CN104097675B - Shopping cart - Google Patents

Shopping cart Download PDF

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Publication number
CN104097675B
CN104097675B CN201410380381.0A CN201410380381A CN104097675B CN 104097675 B CN104097675 B CN 104097675B CN 201410380381 A CN201410380381 A CN 201410380381A CN 104097675 B CN104097675 B CN 104097675B
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China
Prior art keywords
slide
ring gear
slide block
retracing spring
vehicle frame
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Expired - Fee Related
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CN201410380381.0A
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Chinese (zh)
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CN104097675A (en
Inventor
梁达兵
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Individual
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Individual
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Priority to CN201410380381.0A priority Critical patent/CN104097675B/en
Publication of CN104097675A publication Critical patent/CN104097675A/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses shopping cart, comprise vehicle frame, storing basket, front-wheel, trailing wheel and brake gear, storing basket is installed on vehicle frame, front-wheel, trailing wheel are two, and being all connected to the both sides of vehicle frame, connected by rotating shaft between two trailing wheels, vehicle frame is fixed in rotating shaft, trailing wheel comprises tripod and roller, three legs of tripod are all connected with roller, and roller is connected with brake gear, and brake gear is installed on tripod and vehicle frame, tripod is placed on rotating shaft, and can along axis of rotation.The present invention has brake, folding function concurrently, and simple to operate, use safety, do not affect obstacles such as crossing step during brake yet, time folding, effectively save accommodation space.

Description

Shopping cart
Technical field
The present invention relates to shopping cart field, particularly a kind of shopping cart being easy to up/down steps.
Background technology
People push shopping cart when doing shopping, and surprisingly slide or collision free obstacle to prevent shopping cart, need brake in time to control the safe condition of shopping cart.When shopping cart loading up/down steps, due to vehicle body deadweight, existing brake gear can be checked wheel and slip after preventing shopping cart, but but limits the rotation of wheel, makes shopping cart up/down steps difficulty.
Summary of the invention
The object of the invention is to provide a kind of shopping cart, can brake while still can up/down steps.
According to an aspect of the present invention, provide shopping cart, comprise vehicle frame, storing basket, front-wheel, trailing wheel and brake gear, storing basket is installed on vehicle frame, and front-wheel, trailing wheel are two, and is all connected to the both sides of vehicle frame, connected by rotating shaft between two trailing wheels, vehicle frame is fixed in rotating shaft, and trailing wheel comprises tripod and roller, and three legs of tripod are all connected with roller, roller is connected with brake gear, brake gear is installed on tripod, and tripod is placed on rotating shaft, and can along axis of rotation.
Its beneficial effect is: during due to shopping cart up/down steps, brake gear is slipped after being prevented by locking roller, simultaneously, promoting shopping cart makes tripod rotate around the axis, thus the roller on tripod can climb over step under force of sliding friction effect, when therefore can realize shopping cart brake, still the obstacles such as step can be crossed.
In some embodiments, brake gear comprises BK Brake Switch, first position-limited wheel, tractor, hauling rope, stop pin, stop key seat, first retracing spring and spragging gear, three legs of tripod are all fixed with stop key seat and bearing pin, the center of tripod is fixed with tractor, stop pin, first retracing spring is installed in stop key seat, stop pin can slide along stop key seat, one end of first retracing spring is pressed in the bottom of stop key seat, the other end of the first retracing spring is pressed in stop pin, bearing pin is arranged with spragging gear and roller, roller and spragging gear pass through gears meshing, one end and the spragging gear of stop pin pass through gears meshing, the other end of stop pin is connected with tractor by braking rope, hauling rope is connected with between the tractor of vehicle frame both sides, first position-limited wheel has two, all be fixed on vehicle frame, BK Brake Switch is provided with between two the first position-limited wheels, BK Brake Switch is fixed on vehicle frame, hauling rope is pressed between the first position-limited wheel and BK Brake Switch.
Its beneficial effect is: due to pressing BK Brake Switch, hauling rope is shunk between two the first position-limited wheels, thus pull the tractor of vehicle frame both sides, tractor pulls braking rope, braking rope pulls stop pin to slide along stop key seat, the gears meshing place of stop pin and spragging gear departs from, first retracing spring is compressed simultaneously, spragging gear can rotate along bearing pin, and drive roller to rotate, therefore the unblock of roller is achieved, when promoting shopping cart, trailing wheel can roll advance, releasing of brake switch, hauling rope resets, first retracing spring promotes stop pin and resets, stop pin engages again with the gear of spragging gear, spragging gear can not rotate along bearing pin, thus achieve the locking of roller.
