High-protection weighing sensor

Abstract

The utility model relates to a high-protection weighing sensor which comprises a sensor body, an upper pressure head and a lower pressure head are arranged at the upper end and the lower end of the sensor body respectively, a sleeve is arranged on the outer side of the sensor body, the sleeve is of a cylindrical structure with a hole in the center and is inversely buckled on the upper portion of the sensor body, and an annular sealing plate is arranged at the lower end of the sleeve. The inner side and the outer side of the annular sealing plate are connected with the sensor body and the sleeve respectively, strip-shaped limiting grooves are formed in the upper pressing head and the lower pressing head, counter bores are formed in the limiting grooves, the upper pressing head and the lower pressing head are connected with the sensor body through the counter bores, and protruding parts matched with the limiting grooves and the counter bores are arranged at the two ends of the sensor body. The outer side of the sensor body is provided with the sleeve, and the lower end of the sleeve is provided with the annular sealing plate, so that the installation is convenient, the internal sensor body can be well sealed, the shape of the sleeve can prevent water drops from sliding into the lower pressure head, and the waterproof effect is achieved.

Description

Technical Field

[0001] This application relates to the technical field of weighing sensors, and particularly to a high-protection weighing sensor. Background Art

[0002] Currently, weighing sensors are widely used in various electronic weighing devices such as truck scales, rail scales, axle scales, and tank scales. Among them, the most widely used is the column-type sensor. The elastic body of the column-type weighing sensor generally has a structure of a single pure column or a shear column, and the weight is calculated through the deformation of the elastic body.

[0003] There are some weighing sensors in the prior art. For example, a Chinese patent with the authorization announcement number CN217155544U and the publication date of August 9, 2022, discloses a column-type weighing module, which includes a column-type sensor, an upper pressure head, and a base. A lower connecting plate is fixed to the lower end of the base, and an inverted U-shaped member for restricting the 360-degree swing amount of the column-type sensor in the front, rear, left, and right directions is fixed on the lower connecting plate. A square hole is opened at the center position of the upper end surface of the inverted U-shaped member, and a square block structure with four-sided trimmed edges that matches the square hole is formed at the upper end of the column-type sensor. The lower end of the column-type sensor is arranged on the base, and the upper end passes through the square hole of the inverted U-shaped member and abuts against the upper pressure head. A protective sealing ring is installed at the square hole of the inverted U-shaped member.

[0004] In the above application, anti-toppling and anti-overturning devices are provided in all directions to limit the horizontal lateral force and off-axis load in each direction on the module, effectively preventing the sensor from swinging too much and the weighing platform from overturning, and it can replace the existing double-shear beam sensor. Regarding the related technology above, the inventor believes that although this application uses an inverted U-shaped member to limit the movement of the sensor, it will expose the elastic body, unable to provide effective protection, which will affect the performance of the elastic body and the service life. Therefore, it is necessary to design a high-protection weighing sensor with good protection and a good limiting effect. Utility Model Content

[0005] This application provides a high-protection weighing sensor with good protection and a good limiting effect.

[0006] The high-protection weighing sensor provided by this application adopts the following technical solutions:

[0007] A high-protection weighing sensor includes a sensor body. An upper pressure head and a lower pressure head are respectively arranged at the upper and lower ends of the sensor body. A sleeve is arranged outside the sensor body. The sleeve is a cylindrical structure with a hole in the center and is buckled on the upper part of the sensor body. An annular sealing plate is arranged at the lower end of the sleeve. The inner and outer sides of the annular sealing plate are respectively connected to the sensor body and the sleeve. Strip-shaped limiting grooves are arranged on both the upper pressure head and the lower pressure head, and counterbores are arranged in the limiting grooves. The upper pressure head and the lower pressure head are connected to the sensor body through the counterbores. Convex parts matching the limiting grooves and the counterbores are arranged at both ends of the sensor body.

[0008] Preferably, holes are arranged on the side surface of the sleeve, and waterproof connectors are arranged in the holes. A sealing cylinder is arranged at the connection between the waterproof connector and the sleeve.

[0009] Preferably, the sensor body is of a cylindrical structure. Limiting parts are arranged at both the upper and lower parts of the sensor body. The side surfaces of the limiting parts are connected to the sleeve and the annular sealing plate. A horizontal groove is arranged in the middle of the sensor body, and strain gauges are arranged in the horizontal groove. The strain gauges are electrically connected to the waterproof connectors.

[0010] Preferably, an upward bend is arranged at the upper end of the sleeve, and the inner side of the upper end of the sleeve is connected to the limiting part. Downward bends are arranged on both the inner and outer sides of the annular sealing plate.

