WO2020082849A1

WO2020082849A1 - Friction drive apparatus, cross-belt sorting machine and cross-belt sorting system

Info

Publication number: WO2020082849A1
Application number: PCT/CN2019/099214
Authority: WO
Inventors: 蔡熙; 李金成
Original assignee: 苏州金峰物联网技术有限公司
Priority date: 2018-10-25
Filing date: 2019-08-05
Publication date: 2020-04-30
Also published as: CN109335568A

Abstract

Disclosed are a friction drive apparatus, a cross-belt sorting machine and a cross-belt sorting system. The friction drive apparatus comprises at least one pair of driving wheels (1, 2) keeping a tiny gap therebetween with the axes thereof being parallel to each other; two of said driving wheels (1, 2) are rotatably arranged on a mounting plate (4) and are driven to rotate by a same motor (5), the rotation directions of the two driving wheels are opposite to each other. The apparatus has delicate design and simple structure, and the arrangement of a special belt drive mechanism enables one motor to drive two driving wheels to rotate. Compared with the existing friction drive structure, the apparatus leaves out a motor, thereby greatly reducing the equipment cost, ensuring lower energy consumption, and reducing the maintenance and replacement cost of the drive structure.

Description

Friction drive, cross-belt sorter and cross-belt sorting system

Technical field

The invention relates to the field of logistics sorting, especially a friction drive device, a cross belt sorting machine and a cross belt sorting system.

Background technique

The cross-belt sorter is a sorting device commonly used in logistics sorting. It is connected by a main drive belt conveyor and a trolley carrying a small belt conveyor (referred to as a "car" for short). When the "car" moves When the specified sorting position is reached, the belt is rotated to complete the task of sorting and sending out the goods.

The existing trolley driving method is often a motor + sprocket + chain. On the one hand, the trolley needs to be connected to the chain, which increases the difficulty of assembly. On the other hand, due to the chain pitch limitation, the gap between the trolleys is relatively The large number leads to a reduction in the number of trolleys; and because of the limited number of power points, in order to ensure sufficient driving force, the length of the chain often needs to be controlled within a reasonable range, and the length of the chain limits the extension of the loop. , Is not conducive to the expansion of the line.

There are also some cross-belt sorters driven by friction-driven power, such as the Chinese patent with patent application number 201720689640.7, which uses two motors to drive the two rollers to rotate to achieve the object located between the two rollers. Although this structure solves the shortcomings of the chain drive, it needs two motors, which increases the equipment cost and energy consumption.

Summary of the invention

The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide a friction drive device driven by a single motor, a cross belt sorter and a cross belt sorting system.

The purpose of the present invention is achieved by the following technical solutions:

The friction drive device includes at least a pair of drive wheels that maintain a micro gap and are parallel to the axis. The two drive wheels are rotatably disposed on a mounting plate and driven to rotate by the same motor, and their rotation directions are opposite.

Preferably, in the friction drive device, the motor is connected to the two drive wheels through a belt transmission assembly.

Preferably, in the friction drive device, the belt drive assembly includes a driving wheel, a support wheel, and a drive belt connected to the motor. The support wheel and the two drive wheels contact the drive belt in sequence, and the support wheel is located at the In the area enclosed by the transmission belt, one of the drive wheels is located outside the area enclosed by the transmission belt, and one is located in the area enclosed by the transmission belt.

Preferably, the friction driving device further includes a driven wheel paired with each of the driving wheels, and a belt is set between the pair of driving wheels and the driven wheel, and the conveying surfaces of the two belts are parallel and maintain a gap.

Preferably, in the friction drive device, the driving wheel and the driven wheel are V-ribbed belt wheels, and the belt is a V-ribbed belt.

The cross-belt sorter includes at least one endless track and at least one set of cross-belt trolleys slidably disposed thereon, and the cross-belt trolleys are driven by any of the above friction drive devices.

Preferably, in the cross belt sorter, the circular track is arranged horizontally or vertically.

Preferably, in the cross-belt sorter, there are two endless rails with height differences, and each endless rail is provided with a set of cross-belt trolleys.

Preferably, in the cross-belt sorter, a side-by-side conveying loop composed of two sets of cross-belt trolleys is rotatably provided on the endless track.

The cross-belt sorting system includes any one of the above-mentioned cross-belt sorters, and also includes an upper package line connected to the cross-belt sorter, a lower parcel grid, and an industrial control machine that works with the control system.

Preferably, in the cross-belt sorting system, the upper enveloping line integrates at least one device from barcode scanning, dynamic weighing, and volume measurement.

