Rolling type weighing unit and array type weighing sorting line

Abstract

The utility model discloses a rolling type weighing unit and an array type weighing sorting line. 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 for weighing in the rolling process, the tray assembly is not prone to falling off. 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] This utility model relates to the field of sorting and weighing lines, and further to a rolling weighing unit and an array weighing sorting line. Background Technology

[0002] With the rapid development of e-commerce in recent years, the daily volume of express deliveries across the country is increasing daily. To improve the sorting efficiency of express items, express sorting centers have introduced sorting systems. These systems require sorting and weighing express items one by one. Existing technology discloses a dynamic weighing pallet and a sorting machine with it (patent publication number CN221335489U). Its weighing principle involves a weighing track lifting a lifting shaft, which in turn lifts the pallet body located on it, thus achieving the weighing of the items. However, because the lifting shaft needs to move vertically in a short period, the pallet body is prone to shaking, which further reduces the weighing accuracy. Furthermore, some items are very light, weighing only a few grams to a dozen grams, and existing weighing solutions cannot meet their weight accuracy requirements, failing to achieve the goal of accurately measuring small-weight items. Utility Model Content

[0003] The purpose of this invention is to provide a rolling weighing unit and an array weighing sorting line to solve the technical problem that existing technologies cannot accurately weigh small-weight express packages. It can accurately measure items weighing only a few grams to a dozen grams, thereby improving the weighing accuracy of the sorting and weighing system.

[0004] To achieve the above objectives, this utility model provides a rolling weighing unit, including a weighing sensor disposed on a sorting track, and further including: a fixed base, the fixed base being disposed on the weighing sensor; a roller, the roller having a wheel surface, the roller being rotatably connected to the fixed base and the axis of the roller being horizontally arranged; and a driving mechanism, the driving mechanism driving the roller to rotate around its own axis; when the rolling weighing unit weighs items on a pallet assembly, the rotational linear velocity of the roller is consistent with the linear velocity of the pallet assembly, and the rolling weighing unit makes smooth contact with the pallet assembly.

[0005] In some embodiments, there is at least one roller, and when there are two or more rollers, all rollers are positioned at the same height on the mounting base.

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

[0007] In some embodiments, the gear transmission mechanism includes: a driving gear connected to the power output shaft of the drive motor and rotating synchronously with the power output shaft of the drive motor; and driven gears connected one-to-one to the transmission shafts, the driven gears driving the corresponding transmission shafts to rotate synchronously, and the driven gears meshing with the driving gears.

[0008] In some embodiments, the rolling weighing unit further includes a first nut and a second nut threadedly connected to the drive shaft, the two ends of the first nut respectively abutting against the driven gear and the roller, and the second nut located on the side of the roller away from the fixed base with its end abutting against the roller.

[0009] This utility model also provides an array-type weighing sorting line, including a sorting track, a pallet assembly, and the aforementioned rolling weighing unit. The pallet assembly moves along the extension direction of the sorting track. Several rolling weighing units are 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 pallet assembly includes a pallet, a vertically moving structure fixedly connected to the pallet, and a base connected to the sorting track. The vertically moving structure is connected to the base and can move vertically. When the rolling weighing unit weighs items, at least one pair of symmetrically arranged rollers of the rolling weighing units lift the pallet from both sides, and the vertically moving structure is in a raised state. When the rolling weighing unit does not weigh items, the rollers of the rolling weighing unit separate from the pallet, and the vertically moving structure is in a non-raised state.

[0010] In some embodiments, 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 rollers is greater than or equal to the number of all rolling weighing units, and the rollers of the rolling weighing units are all set at the same height; when the pallet travels along the extension direction of the sorting track and passes over the rollers, the total length of the pallet and the rollers that can contact each other simultaneously 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, wherein the first length is less than the second length.

[0011] In some embodiments, the base is provided with a vertically penetrating first guide hole; the vertical moving structure includes: a first upright rod vertically connected to the bottom of the tray, the first upright rod passing through the first guide hole, the first upright rod being cylindrical or the end of the first upright rod away from the tray being tapered; and a first limiting plate connected to the end of the first upright rod away from the tray.

[0012] In some implementations, the array-type weighing sorting line further includes a position sensor disposed on the sorting track, which is capable of determining the position of the pallet assembly.

