A test calibration system for an electronic scale product

Abstract

The application discloses a kind of test calibration systems for electric scale product, it is related to electric scale product test technical field.The application includes two test lines, hoisting frame, weight hoisting device and product transfer device, test line includes feeding platform, deviation rectification table, calibration table and discharge platform arranged in order from front to back, and notch is equipped in the middle of calibration table.The application constructs a set of full-process unmanned automatic test calibration system from automatic feeding of electric scale product, automatic deviation rectification positioning, impact-free transfer placement, automatic weight loading test to automatic discharge by the synergic cooperation of multilayer self-propelled vehicle hoisting architecture, product transfer device and lifter, anti-swing reinforced weight hoisting device, mechanical locking clamp structure and the diversification scheme of product moving piece, each functional module is in cooperation orderly, action is closely linked, and high-precision test and calibration operation can be continuously completed without manual intervention, and production efficiency and test consistency are significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of electric scale product testing technology, and in particular relates to a testing and calibration system for electric scale products. Background Technology

[0002] Electric scales must undergo rigorous precision testing and calibration before leaving the factory to ensure their weighing accuracy and product consistency. Traditional manual testing methods suffer from low efficiency, poor accuracy, and large human error, and can no longer meet the needs of modern large-scale production.

[0003] Currently, automated testing systems in the industry typically use conveyor belts in conjunction with robotic arms for product handling and weight loading, but these systems have the following shortcomings in practical applications: 1. Difficulty in maintaining product positioning accuracy during transportation: After the product is corrected and positioned, when the robot grips or picks up the product for transportation, the product often undergoes slight secondary displacement due to uneven gripping force, motion inertia, or mechanical vibration, which destroys the positioning accuracy after correction and directly affects the accuracy of subsequent test results.

[0004] 2. Hard impact during product placement: When the robotic arm places the product on the test platform, it usually uses a direct release method, resulting in a hard impact between the bottom of the product and the platform. This may not only damage the precision sensors inside the scale, but also introduce random stress and strain due to the impact, leading to inconsistent initial conditions for each test. This requires setting an additional static stabilization time, which reduces test efficiency.

[0005] Third, the swaying problem during the hoisting of weights is prominent: In order to adapt to the testing of electric scales with different ranges, it is necessary to frequently pick up and put down standard weights of different specifications. The weights are relatively heavy. During the hoisting at height and horizontal movement, the inertial force generated during start-up and stop will cause the weights to sway significantly. This not only affects the positioning accuracy of the weights, but also poses a safety hazard of the weights falling off.

[0006] Fourth, the safety and reliability of the weight gripping mechanism are insufficient: conventional clamps mostly rely on clamping force and friction to hold the weights, which poses a risk of weight falling off during acceleration, deceleration or unexpected power failure, and lacks a reliable mechanical locking mechanism.

[0007] 5. Difficulty in re-grabbing the product after testing: After the product is placed directly on a solid table for testing, its bottom surface is tightly attached to the table surface, making it difficult for the robotic arm to re-insert and grab it from the bottom. Often, it is necessary to open an ejection hole on the table surface or add an additional ejector mechanism, which increases the structural complexity.

[0008] Therefore, how to provide a fully automated, highly accurate product positioning, and stable and reliable weight lifting and calibration system for electric scale testing has become a technical problem that needs to be solved in this field. Summary of the Invention

[0009] The purpose of this invention is to provide a testing and calibration system for electric scale products. Through the coordinated operation of a multi-layer self-propelled vehicle hoisting architecture, a product transfer device and a lifting device, an anti-sway reinforced weight hoisting device, a mechanically locked clamping structure, and a variety of product transfer solutions, a fully unmanned automatic testing and calibration system is constructed, which includes automatic feeding, automatic correction and positioning, impact-free transfer and placement, automatic weight loading and testing, and automatic unloading of electric scale products. The functional modules work together in an orderly manner and the actions are closely linked. High-precision testing and calibration operations can be continuously completed without human intervention, which significantly improves production efficiency and testing consistency.

