A weight calibration auxiliary device for external inspection work

Abstract

This utility model discloses an auxiliary device for weight calibration in external inspection work, belonging to the field of weight calibration technology. It includes a crossbeam and support legs at both ends of the crossbeam. The support legs are hinged to the crossbeam and can rotate along the hinge to be parallel to the crossbeam for storage or perpendicular to it to support the crossbeam. A sliding mechanism is provided on the crossbeam, and a lifting device is mounted on the sliding mechanism. The lifting device is equipped with a hook. It also includes a quick-lock mechanism, which includes a slider and a quick-lock spring. The slider is slidably connected to the crossbeam. One end of the slider is connected to the crossbeam with the quick-lock spring, and the other end forms a quick-lock groove with the crossbeam. A limit rod is provided on each support leg. When the support leg rotates to be perpendicular to the crossbeam, the limit rod pushes open the slider and engages with the quick-lock groove. This utility model facilitates adjustment and quick unfolding / folding by technicians, improving weight calibration efficiency and reducing the workload of technicians.

Description

Technical Field

[0001] This utility model relates to an auxiliary device for weight verification, and more particularly to an auxiliary device for weight verification used in external inspection work, belonging to the field of weight verification technology. Background Technology

[0002] Weights are tools used to measure the weight of objects, and their accuracy is a crucial aspect of ensuring quality control. Over time, the weight of weights may change, affecting their accuracy. Regular calibration of weights ensures their quality and weight accuracy, thereby guaranteeing reliability in various measurement and inspection processes. Weight calibration is performed by legally authorized metrological testing institutions, whose legal authorization and technical qualifications ensure the authority of measurement value transmission. Calibration is a mandatory activity based on the "Metrology Law," used to verify whether the weight's error is within the legally permissible tolerance range. Weights that pass calibration receive a "Calibration Certificate" and can be used in legal metrological fields such as trade settlement; those that fail calibration must be discontinued or downgraded.

[0003] Metrology and testing institutions conduct verification work on enterprise weights in accordance with the "Metrology Law" and related regulations. Generally, technicians can bring standard weights to the enterprise's site or request the enterprise to submit them for verification. In their daily external inspection work, metrology and testing institutions frequently encounter the testing of non-automatic weighing instruments, health scales, and large-mass weights. These tested items are located in various locations in factories, hospitals, and research institutions, and require periodic verification every year. During the on-site verification service provided by metrology institute technicians, staff need to place the weights on the scale for linearity testing, repeatability testing, and off-center load testing, etc. (Linearity testing refers to, for example, sequentially increasing the weight by 25KG, 50KG, 75KG, 100KG, 125KG, 150KG, and then decreasing it by 150KG, 125KG, 100KG, 75KG, 50KG, 25KG. Repeatability testing refers to performing multiple tests on the same mass value at a central location. Off-center load testing involves dividing the scale pan evenly into four parts and verifying each part sequentially.) Some weights are quite heavy, such as 20KG or 25KG. The manual handling of these weights during the verification process is labor-intensive, inefficient, time-consuming, and puts a heavy burden on the staff.

[0004] Existing technologies include devices for assisting in the handling of weights, such as the weight-assisting handling device disclosed in Chinese Utility Model Patent Application No. CN202122981101.X. This device can replace manual handling of weights during scale and weight verification, reducing manpower burden and improving work efficiency. However, the folding and unfolding process of this device is relatively cumbersome, affecting the efficiency of verification work, and it is not convenient to adjust for operators of different heights. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an auxiliary device for weight verification in external inspection work.

