Sealing protection structure of weighing sensor

Abstract

The utility model discloses a sealing protection structure of a weighing sensor, which comprises a sensor, the sensor comprises an elastic body and a strain gauge arranged on the elastic body, an inner container is arranged outside the middle part of the elastic body, a glue injection hole is arranged on the inner container, an outer protection shell is arranged outside the inner container, and the outer protection shell is connected with the elastic body. The upper bearing end and the lower fixing end of the elastic body are both exposed out of the outer protective shell, and sealant is filled between the elastic body and the inner container. The sealing structure has the advantages that the structure is simple and reasonable, the inner container is arranged, the glue injection hole is formed in the inner container, and the containing cavity for containing the sealing glue is formed in the inner container, so that the sealing glue can better wrap the sensor, and the sealing protection effect is improved; in addition, the outer protective shell is arranged outside the inner container, so that a double-shell protective structure is formed, and protectiveness is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing sensor manufacturing, and specifically relates to a sealing protection structure for a weighing sensor. Background Art

[0002] At present, weighing sensors are widely used in various electronic weighing devices such as truck scales, rail scales, axle scales, and tank scales. They have the advantages of stable and reliable performance, excellent dynamic response performance, and strong adaptability. Some electronic weighing devices are used outdoors, which causes the weighing sensors to be easily eroded by rain, dust, etc. Rain and dust will reduce the accuracy and service life of the weighing sensors. Therefore, a sealing protection structure is generally provided outside the existing weighing sensors.

[0003] At present, the following two sealing protection processes are commonly used for weighing sensors: one is laser and argon arc welding; the other is glue bonding. Among them, the laser and argon arc welding sealing protection process has technical problems such as complex operation, high process requirements, and complex production. Moreover, there are special requirements for materials and the cost is relatively high. For the glue bonding sealing protection process, the process is simple, but the biggest defect is that the sealing protection effect on the sensor is not very good, and the stability is not ideal. After long-term use, the quality of the glue seal will decline, resulting in a decrease in the product's sealing level and seriously affecting the product's performance. Summary of the Utility Model

[0004] The purpose of the utility model is to make up for the above deficiencies and disclose to the society a sealing protection structure for a weighing sensor with reasonable structure, convenient processing, and good sealing effect.

[0005] The technical solution of the utility model is realized as follows:

[0006] A sealing protection structure for a weighing sensor includes a sensor. The sensor includes an elastic body and a strain gauge located on the elastic body. An inner container is arranged outside the middle part of the elastic body. A glue injection hole is arranged on the inner container. An outer protective shell is arranged outside the inner container. The upper bearing end and the lower fixed end of the elastic body both protrude outside the outer protective shell. A sealing glue is filled between the elastic body and the inner container.

[0007] The measures to further optimize the technical solution are as follows:

[0008] As an improvement, a plug cover is configured on the glue injection hole. The setting of the plug cover can form a closed space for the inner container and enable the sealing glue to solidify better to form a sealing layer.

[0009] As an improvement, the inner container is formed by fitting and fixing a first inner container body and a second inner container body.

[0010] As an improvement, positioning holes are provided on the first inner container body, and positioning bumps adapted to the positioning holes are provided at corresponding positions on the second inner container body. Through the cooperation of the positioning holes and the positioning bumps, positioning is carried out so that the first inner container body and the second inner container body can be accurately aligned.

[0011] As an improvement, a sealing groove is provided on the first inner container body, and a rib adapted to the sealing groove is provided on the second inner container body. Through the cooperation of the sealing groove and the rib, the sealing performance of the mating surface is improved.

[0012] As an improvement, an annular groove is provided on the outer wall of the inner container, and a rib adapted to the annular groove is provided on the inner wall of the outer protective shell. With such a setting, the bonding force between the outer protective shell and the inner container can be improved.

[0013] As an improvement, an inner convex portion protrudes inward from the inner surface of the inner container. The setting of the inner convex portion can increase the surface area of the inner container and improve the bonding force between the sealant and the inner container.

[0014] As an improvement, an upward flanging is formed by the inward extension of the upper end of the outer protective shell, and a downward flanging is formed by the inward extension of the lower end of the outer protective shell.

[0015] As an improvement, the outer protective shell is an integrally injection-molded structure.

