platform scale

Abstract

The present disclosure belongs to the technical field of weighing, and particularly relates to a platform scale. The present disclosure provides a platform scale which is used in cooperation with a scale pit and is arranged on a working surface. The platform scale comprises a base provided with a mounting groove, a weight sensor arranged in the mounting groove, and a loading platform arranged on the weight sensor. The base is suspended in the scale pit. The platform scale suspends the base in the scale pit, so that the gravity center of the platform scale is lowered. Even if a heavy object is placed on the loading platform without being placed at the center of the loading platform, the platform scale will not be tilted as a whole, and even will not be overturned. The stability of the platform scale during weighing is ensured. Since the platform scale is suspended, the unevenness of the working surface will not cause the platform scale to be placed unstably, and the measurement accuracy of the platform scale is affected. Therefore, the accuracy requirement of the bottom surface of the scale pit is not high, and the scale pit is easier to process.

Description

Technical Field

[0001] This disclosure belongs to the field of weighing technology, and specifically relates to a platform scale. Background Technology

[0002] Electronic platform scales use load cells to convert physical weight into electrical signals, which are then amplified and digitized to display the weighing value in digital form, providing high accuracy and stability.

[0003] When weighing heavy items, if the items are stacked high, have irregular shapes, or are placed far off-center, the center of gravity of the electronic platform scale will rise or shift. Alternatively, if the weighing area is enlarged to weigh larger items, the electronic platform scale is prone to tilting, affecting the accuracy of the weighing and even causing it to tip over. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a platform scale.

[0005] This disclosure provides a platform scale for use with a weighing pit, the weighing pit being formed on a working surface, the platform scale comprising: The base has a mounting groove, in which a weight sensor and a platform mounted on the weight sensor are disposed, and the base is suspended in the weighing pit.

[0006] In one embodiment of this disclosure, there is a preset vertical distance between the loading surface of the stage and the working surface, and the preset vertical distance is in the range of 0-6mm.

[0007] In one embodiment of this disclosure, the loading surface of the stage and the working surface are at the same height.

[0008] In one embodiment of this disclosure, the groove of the mounting slot is bent outward to form an overlapping portion, and a sinkhole is provided at the edge of the weighing pit. The sinkhole is configured to abut against the lower surface of the overlapping portion so that the upper surface of the overlapping portion is at the same height as the working surface, and the upper surface of the overlapping portion is at the same height as the loading surface of the platform.

[0009] In one embodiment of this disclosure, the base includes a main support portion disposed in the center, with extension portions extending outward from both sides of the main support portion, and the thickness of the main support portion being greater than the thickness of the extension portions; and / or, The platform includes a main loading section located in the middle, with extensions extending outward from both sides of the main loading section to form extensions, and the thickness of the main loading section is greater than the thickness of the extensions.

[0010] In one embodiment of this disclosure, the ratio of the thickness of the extended portion to the thickness of the main bearing portion is 1:3-1:5; and / or, The ratio of the thickness of the extension to the thickness of the main carrier is 1:3 to 1:5.

[0011] In one embodiment of this disclosure, the base includes: A support frame, which is formed by connecting longitudinal beams and transverse beams, and a support beam is provided at the bottom of the support frame; The bearing plate is fixedly mounted on the support beam, and the bearing plate is equipped with the weight sensor and the platform.

[0012] In one embodiment of this disclosure, the platform scale is further provided with an alarm device, which is configured to issue an alarm when the platform tilts beyond a preset safe tilt range after being loaded. In one embodiment of this disclosure, the alarm device includes: Alarm element; At least three proximity switches are evenly arranged in the mounting slot or on the platform and electrically connected to the alarm element. The proximity switches are configured to send an electrical signal to trigger the alarm element to sound an alarm after detecting that the edge of the platform deflection distance exceeds a preset safety distance when the platform is loaded.

[0013] In one embodiment of this disclosure, the mounting slot is a square slot, and a plurality of proximity switches are spaced annularly within the mounting slot; or, Multiple proximity switches are spaced in a ring around the lower edge of the stage.