[0010] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention is a testing and calibration system for electric scale products, comprising two test lines, a hoisting frame, a weight hoisting device, and a product transfer device; The test line includes a feeding platform, a correction platform, a calibration platform and a discharge platform arranged from front to back. The calibration platform has a notch in the middle, and a lifting device is fixed in the notch. Several calibration weights are linearly arranged between the two test lines; The hoisting frame includes a set of workshop frames. The two workshop frames are respectively arranged in parallel outside the two test lines. A layer of self-propelled vehicle is slidably connected to the top of the two workshop frames. Two layers of self-propelled vehicles are slidably connected to both sides of the top of the first layer of self-propelled vehicles. A front three-layer self-propelled vehicle and a rear three-layer self-propelled vehicle are slidably connected to the top ends of the second layer of self-propelled vehicles, respectively. The product transfer device includes a conveyor belt mechanism installed at the bottom of the front three-layer self-propelled vehicle, a vertical electric cylinder installed on two threaded sections of the conveyor belt mechanism, and a product transfer component installed at the end of the telescopic rod of the vertical electric cylinder. The conveyor belt mechanism is used to drive the two vertical electric cylinders to move relative to each other or in opposite directions. The weight lifting device includes an anti-sway cylinder installed at the bottom of the rear three-layer self-propelled vehicle and an electrically controlled clamp installed at the end of the telescopic rod of the anti-sway cylinder.

[0011] Furthermore, the feeding platform, the correction platform, and the discharge platform are all conveyor belt devices. The correction platform is equipped with moving electric cylinders on both sides, and the end of the telescopic rod of the moving electric cylinder is equipped with a correction push plate. The top of the correction platform near the calibration platform is equipped with a baffle.

[0012] Furthermore, a cage-type reinforcing frame is fixed to the outside of the cylinder body of the anti-sway electric cylinder. The cage-type reinforcing frame includes side plates symmetrically arranged on both sides of the anti-sway electric cylinder. Several stiffening plates that cooperate with the peripheral side of the anti-sway electric cylinder are fixed to the inner side of the side plates. Several locking shafts are linearly fixed on both sides between two adjacent side plates. The top of the anti-sway cylinder is hinged to a hinge seat, which is fixed to the bottom of the rear three-layer self-propelled vehicle via an adapter seat. The tops of the two side plates extend beyond the anti-sway cylinder and form extensions. Vibration damping blocks are fixed to the tops of both sides of the two extensions, and the tops of the four vibration damping blocks are in contact with the bottom surface of the hinge seat's base plate.

[0013] Furthermore, rectangular openings are provided on both sides of the extension, and limiting plates are fixed on both sides of the adapter. Fixing blocks are fixed on both sides of the inner side of the bottom edge of the limiting plates. The fixing blocks are embedded in the rectangular openings and form a small gap with the rectangular openings.

[0014] Furthermore, the electrically controlled clamp includes a base plate installed at the end of the telescopic rod of the anti-sway cylinder. A locking sleeve is fixed in the middle of the bottom surface of the base plate. The locking sleeve has an oblong inner cavity. A double-ended screw is rotatably connected through the top of the locking sleeve. A servo motor connected to one end of the double-ended screw is fixed on the bottom surface of the base plate. Clamping fingers are threadedly connected to the two threaded sections of the double-ended screw. A slide rail is fixed on the bottom surface of the base plate. The top of the clamping fingers is slidably connected to the slide rail. A pin is fixed on the inner side of each of the two clamping fingers. An external opening is provided on both sides of the locking sleeve, which is concentric with the pin.

[0015] Furthermore, each of the aforementioned calibration weights has a locking shaft fixed to its top. The locking shaft has a waist-shaped cross-section and an inner opening. When the locking sleeve is fitted onto the locking shaft, the inner opening and the outer opening are concentrically distributed.

[0016] Furthermore, the product transfer component is a product support edge or a pneumatic suction cup.

[0017] Furthermore, sliding contact line guide rails are fixed to the top of the workshop frame, the front and rear sides of the top of the first-floor self-propelled vehicle, and the left and right sides of the second-floor self-propelled vehicle. The first-floor self-propelled vehicle, the second-floor self-propelled vehicle, the front-mounted third-floor self-propelled vehicle, and the rear-mounted third-floor self-propelled vehicle slide along their corresponding sliding contact line guide rails via current collectors.

[0018] Furthermore, the telescopic rod end of the lifting device is fixed with a support surface. When the lifting device is in the extended state, the support surface is higher than the upper surface of the calibration platform, and when the lifting device is in the retracted state, the support surface is lower than the upper surface of the calibration platform.

[0019] Furthermore, the extension direction of the conveyor belt mechanism is perpendicular to the length direction of the test line, and the extension direction of the product support edge is parallel to the length direction of the test line.

