Weighing sensor shell with dustproof and moistureproof functions

Abstract

The utility model relates to weighing equipment supporting component technical field, especially weighing sensor shell with dustproof and moistureproof function has, including casing, lid, sealing element and outgoing line sealing part, casing and lid form the closed inner chamber containing sensor, sealing element is embedded in the joint of casing and lid, fills the gap through extrusion deformation, lid flanging is attached casing outer wall and enhances sealing, outgoing line sealing part is elastic columnar structure, to double interference fit seals cable and goes out place, casing inner chamber is equipped with support platform and avoids sensor contact inner wall. The shell is sealed with the auxiliary protection through many nodes, effectively blocks dust and water vapor and invades, guarantees sensor measurement accuracy, prolongs its service life, is applicable to many fields weighing scene.

Description

Technical Field

[0001] This utility model relates to the technical field of supporting components for weighing equipment, and in particular to the housing of a weighing sensor with dustproof and moisture-proof functions. Background Technology

[0002] As a core component for precise weight measurement in industrial production, logistics warehousing, food and pharmaceutical fields, load cells' measurement accuracy and lifespan are highly dependent on the clean and dry environment of their internal sensitive components (such as strain gauges and signal processing modules). Once external dust and moisture intrude, it can easily cause short circuits in components due to moisture, accuracy drift, or corrosion of metal parts, and in severe cases, equipment shutdown. However, existing load cell housings have obvious defects in dustproof and moisture-proof design, making it difficult to meet the needs of complex environments. Specifically, the junction between the housing and the cover often uses simple flat bonding or a single layer of easily aging gasket for sealing, which can easily lead to gaps due to the loss of elasticity of the seal, allowing dust and moisture to intrude. The sensor cable exit point often only has a cable hole without a dedicated sealing structure, forming a major leakage channel. Some housings lack a support structure, causing the sensor to directly adhere to the inner wall of the housing. When the ambient temperature difference is large, the condensate generated on the inner wall of the housing can easily come into direct contact with the sensor, causing malfunctions. At the same time, some sealing components are made of materials with poor weather resistance and aging resistance, which are prone to deformation and cracking in a short period of time, losing their sealing function and failing to ensure a clean and dry environment inside the housing in the long term.

[0003] Therefore, we propose a weighing sensor housing with dustproof and moisture-proof functions. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a weighing sensor housing with dustproof and moisture-proof functions, including a housing for supporting the weighing sensor, a cover that cooperates with the housing to form a closed space, a sealing element disposed at the junction of the housing and the cover, and a wire exit seal for sealing the outlet of the sensor cable; the housing and the cover together form an inner cavity for accommodating the sensor, and the sealing element and the wire exit seal together block the communication path between the inner cavity and the external environment to achieve the dustproof and moisture-proof functions.

[0006] Preferably, the sealing element is an annular structure with a circular or rectangular cross-section, and the sealing element is embedded in an annular groove on the end face of the housing facing the cover. When the cover and the housing are fastened together, the sealing element is squeezed and deformed to fill the gap between them.

[0007] Preferably, the cover and the housing are connected by a snap or bolt, and the edge of the cover extends toward one side of the housing to form a flange, the flange is fitted with the outer wall of the housing, and the sealing element is located between the mating surfaces of the flange and the housing.

[0008] Preferably, the cable outlet sealing part is a columnar structure made of elastic material, with an axial through hole for the cable to pass through. The diameter of the through hole is smaller than the outer diameter of the cable, and the outer diameter of the cable outlet sealing part is interference-fitted with the diameter of the cable outlet hole on the housing, with an interference amount of 0.1mm-0.5mm.

[0009] Preferably, the bottom of the inner cavity of the housing is provided with a support platform that protrudes into the inner cavity. The height of the support platform is 1 / 3 to 1 / 2 of the depth of the inner cavity of the housing, which is used to support the weighing sensor to avoid the sensor directly contacting the inner wall of the housing.

[0010] Preferably, the sealing element is made of silicone rubber or nitrile rubber, the outlet sealing part is made of fluororubber, and the thickness of the sealing element is 0.5mm-2mm, and its width is consistent with the width of the mating surface of the shell and the cover.