[0014] One of the beneficial effects of this disclosure is that the platform scale, by suspending the base in the weighing pit and setting a weight sensor in the mounting groove of the base and a platform on the weight sensor, lowers the center of gravity of the platform scale, making the weighing of items more stable. Even when weighing heavy items, if they are not placed in the center of the platform, the platform scale will not tilt or even tip over, ensuring the stability of the platform scale during weighing. Furthermore, because the platform scale is suspended, it avoids uneven working surfaces that could cause the platform scale to be placed unstable and affect the measurement accuracy of the platform scale. Therefore, the accuracy requirements for the bottom surface of the weighing pit are not high, and the manufacturing of the weighing pit is simpler.

[0015] Thus, the platform scale disclosed herein has a simple structure, better stability, low manufacturing difficulty and low cost, and is convenient for weighing items. Attached Figure Description

[0016] Embodiments of this disclosure are illustrated in conjunction with the accompanying drawings, which are included and form part of this specification, and together with their description serve to explain the principles of this disclosure.

[0017] Figure 1 This is a cross-sectional structural schematic diagram of a platform scale provided in an embodiment of the present disclosure; Figure 2 This is a three-dimensional structural diagram of the support frame and bearing plate of a platform scale provided in an embodiment of the present disclosure.

[0018] Figures 1 to 2 The correspondence between the component names and the reference numerals in the figures is as follows: 1. Base: 11. Overlapping part, 12. Main load-bearing part, 13. Extension part, 14. Support frame, 15. Load-bearing plate; 2 weight sensors; 3. Platform: 31. Main loading section, 32. Extension section; 4. Proximity switch. Detailed Implementation

[0019] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0020] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0021] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0022] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0024] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0025] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0026] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0027] It should be noted that, in describing the structure of the platform scale, the directional terms used in this article are based on the alignment of the platform scale with the weighing pit. Specifically, the side of the platform scale located on the load-bearing surface is designated as "upper," the side of the platform scale opposite the load-bearing surface is designated as "lower," the side of the platform scale furthest from the weighing pit is designated as "inner," and the side of the platform scale closest to the weighing pit is designated as "outer." The working surface of this disclosure can be a horizontal ground or a hard, flat plane.

[0028] Electronic platform scales use load cells to convert physical weight into electrical signals, which are then amplified and digitized to display the weighing value in digital form, providing high accuracy and stability.

[0029] When weighing heavy items, if the items are stacked high, have irregular shapes, or are placed far off-center, the center of gravity of the electronic platform scale will rise or shift. Alternatively, if the weighing area is enlarged to weigh larger items, the electronic platform scale is prone to tilting, affecting the accuracy of the weighing and even causing it to tip over.

[0030] To this end, the present disclosure provides a platform scale for use with a weighing pit, which is formed on a working surface. The platform scale of the present disclosure includes a base with a mounting groove, in which a weight sensor and a platform mounted on the weight sensor are disposed. Furthermore, the base is suspended in the weighing pit.

[0031] The platform scale disclosed herein lowers the center of gravity of the scale by suspending the base in the weighing pit and installing a weight sensor in the mounting groove of the base and a platform on the weight sensor. This makes weighing items more stable. Even when weighing heavy items, if the items are not placed in the center of the platform, the scale will not tilt or tip over, ensuring its stability during weighing. Furthermore, because the scale is suspended, uneven working surfaces prevent the scale from being placed unstable and affecting its measurement accuracy. Therefore, the accuracy requirements for the bottom surface of the weighing pit are not high, and the manufacturing process of the weighing pit is simpler.

[0032] Thus, the platform scale disclosed herein has a simple structure, better stability, low manufacturing difficulty and low cost, and is convenient for weighing items.

[0033] For ease of understanding, please refer to the following: Figures 1 to 2 The specific structure and working principle of the platform scale provided in this disclosure will be described in detail with reference to the embodiments.

