Rolling type weighing unit, array type weighing sorting line and weighing method thereof

Abstract

The invention discloses a rolling type weighing unit, an array type weighing sorting line and a weighing method thereof. The rolling type weighing unit comprises weighing sensors arranged on a sorting track; the roller is provided with a roller surface, the roller is rotationally connected to the fixed seat, and the axis of the roller is horizontally arranged; the driving mechanism drives the rolling wheel to rotate around the axis of the rolling wheel; when the rolling type weighing unit is used for weighing, the rotating linear speed of the rolling wheels is consistent with the linear speed of the tray assembly, and the rolling wheels are in stable contact with the tray assembly. The rolling wheels are driven by the driving mechanism to rotate, the tray assembly can move along the sorting track according to the specified linear speed, the wheel face linear speed of the rolling wheels of the rolling type weighing units is controlled to be equal to the linear speed of the tray assembly, and therefore when the weighing units make contact with the trays of the tray assembly to conduct weighing during rolling, the tray assembly is not damaged. The vibration generated when the tray is in contact with the roller is offset, and the stability of the tray in the weighing process is kept, so that the weighing accuracy is improved, and articles with the weight of only several grams to dozens of grams can be accurately measured.

Description

Technical Field

[0001] The present invention relates to the field of sorting weighing lines, and further to a rolling weighing unit, an array weighing sorting line and a weighing method thereof. Background Art

[0002] With the rapid development of e-commerce in recent years, the daily express delivery volume in China has increased day by day. In order to improve the efficiency of express delivery sorting, express delivery sorting centers have introduced sorting systems, which need to sort and weigh express delivery items one by one. The prior art discloses a dynamic weighing tray and a sorting machine with it, and the patent publication number is CN221335489U. The weighing principle is to lift the lifting shaft through the weighing track, and the lifting shaft lifts the tray body located on it upward, so as to achieve the weighing of the items. However, in a short period of time, the lifting shaft needs to move in the vertical direction, which causes the tray body to shake easily, and the shaking will further cause the weighing accuracy to decrease. Some items are light, only a few grams to more than ten grams, and the weighing scheme of the prior art cannot meet its weighing accuracy and cannot achieve the purpose of accurately measuring small weight items. Summary of the invention

[0003] The purpose of the present invention is to provide a rolling weighing unit, an array weighing sorting line and a weighing method thereof, so as to solve the technical problem that small-weight express deliveries cannot be accurately weighed in the prior art, and can accurately measure items weighing only a few grams to more than ten grams, thereby improving the weighing accuracy of the sorting weighing system.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a rolling weighing unit, including a weighing sensor arranged on a sorting track, and also including: a fixed seat, the fixed seat is arranged on the weighing sensor; a roller, the roller has a wheel surface, the roller is rotatably connected to the fixed seat and the axis of the roller is horizontally arranged; a driving mechanism, the driving mechanism drives the roller to rotate around its own axis; when the rolling weighing unit weighs the items on the tray assembly, the rotation linear speed of the roller is consistent with the linear speed of the tray assembly, and the rolling weighing unit is in stable contact with the tray assembly.

[0005] In some embodiments, the number of the rollers is at least one. When there are two or more rollers, all the rollers are disposed at the same height of the fixing seat.

[0006] In some embodiments, the roller is rotatably connected to the fixed seat via a transmission shaft, and the roller rotates synchronously with the transmission shaft; the driving mechanism is a driving motor, and the power output shaft of the driving motor is connected to the transmission shaft via a gear transmission mechanism, and the transmission shaft is rotatably connected to the fixed seat via a bearing seat.

[0007] In some embodiments, the gear transmission mechanism includes: a driving gear, which is connected to the power output shaft of the drive motor and rotates synchronously with the power output shaft of the drive motor; a driven gear, which is connected to the transmission shaft in a one-to-one correspondence, and the driven gear drives the corresponding transmission shaft to rotate synchronously, and the driven gear is meshed with the driving gear for transmission.

[0008] In some embodiments, the rolling weighing unit also includes a first nut and a second nut threadedly connected to the transmission shaft, the two ends of the first nut respectively abut against the driven gear and the roller, and the second nut is located on the side of the roller away from the fixed seat and the end of the second nut abuts against the roller.

[0009] The present invention also provides an array-type weighing sorting line, comprising a sorting track, a tray assembly and the aforementioned rolling weighing unit, the tray assembly moves along the extension direction of the sorting track, the rolling weighing units are multiple and symmetrically arranged on both sides of the sorting track, and the rollers on the rolling weighing units are arranged along the extension direction of the sorting track; the tray assembly comprises a tray, a vertical movable structure fixedly connected to the tray and a base connected to the sorting track, the vertical movable structure is connected to the base and can move in the vertical direction; when the rolling weighing unit weighs items, the rollers of at least one pair of symmetrically arranged rolling weighing units jointly lift the tray from both sides, and the vertical movable structure is in a lifted state; when the rolling weighing unit does not weigh items, the rollers of the rolling weighing unit are separated from the tray, and the vertical movable structure is in a non-lifted state.

[0010] In some embodiments, at least two of the rolling weighing units are provided on a single side of the sorting track along the extension direction of the sorting track, the number of all the rollers is greater than or equal to the number of all the rolling weighing units, and the rollers of the rolling weighing units are all arranged at the same height; when the tray moves along the extension direction of the sorting track and presses over the rollers, the total length that the tray and the rollers can contact at the same time is a first length, and the wheel spacing between the first and last rollers on the same side of the sorting track is a second length, and the first length is less than the second length.