[0011] Preferably, the sleeve and the sensor body, the annular sealing plate and the sleeve, and the annular sealing plate and the sensor body are sealed and fixed by welding or bonding.

[0012] Preferably, a plurality of weight-reducing cut edges are evenly arranged circumferentially on the side surface of the sleeve, and the weight-reducing cut edges are tangent to the sleeve.

[0013] Preferably, mounting holes are arranged on both the upper pressure head and the lower pressure head. The mounting holes are located on the end faces of the upper pressure head and the lower pressure head close to each other, and the mounting holes are stepped holes.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. In the present application, by arranging a sleeve outside the sensor body and the outer diameter of the sleeve gradually decreases from top to bottom, and at the same time arranging an annular sealing plate at the lower end of the sleeve, it is convenient for installation and can play a good sealing effect on the internal sensor body, ensuring the stable detection of the sensor body. At the same time, the shape of the sleeve with a small upper part and a large lower part can prevent water droplets from slipping into the lower pressure head, achieving a waterproof effect; at the same time, limiting grooves and counterbores are arranged on both the upper pressure head and the lower pressure head, which is convenient for installation and can prevent the sensor body from rotating, facilitating use.

[0016] 2. By providing a sealing cylinder on the sleeve and connecting a waterproof joint through the sealing cylinder, the connection is tight, ensuring the detection accuracy; by providing a limiting portion on the sensor, the positions of the sleeve and the annular sealing plate can be restricted, facilitating installation.

[0017] 3. By providing an upward bend at the upper end of the sleeve and downward bends on both the inner and outer sides of the annular sealing plate, water droplets can be prevented from entering the interior of the sleeve, achieving a good waterproof effect; by providing mounting holes on the upper pressing head and the lower pressing head, it is convenient for installation and fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the high - protection weighing sensor in a preferred embodiment of the present application.

[0019] Figure 2 is a front view of the high - protection weighing sensor in a preferred embodiment of the present application.

[0020] Figure 3 is a sectional view of the high - protection weighing sensor in a preferred embodiment of the present application.

[0021] Figure 4 is an exploded view of the high - protection weighing sensor in a preferred embodiment of the present application.

[0022] Figure 5 is a schematic structural view of the sensor body in a preferred embodiment of the present application.

[0023] DESCRIPTION OF THE REFERENCE NUMERALS: 1, sensor body; 101, convex portion; 102, limiting portion; 2, upper pressing head; 3, lower pressing head; 4, sleeve; 401, weight - reducing cut - edge; 5, annular sealing plate; 6, limiting groove; 7, counterbore; 8, waterproof joint; 9, strain gauge; 10, mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the present application in detail with reference to the accompanying drawings.

[0025] The embodiment of the present application discloses a high - protection weighing sensor.

[0026] Refer to Figures 1 to 4, A high-protection weighing sensor, comprising a sensor body 1. An upper pressure head 2 and a lower pressure head 3 are respectively arranged at the upper and lower ends of the sensor body 1. A sleeve 4 is arranged outside the sensor body 1. The sleeve 4 is a cylindrical structure with a hole in the center and the sleeve 4 is buckled on the upper part of the sensor body 1. There are holes on the side of the sleeve 4 and a waterproof connector 8 is arranged in the holes. A sealing cylinder is arranged at the connection between the waterproof connector 8 and the sleeve 4; A circular sealing plate 5 is arranged at the lower end of the sleeve 4. The inner and outer sides of the circular sealing plate 5 are respectively connected to the sensor body 1 and the sleeve 4. A plurality of weight-reducing cut edges 401 are evenly arranged circumferentially on the side of the sleeve 4, and the weight-reducing cut edges 401 are tangent to the sleeve 4; Specifically, the upper end of the sleeve 4 is provided with an upward bend and the inner side of the upper end of the sleeve 4 is connected to the limiting part 102. The inner and outer sides of the circular sealing plate 5 are both provided with downward bends. The sleeve 4 and the sensor body 1, the circular sealing plate 5 and the sleeve 4, and the circular sealing plate 5 and the sensor body 1 are sealed and fixed by welding or bonding.