[0013] This utility model also provides another array-type weighing sorting line, including a sorting track, a pallet assembly, and the aforementioned rolling weighing units. The pallet assembly moves along the extension direction of the sorting track. Several rolling weighing units are arranged on the same side of the sorting track or symmetrically on both sides of the sorting track. Rollers on the rolling weighing units are arranged along the extension direction of the sorting track, and at least two rolling weighing units are provided on the same side of the sorting track. The pallet assembly includes a main base connected to the sorting track and moving along the extension direction of the sorting track. The main base has buffers at positions corresponding to the rollers of the rolling weighing units. The structure includes: a single-sided tray or two symmetrically arranged single-sided trays; a single-sided vertical moving structure corresponding to each single-sided tray, the single-sided vertical moving structure being connected to the main base and capable of moving vertically; when the rolling weighing unit weighs the items, the rollers of the two rolling weighing units located at corresponding positions on the sorting track jointly lift the single-sided tray from the bottom and side, respectively, and the single-sided vertical moving structure is in a raised 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 moving structure is in a non-raised state.

[0014] In some embodiments, along the extension direction of the sorting track, at least four rolling weighing units are provided on one side of the sorting track, the number of rolling weighing units is even, and the total number of all rollers is greater than or equal to the total number of all rolling weighing units; when the single-sided pallet travels along the extension direction of the sorting track and passes over the rollers, the smaller of the total lengths in which the single-sided pallet and the rollers can contact each other simultaneously is the third length, and the wheel spacing between the first and last rollers on the corresponding side and at the corresponding height of the sorting track is the fourth length, and the third length is less than the fourth length.

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

[0016] In some implementations, the array-type weighing sorting line further includes a position sensor disposed on the sorting track, which is capable of determining the position of the pallet assembly.

[0017] In some embodiments, the clearance structure is a clearance opening on the main base, and when the rolling weighing unit weighs the items, the portion of the rolling weighing unit within the clearance opening located at the corresponding position on the sorting track supports the bottom of the single-sided tray.

[0018] Compared with the prior art, the rolling weighing unit and array weighing sorting line provided by this utility model have the following advantages:

[0019] 1. The rolling weighing unit and array weighing sorting line provided by this utility model have rollers that rotate under the drive of a drive mechanism. The pallet assembly moves along the sorting track at a specified linear speed. By controlling the linear speed of the rollers of the rolling weighing unit to be equal to the linear speed of the pallet assembly, the vibration of the pallet when it contacts the pallet of the pallet assembly during weighing is offset when the weighing unit is rolling. This maintains the stability of the pallet during the weighing process, thereby improving the weighing accuracy and enabling precise measurement of items weighing only a few grams to tens of grams.

[0020] 2. The rolling weighing unit and array weighing sorting line provided by this utility model, when the rolling weighing unit has two or more rollers, can simultaneously contact and lift the pallet during weighing, thereby further improving the stability and weighing accuracy during the weighing process.

[0021] 3. The rolling weighing unit and array weighing sorting line provided by this utility model, wherein a pair of rolling weighing units are symmetrically arranged on both sides of the sorting track of the array weighing sorting line. When the pair of rolling weighing units are weighing, the rollers of the pair of rolling weighing units will lift the same pallet from both sides for weighing. At this time, the pallet assembly is a one-way flipping pallet or a two-way flipping pallet to avoid the pallet tilting during weighing and affecting the weighing accuracy.

[0022] 4. The rolling weighing unit and array weighing sorting line provided by this utility model include an array weighing sorting line comprising a pallet assembly having one single-sided pallet or two symmetrically arranged single-sided pallets. When the pallet assembly moves to the rolling weighing unit, the single-sided pallet can be weighed jointly by the two rolling weighing units at the corresponding positions. One rolling weighing unit's roller supports the bottom of the single-sided pallet, while the other rolling weighing unit's roller supports the side of the single-sided pallet. When the pallet assembly has two single-sided pallets, the weighing efficiency is doubled because both single-sided pallets can be weighed simultaneously.

[0023] 5. The rolling weighing unit and array weighing sorting line provided by this utility model can repeatedly acquire the single weight value measured at different positions of the same pallet or a single-sided pallet within a preset time. Then, the average value of these single weight values ​​is calculated to obtain the average weight value of the items on the pallet or single-sided pallet. The weighing accuracy is further improved by multiple measurements. Attached Figure Description

[0024] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0025] Figure 1 This is a schematic diagram of an array-type weighing sorting line;

[0026] Figure 2 This is a side view of an array-type weighing sorting line;

[0027] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0028] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0029] Figure 5 This is a schematic diagram of multiple rolling weighing units, support bases, and trusses located on one side of the sorting track;

[0030] Figure 6 yes Figure 5 Front view;

[0031] Figure 7 yes Figure 5 Side view;

[0032] Figure 8 This is a three-dimensional schematic diagram of a rolling weighing unit;

[0033] Figure 9 This is a side view of the rolling weighing unit;

[0034] Figure 10 This is a side view of the rolling weighing unit without its outer casing.