[0020] Furthermore, it also includes a main control cabinet, and a sub-controller is provided on the first-floor self-propelled vehicle. The sub-controller is electrically connected to the main control cabinet, and the anti-sway electric cylinder, electric control clamp, conveyor belt mechanism and vertical electric cylinder are all electrically connected to the sub-controller.

[0021] Furthermore, the single-layer self-propelled vehicle, the double-layer self-propelled vehicle, the front-mounted triple-layer self-propelled vehicle, and the rear-mounted triple-layer self-propelled vehicle all include a frame and a vehicle drive mechanism mounted on the frame, and several of the vehicle drive mechanisms are electrically connected to the sub-controller.

[0022] Furthermore, each of the three self-propelled vehicles (one-layer, two-layer, front-mounted three-layer, and rear-mounted) is equipped with a lidar, which is electrically connected to the sub-controller.

[0023] Furthermore, a vision system is fixed to the outside of the anti-sway cylinder by a bracket, and the vision system is electrically connected to the sub-controller.

[0024] Furthermore, a maintenance hoist is mounted on the outer side of the frame of the two-story self-propelled vehicle.

[0025] The present invention has the following beneficial effects: 1. This invention constructs a fully automated, unmanned testing and calibration system that integrates multi-layer self-propelled vehicle hoisting architecture, coordinated product transfer devices and lifters, anti-sway reinforced weight hoisting device, mechanically locked clamping structure, and diverse product transfer solutions. This system covers the entire process from automatic feeding, automatic deviation correction and positioning, impact-free transfer and placement, automatic weight loading and testing to automatic unloading of electric scale products. The functional modules work together in an orderly manner with close coordination of actions, enabling continuous high-precision testing and calibration without human intervention, significantly improving production efficiency and testing consistency.

[0026] 2. This invention utilizes a combination design of a product transfer device and a built-in lifter on the calibration platform. After the product is precisely positioned on the correction platform, the product transfer device uses its conveyor belt mechanism and symmetrical L-shaped product support edges to lift the product from both sides of the bottom with completely symmetrical and uniform force, rather than using traditional clamping. This fundamentally avoids product displacement during the gripping process and ensures absolute stability during transfer. Subsequently, the product is transferred as a whole to the top of the calibration platform. At this point, the lifter rises first and actively receives the product, while the product transfer device then retracts, forming a seamless relay. This active, gapless handover method ensures that the product's horizontal position remains unchanged from self-correction and positioning until it lands on the calibration platform, greatly guaranteeing the accuracy of subsequent tests.

[0027] 3. This invention independently deploys the product transfer and weight lifting functions on a front-mounted three-layer self-propelled vehicle and a rear-mounted three-layer self-propelled vehicle. The two are parallel on the same level but completely independent. During the product's slow descent and testing process, the weight lifting device can simultaneously reset the previous test weight and select the next test weight, minimizing the auxiliary time within the testing cycle and realizing an efficient and continuous automated testing and calibration process. Moreover, the entire product testing and calibration process is unmanned, achieving highly efficient automation.

[0028] 4. This invention, through the slow-descent function of the lifter, eliminates the traditional method of directly airdropping or rigidly placing the product on the platform using a robotic arm. After the support surface of the lifter receives the product, the lifter retracts at a controllable low speed, causing the product to descend slowly and smoothly until the bottom surface of the product gently contacts the upper surface of the calibration platform. The slow-descent process completely avoids hard impacts, effectively protecting the precision sensors inside the scale. At the same time, since the product falls at a uniform speed and horizontally with the support surface, random strain caused by impact is eliminated, ensuring that the initial conditions for each test are completely consistent, eliminating the waiting time, and improving the test cycle and the reproducibility of the results.

[0029] 5. Through the design of the lifting device, the product is smoothly lifted by the support surface after the test, so that a gap is formed between the bottom surface of the product and the upper surface of the calibration platform. The gap actively created provides a precise working space for the two product support edges of the product transfer device to smoothly insert and lift the product from both sides of the bottom. The placement and retrieval functions are perfectly integrated into the lifting device, simplifying the calibration platform structure and enhancing the compactness and reliability of the system.

