body and idler wheels on the rear side of the bottom, wherein a cart fence is hinged to the cart main body, and a support frame for placing articles and a folding guide device for folding the support frame and the cart fence are arranged in the cart fence; a crawler climbing device and a crawler angle adjusting device for adjusting the angle of the crawler climbing device are arranged on the rear side of the cart main body; the lower end of the rear side of the cart main body is provided with a gear shifting device and a motor connected with an input shaft in the gear shifting device; an output shaft in the gear shifting device is connected with the roller, an output shaft is connected with the crawler climbing device, and an output shaft is connected with the supporting frame lifting device; the supporting frame lifting device is connected with the supporting frame.

In the multifunctional shopping cart, the folding guide device comprises two front rails vertically fixed on the front side of the cart fence and a rear rail fixed on the rear side of the cart fence; the front gear and the rear gear are both provided with a guide rail device; the support frame consists of a first support frame, a vertical frame and a second support frame which are combined into a ladder shape, the first support frame is hinged with the vertical frame, and the vertical frame is fixedly connected with the second support frame; the first support frame comprises a plurality of first support frame vertical rods and a plurality of first support frame cross rods; the vertical frame comprises a plurality of vertical frame vertical rods and a plurality of vertical frame cross rods; the second support frame comprises a plurality of second support frame vertical rods and a plurality of second support frame cross rods; a plurality of arc grooves with 90 degrees are arranged between the first supporting frame and the vertical frame; the arc groove is fixedly connected with the first support frame cross rod, and the vertical frame cross rod can slide in the arc groove; the guide rail device on the front rail is connected with the corresponding first strut vertical rod; and the guide rail device on the rear rail is connected with the corresponding second support frame vertical rod.

In the multifunctional shopping cart, the guide rail device comprises a slide rail shell, a slide rail groove is arranged in the slide rail shell, and a slide rail and a slide groove ball matched with the slide rail are arranged in the slide rail groove; the sliding rail is fixedly connected with the first support frame vertical rod or the second support frame vertical rod.

In the multifunctional shopping cart, the gear shifting device comprises a shifting box body, and a first output shaft, a second output shaft and a third output shaft are arranged in the shifting box body; a crawler gear is arranged in the first output shaft, and the first output shaft is connected with a crawler climbing device; a roller gear is arranged in the second output shaft, and the second output shaft is connected with a roller; the third output shaft is provided with a lifting gear and is connected with a supporting frame lifting device; arc-shaped gear shifting grooves are formed in two side walls of the gear shifting box body, a slidable gear shifting shaft is arranged in each gear shifting groove, and a gear shifting gear meshed with a crawler gear, a roller gear or a lifting gear is arranged on each gear shifting shaft; the gear shifting shaft is also provided with a first reduction gear; an idler shaft and a motor are further arranged in the gear shifting box body, and a driving gear is arranged at the output end of the motor; the idler shaft is provided with a second gear which is respectively meshed with the first reduction gear and the driving gear; two ends of the gear shifting shaft are respectively connected with a limiting handle, and a gear shifting grip is arranged between the limiting handles; arc double-spring clamping grooves and single-spring clamping grooves are further formed in the side walls of the two sides of the gear shifting box body, and spring balls are arranged in the arc double-spring clamping grooves and the single-spring clamping grooves; and the limiting handle is provided with a limiting groove matched with the spring ball.

The crawler climbing device comprises driving crawler wheels fixed at two ends of the first output shaft, two sides of each driving crawler wheel are respectively connected with a crawler baffle, a driven crawler wheel is arranged between the crawler baffles at two sides of the same driving crawler wheel, and a crawler is arranged between each driven crawler wheel and the driving crawler wheel; and a connecting rod is arranged between the crawler baffles on the driving crawler wheels at the two ends of the first output shaft.

In the multifunctional shopping cart, the track angle adjusting device comprises a short connecting rod fixedly connected with the cart main body, and a ratchet wheel is arranged at the end part of the short connecting rod; the middle part of the connecting rod is hinged with a long connecting rod, and the end part of the long connecting rod is connected with the ratchet wheel.