Preferably, in the cross-belt sorting system, the upper wrapping line includes an orientation structure in which at least one edge of the box package is parallel to the conveying direction of the cross-belt trolley connected to the upper wrapping line.

The advantages of the technical solution of the present invention are mainly reflected in:

The scheme is exquisite in design and simple in structure. Through the setting of a special belt transmission mechanism, one motor drives two drive wheels to rotate. Compared with the existing friction drive structure, one motor is omitted, and the equipment cost is greatly reduced. The energy consumption of the two motors is lower than that of a single motor, and the maintenance and replacement cost of the transmission structure is also lower.

The driving wheel and driven wheel adopt multi-ribbed belt wheels, which can effectively place the problem of deviation of the driving belt, which is conducive to ensuring the stability of the drive, and at the same time increasing the driving belt is beneficial to increasing the contact area between the friction drive mechanism and the object To increase the driving force.

The friction drive structure of the solution is convenient for adjusting the position and quantity according to the application scenarios, and the application flexibility is good.

The sorting system of this scheme, through the rational design of the circular track and the rational design of the cross-belt trolley, makes the system have a variety of different combinations, so that it can be reasonably adjusted according to different applications, with good flexibility and wide application. .

By using two sets of trolleys in a circular track, the space inside the loop line can be used to increase the number of cross-belt trolleys without increasing the floor space, thereby increasing the number of sorting grids and increasing the use of the sorter The efficiency reduces the cost of the equipment, and at the same time enables the transfer of the parcel between the two conveyor belts, which can reduce the vacancy rate of the trolley, at the same time increase the flexibility of the package and reduce the layout requirements of the package line And take up space.

When the rail is placed vertically, the longitudinal space can be fully utilized to avoid the problem of using a horizontal layout method in the prior art to require a larger horizontal space. The requirements for the application site are greatly reduced, and the flexibility of the application is increased.

The layout of the double-layer circular track can increase the number of sorting equipment without increasing the floor space, thereby increasing the sorting capacity by multiples.

A package orientation device is provided on the bagging line to enable the package to be transported to the cross-belt trolley in a uniform form and to keep the cross-belt trolley in a straight state, which is convenient for subsequent sorting operations.

By improving the dynamic balance performance of the roller in the dynamic weighing section, the vibration generated when the roller rotates at a high speed is reduced, thereby reducing the impact of the vibration of the conveyor line on the measurement accuracy of the sensor. The improved final error can be controlled within ± 30g Compared with the conventional error range of ± 50- ± 100, the weighing accuracy is greatly improved.

Through the design of the wall thickness of the roller in the dynamic weighing section, the balance accuracy of the roller is further improved, which provides the possibility of improving the weighing accuracy.

The design of the roller shape of the dynamic weighing section can make full use of the shape characteristics of the belt and the roller when they are in close contact, to avoid the problem of belt deviation.

The reverse installation of the bearings in the dynamic weighing section can increase the aesthetics of the equipment and avoid the problem of convexity. At the same time, it can reduce the distance of the top thread on the two bearings connected by the same roller to reduce the top thread. There is a risk of loosening, which in turn ensures the firmness of the connection between the shaft and the bearing, reduces the possibility of vibration of the roller, helps reduce the vibration, and ensures the realization of weighing accuracy.

BRIEF DESCRIPTION

1 is a plan view of the friction drive device of the present invention;

2 is a perspective view of the friction drive device of the present invention;

3 is a partial side view of the cross belt sorter of the present invention;

4 is a schematic structural view of the horizontal arrangement of the cross belt sorter of the present invention;

5 is a schematic structural view of the longitudinal arrangement of the cross belt sorter of the present invention;

6 is a schematic diagram of the structure of the cross-belt sorter of the present invention having a double-layer circular track and a double conveying ring;

7 is a schematic diagram of the structure of the upper winding of the present invention;

8 is a schematic diagram of the dynamic weighing section in the present invention;

9 is a schematic diagram of the roller of the conveyor in the dynamic weighing section of the present invention;

Fig. 10 is a schematic diagram of the reverse mounting of the bearings in the dynamic weighing section of the present invention.

detailed description

The objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of the preferred embodiments. These embodiments are only typical examples of applying the technical solution of the present invention. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection of the present invention.

In the description of the plan, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", " The orientation or positional relationship indicated by "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation It is constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", and "third" are for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as the reference, the direction approaching the operator is the proximal end, and the direction away from the operator is the distal end.

The friction drive device disclosed in the present invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2, it includes at least a pair of

drive wheels

1 and 2 that maintain a micro gap 3 and an axis parallel, and two drive wheels 1 2, 2 is rotatably installed on a mounting plate 4 and is driven to rotate by the same motor 5, and their rotation directions are opposite.