[0034] In one embodiment, this disclosure provides a platform scale for use with a weighing pit, which is formed on a working surface. The platform scale of this disclosure includes a base 1, which has a mounting groove. A weight sensor 2 and a platform 3 mounted on the weight sensor 2 are disposed in the mounting groove. The base 1 is suspended in the weighing pit.

[0035] In detail, the shape of the weighing pit is adapted to the shape of the platform scale, so that the base 1 of the platform scale can be suspended in the weighing pit. In this way, the lower side of the base 1 does not contact the bottom of the weighing pit, and the supporting surface of the platform scale is not the lower side of the base 1, thereby lowering the center of gravity of the platform scale. Even if the items are not placed on the center area of ​​the platform 3, or if the items are stacked high or have an irregular shape, the platform scale will not tilt or even tip over.

[0036] Furthermore, the suspended base 1 reduces the accuracy requirements of the weighing pit. If the lower side of the base 1 abuts against the ground of the weighing pit to support the platform scale, the bottom surface of the weighing pit needs to be as flat as possible to avoid unevenness that could cause the platform scale to tilt. At the same time, if the platform scale is not placed stably, it will also affect the measurement accuracy. Therefore, the platform scale disclosed in this invention has a simple structure, better stability, and is easy and inexpensive to manufacture.

[0037] When an item is placed on the platform of the electronic platform scale, its weight is transmitted to the weight sensor 2 through the platform. The weight sensor 2 is a device that converts physical weight into a measurable electrical signal. The output analog signal needs to be amplified, filtered, and converted from analog to digital before being processed by the processor of the electronic platform scale and displayed as a digital weight value. The bottom of the weight sensor 2 is usually fixed to the base 1 of the platform scale with bolts. The tightening torque of the bolts needs to be precisely controlled to avoid force transmission deviation caused by loosening, and to prevent pre-deformation of the elastic element of the weight sensor 2 due to overtightening. At the same time, a metal shim or elastic buffer pad can be installed between the top of the weight sensor 2 and the platform 3. The shim not only fills the small gaps in the mounting surface to ensure complete contact of the force-bearing surface, but also absorbs some energy when the platform scale is impacted, reducing instantaneous impact damage to the weight sensor 2.

[0038] See Figure 1 In one embodiment, the loading surface of the stage 3 of this disclosure has a vertical preset distance between the loading surface and the working surface, and the vertical preset distance ranges from 0 to 6 mm.

[0039] In detail, the vertical preset distance between the loading surface and the working surface of the platform 3 disclosed herein is 0-6mm, thereby ensuring that the vertical distance between the loading surface and the working surface is small, reducing the difficulty of placing items on the loading surface, and making it easier to pick up and put down items, improving operational efficiency, reducing the swaying amplitude of the platform 3 caused by external forces during weighing, and concentrating the center of gravity of the platform scale more on the base 1, making the structure more stable, and preventing parts from loosening or deforming during long-term use, thus extending the service life of the platform scale equipment, and without taking up too much additional vertical space.

[0040] See Figure 1 In one embodiment, the loading surface of the stage 3 and the working surface are at the same height.

[0041] In this way, the loading surface of the platform 3 is at the same height as the working surface. The items can be smoothly pushed directly from the working surface to the platform 3 by sliding or rolling without overcoming the resistance caused by the height difference. This avoids the need to move the items up and down before and after weighing, making the weighing operation more time-saving and labor-saving. In addition, compared with the case where the loading surface is lower than the working surface, it can reduce the fatigue damage of the weight sensor 2 caused by impact and extend the life of the platform scale.

[0042] See Figure 1 In one embodiment of this disclosure, the groove opening of the mounting groove is bent outward to form an overlapping portion 11, and a sinkhole is provided at the edge of the weighing pit. The sinkhole is configured to abut against the lower surface of the overlapping portion 11 so that the upper surface of the overlapping portion 11 is at the same height as the working surface, and the upper surface of the overlapping portion 11 is at the same height as the loading surface of the platform 3.