In the multifunctional shopping cart, the end part of the long connecting rod is also provided with a pawl matched with the ratchet wheel, and the pawl is connected with the pull ring through a spring.

In the multifunctional shopping cart, the support frame lifting device comprises an extension plate fixed at the bottom of the gear shifting box body, a lower slotting rack is arranged on the extension plate, and a lower double-head stepped screw rod is arranged in a notch of the lower slotting rack in a sliding manner; the end part of the lower slotting machine frame is fixedly provided with a lower fixing pin, the fixing pin and the lower double-head stepped screw rod are respectively connected with the lifting frame of the scissor type fork, and the upper end of the lifting frame is respectively connected with an upper double-head stepped screw rod and an upper fixing pin; the support frame is provided with an upper slotting rack; the upper fixing pin is fixedly connected with the end part of the upper slotting machine frame, and the upper double-head stepped screw rod is arranged in a notch of the upper slotting machine frame in a sliding manner; the extension plate is also provided with a lead screw matched with a bearing, the lead screw is provided with a slide block matched with threads, and the slide block is fixedly connected with the lower double-head stepped screw; the end part of the screw rod is provided with a driven bevel gear; a first transmission gear is also fixedly arranged on the third output shaft; and a transmission shaft is arranged on the gear shifting box body, a second transmission gear meshed with the first transmission gear is arranged at one end of the transmission shaft, and a driving bevel gear meshed with the driven bevel gear is arranged at the other end of the transmission shaft.

In the multifunctional shopping cart, the two sides of the extension plate are respectively provided with the reinforcing ribs fixedly connected with the gear shifting box body.

In the multifunctional shopping cart, the front side of the upper end face of the cart fence is provided with the hinged turnover frame, and the turnover frame is erected on the rear side of the upper end face of the cart fence after being turned over.

Compared with the prior art, the trolley main body is provided with the hinged trolley fence, and the support frame is arranged in the fence and used for placing articles; the support frame and the cart fence can be freely folded through the folding guide device, so that the shopping cart can be conveniently stored and placed; the shopping cart is convenient to push through places with step shapes such as going upstairs and downstairs through the crawler climbing device and the crawler angle adjusting device for adjusting the crawler climbing device, the supporting frame for placing articles can be lifted up and down through the supporting frame lifting device, the articles are taken without frequently bending down, and the practical comfort is enhanced; according to the invention, through the gear shifting device, multi-gear switching is carried out, and one gear can provide resistance for the roller wheel when the shopping cart is pushed, so that walking is assisted, and labor is saved; the first gear provides a power source for the crawler climbing device to go up and down steps; the first gear provides lifting power output for the support frame lifting device, so that articles can be conveniently taken; the foldable trolley has the characteristics of novel structural design and multiple functions, the fatigue degree of the old people during shopping trip can be greatly reduced, the shopping life experience feeling is enhanced, in addition, the foldable trolley is further provided with the hinged turnover frame at the front side of the upper end face of the trolley fence, and the turnover frame is erected at the rear side of the upper end face of the trolley fence after being turned over, so that a portable seat can be formed, the old people can sit on the shopping trolley to rest when the old people are pushed to do work, and the foldable trolley is very convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the folding guide of the present invention;

fig. 3 is a schematic view of the structure of the support frame of the folding guide apparatus of the present invention;

FIG. 4 is a schematic view of the track arrangement of the present invention;

FIG. 5 is a schematic view A of the gear shifting device of the present invention;

FIG. 6 is a schematic view B of the gear shifting device of the present invention;

FIG. 7 is a schematic structural view of the check handle and shift grip of the present invention;

FIG. 8 is a schematic illustration of the track climbing device of the present invention;

FIG. 9 is a schematic structural view of the long link of the present invention;

fig. 10 is a schematic structural view of the supporting frame lifting device of the present invention.