[0035] Figure 11 yes Figure 10 A sectional view along the CC direction;

[0036] Figure 12 This is a three-dimensional schematic diagram of the rolling weighing unit viewed from one angle after the outer shell is removed;

[0037] Figure 13This is a three-dimensional schematic diagram of the rolling weighing unit viewed from another angle after the outer shell is removed;

[0038] Figure 14 This is a three-dimensional schematic diagram of the first type of tray assembly;

[0039] Figure 15 yes Figure 14 Side view of the tray assembly;

[0040] Figure 16 This is a side view of the second type of tray assembly;

[0041] Figure 17 This is a schematic diagram of another type of array-type weighing sorting line;

[0042] Figure 18 yes Figure 17 Cross-sectional view along the DD direction;

[0043] Figure 19 yes Figure 18 A magnified view of a section at point E in the middle;

[0044] Figure 20 This is a schematic diagram of multiple rolling weighing units and support plates located on one side of the sorting track;

[0045] Figure 21 yes Figure 20 Side view;

[0046] Figure 22 This is a 3D schematic diagram of the third type of tray assembly;

[0047] Figure 23 This is a structural diagram of the fourth type of pallet assembly;

[0048] Figure 24 This is a magnified view of the fourth type of pallet assembly during weighing.

[0049] Explanation of icon numbers:

[0050] 1-Rolling weighing unit, 1a-Weighing sensor, 1b-Roller, 1c-Drive shaft, 1d-Second nut, 1e-Housing shell, 1f-First nut, 1g-Fixed seat, 1h-Drive motor, 1i-Bearing seat, 1j-Driven gear, 1k-Driven gear, 2-Sorting track, 3-Pattern assembly, 3a-Pattern, 3b-Base, 3c-First upright, 3d-First limiting plate, 3e-Guide cone sleeve, 3f-Single-sided tray, 3g-Second guide hole, 3h-Main base, 3i-Second upright, 3j-Second limiting plate, 3k-Allowing opening, 3l-Bottom of single-sided tray, 3m-Side of single-sided tray, 4-Support seat, 5-Truss, 6-Support plate. Detailed Implementation

[0051] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0052] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0053] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0054] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056]

Example 1

[0057] like Figures 8-13 As shown in Embodiment 1, a specific implementation of a rolling weighing unit 1 is disclosed, which includes a weighing sensor 1a, a fixed base 1g, a roller 1b, and a driving mechanism. The fixed base 1g is mounted on the weighing sensor 1a, and the roller 1b has a wheel surface and is rotatably connected to the fixed base 1g. The axis of the roller 1b is horizontally oriented. 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, the rolling weighing unit 1 has two rollers 1b, and both rollers 1b are positioned at the same height on the fixed base 1g. The two rollers 1b can simultaneously contact and lift the tray 3a during weighing, thereby further improving the stability and weighing accuracy during the weighing process.

[0058] When the rolling weighing unit 1 weighs the items on the pallet assembly 3, the rotational linear velocity of the roller 1b is consistent with the linear velocity of the pallet assembly 3, and the rolling weighing unit 1 and the pallet assembly 3 make smooth contact.

[0059] In other embodiments, the rolling weighing unit 1 may also be provided with only one roller 1b, three rollers 1b or even more; the surface of the roller 1b may also have a certain roughness or be inclined, which will not be described in detail here.

[0060] like Figure 12 As shown, roller 1b is rotatably connected to fixed base 1g via drive shaft 1c, and roller 1b is fixedly connected to drive shaft 1c, so that roller 1b and drive shaft 1c rotate synchronously. Specifically, drive shaft 1c is rotatably connected to fixed base 1g via bearing housing 1i.