In some embodiments, tractor comprises rotor, antifriction-bearing box and crank, rotor by roller bearings in rotating shaft, the both sides of rotating shaft upper frame are overlapped respectively and are had crank, be connected with hauling rope between the crank of vehicle frame both sides, crank is placed on and is fixed on rotor, and rotor is connected with braking rope.
Its beneficial effect is: because hauling rope can pull the forward and reverse rotation of crank, and rotor driven rotates, and therefore can realize pulling braking rope to realize locking and the unblock of stop pin pair roller.
In some embodiments, BK Brake Switch comprises switch seat, ring gear seat, last item, rotate ring gear, drive ring gear and the second retracing spring, switch seat is placed on last item, one end of last item is provided with gear platform, the other end of last item is socketed with the chuck for blocking hauling rope, on last item, self catcher platform one end is arranged with the second retracing spring successively, drive ring gear and rotate ring gear, ring gear is driven to be fixed on last item, rotate ring gear and be resisted against driving ring gear, and can rotate around last item, ring gear seat setting-in enters switch seat, ring gear cover for seat in and be engaged in rotation ring gear, ring gear seat, rotate ring gear, the tooth of ring gear is driven to be helical teeth in the same way, the tooth of ring gear seat is formed by connecting by two helical teeth and adapting table, second retracing spring is pressed in and drives between ring gear and gear platform.
Its beneficial effect is: owing to pressing the gear platform of last item, second retracing spring is compressed, rotate ring gear and be ejected ring gear seat, drive the helical teeth extruding of ring gear to rotate the helical teeth of ring gear, make rotation ring gear rotate a tooth position, in the second retracing spring reset response lower support in the adapting table of ring gear seat, now rotate ring gear to be separated with driving ring gear, and the chuck of last item end extruding hauling rope, and shrink between two position-limited wheels, thus pulling traction rope makes roller unlock; Again press the gear platform of last item, second retracing spring is compressed, rotate ring gear and be again ejected ring gear seat, the helical teeth of ring gear is driven again to extrude the helical teeth rotating ring gear, rotation ring gear is made to rotate a tooth position, under the second retracing spring reset response, rotate ring gear be again engaged in ring gear seat, thus shrink hauling rope locking.
In some embodiments, shopping cart also comprises rear wheel support and folding device, and vehicle frame is connected by rear wheel support with rotating shaft, and rear wheel support and storing basket all can rotate by relative frame, and rear wheel support, storing basket are limited in folding device respectively.
Its beneficial effect is: due to folding device action, makes rear wheel support, storing basket constraint relief, and rear wheel support, storing basket relative frame rotate and fold, and therefore can realize the folding of shopping cart, save accommodation space.
In some embodiments, folding device comprises folding switch, first slide, first slide block, second position-limited wheel and the 3rd retracing spring, first slide is fixed on vehicle frame, and be provided with chute, the both sides of the first slide are separately installed with the first slide block for sliding, one end of first slide block is provided with the first slide bar, the external part of the first slide bar passes and is limited in the first slide, on first slide bar, cover has the 3rd retracing spring, 3rd retracing spring is pressed between the first slide block and the first slide, the other end of the first slide block is against rear wheel support and support storing basket, the bottom of the first slide block is provided with sliding pin, sliding pin inserts in chute, the external part clasp joint of sliding pin has stay cord, stay cord is pressed on the second position-limited wheel, and be connected with folding switch.
Its beneficial effect is: because folding switch pulls stay cord, stay cord hooks sliding pin and slides in chute, slide block also slides in base simultaneously, and make the 3rd retracing spring compression, when rear wheel support, storing basket lose the constraint of slide block, therefore can realize rear wheel support, storing basket and rotate around vehicle frame respectively and fold.
In some embodiments, folding switch comprises the second slide, second slide block, 4th retracing spring and latch, second slide is fixed on vehicle frame, second slide block is installed on the second slide, and can slide in the second slide, one end of second slide block is provided with the second slide bar, the external part of the second slide bar passes and is limited in the second slide, second jack rod sleeve has the 4th retracing spring, 4th retracing spring is pressed between the second slide block and the second slide, the other end of the second slide block is connected with stay cord, the sidepiece of the second slide block is provided with slide block, slide block can slide along the second slide, latch passes and is limited in the second slide, second slide block.
