CN211032624U - Trolley for logistics system and brake device thereof - Google Patents

Abstract

The utility model discloses a trolley for logistics system and a brake device thereof, which comprises a pedal assembly, a pedal, connecting rods, a first rotating shaft and a brake assembly, wherein the connecting rods are respectively arranged at two ends of the pedal assembly; the brake assembly comprises a cam and a cam seat, wherein two side surfaces of the cam are respectively provided with a second rotating shaft in a protruding mode, the second rotating shaft is provided with a shaft hole along the axial direction, the shaft hole is matched with the first rotating shaft, and the cam can rotate along with the rotation of the first rotating shaft; a concave pit is arranged in the middle of the cam; the cam seat is formed by oppositely combining two half bodies, the upper end of the cam seat is fixed through a clamp spring, and the second rotating shaft is rotatably arranged in the cam seat; and a locking shaft is arranged in the cam seat, the upper end of the locking shaft is abutted against the concave pit, and a spring is sleeved at the bottom end of the locking shaft. The utility model discloses, rotation control brake assembly through pedal assembly holds wheel, easy operation, convenient to use tightly.

Description

Trolley for logistics system and brake device thereof

Technical Field

The utility model relates to a logistics management technical field, concretely relates to handcart for system and brake equipment thereof.

Background

With the explosion of the internet economy, advanced technologies such as automation and information are increasingly applied to intelligent logistics storage centers. However, due to the limitation of investment cost, the current intelligent logistics storage center cannot be completely unmanned, and most of the intelligent logistics storage center adopts a mode of manually picking commodities and automatically transporting the commodities by using a conveyor belt or a mobile robot.

Because the mode of utilizing the conveyer belt to transport commodity, the system is stiff, can't change in a flexible way, consequently, the scheme that mobile robot replaced the conveyer belt can improve the flexibility of system greatly. Therefore, the chinese utility model patent CN107628404A discloses a sorting method based on order form to person in the logistics storage center, the commodity storage area and the commodity transportation area of the logistics storage center are separated independently, the picker and the mobile transfer robot work in different channels, which not only ensures the safety, but also ensures the high-speed movement of the mobile transfer robot, and improves the efficiency; and the mobile carrying robot does not enter the goods taking channel, the running path is simple, the modification cost of the logistics storage center is reduced to the greatest extent, and the complexity and the maintenance cost of a software and hardware system are reduced. However, the above solution requires a large number of mobile robots to be deployed for transporting goods, and the investment cost is high.

In view of the above, there is a need for an improvement on the existing intelligent logistics storage center to reduce the investment cost and improve the efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the scheme of present all utilization mobile robot transmission commodity, investment cost is too high problem.

In order to solve the technical problem, the utility model provides a brake device, include:

the pedal assembly comprises a pedal, two ends of the pedal are respectively provided with a connecting rod, the other end of the connecting rod is fixedly provided with a first rotating shaft, and the first rotating shaft is prismatic and used for driving the brake assembly;

the brake assembly comprises a cam and a cam seat, wherein two side surfaces of the cam are respectively provided with a second rotating shaft in a protruding mode, the second rotating shaft is provided with a shaft hole along the axial direction, the shaft hole is matched with the first rotating shaft, and the cam can rotate along with the rotation of the first rotating shaft; a concave pit is arranged in the middle of the cam;

the cam seat is formed by oppositely combining two half bodies, the upper end of the cam seat is fixed through a clamp spring, and the second rotating shaft is rotatably arranged in the cam seat; and a locking shaft is arranged in the cam seat, the upper end of the locking shaft is abutted against the concave pit, and a spring is sleeved at the bottom end of the locking shaft.

In the scheme, the upper end of the cam seat is provided with two pin shafts which are perpendicular to the axis of the cam seat, the outer circumferential surface of the cam is provided with two grooves, and the pin shafts are matched with the grooves.

The trolley for the logistics system comprises an underframe and wheels arranged on the underframe, and is characterized in that an upper layer support and a lower layer support are arranged on the underframe, the upper layer support and the lower layer support are arranged at intervals and are respectively used for bearing turnover boxes, and the wheels are provided with the brake devices.

