CN108545387B

CN108545387B - Intelligent three-dimensional cross type express logistics sorting system with small occupied area

Info

Publication number: CN108545387B
Application number: CN201810240863.4A
Authority: CN
Inventors: 沈宇锋; 邹成意
Original assignee: Shen Zhejiang Mechanical Science And Technology Ltd Of Shaking
Current assignee: Shanghai Yufeng Youdao Intelligent Technology Co.,Ltd.
Priority date: 2018-03-22
Filing date: 2018-03-22
Publication date: 2020-03-17
Anticipated expiration: 2038-03-22
Also published as: CN108545387A

Abstract

The invention discloses an intelligent three-dimensional crossing express logistics sorting system with small occupied area, which comprises a sorting conveyor belt arranged on a rack and a plurality of sorting trolleys arranged on the sorting conveyor belt, a plurality of sorting openings are respectively arranged at the two sides of the sorting conveyor belt, the sorting conveyor belt comprises a left long circular sorting track and a right long circular sorting track, the sorting tracks are provided with an upper horizontal track and a lower horizontal track, and a semicircular conversion track which is used for connecting the upper horizontal track and the lower horizontal track at the front end and the rear end, and the left and right sorting tracks are arranged in a staggered manner from front to back, a front sliding body is arranged at the front end of one side of the sorting trolley and is connected to the sorting track close to the front in a sliding manner, a rear sliding body is arranged at the rear end of the other side of the sorting trolley and is connected to the sorting track close to the rear in a sliding manner, and the distance between the front sliding body and the rear sliding body in the front-back direction is equal to the staggered distance between the two sorting tracks. The invention can realize the three-dimensional arrangement of the sorting track, and the sorting trolley can keep a horizontal state, thereby occupying small area.

Description

Intelligent three-dimensional cross type express logistics sorting system with small occupied area

Technical Field

The invention relates to the technical field of logistics sorting systems, in particular to an intelligent three-dimensional crossed express logistics sorting system with small occupied area.

Background

Along with the continuous development of internet economy, the logistics industry is entering a rapid development period, correspondingly, the rapid and accurate sorting of packages becomes a basic requirement of the logistics industry, the conventional logistics sorting system is generally that a plurality of sorting tracks with heads and tails closed into a ring shape are arranged on the plane in a logistics warehouse, a plurality of sorting ports corresponding to different addresses are arranged at intervals beside each sorting track, a plurality of sorting trolleys are arranged at intervals on each sorting track, each sorting trolley is provided with a walking motor for driving each sorting trolley to walk on each sorting track and an unloading device driven by each sorting motor, a sliding contact line is arranged below each walking trolley, and each sorting trolley is provided with a corresponding current collector so as to provide a power supply for each sorting trolley. When the sorting trolley is positioned at the initial position of the sorting track, the bar codes of the packages can be scanned firstly, then the packages are placed into the sorting trolley, and the address information obtained by scanning is correspondingly input into the controller of the sorting trolley. Then the sorting trolley can rapidly move to the corresponding sorting opening position beside the sorting track according to the input address information, and then a sorting motor on the sorting trolley drives an unloading mechanism on the sorting trolley to act, so that the parcels turn over to enter the sorting opening, and the parcels are automatically sorted. The sorting carriages are then wound back along the sorting track to the starting position to await the next sort.

For example, the publication number "an efficient logistics sorting system based on RFID" disclosed in the chinese patent literature is CN105903679A, which includes a sorting machine, a cloud platform, a sorting data acquisition module and a sorting error correction module, the conveying belt of the sorting machine is provided with a plurality of sorting branches, and each sorting branch sorts the goods to the destination and the sorting branch; the sorting data acquisition module is arranged at the starting point of a conveyor belt of the sorting machine, wherein, the first RFID reader is used for reading the electronic label attached on the goods to obtain the destination information of the goods, the first GPRS communication unit is used for sending the goods identification information to the cloud platform, the sorting error correction module is distributed on each sorting branch, wherein the second RFID reader reads the electronic tags of the sorted goods, the second GPRS communication unit sends the identification information of the goods to the cloud platform, and the cloud platform is used for checking the condition and progress of logistics sorting according to the received department identification information. The invention can check the sorted goods through the second RFID reader and the second GPRS communication unit, thereby improving the accuracy of logistics sorting and avoiding sorting errors.

However, the existing logistics sorting system has the following defect that in order to ensure that the sorting trolley is always kept in an upward state, the sorting tracks or the sorting branches which are closed end to end in the sorting system are arranged in a plane, so that the occupied area of the sorting tracks or the sorting branches is large.