Its beneficial effect is: because slide block slides along the second slide, the second slide block is driven to slide along the second slide, and make the 4th retracing spring compression, thus the second slide block pulls stay cord, and can by latch by spacing for the second slide block, thus make stay cord spacing, therefore can realize the folding process being controlled folding device by stay cord.
The invention has the beneficial effects as follows: have brake, folding function concurrently, and simple to operate, use safety, do not affect obstacles such as crossing step during brake yet, time folding, effectively save accommodation space.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the shopping cart of an embodiment of the present invention;
Fig. 2 is A place enlarged diagram in Fig. 1;
Fig. 3 is the schematic perspective view of brake gear in Fig. 1;
Fig. 4 is the exploded view of BK Brake Switch in Fig. 1;
Fig. 5 is the schematic perspective view of folding device in Fig. 1;
Fig. 6 is the schematic perspective view of folding switch in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Fig. 1 show schematically show the shopping cart according to one embodiment of the present invention.
As shown in Figure 1, this shopping cart comprises vehicle frame 1, rear wheel support 2, front-wheel support 3, storing basket 4, front-wheel 5, trailing wheel 6, brake gear 7 and folding device 8.
Vehicle frame 1 is made up of two bend pipes be arranged in parallel 9, every root bend pipe 9 is made up of upper broken pipe 10 and lower broken pipe 11, bend pipe 9 is preferably stainless steel tube, the tail end of upper broken pipe 10 is laterally socketed with handrail 12, the tail end horizontal welding of lower broken pipe 11 has front-wheel support 3, the two ends of front-wheel support 3 are separately installed with a front-wheel 5, and front-wheel 5 is along ground surface.Bending part grafting rear wheel support 2 respectively of two bend pipes 9, rear wheel support 2 pipe 9 of going for a stroll rotates, the tail end horizontal welding rotating shaft 13 of two rear wheel supports 2, the two ends of rotating shaft 13 are separately installed with a trailing wheel 6, trailing wheel 6 comprises tripod 14 and roller 15, and three legs 16 of tripod 14 are all connected with a roller 15.
As shown in Figure 1, 2, 3, brake gear 7 comprises BK Brake Switch 17, first position-limited wheel 18, tractor 19, hauling rope 20, stop pin 21, stop key seat 22, first retracing spring 23 and spragging gear 24, tripod 14 is placed on rotating shaft 13, on three legs 16 of tripod 14, equal screw is fixed with stop key seat 22 and bearing pin 25, and the center of tripod 14 is fixed with tractor 19.Stop pin 21, first retracing spring 23 is installed in stop key seat 22, stop pin 21 setting-in enters stop key seat 22, free-running fit between stop pin 21 and stop key seat 22, thus stop pin 21 slides along stop key seat 22, one end of first retracing spring 23 is pressed in the bottom of stop key seat 22, the other end of the first retracing spring 23 is pressed in stop pin 21, bearing pin 25 is arranged with spragging gear 24 and roller 15, roller 15 and spragging gear 24 are by gears meshing, and one end and the spragging gear 24 of stop pin 21 pass through gears meshing.
Tractor 19 comprises rotor 27, antifriction-bearing box 28 and crank 29, rotor 27 is supported in rotating shaft 13 by two antifriction-bearing boxs 28, the both sides of rotating shaft 13 upper frame 1 are overlapped respectively and are had crank 29, hauling rope 20 is connected with between crank 29, crank 29 is placed on and is fixed on rotor 27, the rotating disk 56 of rotor 27 is provided with three fixed orifices 57, the other end of stop pin 21 by braking rope 26 accordingly clasp joint in three fixed orifices 57.
First position-limited wheel 18 has two, and equal screw is fixed in handrail 12, and fix BK Brake Switch 17 in handrail 12 by screw between two the first position-limited wheels 18, hauling rope 20 is pressed between the first position-limited wheel 18 and BK Brake Switch 17, makes hauling rope 20 have tensile force.
As Fig. 2, shown in 4, BK Brake Switch 17 comprises switch seat 30, ring gear seat 31, last item 32, rotate ring gear 33, drive ring gear 34 and the second retracing spring 35, switch seat 30 is placed on last item 32, one end of last item 32 is provided with gear platform 36, the other end of last item 32 is socketed with the chuck 37 for blocking hauling rope 20, on last item 32, self catcher platform 36 one end is arranged with the second retracing spring 35 successively, drive ring gear 34 and rotate ring gear 33, ring gear 34 is driven to be fixed on last item 32, rotate ring gear 33 and be resisted against driving ring gear 34, and can rotate around last item 32, ring gear seat 31 setting-in enters switch seat 30, ring gear seat 31 is placed on and is engaged in and rotates ring gear 33, ring gear seat 31, rotate ring gear 33, the tooth of ring gear 34 is driven to be helical teeth in the same way, the tooth of ring gear seat 31 is formed by connecting by two helical teeth and adapting table 38, second retracing spring 35 is pressed in and drives between ring gear 34 and gear platform 36.