[0061] The aforementioned drive mechanism is a drive motor 1h, and the power output shaft of the drive motor 1h is connected to the transmission shaft 1c via a gear transmission mechanism. Specifically, as shown... Figures 11-12 As shown, the gear transmission mechanism includes a driving gear 1k and a driven gear 1j. The driving gear 1k is connected to the power output shaft of the drive motor 1h, and the driving gear 1k rotates synchronously with the power output shaft of the drive motor 1h. The driven gears 1j are connected one-to-one with the transmission shafts 1c, and the driven gears 1j drive the corresponding transmission shafts 1c to rotate synchronously. The driven gears 1j mesh with the driving gears 1k. When the power output shaft of the drive motor 1h rotates, it first drives the driving gear 1k to rotate, then the driving gear 1k drives the meshed driven gear 1j 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 are the same size and mesh with the same driving gear 1k. Therefore, the two driven gears 1j will rotate synchronously with the same rotational speed and direction.

[0062] Of course, in other embodiments, the drive mechanism can also drive the roller 1b to rotate through other transmission mechanisms, such as belt drive, chain rotation, etc., which will not be elaborated here.

[0063] like Figure 10 and Figure 12 As shown, the rolling weighing unit 1 also includes a first nut 1f and a second nut 1d threadedly connected to the transmission shaft 1c. The two ends of the first nut 1f abut against the driven gear 1j and the roller 1b, respectively. 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. Thus, the second nut 1d presses the roller 1b against the end face of the first nut 1f. The first nut 1f is positioned between the driven gear 1j and the roller 1b, which can separate the two and prevent them from contacting each other.

[0064] In this embodiment, the roller 1b of the rolling weighing unit 1 rotates under the drive of the drive mechanism, and the pallet assembly 3 moves along the sorting track 2 at a specified linear speed. By controlling the linear speed of the roller 1b of the rolling weighing unit 1 to be equal to the linear speed of the pallet assembly 3, when the weighing unit contacts the pallet 3a of the pallet assembly 3 for weighing during rolling, the shaking of the pallet 3a when it contacts the roller 1b will be offset, thus improving the stability of the pallet 3a during the weighing process and improving the weighing accuracy, enabling precise measurement of items weighing only a few grams to tens of grams.

[0065] like Figures 1-7 As shown, this embodiment also discloses a specific implementation of an array-type weighing sorting line, including a sorting track 2, a pallet assembly 3, and the aforementioned rolling weighing unit 1. The weighing sensor 1a of the rolling weighing unit 1 is disposed on the sorting track 2, and the pallet assembly 3 moves along the extending direction of the sorting track 2. Specifically, as... Figure 1 As shown, there are 22 rolling weighing units 1 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 unit 1 are arranged along the extension direction of the sorting track 2. That is, along the extension direction of the sorting track 2, there are 11 rolling weighing units 1 on the same side of the sorting track 2. The 22 rolling weighing units 1 are arranged in an array, and the rollers 1b of the rolling weighing unit 1 are all set at the same height.

[0066] The wheel spacing between adjacent rollers 1b on the same side of the sorting track 2 can be equal or unequal, depending on the actual situation. 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.

[0067] In this embodiment, the pallet assembly 3 includes a pallet 3a. When the pallet 3a travels along the extension direction of the sorting track 2 and passes over the roller 1b, the total length of the pallet and the roller 1b that can contact each other at the same time is the first length. The wheel spacing between the first and last rollers 1b on the same side of the sorting track 2 is the second length. The first length is less than the second length, so the array-type weighing sorting line can weigh the same pallet assembly 3 multiple times during the movement of the pallet assembly 3.

[0068] In other embodiments, the number of rolling weighing units 1 can also be an even number, such as 2, 4, 6 or more. Then, the number of rolling weighing units 1 located on the same side of the sorting track 2 can be 1, 2, 3 or more, which can be set according to the actual situation based on the size of the pallet 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. Some rolling weighing units 1 can have one roller 1b, while others can have two rollers 1b, or even three or more rollers 1b. That is, the total number of rollers 1b is greater than or equal to the total number of rolling weighing units 1. The rollers 1b can also be located on the side of the fixed seat 1g away from the sorting track 2, which can be set according to the actual situation and is not limited here.

[0069] In this embodiment, in order to connect the rolling weighing unit 1 to the sorting track 2, as follows: Figures 5-7 As shown, it also includes three support bases 4 and a truss 5. The lower ends of the three support bases 4 are connected to the sorting track 2, and the upper ends of the support bases 4 are connected as a whole by a horizontally placed truss 5. 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 surface of the truss 5. Specifically, as... Figure 7 As shown, the first end of the truss 5 and the weighing sensor 1a (i.e. Figure 7 The left end of the load cell 1a is connected, and the fixing base 1g is connected to the second end of the load cell 1a (i.e., the left end of the load cell 1a). Figure 7 (Right end of the weighing sensor 1a).