[0011] In some embodiments, the base is provided with a first guide hole running vertically therethrough; the vertical movable structure includes: a first vertical rod vertically connected to the bottom of the tray, the first vertical rod passing through the first guide hole, the first vertical rod being a cylinder or the end of the first vertical rod away from the tray being conical; a first limiting plate, the first limiting plate being connected to the end of the first vertical rod away from the tray.

[0012] In some embodiments, the array weighing sorting line further includes: a position sensor, wherein the position sensor is disposed on the sorting track and is capable of determining the position of the tray assembly.

[0013] The present invention also provides another array-type weighing sorting line, comprising a sorting track, a tray assembly and the aforementioned rolling weighing unit, wherein the tray assembly moves along the extension direction of the sorting track; the rolling weighing units are multiple and are arranged on the same side of the sorting track or symmetrically on both sides of the sorting track, the rollers on the rolling weighing units are arranged along the extension direction of the sorting track, and at least two rolling weighing units are arranged on the same side of the sorting track; the tray assembly comprises: a general base, the general base is connected to the sorting track and moves along the extension direction of the sorting track, and the general base is provided with an avoidance mechanism at the position corresponding to the roller of the rolling weighing unit Structure; one single-sided tray or two symmetrically arranged single-sided trays; single-sided vertical movable structures arranged on the single-sided trays in a one-to-one correspondence, the single-sided vertical movable structures are connected to the main base and can move in the vertical direction; when the rolling weighing unit weighs the items, the rollers of the two rolling weighing units located at the corresponding positions of the sorting track respectively lift the single-sided tray from the bottom and side of the single-sided tray, and the single-sided vertical movable structure is in a lifted state; when the rolling weighing unit does not weigh the items, the rollers of the rolling weighing unit are separated from the single-sided tray, and the single-sided vertical movable structure is in a non-lifted state.

[0014] In some embodiments, at least 4 rolling weighing units are provided on a single side of the sorting track along the extension direction of the sorting track, the rolling weighing units are an even number, and the number of all the rollers is greater than or equal to the number of all the rolling weighing units; when the single-sided tray moves along the extension direction of the sorting track and presses over the rollers, the smaller value of the total length that the single-sided tray and the rollers can contact at the same time is a third length, and the wheel spacing between the first and last rollers at the corresponding side and corresponding height of the sorting track is a fourth length, and the third length is smaller than the fourth length.

[0015] In some embodiments, a second guide hole extending vertically through the main base is provided; the single-sided vertical movable structure includes: a second vertical rod vertically connected to the bottom of the single-sided tray, the second vertical rod is passed through the second guide hole, and the second vertical rod is a cylinder; a second limiting plate, the second limiting plate is connected to the end of the second vertical rod away from the single-sided tray.

[0016] In some embodiments, the array weighing sorting line further includes: a position sensor, wherein the position sensor is disposed on the sorting track and is capable of determining the position of the tray assembly.

[0017] In some embodiments, the avoidance structure is an avoidance opening opened on the main base, and when the rolling weighing unit weighs the items, the part of the rolling weighing unit located in the avoidance opening at the corresponding position of the sorting track supports the bottom of the single-sided tray.

[0018] The present invention also provides an array weighing method, which is applied to the aforementioned array weighing sorting line, and is characterized in that it includes a single weighing step, which includes: obtaining all the rolling weighing units in contact with the tray assembly to form a first set; judging one by one whether the rolling weighing units in the first set are supporting two of the tray assemblies at the same time, and if so, deleting the rolling weighing units from the first set; and summing the weight values ​​of all the rolling weighing units in the first set to obtain a single weight value.

[0019] In some embodiments, within a preset time, the single weighing step is repeated at least M times, where M≥2; the single weight values ​​obtained each time the single weighing step is executed are averaged to obtain the average weight value of the items on the pallet.

[0020] Compared with the prior art, the rolling weighing unit, array weighing sorting line and weighing method provided by the present invention have the following beneficial effects:

[0021] 1. The present invention provides a rolling weighing unit, an array weighing sorting line and a weighing method thereof. The roller of the rolling weighing unit rotates under the drive of a driving mechanism, and the tray assembly moves along the sorting track at a specified linear speed. The wheel surface linear speed of the roller of the rolling weighing unit is controlled to be equal to the linear speed of the tray assembly. Therefore, when the weighing unit contacts the tray of the tray assembly for weighing during rolling, the jitter of the tray when contacting the roller is offset, and the stability of the tray during the weighing process is maintained, thereby improving the weighing accuracy and realizing accurate measurement of items weighing only a few grams to more than ten grams.

[0022] 2. The rolling weighing unit, array weighing sorting line and weighing method provided by the present invention, when the rolling weighing unit has two or more rollers, can contact and lift the tray at the same time during weighing, thereby further improving the stability during the weighing process and improving the weighing accuracy.

[0023] 3. The present invention provides a rolling weighing unit, an array-type weighing sorting line and a weighing method thereof, wherein a pair of rolling weighing units are symmetrically arranged on both sides of a sorting track of the array-type weighing sorting line. When the pair of rolling weighing units are weighing, the rollers of the pair of rolling weighing units will jointly lift the same pallet from both sides for weighing. At this time, the pallet assembly is a one-way flip pallet or a two-way flip pallet to avoid the pallet tilting during weighing and affecting the weighing accuracy.