As Fig. 1, 2, 3, shown in 4, during shopping cart brake, the gear platform 36 of pressing last item 32, second retracing spring 35 is compressed, rotate ring gear 33 and be ejected ring gear seat 31, the helical teeth extruding of ring gear 34 is driven to rotate the helical teeth of ring gear 33, rotation ring gear 33 is made to rotate a tooth position, in the second retracing spring 35 reset response lower support in the adapting table 38 of ring gear seat 31, now rotate ring gear 33 to be separated with driving ring gear 34, and the chuck 37 of last item 32 end extrudes hauling rope 20, and shrink between two the first position-limited wheels 18, hauling rope 20 is made to pull crank 29 to rotate forward, thus rotor driven 27 rotates, the rotating disk 56 of rotor 27 pulls braking rope 26, braking rope 26 pulls stop pin 21 to slide along stop key seat 22, stop pin 21 departs from the gears meshing place of spragging gear 24, first retracing spring 23 is compressed simultaneously, spragging gear 24 can rotate along bearing pin 25, and drive roller 15 to rotate, therefore the unblock of roller 15 is achieved, when promoting shopping cart, trailing wheel 6 can roll advance.
Again press the gear platform 36 of last item 32, second retracing spring 35 is compressed, rotate ring gear 33 and be again ejected ring gear seat 31, the helical teeth of ring gear 34 is driven again to extrude the helical teeth rotating ring gear 33, rotation ring gear 33 is made to rotate a tooth position, under the second retracing spring 35 reset response, rotate ring gear 33 be again engaged in ring gear seat 31, hauling rope 20 shrinks, crank 29 is driven to reverse, the rotating disk 56 of rotor 27 pulls braking rope 26 to shrink, first retracing spring 23 promotes stop pin 21 and resets, stop pin 21 engages again with the gear of spragging gear 24, spragging gear 24 can not rotate along bearing pin 25, thus achieve the locking of roller 15.
During shopping cart up/down steps, brake gear 7 is slipped after being prevented by locking roller 15, simultaneously, promoting shopping cart makes tripod 14 rotate along rotating shaft 13, thus the roller 15 on tripod 14 can climb over step under force of sliding friction effect, when therefore can realize shopping cart brake, still the obstacles such as step can be crossed.
As shown in Figure 1, storing basket 4 forms by multilayer steel wire square frame 39 is stacking, setting-in base plate 40 in the steel wire square frame 39 of bottom, and the two ends on every layer of steel wire square frame 39 corresponding steel wire limit are inserted in the upper broken pipe 10 of two bend pipes 9 respectively, and rotate around upper broken pipe 10.
As shown in Figure 1,5, folding device 8 comprises folding switch 41, first slide 42, first slide block 43, second position-limited wheel 44 and the 3rd retracing spring 45, first slide 42 screw is fixed on vehicle frame 1, and be provided with chute 46, the both sides of the first slide 42 are separately installed with the first slide block 43, first slide block 43 and the first slide 42 free-running fit, makes the first slide block 43 slide along the first slide 42.One end of first slide block 43 is provided with the first slide bar 47, the external part of the first slide bar 47 passes and is limited in the first slide 42 by the first boss 58, on first slide bar 47, cover has the 3rd retracing spring 45,3rd retracing spring 45 is pressed between the first slide block 43 and the first slide 42, the top of rear wheel support 2 is held between two the first slide blocks 43, and two the first slide blocks 43 are supported in the base plate 40 of storing basket 4.The bottom of the first slide block 43 is provided with sliding pin 48, and sliding pin 48 inserts in chute 46, and sliding pin 48 is slided along chute 46, and the external part clasp joint of sliding pin 48 has stay cord 49, and stay cord 49 is pressed on the second position-limited wheel 44, makes stay cord 49 have tensile force.