[0016] The advantages of the present utility model compared with the prior art are:

[0017] The sealing and protection structure of a weighing sensor of the present utility model is simple and reasonable. By providing an inner container and a glue injection hole on the inner container, a cavity for accommodating sealant is formed inside the inner container, so that the sealant can better wrap the sensor to improve the sealing and protection effect; in addition, an outer protective shell is provided outside the inner container, thus forming a double-shell protection structure to further improve the protection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structure diagram of Embodiment 1 of the present utility model;

[0019] Figure 2 is an exploded schematic diagram of Embodiment 1 of the present utility model;

[0020] Figure 3 is Figure 2 the exploded schematic diagram of the inner container in ;

[0021] Figure 4 is Figure 2 the exploded schematic diagram of the inner container from another perspective in ;

[0022] Figure 5 is Figure 2 the cross-sectional structure diagram of the outer protective shell in ;

[0023] Figure 6 is the three-dimensional structure diagram of the second embodiment of the present utility model;

[0024] Figure 7 is the exploded schematic diagram of the second embodiment of the present utility model;

[0025] Figure 8 is the cross-sectional schematic diagram of the second embodiment of the present utility model;

[0026] Figure 9 is Figure 7 the cross-sectional structure diagram of the inner liner in

[0027] The names of the reference numerals in the drawings of the present utility model are as follows:

[0028] Elastomer 1, upper bearing end 11, lower fixing end 12, inner liner 2, glue injection hole 2a, annular groove 2b, inner convex portion 2c, first inner liner body 21, positioning hole 21a, sealing groove 21b, second inner liner body 22, positioning convex block 22a, rib 22b, outer protective shell 3, rib 3a, upper flanging 31, lower flanging 32, plug cover 4. Detailed implementation manners

[0029] The present utility model will be further described in detail below with reference to the drawings:

[0030] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description of the present utility model can be used in other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0031] Those skilled in the art should understand that in the disclosure of the present utility model, the orientations or positions indicated by the terms "longitudinal", "lateral", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or position relationships shown in the drawings. It is only for the convenience of simplifying the description of the present utility model and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0032] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, and in other embodiments, the number of the element can be multiple. The term "one" should not be construed as a limitation on the number.

[0033] Embodiment 1, as Figures 1 to 5 shown, a sealing and protecting structure of a weighing sensor, including a sensor, the sensor includes an elastomer 1 and a strain gauge located on the elastomer, an inner container 2 is arranged outside the middle of the elastomer 1, a glue injection hole 2a is arranged on the inner container 2, an outer protective shell 3 is arranged outside the inner container 2, the upper bearing end 11 and the lower fixed end 12 of the elastomer 1 are both exposed outside the outer protective shell 3, and a sealing glue is filled between the elastomer 1 and the inner container 2.

[0034] The sensor is a prior art, and its structure and working principle will not be specifically elaborated here.

[0035] A plug cover 4 is arranged on the glue injection hole 2a.

[0036] In the sealing and protecting structure of the present utility model, through the setting of the inner container 2, a cavity for injecting the sealing glue is formed inside the inner container 2. The sealing glue is in a liquid state when injected and becomes gel-like after solidification. The injected sealing glue wraps the sensor, thereby sealing and protecting the sensor. Setting the plug cover 4 can improve the sealing performance of the inner container 2. After injecting the sealing glue, the plug cover 4 is plugged on.

[0037] The inner container 2 is formed by fitting and fixing a first inner container body 21 and a second inner container body 22.

[0038] A positioning hole 21a is arranged on the first inner container body 21, and a positioning convex block 22a adapted to the positioning hole 21a is arranged at the corresponding position on the second inner container body 22.

[0039] A sealing groove 21b is arranged on the first inner container body 21, and a rib 22b adapted to the sealing groove 21b is arranged on the second inner container body 22.

[0040] In this embodiment, the cross-section of the inner container 2 is a circular structure. During installation, positioning is achieved by the cooperation of the positioning hole 21a and the positioning convex block 22a, so that the first inner container body 21 and the second inner container body 22 can be accurately aligned when they are fitted together. After fitting, the rib 22b enters the corresponding sealing groove 21b. Through the cooperation of the sealing groove 21b and the rib 22b, the sealing performance of the mating surface is ensured. After the first inner container body 21 and the second inner container body 22 are fitted together, they are fixed by bolts.

