A standard weight for calibration

Abstract

This utility model relates to a standard weight for calibration, comprising a weight body extending in the left-right direction and in the front-back direction. Mounting grooves are provided on the front and back sides of the weight body. The standard weight also includes a counterweight structure for placement in the corresponding mounting groove. The counterweight structure includes a grid plate with multiple counterweight placement grid holes of at least two sizes to accommodate different sized counterweights. The counterweight structure also includes a grid plate positioning device, comprising an upper top plate, a lower pressure member, and a pressing spring disposed between the upper top plate and the lower pressure member. The bottom of the lower pressure member has a pressing structure for pressing against the upper end of the grid plate. This utility model solves the technical problem in the prior art where the counterweight may shift and change the center of gravity of the weight during lifting and moving.

Description

Technical Field

[0001] This utility model relates to the field of metrology and calibration, and in particular to a standard weight for calibration. Background Technology

[0002] Standard weights provide a standardized mass and are therefore used in many calibration fields, such as the calibration of container overload detection devices. Our company has applied for an invention patent with application number 2025106900083 and titled "Calibration Method for Container Overload Detection Devices," which discloses a calibration method comprising the following steps:

[0003] S10. Adjust the distribution of weights at the bottom of the calibration box;

[0004] Multiple positioning structure groups are evenly distributed along the length direction on the rectangular base plate of the calibration box. Each positioning structure group includes multiple positioning structures evenly distributed in the width direction. A coordinate origin is set on the rectangular base plate, and the coordinate values ​​of each positioning structure relative to the coordinate origin are known.

[0005] Each weight can be detachably connected to the positioning structure, which can fix the weight so that the center of gravity of the weight coincides with the center of the corresponding positioning structure.

[0006] The positioning structure includes an unloaded positioning structure without weights and a loaded positioning structure with weights, wherein the number and position of the unloaded positioning structures are selected.

[0007] S20. Connect the spreader of the container overload detection device to the calibration box and lift the calibration box.

[0008] S30. Calculate the off-center load based on the distribution of each weight, and compare the calculated off-center load with the off-center load detected by the container overload detection device.

[0009] In this method, the off-center load of the weight is calculated. Therefore, to ensure the accuracy of the calculation, the center of gravity of the weight must remain constant, essentially coinciding with the geometric center of gravity of the weight. Traditional standard weights are usually cast, with a counterweight placement slot on the side. For example, to make a standard weight of 1000kg, the weight of the cast weight base will definitely be less than 1000kg, say 950kg. Then, a 50kg counterweight is added in the counterweight placement slot, thus achieving the production of a 1000kg standard weight. In existing technology, the counterweight is simply placed in the counterweight placement slot, and the standard weight needs to be lifted to the positioning structure using lifting equipment. During the entire lifting process, the counterweight may move relative to the weight, causing a change in the center of gravity of the weight, thereby affecting the final calibration accuracy. Utility Model Content

[0010] The purpose of this invention is to provide a standard weight for calibration, which solves the technical problem in the prior art that the counterweight may move and change the center of gravity of the weight during the lifting and moving process.

[0011] The technical solution for the calibration standard weights in this utility model is as follows:

[0012] A standard weight for calibration includes a weight body extending in the left-right direction and in the front-back direction. Mounting grooves are provided on the front and back sides of the weight body. The standard weight also includes a counterweight structure for placement in the corresponding mounting groove. The counterweight structure includes a grid plate with multiple counterweight placement grid holes. The counterweight placement grid holes have at least two specifications to match different sized counterweights. The counterweight structure also includes a grid plate positioning device, which includes an upper top plate, a lower pressure member, and a pressure spring disposed between the upper top plate and the lower pressure member. The bottom of the lower pressure member has a pressure structure for pressing down on the upper end of the grid plate.

[0013] Furthermore, the grid plate includes a front side plate, a rear side plate, and a left side plate and a right side plate fixed to the left and right ends of the front and rear side plates. The grid plate also includes multiple transverse partitions spaced apart in the left-right direction. The front and rear ends of the transverse partitions have transverse partition slots for engaging with the front and rear side plates. The grid plate also includes longitudinal partitions extending in the left-right direction. The bottom of the longitudinal partitions is provided with multiple longitudinal plate slots for engaging with the upper ends of the corresponding transverse partitions.