Disclosure of Invention

The invention aims to solve the problem that the existing logistics sorting system is large in occupied area, and provides an intelligent three-dimensional cross express logistics sorting system with small occupied area, which can realize three-dimensional arrangement of sorting tracks and avoid side turning of a sorting trolley.

In order to achieve the purpose, the invention adopts the following technical scheme: an intelligent three-dimensional crossed express logistics sorting system with less occupied area comprises a sorting conveyor belt arranged on a rack and a plurality of sorting trolleys arranged on the sorting conveyor belt at intervals, wherein the rear end of the sorting conveyor belt is a driving end, the front end of the sorting conveyor belt is a driven end, a plurality of sorting ports are respectively arranged on two sides of the sorting conveyor belt, a discharging mechanism capable of enabling parcels to enter the corresponding sorting ports is arranged on each sorting trolley, the sorting conveyor belt comprises a left long circular sorting track and a right long circular sorting track, the sorting tracks are located in a vertical plane, so that each sorting track is provided with an upper horizontal track, a lower horizontal track and a semicircular conversion track, the front ends of the upper horizontal track and the lower horizontal track are connected, the left horizontal sorting track and the right horizontal sorting track are arranged in a staggered mode, a front sliding body is arranged at the front end of one side of each sorting, the rear end of the other side of the sorting trolley is provided with a rear sliding body which is connected to the sorting track at the back in a sliding manner, and the distance between the front sliding body and the rear sliding body in the front-back direction is equal to the dislocation distance of the two sorting tracks.

Different from the prior art, the sorting trolley in the sorting system of the invention adopts the sorting conveyor belt to convey, wherein the sorting trolley can be driven by a driving chain, or the rollers on the front sliding body and the rear sliding body can be directly driven by a motor arranged on the sorting trolley, so that the sorting trolley moves circularly along the sorting conveyor belt. Because two letter sorting tracks of letter sorting conveyer belt are the long circular track of vertical arrangement, consequently can form two upper and lower horizontal tracks, that is to say, letter sorting dolly can form upper and lower two-layer three-dimensional conveying to can show the reduction area. It is known in the prior art that the disintegrating carriages are provided on both sides with front and rear sliding bodies, such as rollers, which are slidably connected to the rails, so that the opening of the sorting carriage is always oriented in the normal direction of the sorting rail. When the sorting trolley is positioned on the horizontal rail on the upper layer, the opening of the sorting trolley faces upwards; when the decomposing trolley enters the semicircular conversion track at the front end, the opening of the decomposing trolley is gradually inclined; when the sorting trolley is positioned on the horizontal rail of the lower layer, the opening of the sorting trolley faces downwards. Like this, the parcel of placing in the letter sorting dolly can topple, so the letter sorting system of today can't adopt three-dimensional arrangement structure, but can only adopt plane arrangement structure to make the letter sorting dolly be in the state that the opening faces upwards all the time.

The invention creatively arranges a sliding body on the left side and the right side of the sorting trolley respectively, and the two sliding bodies are staggered from front to back to form a front sliding body and a rear sliding body; correspondingly, the left and right sorting tracks are arranged in a front-back staggered mode, and the distance between the front sliding body and the rear sliding body in the front-back direction is equal to the staggered distance between the two sorting tracks. Thus, when the sorting trolley moves on the horizontal rail on the upper layer, the front and rear sliding bodies on the two sides of the sorting trolley can keep the sorting trolley in a horizontal state, and the opening of the sorting trolley faces upwards; when the front sliding body of the sorting trolley enters the switching track of the front sorting track, the rear sliding body on the other side of the sorting trolley also just enters the switching track of the rear sorting track, and the sorting trolley still keeps a horizontal state with an upward opening; when the front sliding body of the sorting trolley enters the horizontal rail at the lower layer of the front sorting rail, the rear sliding body at the other side of the sorting trolley also just enters the horizontal rail at the lower layer of the rear sorting rail, and the sorting trolley still keeps the horizontal state with the upward opening. Therefore, the sorting system can realize the three-dimensional arrangement of the sorting tracks under the condition of ensuring that the sorting trolley is always in a horizontal state with an upward opening, thereby effectively reducing the floor area of the sorting system, being beneficial to reducing the cost and improving the efficiency.

Preferably, the sorting track is provided with a driving chain, the driving end of the sorting conveyor belt is provided with a driving chain wheel meshed with the driving chain, the driven end of the sorting conveyor belt is provided with a driven chain wheel meshed with the driving chain, the two driving chain wheels meshed with the left driving chain and the right driving chain are associated with the synchronous driving mechanism, the front sliding body and the rear sliding body are respectively connected with the driving chain on the corresponding side, and when the synchronous driving mechanism drives the two driving chain wheels to synchronously rotate, the sorting trolley can be driven by the left driving chain and the right driving chain to move along the sorting conveyor belt.