[0070] like Figure 14 and Figure 15 As shown, the pallet assembly 3 is a bidirectional flipping pallet. Besides the pallet 3a, the pallet assembly 3 also includes a vertically moving structure fixedly connected to the pallet 3a and a base 3b connected to the sorting track 2. The vertically moving structure is connected to the base 3b and can move vertically. Specifically, the base 3b has a vertically penetrating first guide hole. The vertically moving structure includes a first upright 3c and a first limiting plate 3d vertically connected to the bottom of the pallet 3a. The first upright 3c passes through the guide hole and is cylindrical. The first limiting plate 3d is connected to the end of the first upright 3c furthest from the pallet 3a (i.e., the end opposite to the pallet 3a). Figure 15 (Lower end of the first upright post 3c).

[0071] In other embodiments, the end of the first upright 3c away from the tray 3a may also be tapered, which will not be described in detail here.

[0072] When the rolling weighing unit 1 weighs the item, at least one pair of rollers 1b of the symmetrically arranged rolling weighing unit 1 jointly lift the tray 3a from both sides. Specifically, the rollers 1b of the rolling weighing unit 1 jointly lift the side of the tray 3a from both sides, and the vertical moving structure is in a raised state. That is, at this time, the first upright 3c moves upward relative to the initial position, and the first limiting plate 3d is closer to the first guide hole on the base 3b.

[0073] When the rolling weighing unit 1 is not weighing the item, the roller 1b of the rolling weighing unit 1 is separated from the tray 3a, and the vertical moving structure is in a non-lifted state. At this time, since the tray 3a is no longer subjected to an upward force, the tray 3a drives the first upright 3c to move downward and return to its initial position. The first limiting plate 3d gradually moves away from the guide hole on the base 3b along with the first upright 3c. The single weight value is obtained by summing the weight values ​​of the weighing units.

[0074] In this embodiment, the sorting track 2 of the array-type weighing sorting line is symmetrically arranged with pairs of rolling weighing units 1 on both sides. When weighing, the rollers 1b of the pairs of rolling weighing units 1 will lift the same pallet 3a from both sides to weigh it, so as to avoid the pallet 3a tilting during weighing and affecting the weighing accuracy.

[0075] This embodiment also discloses a specific implementation of an array-type weighing method, applied to the aforementioned array-type weighing sorting line. Specifically, it includes a single weighing step, which includes:

[0076] All rolling weighing units 1 that come into contact with the pallet assembly 3 are collected to form a first set, thereby collecting the rolling weighing units 1 that weigh the items on the pallet assembly 3 at a certain moment.

[0077] Determine one by one whether the rolling weighing unit 1 in the first set is simultaneously supporting two pallet assemblies 3. If so, delete the rolling weighing unit 1 from the first set.

[0078] In the above steps, if the rolling weighing unit 1 supports two pallet 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 pallet assemblies 3. Therefore, the measured weight value is deleted.

[0079] The weight values ​​of all rolling weighing units in the first set are summed to obtain the single weight value.

[0080] Furthermore, this embodiment also discloses another specific implementation of the array-type weighing method, applied to the sorting line of this embodiment's array-type weighing. Based on the array-type weighing method described above in this embodiment, the single weighing step is repeated at least M times within a preset time, where M ≥ 2 and is an integer. The average weight value obtained from each single weighing step is calculated to obtain the average weight value of the items on pallet 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 pallet 3a.

[0081] In this embodiment, when there are two or more rolling weighing units 1 on the same side of the sorting track 2, the single weight value measured at different positions of the same pallet 3a can be repeatedly obtained multiple times within a preset time. Then, the average value of these single weight values ​​is calculated to obtain the average weight value of the items on the pallet 3a. The weighing accuracy is further improved by multiple measurements.

[0082] To make the average weight value more accurate, the rolling weighing unit 1 can be calibrated and adjusted before weighing.

[0083]

Example 2

[0084] like Figures 8-13 As shown, Embodiment 2 discloses another specific implementation of the rolling weighing unit 1. Based on Embodiment 1, Embodiment 2 further includes a housing 1e, which covers the fixed base 1g and the drive mechanism. The roller 1b is located outside the housing 1e, and the housing 1e protects the fixed base 1g and the drive mechanism from collisions. In this embodiment, the housing 1e is a cube with an internal accommodating space, and two holes are opened on one end face of the housing 1e. The drive shaft 1c passes through the holes at corresponding positions and exits the housing 1e, thereby positioning the roller 1b outside the housing 1e.