[0024] 4. The present invention provides a rolling weighing unit, an array weighing sorting line and a weighing method thereof, wherein one array weighing sorting line includes a tray assembly having a single-sided tray or two symmetrically arranged single-sided trays. When the tray assembly moves to the rolling weighing unit, the single-sided tray can be weighed together by the two rolling weighing units at the corresponding positions, wherein the roller of one rolling weighing unit supports the bottom of the single-sided tray, and the roller of the other rolling weighing unit supports the side of the single-sided tray. When the tray assembly has two single-sided trays, the weighing efficiency is doubled because the two single-sided trays can be weighed simultaneously.

[0025] 5. The rolling weighing unit, array weighing sorting line and weighing method provided by the present invention can repeatedly obtain single weight values ​​measured at different positions of the same pallet or single-side pallet multiple times within a preset time, and then calculate the average value of these single weight values ​​to obtain the average weight value of the items on the pallet or single-side pallet, thereby further improving the weighing accuracy through multiple measurements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0027] Figure 1 It is a schematic diagram of a sorting line with array weighing;

[0028] Figure 2 It is a side view of the sorting line with array weighing;

[0029] Figure 3 yes Figure 2 Cross-sectional view along AA direction;

[0030] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0031] Figure 5 is a schematic diagram of a plurality of rolling weighing units, support bases and trusses located on one side of the sorting track;

[0032] Figure 6 yes Figure 5 Front view of

[0033] Figure 7 yes Figure 5 Side view of

[0034] Figure 8 It is a three-dimensional schematic diagram of a rolling weighing unit;

[0035] Fig. 9 is a side view of a rolling weighing unit;

[0036] Fig.10 It is a side view of the rolling weighing unit with the housing hidden;

[0037] Fig.11 yes Fig.10 Cross-sectional view along CC direction;

[0038] Fig.12 It is a three-dimensional schematic diagram of the rolling weighing unit after the outer shell is hidden and viewed from an angle;

[0039] Fig.13 It is a three-dimensional schematic diagram of the rolling weighing unit after the outer shell is hidden and viewed from another angle;

[0040] Fig.14 is a three-dimensional schematic diagram of a first type of tray assembly;

[0041] Fig.15 yes Fig.14 A side view of a tray assembly;

[0042] Fig.16 is a side view of a second tray assembly;

[0043] Fig.17 It is a schematic diagram of another type of array weighing sorting line;

[0044] Fig.18 yes Fig.17 Cross-sectional view along DD direction;

[0045] Fig.19 yes Fig.18 A partial enlarged view of point E in the middle;

[0046] Fig. 20 is a schematic diagram of a plurality of rolling weighing units and a support plate located on one side of a sorting track;

[0047] Fig.21 yes Fig. 20 Side view of

[0048] Fig. 22 is a three-dimensional schematic diagram of a third type of tray assembly;

[0049] Fig.23 is a schematic diagram of the structure of a fourth type of tray assembly;

[0050] Fig.24 This is a partial enlarged view of the fourth type of pallet assembly when it is weighed.

[0051] Description of Figure Numbers:

[0052] 1- rolling weighing unit, 1a- weighing sensor, 1b- roller, 1c- transmission shaft, 1d- second nut, 1e- housing, 1f- first nut, 1g- fixed seat, 1h- driving motor, 1i- bearing seat, 1j- driven gear, 1k- driving gear, 2- sorting track, 3- tray assembly, 3a- tray, 3b- base, 3c- first vertical pole, 3d- first limit plate, 3e- guide cone sleeve, 3f- single-sided tray, 3g- second guide hole, 3h- total base, 3i- second vertical pole, 3j- second limit plate, 3k- avoidance, 3l- bottom of single-sided tray, 3m- side of single-sided tray, 4- support seat, 5- truss, 6- support plate. DETAILED DESCRIPTION

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0054] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0055] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0056] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0058] [Example 1]

[0059] like Figure 8-Figure 13 As shown, in Example 1, a specific implementation of a rolling weighing unit 1 is disclosed, which includes a weighing sensor 1a, a fixing seat 1g, a roller 1b and a driving mechanism, wherein the fixing seat 1g is arranged on the weighing sensor 1a, the roller 1b has a wheel surface, and the roller 1b is rotatably connected to the fixing seat 1g, and the axis of the roller 1b is arranged horizontally. In this embodiment, the wheel surface of the roller 1b is smooth. The driving mechanism drives the roller 1b to rotate around its own axis. In this embodiment, there are two rollers 1b of the rolling weighing unit 1, and the two rollers 1b are arranged at the same height of the fixing seat 1g. The two rollers 1b can contact the lifting tray 3a at the same time during weighing, thereby further improving the stability during the weighing process and improving the weighing accuracy.

[0060] When the rolling weighing unit 1 weighs the items on the tray assembly 3 , the rotational linear velocity of the roller 1 b is consistent with the linear velocity of the tray assembly 3 , and the rolling weighing unit 1 is in stable contact with the tray assembly 3 .

[0061] In other embodiments, the rolling weighing unit 1 may also be provided with only one roller 1b, three rollers 1b or even more; the wheel surface of the roller 1b may also have a certain roughness or be inclined, which will not be described in detail here.

[0062] like Fig.12 As shown, the roller 1b is rotatably connected to the fixed seat 1g through the transmission shaft 1c, and the roller 1b is fixedly connected to the transmission shaft 1c so that the roller 1b and the transmission shaft 1c rotate synchronously. Specifically, the transmission shaft 1c is rotatably connected to the fixed seat 1g through the bearing seat 1i.

