s-shaped load cell

Abstract

This utility model belongs to the field of weighing sensor technology, specifically relating to an S-type weighing sensor. The new model includes: an S-type elastomer, comprising: a central portion and connecting portions offset from the upper and lower sides of the central portion; and two limiting members offset from the upper and lower sides of the central portion to limit the corresponding connecting portions. By setting the limiting members offset from the upper and lower sides of the central portion, this S-type weighing sensor restricts the relative position of the connecting portions. When the sensor is subjected to overload, the limiting members contact the connecting portions, preventing excessive displacement of the connecting portions and avoiding plastic deformation of the S-type elastomer, thereby achieving the effect of preventing excessive displacement of the connecting portions.

Description

Technical Field

[0001] This utility model belongs to the field of weighing sensor technology, specifically relating to an S-type weighing sensor. Background Technology

[0002] S-type load cells are widely used in various weighing systems due to their unique "S"-shaped structure. They are especially suitable for applications where space is limited and high-precision weighing is required, such as electronic scales and batching systems.

[0003] In practical use, the weighing environment is complex and variable, and various unexpected situations may occur that cause the force applied to the sensor to momentarily exceed its measuring range. When such an overload occurs, due to the lack of limit protection, the sensor's critical elastic component is highly susceptible to plastic deformation. Once the elastic component undergoes plastic deformation, it cannot return to its initial state, thus altering the sensor's output characteristics and severely affecting weighing accuracy. Furthermore, excessive force may also damage the strain gauge. The strain gauge is the core component of the S-type load cell that converts force signals into electrical signals. The stress generated by overload may cause irreversible changes in the strain gauge's resistance value, or even break the strain gauge's circuitry, rendering the sensor malfunctioning. Both plastic deformation of the elastic component and damage to the strain gauge can ultimately lead to sensor failure, requiring repair or replacement.

[0004] Therefore, in order to solve the above problems, it is necessary to design an S-type load cell. Utility Model Content

[0005] The purpose of this invention is to provide an S-type weighing sensor to solve the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides an S-type weighing sensor, comprising:

[0007] S-shaped elastomer, comprising: a central portion and a connecting portion that is misaligned and connected to the upper and lower sides of the central portion;

[0008] Two limiting components are offset and set on the upper and lower sides of the middle part to limit the corresponding connecting parts.

[0009] Furthermore, the upper and lower sides of the middle section are offset to provide mounting positions for limiting components; wherein

[0010] The two limiting components are located within the corresponding limiting component mounting positions.

[0011] Furthermore, the middle side is provided with four rectangular first through holes; wherein

[0012] The first through holes are connected to the corresponding limiting component mounting positions;

[0013] The limiting member is provided with a second through hole; wherein

[0014] The two first through holes and the corresponding second through holes are concentrically arranged; and

[0015] A pin is provided inside the first through hole;

[0016] The pin is adapted to be inserted into the second through hole to limit the position of the limiting member.

[0017] Furthermore, a third through hole is provided in the middle part;

[0018] The third through hole is provided with at least four electrically connected strain gauges; wherein

[0019] The strain gauges are arranged in a ring array on the inner wall of the first through hole.

[0020] Furthermore, the side of the middle section is provided with a fourth through hole that communicates with the third through hole;

[0021] A cable is installed inside the fourth through hole; wherein

[0022] The cables are electrically connected to each strain gauge.

[0023] Furthermore, placement positions are provided on both sides of the middle section; wherein

[0024] The two placement positions are connected to the third through hole;

[0025] The placement position is equipped with a sealing element; and

[0026] The contact area between the placement position and the sealant is coated with sealant.

[0027] Furthermore, protective plates are provided on both sides of the middle section;

[0028] The pin has threaded holes on both sides;

[0029] The threaded hole is internally threaded with a bolt; wherein

[0030] The bolt is adapted to penetrate the protective plate and engage with the threaded hole.

[0031] Furthermore, the connecting part is provided with a threaded through hole.

[0032] The beneficial effects of this utility model are:

[0033] (I) By setting a limiting member, which is staggered on the upper and lower sides of the middle part, the relative position of the connecting part is restricted. When the sensor is overloaded, the limiting member contacts the connecting part, preventing the connecting part from displacing excessively and avoiding plastic deformation of the S-shaped elastomer, thereby achieving the effect of preventing excessive displacement of the connecting part.

[0034] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is an exploded view of a preferred embodiment of the present invention.

[0038] Figure 2 The three-dimensional representation of the preferred embodiment of this utility model. Figure 1 ;

[0039] Figure 3 The three-dimensional representation of the preferred embodiment of this utility model. Figure 2 .

[0040] In the picture:

[0041] S-shaped elastomer 1, middle part 11, limiting member mounting position 111, first through hole 112, third through hole 113, fourth through hole 114, placement position 115, connecting part 12, threaded through hole 121;

[0042] Limiting component 2, second through hole 21;

[0043] Pin 3, threaded hole 31;

[0044] 4. Strain gauge; 5. Cable; 6. Seal; 7. Protective plate; 8. Bolt. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions 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, not all embodiments. 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. Example 1

[0046] like Figures 1 to 3 As shown, this embodiment provides an S-type weighing sensor, including:

[0047] The S-shaped elastomer 1 includes: a central part 11 and connecting parts 12 that are offset from the upper and lower sides of the central part 11; two limiting members 2, which are offset from the upper and lower sides of the central part 11 to limit the corresponding connecting parts 12; wherein the S-shaped elastomer 1 is, but is not limited to, an aluminum elastomer; wherein the connecting parts 12 are offset from the upper and lower sides of the central part 11 to form an "S" shaped overall structure; wherein in the initial state, the limiting members 2 do not contact the connecting parts 12.