As Fig. 1, shown in 6, folding switch 41 comprises the second slide 50, second slide block 51, 4th retracing spring 52 and latch 53, second slide 50 screw is fixed on vehicle frame 1, second slide block 51 is installed in the second slide 50, second slide block 51 and the second slide 50 free-running fit, second slide block 51 is slided along the second slide 50, one end of second slide block 51 is fixed with the second slide bar 54, the external part of the second slide bar 54 passes and is limited in the second slide 50 by the second positive stop lug boss 59, second slide bar 54 cover has the 4th retracing spring 52, 4th retracing spring 52 is pressed between the second slide block 51 and the second slide 50, the other end of the second slide block 51 is connected with stay cord 49, the sidepiece of the second slide block 51 is provided with slide block 55, slide block 55, slide block 55 inserts in the groove 60 on the second slide 50, slide block 55 is slided along the second slide 50, latch 53 is through the second slide 50, second slide block 51, the second slide 50 is made with extracting by the insertion of latch 53, second slide block 51 is locked and is unlocked.
As Fig. 1, 5, shown in 6, when shopping cart folds, extract latch 53, folding switch 41 unlocks, slide block 55 slides along the second slide 50, the second slide block 51 is driven to slide along the second slide 50, and the 4th retracing spring 52 is compressed, thus the second slide block 51 pulls stay cord 49, stay cord 49 hooks sliding pin 48 and slides in chute 46, first slide block 43 also slides in the first slide 42 simultaneously, and the 3rd retracing spring 45 is compressed, the slip of the first slide block 43 makes rear wheel support 2 lose longitudinal restraint, and the base plate 40 of storing basket 4 loses vertical constraint, thus rear wheel support 2 can be gone for a stroll, pipe 9 rotates, and drive rotating shaft 13 and trailing wheel 6 to be folded to vehicle frame 1, and base plate 40 drives each layer steel wire square frame 39 on storing basket 4 rotate around upper broken pipe 10 and be folded to vehicle frame 1 simultaneously, now insert latch 53 folding switch 41 is locked.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (5)

1. shopping cart, it is characterized in that, comprise vehicle frame (1), storing basket (4), front-wheel (5), trailing wheel (6), brake gear (7), rear wheel support (2) and folding device (8), described storing basket (4) is installed on vehicle frame (1), described front-wheel (5), trailing wheel (6) is two, and be all connected to the both sides of vehicle frame (1), connected by rotating shaft (13) between two described trailing wheels (6), vehicle frame (1) is fixed in described rotating shaft (13), described trailing wheel (6) comprises tripod (14) and roller (15), three legs (16) of described tripod (14) are all connected with roller (15), described roller (15) is connected to described brake gear (7), described brake gear (7) is installed on tripod (14), described tripod (14) is placed on rotating shaft (13), and can rotate along rotating shaft (13), described vehicle frame (1) is connected by rear wheel support (2) with described rotating shaft (13), described rear wheel support (2) and storing basket (4) all can rotate by relative frame (1), described rear wheel support (2), storing basket (4) is limited in folding device (8) respectively, described folding device (8) comprises folding switch (41), first slide (42), first slide block (43), second position-limited wheel (44) and the 3rd retracing spring (45), described first slide (42) is fixed on vehicle frame (1), and be provided with chute (46), the both sides of described first slide (42) are separately installed with the first slide block (43) for sliding, one end of described first slide block (43) is provided with the first slide bar (47), the external part of described first slide bar (47) passes and is limited in the first slide (42), the upper cover of described first slide bar (47) has the 3rd retracing spring (45), described 3rd retracing spring (45) is pressed between the first slide block (43) and the first slide (42), the other end of described first slide block (43) is against rear wheel support (2) and support storing basket (4), the bottom of described first slide block (43) is provided with sliding pin (48), described sliding pin (48) inserts in chute (46), the external part clasp joint of described sliding pin (48) has stay cord (49), described stay cord (49) is pressed on the second position-limited wheel (44), and be connected with described folding switch (41).
2. shopping cart according to claim 1, it is characterized in that, described folding switch (41) comprises the second slide (50), second slide block (51), 4th retracing spring (52) and latch (53), described second slide (50) is fixed on vehicle frame (1), described second slide block (51) is installed on the second slide (50), and can slide in the second slide (50), one end of described second slide block (51) is provided with the second slide bar (54), the external part of described second slide bar (54) passes and is limited in the second slide (50), described second slide bar (54) cover has the 4th retracing spring (52), described 4th retracing spring (52) is pressed between the second slide block (51) and the second slide (50), the other end of described second slide block (51) is connected with stay cord (49), the sidepiece of described second slide block (51) is provided with slide block (55), described slide block (55) can slide along the second slide (50), described latch (53) passes and is limited in the second slide (50), second slide block (51).