[0030] 6. This invention effectively suppresses the swaying problem during the hoisting of heavy-duty weights by using an anti-sway electric cylinder in conjunction with a cage-type reinforcing frame. The cage-type reinforcing frame tightly wraps the cylinder body with side plates, stiffeners, and locking shafts, greatly enhancing the overall bending stiffness of the electric cylinder assembly. The damping block at the top of the extension fits into the bottom surface of the hinge base plate to form a flexible damping contact, absorbing the vibration energy during start-up and shutdown. At the same time, the tiny gap between the fixed block and the rectangular through-hole forms a hard limit during large swings, realizing a rigid-flexible sway suppression mechanism and ensuring the stability and positioning accuracy of the weight hoisting.

[0031] 7. This invention achieves rapid, accurate, and reliable locking of the weights through a waist-shaped locking structure between the electrically controlled clamp and the calibrated weights. The cooperation between the waist-shaped inner cavity and the waist-shaped locking shaft enables circumferential automatic centering. The servo motor drives the double-headed screw to simultaneously pass through the outer and inner openings of the clamping fingers, forming a mechanical-level limit lock that does not rely on friction. Even in the event of an accidental power outage, the weights will not fall off, fundamentally eliminating the safety hazard of weights falling off during hoisting and ensuring that there is no swaying during hoisting.

[0032] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a testing and calibration system for electric scale products according to the present invention; Figure 2 A structural diagram of all structures on a single two-story self-propelled vehicle; Figure 3 This is a schematic diagram of the correction platform. Figure 4 This is a schematic diagram of the calibration platform. Figure 5 This is a structural diagram of a rear-mounted three-layer self-propelled vehicle and a weight lifting device; Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 for Figure 5 A magnified view of a section at point B in the middle; Figure 8 A schematic diagram of the anti-sway cylinder and a limiting plate; Figure 9 This is a schematic diagram of the calibration weights; Figure 10 This is a schematic diagram of a front-mounted three-layer self-propelled and product transfer device. Figure 11 A structural diagram showing the location of the hoist; The attached diagram lists the components represented by each number as follows: 1-Test line, 2-Weight hoisting device, 3-Product transfer device, 4-Calibration weight, 5-Workshop frame, 6-First-floor self-propelled vehicle, 7-Second-floor self-propelled vehicle, 8-Front-mounted three-floor self-propelled vehicle, 9-Rear-mounted three-floor self-propelled vehicle, 10-Main control cabinet, 11-Sub-controller, 12-LiDAR, 13-Maintenance hoist, 101-Feeding platform, 102-Correction platform, 103-Calibration platform, 104-Discharge platform, 105-Notch, 106-Lifter, 107-Moving electric cylinder, 108-Correction push plate, 109-Support surface, 201-Anti-sway electric cylinder, 202-Electrically controlled clamp, 203- 204-Vision system, 205-Side plate, 206-Firming plate, 207-Locking shaft, 208-Hinge, 209-Adapter, 210-Extension, 211-Vibration damping block, 212-Rectangular through-hole, 213-Limiting plate, 214-Fixing block, 215-Seat plate, 216-Locking sleeve, 217-Oval inner cavity, 218-Double-ended screw, 219-Servo motor, 220-Clamping finger, 221-Pin, 222-Outer opening, 223-Slide rail, 301-Conveyor belt mechanism, 302-Vertical electric cylinder, 303-Product support edge, 401-Locking shaft, 402-Inner opening. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1-10 As shown, the present invention is a testing and calibration system for electric scale products, including two test lines 1, a hoisting frame, a weight hoisting device 2, and a product transfer device 3; Test line 1 includes a feeding platform 101, a correction platform 102, a calibration platform 103 and a discharge platform 104 arranged from front to back. The calibration platform 103 has a notch 105 in the middle, and a lifter 106 is fixed inside the notch 105. Several calibration weights 4 are linearly arranged between the two test lines 1; The hoisting frame includes a set of workshop frames 5. The two workshop frames 5 are respectively set in parallel outside the two test lines 1. A layer of self-propelled vehicle 6 is slidably connected to the top of the two workshop frames 5. A second layer of self-propelled vehicle 7 is slidably connected to both sides of the top of the first layer of self-propelled vehicle 6. A front three-layer self-propelled vehicle 8 and a rear three-layer self-propelled vehicle 9 are slidably connected to the top ends of the second layer of self-propelled vehicle 7, respectively. The product transfer device 3 includes a conveyor belt mechanism 301 installed at the bottom of the front three-layer self-propelled vehicle 8, a vertical electric cylinder 302 installed on two threaded sections of the conveyor belt mechanism 301, and a product transfer component installed at the end of the telescopic rod of the vertical electric cylinder 302. The conveyor belt mechanism 301 is used to drive the two vertical electric cylinders 302 to move relative to each other or move in opposite directions. The conveyor belt mechanism 301 includes a driving pulley driven by a motor, a driven pulley and an auxiliary pulley. A belt body is set on all the pulleys. A track is also set on the bottom surface of the front three-layer self-propelled vehicle 8. The top of the vertical electric cylinder 302 slides with the track through a slider, and the slider is fixed to the side of the belt body to ensure that the two vertical electric cylinders 302 move relative to each other or move in opposite directions. The weight lifting device 2 includes an anti-sway cylinder 201 installed at the bottom of the rear three-layer self-propelled vehicle 9 and an electrically controlled clamp 202 installed at the end of the telescopic rod of the anti-sway cylinder 201.