[0063] The aforementioned driving mechanism is a driving motor 1h, and the power output shaft of the driving motor 1h is connected to the transmission shaft 1c through a gear transmission mechanism. Figure 11-Figure 12As shown, the gear transmission mechanism includes a driving gear 1k and a driven gear 1j, wherein the driving gear 1k is connected to the power output shaft of the driving motor 1h and the driving gear 1k rotates synchronously with the power output shaft of the driving motor 1h, and the driven gears 1j are connected to the transmission shaft 1c one by one, and the driven gears 1j drive the corresponding transmission shaft 1c to rotate synchronously, and the driven gears 1j and the driving gear 1k are meshed and transmitted. When the power output shaft of the driving motor 1h rotates, it will first drive the driving gear 1k to rotate, and then the driving gear 1k will drive the driven gear 1j meshed with it to rotate, and finally the driven gear 1j drives the roller 1b to rotate through the transmission shaft 1c. In this embodiment, the two driven gears 1j have the same size and mesh with the same driving gear 1k, so the two driven gears 1j will rotate synchronously at the same rotation speed and direction.

[0064] Of course, in other embodiments, the driving mechanism may also drive the roller 1b to rotate through other transmission mechanisms, such as belt drive, chain rotation, etc., which will not be described in detail here.

[0065] like Fig.10 and Fig.12 As shown, the rolling weighing unit 1 also includes a first nut 1f and a second nut 1d which are threadedly connected to the transmission shaft 1c, the two ends of the first nut 1f respectively abut against the driven gear 1j and the roller 1b, the second nut 1d is located on the side of the roller 1b away from the fixed seat 1g and the end of the second nut 1d abuts against the roller 1b, so that the second nut 1d presses the roller 1b on the end face of the first nut 1f, and the first nut 1f is arranged between the driven gear 1j and the roller 1b, which can separate the two and avoid contact between the two.

[0066] The roller 1b of the rolling weighing unit 1 in this embodiment rotates under the drive of the driving mechanism, and the tray assembly 3 moves along the sorting track 2 at a specified linear speed. The wheel surface linear speed of the roller 1b of the rolling weighing unit 1 is controlled to be equal to the linear speed of the tray assembly 3. Therefore, when the weighing unit contacts the tray 3a of the tray assembly 3 for weighing during rolling, the jitter of the tray 3a when contacting the roller 1b will be offset, so that the stability of the tray 3a during the weighing process is improved, thereby improving the weighing accuracy and realizing accurate measurement of items weighing only a few grams to more than ten grams.

[0067] like Figure 1-Figure 7 As shown, this embodiment also discloses a specific implementation of an array weighing sorting line, including a sorting track 2, a tray assembly 3 and the aforementioned rolling weighing unit 1, the weighing sensor 1a of the rolling weighing unit 1 is arranged on the sorting track 2, and the tray assembly 3 moves along the extension direction of the sorting track 2. Specifically, as Figure 1As shown, there are 22 rolling weighing units 1 and they are symmetrically arranged on both sides of the sorting track 2. The rollers 1b are located between the sorting track 2 and the fixed seat 1g. The rollers 1b on the rolling weighing units 1 are arranged along the extension direction of the sorting track 2, that is, along the extension direction of the sorting track 2, 11 rolling weighing units 1 are arranged on the same side of the sorting track 2, and the 22 rolling weighing units 1 are distributed in an array, and the rollers 1b of the rolling weighing units 1 are all arranged at the same height.

[0068] The wheel spacing between adjacent rollers 1b on the same side of the sorting track 2 can be equal or unequal, and can be set according to actual conditions. In this embodiment, 22 rollers 1b are provided on the same side of the sorting track 2, and the wheel spacing between adjacent rollers 1b is equal.

[0069] In this embodiment, the tray assembly 3 includes a tray 3a. When the tray 3a moves along the extension direction of the sorting track 2 and presses over the roller 1b, the total length that the tray and the roller 1b can contact at the same time is a first length, and the wheel spacing between the first and last rollers 1b on the same side of the sorting track 2 is a second length. The first length is smaller than the second length, so that the array weighing sorting line can realize multiple weighing of the same tray assembly 3 during the movement of the tray assembly 3.

[0070] In other embodiments, the number of rolling weighing units 1 may be 2, 4, 6 or more even numbers, then the number of rolling weighing units 1 located on the same side of the sorting track 2 may be 1, 2, 3 or more, and may be set according to the actual situation based on the size of the tray assembly 3 and the size of the rolling weighing unit 1; the number of rollers 1b of all rolling weighing units 1 is not necessarily the same, and some rolling weighing units 1 may have one roller 1b, and other rolling weighing units 1 may have two rollers 1b, and there may even be a situation where the rolling weighing unit 1 has three rollers 1b or more, that is, the number of all rollers 1b is greater than or equal to the number of all rolling weighing units 1; the roller 1b may also be located on the side of the fixed seat 1g away from the sorting track 2, and may be set according to the actual situation without limitation here.

[0071] In this embodiment, in order to realize the connection between the rolling weighing unit 1 and the sorting track 2, as shown in FIG. Figure 5-Figure 7 As shown, it also includes three support seats 4 and trusses 5, wherein the lower ends of the three support seats 4 are connected to the sorting track 2, and the upper ends of the support seats 4 are connected to form a whole through a horizontally placed truss 5, and the weighing sensor 1a of the rolling weighing unit 1 located on the same side of the sorting track 2 is connected to the upper end surface of the truss 5. Specifically, as Figure 7 As shown, the truss 5 and the first end of the weighing sensor 1a (i.e. Figure 7The left end of the weighing sensor 1a is connected, and the fixing base 1g is connected to the second end of the weighing sensor 1a (i.e. Figure 7 right end of the middle weighing sensor 1a).