[0011] The beneficial effects of this utility model are:

[0012] The enclosure formed by the shell and cover creates a closed inner cavity, and the double sealing barrier, constructed with seals and a cable outlet seal, effectively blocks the connection between the inner cavity and the external environment, achieving dust and moisture protection from the source and preventing damage to the sensor from external dust and moisture. The seal uses a ring-shaped structure embedded in the cover and fills the gaps through compression deformation. Combined with the fit between the cover's flange and the shell, this further enhances the sealing reliability at the shell-cover joint. The cover is secured with snap-fit ​​or bolt connections to ensure assembly stability. The cable outlet seal uses a columnar structure made of elastic material, with interference fit between the through-hole and the cable, and interference fit between the outer periphery and the cable outlet hole (0.1mm-0.5mm). The design solves the problem of dust and water leakage at the cable exit point, and the selection of specific materials (silicone rubber / nitrile rubber seals, fluororubber cable exit seals) ensures the weather resistance and durability of the sealing components. The support platform at the bottom of the inner cavity of the housing (the height of which is 1 / 3 to 1 / 2 of the inner cavity depth) not only avoids the sensor from directly contacting the inner wall of the housing to reduce the impact of condensation on the sensor, but also provides stable support for the sensor. Through the coordinated optimization of each component, the overall structure ensures the core functions of dust and moisture protection while taking into account the ease of assembly, structural stability and sensor protection, effectively extending the service life of the weighing sensor and ensuring its measurement accuracy. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0014] Figure 1This is a schematic diagram of the isometric structure of this utility model.

[0015] Figure 2 This utility model Figure 1 A frontal view of the structure.

[0016] Figure 3 This is a schematic diagram of the structure of the support strip of this utility model;

[0017] Figure 4 This is a schematic diagram of the quick-release structure in the second embodiment of the present invention.

[0018] In the attached diagram, the reference numerals are: 1. Lower support plate; 2. Upper force-bearing plate; 3. Force-bearing cavity; 4. Support bar; 501. Annular positioning seat; 502. Elastic locking block; 503. Unlocking lever; 504. Cavity; 505. Spring. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "one embodiment" or "example" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearance of an embodiment in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0022] Example 1

[0023] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a weighing sensor housing with dustproof and moisture-proof functions.

[0024] Specifically, to solve the above-mentioned technical problems, this utility model provides the following technical solution: including a housing 1 for carrying a weighing sensor, a cover 2 that cooperates with the housing 1 to form a closed space, a sealing element 3 disposed at the junction of the housing 1 and the cover 2, and a wire exit sealing part 4 for sealing the outlet of the sensor cable; the housing 1 and the cover 2 enclose an inner cavity to accommodate the sensor, and the sealing element 3 and the wire exit sealing part 4 together block the communication path between the inner cavity and the external environment to achieve dustproof and moisture-proof functions.

[0025] Furthermore, the sealing element 3 is an annular structure with a circular or rectangular cross-section, and the sealing element 3 is embedded in an annular groove on the end face of the housing 1 facing the cover 2. When the cover 2 and the housing 1 are fastened together, the sealing element 3 is squeezed and deformed to fill the gap between them.

[0026] Furthermore, the cover 2 is connected to the housing 1 by a snap or bolt, and the edge of the cover 2 extends toward one side of the housing 1 to form a flange 21. The flange 21 fits against the outer wall of the housing 1, and the sealing element 3 is located between the flange 21 and the fitting surface of the housing 1.

[0027] Furthermore, the cable outlet sealing part 4 is a columnar structure made of elastic material, with an axial through hole for the cable to pass through. The diameter of the through hole is smaller than the outer diameter of the cable, and the outer diameter of the cable outlet sealing part 4 is interference-fitted with the diameter of the cable outlet hole on the housing 1, with an interference amount of 0.1mm-0.5mm.

[0028] Furthermore, the bottom of the inner cavity of the housing 1 is provided with a support platform 11 that protrudes into the inner cavity. The height of the support platform 11 is 1 / 3 to 1 / 2 of the depth of the inner cavity of the housing 1, which is used to support the weighing sensor to avoid the sensor directly contacting the inner wall of the housing 1.

[0029] Furthermore, the material of the sealing element 3 is silicone rubber or nitrile rubber, the material of the outlet sealing part 4 is fluororubber, and the thickness of the sealing element 3 is 0.5mm-2mm, and its width is consistent with the width of the mating surface of the shell 1 and the cover 2.

[0030] Firstly, the housing 1 serves as the load-bearing foundation, and it is connected to the cover 2 via snaps or bolts to form a closed inner cavity, providing an independent housing space for the load cell. This isolates the sensor from direct contact with the external environment, forming the basic framework for dust and moisture protection. The flange 21 extending from the edge of the cover 2 fits snugly against the outer wall of the housing 1, further reducing the gap between the housing and the cover, and providing structural support for subsequent sealing.

[0031] At the junction of the housing 1 and the cover 2, the sealing element 3 achieves a primary seal through embedding and compression deformation: the sealing element 3 is an annular structure with a circular or rectangular cross-section, pre-embedded in the annular groove of the housing 1 facing the cover 2, and its material is silicone rubber or nitrile rubber with good elasticity; when the cover 2 and the housing 1 are fastened and fixed, the sealing element 3 is squeezed by the contact surface of the cover 2, and fills the tiny gap between the housing and the cover due to elastic deformation, and the thickness of the sealing element 3 is 0.5mm-2mm, which matches the width of the joint surface, ensuring sufficient sealing area, thereby blocking the path of dust and moisture intrusion from the joint gap.