3. shopping cart according to claim 1 and 2, it is characterized in that, described brake gear (7) comprises BK Brake Switch (17), first position-limited wheel (18), tractor (19), hauling rope (20), stop pin (21), stop key seat (22), first retracing spring (23) and spragging gear (24), three legs (16) of described tripod (14) are all fixed with stop key seat (22) and bearing pin (25), the center of described tripod (14) is fixed with tractor (19), described stop pin (21), first retracing spring (23) is installed in stop key seat (22), described stop pin (21) can slide along stop key seat (22), one end of described first retracing spring (23) is pressed in the bottom of stop key seat (22), the other end of described first retracing spring (23) is pressed in stop pin (21), described bearing pin (25) is arranged with spragging gear (24) and roller (15), described roller (15) and described spragging gear (24) pass through gears meshing, one end and the described spragging gear (24) of described stop pin (21) pass through gears meshing, the other end of described stop pin (21) is connected with described tractor (19) by braking rope (26), hauling rope (20) is connected with between the described tractor (19) of vehicle frame (1) both sides, described first position-limited wheel (18) has two, all be fixed on vehicle frame (1), BK Brake Switch (17) is provided with between two described first position-limited wheels (18), described BK Brake Switch (17) is fixed on vehicle frame (1), described hauling rope (20) is pressed between the first position-limited wheel (18) and BK Brake Switch (17).
4. shopping cart according to claim 3, it is characterized in that, described tractor (19) comprises rotor (27), antifriction-bearing box (28) and crank (29), described rotor (27) is supported in rotating shaft (13) by antifriction-bearing box (28), the both sides of described rotating shaft (13) upper frame (1) are overlapped respectively crank (29), hauling rope (20) is connected with between the described crank (29) of vehicle frame (1) both sides, described crank (29) is placed on and is fixed on rotor (27), described rotor (27) is connected with described braking rope (26).
5. shopping cart according to claim 3, it is characterized in that, described BK Brake Switch (17) comprises switch seat (30), ring gear seat (31), last item (32), rotate ring gear (33), drive ring gear (34) and the second retracing spring (35), described switch seat (30) is placed on last item (32), one end of described last item (32) is provided with gear platform (36), the other end of described last item (32) is socketed with the chuck (37) for blocking hauling rope (20), upper self catcher platform (36) one end of described last item (32) is arranged with the second retracing spring (35) successively, drive ring gear (34) and rotate ring gear (33), described driving ring gear (34) is fixed on last item (32), described rotation ring gear (33) is resisted against and drives ring gear (34), and can rotate around last item (32), described ring gear seat (31) setting-in enters switch seat (30), described ring gear seat (31) is placed on and is engaged in and rotates ring gear (33), described ring gear seat (31), rotate ring gear (33), the tooth of ring gear (34) is driven to be helical teeth in the same way, the tooth of described ring gear seat (31) is formed by connecting by two helical teeth and adapting table (38), described second retracing spring (35) is pressed in and drives between ring gear (34) and gear platform (36).
CN201410380381.0A 2014-08-04 2014-08-04 Shopping cart Expired - Fee Related CN104097675B (en)

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CN109204591A (en) * 2016-11-14 2019-01-15 中国人民解放军陆军炮兵防空兵学院 A kind of efficient full landform composite walking mechanism
CN107097818B (en) * 2017-02-20 2019-11-26 江苏禹高物联科技有限公司 A kind of multifunctional intellectual supermarket shopping car
CN108581509A (en) * 2018-04-23 2018-09-28 芜湖筱笙机电科技有限公司 A kind of drilling hole machine tool easy to remove
CN110610653B (en) * 2019-09-28 2020-06-16 温州谷枫电子科技有限公司 Vertical type windproof greeting board

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US5516127A (en) * 1993-07-20 1996-05-14 Guilford Glazer Cart for negotiating escalators
US6098999A (en) * 1998-08-13 2000-08-08 Anastasia; James A. Safety shopping cart
CN2792895Y (en) * 2005-03-10 2006-07-05 湾盛贸易股份有限公司 Improved structure of small shopping trolley
CN102126510A (en) * 2011-02-16 2011-07-20 区基平 Folded double-layer shopping cart
CN202243590U (en) * 2011-08-31 2012-05-30 天津市鑫成新科贸有限公司 Shopping cart capable of getting on upstairs by hand pulling
CN203032715U (en) * 2012-12-31 2013-07-03 董有水 Shopping cart

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