In this scheme, the upper end of wheel is equipped with the connecting pipe, the camshaft cartridge is in from bottom to top inside the upper end of connecting pipe, the lower extreme of connecting pipe is equipped with the extension axle, the locking axle sets up in the shaft hole of extension axle, the lower extreme is relative with the wheel body of wheel.

In the scheme, a hand brake is arranged on the trolley.

In this scheme, the rear portion left and right sides of chassis sets up two first stands respectively, the place ahead of first stand is equipped with the second stand, first stand with the bottom of second stand with the chassis is fixed, every side first stand with set up upper crossbeam and lower floor's crossbeam on the second stand respectively, the upper crossbeam of the left and right sides constitutes upper support, the lower floor's crossbeam of the left and right sides is constituteed lower floor's support.

In this scheme, the top of first stand is equipped with the thing board of putting temporarily, it is fixed with first stand and second stand that the dull and stereotyped bottom surface of thing is put temporarily through the vaulting pole, the vaulting pole is slope to the place ahead from bottom to top.

In the scheme, a plurality of layers of stair boards are arranged from bottom to top in a space surrounded by the first upright post and the second upright post, so that a ladder is formed at the rear part of the goods picking trolley.

In the scheme, a tool box is arranged between the stair boards and used for placing tools for picking goods.

Compared with the prior art, the trolley for the logistics system and the brake device thereof provided by the utility model control the braking of the trolley through the pedal assembly, and have simple operation and convenient use; the trolley is provided with an upper layer bracket and a lower layer bracket, so that the quantity and the stability of cargos carried by the trolley are improved; temporary placement frames are arranged on the top surfaces of the first upright post and the second upright post, so that a goods picker can place goods temporarily; set up the footboard of ascending a height between the first stand, conveniently pick the goods that the goods shelves are high.

Drawings

Fig. 1 is a schematic view of a logistics storage center provided by the present invention;

FIG. 2 is a schematic structural view of the intelligent transfer station of the present invention;

fig. 3 is a schematic view of the trolley connecting device of the present invention;

fig. 4 is a schematic view of a bridging device according to the present invention;

fig. 5 is a schematic view of the feeding device of the transfer station of the present invention;

fig. 6 is a schematic view of the robot docking device of the present invention;

fig. 7 is a schematic view of another angle of the robot docking device of the present invention;

fig. 8 is a schematic view of a drive assembly according to the present invention;

fig. 9 is a schematic view of the picking cart of the present invention;

fig. 10 is a schematic view of the picking cart of the present invention after unloading the turnover box;

FIG. 11 is a schematic view of a transfer case of the present invention;

FIG. 12 is a schematic view of a middle and rear wheel double-wheel brake device according to the present invention;

fig. 13 is an exploded schematic view of the middle brake assembly of the present invention;

FIG. 14 is a cross-sectional view of the brake assembly of the present invention;

fig. 15 is a schematic structural view of the middle cam of the present invention.

Detailed Description

The utility model provides a logistics storage center and intelligent transfer station thereof can reduce logistics storage center's deployment cost, raises the efficiency.

In order to explain and explain the technical solution and implementation of the present invention more clearly, several preferred embodiments for implementing the technical solution of the present invention are introduced below. It should be understood that the specific embodiments described below are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is the utility model provides a logistics storage center sketch, as shown in fig. 1, the utility model provides a logistics storage center has arranged commodity and has deposited district 100 and commodity transportation district 200, and commodity is deposited district 100 and is equipped with multirow interval arrangement's goods shelves 300, and the commodity is placed on goods shelves 300, is the walking passageway 400 of picking the goods clerk between two adjacent rows of goods shelves 300. The picker pushes the picking cart 800 to walk in the walk-through passage 400 and takes corresponding goods from the corresponding shelves 300 according to the order and places them in the circulation boxes 600 on the picking cart 800.