When an object is located between the two

driving wheels

1 and 2 and is in contact with them, at this time, the motor 5 drives the two

driving wheels

1, 2 to rotate, because the

driving wheels

1, 2 are in contact with the surfaces opposite to the objects, And their rotating directions are opposite, so the direction of friction between them and the surface of the object is the same, thus pushing the object to move.

In order for the two

drive wheels

1, 2 to be driven by one motor 5, the motor 5 needs to be connected to the

drive wheels

1, 2 through a transmission mechanism, which can be a gear transmission mechanism or a chain + chain In a preferred embodiment, a transmission mechanism composed of wheels, the motor 5 is connected to the two

drive wheels

1 and 2 through a belt transmission assembly 6.

Specifically, as shown in FIG. 1, the belt transmission assembly 6 includes a driving wheel 61, a supporting wheel 62, and a driving belt 63 that are rotatably provided on the mounting base 65 and connected to the motor 5, the driving wheel 61 is located below the

driving wheels

1, 2, the supporting wheel is located above the two

driving wheels

1, 2, and the supporting wheel 62, the two

driving wheels

1, 2 are in contact with the transmission belt 63 in sequence, while making The support wheel 62 is located in the area enclosed by the transmission belt 63, one of the

drive wheels

1, 2 is located outside the area enclosed by the transmission belt 63, and one is located in the area enclosed by the transmission belt, thereby The transmission belt is S-shaped between the two

drive wheels

1 and 2.

In addition, as shown in FIG. 1, the belt transmission assembly 6 further includes a tension wheel 64 for making the transmission belt 63 and the support wheel 62 abut, the tension wheel is located on the driving wheel 61 and the support wheel 62 Between and outside the area enclosed by the drive belt.

Further, in order to increase the contact area between the friction drive device and the object to increase the frictional force, therefore, as shown in FIGS. 1 and 2, the friction drive device further includes a slave paired with each of the

drive wheels

1, 2 The

driving wheels

7 and 8 are provided with a driving belt 9 between a pair of driving wheels and driven wheels. The conveying surfaces of the two driving belts 9 are parallel and maintain a gap, and the driving belt 9 is located above the transmission belt 63.

At the same time, in order to prevent the driving belt 9 from deviating on the

driving wheels

1, 2 and the driven

wheels

7, 8 and affecting the driving force, as shown in FIG. 2, the

driving wheels

1, 2 and the driven

wheels

7, 8 is a V-ribbed belt pulley, and the corresponding driving belt 9 is a matched V-ribbed belt.

Another embodiment of the present invention discloses a cross-belt sorter. As shown in FIG. 3, it includes at least one endless track 200 and a set of one-by-one, cross-connected and slidably arranged cross-belts on the endless track 200 The trolley 300, the cross-belt trolley 300 is driven by the friction driving device 100.

Wherein, the circular track 200 may be arranged horizontally as shown in FIG. 4, and the layout shape of the circular track 200 may be an irregular loop line, or a regular shape such as a circle, an ellipse, a waist, or a rounded rectangle, etc. Preferably, the ring-shaped track 200 is rectangular with rounded corners. In another embodiment, the ring-shaped track 200 may also be arranged longitudinally as shown in FIG. 5, that is, it includes an upper layer, a lower layer and a connection with a height difference Their connecting segment.

In addition, when the circular rail 200 is in a vertical position, when the cross-belt trolley 300 runs to the lower layer, it will tend to be separated from the circular rail under the action of gravity. Therefore, as shown in FIG. The side plates are respectively formed with sliding grooves for the wheels of the cross belt trolley to pass through, so that the wheels on the cross belt can be supported by the sliding grooves to ensure that they can continue to slide along the circular track.

In addition, as shown in FIG. 4, there may be only one conveyor loop line formed by a group of cross-belt trolleys 300 on the circular track 200. Of course, in another embodiment, as shown in FIG. 6, the The circular rail 200 may be rotatably provided with two side-by-side conveyor loops composed of two sets of cross-belt trolleys 300.

Further, in a preferred embodiment, as shown in FIG. 6, the two circular rails 200 are two and have a height difference, and the projections of the two circular rails 1 on the horizontal plane coincide, each circular rail 200 At least one set of cross-belt trolleys 300 connected in sequence is provided on the top, so that the utilization of longitudinal space can be further improved, and the sorting capacity can be doubled under the same floor space.