[0027] Refer to Figures 1 to 5 , Bar-shaped limiting grooves 6 are arranged on both the upper pressure head 2 and the lower pressure head 3, and counterbores 7 are arranged in the limiting grooves 6. The upper pressure head 2 and the lower pressure head 3 are connected to the sensor body 1 through the counterbores 7. Both ends of the sensor body 1 are provided with convex parts 101 that match the limiting grooves 6 and the counterbores 7. Specifically, the convex part 101 in this embodiment includes a first cylindrical convex part and a second cylindrical convex part. The two side edges of the first cylindrical convex part and the size of the side edges correspond to the size of the limiting groove 6. The second cylindrical convex part is located at the end of the first cylindrical convex part and the size of the second cylindrical convex part corresponds to the size of the counterbore 7. Mounting holes 10 are arranged on both the upper pressure head 2 and the lower pressure head 3. The mounting holes 10 are located on the end faces of the upper pressure head 2 and the lower pressure head 3 close to each other. The mounting holes 10 are stepped holes.

[0028] Refer to Figures 3 to 5 , The sensor body 1 is a cylindrical structure. Limiting parts 102 are arranged on both the upper and lower parts of the sensor body 1. The side surfaces of the limiting parts 102 are connected to the sleeve 4 and the circular sealing plate 5. A horizontal groove is arranged in the middle of the sensor body 1 and a strain gauge 9 is arranged in the horizontal groove. The strain gauge 9 is electrically connected to the waterproof connector 8.

[0029] The implementation principle is as follows: In this application, a sleeve 4 is arranged outside the sensor body 1 and the outer diameter of the sleeve 4 gradually decreases from top to bottom. At the same time, a circular sealing plate 5 is arranged at the lower end of the sleeve 4, which is convenient for installing and fixing the sensor body 1. At the same time, it can play a good sealing effect on the internal sensor body 1, ensure the stable detection of the sensor body 1, and the shape of the sleeve 4 that is small at the top and large at the bottom can prevent water droplets from slipping into the lower pressure head 3, playing a waterproof effect; At the same time, limiting grooves 6 and counterbores 7 are arranged on both the upper pressure head 2 and the lower pressure head 3, which is convenient for installation and can prevent the sensor body 1 from rotating, facilitating use.

[0030] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high protection weighing sensor, characterized in that: The sensor body (1) comprises a sensor body (1), wherein an upper pressure head (2) and a lower pressure head (3) are respectively arranged at the upper end and the lower end of the sensor body (1), a sleeve (4) is arranged on the outer side of the sensor body (1), the sleeve (4) is a cylindrical structure with a hole in the center and the sleeve (4) is buckled on the upper part of the sensor body (1), an annular sealing plate (5) is arranged at the lower end of the sleeve (4), the inner and outer sides of the annular sealing plate (5) are respectively connected to the sensor body (1) and the sleeve (4), the upper pressure head (2) and the lower pressure head (3) are both provided with a strip-shaped limiting groove (6) and a countersunk hole (7) is arranged in the limiting groove (6), the upper pressure head (2) and the lower pressure head (3) are connected to the sensor body (1) through the countersunk hole (7), and the two ends of the sensor body (1) are provided with convex parts (101) matching the limiting groove (6) and the countersunk hole (7).

2. A high protection weighing sensor according to claim 1, characterized in that: The side of the sleeve (4) is provided with a hole and a waterproof joint (8) is provided in the hole; a sealing cylinder is provided at the connection between the waterproof joint (8) and the sleeve (4).

3. A high protection weighing sensor according to claim 2, characterized in that: The sensor body (1) is a cylindrical structure. The upper and lower parts of the sensor body (1) are both provided with limiting parts (102). The side surfaces of the limiting parts (102) are connected to the sleeve (4) and the annular sealing plate (5). A horizontal groove is provided in the middle of the sensor body (1) and a strain gauge (9) is provided in the horizontal groove. The strain gauge (9) is electrically connected to the waterproof connector (8).

4. A high protection weighing sensor according to claim 3, characterized in that: The upper end of the sleeve (4) is provided with an upward bend and the inner side of the upper end of the sleeve (4) is connected to the limiting portion (102), and the inner and outer sides of the annular sealing plate (5) are both provided with downward bends.

5. A high protection weighing sensor according to claim 4, characterized in that: The sleeve (4) and the sensor body (1), the annular sealing plate (5) and the sleeve (4), and the annular sealing plate (5) and the sensor body (1) are welded or bonded to achieve sealing and fixing.

6. A high protection weighing sensor according to claim 1, characterized in that: A plurality of weight-reducing cutting edges (401) are evenly arranged in the circumferential direction on the side surface of the sleeve (4), and the weight-reducing cutting edges (401) are tangent to the sleeve (4).

7. A high protection weighing sensor according to claim 1, characterized in that: The upper pressing head (2) and the lower pressing head (3) are both provided with a mounting hole (10), the mounting hole (10) is located on a side end surface of the upper pressing head (2) and the lower pressing head (3) close to each other, and the mounting hole (10) is a stepped hole.

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