[0085]

Example 3

[0086] Example 3 discloses another specific implementation of an array-type weighing sorting line. Based on any of the examples in Examples 1-2, this example further includes a position sensor. The position sensor is set on the sorting track 2 and can determine the position of the pallet assembly 3 on the sorting track 2. When the pallet assembly 3 moves along the sorting track 2, it will first pass by the position sensor and trigger the position sensor, thereby identifying the current position of the pallet assembly 3, thus further improving the weighing accuracy.

[0087]

Example 4

[0088] like Figure 16As shown, Embodiment 4 discloses another specific implementation of an array-type weighing sorting line. Embodiment 4 has a structure basically the same as Embodiment 1. The pallet assembly 3 in Embodiment 4 is a one-way flipping pallet. The pallet assembly 3 in this embodiment also includes a pallet 3a, a vertically moving structure fixedly connected to the pallet 3a, and a base 3b connected to the sorting track 2. The vertically moving structure is connected to the base 3b and can move along a direction perpendicular to the base 3b. Specifically, the base 3b has a vertically penetrating first guide hole. The vertically moving structure includes a first upright 3c vertically connected to the bottom of the pallet 3a and a first limiting plate 3d. The first upright 3c passes through the first guide hole and is cylindrical. The first limiting plate 3d is connected to the end of the first upright 3c away from the pallet 3a (i.e.,...). Figure 16 (Lower end of the first upright post 3c).

[0089] In other embodiments, the end of the first upright 3c away from the tray 3a may also be tapered, which will not be described in detail here.

[0090] In this embodiment, when the rolling weighing unit 1 weighs the item, the rollers 1b of at least one pair of symmetrically arranged rolling weighing units 1 will also lift the sides of the tray 3a from both sides, which will not be described in detail here.

[0091]

Example 5

[0092] like Figures 14-15 As shown, Embodiment 5 discloses another specific implementation of the rolling weighing unit 1. Based on Embodiment 1 or Embodiment 4, the end of the first upright 3c away from the tray 3a in Embodiment 5 is tapered, and a guide cone sleeve 3e is also provided on the base 3b. The guide cone sleeve 3e includes a fixing block and a tapered tube disposed on the aforementioned fixing block. The hollow part of the tapered tube passes through the aforementioned fixing block. One side of the fixing block is fixedly attached to the base 3b, and the tapered tube is inserted into the first guide hole. The first upright 3c passes through the aforementioned hollow part, reducing the collision between the first upright 3c and the base 3b. At the same time, the guide cone sleeve 3e can guide the first upright 3c, reducing the probability of it getting stuck here.

[0093]

Example 6

[0094] like Figures 17-22 As shown, Embodiment 6 discloses another specific implementation of an array-type weighing sorting line, including a sorting track 2, a pallet assembly 3, and a rolling weighing unit 1 as shown in Embodiments 1-2. The pallet assembly 3 moves along the extension direction of the sorting track 2. Figure 20As shown, there are 44 rolling weighing units 1 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 are all set at the same height. Corresponding to the same position on the sorting track 2, there are four rolling weighing units 1 at the sorting track 2, that is, there are 22 rolling weighing units 1 on one side of the sorting track 2, and a total of 4 rolling weighing units 1 are set on both sides of the sorting track 2 at the same position. In this embodiment, there are two rollers 1b of the rolling weighing unit 1, and the two rollers 1b are set 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 pallet assembly 3.

[0095] Of course, in other embodiments, the rolling weighing unit 1 may not always have two rollers 1b, or it 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., 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 the actual situation. The same side of the sorting track 2 may also have other numbers but at least two rolling weighing units 1, such as 2, 4, 6 or even more, which can be set according to the actual situation, and will not be elaborated here.

[0096] like Figure 22 As shown, the pallet assembly includes a main base 3h, two symmetrically arranged single-sided pallets 3f, and corresponding single-sided vertical moving structures on each single-sided pallet 3f. The main base 3h is connected to the sorting track and moves along the extension direction of the sorting track. A clearance structure is provided at the position of the roller of the rolling weighing unit corresponding to the position of the main base 3h. In this embodiment, the clearance structure is a clearance opening 3k formed on the main base 3h. The single-sided vertical moving structure is connected to the main base 3h and can move vertically.