Commodity transportation district 100 is adjacent with commodity storage area 200, and walking channel 400 between the multirow goods shelves 300 is perpendicular with commodity transportation district 200, and commodity transportation district 200 is equipped with a plurality of interval arrangement's intelligent transfer station 700, and intelligent transfer station 700 comprises goods transfer station and shipment transfer station, transports turnover case 600 through mobile robot 500 between each intelligent transfer station 700, and mobile robot 500 leads along the subaerial landmark sign that sets up in commodity transportation district 200 and traveles.

The commodity sorting method of the logistics storage center comprises the following steps:

the management system of the logistics storage center acquires an order from the order system, obtains shelf numbers of all goods in the order, and informs the order, the goods to be picked, the shelves and the positions of the goods to be picked to each picker in charge of picking the goods on the corresponding shelves;

when any order picker puts any commodity in the order into the turnover box on the picking trolley, informing the management system of the order picking start and reporting the number of the turnover box; at the moment, the goods picker is called a first goods picker, the goods picking trolley is called a first goods picking trolley, and the first goods put into the turnover box is called a first goods;

and the management system sends the container number of the order to other order pickers related to the order.

After the first order picker places all goods on the goods shelves in charge of the first order picker into the turnover box according to the order, the first order picking trolley is pushed to the first goods delivery transfer station, and the first goods delivery transfer station automatically takes down the turnover box from the first order picking trolley and conveys the turnover box to the first mobile robot. The first mobile robot can run to the first delivery transfer station in advance according to the notice of the management system so as to receive the turnover box.

The first mobile robot is not necessarily a designated mobile robot, and the management system may notify an idle mobile robot closest to the first shipment terminal as the first mobile robot, depending on the position of each mobile robot in the commodity transportation area and the loading condition.

The first mobile robot transports the turnover box to a goods loading transfer station beside a goods shelf corresponding to the next commodity according to the order information, the goods loading transfer station is called as a first goods loading transfer station at the moment, the first goods loading transfer station automatically takes the turnover box off the first mobile robot, and when a picker (a second picker) of the next commodity plugs in a second picking trolley to the first goods loading transfer station, the turnover box is transported to the second picking trolley. If no second picking trolley is connected with the first goods loading rotating station, the turnover box is parked on the first goods loading rotating station to wait for the second picking trolley to be connected.

The second goods picking personnel push the second goods picking trolley to move in the corresponding walking channel according to the order information, take corresponding goods from the corresponding goods shelf and place the goods into the turnover box on the second goods picking trolley, after all the goods in charge of the second goods picking trolley are placed into the turnover box, the second goods picking trolley is pushed to the second goods delivery transfer station, the second goods delivery transfer station automatically takes the turnover box off the second goods picking trolley and conveys the turnover box to the second mobile robot, and the second mobile robot conveys the turnover box to the next goods delivery transfer station.

So, until after the last picking member puts all the remaining goods in the order into the turnover box on the final picking trolley, the final picking trolley is pushed to the final delivery transfer station, the final delivery transfer station automatically takes off the turnover box from the final picking trolley and conveys the turnover box to the final mobile robot, the turnover box is conveyed to the packing station by the final mobile robot for packing and delivering goods, or the turnover box is conveyed to the delivery conveyor belt by the final mobile robot, and then the turnover box is conveyed to the packing station by the delivery conveyor belt for packing and delivering goods.

Above-mentioned logistics storage center utilizes mobile robot to replace the conveyer belt, transports the turnover case between each intelligent transfer station, can command mobile robot to go to different intelligent transfer stations according to the order is nimble, and the conveying system has very big flexibility. In addition, the intelligent transfer station serves as a temporary storage place for the transfer boxes, so that the utilization rate of the mobile robots can be maximized, the number of the mobile robots is reduced, the efficiency is improved, and the investment cost is reduced.

In the logistics storage center, the structures of the loading transfer station and the unloading transfer station are basically the same, but the transfer directions of the turnover boxes are different, namely the running directions of the conveyor belts are different, for the loading transfer station, the turnover boxes are transferred from the picking trolley to the loading transfer station, and for the unloading transfer station, the turnover boxes are transferred from the unloading transfer station to the picking trolley. The following takes the delivery transfer station as an example, and specifically describes a specific structure of the intelligent transfer station.