[0037] Among them, such as Figure 1-3 As shown, the feeding platform 101, the correction platform 102, and the discharge platform 104 are all conveyor belt devices. The correction platform 102 is equipped with moving electric cylinders 107 on both sides. The end of the telescopic rod of the moving electric cylinder 107 is equipped with a correction push plate 108. The top of the correction platform 102 near the calibration platform 103 is equipped with a baffle (not shown in the figure). The baffle can be a fixed baffle or a lifting baffle for product positioning. At the same time, a proximity switch, a distance sensor, or a grating structure can be installed on the correction platform 102 to determine the front and rear position of the product.

[0038] Among them, such as Figure 5-6 and Figure 8 As shown, a cage-type reinforcing frame is fixed to the outside of the cylinder body of the anti-sway electric cylinder 201. The cage-type reinforcing frame includes side plates 205 symmetrically arranged on both sides of the anti-sway electric cylinder 201. Several stiffening plates 206 that cooperate with the circumferential side of the anti-sway electric cylinder 201 are fixed to the inner side of the side plates 205. Several locking shafts 207 are linearly fixed on both sides between adjacent side plates 205. The top of the anti-sway cylinder 201 is hinged to a hinge seat 208. The hinge seat 208 is fixed to the bottom of the rear three-layer self-propelled vehicle 9 through an adapter seat 209. The top of the two side plates 205 extends beyond the anti-sway cylinder 201 and forms an extension 210. The top of the two sides of the extension 210 is fixed with a damping block 211. The top of the four damping blocks 211 are all in contact with the bottom surface of the base plate of the hinge seat 208.

[0039] Among them, such as Figure 8 As shown, rectangular openings 212 are provided on both sides of the extension 210, and limiting plates 213 are fixed on both sides of the adapter 209. Fixing blocks 214 are fixed on both sides of the inner side of the bottom edge of the limiting plate 213. The fixing blocks 214 are embedded in the rectangular openings 212 and form a small gap with the rectangular openings 212.

[0040] Among them, such as Figure 7and Figure 9 As shown, the electric control clamp 202 includes a base plate 215 installed at the end of the telescopic rod of the anti-sway cylinder 201. A locking sleeve 216 is fixed in the middle of the bottom surface of the base plate 215. The locking sleeve 216 has an inner waist-shaped cavity 217. A double-ended screw 218 is rotatably connected through the top of the locking sleeve 216. A servo motor 219 connected to one end of the double-ended screw 218 is fixed on the bottom surface of the base plate 215. Clamping fingers 220 are threadedly connected to the two threaded sections of the double-ended screw 218. A slide rail 223 is fixed on the bottom surface of the base plate 215. The top of the clamping fingers 220 is slidably connected to the slide rail 223. Pins 221 are fixed inside the two clamping fingers 220. The locking sleeve 216 has an outer opening 222 on both sides that is concentric with the pins 221.

[0041] Among them, such as Figure 9 As shown, a number of calibration weights 4 are fixed with locking shafts 401 on their tops. The locking shafts 401 have an oblong cross-section and an inner opening 402. When the locking sleeve 216 is fitted onto the locking shafts 401, the inner opening 402 and the outer opening 222 are concentrically distributed.

[0042] Among them, the product moving component is the product support edge 303 or a pneumatic suction cup; The pneumatic suction cup adsorbs the product from the top. An air pump is installed on the front three-layer self-propelled vehicle 8. The air inlet of the air pump is connected to the pneumatic suction cup through pipelines and valve groups. The pipelines are equipped with pressure valves and check valves to control the air intake. The pipelines are distributed along the vertical electric cylinder 302. At the same time, the valve groups and the air pump are electrically connected to the sub-controller.