The chain transmission is suitable for long-distance power transmission, and the movement of the sorting trolley is driven by the driving chain to provide power, so that the sorting trolley can drive the unloading mechanism to move through the vehicle-mounted storage battery to enable the packages to enter the sorting ports corresponding to the addresses, the power supply system of the sorting trolley is facilitated to be simplified, and the running reliability of the sorting trolley is improved. And the two driving chain wheels realize synchronous rotation through a synchronous driving mechanism, so that the stable movement of the sorting trolley on the sorting conveying belt can be ensured.

Preferably, a tensioning motor controlled by a controller and a forward moving rack capable of moving forward and backward are arranged at the front end of the rack, the driven chain wheels are arranged on the forward moving rack, the forward moving rack is connected with the tensioning motor through a transmission mechanism, and when the tensioning motor drives the forward moving rack to move forward through the transmission mechanism, the left driven chain wheel and the right driven chain wheel synchronously move forward, so that the left driving chain and the right driving chain are synchronously tensioned.

After the sorting system operates for a certain time, the driving chains can generate certain stretching, and the tensioning motor can be started at the moment, so that the front moving rack is driven by the transmission mechanism to move forwards, the left driving chain and the right driving chain are synchronously tensioned, and the sorting trolley can be ensured to always keep stable and reliable movement.

Preferably, the transmission mechanism comprises a front worm connected with a motor shaft of the tensioning motor and a front worm wheel arranged at the front end of the frame and meshed with the front worm, a front threaded sleeve is arranged on the forward moving frame, and a front lead screw in threaded connection with the front threaded sleeve is coaxially arranged on a front worm wheel shaft.

When the tensioning motor rotates, the front worm can be driven to rotate, so that the front worm wheel is driven to rotate, the front screw rod rotates at the moment, and the front moving rack is driven to stably move through the front screw sleeve, so that the left and right driving chains are synchronously tensioned. The worm gear transmission mechanism has a great transmission ratio and a reliable self-locking function, so that on one hand, the moving precision of the front moving rack can be ensured, and simultaneously, the reliable positioning of the front moving rack after moving can be ensured.

Therefore, the invention has the following beneficial effects: the occupied area is small, the three-dimensional arrangement of the sorting tracks can be realized, the side turning of the sorting trolley is avoided, and the driving chain is always kept in a tensioning state.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of a sorting track structure in the direction a in fig. 1.

Fig. 3 is a schematic structural view of a sorting trolley.

Fig. 4 is a side view of the active end.

Fig. 5 is a schematic structural view of the synchronous drive mechanism.

Fig. 6 is a schematic view of the driven end tensioning mechanism.

Fig. 7 is a schematic structural view of the active end tensioning mechanism.

Fig. 8 is a schematic view of the front worm gear.

Fig. 9 is a schematic diagram of a sorting track structure in the direction B in fig. 1.

Fig. 10 is a schematic view of the connection structure of the sorting trolley with the horizontal rail and the horizontal rib.

Fig. 11 is a schematic structural view of the switching door and the lock mechanism.

In the figure: 1. the sorting machine comprises a machine frame 2, a sorting conveyor belt 21, a driving end 22, a driven end 23, a sorting track 231, a horizontal track 232, a conversion track 24, a driving sprocket 25, a driven sprocket 26, a horizontal rib 27, a conversion rib 28, a front shifting rib 29, a rear conversion rib 3, a sorting trolley 31, a front sliding body 32, a rear sliding body 33, a front sliding pin 34, a rear sliding pin 4, a driving motor 41, a linkage shaft 42, a driving sprocket 43, a synchronous sprocket 44, a first transition sprocket 45, a second transition sprocket 46, a third transition sprocket 5, a tensioning motor 50, a front motor frame 51, a rear motor frame 52, a front worm 521, a central shaft sleeve 522, an outer gear ring 523, a web 524, a strain shaft sleeve 525, a fan-shaped sheet 526, a containing groove 53, a front worm gear 54, a front screw sleeve 55, a rear screw sleeve 56, a fan-shaped sheet 526, a front, The device comprises a front lead screw 57, a rear lead screw 58, a rear worm 59, a rear worm wheel 6, a resistance strain gauge 7, a switching door 71, a gear sleeve 8, a shaft pin 81, a rack 9, a lock pin 91, a shaft pin through hole 92 and a return spring.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