[0072] like Fig.14 and Fig.15 As shown, the tray assembly 3 is a two-way flip tray. In addition to the tray 3a, the tray assembly 3 also includes a vertical moving structure fixedly connected to the tray 3a and a base 3b connected to the sorting track 2. The vertical moving structure is connected to the base 3b and can move in the vertical direction. Specifically, a first vertically penetrating guide hole is provided on the base 3b. The vertical moving structure includes a first vertical rod 3c and a first limiting plate 3d vertically connected to the bottom of the tray 3a. The first vertical rod 3c is inserted into the guide hole, and the first vertical rod 3c is a cylinder. The first limiting plate 3d is connected to the end of the first vertical rod 3c away from the tray 3a (i.e. Fig.15 The lower end of the first vertical rod 3c).

[0073] In other embodiments, the end of the first upright rod 3c away from the tray 3a may also be tapered, which will not be described in detail here.

[0074] When the rolling weighing unit 1 weighs the items, the rollers 1b of at least one pair of symmetrically arranged rolling weighing units 1 jointly lift the tray 3a from both sides. Specifically, the rollers 1b of the rolling weighing unit 1 jointly lift the sides of the tray 3a from both sides, and the vertical movable structure is in a lifted state, that is, at this time, the first vertical rod 3c moves upward compared to the initial position, and the first limit plate 3d is closer to the first guide hole on the base 3b.

[0075] When the rolling weighing unit 1 does not weigh items, the roller 1b of the rolling weighing unit 1 is separated from the tray 3a, and the vertical moving structure is in a non-lifting state. At this time, since the tray 3a is no longer subjected to an upward force, the tray 3a drives the first vertical rod 3c to move downward and return to the initial position, and the first limit plate 3d gradually moves away from the guide hole on the base 3b along with the first vertical rod 3c. The weight values ​​of the weighing units are summed to obtain a single weight value.

[0076] In the present embodiment, pairs of rolling weighing units 1 are symmetrically arranged on both sides of the sorting track 2 of the array weighing sorting line. When the pairs of rolling weighing units 1 are weighing, the rollers 1b of the pairs of rolling weighing units 1 will jointly lift the same tray 3a from both sides for weighing, so as to avoid the tray 3a from tilting during weighing and affecting the weighing accuracy.

[0077] This embodiment also discloses a specific implementation of an array weighing method, which is applied to the aforementioned array weighing sorting line, specifically, including a single weighing step, and the single weighing step includes:

[0078] Acquire all rolling weighing units 1 in contact with the tray assembly 3 to form a first set, thereby collecting the rolling weighing units 1 that weigh the items on the tray assembly 3 at a certain moment;

[0079] Determine one by one whether the rolling weighing units 1 in the first set are supporting two tray assemblies 3 at the same time, and if so, delete the rolling weighing units 1 from the first set;

[0080] In the above steps, if the rolling weighing unit 1 supports two tray assemblies 3 at the same time, the weight value of the rolling weighing unit 1 will include the weight of the items on the two tray assemblies 3, so the measured weight value is deleted.

[0081] The weight values ​​of all rolling weighing units in the first set are summed to obtain a single weight value.

[0082] Furthermore, the present embodiment also discloses another specific implementation of the array weighing method, which is applied to the array weighing sorting line of the present embodiment. On the basis of the array weighing method described above in the present embodiment, the single weighing step is repeated at least M times within a preset time, where M≥2 and is an integer. The single weight values ​​obtained each time the single weighing step is executed are averaged to obtain the average weight value of the items on the tray 3a. The value of M can be 2, 3, 4 or 5 times. The larger the value of M, the higher the accuracy of the average weight value of the items on the tray 3a.

[0083] In this embodiment, when there are more than or equal to 2 rolling weighing units 1 located on the same side of the sorting track 2, the single weight values ​​measured at different positions of the same tray 3a can be repeatedly obtained multiple times within a preset time, and then the average value of these single weight values ​​is calculated to obtain the average weight value of the items on the tray 3a, and the weighing accuracy is further improved through multiple measurements.

[0084] In order to make the average weight value obtained more accurate, the rolling weighing unit 1 may be calibrated before weighing.

[0085] [Example 2]

[0086] like Figure 8-Figure 13As shown, Example 2 discloses another specific implementation of a rolling weighing unit 1. Based on Example 1, Example 2 further includes a housing 1e, which covers a fixed seat 1g and a driving mechanism, and a roller 1b is located outside the housing 1e. The housing 1e protects the fixed seat 1g and the driving mechanism from collision. In this embodiment, the housing 1e is a cube, and there is a accommodating space inside the housing 1e. Two holes are provided on one end surface of the housing 1e, and the transmission shaft 1c passes through the holes at corresponding positions of the housing 1e to realize that the roller 1b is arranged outside the housing 1e.

[0087] [Example 3]

[0088] Embodiment 3 discloses another specific implementation of an array-type weighing sorting line. Based on any one of Embodiments 1-2, this embodiment further includes a position sensor, which is disposed on the sorting track 2 and can determine the position of the tray assembly 3 on the sorting track 2. When the tray assembly 3 moves along the sorting track 2, it will first pass through the position sensor and trigger the position sensor, thereby identifying the current position of the tray assembly 3, thereby further improving the weighing accuracy.