The cross-belt trolley 300 may be of various known structures. In a preferred embodiment, as shown in FIG. 3, it includes a frame 3001 on which a pair of rollers that can roll along a circular track are provided. A roller 3002 and a pair of directional wheels 3003, a belt conveyor 3004, and a driving plate 3005 located between the two driving belts 9 to be driven by the friction driving device 100, wherein the belt conveyor 3004 may be known The various structures of this are not repeated here; and, when two conveyor loops composed of two sets of cross belt trolleys 300 are provided on one track, the two cross belt trolleys 300 side by side in the two conveyor loops may have The same frame that can slide on the circular rail 200 can also have a frame separately.

During operation, the driving plates 3005 on each cross-belt trolley 300 are driven forward by the friction of the two driving belts 9 one by one, so that the entire conveying loop line continuously rotates along the annular track 200 and the conveying annular speed is required , The number of corresponding friction driving devices 100 can be increased, thereby increasing the driving point to change the driving force.

The present invention further discloses a cross-belt sorting system, as shown in FIG. 4, including the above-mentioned cross-belt sorter, and further includes an upper bag line 400, a lower bag grid 500 and the An industrial computer (not shown in the figure) that controls the operation of the system.

Wherein, as shown in FIG. 7, the upper wrapping line 400 may have the following structure, which includes a supplying section 4002, a dynamic weighing section 4003, and an acceleration conveying section 4004 connected in sequence, and a package is provided at the supplying section 4002 An orientation device 4001, and a bar code and / or two-dimensional code recognition device 4005 and a volume measurement device 4006 are provided on the one or more of the packet supply section 4002, the dynamic weighing section 4003, and the acceleration conveyor section 4004 through a bracket 4007 .

The parcel orientation device 4001 includes a right-angle positioning groove (not shown in the figure), and a plane of the right-angle positioning groove is parallel to the axis direction of the roller of a belt conveyor of a cross-belt trolley that is connected with the above-mentioned wrapping wire. When positioning the box package, the two vertical surfaces of the package are respectively attached to the two surfaces of the right-angle positioning groove, so that when the box package is moved to the trolley, one edge of the package can be transported with the cross belt trolley The directions are parallel. At this time, the parcel conveyed by the upper wrapping line can be placed in a straight state on the corresponding cross-belt trolley.

As shown in FIG. 8, the dynamic weighing section 4003 includes a base frame 10, a conveyor line 30 connected to the base frame 10 through a load cell 20, and a weighing instrument 40 in communication with the load cell 10 The weighing instrument 40 is used for various weighing settings and results display, and is connected to the industrial control computer of the entire system.

The base frame 10 may be of various feasible materials or shapes, as long as it can provide stable support. Preferably, as shown in FIG. 8, it includes at least four upright posts 101 connected by a profile, each The top surface of each column 101 is provided with the load cell 20. The load cell 20 may be a variety of known load cells, such as S-type, cantilever-type, spoke-type, plate-ring-type, diaphragm-type, Products of various styles, models, and brands such as bridge type and column type.

The four load cells 20 are provided with the conveying line 30. The conveying line 30 may be a belt conveyor or a roller conveyor. Preferably, a belt conveyor is used as an example, as shown in FIG. The conveying line 30 includes a bracket 302 having four legs 3021 provided on the four load cells 20. Two ends of the bracket 302 are rotatably set up with a roller 301, the roller The balance accuracy level of 301 is not lower than G16. Two rollers 301 are covered with a belt 303, and at least one roller 301 has a rotating shaft connected to a power device 304 that drives its rotation. The power device 304 may be of various feasible types Of the motor, such as motor + reducer + wheel + belt or motor + reducer + gear + chain or direct motor + reducer structure, the conveying speed of the power device 304 driving the belt 303 is not less than 80m / min .

Further, since the conventional roller 301 is made of hot-rolled steel, the thickness of the different areas of the roller wall is not uniform after forming and forming, resulting in relatively poor balance accuracy. Therefore, after the roller is formed, a milling cutter will be used A layer is cut from the inner wall of the roller, and, as shown in FIG. 9, the wall thickness of the middle region 3011 of the roller is greater than the wall thickness of the regions 3012 on both sides of the roller; in addition, the inventor found that the roller 301 The thicker the wall of the drum, the greater the weight, the greater the inertia it receives, the more likely it is that dynamic imbalance occurs, so the wall thickness of the middle region 3011 of the roller 301 is controlled at 6-8mm, and the regions 3012 on both sides The wall thickness is 4 ± 1mm.