As shown in fig. 1 and fig. 2, an intelligent three-dimensional cross express logistics sorting system with small floor space is suitable for automatically sorting and classifying collected parcels according to destinations. The sorting machine comprises a rack 1 and a sorting conveyor belt 2 arranged on the rack, wherein a plurality of rectangular sorting trolleys 3 are arranged on the sorting conveyor belt at equal intervals, the rear end of the sorting conveyor belt is a driving end 21, and the front end of the sorting conveyor belt is a driven end 22. The sorting conveyor includes left and right oblong sorting tracks 23 located in a vertical plane such that the sorting tracks have upper and lower horizontal tracks 231 and semicircular transition tracks 232 connecting the front ends of the upper and lower horizontal tracks and semicircular transition tracks connecting the rear ends of the upper and lower horizontal tracks. Of course, the left and right oblong sorting tracks should be parallel to each other so that the sorting carriages circulate on the sorting tracks. It can be understood that the left and right sides of the sorting conveyor belt are respectively provided with a plurality of sorting openings (not shown in the figure) which are arranged at intervals along the front-back direction, and the sorting trolley is provided with a discharging mechanism which can lead the packages to enter the corresponding sorting openings. When needing to sort the parcel, we can sweep the sign indicating number to the bar code on the parcel that needs to sort earlier in the mode of sweeping the sign indicating number sorting device or artifical and sweeping the sign indicating number, and the parcel after sweeping the sign indicating number is put into and is stopped in the letter sorting dolly on the letter sorting conveyer belt initiative end, and this letter sorting dolly can accept to sweep the address information that the sign indicating number obtained this moment. The sorting trolley can then be driven by a drive chain arranged in the sorting track, or can be driven by a motor arranged on the sorting trolley to move forwards along the sorting track. When the sorting trolley reaches the sorting opening position corresponding to the code scanning information, the unloading mechanism enables the packages on the sorting trolley to turn over laterally and enter the sorting opening to be concentrated.

It should be noted that the self-contained motor and the corresponding driving mechanism drive the sorting trolley to move, and the unloading mechanism arranged on the sorting trolley belong to the prior art, and are not described in detail herein. In addition, the sorting dolly accessible also can realize removing the power supply through the wiping line that sets up on the letter sorting track from the battery power supply of taking to commodity circulation letter sorting system itself needs to have a controller, so that when the letter sorting dolly reachs the letter sorting mouth position, the controller can make the sorting dolly park, and control discharge mechanism action and deliver the parcel into in the letter sorting mouth.

In order to ensure that the sorting trolley is always kept in a horizontal state on the sorting track, the left sorting track is required to be arranged close to the rear, and the right sorting track is arranged close to the front, so that the two sorting tracks are arranged in a staggered mode from front to back. Further, as shown in fig. 3, a front sliding body 31 is rotatably provided at the front end of the right side of the sorting cart, the front sliding body is slidably connected to the sorting rail on the right side, a rear sliding body 32 is rotatably provided at the rear end of the left side of the sorting cart, the rear sliding body is slidably connected to the sorting rail on the left side, and the distance between the front and rear sliding bodies in the front-rear direction is equal to the offset distance between the two sorting rails. In the present embodiment, the driving end is set as the rear side, the driven end is set as the front side, and the left side and the right side are determined accordingly.

When the sorting trolley moves forwards on the horizontal rail on the upper layer, the axes of the front sliding body and the rear sliding body on the two sides of the sorting trolley are in a horizontal state and are arranged along the left-right direction, namely, the axes of the front sliding body and the rear sliding body are kept parallel to each other at the moment, so that the sorting trolley can not rotate left and right and can not rotate front and rear, and the sorting trolley can be kept in a horizontal state and has an upward opening. When the front sliding body of the sorting trolley enters the switching track of the right sorting track, the rear sliding body on the left side of the sorting trolley also just enters the switching track of the left sorting track, and the sorting trolley at the moment still keeps a horizontal state with an upward opening and gradually descends. When the front sliding body on the right side of the sorting trolley enters the horizontal rail on the lower layer of the sorting rail on the right side, the rear sliding body on the small left side of the sorting trolley also just enters the horizontal rail on the lower layer of the sorting rail behind, and the sorting trolley still keeps the horizontal state with the upward opening and gradually moves backwards. Therefore, the sorting system can realize the three-dimensional arrangement of the sorting tracks under the condition of ensuring that the sorting trolley is always in a horizontal state with an upward opening, thereby effectively reducing the floor area of the sorting system, being beneficial to reducing the cost and improving the efficiency.