The labels in the figures are: 1-a cart body, 2-universal wheels, 3-rollers, 4-a cart rail, 5-a support frame, 6-a folding guide, 7-a track climbing device, 8-a track angle adjustment device, 9-a gear shifting device, 10-a motor, 11-a support frame lifting device, 501-a first support frame, 502-a vertical frame, 503-a second support frame, 504-a first support frame vertical rod, 505-a first support frame cross rod, 506-a vertical frame vertical rod, 507-a vertical frame cross rod, 508-a second support frame vertical rod, 509-a second support frame cross rod, 510-a circular arc groove, 601-a front rail, 602-a rear rail, 603-a guide rail device, 604-a slide rail housing, 605-a slide rail groove, 606-a slide rail, 607-a slide rail ball, 901-shift housing, 902-first output shaft, 903-second output shaft, 701-driving crawler wheel, 702-crawler apron, 703-driven crawler wheel, 704-crawler, 705-connecting rod, 801-short connecting rod, 802-ratchet, 803-long connecting rod, 904-third output shaft, 905-crawler gear, 906-roller gear, 907-lifting gear, 908-shift groove, 909-shift shaft, 910-shift gear, first reduction gear, 912-idler shaft, 913-driving gear, 914-second gear, 915-limit handle, 916-shift grip, 917-circular arc double spring groove, 918-single spring groove, 919-spring ball, 920-limit groove, 1101-extension plate, 1102-lower slotting machine frame, 1103-double-head stepped screw, 1104-lower fixing pin, 1105-lifting frame, 1106-upper double-head stepped screw, 1107-upper fixing pin, 1108-slotting machine frame, 1109-screw rod, 1110-sliding block, 1111-driven bevel gear, 1112-first transmission gear, 1113-transmission shaft, 1114-second transmission gear, 1115-driving bevel gear and 1116-reinforcing rib.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example (b): a multifunctional shopping cart is shown in figure 1 and comprises a cart body 1, universal wheels 2 on the front side of the bottom of the cart body 1 and rolling wheels 3 on the rear side of the bottom, wherein a cart fence 4 is hinged to the cart body 1, and the cart fence 4 can rotate upwards; a support frame 5 for placing articles and a folding guide device 6 for folding the support frame 5 and the trolley fence 4 are arranged in the trolley fence 4; a crawler climbing device 7 and a crawler angle adjusting device 8 for adjusting the angle of the crawler climbing device 7 are arranged on the rear side of the cart main body 1; the lower end of the rear side of the trolley main body 1 is provided with a gear shifting device 9 and a motor 10 connected with an input shaft in the gear shifting device 9; an output shaft in the gear shifting device 9 is connected with the roller 3, an output shaft is connected with the crawler climbing device 7, and an output shaft is connected with the support frame lifting device 11; the support frame lifting device 11 is connected with the support frame 5.

Further, as shown in fig. 2 to 3, the folding guide 6 includes two front rails 601 vertically fixed on the front side of the stroller fence 4 and a rear rail 602 fixed on the rear side of the stroller fence 4; the front rail 601 and the rear rail 602 are both provided with a guide rail device 603, as shown in fig. 4, the guide rail device 603 includes a slide rail housing 604, a slide rail groove 605 is provided in the slide rail housing 604, a slide rail 606 and a sliding groove ball 607 matched with the slide rail 606 are provided in the slide rail groove 605; the slide rail 606 is fixedly connected with the first support frame vertical rod 504 or the second support frame vertical rod 508; the support frame 5 consists of a first support frame 501, a vertical frame 502 and a second support frame 503 which are combined into a ladder shape, the first support frame 501 is hinged with the vertical frame 502, and the vertical frame 502 is fixedly connected with the second support frame 503; the first support frame 501 comprises a plurality of first support frame vertical rods 504 and a plurality of first support frame cross rods 505; the vertical frame 502 comprises a plurality of vertical frame vertical rods 506 and a plurality of vertical frame cross rods 507; the second strut 503 comprises a plurality of second strut vertical rods 508 and a plurality of second strut horizontal rods 509; a plurality of arc grooves 510 with 90 degrees are arranged between the first supporting frame 501 and the vertical frame 502; the arc groove 510 is fixedly connected with the first support frame cross bar 505, and the vertical frame cross bar 507 can slide in the arc groove 510; the guide rail device 603 on the front rail 601 is connected with the corresponding first support frame vertical rod 504; the guide rail device 603 on the back rail 602 is connected with the corresponding second strut vertical rod 508. When the stroller is folded, the stroller fence 4 is lifted, and the stroller fence 4 is folded because the connecting rods of all parts of the stroller fence 4 are rotatably connected with the front rail 601; meanwhile, the first strut vertical bar 504 on the first strut 501 is fixedly connected with the sliding rail 606 in the guide rail device 603, the sliding rail 606 moves upwards in the sliding rail groove 605 due to the effect of the sliding groove ball 607, at the moment, the first strut 501 and the vertical frame 502 are hinged, therefore, the first strut horizontal bar 505 drives the arc groove 510 to rotate, the vertical frame horizontal bar 507 slides in the arc groove 510, thereby folding the support frame 5, finally forming the folding phenomena of the cart fence 4 and the support frame 5, effectively reducing the occupied area of the shopping cart, and having good space utilization rate.

