weighing apparatus
By integrating a transmitter box and control unit into the weighing equipment, the weighing signal can be directly processed and output, solving the problems of simple functions, large size and high complexity of existing equipment, and realizing the simplification of equipment structure and reduction of space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- METTLER TOLEDO (CHANGZHOU) MEASUREMENT TECH CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-21
AI Technical Summary
Existing weighing equipment is simple in function, large in size and complex. It needs to be connected to external devices such as external instruments through signal cables to process the analog signals of the sensors, which takes up space and increases complexity.
A weighing device was designed, comprising an upper weighing platform, a lower weighing platform, a weighing sensor, and a transmitter box. The transmitter box has a built-in AD/DA conversion circuit and a control unit, which can directly process and output analog or digital signals, reducing the dependence on external signal processing equipment and simplifying the structure.
It enables rapid processing and output of weighing signals without configuring signal processing equipment, simplifies the structure, and reduces the space occupied by the equipment.
Smart Images
Figure CN224535220U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of weighing technology, and specifically relates to a weighing device. Background Technology
[0002] In fields such as semiconductors, chemicals, and automation control, weighing equipment is often used to detect the real-time weight of storage containers in order to determine whether the storage containers are leaking.
[0003] Existing weighing equipment has simple functions, requiring connection to external devices such as external instruments via signal cables. These instruments and signal processing equipment process the analog signals transmitted from sensors before outputting the processed analog signals to devices such as PLCs. This signal processing equipment occupies a significant amount of space and increases the complexity of the weighing equipment.
[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0005] The purpose of this utility model is to provide a weighing device that solves the problems of existing weighing devices being simple in function, large in size, and highly complex.
[0006] To achieve the above objectives, a specific embodiment of this utility model provides a weighing device, including an upper weighing platform, a lower weighing platform, a load cell, and a transmitter box. The upper and lower weighing platforms are arranged opposite to each other. The load cell is located on the side of the lower weighing platform facing the upper weighing platform and serves to support the upper weighing platform. The transmitter box is located on the side of the lower weighing platform facing the upper weighing platform and is electrically connected to the load cell. The transmitter box is used to output the analog signal transmitted by the load cell, or to convert the analog signal transmitted by the load cell into a digital signal and output it. The transmitter box is equipped with a calibration button for calibrating the weighing device.
[0007] In one or more embodiments of this utility model, the calibration button is located on the side of the transmitter box.
[0008] In one or more embodiments of this utility model, the weighing device further includes a cover covering the upper weighing platform, and a window for exposing the calibration button is opened on the side of the cover.
[0009] In one or more embodiments of this utility model, an adapter is provided on the side of the transmitter box. The adapter includes a small diameter section connected to the transmitter box and a large diameter section located on the side of the small diameter section away from the transmitter box.
[0010] In one or more embodiments of this utility model, the transmitter box is connected to any one or more of the weighing sensor, the first external device, and the second external device via a cable. The end of the cable is provided with a connector, which is threadedly connected to an adapter.
[0011] In one or more embodiments of this utility model, a planar extension portion is formed on the peripheral wall of the large-diameter section.
[0012] In one or more embodiments of this utility model, a sealing gasket is provided between the transmitter box and the lower weighing platform.
[0013] In one or more embodiments of this utility model, a limiting post is provided on the lower weighing platform, extending upward through the upper weighing platform, and a limiting member is provided on the limiting post that protrudes radially and is located below the upper weighing platform.
[0014] In one or more embodiments of this utility model, the limiting post is a bolt and the limiting element is a nut.
[0015] In one or more embodiments of the present invention, the weighing device further includes a cover over the upper weighing platform and a buffer plate disposed between the upper weighing platform and the cover, the buffer plate being made of an elastic material.
[0016] Compared with the prior art, the transmitter box of the weighing device in this invention can quickly process and output weighing signals without configuring signal processing equipment, which simplifies the structure of the weighing device and reduces the space occupied by the weighing device. Attached Figure Description
[0017] 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a side view of the weighing device in one embodiment of the present invention;
[0019] Figure 2 This is an exploded view of the weighing device in one embodiment of the present invention.
[0020] Figure 3 This is an exploded view of the weighing device in one embodiment of the present invention from another perspective;
[0021] Figure 4 This is a schematic diagram of the transmitter box in one embodiment of the present invention.
[0022] Key reference numerals in the attached drawings: 1. Upper weighing platform; 2. Lower weighing platform; 3. Weighing sensor; 4. Transmitter box; 41. Control unit; 42. AD conversion circuit; 43. DA conversion circuit; 44. Calibration button; 45. Adapter; 451. Small diameter section; 452. Large diameter section; 5. Cover; 51. Window; 6. Cable; 7. Connector; 8. Sealing gasket; 9. Limiting post; 10. Limiting component; 11. Buffer plate; 12. First external device; 13. Second external device. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, 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 embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0024] In the description of this utility model, it should be understood that the terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.
[0025] Furthermore, the terms "second" and "first" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "second" or "first" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] Reference Figures 1 to 3 As shown, one embodiment of the present invention provides a weighing device, which includes an upper weighing platform 1, a lower weighing platform 2, a weighing sensor 3, a transmitter box 4, and a cover 5.