[0006] The technical solution adopted in this utility model is as follows: An auxiliary device for weight calibration in external inspection work is designed, including a crossbeam and support legs at both ends of the crossbeam. The support legs are hinged to the crossbeam and can rotate along the hinge to be parallel to the crossbeam for storage or perpendicular to it to support the crossbeam. The support legs are fixed after being rotated to be perpendicular to the crossbeam, thereby supporting the crossbeam. A sliding mechanism is provided on the crossbeam, and a lifting device is mounted on the sliding mechanism. The lifting device is equipped with a hook for grasping the weights. It also includes a quick-lock mechanism, which comprises a slider and a quick-lock spring. The slider is slidably connected to the crossbeam, meaning it is mounted on the crossbeam and can slide back and forth. One end of the slider is connected to the crossbeam with the quick-lock spring (the slider's movement compresses or stretches the spring, which, after deformation, has the ability to push the slider back to its original position). The other end of the slider has a quick-lock groove formed between it and the crossbeam. A limit rod is provided on the support leg. When the support leg rotates to be perpendicular to the crossbeam, the limit rod pushes open the slider and engages in the quick-lock groove. Then, the slider resets under the action of the quick-lock spring and limits the limit rod, thereby fixing the support leg. When folding is required, the slider is manually pulled to make room, and then the support leg can be folded. This structure allows for the rapid unfolding, fixing, and folding of the entire bracket, improving work efficiency.

[0007] Furthermore, the slider has an L-shaped notch, which forms a quick-lock groove with the crossbeam. The end of the slider at the L-shaped notch has a ramp or rounded corner, and the limiting rod opens the slider through the ramp or rounded corner. This structure allows the limiting rod to open the slider and engage with the quick-lock groove during the rotation of the support leg to be perpendicular to the crossbeam.

[0008] Furthermore, an ear plate is provided on the crossbeam on one side of the slider, and a guide hole is provided on the ear plate. A guide rod is provided on the slider, and the guide rod passes through the guide hole. A limit cap is provided at the end of the guide rod that passes through the ear plate. The quick-lock spring is provided on the guide rod between the slider and the ear plate. Through the above structure, the quick-lock spring is directionally compressed under the action of the slider, and directionally released after the external force on the slider disappears, thereby accurately and efficiently resetting the slider.

[0009] Furthermore, each end of the crossbeam is provided with a slide rail, and the slider is locked in the slide rail; the slide rail is a strip-shaped opening that passes through the end of the crossbeam, and the front and rear sides of the slider are respectively provided with slots and locked on the crossbeam at the strip-shaped opening, forming a reliable connection and preventing the slider from moving up and down after installation. The limiting cap is a nut that is threadedly connected to the guide rod. Combined with the strip-shaped opening structure that passes through the end of the crossbeam, the slider can be easily disassembled and replaced.

[0010] Furthermore, the slider is provided with a paddle, which is located on the lower side of the slider near the end of the quick-lock spring. When it is necessary to fold the support foot, the slider is opened by the paddle, the limit rod is released, and the support foot is folded.

[0011] Furthermore, both the crossbeam and the support legs are length-adjustable structures, and both employ a tube-insertion structure combined with bolt locking to achieve length adjustment. The adjustable length of the crossbeam facilitates use in different scenarios, such as spacious outdoor environments or narrow indoor spaces. The adjustable length of the support legs allows for height adjustment, making it convenient for technicians of different heights and builds, or for use in height-restricted indoor environments. In addition, the adjustable length of both the crossbeam and the support legs allows for easy folding and storage of the entire device. Folding the support legs parallel to the crossbeam significantly reduces the space required, and then adjusting the crossbeam and support legs to their shortest possible positions further reduces the space required, facilitating storage and transport.

[0012] Furthermore, the support foot includes an upper sleeve, a main rod, a lower sleeve, and a support rod. The upper sleeve is hinged to the crossbeam, and a limiting rod is disposed on the upper sleeve. The upper and lower sleeves are connected by the main rod. Support rods are hinged to the lower sleeves located on both sides of the main rod. The length of the support rods is adjustable and lockable. In use, the two support rods are opened to stably support the entire device. The adjustable length of the support rods also allows the entire device to be used in uneven environments. The stability of the entire device is ensured by adjusting the length of each support rod. Rotation limiting elements are also provided on both sides of the lower sleeve to limit the rotation opening angle of the support rods.