As shown in fig. 5-7, the gear shifting device 9 includes a gear shifting housing 901, and a first output shaft 902, a second output shaft 903 and a third output shaft 904 are disposed in the gear shifting housing 901; a crawler gear 905 is arranged in the first output shaft 902, and the first output shaft 902 is connected with the crawler climbing device 7; a roller gear 906 is arranged in the second output shaft 903, and the second output shaft 903 is connected with a roller 3; the third output shaft 904 is provided with a lifting gear 907, and the third output shaft 904 is connected with the support frame lifting device 11; arc-shaped gear shifting grooves 908 are formed in two side walls of the gear shifting box 901, a slidable gear shifting shaft 909 is arranged in each gear shifting groove 908, and a gear shifting gear 910 meshed with the crawler gear 905, the roller gear 906 or the lifting gear 907 is arranged on each gear shifting shaft 909; the shift shaft 909 is also provided with a first reduction gear 911; an idler shaft 912 and a motor 10 are further arranged in the gear shifting box 901, and a driving gear 913 is arranged at the output end of the motor 10; the idler shaft 912 is provided with a second gear 914 which is respectively engaged with the first reduction gear 911 and the driving gear 913; two ends of the gear shifting shaft 909 are respectively connected with a limiting handle 915, and a gear shifting handle 916 is arranged between the limiting handles 915; arc double-spring clamping grooves 917 and single-spring clamping grooves 918 are further formed in the side walls of the two sides of the gear shifting box 901, and spring balls 919 are arranged in the arc double-spring clamping grooves 917 and the single-spring clamping grooves 918; the limiting handle 915 is provided with a limiting groove 920 matched with the spring ball 919. All the gears are polyformaldehyde super steel gears, the weight is light, the strength is high, the gear shifting box body 901 is manufactured by 3D printing, the precision is high, the weight is light, all the output shafts and the gears are in key connection and are fixed by check rings, corresponding bearings are arranged between all the fixed shafts and the gears, the connection modes are all conventional technical means, and therefore detailed description is omitted.

As shown in fig. 8-9, the track climbing device 7 includes a driving crawler wheel 701 fixed at both ends of a first output shaft 902, two track baffles 702 are respectively connected to both sides of the driving crawler wheel 701, a driven crawler wheel 703 is disposed between the track baffles 702 at both sides of the same driving crawler wheel 701, and a track 704 is disposed between the driven crawler wheel 703 and the driving crawler wheel 701; a connecting rod 705 is arranged between the track baffles 702 on the driving track wheels 701 at two ends of the first output shaft 902.