[0032] To address the weak point at the sensor cable exit, the cable exit seal 4 achieves a two-stage seal through a double interference fit: the cable exit seal 4 is a columnar elastic structure made of fluororubber, with an axial through-hole diameter smaller than the cable's outer diameter and an outer circumferential diameter larger than the cable exit hole diameter of the housing 1 by an interference fit of 0.1mm-0.5mm; when the cable passes through the through-hole, the elastic material tightly fits the outer circumference of the cable due to the through-hole being stretched open, while its outer circumference and the inner wall of the cable exit hole are squeezed due to the interference fit, forming a double seal on the gap between the cable and the hole wall, preventing external media from penetrating from the cable exit point.

[0033] Furthermore, the support platform 11 at the bottom of the inner cavity of housing 1 has a height of 1 / 3 to 1 / 2 of the inner cavity depth. This supports the sensor and maintains a distance between it and the inner wall of the housing, reducing the risk of the sensor becoming contaminated with condensation or dust due to direct contact with the housing, thus enhancing the protective effect. Simultaneously, the selection of materials for the seals and the cable outlet seals—silicone rubber / nitrile rubber for temperature and moisture resistance, and fluororubber for chemical corrosion resistance—ensures that the sealing structure maintains its elasticity and sealing performance during long-term use, guaranteeing the stability of the overall dustproof and moisture-proof function.

[0034] In summary, the housing forms a multi-dimensional and collaborative protection system through the closed frame of the shell and cover, the compression seal at the joint, the interference seal at the cable outlet, and the auxiliary protection of the internal support, ultimately achieving effective dust and moisture protection for the internal weighing sensor.

[0035] Example 2

[0036] Reference Figure 4 This is the second embodiment of the present invention, implemented based on the first embodiment;

[0037] Specifically, it includes a quick-release device for the outgoing line seal, which is located on the inner wall of the housing 1 and on the side of the sealing element 3 facing the inner cavity of the housing. This device consists of 501, 502, 503, 504, and 505. It is used to quickly disassemble and install the outgoing line seal 4 without disassembling the housing 1 and the cover 2 or damaging the original sealing structure of the sealing element 3. It also works with the housing 1, the sealing element 3, and the outgoing line seal 4 to maintain the dustproof and moisture-proof sealing of the inner cavity of the housing. Among them, 501 is an annular positioning seat, 502 is an elastic block, 503 is an unlocking lever, 504 is a cavity, and 505 is a spring.

[0038] Furthermore, 504 is a cavity recessed into the inner wall of the housing 1. The opening position of 504 corresponds to the outlet hole on the housing 1, and the inner diameter of 504 is larger than the diameter of the outlet hole. The depth direction of 504 extends along the inner wall of the housing 1 away from the outlet hole. The inner wall of 504 is a smooth cylindrical surface. The annular positioning seat 501 is a rigid annular structure. 501 is coaxially fixed at the center position of the cavity bottom of 504. The axis of 501 is collinear with the axis of the outlet hole of the housing 1. The inner diameter of 501 is adapted to the outer diameter of the outlet sealing part 4. An installation gap is reserved between the outer peripheral surface of 501 and the inner wall of 504.

[0039] Furthermore, there are 3-4 elastic locking blocks 502, which are evenly distributed along the outer circumferential surface of 501; the outer circumferential surface of 501 is provided with strip-shaped mounting grooves corresponding to 502, one end of 502 is embedded in the strip-shaped mounting groove and rotatably connected to 501, and the other end of 502 extends towards the inner wall of 504. The inner side wall of the extended end of 502 (towards the axis of 501) is provided with an arc-shaped locking protrusion that matches the outer circumferential surface of the outlet sealing part 4; the middle of the outer circumferential surface of the outlet sealing part 4 is provided with an annular locking groove that matches the arc-shaped locking protrusion.

[0040] Furthermore, the number of springs 505 is the same as that of 502. One end of 505 is fixedly connected to the outer wall of the extension end of 502 (towards the inner wall of 504), and the other end of 505 is fixedly connected to the inner wall of 504. In its natural state, 505 is in a slightly compressed state, and the elastic force pushes the extension end of 502 toward the axis of 501, so that the arc-shaped convex part of 502 protrudes from the inner wall of 501.