[0043] Among them, such as Figure 1-2 As shown, sliding contact line guide rails are fixed to the top of the workshop frame 5, the front and rear sides of the top of the first-floor self-propelled vehicle 6, and the left and right sides of the second-floor self-propelled vehicle 7. The first-floor self-propelled vehicle 6, the second-floor self-propelled vehicle 7, the front-mounted third-floor self-propelled vehicle 8, and the rear-mounted third-floor self-propelled vehicle 9 slide with their corresponding sliding contact line guide rails through the current collector.

[0044] Among them, such as Figure 1-2 As shown, the telescopic rod end of the lifting device 106 is fixed with a support surface 109. When the lifting device 106 is in the extended state, the support surface 109 is higher than the upper surface of the calibration platform 103. When the lifting device 106 is in the retracted state, the support surface 109 is lower than the upper surface of the calibration platform 103.

[0045] The conveyor belt mechanism 301 extends perpendicularly to the length direction of the test line 1, while the product support edge 303 extends parallel to the length direction of the test line 1.

[0046] Among them, such as Figure 1As shown, it also includes a main control cabinet 10, and a sub-controller 11 is provided on the first-floor self-propelled vehicle 6. The sub-controller 11 is electrically connected to the main control cabinet 10. The anti-sway electric cylinder 201, the electric control clamp 202, the conveyor belt mechanism 301 and the vertical electric cylinder 302 are all electrically connected to the sub-controller 11.

[0047] Among them, the single-layer self-propelled vehicle 6, the double-layer self-propelled vehicle 7, the front-mounted triple-layer self-propelled vehicle 8, and the rear-mounted triple-layer self-propelled vehicle 9 all include a frame and a vehicle drive mechanism mounted on the frame, and several vehicle drive mechanisms are electrically connected to the sub-controller 11.

[0048] The workshop frame 5, the first-floor self-propelled vehicle 6, and the second-floor self-propelled vehicle 7 are all equipped with self-propelled guide rails on their outer sides. The vehicle driving mechanism is either a friction wheel driven by a motor or a gear driven by a motor. When the vehicle driving mechanism is a friction wheel driven by a motor, the friction wheel presses against the self-propelled guide rail and rolls along the self-propelled guide rail. When the vehicle driving mechanism is a gear driven by a motor, a rack that meshes with the gear is installed on the self-propelled guide rail.

[0049] Among them, such as Figure 1 As shown, a lidar 12 is fixed on the first-layer self-propelled vehicle 6, the second-layer self-propelled vehicle 7, the front-mounted three-layer self-propelled vehicle 8, and the rear-mounted three-layer self-propelled vehicle 9. The lidar 12 is electrically connected to the sub-controller 11.

[0050] Among them, such as Figure 1-2 As shown, a vision system 204 is fixed to the outside of the anti-sway electric cylinder 201 via a bracket 203, and the vision system 204 is electrically connected to the sub-controller 11.

[0051] Among them, such as Figure 1 and Figure 11 As shown, a maintenance hoist 13 is mounted on the outside of the frame of the two-story self-propelled vehicle 7.

[0052] The working principle of this invention is as follows: The working process of this system is as follows: 1. Feeding and correction: The AGV trolley transfers the scale product to be tested onto the feeding platform 101. The feeding platform 101 conveys the product forward to the correction platform 102. The front of the product is blocked by a baffle. Then, the moving electric cylinders 107 on the left and right sides drive the correction push plate 108 to push out simultaneously, accurately centering the product. After the correction is completed, the push plate retracts and the baffle descends.

[0053] The front three-layer self-propelled cart 8 of the product transfer device 3 moves to the top of the alignment platform 102 with the cooperation of the multi-layer carts. The conveyor belt mechanism 301 adjusts the distance between the two product support edges 303 to be slightly larger than the product width. The vertical electric cylinder 302 extends to lower the product support edges 303 to the bottom height of the product on both sides. Then, the conveyor belt mechanism 301 inserts the product support edges into the bottom of the product again. The vertical electric cylinder 302 retracts upward to lift the product. The entire product transfer device 3 moves laterally to the top of the calibration platform 103 with the cooperation of the first and second layer self-propelled carts. The lifter 106 is in the extended state. The support surface 109 is above the platform. The vertical electric cylinder 302 descends and places the product smoothly on the support surface 109. The product support edges 303 retract. The lifter 106 slowly retracts. The product slowly descends until it sits on the upper surface of the calibration platform 103. The lifter 106 continues to retract to the low position so that the product is completely supported by the calibration platform 103.