[0097] When a single-sided pallet 3f travels along the extension direction of the sorting track 2 and presses against the rollers, the smaller of the total lengths in which the single-sided pallet 3f and the rollers can simultaneously contact each other is the third length. The wheel spacing between the first and last rollers 1b on the corresponding side and at the corresponding height of the sorting track is the fourth length. The third length is less than the fourth length. That is, when the total length in which the single-sided pallet 3f and the rollers 1b of the rolling weighing unit 1 located below can simultaneously contact each other is the smaller value and is taken as the third length, at this time, the rollers 1b of the row of rolling weighing units 1 located below are arranged along the extension direction of the sorting track 2, and the wheel spacing between the first and last rollers 1b of these rollers 1b is the aforementioned fourth length.

[0098] like Figure 20 and Figure 21 As shown, 22 rolling weighing units 1 are arranged in an array on the side of the sorting track 2. In this embodiment, each row has 11 rolling weighing units 1, and there are two rows in total. Both rows of rolling weighing units 1 are connected to one side of the sorting track 2 by 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 row of rolling weighing units 1 closer to the sorting track 2 is relatively lower than the height of the row of rolling weighing units 1 farther away from the sorting track 2. This allows two rolling weighing units 1 located at the same position on the same side of the sorting track 2 to simultaneously support the bottom 3l and the side 3m of a single-sided pallet.

[0099] like Figure 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 on the sorting track lift the single-sided pallet 3f from the bottom 3l and the side 3m of the single-sided pallet, respectively. Specifically, the part of the rolling weighing unit 1 within the clearance 3k located at the corresponding position on the sorting track 2 supports the bottom 3l of the single-sided pallet, and the single-sided vertical moving structure is in a raised state.

[0100] When the rolling weighing unit is not weighing the items, the rollers of the rolling weighing unit are separated from the single-sided tray 3f, and the single-sided vertical moving structure is in a non-lifted state.

[0101] The array-type weighing sorting line of this embodiment can also use the array-type weighing method shown in Embodiment 1, which will not be repeated here.

[0102]

Example 7

[0103] like Figure 22 As shown, Embodiment 7 discloses another specific implementation of an array-type weighing sorting line. Based on Embodiment 6, Embodiment 7 has a vertically penetrating second guide hole 3g on its main base 3h. The single-sided vertical moving structure includes a second upright 3i and a second limiting plate 3j vertically connected to the bottom of the single-sided tray 3f.

[0104] Specifically, the second upright 3i passes through the second guide hole 3g. The second upright 3i is cylindrical. The second limiting plate 3j is horizontally arranged and connected to the end of the second upright 3i away from the single-sided tray 3f (i.e., Figure 22 (Lower end of the second upright 3i).

[0105]

Example 8

[0106] 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 set on the sorting track and can determine the position of the pallet assembly on the sorting track.

[0107] In summary, in addition to the tray assembly of the example mentioned above, other tray assemblies with similar structures can also be applied to this utility model, which will not be elaborated here.

[0108]

Example 9

[0109] Example 9 discloses another specific implementation of an array-type weighing sorting line. Example 9 has a basically the same structure as Example 6, but differs from Example 6 in that, as... Figure 23 As shown, the tray assembly no longer includes two symmetrically arranged single-sided trays 3f, but only one single-sided tray 3f.

[0110] At the same time, such as Figure 24 As shown, there are 22 rolling weighing units 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 provided at the same position on the sorting track 2. In this embodiment, the rolling weighing unit 1 has two rollers 1b, and the two rollers 1b are set at the same height of the fixed seat 1g. Thus, the two rollers 1b of the same rolling weighing unit 1 can simultaneously support the bottom 3l or the side 3m of a single-sided pallet. That is, the two rollers 1b of one rolling weighing unit 1 jointly support the bottom 3l of a single-sided pallet, and the two rollers 1b of the other rolling weighing unit 1 jointly support the side 3m of a single-sided pallet, thereby weighing the items placed on the single-sided pallet 3f.

[0111] In other embodiments, the rolling weighing unit 1 may not always have two rollers, or it may have different numbers of rollers. 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 the actual situation. The number of rolling weighing units located on the same side of the sorting track 2 can also be adjusted according to the actual situation, which will not be elaborated here.

Claims

1. A rolling weighing unit comprising a weighing sensor arranged in a sorting track, characterized in that, Also includes: A mounting base is provided on the load cell; A roller having a wheel surface, the roller being rotatably connected to the fixed base and the axis of the roller being horizontally set; A drive mechanism that drives the roller to rotate around its own axis; When the rolling weighing unit weighs the items on the pallet assembly, the rotational linear velocity of the roller is consistent with the linear velocity of the pallet assembly, and the rolling weighing unit makes smooth contact with the pallet assembly.