[0043] In detail, the groove of the mounting slot is bent outward to form an overlapping part 11, and the overlapping part 11 overlaps with the edge of the weighing pit, so that the platform scale can be suspended in the weighing pit. In this way, there is a vertical gap between the base 1 of the platform scale and the bottom surface of the weighing pit. The bottom surface of the weighing pit does not need to support the platform scale. Instead, the overlapping part 11 cooperates with the edge of the weighing pit to support the entire platform scale. This makes the fulcrum of the platform scale the same height as the loading platform 3, and the center of gravity of the platform scale is relatively low. Even if the item is placed on the edge of the platform scale, it will not cause the platform scale to tip over, avoiding damage to the platform scale equipment and weighing data errors caused by accidental collisions.

[0044] Furthermore, a settling groove is provided at the edge of the weighing pit, which surrounds the platform scale and abuts against the lower surface of the overlapping part 11, so that the upper surface of the overlapping part 11 is at the same height as the working surface and the upper surface of the overlapping part 11 is at the same height as the carrying surface. In this way, the carrying surface, the upper surface of the overlapping part 11, and the working surface are at the same height, and the items can be smoothly pushed directly from the working surface to the carrying platform 3 by sliding, rolling, etc., without having to overcome the resistance caused by the height difference. This avoids the operation of moving items up and down before and after weighing, making the weighing operation time-saving and labor-saving.

[0045] Meanwhile, the overlapping part 11 on the base 1 of the platform scale can also protect the edge of the weighing pit, preventing wear and tear on the edge of the weighing pit after long-term use, which would cause the platform scale to be placed unstable and affect the weighing accuracy. Specifically, heavy items will exert a large impact force on the edge of the weighing pit when they are put on and off the scale. If the edge is not reinforced, the edge of the weighing pit may crack and deform after long-term use, causing the platform scale to become unstable. By protecting the structural integrity of the edge of the weighing pit, problems such as weight sensor 2 failure and platform scale tilting caused by edge damage can be reduced, thereby extending the life of the platform scale.

[0046] In one embodiment, the overlapping portion 11 of this disclosure can be made of angle steel, which effectively improves the rigidity of the overlapping portion 11, avoids structural deformation, effectively protects the edge of the weighing pit, and thus ensures the stability of the platform scale in the suspended setting.

[0047] See Figure 1 In one embodiment of this disclosure, the base 1 includes a main support portion 12 disposed in the middle, and the two sides of the main support portion 12 extend outward to form extended portions 13, and the thickness of the main support portion 12 is greater than the thickness of the extended portions 13; and / or, the platform 3 includes a main load portion 31 disposed in the middle, and the two sides of the main load portion 31 extend outward to form extended portions 32, and the thickness of the main load portion 31 is greater than the thickness of the extended portions 32.

[0048] Specifically, a main support portion 12 is provided in the middle of the base 1, and extended portions 13 are formed by extending outwards on both sides of the main support portion 12. The thickness of the main support portion 12 is greater than the thickness of the extended portions 13. This reduces the weight of the base 1, reduces the pressure on the overlapping portion 11 and the edge of the weighing pit, and prevents structural deformation of the overlapping portion 11 and damage to the edge of the weighing pit. Furthermore, the thicker main support portion 12 in the middle still has sufficient support strength to support the weight sensor 2 and the platform 3 above, and will not bend or deform when weighing heavy items.

[0049] In one embodiment of this disclosure, a main loading section 31 is provided in the center of the platform 3, and extension sections 32 extend outward from both sides of the main loading section 31. The thickness of the main loading section 31 is greater than the thickness of the extension sections 32. This reduces the weight of the platform 3, lowers the pressure of the platform 3 on the weight sensor 2, and further reduces the pressure on the overlapping section 11 and the edge of the weighing pit, preventing structural deformation of the overlapping section 11 and damage to the edge of the weighing pit. Furthermore, since the item needs to be placed in the center of the loading surface during weighing to avoid excessive tilting of the platform 3 and compression of the weight sensor 2, the platform 3 has a thicker main loading section 31 in the center, providing sufficient rigidity for support. The extension sections 32 on both sides provide a larger loading area, allowing for the weighing of larger items and assisting the main loading section 31 in providing support. This expands the working area of ​​the platform 3, enabling the platform scale of this disclosure to weigh larger items without the need to purchase a different type of electronic platform scale.