[0013] Furthermore, the upper sleeve is provided with a clamping opening, and the upper sleeve located at the clamping opening is also provided with an outer hinge hole and an inner hinge hole. Both ends of the crossbeam are respectively provided with an outer through hole and an inner through hole. The outer hinge hole of the upper sleeve of the support foot at one end of the crossbeam is hinged to the outer through hole on the corresponding end of the crossbeam through a pin shaft. The inner hinge hole of the upper sleeve of the support foot at the other end is hinged to the inner through hole on the corresponding end of the crossbeam through a pin shaft. The hinge positions of the support feet at both ends of the crossbeam are different from those of the crossbeam, so that when it is folded to be parallel to the crossbeam, the two support feet are at different heights to form an upper and lower stacked structure, which is convenient for storage. The limiting rod is provided on the upper sleeve at the clamping opening.

[0014] Furthermore, the upper sleeve is equipped with a handle for easy handling of the folded device, and the lower end of the support rod is equipped with a wheel with brakes, which facilitates the quick and easy transfer of the unfolded device.

[0015] Furthermore, the support rod and the crossbeam adopt the same length adjustable structure, which includes an outer tube and an inner tube. The outer tube is provided with a locking hole, and the inner tube is provided with multiple adjustment holes arranged in an array along its length direction. The two are locked by bolts. The length is adjustable by aligning the locking hole with different adjustment holes and then locking with bolts.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This application has a simple structure. With the quick-lock mechanism, the support legs and the crossbeam can be quickly folded and unfolded for fixation. After unfolding, its width and height can be adjusted to suit different usage needs and operators. The folded bracket can also be further retracted, greatly reducing its volume and facilitating transportation and handling. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the unfolded form of this utility model.

[0020] Figure 2 This is a schematic cross-sectional view of the present invention.

[0021] Figure 3 for Figure 2 Enlarged view of part A.

[0022] Figure 4 This is a schematic diagram of the assembly of the crossbeam and sliding mechanism of this utility model.

[0023] Figure 5 This is a schematic diagram of the support foot of this utility model.

[0024] Figure 6 This is a schematic diagram of the quick-lock mechanism of this utility model.

[0025] Figure 7 This is a schematic diagram of the sliding mechanism of this utility model.

[0026] Figure 8 This is a schematic diagram of the folded state of this utility model.

[0027] In the diagram: 1. Crossbeam; 2. Support leg; 3. Sliding mechanism; 4. Quick-lock mechanism; 5. Slider; 6. Quick-lock spring; 7. Quick-lock groove; 8. Limiting rod; 9. L-shaped notch; 10. Ear plate; 11. Guide rod; 12. Limiting cap; 13. Slide rail; 14. Slot; 15. Paddle; 16. Upper sleeve; 17. Main rod; 18. Lower sleeve; 19. Support rod; 20. Rotation limiting component; 21. Clamping opening; 22. External hinge hole; 23. Internal hinge hole; 24. External through hole; 25. Internal through hole; 26. Handle; 27. Traveling wheel. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0030] Example 1

