A waterproof sealing structure of a load cell

Abstract

The utility model discloses a waterproof sealing structure of weighing sensor belongs to weighing sensor technical field, including weighing sensor body, the outer surface of weighing sensor body is connected with dismounting mechanism, the inboard surface fixedly connected with sealing mechanism of dismounting mechanism, the dismounting mechanism includes the sealing washer that is in accord with the outer surface of weighing sensor body, the outer surface of sealing washer is in accord with upper installation frame and lower installation frame, the outer surface screw thread connection of upper installation frame has bolt, the waterproof sealing structure of weighing sensor, through the diagonal fastening and separation design of bolt, nut, combine the clamping structure of sealing washer limit protruding and frame first recess, realize quick assembly and disassembly, can make sealing washer accurate deformation through even pressure when installing, guarantee initial assembly stability, only need to loosen bolt when replacing component can separate frame, need not complex tool, improve maintenance efficiency greatly, reduce operation difficulty.

Description

Technical Field

[0001] This utility model relates to the field of weighing sensor technology, specifically a waterproof sealing structure for a weighing sensor. Background Technology

[0002] A load cell is essentially a device that converts a mass signal into a measurable electrical signal output. When using a load cell, the actual working environment of the load cell should be considered first. This is crucial for the correct selection of a load cell, as it relates to whether the load cell can work properly, its safety and lifespan, and even the reliability and safety of the entire weighing instrument.

[0003] Chinese utility model patent CN220304656U discloses a waterproof sealing structure for a weighing sensor, including a sensor body with mounting holes at both ends. The key feature is that two connecting rings are fixedly arranged on the sensor body between the two mounting holes at a distance, and a waterproof sleeve for wrapping the sensor body is connected between the two connecting rings. The two connecting rings cooperate with the waterproof sleeve to form a partial waterproof structure in the middle section of the sensor body, effectively preventing inadequate waterproofing due to deformation of the sealing rings, thus avoiding leakage at the mounting holes. Furthermore, the connecting rings and the sensor body are connected by adhesive, eliminating the need for mechanical components. As long as the adhesive is applied properly during production, the overall waterproofing of this application will be long-lasting.

[0004] The existing sealing sleeve and connecting ring are fixed by an adhesive application process. After the adhesive cures, a rigid connection is formed. When the waterproof sleeve needs to be replaced due to aging or damage after long-term use, it must be peeled off by force or the adhesive must be dissolved by chemical solvents. This is not only cumbersome, but may also scratch the surface of the sensor body and damage its structural integrity. Therefore, it is inconvenient to replace the waterproof sleeve.

[0005] To address this issue, the present invention provides a waterproof sealing structure for a weighing sensor. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a waterproof sealing structure for a weighing sensor, thus solving the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a waterproof sealing structure for a weighing sensor, comprising a weighing sensor body, a disassembly and assembly mechanism attached to the outer surface of the weighing sensor body, a sealing mechanism fixedly connected to the inner side of the disassembly and assembly mechanism, the disassembly and assembly mechanism including a sealing gasket attached to the outer surface of the weighing sensor body, an upper mounting frame and a lower mounting frame attached to the outer surface of the sealing gasket, a bolt threadedly connected to the outer surface of the upper mounting frame, one end of the bolt passing through the outer surfaces of the upper mounting frame and the lower mounting frame and threadedly connected to a nut, and the sealing mechanism including a second limiting protrusion fixedly connected to the inner side of the upper mounting frame and the lower mounting frame, and a connecting frame sleeved on the outer surface of the second limiting protrusion.

[0008] Furthermore, the inner sides of both the upper mounting frame and the lower mounting frame are provided with a first groove, and the sealing gasket is provided with a limiting protrusion that cooperates with the inner wall of the first groove. The limiting protrusion is engaged with the inner side of the first groove.

[0009] By adopting the above technical solution, the limiting protrusion and groove structure can force the sealing gasket to expand to both sides of the groove when the bolt is pressed, thereby enhancing the tightness of the sealing gasket and the frame.

[0010] Furthermore, the inner surfaces of both the upper and lower mounting frames are fixedly connected with first limiting protrusions, and the outer surface of the first limiting protrusions is in contact with the outer surface of the sealing gasket.