[0048] In this embodiment, by setting a limiting member 2 and offsetting it to the upper and lower sides of the middle part 11, the relative position of the connecting part 12 is restricted. When the sensor is subjected to overload, the limiting member 2 contacts the connecting part 12, preventing the connecting part 12 from displacing excessively and avoiding plastic deformation of the S-shaped elastomer 1, thereby achieving the effect of preventing the connecting part 12 from displacing excessively.

[0049] The upper and lower sides of the middle part 11 are provided with offset limit member mounting positions 111; wherein the two limit members 2 are located in the corresponding limit member mounting positions 111; wherein the effect of installing the limit member 2 is achieved by setting the limit member mounting positions 111.

[0050] The middle part 11 has four rectangular first through holes 112 on its side; two of the first through holes 112 are connected to the corresponding limiting member mounting positions 111; the limiting member 2 has a second through hole 21; the two first through holes 112 and the corresponding second through holes 21 are concentrically arranged; and a pin 3 is provided in the first through hole 112; the pin 3 is adapted to be inserted into the second through hole 21 to limit the limiting member 2; wherein by setting the pin 3 to be inserted into the first through hole 112 and the second through hole 21, the limiting member 2 is prevented from moving.

[0051] The middle part 11 is provided with a third through hole 113; at least four electrically connected strain gauges 4 are provided in the third through hole 113; wherein each strain gauge 4 is arranged in a ring array on the inner wall of the first through hole 112; wherein when the middle part 11 of the S-shaped elastic body 1 is subjected to load deformation, the strain gauge 4 deforms synchronously with the inner wall of the third through hole 113, and its resistance value changes accordingly, converting the mechanical deformation signal into an electrical signal.

[0052] The side of the middle part 11 is provided with a fourth through hole 114 that communicates with the third through hole 113; a cable 5 is provided in the fourth through hole 114; wherein the cable 5 is electrically connected to each strain gauge 4; wherein by providing the cable 5 in the fourth through hole 114 and electrically connecting the cable 5 to each strain gauge 4, the electrical signal generated by the strain gauge 4 is transmitted to an external signal processing device, thereby realizing signal export and subsequent processing.

[0053] The middle part 11 has placement positions 115 on both sides; the two placement positions 115 are connected to the third through hole 113; a sealing element 6 is provided in the placement position 115; and the contact area between the placement position 115 and the sealing element 6 is coated with sealant; by setting the sealing element 6 in the placement position 115 and coating the contact area with sealant, a double sealing structure is formed to prevent external moisture, dust and other impurities from entering the third through hole 113, thereby protecting the strain gauge 4 from environmental factors and extending the service life of the sensor.

[0054] The middle part 11 is provided with protective plates 7 on both sides; the pin 3 is provided with threaded holes 31 on both sides; the threaded holes 31 are internally threaded with bolts 8; wherein the bolts 8 are adapted to penetrate the protective plates 7 and engage with the threaded holes 31; wherein by providing protective plates 7, mechanical protection is provided for the pin 3, strain gauge and seal 6 to prevent external collisions; wherein by providing bolts 8 to engage with the threaded holes 31, the protective plates 7 are fixed and the pin 3 is limited to prevent the pin 3 from moving.

[0055] The connecting part 12 is provided with a threaded through hole 121; by providing the threaded through hole 121, it is possible to facilitate mechanical connection with external equipment, realize load transmission and installation fixation.

[0056] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0057] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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.

[0058] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An S-type load cell, characterized in that, include: S-shaped elastomer (1) includes: a middle part (11) and a connecting part (12) that is misaligned with the upper and lower sides of the middle part (11). Two limiting members (2) are offset on the upper and lower sides of the middle part (11) to limit the corresponding connecting part (12).

2. The S-type weighing sensor as described in claim 1, characterized in that, The middle part (11) is provided with a limiting component mounting position (111) on the upper and lower sides with a misalignment; wherein The two limiting members (2) are located within the corresponding limiting member mounting positions (111).

3. The S-type weighing sensor as described in claim 2, characterized in that, The middle part (11) has four rectangular first through holes (112) on its side; wherein The two first through holes (112) are connected to the corresponding limiting member mounting positions (111); The limiting member (2) is provided with a second through hole (21); wherein The two first through holes (112) and the corresponding second through holes (21) are concentrically arranged; and A pin (3) is provided inside the first through hole (112); The pin (3) is adapted to be inserted into the second through hole (21) to limit the limiting member (2).

4. The S-type weighing sensor as described in claim 3, characterized in that, A third through hole (113) is provided on the middle part (11). The third through hole (113) is provided with at least four electrically connected strain gauges (4); wherein Each strain gauge (4) is arranged in a ring array on the inner wall of the first through hole (112).

5. The S-type weighing sensor as described in claim 4, characterized in that, The middle part (11) has a fourth through hole (114) on its side that communicates with the third through hole (113). A cable (5) is provided inside the fourth through hole (114); wherein The cable (5) is electrically connected to each strain gauge (4).

6. The S-type weighing sensor as described in claim 5, characterized in that, The middle part (11) has placement positions (115) on both sides; wherein The two placement positions (115) are connected to the third through hole (113); The placement position (115) is provided with a sealing element (6); and The contact area between the placement position (115) and the sealant (6) is coated with sealant.

7. The S-type weighing sensor as described in claim 6, characterized in that, Protective plates (7) are provided on both sides of the middle part (11). The pin (3) has threaded holes (31) on both sides. The threaded hole (31) is internally threaded with a bolt (8); wherein The bolt (8) is adapted to penetrate the protective plate (7) and engage with the threaded hole (31).

8. The S-type weighing sensor as described in claim 7, characterized in that, The connecting part (12) is provided with a threaded through hole (121).

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