[0031] like Figure 1-3 As shown, an auxiliary device for weight calibration in external inspection work includes a crossbeam 1 and support legs 2 disposed at both ends of the crossbeam 1. The support legs 2 are hinged to the crossbeam 1 and can rotate along the hinge to be parallel to the crossbeam 1 for storage or perpendicular to the crossbeam 1 for support. A sliding mechanism 3 is provided on the crossbeam 1, such as... Figure 7As shown, the sliding mechanism 3 is equipped with a lifting device (not shown in the attached drawings; conventional existing technology can be used, such as the lifting device in Chinese Utility Model Patent Application No. CN202122981101.X). The lifting device is equipped with a hook for grabbing weights (not shown in the attached drawings; conventional lock-type weight hangers and cylindrical weight hangers are sufficient). This embodiment also includes a quick-lock mechanism 4, which includes a slider 5 and a quick-lock spring 6. The slider 5 is slidably connected to the crossbeam 1. The quick-lock spring 6 is provided between one end of the slider 5 and the crossbeam 1, and a quick-lock groove 7 is formed between the other end of the slider 5 and the crossbeam 1. For example, the slider 5 is provided with an L-shaped notch 9, and the quick-lock groove 7 is formed between the L-shaped notch 9 and the crossbeam 1. The end of the slider 5 at the L-shaped notch 9 is provided with a ramp or rounded corner, and the limiting rod 8 pushes open the slider 5 through the ramp or rounded corner. The support leg 2 is provided with a limiting rod 8. When the support leg 2 rotates to be perpendicular to the crossbeam 1, the limiting rod 8 pushes open the slider 5 and gets into the quick lock groove 7. Then the slider 5 is reset under the action of the quick lock spring 6 and limits the limiting rod 8.

[0032] Example 2

[0033] This embodiment is a further refinement of the quick-lock mechanism 4 based on Embodiment 1. For example... Figure 6 As shown, in this embodiment, the quick-lock mechanism 4 further includes an ear plate 10. The ear plate 10 is provided on the crossbeam 1 on one side of the slider 5. The ear plate 10 is provided with a guide hole. The slider 5 is provided with a guide rod 11. The guide rod 11 is inserted into the guide hole and can slide. A limit cap 12 is provided at one end of the guide rod 11 that passes through the ear plate 10 to prevent the guide rod 11 from disengaging from the guide hole. The quick-lock spring 6 is provided on the guide rod 11 between the slider 5 and the ear plate 10.

[0034] More specifically, a slide rail 13 is provided at the end of the crossbeam 1, and the slider 5 is locked in the slide rail 13; the slide rail 13 is a strip-shaped opening that passes through the end of the crossbeam 1, and the slider 5 can be locked in along the strip-shaped opening when installed. The slider 5 is provided with a slot 14 on the front and rear sides and is locked on the crossbeam 1 at the strip-shaped opening. The limiting cap 12 is a nut that is threadedly connected to the guide rod 11 (not shown in the figure, the figure shows a fixed limiting cap 12 structure, which can be optimized to a detachable nut structure).

[0035] In this embodiment, the slider 5 is provided with a paddle 15. The paddle 15 is located on the lower side of the slider 5 near the end of the quick-lock spring 6, and can also be located on the front and rear sides of the slider 5. The paddle 15 can be a small rectangular plate, or a protruding ridge on the slider 5, etc.

[0036] Example 3

[0037] This embodiment is based on embodiment 2, with further optimization of the support leg 2, the crossbeam 1, and the connection between the two. For example... Figure 4-5 As shown, in this embodiment, both the crossbeam 1 and the support leg 2 are length-adjustable structures, and both use a tube structure combined with bolt locking to achieve length adjustment. For example, the support leg 2 includes an upper sleeve 16, a main rod 17, a lower sleeve 18, and a support rod 19. The upper sleeve 16 is hinged to the crossbeam 1, and the limiting rod 8 is disposed on the upper sleeve 16. The upper sleeve 16 and the lower sleeve 18 are connected by the main rod 17. Support rods 19 are hinged to the lower sleeves 18 located on both sides of the main rod 17, and rotation limiting components 20 (usually bolt assemblies) are also provided on both sides of the lower sleeve 18. More specifically, both the upper sleeve 16 and the lower sleeve 18 are made of two thin plates arranged opposite each other; the upper sleeve 16 is a right-angled trapezoidal plate, and the lower sleeve 18 is an isosceles trapezoidal plate. The upper clamping sleeve 16 can also be made into a C-shaped part by bending a plate, and a clamping opening 21 is opened at the upper end. The lower clamping plate can also be made by welding two isosceles trapezoidal plates and two rectangular plates together (in this case, the rotation limiter 20 can be omitted).