In addition, if the surface of the roller 301 is flat, when the roller 301 rotates, the belt 303 on the roller 301 is prone to misalignment, which gives equipment stability and transportation safety. Therefore, when designing As shown in FIG. 9, the roller 301 is set such that the diameter of the middle region 3011 is larger than the diameter of the regions 3012 on both sides, and the regions 3012 on both sides appear as a truncated cone with a small outer end and a large inner end, so that the belt When 303 is in close contact with roller 301, it presents an arc shape, which can increase the difficulty of translation and avoid belt deviation.

Further, in order to increase the fit of the belt 303 and the roller 301, as shown in FIG. 8, the bracket 302 may be rotatably provided with an extension direction that is the same as that of the roller 301 and located between the two rollers 301 Between the tension roller 305, the tension roller 305 abuts the bottom surface of the lower belt 331, and its apex is above the lowest point of the roller 301, so that the lower belt 3031 and the tension roller 305 The distance from the contact point to the upper belt 3032 is smaller than the diameter of the roller 301.

At the same time, as shown in FIG. 10, each of the rollers 301 is mounted on the bracket 302 through a pair of outer spherical bearing 306. During normal installation, the protruding end of the outer spherical bearing 306 faces outward (i.e. positive Installation), in this way, the distance between the two top wires is relatively long, so that it is more susceptible to loosening due to the dynamic imbalance of the bearing. Therefore, in this solution, the outer spherical bearing 36 is installed reversely on the bracket On 302, and the protruding ends of the two outer spherical seated bearings 306 are disposed inward and face each other.

When working, the package is placed at the package orientation device 4001 manually or by automated equipment, and is transported to the dynamic weighing section 4003 through the supply section 4002. In the dynamic weighing section 4003, the barcode or two-dimensional code is identified The device reads the barcode or two-dimensional code on the package to obtain information such as the path of the package. In addition, the weighing sensor and the volume measuring device respectively measure the weight and volume of the package, and bind and store the information of the package in the industrial control In the machine, the package after obtaining the corresponding information is transported to the acceleration conveyor section 4004 for acceleration and transfer to an empty cross-belt trolley 300. When the cross-belt trolley 300 rotates with the circular track 200 to reach the destination, the cross-belt trolley 200 The belt conveyor starts to unload the parcel.

The present invention has various embodiments, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

The friction drive device is characterized in that it includes at least one pair of drive wheels (1, 2) that maintain a micro gap (3) and the axis is parallel, and the two drive wheels (1, 2) are rotatably disposed on a mounting plate ( 4) The upper motor is driven by the same motor (5), and their rotation directions are opposite.
The friction drive device according to claim 1, characterized in that the motor (5) is connected to the two drive wheels (1, 2) through a belt transmission assembly (6).
The friction drive device according to claim 2, characterized in that the belt transmission assembly (6) includes a driving wheel (61), a support wheel (62) and a transmission belt (63) connected to the motor (5), so The support wheel (62) and the two drive wheels (1,2) sequentially contact the transmission belt, and the support wheel (62) is located in the area enclosed by the drive belt (63). The drive wheels (1,2) ) Is located outside the area enclosed by the drive belt (63), and one is located within the area enclosed by the drive belt.
The friction drive device according to claim 1, further comprising a driven wheel (7, 8) paired with each of the driving wheels (1, 2), and a pair of driving wheels and driven wheels are sleeved A driving belt (9), the conveying surfaces of the two belts are parallel and maintain a gap.
The friction drive device according to claim 4, characterized in that the drive wheels (1, 2) and the driven wheels (7, 8) are V-ribbed belt wheels, and the drive belt (9) is a V-ribbed belt.
Cross belt sorting machine, comprising at least one circular track (200) and at least one set of cross belt trolleys (300) slidably arranged thereon, characterized in that the cross belt trolley is defined by any one of claims 1-5 The friction drive device (100) is driven.
The cross-belt sorter according to claim 6, characterized in that the circular track (200) is arranged horizontally or longitudinally.
The cross-belt sorter according to claim 6, characterized in that there are two circular rails (200) with height differences, and each circular rail (200) is provided with a set of cross-belt trolleys (300) .
The cross-belt sorter according to claim 6, characterized in that the endless rail (200) is rotatably provided with side-by-side conveyor loops composed of two sets of cross-belt trolleys (300).
A cross-belt sorting system, characterized by comprising the cross-belt sorter according to any one of claims 6-9, and further comprising an upper package line, a lower package grid and a control system connected to the cross-belt sorter IPC for work.
The cross-belt sorting system according to claim 10, characterized in that: the upper envelope is integrated with at least one device of barcode scanning, dynamic weighing, and volume measurement.
The cross-belt sorting system according to claim 10, wherein the upper wrapping line includes an orientation structure in which at least one edge of the box parcel is parallel to the conveying direction of the cross-belt trolley connected to the upper wrapping line.