[0089] [Example 4]

[0090] like Fig.16 As shown, Example 4 discloses another specific implementation of an array-type weighing sorting line. The structure of Example 4 is basically the same as that of Example 1. The tray assembly 3 of Example 4 is a one-way flip tray. The tray assembly 3 in this embodiment also includes a tray 3a, a vertical moving structure fixedly connected to the tray 3a, and a base 3b connected to the sorting track 2. The vertical moving structure is connected to the base 3b and can move in a direction perpendicular to the base 3b. Specifically, a first vertically penetrating guide hole is provided on the base 3b. The vertical moving structure includes a first vertical rod 3c and a first limiting plate 3d vertically connected to the bottom of the tray 3a. The first vertical rod 3c is inserted into the first guide hole, and the first vertical rod 3c is a cylinder. The first limiting plate 3d is connected to the end of the first vertical rod 3c away from the tray 3a (i.e. Fig.16 The lower end of the first vertical rod 3c).

[0091] In other embodiments, the end of the first upright rod 3c away from the tray 3a may also be tapered, which will not be described in detail here.

[0092] In this embodiment, when the rolling weighing unit 1 weighs the items, the rollers 1b of at least one pair of symmetrically arranged rolling weighing units 1 will also jointly lift the sides of the tray 3a from both sides, which will not be described in detail here.

[0093] [Example 5]

[0094] like Figure 14-15 As shown, Example 5 discloses another specific implementation of the rolling weighing unit 1. On the basis of Example 1 or Example 4, the end of the first vertical rod 3c of Example 5 away from the tray 3a is conical, and a guide cone sleeve 3e is also provided on the base 3b. The guide cone sleeve 3e includes a fixed block and a conical tube arranged on the aforementioned fixed block, and the hollow part of the conical tube passes through the aforementioned fixed block. One side of the fixed block is fixedly attached to the base 3b and the conical tube is inserted in the first guide hole. The first vertical rod 3c is penetrated in the aforementioned hollow part to reduce the collision between the first vertical rod 3c and the base 3b. At the same time, the guide cone sleeve 3e can guide the first vertical rod 3c to reduce the probability of getting stuck here.

[0095] [Example 6]

[0096] like Figure 17-Figure 22 As shown, Example 6 discloses another specific implementation of an array-type weighing sorting line, including a sorting track 2, a tray assembly 3 and the rolling weighing unit 1 shown in Examples 1-2, wherein the tray assembly 3 moves along the extension direction of the sorting track 2. Fig. 20 As shown, there are 44 rolling weighing units 1 and they are symmetrically arranged on both sides of the sorting track 2. The rollers are located between the sorting track 2 and the fixed seat 1g. The rollers 1b on the rolling weighing units 1 are arranged along the extension direction of the sorting track 2 and the rollers 1b of the rolling weighing units 1 are all arranged at the same height. Corresponding to the same position of the sorting track 2, four rolling weighing units 1 are arranged at the sorting track 2, that is, 22 rolling weighing units 1 are arranged on one side of the sorting track 2, and corresponding to the same position of the sorting track 2, a total of 4 rolling weighing units 1 are arranged on both sides of the sorting track 2. In this embodiment, there are two rollers 1b of the rolling weighing unit 1, and the two rollers 1b are arranged at the same height of the fixed seat 1g, so that the two rollers 1b of the same rolling weighing unit 1 can support the tray assembly 3 at the same time.

[0097] Of course, in other embodiments, the rolling weighing unit 1 may not have all two rollers 1b, but may have different numbers. For example, along the extension direction of the sorting track, the rolling weighing unit 1 may have 1 roller, 2 rollers, 2 rollers, 1 roller, 3 rollers, etc. in sequence, that is, the number of all rollers 1b is greater than or equal to the number of all rolling weighing units 1, which can be set according to actual conditions; other numbers but at least two rolling weighing units 1 may also be provided on the same side of the sorting track 2, such as 2, 4, 6 or even more, which can be set according to actual conditions and will not be repeated here.

[0098] like Fig. 22As shown, the tray assembly includes a main base 3h, two symmetrically arranged single-side trays 3f, and a single-side vertical movable structure arranged one by one on the single-side trays 3f, wherein the main base 3h is connected to the sorting track and moves along the extension direction of the sorting track, and a avoidance structure is provided at the position of the roller of the rolling weighing unit corresponding to the main base 3h. In this embodiment, the avoidance structure is an avoidance opening 3k opened on the main base 3h. The single-side vertical movable structure is connected to the main base 3h and the single-side vertical movable structure can move in the vertical direction.

[0099] When the single-sided tray 3f moves along the extension direction of the sorting track 2 and presses over the roller, the smaller value of the total length that the single-sided tray 3f can contact with the roller at the same time is the third length, and the wheel spacing of the first and last rollers 1b located on the corresponding side and at the corresponding height of the sorting track is the fourth length. The third length is smaller than the fourth length, that is, when the total length that the single-sided tray 3f can contact with the roller 1b of the rolling weighing unit 1 located below is the smaller value and serves as the third length. At this time, the rollers 1b of a row of rolling weighing units 1 located below are arranged along the extension direction of the sorting track 2, and the wheel spacing of the first and last rollers 1b among these rollers 1b is the aforementioned fourth length.