[0038] More specifically, the upper sleeve 16 is provided with a clamping opening 21, and the upper sleeve 16 located at the clamping opening 21 is also provided with an outer hinge hole 22 and an inner hinge hole 23. Both ends of the crossbeam 1 are respectively provided with an outer through hole 24 and an inner through hole 25. The outer hinge hole 22 of the upper sleeve 16 of the support leg 2 at one end of the crossbeam 1 is hinged to the outer through hole 24 on the corresponding end of the crossbeam 1 through a pin. The inner hinge hole 23 of the upper sleeve 16 of the support leg 2 at the other end is hinged to the inner through hole 25 on the corresponding end of the crossbeam 1 through a pin. The limiting rod 8 is provided on the upper sleeve 16 at the clamping opening 21.

[0039] Example 4

[0040] This embodiment is a further optimization of the support foot 2 and the crossbeam 1 based on embodiment 3. In this embodiment, the upper sleeve 16 is provided with a handle 26, and a roller (not shown in the figure) is usually provided at one end of the crossbeam 1 to facilitate single-person operation and transfer of the entire device. The roller axle is coaxial with the hinge axis of the support foot 2 and the crossbeam 1, and the lower end of the support rod 19 is provided with a traveling wheel 27 with brake.

[0041] In this embodiment, the support rod 19 and the crossbeam 1 adopt the same length adjustable structure (insertion-type telescopic adjustment structure). The length adjustable structure includes an outer tube and an inner tube. The outer tube is provided with a locking hole, and the inner tube is provided with a plurality of adjustment holes arranged in an array along its length direction. The two are locked by passing through bolts (the bolts are not shown in the attached drawings), or quick-release pins can be used for locking.

[0042] When using this utility model, move it to the target position, then rotate the support leg 2 to make it unfold in a straight line with the crossbeam 1, then lift the crossbeam 1, continue to rotate the support leg 2 until it is perpendicular to the crossbeam 1, and lock the support leg 2 by cooperating with the limit rod 8 and the quick-locking mechanism 4. Then, load the lifting mechanism, hook, etc., to perform linearity testing, repeatability testing, and off-center load testing, etc. After completion, operate the quick-locking mechanism 4 to retract, and flip the support leg 2 upwards until it is parallel to the crossbeam 1. Figure 8 As shown. Sometimes it is necessary to adjust the length of the crossbeam 1 and the height of the support leg 2. After adjustment, when retracting the bracket, return it to its shortest or normal operating length.

[0043] Furthermore, in the description of this utility model, unless otherwise stated, the terms "multiple," "multiple roots," and "multiple groups" mean two or more. It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0044] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A weight calibration auxiliary device for external inspection work, comprising a crossbeam (1) and support legs (2) disposed at both ends of the crossbeam (1), wherein the support legs (2) are hinged to the crossbeam (1) and can rotate along the hinge to be parallel to the crossbeam (1) for storage or perpendicular to the crossbeam (1) to support the crossbeam (1), wherein a sliding mechanism (3) is provided on the crossbeam (1), and a lifting device is mounted on the sliding mechanism (3), wherein a hook for grabbing weights is provided on the lifting device, characterized in that: It also includes a quick-lock mechanism (4), which includes a slider (5) and a quick-lock spring (6). The slider (5) is slidably connected to the crossbeam (1). The quick-lock spring (6) is provided between one end of the slider (5) and the crossbeam (1), and a quick-lock groove (7) is formed between the other end of the slider (5) and the crossbeam (1). A limit rod (8) is provided on the support foot (2). When the support foot (2) rotates to be perpendicular to the crossbeam (1), the limit rod (8) pushes open the slider (5) and gets stuck in the quick-lock groove (7). Then the slider (5) is reset under the action of the quick-lock spring (6) and limits the limit rod (8).