It will be appreciated that the discharge mechanism can be actuated to deliver the parcels into the lateral sortation openings whether the sortation cart is moved forward or backward. Therefore, the arrangement distance between the sorting ports on the two sides of the sorting track in the front-back direction can be reduced as much as possible, so that the length of the sorting track is further shortened, the occupied area of a sorting system is reduced, and the sorting speed and efficiency are improved.

In order to simplify the structure of the sorting trolley, the sorting tracks on the left and right sides are respectively provided with a driving chain which is closed in a ring shape, the front sliding bodies and the rear sliding bodies are respectively connected with the driving chain on one corresponding side, the driving end of the sorting conveyor belt is provided with a driving chain wheel 24 meshed with the driving chain, the driven end of the sorting conveyor belt is provided with a driven chain wheel 25 meshed with the driving chain, and the two driving chain wheels are associated with a synchronous driving mechanism. Therefore, when the synchronous driving mechanism drives the left driving chain wheel and the right driving chain wheel to synchronously rotate, the left driving chain and the right driving chain can drive the sorting trolley to move along the sorting conveying belt. Correspondingly, the sorting trolley can drive the unloading mechanism to act through the vehicle-mounted storage battery so that the packages enter the sorting opening corresponding to the addresses, and therefore the power supply system of the sorting trolley is facilitated to be simplified, and the running reliability of the sorting trolley is improved.

As shown in fig. 4 and 5, the synchronous driving mechanism of the present invention includes a driving motor 4 and a linkage shaft 41 arranged in the left-right direction, a driving sprocket 42 is disposed on a motor shaft of the driving motor, a synchronous sprocket 43 is coaxially disposed on the left side of the left driving sprocket, a synchronous sprocket is coaxially disposed on the right side of the right driving sprocket, a first transition sprocket 44 is disposed on the right end of the linkage shaft, a second transition sprocket 45 and a third transition sprocket 46 are disposed side by side on the left end of the linkage shaft, the driving sprocket and the second transition sprocket are connected by a transmission chain, the third transition sprocket and the left synchronous sprocket are connected by a transmission chain, and the first transition sprocket is connected with the right synchronous sprocket by a transmission chain.

When the driving motor works, the second transition chain wheel is driven to rotate by the driving chain wheel, so that the first transition chain wheel and the third transition chain wheel at two ends are driven to rotate by the universal driving shaft, and the driving chain wheels at the left side and the right side are driven to rotate by the synchronous chain wheel, so that the sorting trolley is driven to move stably by the driving chain on the left sorting track and the right sorting track synchronously.

In addition, as shown in fig. 6, a tensioning motor 5 controlled by a controller and a forward moving rack 50 capable of moving back and forth can be arranged at the front end of the rack, a driven chain wheel at the driven end of the sorting conveyor belt is arranged on the forward moving rack, and the forward moving rack is connected with the tensioning motor through a transmission mechanism. When the sorting system runs for a certain time, the driving chains can gradually extend and loosen, at the moment, the tensioning motor can be started, the tensioning motor drives the front moving rack to move forwards through the transmission mechanism, and therefore the left driven chain wheel and the right driven chain wheel are driven to move forwards synchronously, and the left driving chain and the right driving chain are tensioned synchronously. Specifically, the transmission mechanism arranged between the tension motor and the front moving frame comprises a front worm 52 connected with a motor shaft of the tension motor, a front worm wheel 53 arranged at the front end of the frame and meshed with the front worm, and a front screw sleeve 54 arranged on the front moving frame, wherein a front lead screw 56 in threaded connection with the front screw sleeve is coaxially arranged on a worm wheel shaft of the front worm wheel. When the tensioning motor rotates, the front worm can be driven to rotate, so that the front worm wheel is driven to rotate, the front screw rod rotates at the moment, and the front moving rack is driven to stably move through the front screw sleeve, so that the left and right driving chains are synchronously tensioned.

In addition, a rear worm 58, a rear worm wheel 59 engaged with the rear worm, and a rear moving rack 51 capable of moving back and forth can be arranged at the rear end of the rack, and accordingly, a driving sprocket and a synchronous driving mechanism are arranged on the rear moving rack so as to facilitate the whole movement. The rear moving frame is further provided with a rear threaded sleeve 55, and a worm wheel shaft of the rear worm wheel is provided with a rear screw 57 in threaded connection with the rear threaded sleeve. Preferably, the worm shafts of the rear worm and the front worm are respectively provided with chain wheels, and a transmission chain is arranged between the two chain wheels, so that the tensioning motor is associated with the rear worm.