[0050] See Figure 1 In one embodiment of this disclosure, the thickness ratio of the extended portion 13 to the thickness of the main support portion 12 is 1:3-1:5; and / or, the thickness ratio of the extension portion 32 to the thickness of the main support portion 31 is 1:3-1:5.

[0051] In this way, the ratio of the thickness of the extended part 13 to the thickness of the main support part 12 is set to 1:3-1:5, so that the main support part 12 has sufficient support strength, and there is a large vertical gap between the extended part 13 and the platform 3. Therefore, even if dust and small debris fall into the platform scale through the gap between the platform 3 and the overlapping part 11, it will not affect the normal operation of the platform 3. It only needs to be cleaned regularly.

[0052] In one embodiment of this disclosure, the thickness ratio of the extension 32 to the thickness of the main load portion 31 is set to 1:3-1:5, so that the main load portion 31 has sufficient supporting strength, and the extension 32 can also provide auxiliary support and transition function, allowing items to be smoothly pushed onto the main load portion 31. At the same time, there is a large vertical gap between the extension 32 and the base 1, so even if dust and small debris fall into the platform scale through the gap between the platform 3 and the overlapping part 11, it will not affect the normal operation of the platform 3.

[0053] Furthermore, in one embodiment of this disclosure, the ratio of the thickness of the extended portion 13 to the thickness of the main support portion 12 is set to 1:3-1:5, and the ratio of the thickness of the extension portion 32 to the thickness of the main load portion 31 is set to 1:3-1:5. In this way, while the main load portion 31 and the main support portion 12 of the platform scale are working normally, there is a large vertical distance between the extension portion 32 and the extended portion 13, so that debris is not easy to block the gap between the platform 3 and the overlapping portion 11, and debris that falls into the gap can be cleaned up regularly.

[0054] See Figure 2 In one embodiment, the base 1 of this disclosure includes a support frame 14 and a bearing plate 15. The support frame 14 is formed by connecting multiple longitudinal beams and transverse beams. The bottom of the support frame 14 is provided with a support beam to fix the bearing plate 15. A weight sensor 2 and a platform 3 are provided on the bearing plate 15.

[0055] In detail, the support frame 14 is a square frame welded together by multiple longitudinal beams and multiple transverse beams. An angle steel ring is welded to the top of the square frame, and the angle steel overlaps with the edge of the weighing pit so that the support frame 14 can be suspended in the weighing pit. Furthermore, a support beam is provided at the middle of the bottom of the support frame 14 to fix the bearing plate 15, thereby fixing the bearing plate 15 to the support frame 14. Then, a weight sensor 2 and a platform 3 are provided above the bearing plate 15.

[0056] Thus, the support frame 14 of this disclosure has high rigidity, stable connection, and light weight, making it easy to move and transport. Therefore, the platform scale of this disclosure can be assembled and placed in the weighing pit for easy operation. At the same time, it is also easy to remove the platform scale from the weighing pit after long-term use for maintenance, adjustment, and cleaning of debris in the weighing pit.

[0057] In one embodiment, the platform scale of this disclosure is further provided with an alarm device, which is configured to issue an alarm when the platform 3 is loaded and deviates beyond a preset safe deviation range.

[0058] In detail, this disclosure provides an alarm device on the platform scale. When the platform 3 changes from an empty state to a loaded state, the platform 3 is displaced and exerts pressure on the weight sensor 2. This prevents the items placed on the platform 3 from being misaligned, causing the platform 3 to tilt to one side and collide with the extension part 13. The alarm device will then sound an alarm.