As shown in fig. 2, the intelligent transfer station 700 includes a cart interface 710, a horizontal transfer unit 720, a bridge unit 730, and a robotic interface 740.

The cart interface 710 has an upper conveyor 711 and a lower conveyor 712 arranged above each other for transferring totes from the picking cart to the cart interface on either the upper rack or the lower rack of the picking cart.

And the horizontal conveying device 720 is used for conveying the turnover boxes.

And a bridge device 730 disposed between the cart interface device 710 and the horizontal conveying device 720, wherein one end of the bridge device 730 is hinged to the horizontal conveying device 720, and the other end of the bridge device 730 is overlapped with the order picking cart interface device 710, and the other end of the bridge device 730 is overlapped with the upper layer conveying belt 711 or the lower layer conveying belt 712 of the order picking cart interface device 710 by rotating the bridge device 730 relative to the horizontal conveying device 720, so that the turnover boxes on the upper layer conveying belt 711 or the lower layer conveying belt 712 can be selectively conveyed to the horizontal conveying device 720.

And a robot docking device 740 for transferring the containers transferred from the horizontal transfer device 720 to the mobile robot.

Specifically, as shown in fig. 3, the order picking cart docking device 710 includes a first frame 713, and an upper conveyor belt 711 and a lower conveyor belt 712 disposed one above the other on the first frame 713. The upper conveyor 711 and the lower conveyor 712 are provided with blocking rods 714 on both sides thereof. The upper layer conveyor belt 711 and the lower layer conveyor belt 712 are composed of a first conveyor belt and a second conveyor belt, the front end (inlet end) of the first conveyor belt is inclined downwards, the second conveyor belt is horizontally arranged and located behind the first conveyor belt, and after the picking trolley is pushed into the robot connection device, the front ends of the turnover boxes on the upper layer conveyor belt 711 and the lower layer conveyor belt 712 slightly tilt upwards, so that the whole bottom surface is enabled to fall on the first conveyor belt, and the turnover boxes can be more stably dragged to move. If the first conveyor belt is horizontal, the bottom surface of the turnover box is not completely attached to the first conveyor belt due to uneven ground, so that friction is reduced, slipping is caused, and conveying is affected.

The cart docking device 710 is provided with a first photoelectric sensor and a second photoelectric sensor, and is configured to detect whether a turnover box is present on a first conveyor belt of the upper conveyor belt 711 and the lower conveyor belt 712, and when a turnover box is detected, start the first conveyor belt and transfer the turnover box onto a second conveyor belt.

Preferably, the first conveyor belt and the second conveyor belt are separately driven, which can reduce power consumption.

The horizontal transfer device 720 includes a second frame and a third conveyor device disposed on the second frame.

As shown in fig. 4, the bridging device 730 includes a third frame 731 and a fourth conveyor belt device 732 disposed on the third frame 731, a rear end of the fourth conveyor belt device 732 is rotatably disposed at a rear end of the third frame 731 through a bridging spindle 733, a front end of the fourth conveyor belt device 732 is suspended, the bridging spindle 733 is connected to the stepping motor, and the stepping motor drives the fourth conveyor belt device 732 to rotate around the bridging spindle 733, so that the front end of the fourth conveyor belt device 732 is engaged with the upper conveyor belt 711 of the cart dock 710 or engaged with the lower conveyor belt 712.