When the tensioning motor starts, on the one hand, the front moving rack is driven to move forwards, on the other hand, the rear screw rod is driven to rotate through the rear worm and the rear worm wheel, so that the rear moving rack is driven to move backwards through the rear screw sleeve, the front moving rack and the rear moving rack can synchronously move for the same distance in opposite directions, tensioning of a driving chain is achieved, the center of a sorting conveying belt can be kept unchanged all the time, and the accuracy of delivering packages into a sorting opening by using the sorting trolley is guaranteed.

Further, as shown in fig. 8, the front worm wheel of the present invention includes a center hub 521 key-connected to a worm wheel shaft, an outer ring gear 522 engaged with the front worm, and a web 523 integrally connected between the center hub and the outer ring gear, and a resistance strain gauge 6 is bonded to one side of the web, and the resistance strain gauge is electrically connected to a controller.

When the controller starts the tensioning motor to tension the driving chain, the spoke plate of the front worm wheel generates torque to deform, and the resistance strain gauge generates an electric signal corresponding to the torque. When the tension of the driving chain reaches a set value, the electric signal generated by the resistance strain gauge synchronously reaches the set value, and the controller can stop the tensioning motor. Accordingly, when the drive chain is gradually loosened and the tension force is reduced, the torque applied to the web of the front worm wheel is gradually reduced, and the electric signal of the resistance strain gauge is correspondingly reduced. When the electric signal of the resistance strain gauge drops to a set value, the controller controls the tensioning motor to work, so that the automatic tensioning of the driving chain can be realized, and the tensioning force of the driving chain is ensured to be maintained in a proper interval.

To accurately control the tension of the drive chain, a strain collar 524 may be keyed to the worm gear shaft of the front worm gear, against the central collar, with radially extending scallops 525 on the outside of the strain collar. A containing groove 526 is formed in the side face, close to the strain shaft sleeve, of the web of the front worm wheel, and the fan-shaped piece is rotatably located in the containing groove, so that the surface of the fan-shaped piece is flush with the side face of the web. Of course, the fan-shaped piece can be provided with a step-shaped bend so as to be positioned in the accommodating groove. One end of the resistance strain gauge is bonded to the surface of the segment, and the other end is bonded to the side of the web that is flush with the segment. Like this, when worm wheel shaft drove preceding worm wheel and rotates, the axle sleeve that meets an emergency, fan-shaped piece and worm wheel shaft synchronous revolution, and preceding worm wheel receives the effect of load, and its radials can form a dislocation with the fan-shaped piece under the effect of load moment, and the resistance foil gage at this moment receives a linear tensile stress to can form simple linear relation between the signal of telecommunication of the moment that makes preceding worm wheel received and resistance foil gage, and then be favorable to the accurate control of controller to drive chain tensile force.

In order to improve the stability of the sorting trolley during moving, as shown in fig. 2, 3 and 9, a rear sliding pin 34 may be provided at the rear end of the right side of the sorting trolley corresponding to the rear sliding body, and a front sliding pin 33 may be provided at the front end of the left side of the sorting trolley corresponding to the front sliding body. Correspondingly, the outer edges of the inner sides of the left horizontal rail and the right horizontal rail are respectively provided with a horizontal rib 26, wherein the inner side of the front end of the right sorting rail is provided with a conversion rib 27 connected with the horizontal rib of the side, the conversion rib is semicircular, and the shape of the conversion rib corresponds to the shape of the conversion rail of the front side of the left sorting rail. Similarly, the inner side of the rear end of the left sorting track is provided with a conversion rib connected with the horizontal rib of the left sorting track, the conversion rib is semicircular, and the shape of the conversion rib corresponds to the shape of the conversion track at the rear side of the right sorting track. Furthermore, the rear end of the right sorting track is provided with a rear transfer rib 29 connected with the horizontal rib of the side, and the shape of the rear transfer rib corresponds to the transfer track of the rear side of the left sorting track. The front end of the left sorting track is provided with a front shifting edge 28 connected with the horizontal rib of the left sorting track, and the shape of the front shifting rib corresponds to the shape of the front shifting track of the right sorting track. In this way, the long circular positioning flanges formed by the upper and lower horizontal flanges, the front conversion flange at the front end and the conversion flange at the rear end are formed on the inner side of the left sorting track, and the long circular positioning flanges formed by the upper and lower horizontal flanges, the front conversion flange and the rear conversion flange at the rear end are formed on the inner side of the right sorting track. In addition, an opening allowing the front sliding body and the rear sliding body to pass through is arranged at the junction of the horizontal flanges of the two positioning flanges and the conversion flange, and a switching door 7 for blocking the opening is rotatably arranged at the opening. Of course, a locking mechanism for switching the switching door between the closed state and the open state is also required.