2. The auxiliary device for weight calibration in external inspection work according to claim 1, characterized in that: The slider (5) is provided with an L-shaped notch (9), and a quick-lock groove (7) is formed between the L-shaped notch (9) and the crossbeam (1). The end of the slider (5) at the L-shaped notch (9) is provided with a ramp or rounded corner, and the limiting rod (8) pushes open the slider (5) through the ramp or rounded corner.

3. The auxiliary device for weight calibration in external inspection work according to claim 2, characterized in that: An ear plate (10) is provided on the crossbeam (1) on one side of the slider (5). A guide hole is provided on the ear plate (10). A guide rod (11) is provided on the slider (5). The guide rod (11) is inserted into the guide hole. A limit cap (12) is provided at one end of the guide rod (11) that passes through the ear plate (10). The quick-lock spring (6) is provided on the guide rod (11) between the slider (5) and the ear plate (10).

4. The auxiliary device for weight calibration in external inspection work according to claim 3, characterized in that: The end of the crossbeam (1) is provided with a slide (13), and the slider (5) is locked in the slide (13); the slide (13) is a strip-shaped opening that passes through the end of the crossbeam (1), and the slider (5) is provided with a slot (14) on the front and rear sides and is locked on the crossbeam (1) at the strip-shaped opening. The limiting cap (12) is a nut that is threadedly connected to the guide rod (11).

5. The auxiliary device for weight calibration in external inspection work according to claim 4, characterized in that: The slider (5) is provided with a paddle (15), which is located on the lower side of the slider (5) near the quick-lock spring (6).

6. The auxiliary device for weight calibration for external inspection work according to any one of claims 1-5, characterized in that: Both the crossbeam (1) and the support leg (2) are length-adjustable structures, and both adopt a tube structure combined with bolt locking to achieve length adjustment.

7. The auxiliary device for weight calibration for external inspection work according to claim 6, characterized in that: The support foot (2) includes an upper sleeve (16), a main rod (17), a lower sleeve (18), and a support rod (19). The upper sleeve (16) is hinged to the crossbeam (1). The limiting rod (8) is set on the upper sleeve (16). The upper sleeve (16) and the lower sleeve (18) are connected by the main rod (17). The support rod (19) is hinged on the lower sleeve (18) located on both sides of the main rod (17). Rotation limiting members (20) are also provided on both sides of the lower sleeve (18).

8. The auxiliary device for weight calibration in external inspection work according to claim 7, characterized in that: The upper sleeve (16) is provided with a clamping port (21). The upper sleeve (16) located at the clamping port (21) is also provided with an outer hinge hole (22) and an inner hinge hole (23). Both ends of the crossbeam (1) are respectively provided with an outer through hole (24) and an inner through hole (25). The outer hinge hole (22) of the upper sleeve (16) of the support foot (2) at one end of the crossbeam (1) is hinged to the outer through hole (24) at the corresponding end of the crossbeam (1) by a pin. The inner hinge hole (23) of the upper sleeve (16) of the support foot (2) at the other end is hinged to the inner through hole (25) at the corresponding end of the crossbeam (1) by a pin. The limiting rod (8) is provided on the upper sleeve (16) at the clamping port (21).

9. The auxiliary device for weight calibration for external inspection work according to claim 8, characterized in that: The upper sleeve (16) is provided with a handle (26), and the lower end of the support rod (19) is provided with a traveling wheel (27) with brakes.

10. The auxiliary device for weight calibration in external inspection work according to claim 7, characterized in that: The support rod (19) and the crossbeam (1) adopt the same length adjustable structure. The length adjustable structure includes an outer tube and an inner tube. The outer tube is provided with a locking hole, and the inner tube is provided with multiple adjustment holes arranged in an array along its length direction. The two are locked by passing through bolts.

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