[0014] Furthermore, the left and right positions of the horizontal partitions are adjustable, and the front and back positions of the vertical partitions are adjustable.

[0015] Furthermore, there is one longitudinal partition, and the counterweight placement grid hole is formed by adjacent longitudinal partitions, transverse partitions and corresponding grid plate sidewalls.

[0016] Furthermore, the top-pressing structure includes a top-pressing strip extending in the left-right direction, a top-pressing strip groove at the bottom of the top-pressing strip that is adapted to the longitudinal partition, a lower top plate at the upper end of the top-pressing strip that corresponds to the upper top plate, and a top-pressing spring disposed between the upper top plate and the lower top plate.

[0017] Furthermore, there are multiple compression springs, which are spaced apart in the left-right direction.

[0018] The beneficial effects of this technical solution are as follows: In this utility model, the required counterweight is placed in the corresponding size of the grid holes, and the position of the counterweight is positioned by the grid plate. The grid plate is placed in the corresponding mounting groove, and the grid plate positioning device is placed between the grid plate and the top of the mounting groove. Under the action of the top pressure spring, the upper top plate of the grid plate positioning device presses against the top of the mounting groove, and the lower pressure member of the grid plate positioning device presses against the upper end of the grid plate, thereby positioning the grid plate in the mounting groove. In this way, during the hoisting of the standard weight, the counterweight can be prevented from moving back and forth and changing the center of gravity of the standard weight. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 Top view;

[0021] Figure 3 yes Figure 1 Sectional view of item AA;

[0022] Figure 4 yes Figure 1 Schematic diagram of the central counterweight structure;

[0023] Figure 5 yes Figure 4 Top view of the grid panel;

[0024] Figure 6 yes Figure 4 Side view;

[0025] Figure 7 yes Figure 4 Schematic diagram of the longitudinal partition;

[0026] Figure 8 yes Figure 4 Schematic diagram of the transverse partition in the middle;

[0027] In the diagram: 1. Weight body; 2. Counterweight structure; 3. Lug; 4. Mounting groove; 5. Positioning protrusion; 6. Positioning groove; 7. Hanging rod; 8. Grid plate; 9. Horizontal partition; 10. Vertical partition; 11. Front side plate of the grid plate; 12. Left side plate of the grid plate; 13. Vertical plate slot; 14. Top pressure strip; 15. Lower top plate; 16. Upper top plate; 17. Top pressure spring; 18. Right side plate of the grid plate; 19. Grid hole; 20. Horizontal plate slot. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0032] A specific embodiment of the calibration standard weight of this utility model is as follows: Figures 1-8 As shown:

[0033] The weight body 1 extends in length along the left-right direction and in width along the front-back direction. Mounting grooves 4 are provided on the front and back sides of the weight body 1. Lugs 3 are provided at the left and right ends of the weight body. The lugs 3 facilitate cooperation with a forklift to lift the entire standard weight.

[0034] The bottom of the weight body is provided with a positioning protrusion 5, and the top of the weight body 1 is provided with a positioning groove 6. When in use, the positioning protrusion on the upper part of the weight body and the positioning groove on the top of the lower part of the weight body are positioned and engaged, so that multiple standard weights can be stacked and used, thereby increasing the standard weight of the entire calibration unit.

[0035] The top center of the weight body is also provided with a top groove, in which a hanging rod 7 is provided. The hanging rod can be used with other lifting tools to lift the standard weight to the designated location.

[0036] The standard weight also includes a counterweight structure for being installed in the corresponding mounting slot. In this embodiment, the counterweight structure includes a grid plate 8, which includes a front side plate 11, a rear side plate, and a left side plate 12 and a right side plate 18 fixed to the left and right ends of the front and rear side plates. The grid plate also includes a plurality of transverse partitions 9 spaced apart in the left and right direction. The front and rear ends of the transverse partitions 9 have transverse partition slots 20 for being snapped into the front and rear side plates. The grid plate also includes a longitudinal partition 10 extending in the left and right direction. The bottom of the longitudinal partition is provided with a plurality of longitudinal plate slots 13 for the upper ends of the corresponding transverse partitions to be snapped into.