[0011] By adopting the above technical solution, the first limiting protrusion can form a circumferential compression on the sealing gasket, causing the sealing gasket to bulge towards the surface of the sensor body, thereby enhancing the adhesion between the sealing gasket and the sensor.

[0012] Furthermore, both the upper mounting frame and the lower mounting frame have fixed protrusions fixedly connected to their outer surfaces, and the outer surfaces of the fixed protrusions are in contact with the outer surface of the sealing gasket.

[0013] Using the above technical solution, the fixed protrusion can guide the sealing gasket to be squeezed towards the edge, causing the edge of the sealing gasket to deform more, filling the gap at the frame splice and preventing water from seeping in from the edge.

[0014] Furthermore, a control panel is fixedly connected to the outer surface of the base, and two sets of sealing gaskets are provided. The two sets of sealing gaskets are respectively snapped into the inner sides of the lower mounting frame and the upper mounting frame, and the outer surfaces of the two sets of sealing gaskets are in contact with each other.

[0015] By adopting the above technical solution, two sets of sealing gaskets are respectively snapped into the upper and lower mounting frames. When they are attached, the pressure of the mounting frames can generate mutual compression deformation, making the contact surface tighter and further enhancing the waterproof effect brought about by the extended path. Reliable sealing can be achieved without relying on sealant.

[0016] Furthermore, a waterproof sleeve is fixedly connected to the outer surface of the connecting frame. The waterproof sleeve is disposed on the outer surface of the weighing sensor body, and a gap is left between the inner side of the waterproof sleeve and the outer surface of the weighing sensor body. A second groove is provided on the connecting frame corresponding to the position of the second limiting protrusion, and the inner side of the second groove is in contact with the outer surface of the second limiting protrusion.

[0017] By adopting the above technical solution, the second groove and the second limiting protrusion are closely fitted to facilitate the limiting of the connecting frame and prevent the connecting frame and the outer surface of the weighing sensor body from separating.

[0018] Beneficial effects

[0019] This invention provides a waterproof sealing structure for a weighing sensor. Compared with the prior art, it has the following advantages:

[0020] 1. The waterproof sealing structure of this weighing sensor, through the diagonal fastening and separation design of bolts and nuts, combined with the snap-fit ​​structure of the sealing gasket limiting protrusion and the first groove of the frame, enables quick installation and removal. During installation, the sealing gasket can be precisely deformed by uniform pressure to ensure the stability of the initial assembly. When replacing parts, the frame can be separated simply by loosening the bolts, without the need for complicated tools, which greatly improves maintenance efficiency and reduces the difficulty of operation.

[0021] 2. The waterproof sealing structure of this weighing sensor utilizes the mutual compression of multiple sets of sealing gaskets and the tight fit between the grooves and protrusions. The first limiting protrusion causes the sealing gasket to adhere to the sensor, and the fixing protrusion fills the gaps in the frame. In conjunction with the limiting of the connecting frame and the second limiting protrusion, the seepage path is extended, achieving reliable waterproofing without the need for sealant and ensuring the stable operation of the sensor in humid environments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the external structure of this utility model;

[0024] Figure 2 This is a front sectional view of the structure of this utility model;

[0025] Figure 3 yes Figure 2 A magnified structural diagram of A in the middle;

[0026] Figure 4 This is an exploded structural diagram of the upper mounting frame and the lower mounting frame in this utility model.

[0027] In the diagram: 1. Weighing sensor body; 2. Disassembly and assembly mechanism; 201. Bolt; 202. Lower mounting frame; 203. Nut; 204. Upper mounting frame; 205. First groove; 206. Sealing gasket; 207. First limiting protrusion; 208. Fixing protrusion; 3. Sealing mechanism; 301. Waterproof sleeve; 302. Connecting frame; 303. Second groove; 304. Second limiting protrusion. Detailed Implementation

[0028] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," 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 application 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 application. 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 direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0029] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Reference Figures 1 to 4 This application provides a waterproof sealing structure for a weighing sensor, including a weighing sensor body 1. A disassembly and assembly mechanism 2 is attached to the outer surface of the weighing sensor body 1. A sealing mechanism 3 is fixedly connected to the inner side of the disassembly and assembly mechanism 2. The disassembly and assembly mechanism 2 includes a sealing gasket 206 attached to the outer surface of the weighing sensor body 1. An upper mounting frame 204 and a lower mounting frame 202 are attached to the outer surface of the sealing gasket 206. A bolt 201 is threadedly connected to the outer surface of the upper mounting frame 204. One end of the bolt 201 passes through the outer surfaces of the upper mounting frame 204 and the lower mounting frame 202 and is threadedly connected to a nut 203. The sealing mechanism 3 includes a second limiting protrusion 304 fixedly connected to the inner side of the upper mounting frame 204 and the lower mounting frame 202. A connecting frame 302 is sleeved on the outer surface of the second limiting protrusion 304.