[0100] like Fig. 20 and Fig.21 As shown, 22 rolling weighing units 1 are arranged in an array on the side of the sorting track 2. In the embodiment, each row has 11 rolling weighing units 1, and there are two rows in total. The two rows of rolling weighing units 1 are connected to one side of the sorting track 2 through the same support plate 6. Of course, the other side of the sorting track 2 is also arranged in the same way. Specifically, the height of the rolling weighing units 1 in a row close to the sorting track 2 is lower than the height of the rolling weighing units 1 in a row far away from the sorting track 2, thereby achieving that the two rolling weighing units 1 on the same side at the same position of the sorting track 2 can simultaneously support the bottom 31 and the side 3m of the single-sided tray.

[0101] like Fig.19 As shown, when the rolling weighing unit weighs the items, the rollers 1b of the two rolling weighing units 1 located at the corresponding positions of the sorting track jointly lift the single-sided pallet 3f from the bottom 3l of the single-sided pallet and the side 3m of the single-sided pallet respectively. Specifically, the part of the rolling weighing unit 1 in the avoidance opening 3k located at the corresponding position of the sorting track 2 supports the bottom 3l of the single-sided pallet, and the single-sided vertical movable structure is in a lifted state.

[0102] When the rolling weighing unit does not weigh the items, the roller of the rolling weighing unit is separated from the single-sided tray 3f, and the single-sided vertical moving structure is in a non-lifting state.

[0103] The array weighing sorting line of this embodiment can also apply the array weighing method shown in Example 1, which will not be described in detail here.

[0104] [Example 7]

[0105] like Fig. 22 As shown, Example 7 discloses another specific implementation of an array-type weighing sorting line. Based on Example 6, Example 7 has a second vertically penetrating guide hole 3g on the main base 3h of Example 7. The single-side vertical moving structure includes a second vertical rod 3i and a second limit plate 3j vertically connected to the bottom of the single-side tray 3f.

[0106] Specifically, the second vertical rod 3i is inserted into the second guide hole 3g, the second vertical rod 3i is a cylinder, and the second limiting plate 3j is horizontally arranged and connected to the end of the second vertical rod 3i away from the single-side tray 3f (i.e. Fig. 22 The lower end of the second vertical pole 3i).

[0107] [Example 8]

[0108] Example 8 discloses another specific implementation of an array-type weighing sorting line. Based on Example 6 or 7, Example 8 further includes a position sensor, which is arranged on the sorting track and can determine the position of the tray assembly on the sorting track.

[0109] In summary, in addition to the tray assembly in the aforementioned example, other tray assemblies with similar structures can also be applied to the present invention, which will not be described in detail here.

[0110] [Example 9]

[0111] Example 9 discloses another specific implementation of an array weighing sorting line. The structure of Example 9 is basically the same as that of Example 6. The difference between Example 9 and Example 6 is that, Fig.23 As shown, the tray assembly no longer includes two symmetrically arranged single-sided trays 3f, but only includes one single-sided tray 3f.

[0112] At the same time, if Fig.24As shown, there are 22 rolling weighing units and they are arranged on the same side of the sorting track, the rollers are located between the sorting track 2 and the fixed seat 1g, and two rolling weighing units 1 are arranged at the same position of the corresponding sorting track 2. In this embodiment, there are two rollers 1b of the rolling weighing unit 1, and the two rollers 1b are arranged at the same height of the fixed seat 1g, so that the two rollers 1b of the same rolling weighing unit 1 can simultaneously support the bottom 3l of the single-sided tray or the side 3m of the single-sided tray, that is, the two rollers 1b of one rolling weighing unit 1 jointly support the bottom 3l of the single-sided tray, and the two rollers 1b of the other rolling weighing unit 1 jointly support the side 3m of the single-sided tray, thereby weighing the items placed on the single-sided tray 3f.

[0113] In other embodiments, the rolling weighing unit 1 may not have two rollers, but may have different numbers. For example, along the extension direction of the sorting track 2, the rolling weighing unit 1 may have 1 roller, 2 rollers, 2 rollers, 1 roller, 3 rollers, etc., which can be set according to actual conditions. The number of rolling weighing units located on the same side of the sorting track 2 can also be adjusted according to actual conditions, which will not be repeated here.

Claims

1. A rolling weighing unit, comprising a weighing sensor arranged on a sorting track, characterized in that: Also includes: A fixing seat, the fixing seat is arranged on the weighing sensor; A roller, the roller having a wheel surface, the roller being rotatably connected to the fixing seat and the axis of the roller being arranged horizontally; A driving mechanism, wherein the driving mechanism drives the roller to rotate around its own axis; When the rolling weighing unit weighs the items on the tray assembly, the rotational linear speed of the roller is consistent with the linear speed of the tray assembly, and the rolling weighing unit is in stable contact with the tray assembly.

2. The rolling weighing unit according to claim 1, characterized in that: There is at least one roller. When there are two or more rollers, all the rollers are arranged at the same height of the fixing seat.

3. The rolling weighing unit according to claim 1, characterized in that: The roller is rotatably connected to the fixing seat via a transmission shaft, and the roller rotates synchronously with the transmission shaft; The driving mechanism is a driving motor, a power output shaft of the driving motor is connected to the transmission shaft through a gear transmission mechanism, and the transmission shaft is rotatably connected to the fixing seat through a bearing seat.

4. The rolling weighing unit according to claim 3, characterized in that: The gear transmission mechanism comprises: A driving gear, the driving gear is connected to the power output shaft of the driving motor and the driving gear rotates synchronously with the power output shaft of the driving motor; The driven gears are connected to the transmission shafts one by one, the driven gears drive the corresponding transmission shafts to rotate synchronously, and the driven gears are meshed with the driving gears for transmission.