The trolley docking device 710 is further provided with a third photoelectric sensor for detecting whether a turnover box is on the second conveyor belts of the upper conveyor belt 711 and the lower conveyor belt 712, and if only a turnover box is on the second conveyor belt of the upper conveyor belt 711, the stepping motor on the bridging device 730 is started to enable the front end of the fourth conveyor belt 732 to be lapped with the rear end of the second conveyor belt in the upper conveyor belt 711, so that the turnover box on the upper conveyor belt 711 is conveyed to the horizontal conveying device 720; if only the turnover box is detected on the second conveyor belt of the lower conveyor belt 712, the stepping motor on the bridging device is started to enable the front end of the fourth conveyor belt 732 to be overlapped with the rear end of the second conveyor belt of the lower conveyor belt 712, and the turnover box on the lower conveyor belt 712 is conveyed to the horizontal conveying device 720; if the upper conveyor belt 711 and the lower conveyor belt 712 both have turnover boxes, the fourth conveyor belt device 732 is overlapped with the upper conveyor belt 711 and the lower conveyor belt 712 in sequence, and the turnover boxes of the upper conveyor belt 711 and the lower conveyor belt 712 are sequentially conveyed to the horizontal conveying device 720.

As shown in fig. 5, the trolley docking device 710 and the bridging device 730 constitute a transfer station loading device.

As shown in fig. 6 and 7, the robot interface 740 includes a fourth frame 741 and a fifth transporter disposed on the fourth frame 741. The rear end of the fifth conveying device is inclined downwards, the mobile robot is positioned below the outlet end of the fifth conveying device, and the turnover box is conveyed to the mobile robot through the fifth conveying device. The fifth transferring device includes a fixing plate 742, and a timing belt 743, a timing transmission wheel, and a driving assembly provided on the fixing plate 742. The fixing plate 742 has a rear end inclined downward and a front end provided with a groove. The fixing plate 742 is provided with a square hole 7421, the left and right sides of the fourth frame 741 are provided with cross beams, and the first fixing rod 7422 fixes the fixing plate 742 on the fourth frame 741 through the square hole 7421. The front end of the fourth frame 741 is provided with a second fixing rod 7423 perpendicular to the fixing plate 742, and the second fixing rod 7423 is inserted into the groove and fixed to the fixing plate 742 by a T-shaped right-angle member and a screw. Limiting plates 7411 are arranged on the top surfaces of the left side and the right side of the fourth rack 741, and two ends of each limiting plate 7411 are arranged to be opened outwards and used for limiting the transfer box to be driven on the transfer station robot docking device 740.

The synchronous belt 743 is an endless belt, teeth are arranged on the outer circumferential surface of the belt at equal intervals, and the inner circumferential surface of the belt is smooth; the synchronous transmission wheel is arranged on the same side of the fixing plate 742 and comprises a plurality of first transmission wheels 744 and two second transmission wheels 745, the first transmission wheels 744 are in transmission connection with the outer peripheral surface of the synchronous belt 743, and tooth grooves matched with the teeth of the synchronous belt 743 are arranged on the outer peripheral surface of the first transmission wheels 744; the second transmission wheel 745 is in transmission connection with the inner peripheral surface of the synchronous belt 743, and the outer peripheral surface of the second transmission wheel is smooth; the inner periphery of the timing transmission wheel is rotatably coupled to the fixed plate 742 via a bearing and a bolt.

As shown in fig. 8, the driving assembly includes a driving shaft 746, and a plurality of fixed shaft sleeves 747 and a plurality of driving wheels 748 sleeved on the driving shaft 746, the driving shaft 746 is vertically disposed in a groove on the fixed plate 742, and a V-shaped elongated slot is disposed on a side surface of the driving shaft. The side of the fixing shaft sleeve 747 is provided with a connecting lug protruding outwards, and the transmission assembly is fixed on the fixing plate 742 and the fourth frame 741 through the connecting lug. The number of the driving wheels 748 is adapted to the number of the fifth device, and the driving wheels 748 include a first transmission portion 7481 and a second transmission portion 7482, a tooth groove adapted to the tooth of the synchronous belt 743 is formed in the outer circumference of the first transmission portion 7481, the second transmission portion 7482 is arranged on the top surface of the first transmission portion 7481, a fixing hole is radially formed in the side surface of the second transmission portion 7482, a screw is arranged in the fixing hole and meshed with the V-shaped long groove, the driving shaft 746 is connected with a driving motor arranged on the side surface of the fourth rack 741, and the driving wheels 748 are driven to synchronously rotate by the driving motor and the driving shaft 746.