It should be noted that the axes of the front and rear sliding pins and the axes of the front and rear sliding bodies are horizontally arranged in the left-right direction, and the lengths of the front and rear sliding pins are smaller than the lengths of the front and rear sliding bodies, so that the front and rear sliding pins are abutted against the inner sides of the positioning ribs on the corresponding sides, and the front and rear sliding bodies pass over the positioning ribs and are connected to the driving chain, thereby the sorting trolley is reliably positioned at four points.

When the driving chain drives the sorting trolley to move forwards on the horizontal rail on the upper layer of the sorting rail, the front sliding pin and the rear sliding pin are respectively attached to the corresponding horizontal flanges, and the sorting trolley at the moment forms four-point positioning, so that the moving stability of the sorting trolley can be ensured. When the front sliding body on the right side of the sorting trolley moves to the junction of the horizontal flange on the right side and the conversion flange, the front sliding body firstly triggers the locking mechanism to push the switching door open, so that the front sliding body continuously moves forwards on the sorting track until the front sliding body enters the conversion track, and then the rear sliding pin enters the conversion flange from the horizontal flange through the switching door. Correspondingly, the front sliding pin on the left side of the sorting trolley is smoothly transited to the front shifting edge from the horizontal blocking edge, and then the rear sliding body moves forwards on the horizontal rail until entering the switching rail, so that the sorting trolley is always kept in a stable horizontal moving state.

When the sorting trolley starts to enter the horizontal rail of the lower layer from the switching rail at the front end and moves backwards, the rear sliding pin on the right side of the sorting trolley firstly moves to the horizontal flange on the lower side from the switching flange through the switching door, and then the front sliding body triggers the locking mechanism to push the switching door open, so that the sorting trolley enters the horizontal rail of the lower layer from the switching rail and moves backwards. Correspondingly, the rear sliding body on the left side of the sorting trolley firstly enters the lower horizontal rail smoothly from the switching rail, and then the front sliding pin smoothly transits to the lower horizontal flange from the front shifting edge.

When the rear sliding body on the left side of the sorting trolley moves backwards to the junction of the horizontal flange on the lower layer and the conversion flange on the rear side, the rear sliding body triggers the locking mechanism to push the switching door open, so that the rear sliding body continuously moves backwards on the sorting track until the rear sliding body enters the conversion track. Meanwhile, the front sliding pin enters the switching flange from the horizontal flange of the lower layer through the switching door. Correspondingly, the front sliding body on the right side of the sorting trolley moves backwards on the sorting track until entering the conversion track, and the rear sliding pin smoothly transits from the horizontal flange of the lower layer to the rear conversion flange, so that the sorting trolley is always kept in a stable horizontal movement state.

When the sorting trolley enters the horizontal rail on the upper layer again from the switching rail at the rear end and moves forwards, the front sliding body on the right side of the sorting trolley enters the horizontal rail on the upper layer smoothly from the switching rail and moves forwards, and then the rear sliding pin is smoothly transited to the horizontal flange on the upper layer from the rear switching flange. Correspondingly, the front sliding pin on the left side of the sorting trolley is smoothly transited to the horizontal flange on the upper layer from the conversion flange, and then the rear sliding body triggers the locking mechanism to push the switching door open until the rear sliding body enters the horizontal rail on the upper layer from the conversion rail.

By analogy, the sorting trolley can stably and circularly move on the sorting track.

As shown in fig. 10 and 11, the locking mechanism of the present invention includes a shaft pin 8 horizontally movably disposed on the horizontal rail back and forth, and a lock pin 9 vertically movably disposed on the horizontal rib. A shaft pin through hole 91 is required to be arranged on the lock pin, and a return spring 92 is sleeved on the lock pin and enables the lock pin to be positioned at a locking position. One end of the shaft pin is abutted against the side surface of the lock pin, and the lock pin plays a locking role in limiting axial movement of the shaft pin. The rotatable switching door comprises a gear sleeve 71 sleeved on the rotating shaft and provided with external teeth, a rack 81 meshed with the gear sleeve is arranged at the other end, far away from the lock pin, of the shaft pin, and a reset torsion spring is arranged on the rotating shaft of the switching door and enables the switching door to be automatically positioned in a closed state.