5. The rolling weighing unit according to claim 4, characterized in that: It also includes a first nut and a second nut threadedly connected to the transmission shaft, wherein two ends of the first nut respectively abut against the driven gear and the roller, and the second nut is located on a side of the roller away from the fixing seat and an end of the second nut abuts against the roller.

6. An array weighing sorting line, comprising a sorting track, a tray assembly and the rolling weighing unit according to claim 1, wherein the tray assembly moves along the extension direction of the sorting track, characterized in that: The rolling weighing units are multiple and symmetrically arranged on both sides of the sorting track, and the rollers on the rolling weighing units are arranged along the extension direction of the sorting track; The tray assembly comprises a tray, a vertical moving structure fixedly connected to the tray, and a base connected to the sorting track, wherein the vertical moving structure is connected to the base and can move in a vertical direction; When the rolling weighing unit weighs the item, the rollers of at least one pair of symmetrically arranged rolling weighing units jointly lift the tray from both sides, and the vertical moving structure is in a lifted state; When the rolling weighing unit does not weigh items, the rollers of the rolling weighing unit are separated from the tray, and the vertical moving structure is in a non-lifting state.

7. The array weighing sorting line according to claim 6, characterized in that: Along the extension direction of the sorting track, at least two rolling weighing units are provided on one side of the sorting track, the number of all the rollers is greater than or equal to the number of all the rolling weighing units, and the rollers of the rolling weighing units are all arranged at the same height; When the tray moves along the extension direction of the sorting track and presses over the roller, the total length that the tray and the roller can contact at the same time is a first length, and the wheel spacing between the first and last rollers on the same side of the sorting track is a second length, and the first length is smaller than the second length.

8. The array weighing sorting line according to claim 6, characterized in that: The base is provided with a first guide hole which is vertically penetrated; The vertical moving structure comprises: A first vertical rod vertically connected to the bottom of the tray, the first vertical rod is inserted into the first guide hole, the first vertical rod is a cylinder or one end of the first vertical rod away from the tray is conical; A first limiting plate is connected to an end of the first vertical rod away from the tray.

9. The array weighing sorting line according to claim 6, characterized in that: Also includes: A position sensor is arranged on the sorting track and can determine the position of the tray assembly.

10. An array weighing sorting line, comprising a sorting track, a tray assembly and the rolling weighing unit according to claim 1, wherein the tray assembly moves along the extending direction of the sorting track, characterized in that: There are several rolling weighing units, which are arranged on the same side of the sorting track or symmetrically on both sides of the sorting track. The rollers on the rolling weighing units are arranged along the extension direction of the sorting track. At least two rolling weighing units are arranged on the same side of the sorting track. The tray assembly comprises: A main base, the main base is connected to the sorting track and moves along the extension direction of the sorting track, and a avoidance structure is provided at the position of the main base corresponding to the roller of the rolling weighing unit; One single-sided tray or two symmetrically arranged single-sided trays; A single-sided vertical movable structure is arranged on the single-sided tray in a one-to-one correspondence, the single-sided vertical movable structure is connected to the main base and can move along the vertical direction; When the rolling weighing unit weighs the items, the rollers of the two rolling weighing units located at the corresponding positions of the sorting track respectively lift the single-sided tray from the bottom and side of the single-sided tray, and the single-sided vertical movable structure is in a lifted state; When the rolling weighing unit does not weigh items, the roller of the rolling weighing unit is separated from the single-sided tray, and the single-sided vertical movable structure is in a non-lifting state.

11. The array weighing sorting line according to claim 10, characterized in that: Along the extension direction of the sorting track, at least four rolling weighing units are provided on a single side of the sorting track, the rolling weighing units are an even number, and the number of all the rollers is greater than or equal to the number of all the rolling weighing units; When the single-sided tray moves along the extension direction of the sorting track and presses over the roller, the smaller value of the total length that the single-sided tray and the roller can contact at the same time is the third length, and the wheel spacing between the first and last rollers at the corresponding side and corresponding height of the sorting track is the fourth length, and the third length is smaller than the fourth length.

12. The array weighing sorting line according to claim 10, characterized in that: The main base is provided with a second guide hole which is vertically penetrating; The unilateral vertical moving structure comprises: A second vertical rod vertically connected to the bottom of the single-sided tray, the second vertical rod is inserted into the second guide hole, and the second vertical rod is a cylinder; A second limiting plate is connected to an end of the second vertical rod away from the single-sided tray.

13. The array weighing sorting line according to claim 10, characterized in that: Also includes: A position sensor is arranged on the sorting track and can determine the position of the tray assembly.

14. The array weighing sorting line according to claim 10, characterized in that: The avoidance structure is an avoidance opening opened on the main base. When the rolling weighing unit weighs the items, the part of the rolling weighing unit located in the avoidance opening at the corresponding position of the sorting track supports the bottom of the single-sided tray.

15. An array weighing method, applied to the array weighing sorting line according to any one of claims 6 to 14, characterized in that: The method comprises a single weighing step, wherein the single weighing step comprises: Acquire all the rolling weighing units in contact with the tray assembly to form a first set; Determine one by one whether the rolling weighing units in the first set are supporting two tray assemblies at the same time, and if so, delete the rolling weighing units from the first set; The weight values ​​of all the rolling weighing units in the first set are summed to obtain a single weight value.

16. The array weighing method according to claim 15, characterized in that: Repeat the single weighing step at least M times within a preset time, where M≥2; The single weight values ​​obtained by each single weighing step are averaged to obtain the average weight value of the items on the pallet.

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