The crawler angle adjusting device 8 comprises a short connecting rod 801 fixedly connected with the cart main body 1, and a ratchet wheel 802 is arranged at the end part of the short connecting rod 801; the middle part of the connecting rod 705 is hinged with a long connecting rod 803, and the end part of the long connecting rod 803 is connected with the ratchet wheel 802. The end of the long connecting rod 803 is also provided with a pawl 804 matched with the ratchet 802, and the pawl 804 is connected with a pull ring 805 through a spring. The ratchet 802 is connected with the long connecting rod 803 through a key, the pawl 804 is connected with the long connecting rod 803 through a shaft, the pawl 804 is matched with the ratchet 802 through the limiting effect of a shaft sleeve, and a spring is provided above the pawl 804 to be connected with the pull ring 805. In a working state, the spring elasticity compresses the pawl 804, the pawl 804 and the ratchet 802 are clamped and fixed, meanwhile, the short connecting rod 801 and the long connecting rod 803 are limited mutually, and the angle is kept inconvenient; in a contracted state, the pull ring 805 is pulled to lift the pawl 804, so that the ratchet wheel 802 can rotate freely, the short connecting rod 801 and the long connecting rod 803 can rotate, and the angle of the track climbing device 7 is adjusted; when reaching the contraction placing position, the pull ring 805 is loosened, the pawl 804 is released, and the ratchet wheel 802 is locked again; therefore, when steps with other angles are met, the angle of the track climbing device 7 is adjusted by adjusting the clamping position of the ratchet wheel 804 so as to adapt to different step inclination angles.

As shown in fig. 10, the supporting frame lifting device 11 includes an extension plate 1101 fixed at the bottom of the gear shifting box 901, a lower slotting machine 1102 is arranged on the extension plate 1101, and a lower double-head stepped screw 1103 is slidably arranged in a notch of the lower slotting machine 1102; the end part of the lower slotting machine frame 1102 is fixedly provided with a lower fixing pin 1104, the fixing pin 1104 and the lower double-head stepped screw 1103 are respectively connected with a scissor-fork type lifting frame 1105, and the upper end of the lifting frame 1105 is respectively connected with an upper double-head stepped screw 1106 and an upper fixing pin 1107; an upper slotted frame 1108 is arranged on the support frame 5; the upper fixing pin 1107 is fixedly connected with the end of the upper slotted frame 1108, and the upper double-head stepped screw 1106 is slidably arranged in the slot of the upper slotted frame 1108; the extension plate 1101 is also provided with a lead screw 1109 matched with a bearing, the lead screw 1109 is provided with a sliding block 1110 matched with threads, and the sliding block 1110 is fixedly connected with the lower double-thread stepped screw 1103; the end part of the screw rod 1109 is provided with a driven bevel gear 1111; a first transmission gear 1112 is also fixedly arranged on the third output shaft 904; the gear shifting box 901 is provided with a transmission shaft 1113, one end of the transmission shaft 1113 is provided with a second transmission gear 1114 meshed with the first transmission gear 1112, and the other end of the transmission shaft 1113 is provided with a driving bevel gear 1115 meshed with the driven bevel gear 1111.

According to actual requirements, when the gear shifting device is used, the gear shifting handle 615 is controlled by the gear shifting grip 916 to drive the position of the gear shifting shaft 909 in the gear shifting groove 908, so that the gear shifting gear on the gear shifting shaft 909 is meshed with the track gear 905 on the first output shaft 902, the roller gear 906 on the second output shaft 903 or the lifting gear 907 on the third output shaft 904, and the rotation speed of the rollers, the running speed of the track and the lifting motion of the lifting frame are respectively controlled.

The crawler belt runs: the limiting handle 615 presses the gear shift shaft 909 downwards at the lowest position of the gear shift groove 908, the gear shift gear 910 is engaged with the track gear 905, at this time, the limiting groove 920 on the limiting handle 615 is matched with the spring ball 919 on the single spring clamping groove 918 for limiting, the rotation power of the motor 10 is transmitted to the gear shift gear 910 through the driving gear 913, the second gear 914 and the first reduction gear 911, and the gear shift gear 910 is engaged with the track gear 905 to drive the first output shaft 902 to rotate, so that the climbing power is provided for the track climbing device 7.