[0041] Furthermore, the number of unlocking levers 503 is the same as that of 502. One end of 503 is fixedly connected to the outer wall of the extension end of 502, and the other end of 503 extends in a direction parallel to the axis of 504, passing through the guide hole opened in the side wall of 504 and the through hole opened in the side wall of housing 1 in sequence, and extending to the outside of housing 1. The guide hole of 503 and 504 and the through hole of housing 1 are all slidingly fitted, and a flexible sealing gasket is embedded between 503 and the through hole of housing 1. The inner ring of the flexible sealing gasket is tightly fitted to the outer peripheral surface of 503, and the outer ring is tightly fitted to the inner wall of the through hole of housing 1. An anti-slip piece is provided at the end of 503 extending to the outside of housing 1. The width of the anti-slip piece is 8mm-12mm.

[0042] In this process, one end of the cable outlet sealing part 4 is inserted along the axial direction of the cable outlet hole of the housing 1. The end of the cable outlet sealing part 4 first contacts the inner wall of the annular positioning seat 501 and extends deeper along its guide. When the annular groove of the cable outlet sealing part 4 moves to the arc-shaped protrusion of the elastic block 502, the outer circumferential surface of the cable outlet sealing part 4 presses against the arc-shaped protrusion, pushing 502 to swing outward around its rotational connection point with 501. At the same time, 502 drives the spring 505 to further compress. When the annular groove is completely aligned with the arc-shaped protrusion, the compression force of the spring 505 is released, pushing 502 to swing inward and reset, so that the arc-shaped protrusion is engaged in the annular groove, realizing the axial positioning of the cable outlet sealing part 4 and completing the installation. At this time, the cable outlet sealing part 4 and the cable outlet hole of the housing 1 maintain an interference seal.

[0043] When disassembly is required, move the anti-slip lever of unlocking lever 503 away from the axis of housing 1. 503 slides along the guide hole of 504 and the through hole of housing 1, simultaneously causing the extension end of 502 to swing outward. 502 compresses spring 505, causing the arc-shaped locking protrusion to disengage from the annular groove of the cable outlet seal 4. While maintaining the state of 503 being moved, pull the cable outlet seal 4 outward from housing 1 to pull it out of the cable outlet hole, completing the disassembly. After disassembly, release 503, and spring 505 will return to its initial position, pushing 502 and 503 back to their initial positions, ready for the next installation.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A weighing sensor housing with dustproof and moisture-proof functions, characterized in that, It includes a housing (1) for carrying a weighing sensor, a cover (2) that cooperates with the housing (1) to form a closed space, a seal (3) disposed at the junction of the housing (1) and the cover (2), and a wire exit seal (4) for sealing the outlet of the sensor cable; the housing (1) and the cover (2) enclose to form an inner cavity for accommodating the sensor, and the seal (3) and the wire exit seal (4) together block the communication path between the inner cavity and the external environment to achieve dustproof and moisture-proof functions.

2. The weighing sensor housing with dustproof and moisture-proof functions according to claim 1, characterized in that, The sealing element (3) is an annular structure with a circular or rectangular cross-section. The sealing element (3) is embedded in an annular groove on the end face of the housing (1) facing the cover (2). When the cover (2) and the housing (1) are fastened together, the sealing element (3) is squeezed and deformed to fill the gap between them.

3. The weighing sensor housing with dustproof and moisture-proof functions according to claim 1, characterized in that, The cover (2) is connected to the shell (1) by a buckle or bolt, and the edge of the cover (2) extends toward the shell (1) to form a flange (21). The flange (21) fits against the outer wall of the shell (1), and the seal (3) is located between the flange (21) and the mating surface of the shell (1).

4. The weighing sensor housing with dustproof and moisture-proof functions according to claim 1, characterized in that, The cable outlet sealing part (4) is a columnar structure made of elastic material. It has an axial through hole for the cable to pass through. The diameter of the through hole is smaller than the outer diameter of the cable. The outer diameter of the cable outlet sealing part (4) is interference-fitted with the diameter of the cable outlet hole on the housing (1). The interference amount is 0.1mm-0.5mm.

5. The weighing sensor housing with dustproof and moisture-proof functions according to claim 1, characterized in that, The bottom of the inner cavity of the housing (1) is provided with a support platform (11) that protrudes into the inner cavity. The height of the support platform (11) is 1 / 3 to 1 / 2 of the depth of the inner cavity of the housing (1), which is used to support the weighing sensor to avoid the sensor directly contacting the inner wall of the housing (1).

6. The weighing sensor housing with dustproof and moisture-proof functions according to claim 1, characterized in that, The material of the sealing element (3) is silicone rubber or nitrile rubber, the material of the outlet sealing part (4) is fluororubber, and the thickness of the sealing element (3) is 0.5mm-2mm, and its width is consistent with the width of the mating surface of the shell (1) and the cover (2).

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