[0059] In this way, the platform 3 is prevented from being severely tilted and colliding, which could even cause permanent deformation of the weight sensor 2 or make the weight sensor 2 completely malfunction, causing the platform scale to malfunction. The alarm device will then sound an alarm, and the staff can promptly put the items back into the middle of the platform 3 or push them away from the platform 3 to avoid damage to the platform 3 and the weight sensor 2.

[0060] See Figure 1 In one embodiment of this disclosure, the alarm device includes an alarm element and at least three proximity switches 4; the at least three proximity switches 4 are evenly arranged in the mounting groove or on the platform 3 and are electrically connected to the alarm element. The proximity switches 4 are configured to send an electrical signal to trigger the alarm element to issue an alarm after detecting that the edge deflection distance of the platform 3 after being loaded exceeds a preset safety distance.

[0061] In detail, at least three proximity switches 4 are evenly arranged around the mounting slot or on the platform 3 and are electrically connected to the alarm element. In this way, if the item to be weighed is placed on the edge of the platform 3, causing uneven force on the platform 3 and resulting in tilting and elastic deformation, when the deformation is small, the proximity switches 4 will not detect it, the platform scale can weigh normally and will not affect the accuracy of the weight sensor 2. When the deformation is large, the proximity switches 4 will detect that the distance the edge of the platform 3 has moved down exceeds the preset safety distance, and the proximity switches 4 will send an electrical signal to trigger the alarm element to sound an alarm.

[0062] Among them, the proximity switch 4 is a non-contact sensor that outputs a switching signal by detecting changes in the distance between an object and the sensing surface. It can realize functions such as position detection, counting, and positioning without mechanical contact. The alarm element can emit alarms such as flashing lights, voice alerts, and continuous ringing alerts. The alarm element can be an LED flashing light, a voice broadcaster, a buzzer, etc., and no limitation is made in this disclosure.

[0063] See Figure 1 and Figure 2 In one embodiment of this disclosure, the mounting groove is a square groove, and a plurality of proximity switches 4 are arranged in a ring at intervals within the mounting groove; or, a plurality of proximity switches 4 are arranged in a ring at intervals on the lower side of the edge of the platform 3.

[0064] In detail, the platform scale is a square platform scale, and the mounting slot of its base 1 is a square slot, and a square weighing pit is set to match the platform scale. The square structure fits the rectangular outline of most placement scenarios, which can maximize the use of the working surface space. In addition, the square structure is easier to standardize cutting and assembly in the manufacturing process, which can improve the accuracy of the platform scale components and indirectly ensure the stability during weighing.

[0065] Multiple proximity switches 4 are arranged in a ring at intervals in the mounting slot, which can monitor the edge area of ​​the platform 3 in all directions without blind spots. When the object is placed close to the edge, the signal can be quickly captured. The multiple proximity switches 4 arranged at intervals can more accurately judge the degree of eccentricity of the object and adjust the dynamic balance of the platform scale in time to avoid the platform 3 from tilting. At the same time, the eccentric load will not damage the weight sensor 2 of the platform scale.

[0066] Furthermore, four proximity switches 4 can be set, with each proximity switch 4 located at the top corner of the square platform 3. In this way, the present invention can detect the distance of the skew of each side edge of the platform 3 with an appropriate number of proximity switches 4, and adjust the position of the item on the platform 3 in a timely manner to avoid inaccurate readings of the platform scale.

[0067] In one embodiment of this disclosure, multiple proximity switches 4 are arranged in a ring at intervals on the lower side of the edge of the platform 3, thereby enabling all-round, blind-spot-free monitoring of the edge area of ​​the platform 3. When an item is placed close to the edge, a signal can be quickly captured. Compared with a single proximity switch 4, multiple proximity switches 4 arranged at intervals can more accurately determine the degree of eccentricity of the item, adjust the dynamic balance of the platform scale in time, avoid tilting of the platform 3, and prevent eccentric load from damaging the weight sensor 2 of the platform scale.

[0068] The working principle of the platform scale provided in this disclosure will be further explained next using an application scenario.