When the front sliding body moves forwards on the horizontal rail to the junction of the horizontal flange and the conversion flange, the front sliding body pushes the lock pin first, and the lock pin vertically moves to the unlocking position where the shaft pin through hole is opposite to the shaft pin attached to the lock pin. Then the front sliding body pushes the switching door, so that the shaft pin is driven by the gear sleeve and the rack to move and is inserted into the shaft pin through hole of the lock pin, the switching door is switched to an opening state, and the front sliding body can conveniently cross the opening at the junction of the horizontal flange and the switching flange and enter the switching track. And then the reset torsion spring drives the switching door to automatically reset to a closed state, and the switching door is withdrawn from the shaft pin through hole of the lock pin by driving the shaft pin to move in the direction of the gear sleeve and the rack, at the moment, the reset spring drives the lock pin to vertically move to reset a locking position, and the switching door is locked in the closed state again.

It is understood that the process of the rear sliding body opening the switching door is similar to the above description, and the description is not repeated here. In addition, the position of the lock pin should be as close to one side of the driving chain as possible, and the lengths of the front sliding pin and the rear sliding pin should be as short as possible on the basis of ensuring that the front sliding pin and the rear sliding pin can be attached to the positioning flanges so as not to touch the lock pin during movement.

Claims

1. An intelligent three-dimensional crossing express logistics sorting system with less occupied area comprises a sorting conveyor belt arranged on a rack and a plurality of sorting trolleys arranged on the sorting conveyor belt at intervals, wherein the rear end of the sorting conveyor belt is a driving end, the front end of the sorting conveyor belt is a driven end, and a plurality of sorting ports are respectively arranged on two sides of the sorting conveyor belt. The rear sliding body is connected to the rear sorting track in a sliding mode, the distance between the front sliding body and the rear sliding body in the front-rear direction is equal to the dislocation distance between the two sorting tracks, the sorting trolley is provided with a discharging mechanism, when sorting packages, a bar code on the package to be sorted is firstly scanned in a code scanning mode, the scanned package is placed in the sorting trolley, the sorting trolley receives address information obtained by code scanning, then when the sorting trolley moves forwards on the sorting track to a sorting port position corresponding to the code scanning information, the discharging mechanism enables the package on the sorting trolley to turn over and enter the sorting port to be concentrated, the front sliding body and the rear sliding body are driven by a driving chain on the sorting track, the front end of the rack is provided with a tensioning motor controlled by a controller and a front moving rack capable of moving forwards and backwards, and forwards, and backwards moving the front moving rack is related to the tensioning motor through a transmission mechanism, the transmission mechanism comprises a front worm connected with a motor shaft of the tensioning motor, a front worm wheel arranged at the front end of the frame and meshed with the front worm, a front screw sleeve arranged on the forward moving frame, a front lead screw in threaded connection with the front screw sleeve coaxially arranged on a front worm wheel shaft, the front worm wheel comprises a central shaft sleeve connected on the worm wheel shaft in a key way, an outer gear ring meshed with the front worm, and a radial plate integrally connected between the central shaft sleeve and the outer gear ring, a strain shaft sleeve is connected with the worm wheel shaft of the front worm wheel in a key way, the strain shaft sleeve is attached to the central shaft sleeve, the outer side of the strain shaft sleeve is provided with a sector piece extending in the radial direction, the side surface of the radial plate of the front worm wheel close to the strain shaft sleeve is provided with an accommodating groove, the fan-shaped sheet is rotatably positioned in the accommodating groove, so that the surface of the segment is flush with the side of the web, one end of the resistive strain gauge is bonded to the surface of the segment, and the other end is bonded to the side of the web flush with the segment.

2. The system as claimed in claim 1, wherein a driving sprocket engaged with the driving chain is provided at the driving end of the sorting conveyor belt, a driven sprocket engaged with the driving chain is provided at the driven end of the sorting conveyor belt, two driving sprockets engaged with the left and right driving chains are associated with the synchronous driving mechanism, the front and rear sliders are respectively connected to the driving chains on the corresponding sides, and when the synchronous driving mechanism drives the two driving sprockets to rotate synchronously, the sorting trolley is driven by the left and right driving chains to move along the sorting conveyor belt.

3. The intelligent three-dimensional crossing express logistics sorting system with small floor area as claimed in claim 2, wherein the driven sprocket is arranged on a front moving frame, a rear worm gear meshed with the rear worm gear and a rear moving frame capable of moving back and forth are arranged at the rear end of the frame, the driving sprocket and the synchronous driving mechanism are arranged on the rear moving frame, a rear screw sleeve is arranged on the rear moving frame, a rear lead screw in threaded connection with the rear screw sleeve is arranged on a rear worm gear shaft, and the rear worm gear is associated with the tensioning motor.