2. A rolling weighing cell according to claim 1, characterized in that There is at least one roller, and when there are two or more rollers, all rollers are positioned at the same height on the fixed base.

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

4. A rolling weighing cell according to claim 3, characterised in that, The gear transmission mechanism includes: A drive 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; Driven gears are connected one-to-one to the transmission shafts. Each driven gear drives the corresponding transmission shaft to rotate synchronously, and the driven gear meshes with the driving gear for transmission.

5. A rolling weighing unit according to claim 4, characterized in that It also includes a first nut and a second nut threadedly connected to the drive shaft. The two ends of the first nut abut against the driven gear and the roller, respectively. 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.

6. An array-type weighing sorting line, comprising a sorting track, a pallet assembly, and a rolling weighing unit as described in claim 1, wherein the pallet assembly moves along the extension direction of the sorting track, characterized in that: The rolling weighing unit consists of several units and is symmetrically arranged on both sides of the sorting track. The rollers on the rolling weighing unit are arranged along the extension direction of the sorting track. The pallet assembly includes a pallet, a vertically moving structure fixedly connected to the pallet, and a base connected to the sorting track. The vertically moving structure is connected to the base and can move in a vertical direction. When the rolling weighing unit weighs the item, at least one pair of rollers of the symmetrically arranged rolling weighing unit lift the tray from both sides, and the vertical moving structure is in a raised state. When the rolling weighing unit is not weighing the items, the rollers of the rolling weighing unit are separated from the tray, and the vertical moving structure is in a non-lifted state.

7. The array-type 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 rollers is greater than or equal to the number of all rolling weighing units, and the rollers of the rolling weighing units are all set at the same height. When the pallet travels along the extension direction of the sorting track and passes over the rollers, the total length of the pallet and the rollers that can contact each other simultaneously is the first length, and the wheel spacing between the first and last rollers on the same side of the sorting track is the second length, wherein the first length is less than the second length.

8. The array-type weighing sorting line according to claim 6, characterized in that: The base is provided with a vertically penetrating first guide hole; The vertical moving structure includes: A first upright is vertically connected to the bottom of the tray. The first upright passes through the first guide hole. The first upright is cylindrical or the end of the first upright away from the tray is tapered. A first limiting plate is connected to the end of the first upright that is away from the tray.

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

10. An array-type weighing sorting line, comprising a sorting track, a pallet assembly, and a rolling weighing unit as described in claim 1, wherein the pallet assembly moves along the extension direction of the sorting track, characterized in that: The rolling weighing unit comprises several units, which are arranged on the same side of the sorting track or symmetrically arranged on both sides of the sorting track. The rollers on the rolling weighing unit are arranged along the extension direction of the sorting track, and at least two rolling weighing units are provided on the same side of the sorting track. The tray assembly includes: A main base is connected to the sorting track and moves along the extension direction of the sorting track. The main base is provided with a clearance structure at the position of the roller of the rolling weighing unit. One single-sided tray or two symmetrically arranged single-sided trays; A one-to-one vertical moving structure is provided on the single-sided tray, the single-sided vertical moving structure is connected to the main base and the single-sided vertical moving structure 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 on the sorting track lift the single-sided pallet from the bottom and side of the single-sided pallet, respectively, and the single-sided vertical moving structure is in a raised state. When the rolling weighing unit is not weighing the items, the rollers of the rolling weighing unit are separated from the single-sided tray, and the single-sided vertical moving structure is in a non-lifted state.

11. The array-type 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 one side of the sorting track. The number of rolling weighing units is even, and the total number of all rollers is greater than or equal to the total number of all rolling weighing units. When the single-sided pallet travels along the extension direction of the sorting track and passes over the roller, the smaller of the total lengths in which the single-sided pallet and the roller can contact each other simultaneously is the third length, and the wheel spacing between the first and last rollers at the corresponding side and height of the sorting track is the fourth length, and the third length is less than the fourth length.

12. The array-type weighing sorting line according to claim 10, characterized in that: The base is provided with a vertically penetrating second guide hole; The unilateral vertical moving structure includes: A second upright is vertically connected to the bottom of the single-sided tray, the second upright passes through the second guide hole, and the second upright is cylindrical; The second limiting plate is connected to the end of the second upright that is away from the single-sided tray.

13. The arrayed weighed sorting line of claim 10, wherein, Also includes: A position sensor is installed on the sorting track to determine the position of the pallet assembly.

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

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