[0069] First, after the platform scale of this disclosure is assembled, a matching weighing pit is opened on the working surface. The workers connect the overlapping part 11 with the sinkhole at the edge of the weighing pit, thereby suspending the base 1 in the weighing pit. The loading surface of the platform 3 of the platform scale, the upper surface of the overlapping part 11 and the working surface are at the same height.

[0070] When weighing, if the weight of the item is small, the staff can directly pick up the item and place it on the main load section 31 in the middle of the loading platform 3 for weighing; if the volume of the item is large, the staff can push the item onto the loading surface, and there will be no height difference in the middle to hinder the pushing of the item; if the weight of the item is large, the staff can use a trolley to transport the item onto the loading surface, and there will be no height difference in the middle to hinder the trolley from moving forward, making the weighing operation time-saving and labor-saving.

[0071] Subsequently, the platform 3 is displaced by the force, and the physical weight is converted into a measurable electrical signal by the weight sensor 2. This signal is then processed by the scale's processor and displayed as a digital weight value. If the item is overweight or not placed in the center of the platform, the proximity switch 4 detects that the edge of the platform 3 has moved down a distance exceeding a preset safety distance and sends an electrical signal to trigger the alarm element to emit an audible alarm.

[0072] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A platform scale, the platform scale being used to cooperate with a weighing pit, the weighing pit being formed on a working surface, characterized in that, The platform scale includes: The base (1) has a mounting groove, in which a weight sensor (2) and a platform (3) are provided. The base (1) is suspended in the weighing pit.

2. The platform scale according to claim 1, characterized in that, The loading surface of the stage (3) and the working surface have a vertical preset distance, the range of which is 0-6mm.

3. The platform scale according to claim 2, characterized in that, The loading surface of the stage (3) is at the same height as the working surface.

4. The platform scale according to any one of claims 1 to 3, characterized in that, The groove of the mounting slot is bent outward to form an overlap (11). The edge of the weighing pit is provided with a sinking groove. The sinking groove is constructed to abut against the lower surface of the overlap (11) so that the upper surface of the overlap (11) is at the same height as the working surface, and the upper surface of the overlap (11) is at the same height as the loading surface of the platform (3).

5. The platform scale according to claim 4, characterized in that, The base (1) includes a main support portion (12) disposed in the middle, with extension portions (13) extending outward on both sides of the main support portion (12), and the thickness of the main support portion (12) being greater than the thickness of the extension portions (13); and / or, The stage (3) includes a main loading section (31) located in the middle, with extensions (32) extending outward from both sides of the main loading section (31), and the thickness of the main loading section (31) is greater than the thickness of the extensions (32).

6. The platform scale according to claim 5, characterized in that, The thickness ratio of the extended portion (13) to the thickness of the main supporting portion (12) is 1:3-1:5; and / or, The thickness ratio of the extension (32) to the thickness of the main carrier (31) is 1:3-1:

5.

7. The platform scale according to claim 4, characterized in that, The base (1) includes: A support frame (14) is formed by connecting longitudinal beams and transverse beams, and a support beam is provided at the bottom of the support frame (14); The bearing plate (15) is fixedly mounted on the support beam, and the weight sensor (2) and the platform (3) are provided on the bearing plate (15).

8. The platform scale according to any one of claims 5 to 7, characterized in that, The platform scale is also equipped with an alarm device, which is configured to issue an alarm when the platform (3) is loaded and deviates beyond a preset safe deviation range.

9. The platform scale according to claim 8, characterized in that, The alarm device includes: Alarm element; At least three proximity switches (4) are evenly arranged in the mounting slot or on the platform (3) and electrically connected to the alarm element. The proximity switches (4) are configured to send an electrical signal to trigger the alarm element to issue an alarm after detecting that the edge deviation distance of the platform (3) after being loaded exceeds a preset safety distance.

10. The platform scale according to claim 9, characterized in that, The mounting slot is a square slot, and multiple proximity switches (4) are arranged in a ring at intervals within the mounting slot; or... Multiple proximity switches (4) are arranged in a ring at intervals on the lower side of the edge of the stage (3).

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