[0041] An annular groove 2b is arranged on the outer wall of the inner container 2, and a rib 3a adapted to the annular groove 2b is arranged on the inner wall of the outer protective shell 3.

[0042] The inner surface of the inner container 2 is convexly provided with an inner convex part 2c. The setting of the inner convex part 2c can increase the surface area of the inner container 2 and improve the bonding force between the sealing glue and the inner container 2.

[0043] The upper end of the outer protective shell 3 extends inwards to form an upper flanging 31, and the lower end of the outer protective shell 3 extends inwards to form a lower flanging 32.

[0044] The outer protective shell 3 is an integrally injection-molded structure.

[0045] In addition, the sealing and protecting structure of the present utility model adopts a double-layer protecting structure, that is, an outer protective shell 3 is further arranged outside the inner tank 2. The outer protective shell 3 is injection-molded. The upper end and the lower end of the outer protective shell 3 respectively form an upper flanging 31 and a lower flanging 32. The outer protective shell 3 wraps the inner tank 2 and can protect the inner tank 2 and the sensor inside. The cooperation of the annular groove 2b and the rib 3a can improve the bonding force between the outer protective shell 3 and the inner tank 2, thereby improving the protection performance.

[0046] Embodiment 2, as Figures 6 to 9 shown, the sealing and protecting structure of the weighing sensor in this embodiment is similar to that in Embodiment 1. The difference is that in this embodiment, the cross-sections of the inner tank 2 and the outer protective shell 3 are rectangular structures. Both the circular sensor and the rectangular sensor are common sensor types on the market.

[0047] The sealing and protecting structure of the present utility model is not only applicable to the above-mentioned circular sensor and rectangular sensor, but also applicable to other types of sensors. It uses the inner tank 2 to form a cavity for accommodating the sealant, so that the sealant can more effectively coat the sensor, and an outer protective shell 3 is arranged outside the inner tank 2 to form a double-layer protecting structure, thereby improving the protection performance.

[0048] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be able to realize that all the equivalent replacements and obvious changes made by using the description and drawings of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A sealing protection structure of a weighing sensor, comprising a sensor, wherein the sensor comprises an elastic body (1) and a strain gauge located on the elastic body, wherein: An inner liner (2) is arranged outside the middle of the elastomer (1), a glue injection hole (2a) is arranged on the inner liner (2), an outer protective shell (3) is arranged outside the inner liner (2), an upper bearing end (11) and a lower fixed end (12) of the elastomer (1) are both exposed outside the outer protective shell (3), and a sealant is filled between the elastomer (1) and the inner liner (2).

2. The sealing protection structure of a weighing sensor according to claim 1 is characterized in that: The glue injection hole (2a) is provided with a plug cover (4).

3. The sealing protection structure of a weighing sensor according to claim 2 is characterized in that: The inner liner (2) is formed by a first inner liner body (21) and a second inner liner body (22) being coupled and fixed.

4. The sealing protection structure of a weighing sensor according to claim 3 is characterized in that: The first inner liner (21) is provided with a positioning hole (21a), and a positioning protrusion (22a) adapted to the positioning hole (21a) is provided at a corresponding position on the second inner liner (22).

5. The sealing protection structure of a weighing sensor according to claim 4 is characterized in that: The first inner liner body (21) is provided with a sealing groove (21b), and the second inner liner body (22) is provided with a convex rib (22b) which is controlled by the sealing groove (21b).

6. The sealing protection structure of a weighing sensor according to claim 5 is characterized in that: An annular groove (2b) is provided on the outer wall of the inner container (2), and a convex strip (3a) matching the annular groove (2b) is provided on the inner wall of the outer protective shell (3).

7. The sealing protection structure of a weighing sensor according to claim 6 is characterized in that: The inner surface of the inner container (2) is provided with an inwardly protruding portion (2c).

8. The sealing protection structure of a weighing sensor according to claim 7, characterized in that: The upper end of the outer protective shell (3) extends inwardly to form an upper flange (31), and the lower end of the outer protective shell (3) extends inwardly to form a lower flange (32).

9. The sealing protection structure of a weighing sensor according to claim 8, characterized in that: The outer protective shell (3) is an integral structure formed by injection molding.

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