The fifth transmission further comprises a tightening device 749 provided on the fixing plate, comprising:

a fixing portion 7491 fixed to the fixing plate 742 by a screw, a counter bore being provided on a top surface of the fixing portion 7491;

a sliding part 7492, a fixing plate 742 is provided with a sliding slot, and a fixing part 7491 is arranged on two sides of the fixing 742 plate through a bolt and the sliding slot and slides relative to the fixing part 7491 through a screw;

the tightening part 7493 includes a fixed shaft disposed on the sliding part 7492, and a bearing is sleeved on the fixed shaft and is in transmission connection with the inner periphery of the synchronous belt 743.

The intelligent transfer station 700 is further provided with a weighing module, a cargo label scanning module and an in-container cargo scanning module.

The weighing module is arranged on the horizontal conveying device 720, and can judge whether the commodities in the turnover box are complete according to the weight stabilizing result.

The cargo scanning module in the cargo box is a camera arranged above the horizontal conveying device 720, and the total volume of the commodities can be obtained by scanning the cargoes in the cargo box, so that the packaging boxes with corresponding specifications are distributed.

In the logistics storage center, the structure of the picking cart 800 is shown in fig. 9 and 10, the picking cart 800 includes a chassis 810, and an upper rack 820 and a lower rack 830 provided on the chassis 810, the upper rack 820 and the lower rack 830 are arranged at an upper and a lower interval, and are respectively used for carrying the turnover boxes 600, and each of the racks can carry a plurality of turnover boxes 600.

Four corners of the bottom surface of the chassis 810 are provided with 4 universal casters 811, respectively, so that the traveling direction can be changed arbitrarily.

Two first upright columns 812 are respectively arranged on the left side and the right side of the rear part of the underframe 810, two second upright columns 813 are arranged in front of the two first upright columns 812, and the lower ends of the first upright columns 812 and the second upright columns 813 are respectively fixed with the underframe 810. An upper layer cross beam 814 and a lower layer cross beam 815 are respectively arranged on the first upright 812 and the second upright 813 on each side, the upper layer cross beams 814 on the left and the right sides form an upper layer bracket 820, and the lower layer cross beams 815 on the left and the right sides form a lower layer bracket 830.

As shown in fig. 11, the turnover box 600 has a box body 611 with an open upper end, the left and right side walls of the box body 611 are respectively provided with a wing plate 612 arranged along the length direction thereof, the distance between two upper beams 814 in the upper layer support 820 and the distance between two lower beams 815 in the lower layer support 830 are adapted to the width of the box body 611, the wing plate 612 is supported on the upper beams 814 or the lower beams 815, and the wing plate 612 can slide along the upper beams 814 or the lower beams 815.

After the tote 600 is placed, a gap is formed between the bottom surface of the tote on the upper rack 820 and the top surface of the tote 600 on the lower rack 830, which gap is capable of accommodating the upper conveyor belt 711 on the cart interface 710, and a gap is also formed between the bottom surface of the tote 600 on the lower rack 830 and the top surface of the chassis 810, which gap is capable of accommodating the lower conveyor belt 712 on the cart interface 710.

When the picking trolley 800 is used, the picking trolley 800 is firstly pushed to one end of the trolley docking device 710, the picking trolley 800 is continuously pushed, the bottom surface of the turnover box 600 on the upper layer support 820 falls on the upper layer conveyor belt 711, meanwhile, the bottom surface of the turnover box 600 on the lower layer support 830 falls on the lower layer conveyor belt 712, the upper layer conveyor belt 711 is started, the turnover box 600 on the upper layer support 820 can be dragged to be separated from the picking trolley 800, and the lower layer conveyor belt 712 is started, so that the turnover box 600 on the lower layer support 830 can be dragged to be separated from the picking trolley.

The rear sides of the upper-layer cross beam 814 and the lower-layer cross beam 815 are provided with closing plates 816, and a space enclosed by the first upright 812 and the second upright 813 is provided with a plurality of layers of stair boards 817 from bottom to top, so that a ladder is formed at the rear part of the goods picking trolley 800, and goods pickers can limit goods on the upper layer of the goods shelf by climbing the ladder.