[0031] Furthermore, the inner surfaces of the upper mounting frame 204 and the lower mounting frame 202 are each provided with a first groove 205. The sealing gasket 206 is provided with a limiting protrusion that cooperates with the inner wall of the first groove 205. The limiting protrusion is engaged with the inner surface of the first groove 205. The sealing gasket 206 is made of high-elasticity nitrile rubber, which can produce uniform deformation through compression. The inner surfaces of the upper mounting frame 204 and the lower mounting frame 202 are each fixedly connected with a first limiting protrusion 207. The outer surface of the first limiting protrusion 207 is in contact with the outer surface of the sealing gasket 206. The outer surfaces of the upper mounting frame 204 and the lower mounting frame 202 are each fixedly connected with a fixing protrusion 208. The outer surfaces of the fixing protrusion 208 are in contact with the outer surface of the sealing gasket 206.

[0032] In this embodiment, the diagonal fastening and separation design of bolts 201 and nuts 203, combined with the snap-fit ​​structure of the limiting protrusion of the sealing gasket 206 and the first groove 205 of the frame, enables quick assembly and disassembly. During installation, the sealing gasket 206 can be precisely deformed by uniform pressure, ensuring the stability of the initial assembly. When replacing parts, the frame can be separated simply by loosening bolts 201, without the need for complicated tools, which greatly improves maintenance efficiency and reduces the difficulty of operation.

[0033] Reference Figures 1 to 4 In one aspect of this embodiment, two sets of sealing gaskets 206 are provided, and the two sets of sealing gaskets 206 are respectively snapped onto the inner sides of the lower mounting frame 202 and the upper mounting frame 204, and the outer surfaces of the two sets of sealing gaskets 206 are in contact.

[0034] Furthermore, a waterproof sleeve 301 is fixedly connected to the outer surface of the connecting frame 302. The waterproof sleeve 301 is fitted onto the outer surface of the weighing sensor body 1, and there is a gap between the inner side of the waterproof sleeve 301 and the outer surface of the weighing sensor body 1. A second groove 303 is provided on the connecting frame 302 at the position corresponding to the second limiting protrusion 304. The inner side of the second groove 303 is in contact with the outer surface of the second limiting protrusion 304.

[0035] In this embodiment, by means of the mutual compression of multiple sets of sealing gaskets 206 and the tight fit of the grooves and protrusions, the first limiting protrusion 207 causes the sealing gasket 206 to fit the sensor, the fixing protrusion 208 fills the frame gap, and in conjunction with the limiting of the connecting frame 302 and the second limiting protrusion 304, the water seepage path is extended, and reliable waterproofing can be achieved without sealant, ensuring the stable operation of the sensor in a humid environment.

[0036] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0037] Working principle: First, clean the outer surface of the load cell body 1 to ensure it is free of oil and dust. Next, place the waterproof sleeve 301 over the waterproof area of ​​the load cell body 1. Then, align the limiting protrusion of the first set of sealing gaskets 206 with the first groove 205 of the lower mounting frame 202, and press to ensure the protrusion is fully engaged in the groove, ensuring that the outer surface of the sealing gasket 206 initially adheres to the first limiting protrusion 207 and fixing protrusion 208 of the lower mounting frame 202. Then, attach the lower mounting frame 202 along with the sealing gasket 206 to the lower half of the load cell body 1, ensuring the inner surface of the sealing gasket 206 is in close contact with the sensor body. Take the second set of sealing gaskets 206 and engage them in the first groove 205 of the upper mounting frame 204 in the same manner. Finally, fasten the upper mounting frame 204 to the load cell body. For the upper half of the sensor body, ensure that the outer surfaces of the two sets of sealing gaskets 206 are completely in contact. At the same time, the second limiting protrusion 304 and the second groove 303 engage, so that the second limiting protrusion 304 presses against the second groove 303. Then, insert the bolt 201 into the bolt holes evenly distributed along the edge of the upper mounting frame 204, pass through the corresponding hole of the lower mounting frame 202, and screw in the nut 203. Tighten the nut 203 gradually in a diagonal sequence. The pressure from the bolt 201 causes the upper mounting frame 204 and the lower mounting frame 202 to generate a uniform compressive force on the sealing gasket 206. Observe that the sealing gasket 206 expands to both sides of the first groove 205 due to the pressure and protrudes towards the surface of the sensor body until the contact surfaces of the two sets of sealing gaskets 206 are completely compacted and the frame is not loose, thus completing the initial installation.