[0027] Specifically, the upper weighing platform 1 and the lower weighing platform 2 are arranged roughly vertically opposite each other, maintaining a certain distance. The load cell 3 is located on the side of the lower weighing platform 2 facing the upper weighing platform 1, with its top connected to the upper weighing platform 1 to support it. The transmitter box 4 is located on the side of the lower weighing platform 2 facing the upper weighing platform 1 and is electrically connected to the load cell 3. The transmitter box 4 is spaced apart from the upper weighing platform 1 and does not bear the force transmitted by the upper weighing platform 1. The transmitter box 4 contains a control unit 41, an AD conversion circuit 42, and a DA conversion circuit 43. The AD conversion circuit 42 is electrically connected to the load cell 3 and the control unit 41, and the DA conversion circuit 43 is electrically connected to the control unit 41. A cover 5 is placed on the upper weighing platform 1 to cover the load cell 3 and the transmitter box 4.
[0028] The AD conversion circuit 42 is used to convert the analog signal output by the weighing sensor 3 into a digital signal. After the control unit 41 processes the received digital signal, it can use the communication circuit to transmit the processed digital signal to the first external device 12. The weighing data is displayed to the operator through the first external device 12. The first external device 12 includes, but is not limited to, printers, personal computers, server computers, workstations, desktop computers, laptop computers, notebook computers, mobile electronic devices, smartphones, tablet computers, cellular phones, personal digital assistants (PDAs), handheld devices, messaging devices, wearable electronic devices, consumer electronic devices, etc.
[0029] In addition, after processing the received digital signal, the control unit 41 can also transmit the processed digital signal to the DA conversion circuit 43, which converts the digital signal into an analog signal and then transmits it to the second external device 13 so that the second external device 13 can perform corresponding operations. The second external device 13 includes, but is not limited to, PLC and integrated cabinet.
[0030] It should be noted that the control unit 41 in the above embodiments may include a central processing unit (CPU), and may also include other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.
[0031] Optionally, the control unit 41 can be an MCU (Microcontroller Unit), that is, the control unit 41 is set as a single-chip microcomputer.
[0032] In one embodiment, reference is made to Figure 1 and Figure 2 As shown, the transmitter box 4 has several calibration buttons 44 on its side. The transmitter box 4 has a calibration circuit inside. The calibration circuit includes microswitches that correspond one-to-one with the calibration buttons 44. When the calibration button 44 is pressed or touched, the opening and closing state of the corresponding microswitch can be controlled, thereby controlling the electrical signal output by the calibration circuit to calibrate the weighing equipment, such as zero-point calibration or full-scale calibration.
[0033] Furthermore, in order to facilitate the operator to press or touch the calibration button 44, a window 51 is provided on the side of the cover 5, with the opening of the window 51 facing the calibration button 44, so as to expose the calibration button 44 and prevent the cover 5 from obstructing the calibration button 44.
[0034] In one embodiment, reference is made to Figure 2 As shown, the transmitter box 4 is electrically connected to the weighing sensor 3, the first external device 12 and the second external device 13 via the cable 6. At the connection between the cable 6 and the transmitter box 4, the transmitter box 4 is provided with an adapter 45, which is connected to the connector 7 on the cable 6.
[0035] Furthermore, the adapter 45 can be fixed to the transmitter box 4 by welding.
[0036] In one embodiment, reference is made to Figure 2 As shown, the two sides of the adapter 45 are designed differently, which can prevent mistakes and improve the installation efficiency of the adapter 45 during the installation process of the adapter 45 to the transmitter box 4.
[0037] Specifically, the adapter 45 includes a small-diameter section 451 and a large-diameter section 452 coaxially arranged, with the diameter of the small-diameter section 451 being smaller than the diameter of the large-diameter section 452. The small-diameter section 451 is connected to the transmitter box 4, and the large-diameter section 452 is located on the side of the small-diameter section 451 away from the transmitter box 4. When installing the adapter 45 onto the transmitter box 4, a circular hole is pre-drilled on the wall of the transmitter box 4, the diameter of which is adapted to the small-diameter section 451 of the adapter 45. During installation, the small-diameter section 451 of the adapter 45 is simply inserted into the circular hole on the transmitter box 4.
[0038] Furthermore, a planar extension portion is formed on the peripheral wall of the large-diameter section 452, that is, a planar surface is formed on the peripheral wall of the large-diameter section 452, so that the shape of the large-diameter section 452 is different from the shape of the small-diameter section 451, thereby improving the foolproof effect of the adapter 45.
[0039] In one embodiment, reference is made to Figure 2 As shown, the input and output ends of the adapter 45 are connected to the load cell 3, the first external device 12 and the second external device 13 via the cable 6. The end of the cable 6 is provided with a connector 7 that connects to the adapter 45. The adapter 45 and the connector 7 are connected by a threaded connection.