The length of the stair boards on the upper layer is smaller than that of the stair boards on the lower layer, so that an area for placing a tool box is formed on the lower layer of stair boards below the upper layer of stair boards.

The two first upright columns 812 are respectively provided with a cart handrail 818 on the rear side surface, the cart handrail 818 is U-shaped, the opening end is fixed with the first upright column 812, and the first upright column 812 inclines towards the front from the bottom to the top, so that the picking staff can push the picking cart 800 more conveniently.

A temporary storage plate 821 is arranged above the first upright 812, and the bottom surface of the temporary storage plate 818 is fixed with the first upright 812 and the second upright 813 by a support rod 822. The support rod 822 is inclined from bottom to top to the front, so that the temporary storage plate 821 is substantially located right above the picking cart 800, and after goods are placed, the center of gravity of the temporary storage plate is substantially located at the center of the picking cart 800, thereby increasing stability.

Obstacle avoidance wheels 819 are arranged on the left side and the right side of the front end of the bottom frame 810 respectively, wheel shafts of the obstacle avoidance wheels 819 are vertically fixed on the bottom surface of the bottom frame 810, and wheel bodies of the obstacle avoidance wheels 819 are made of rubber materials and can rotate around the wheel shafts. The outer circumferential surface of the obstacle avoidance wheel 819 protrudes from the front end surface and the side surface of the base chassis 810. Thus, when an obstacle is encountered, the obstacle avoidance wheel 819 is touched firstly, and the elasticity of the obstacle avoidance wheel 819 enables the picking trolley 800 to change the direction, so that the chassis 810 is prevented from directly colliding with the obstacle to generate strong vibration, and the goods in the turnover box are prevented from being damaged.

The utility model provides a pick goods handcart, rear wheel are equipped with double round brake equipment, and two rear wheels can be the synchronous braking simultaneously, and double round brake equipment includes footboard subassembly and brake subassembly.

As shown in fig. 12, the pedal assembly includes a pedal 841, two ends of which are respectively provided with a connecting rod 842, and the other end of the connecting rod 842 is fixed with a first rotating shaft 843. The first rotating shaft 843 is prism-shaped and is used for driving the brake assembly to clamp the wheel body of the rear wheel. In this embodiment, the first rotating shaft 843 is a hexagonal prism. The pedal 841 is composed of a pedal shaft and a shaft sleeve sleeved on the pedal shaft, and the shaft sleeve is made of rubber and can rotate on the pedal shaft.

As shown in fig. 13 and 14, the brake assembly includes a cam 851 and a cam seat 852, wherein a second rotating shaft 853 is respectively protruded from both side surfaces of the cam 851, the second rotating shaft 853 is axially provided with a shaft hole 854, the shaft hole 854 is adapted to the first rotating shaft 843, and the cam 851 can rotate along with the rotation of the first rotating shaft 843.

The cam seat 852 is formed by oppositely combining two half bodies, and the upper end is fixed by a clamp spring 855. The second shaft 853 is rotatably disposed in the cam seat 852. Two pin shafts 856 are arranged at the upper end of the cam seat 852, and the pin shafts 856 are perpendicular to the axis of the cam seat 852.

As shown in fig. 15, the outer circumferential profile of the cam 851 is composed of a protrusion 8511 and a recess 8512, a recess 8513 is formed in the middle of the protrusion 8511, two spaced grooves 8514 are formed at one end of the protrusion 8511, and the grooves 8514 are adapted to the pin 856.

Referring to fig. 12, 13 and 14, the upper end of the universal caster 811 is provided with a connecting tube 861, the cam seat 852 is inserted into the upper end of the connecting tube 861 from top to bottom, the lower end of the connecting tube 861 is provided with an extending shaft, a locking shaft 862 is arranged in a shaft hole of the extending shaft, the upper end of the locking shaft 862 is provided with a flange, a spring 863 is sleeved below the flange, the upper end of the locking shaft 862 abuts against the cam 851, and the lower end of the locking shaft 862 is opposite to the wheel body 864 of the wheel.