[0038] When replacing the waterproof sleeve 301, rotate the bolt 201 and loosen the nut 203 in a diagonal sequence to separate the upper mounting frame 204 from the lower mounting frame 202. Take the new waterproof sleeve 301 and put it on the waterproof area of ​​the weighing sensor body 1. Then align the second groove 303 of the new connecting frame 302 with the second limiting protrusion 304 of the upper mounting frame 204 and the lower mounting frame 202. Finally, use the bolt 201 and nut 203 to fix it, thus completing the replacement of the waterproof sleeve 301.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof sealing structure for a weighing sensor, comprising a weighing sensor body (1), characterized in that: The outer surface of the weighing sensor body (1) is fitted with a disassembly and assembly mechanism (2), and the inner side of the disassembly and assembly mechanism (2) is fixedly connected with a sealing mechanism (3). The disassembly and assembly mechanism (2) includes a sealing gasket (206) fitted to the outer surface of the weighing sensor body (1). The outer surface of the sealing gasket (206) is fitted with an upper mounting frame (204) and a lower mounting frame (202). The outer surface of the upper mounting frame (204) is threaded with a bolt (201). One end of the bolt (201) passes through the outer surfaces of the upper mounting frame (204) and the lower mounting frame (202) and is threaded with a nut (203). The sealing mechanism (3) includes a second limiting protrusion (304) fixedly connected to the inner side of the upper mounting frame (204) and the lower mounting frame (202). The outer surface of the second limiting protrusion (304) is fitted with a connecting frame (302).

2. The waterproof sealing structure of a weighing sensor according to claim 1, characterized in that: The inner sides of the upper mounting frame (204) and the lower mounting frame (202) are provided with a first groove (205). The sealing gasket (206) is provided with a limiting protrusion in cooperation with the inner wall of the first groove (205). The limiting protrusion is engaged with the inner side of the first groove (205).

3. The waterproof sealing structure of a weighing sensor according to claim 2, characterized in that: The inner sides of both the upper mounting frame (204) and the lower mounting frame (202) are fixedly connected with a first limiting protrusion (207), and the outer surface of the first limiting protrusion (207) is in contact with the outer surface of the sealing gasket (206).

4. The waterproof sealing structure of a weighing sensor according to claim 3, characterized in that: The outer surfaces of the upper mounting frame (204) and the lower mounting frame (202) are both fixedly connected with fixing protrusions (208), and the outer surfaces of the fixing protrusions (208) are in contact with the outer surfaces of the sealing gasket (206).

5. The waterproof sealing structure of a weighing sensor according to claim 2, characterized in that: The sealing gasket (206) is provided in two sets. The two sets of sealing gaskets (206) are respectively snapped onto the inner side of the lower mounting frame (202) and the upper mounting frame (204), and the outer surfaces of the two sets of sealing gaskets (206) are in contact.

6. The waterproof sealing structure of a weighing sensor according to claim 5, characterized in that: A waterproof sleeve (301) is fixedly connected to the outer surface of the connecting frame (302). The waterproof sleeve (301) is fitted onto the outer surface of the weighing sensor body (1), and there is a gap between the inner side of the waterproof sleeve (301) and the outer surface of the weighing sensor body (1). The connecting frame (302) has a second groove (303) at the position corresponding to the second limiting protrusion (304). The inner side of the second groove (303) is in contact with the outer surface of the second limiting protrusion (304).

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