[0040] Specifically, the adapter 45 has an internal thread in its socket, and the connector 7 has an external thread that matches the internal thread. To connect the adapter 45 and the connector 7, insert the connector 7 into the socket of the adapter 45 and screw on the connector 7 to connect the adapter 45 and the connector 7 together.
[0041] Optionally, connector 7 may be an aviation plug to improve the sealing at the connection between adapter 45 and connector 7, and enhance the dustproof and waterproof properties of the connection between adapter 45 and connector 7.
[0042] In other embodiments, the adapter 45 and the connector 7 may also be connected by a plug-in connection.
[0043] In one embodiment, reference is made to Figure 2 As shown, a sealing gasket 8 is provided at the bottom of the transmitter box 4. After the transmitter box 4 is installed on the lower weighing platform 2, the sealing gasket 8 is tightly clamped between the transmitter box 4 and the lower weighing platform 2, which can reduce the gap between the transmitter box 4 and the lower weighing platform 2 and improve the sealing performance of the transmitter box 4.
[0044] In one embodiment, reference is made to Figure 2 and Figure 3 As shown, a limiting post 9 is provided on the lower weighing platform 2, extending upward and penetrating the upper weighing platform 1. A radially protruding limiting member 10 is provided on the limiting post 9, located below the upper weighing platform 1, to limit the movement of the upper weighing platform 1. Specifically, when the object being weighed exceeds the maximum weighing capacity of the weighing equipment, the limiting member 10 can contact the upper weighing platform 1, supporting it and preventing the upper weighing platform 1 from moving downward and damaging other components such as the weighing sensor 3 and transmitter box 4 located below it.
[0045] Furthermore, to facilitate the installation of the limiting post 9 and the limiting component 10, the limiting post 9 can be a bolt, and the limiting component 10 can be a nut. In addition, the height of the limiting component 10 can be quickly adjusted by screwing it on, so that the limiting component 10 can adapt to different maximum weighing capacities of the weighing equipment.
[0046] Furthermore, four limit posts 9 and four limit pieces 10 are provided in a one-to-one correspondence. The four limit posts 9 and four limit pieces 10 are arranged in a rectangular pattern and are respectively located at the four corners of the lower weighing platform 2.
[0047] In one embodiment, reference is made to Figure 2 and Figure 3As shown, the weighing equipment also includes a buffer plate 11, which is located between the upper weighing platform 1 and the cover 5. The buffer plate 11 has a certain elastic buffering capacity and can absorb part of the force exerted by the weighed object on the upper weighing platform 1 and the cover 5.
[0048] Furthermore, the buffer plate 11 is made of an elastic material, including but not limited to rubber.
[0049] Furthermore, the buffer plate 11 can be connected to the upper weighing platform 1 and the cover 5 by means of adhesive bonding or other methods.
[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A weighing device, characterized in that, include: The upper weighing platform (1) and the lower weighing platform (2) are set relative to each other; A weighing sensor (3) is provided on the side of the lower weighing platform (2) facing the upper weighing platform (1) and is used to support the upper weighing platform (1). The transmitter box (4) is located on the side of the lower weighing platform (2) facing the upper weighing platform (1) and is electrically connected to the weighing sensor (3). The transmitter box (4) is used to output the analog signal transmitted by the weighing sensor (3) or to convert the analog signal transmitted by the weighing sensor (3) into a digital signal and output it. The transmitter box (4) is provided with a calibration button (44), which is used to calibrate the weighing equipment.
2. The weighing device according to claim 1, characterized in that, The calibration button (44) is located on the side of the transmitter box (4).
3. The weighing device according to claim 2, characterized in that, The weighing device also includes a cover (5) covering the upper weighing platform (1), and the side of the cover (5) has a window (51) that exposes the calibration button (44).
4. The weighing device according to claim 1, characterized in that, The transmitter box (4) is provided with an adapter (45) on its side. The adapter (45) includes a small diameter section (451) connected to the transmitter box (4) and a large diameter section (452) located on the side of the small diameter section (451) away from the transmitter box (4).
5. The weighing device according to claim 4, characterized in that, The transmitter box (4) is connected to any one or more of the weighing sensor (3), the first external device (12) and the second external device (13) via a cable (6). The end of the cable (6) is provided with a connector (7), which is threadedly connected to the adapter (45).
6. The weighing device according to claim 4, characterized in that, A planar extension portion is formed on the peripheral wall of the large-diameter section (452).
7. The weighing device according to claim 1, characterized in that, A sealing gasket (8) is provided between the transmitter box (4) and the lower weighing platform (2).
8. The weighing device according to claim 1, characterized in that, The lower weighing platform (2) is provided with a limiting post (9) that extends upward through the upper weighing platform (1), and the limiting post (9) is provided with a limiting member (10) that protrudes radially and is located below the upper weighing platform (1).
9. The weighing device according to claim 8, characterized in that, The limiting post (9) is a bolt, and the limiting component (10) is a nut.
10. The weighing device according to claim 1, characterized in that, The weighing device also includes a cover (5) covering the upper weighing platform (1) and a buffer plate (11) disposed between the upper weighing platform (1) and the cover (5), the buffer plate (11) being made of elastic material.