When a user steps on the pedal 841, the first rotating shaft 843 rotates along with the pedal 841, the first rotating shaft 843 drives the cam 851 to rotate, the protrusion 8511 pushes the locking shaft 862 downwards, and when the pin 856 enters the groove 8514, the lower end of the locking shaft 862 abuts against the outer circumferential surface of the wheel body 864, so that the wheel body 864 is locked. When pedal 841 is released, locking shaft 862 springs upward under the action of spring 863 and moves its lower end away from wheel 864 so that wheel 864 can rotate freely.

The utility model has the advantages of as follows:

(1) the system can be flexibly configured according to orders, and can meet the requirements of order receiving and processing, goods assembly, special package customization, subsequent domestic and international delivery and the like.

(2) Save a large amount of artifical walking mileage, shorten work walking distance, can respond to the order rapidly and save precious time.

The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.

Claims (9)

1. A brake apparatus, comprising:

the pedal assembly comprises a pedal, two ends of the pedal are respectively provided with a connecting rod, the other end of the connecting rod is fixedly provided with a first rotating shaft, and the first rotating shaft is prismatic and used for driving the brake assembly;

the brake assembly comprises a cam and a cam seat, wherein two side surfaces of the cam are respectively provided with a second rotating shaft in a protruding mode, the second rotating shaft is provided with a shaft hole along the axial direction, the shaft hole is matched with the first rotating shaft, and the cam can rotate along with the rotation of the first rotating shaft; a concave pit is arranged in the middle of the cam;

the cam seat is formed by oppositely combining two half bodies, the upper end of the cam seat is fixed through a clamp spring, and the second rotating shaft is rotatably arranged in the cam seat; and a locking shaft is arranged in the cam seat, the upper end of the locking shaft is abutted against the concave pit, and a spring is sleeved at the bottom end of the locking shaft.

2. The brake apparatus as claimed in claim 1, wherein the cam holder has two pins at an upper end thereof, the two pins being disposed perpendicular to an axis of the cam holder, the cam having two grooves formed in an outer circumferential surface thereof, the pins being fitted into the grooves.

3. A trolley for a logistics system comprises an underframe and wheels arranged on the underframe, and is characterized in that an upper layer support and a lower layer support are arranged on the underframe, the upper layer support and the lower layer support are arranged at intervals and are respectively used for bearing turnover boxes, and the wheels are provided with brake devices according to claims 1 or 2.

4. The cart for logistics system of claim 3, wherein the wheel has a connection pipe at an upper end thereof, the cam shaft is inserted into the connection pipe from bottom to top, the connection pipe has an extension shaft at a lower end thereof, and the locking shaft is disposed in the shaft hole of the extension shaft and has a lower end opposite to the wheel body of the wheel.

5. The trolley for logistics system of claim 3, wherein a hand brake is provided on the trolley.

6. The trolley for the logistics system according to claim 3, wherein two first upright columns are respectively disposed on the left and right sides of the rear portion of the underframe, a second upright column is disposed in front of the first upright column, the bottom ends of the first upright column and the second upright column are fixed to the underframe, an upper cross beam and a lower cross beam are respectively disposed on each of the first upright column and the second upright column, the upper cross beams on the left and right sides form the upper support, and the lower cross beams on the left and right sides form the lower support.

7. The trolley for logistics system according to claim 6, wherein a temporary storage plate is provided above the first upright, a bottom surface of the temporary storage plate is fixed to the first upright and the second upright through a stay bar, and the stay bar is inclined from bottom to top to front.

8. The trolley for logistics system according to claim 6, wherein a plurality of stair plates are provided from bottom to top in the space surrounded by the first upright and the second upright, thereby forming a ladder at the rear of the trolley for logistics system.

9. The cart for logistics system of claim 8, wherein a tool box is provided between said stair boards for placing a tool for picking up goods.

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