The roller wheel operates: the limiting handle 615 presses the gear shift shaft 909 upwards at the middle position of the gear shift groove 908, the gear shift gear 910 is engaged with the roller gear 906, at this time, the limiting groove 920 on the limiting handle 615 is matched with the spring ball 919 at the upper part to limit the relative position on the arc double-spring clamping groove 917, the rotation power of the motor 10 is transmitted to the gear shift gear 910 through the driving gear 913, the second gear 914 and the first reduction gear 911, the gear shift gear 910 is engaged with the roller gear 906 to drive the second output shaft 903 to rotate, and therefore the rolling power is provided for the roller 3.

The support frame is lifted and moved: the limiting handle 615 presses the gear shift shaft 909 upwards to the top of the gear shift groove 908, the gear shift gear 910 is engaged with the lifting gear, at this time, the limiting groove 920 on the limiting handle is matched with the spring ball 919 at the lower part of the relative position on the circular arc double spring clamping groove 917 for limiting, the rotary power driving gear 913, the second gear 914 and the first reduction gear 911 of the motor 10 are transmitted to the gear shift gear 910, the gear shift gear 910 is engaged with the roller gear 906 to drive the third output shaft 904 to rotate, the first transmission gear 1112 on the third output shaft 903 rotates at the same time to drive the second transmission gear 1114 engaged with the first transmission gear 1112 to rotate, a transmission shaft 1113 fixedly connected with the second transmission gear 1114 rotates, a driving bevel gear 1115 at the other end of the transmission shaft 1113 drives a driven bevel gear 1111 to rotate, the rotating power is transmitted to a screw rod 1109, and when the screw rod 1109 rotates, a sliding block 1110 drives a lower double-head stepped screw 1103 to slide in a notch of the lower slotting machine frame 1102; because lower fixed pin 1104 and lower fluting frame 1102 fixed connection, go up fixed pin 1107 and last fluting frame 1108 fixed connection, consequently lower double-end ladder screw 1103 slides in the notch of fluting frame 1102 down, goes up double-end ladder screw 1106 and slides in the notch of last fluting frame 1108, and the crane 1105 of scissors formula can cut the fork formula and go up and down when lower double-end ladder screw 1103 and last double-end ladder screw 1106 slide from this to drive the elevating movement (motor 10 just can just reverse).

Furthermore, two sides of the extension plate 1101 are respectively provided with a reinforcing rib 1116 fixedly connected with the gear shifting box 901, so as to enhance the stability of the support frame lifting device 11.

Furthermore, the hinged roll-over stand 12 is arranged on the front side of the upper end face of the cart fence 4, and the roll-over stand 12 is erected on the rear side of the upper end face of the cart fence 4 after being turned over, so that a portable seat can be formed, and people can sit on the shopping cart to rest when being pushed to work, and the shopping cart is very convenient.

Principle of operation

According to actual requirements, the position of the shift shaft 909 in the shift slot 908 is driven by the limit handle 615 controlled by the shift handle 916, so that the shift gear on the shift shaft 909 is meshed with the track gear 905 on the first output shaft 902, the roller gear 906 on the second output shaft 903 or the lifting gear 907 on the third output shaft 904, and the rotation speed of the roller, the running speed of the track and the lifting motion of the lifting rack are respectively controlled.

When the shopping cart is folded, the cart fence 4 is lifted, and the cart fence 4 is folded because connecting rods of all parts of the cart fence 4 are rotatably connected with the front rail 601; meanwhile, the first strut vertical bar 504 on the first strut 501 is fixedly connected with the sliding rail 606 in the guide rail device 603, the sliding rail 606 moves upwards in the sliding rail groove 605 due to the effect of the sliding groove ball 607, at the moment, the first strut 501 and the vertical frame 502 are hinged, therefore, the first strut horizontal bar 505 drives the arc groove 510 to rotate, the vertical frame horizontal bar 507 slides in the arc groove 510, thereby folding the support frame 5, finally forming the folding phenomena of the cart fence 4 and the support frame 5, effectively reducing the occupied area of the shopping cart, and having good space utilization rate.