[0054] The rear three-layer self-propelled vehicle 9 of the weight lifting device 2 moves to the array of calibration weights 4 between the two test lines 1. The vision system 204 identifies the position of the target weight, the anti-sway cylinder 201 descends, and the electric clamp 202 picks up the selected weight. Then, the rear three-layer self-propelled vehicle 9 moves to the top of the product, the anti-sway cylinder 201 accurately lowers the weight, and the electric clamp 202 releases, completing the weight loading. The external testing system calibrates and tests the accuracy of the scale.

[0055] After the test is completed, the weight lifting device 2 re-clamps the weight and puts it back in its original position. The lifter 106 extends again, and the support surface 109 rises to lift the product, causing the product to detach from the calibration table 103. The front three-layer self-propelled vehicle 8 of the product transfer device 3 drives the product support edge 303 to insert into the bottom of the product and lift the product. After a series of displacements, it moves to the top of the discharge platform 104 and places the product on the conveyor belt. The discharge platform 104 transports the product downstream, completing one work cycle.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A testing and calibration system for electric scales, characterized in that: It includes two test lines (1), a hoisting frame, a weight hoisting device (2), and a product transfer device (3). The test line (1) includes a feeding platform (101), a correction platform (102), a calibration platform (103) and a discharge platform (104) arranged from front to back. The calibration platform (103) has a notch (105) in the middle, and a lifter (106) is fixed in the notch (105). Several calibration weights (4) are linearly arranged between the two test lines (1); The hoisting frame includes a set of workshop frames (5), and the two workshop frames (5) are respectively arranged in parallel outside the two test lines (1). A layer of self-propelled vehicle (6) is slidably connected to the top of the two workshop frames (5). A second layer of self-propelled vehicle (7) is slidably connected to both sides of the top of the first layer of self-propelled vehicle (6). A front three-layer self-propelled vehicle (8) and a rear three-layer self-propelled vehicle (9) are slidably connected to the top ends of the second layer of self-propelled vehicle (7). The product transfer device (3) includes a conveyor belt mechanism (301) installed at the bottom of the front three-layer self-propelled vehicle (8), a vertical electric cylinder (302) installed on two threaded sections of the conveyor belt mechanism (301), and a product transfer component installed at the end of the telescopic rod of the vertical electric cylinder (302). The conveyor belt mechanism (301) is used to drive the two vertical electric cylinders (302) to move relative to each other or move in opposite directions. The weight hoisting device (2) includes an anti-sway cylinder (201) installed at the bottom of the rear three-layer self-propelled vehicle (9) and an electric control clamp (202) installed at the end of the telescopic rod of the anti-sway cylinder (201).

2. The testing and calibration system for electric scales according to claim 1, characterized in that, The feeding platform (101), the correction platform (102) and the discharge platform (104) are all conveyor belt devices. The correction platform (102) is equipped with a moving electric cylinder (107) on both sides. The end of the telescopic rod of the moving electric cylinder (107) is equipped with a correction push plate (108). The top of the correction platform (102) near the calibration platform (103) is equipped with a baffle.

3. The testing and calibration system for electric scales according to claim 1, characterized in that, The anti-sway electric cylinder (201) has a cage-type reinforcing frame fixed to the outside of the cylinder body. The cage-type reinforcing frame includes side plates (205) symmetrically arranged on both sides of the anti-sway electric cylinder (201). Several stiffening plates (206) that cooperate with the circumferential side of the anti-sway electric cylinder (201) are fixed on the inner side of the side plates (205). Several locking shafts (207) are linearly fixed on both sides between two adjacent side plates (205). The anti-sway cylinder (201) is hinged to a hinge seat (208) at its top. The hinge seat (208) is fixed to the bottom surface of the rear three-layer self-propelled vehicle (9) via an adapter seat (209). The tops of the two side plates (205) extend beyond the anti-sway cylinder (201) and form extensions (210). Both sides of the two extensions (210) are fixed with damping blocks (211). The tops of the four damping blocks (211) are all in contact with the bottom surface of the hinge seat (208).