[0037] The horizontal partition 9 is adjustable in the left and right positions, and the vertical partition 10 is adjustable in the front and back positions. There is one vertical partition. The adjacent vertical partition, horizontal partition, and corresponding grid plate sidewalls form a counterweight placement grid hole 19. That is to say, in this embodiment, the size of the counterweight placement grid hole can be adjusted. In use, according to the missing weight of the weight body, a counterweight of appropriate size is selected, and the size of the counterweight placement grid hole is adjusted so that the size of the counterweight matches the size of the counterweight placement grid hole. In this way, the horizontal movement of the counterweight can be restricted by the counterweight placement grid hole.

[0038] The counterweight structure also includes a grid plate positioning device, which includes an upper top plate 16, a lower pressure member, and a top pressure spring 17 disposed between the upper top plate 16 and the lower pressure member. The bottom of the lower pressure member has a top pressure structure for pressing the upper end of the grid plate.

[0039] In this embodiment, the top pressing structure includes a top pressing strip 14 extending in the left-right direction. The bottom of the top pressing strip 14 has a top pressing strip groove adapted to the longitudinal partition 10. The upper end of the top pressing strip 14 has a lower top plate 15 corresponding to the upper top plate 16. The top pressing spring is disposed between the upper top plate 16 and the lower top plate 15.

[0040] like Figure 3 As shown, in this embodiment, the weight of the grid plate and the grid plate positioning device is the standard weight. Assuming the required weight of the standard weight is 1000kg, the weight of the weight body is 920kg, and the weight of the grid plate and the grid plate positioning device is 10kg, an additional 60kg of counterweight is needed. 30kg of counterweight is arranged symmetrically in each mounting slot to keep the center of gravity of the weight consistent with the geometric center.

[0041] In use, first place the grid plate 8 into the corresponding mounting slot, then place the corresponding weight of counterweight into the corresponding grid hole. Next, the operator compresses the gap between the upper and lower top plates, inserts the grid plate positioning device between the grid plate and the upper wall of the mounting slot, and releases the top pressure strip, allowing the top pressure strip slot to engage with the longitudinal partition. Then, the upper top plate is released, and under the action of the top pressure spring, the upper top plate presses firmly against the upper wall of the mounting slot. This fixes the grid plate and positions the counterweight, preventing changes in the counterweight position during standard weight movement from affecting the center of gravity of the standard weight and reducing the impact of center of gravity changes on the final calibration accuracy.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A standard weight for calibration, comprising a weight body extending in the left-right direction and in the front-back direction, wherein mounting grooves are provided on the front and back sides of the weight body, and the standard weight further comprises a counterweight structure for being disposed in the corresponding mounting groove, characterized in that: The counterweight structure includes a grid plate with multiple counterweight placement grid holes. The counterweight placement grid holes have at least two specifications to match different sizes of counterweights. The counterweight structure also includes a grid plate positioning device, which includes an upper top plate, a lower pressure member, and a top pressure spring disposed between the upper top plate and the lower pressure member. The bottom of the lower pressure member has a top pressure structure for pressing the upper end of the grid plate.

2. The calibration standard weight according to claim 1, characterized in that: The grid plate includes a front grid plate, a rear grid plate, and a left grid plate and a right grid plate fixed to the left and right ends of the front and rear grid plates. The grid plate also includes multiple transverse partitions spaced apart in the left-right direction. The front and rear ends of the transverse partitions have transverse partition slots for engaging with the front and rear grid plates. The grid plate also includes longitudinal partitions extending in the left-right direction. The bottom of the longitudinal partitions has multiple longitudinal plate slots for engaging with the upper ends of the corresponding transverse partitions.

3. The calibration standard weight according to claim 2, characterized in that: The horizontal partitions are adjustable to the left and right, and the vertical partitions are adjustable to the front and back.

4. The calibration standard weight according to claim 3, characterized in that: There is one longitudinal partition, and the counterweight placement grid hole is formed by adjacent longitudinal partitions, transverse partitions and corresponding grid plate sidewalls.

5. The calibration standard weight according to claim 4, characterized in that: The top-pressing structure includes a top-pressing strip extending in the left-right direction. The bottom of the top-pressing strip has a top-pressing strip groove that is adapted to the longitudinal partition. The upper end of the top-pressing strip has a lower top plate that is correspondingly set to the upper top plate. The top-pressing spring is set between the upper top plate and the lower top plate.

6. The calibration standard weight according to claim 5, characterized in that: There are multiple compression springs, which are spaced apart in the left-right direction.

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