When the seat is used for rest, the overturning frame 12 is erected at the rear side of the upper end surface of the cart fence 4 after overturning, so that a portable seat can be formed, and the user can sit on the shopping cart for rest when the user is tired.

Claims

1. The utility model provides a multi-functional shopping cart, includes universal wheel (2) and gyro wheel (3) of bottom rear side of shallow main part (1), the bottom front side of shallow main part (1), its characterized in that: the trolley is characterized in that a trolley fence (4) which is hinged to the trolley main body (1) is arranged on the trolley main body, a support frame (5) which can be used for placing articles and a folding guide device (6) which is used for folding the support frame (5) and the trolley fence (4) are arranged in the trolley fence (4); a crawler climbing device (7) and a crawler angle adjusting device (8) for adjusting the angle of the crawler climbing device (7) are arranged on the rear side of the cart main body (1); the lower end of the rear side of the cart main body (1) is provided with a gear shifting device (9) and a motor (10) connected with an input shaft in the gear shifting device (9); an output shaft in the gear shifting device (9) is connected with the roller (3), an output shaft is connected with the crawler climbing device (7), and an output shaft is connected with the support frame lifting device (11); the supporting frame lifting device (11) is connected with the supporting frame (5).

2. The multi-functional shopping cart according to claim 1, wherein: the folding guide device (6) comprises two front stops (601) vertically fixed on the front side of the trolley fence (4) and a rear stop (602) fixed on the rear side of the trolley fence (4); the front gear (601) and the rear gear (602) are both provided with a guide rail device (603); the support frame (5) consists of a first support frame (501), a vertical frame (502) and a second support frame (503) which are combined into a ladder shape, the first support frame (501) is hinged with the vertical frame (502), and the vertical frame (502) is fixedly connected with the second support frame (503); the first support frame (501) comprises a plurality of first support frame vertical rods (504) and a plurality of first support frame cross rods (505); the vertical frame (502) comprises a plurality of vertical frame vertical rods (506) and a plurality of vertical frame cross rods (507); the second support frame (503) comprises a plurality of second support frame vertical rods (508) and a plurality of second support frame cross rods (509); a plurality of arc grooves (510) with 90 degrees are arranged between the first supporting frame (501) and the vertical frame (502); the arc groove (510) is fixedly connected with the first strut cross bar (505), and the vertical strut cross bar (507) can slide in the arc groove (510); the guide rail device (603) on the front rail (601) is connected with the corresponding first strut vertical rod (504); and the guide rail device (603) on the rear rail (602) is connected with the corresponding second strut vertical rod (508).

3. The multi-functional shopping cart according to claim 2, wherein: the guide rail device (603) comprises a slide rail shell (604), a slide rail groove (605) is arranged in the slide rail shell (604), and a slide rail (606) and a sliding groove ball (607) matched with the slide rail (606) are arranged in the slide rail groove (605); the sliding rail (606) is fixedly connected with the first support frame vertical rod (504) or the second support frame vertical rod (508).

4. The multi-functional shopping cart according to claim 1, wherein: the gear shifting device (9) comprises a shifting box body (901), wherein a first output shaft (902), a second output shaft (903) and a third output shaft (904) are arranged in the shifting box body (901); a crawler gear (905) is arranged in the first output shaft (902), and the first output shaft (902) is connected with a crawler climbing device (7); a roller gear (906) is arranged in the second output shaft (903), and the second output shaft (903) is connected with a roller (3); the third output shaft (904) is provided with a lifting gear (907), and the third output shaft (904) is connected with a supporting frame lifting device (11); arc-shaped gear shifting grooves (908) are formed in two side walls of the gear shifting box body (901), a slidable gear shifting shaft (909) is arranged in each gear shifting groove (908), and a gear shifting gear (910) meshed with the crawler gear (905), the roller gear (906) or the lifting gear (907) is arranged on each gear shifting shaft (909); the gear shifting shaft (909) is also provided with a first reduction gear (911); an idler shaft (912) and a motor (10) are further arranged in the gear shifting box body (901), and a driving gear (913) is arranged at the output end of the motor (10); the idler shaft (912) is provided with a second gear (914) which is respectively meshed with the first reduction gear (911) and the driving gear (913); two ends of the gear shifting shaft (909) are respectively connected with a limiting handle (915), and a gear shifting grip (916) is arranged between the limiting handles (915); arc double-spring clamping grooves (917) and single-spring clamping grooves (918) are further formed in the side walls of the two sides of the gear shifting box body (901), and spring balls (919) are arranged in the arc double-spring clamping grooves (917) and the single-spring clamping grooves (918); the limiting handle (915) is provided with a limiting groove (920) matched with the spring ball (919).