4. The testing and calibration system for electric scales according to claim 3, characterized in that, The extension (210) has rectangular openings (212) on both sides, and the adapter (209) has a limiting plate (213) fixed on both sides. The limiting plate (213) has a fixing block (214) fixed on both sides of the bottom inner side. The fixing block (214) is embedded in the rectangular opening (212) and forms a small gap with the rectangular opening (212).

5. The testing and calibration system for electric scales according to claim 1, characterized in that, The electrically controlled clamp (202) includes a base plate (215) installed at the end of the telescopic rod of the anti-sway cylinder (201). A locking sleeve (216) is fixed in the middle of the bottom surface of the base plate (215). The locking sleeve (216) has a waist-shaped inner cavity (217). A double-headed screw (218) is rotatably connected through the top of the locking sleeve (216). A servo motor (219) connected to one end of the double-headed screw (218) is fixed on the bottom surface of the base plate (215). Clamping fingers (220) are threadedly connected to the two threaded sections of the double-headed screw (218). A slide rail (223) is fixed on the bottom surface of the base plate (215). The top of the clamping fingers (220) is slidably connected to the slide rail (223). A pin (221) is fixed on the inner side of each of the two clamping fingers (220). An outer opening (222) is provided on both sides of the locking sleeve (216) and is concentrically opposite to the pin (221).

6. A testing and calibration system for electric scales according to claim 5, characterized in that, Each of the calibration weights (4) has a locking shaft (401) fixed on its top. The locking shaft (401) has a waist-shaped cross-section and an inner opening (402) on it. When the locking sleeve (216) is fitted onto the locking shaft (401), the inner opening (402) and the outer opening (222) are concentrically distributed.

7. The testing and calibration system for electric scales according to claim 1, characterized in that, The product transfer component is a product support edge (303) or a pneumatic suction cup.

8. A testing and calibration system for electric scales according to claim 1, characterized in that, The workshop frame (5) is fixed with a sliding contact line guide rail on the top, one side of the top of the first-floor self-propelled vehicle (6), and one side of the second-floor self-propelled vehicle (7). The first-floor self-propelled vehicle (6), the second-floor self-propelled vehicle (7), the front three-floor self-propelled vehicle (8), and the rear three-floor self-propelled vehicle (9) slide with their corresponding sliding contact line guide rails through a current collector.

9. A testing and calibration system for electric scales according to claim 1, characterized in that, The telescopic rod end of the lifting device (106) is fixed with a support surface (109). When the lifting device (106) is in the extended state, the support surface (109) is higher than the upper surface of the calibration platform (103). When the lifting device (106) is in the retracted state, the support surface (109) is lower than the upper surface of the calibration platform (103).

10. A testing and calibration system for electric scales according to claim 7, characterized in that, The extension direction of the conveyor belt mechanism (301) is perpendicular to the length direction of the test line (1), and the extension direction of the product support edge (303) is parallel to the length direction of the test line (1).

11. A testing and calibration system for electric scales according to claim 8, characterized in that, It also includes a main control cabinet (10), and a sub-controller (11) is provided on the first-floor self-propelled vehicle (6). The sub-controller (11) is electrically connected to the main control cabinet (10). The anti-sway electric cylinder (201), the electric control clamp (202), the conveyor belt mechanism (301) and the vertical electric cylinder (302) are all electrically connected to the sub-controller (11).

12. A testing and calibration system for electric scales according to claim 11, characterized in that, The first-layer self-propelled vehicle (6), the second-layer self-propelled vehicle (7), the front-mounted three-layer self-propelled vehicle (8), and the rear-mounted three-layer self-propelled vehicle (9) all include a frame and a vehicle drive mechanism mounted on the frame. Several of the vehicle drive mechanisms are electrically connected to the sub-controller (11).

13. A testing and calibration system for electric scales according to claim 11, characterized in that, Each of the first-layer self-propelled vehicle (6), the second-layer self-propelled vehicle (7), the front-mounted third-layer self-propelled vehicle (8), and the rear-mounted third-layer self-propelled vehicle (9) is equipped with a laser radar (12), which is electrically connected to the sub-controller (11).

14. A testing and calibration system for electric scales according to claim 11, characterized in that, The anti-sway electric cylinder (201) has a vision system (204) fixed to its outer side by a bracket (203), and the vision system (204) is electrically connected to the sub-controller (11).

15. A testing and calibration system for electric scales according to claim 12, characterized in that, The two-story self-propelled vehicle (7) is equipped with a maintenance hoist (13) mounted on the outside of its frame.

Images