5. The multi-functional shopping cart according to claim 4, wherein: the crawler climbing device (7) comprises driving crawler wheels (701) fixed at two ends of a first output shaft (902), two sides of each driving crawler wheel (701) are respectively connected with a crawler baffle (702), a driven crawler wheel (703) is arranged between the crawler baffles (702) at two sides of the same driving crawler wheel (701), and a crawler (704) is arranged between each driven crawler wheel (703) and the driving crawler wheel (701); and a connecting rod (705) is arranged between the track baffles (702) on the driving track wheels (701) at the two ends of the first output shaft (902).

6. The multi-functional shopping cart according to claim 5, wherein: the crawler angle adjusting device (8) comprises a short connecting rod (801) fixedly connected with the trolley main body (1), and a ratchet wheel (802) is arranged at the end part of the short connecting rod (801); the middle part of the connecting rod (705) is hinged with a long connecting rod (803), and the end part of the long connecting rod (803) is connected with the ratchet wheel (802).

7. The multi-functional shopping cart according to claim 6, wherein: the end part of the long connecting rod (803) is also provided with a pawl (804) matched with the ratchet wheel (802), and the pawl (804) is connected with a pull ring (805) through a spring.

8. The multi-functional shopping cart according to claim 4, wherein: the supporting frame lifting device (11) comprises an extension plate (1101) fixed at the bottom of the gear shifting box body (901), a lower slotted rack (1102) is arranged on the extension plate (1101), and a lower double-head stepped screw (1103) is arranged in a notch of the lower slotted rack (1102) in a sliding manner; a lower fixing pin (1104) is fixedly arranged at the end part of the lower slotting machine frame (1102), the fixing pin (1104) and the lower double-head stepped screw (1103) are respectively connected with a lifting frame (1105) of a scissor fork type, and the upper end of the lifting frame (1105) is respectively connected with an upper double-head stepped screw (1106) and an upper fixing pin (1107); an upper slotted frame (1108) is arranged on the support frame (5); the upper fixing pin (1107) is fixedly connected with the end part of the upper slotted rack (1108), and the upper double-head stepped screw (1106) is arranged in the notch of the upper slotted rack (1108) in a sliding manner; the extension plate (1101) is also provided with a lead screw (1109) matched with a bearing, the lead screw (1109) is provided with a sliding block (1110) matched with threads, and the sliding block (1110) is fixedly connected with the lower double-thread stepped screw (1103); the end part of the screw rod (1109) is provided with a driven bevel gear (1111); a first transmission gear (1112) is also fixedly arranged on the third output shaft (904); the gear shifting box body (901) is provided with a transmission shaft (1113), one end of the transmission shaft (1113) is provided with a second transmission gear (1114) meshed with the first transmission gear (1112), and the other end of the transmission shaft (1113) is provided with a driving bevel gear (1115) meshed with the driven bevel gear (1111).

9. The multi-function shopping cart as recited in claim 8, further comprising: and reinforcing ribs (1116) fixedly connected with the gear shifting box body (901) are respectively arranged on two sides of the extension plate (1101).

10. The multi-functional shopping cart according to claim 1, wherein: the front side of the upper end face of the cart fence (4) is provided with a hinged turnover frame (12), and the turnover frame (12) is erected at the rear side of the upper end face of the cart fence (4) after being turned over.