Integrated vulcanized sealing protection structure for weighing sensor

Abstract

An integrated vulcanized sealing protection structure for a weighing sensor comprises a sensor and a protection cover, the sensor comprises an elastic body and a strain gauge located on the elastic body, and the integrated vulcanized sealing protection structure is characterized in that the protection cover is of a hollow structure which is matched with the elastic body in size and provided with an upper opening and a lower opening, and the protection cover is an integrated vulcanized protection cover; the elastic body is arranged in the protective cover in a penetrating mode, the upper bearing end and the lower fixing end of the elastic body are both exposed out of the protective cover, and the protective cover is arranged outside the elastic body in a sleeving mode in an integrated vulcanization forming mode and fixed to the elastic body in a sealed mode. The sealing device is simple and reasonable in structure, convenient to process and low in cost, can seal and protect the sensor in all directions, has the characteristics of good sealing performance and long-term stability, is impact-resistant, and improves the aesthetic degree.

Description

Technical Field

[0001] The utility model relates to a weighing device, in particular to an integrated vulcanized sealing protection structure for a weighing sensor, which is suitable for electronic weighing equipment such as electronic truck scales, track scales, and material tank scales. Background Art

[0002] At present, weighing sensors are widely used in various electronic weighing equipment such as truck scales, track scales, axle weight scales, tank scales, etc. They have the advantages of stable and reliable performance, excellent dynamic response performance, and strong adaptability. Since many weighing sensors are installed outdoors, they are easily eroded by rain, dust, etc., so they have high requirements for sealing protection.

[0003] At present, there are two commonly used sealing protection processes 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 processes have technical problems such as complex operation, high process requirements, and complex production. They also have special requirements for materials and are costly. The glue bonding sealing protection process is simple, but the biggest defect is that the sealing protection effect of 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 decline in the product's sealing level, which seriously affects the product performance. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an integrated vulcanized sealing protection structure for a weighing sensor with a simple and reasonable structure and good sealing effect in view of the above technical status quo.

[0005] The first technical solution adopted by the utility model to solve the above-mentioned technical problems is: an integrated vulcanized sealed protection structure for a weighing sensor, including a sensor and a protective cover, the sensor including an elastomer and a strain gauge located on the elastomer, characterized in that: the protective cover is a hollow structure with upper and lower openings that match the size of the elastomer, the protective cover is an integrated vulcanized protective cover, the elastomer is arranged through the protective cover, the upper load-bearing end and the lower fixed end of the elastomer are exposed outside the protective cover, and the protective cover is sleeved outside the elastomer by an integrated vulcanization molding method and is sealed and fixed to the elastomer.

[0006] As an improvement, the protective cover includes an integrated vulcanized silicone shell, the integrated vulcanized silicone shell is covered with an outer cover shell, the outer cover shell is made of metal or non-metal material, the outer cover shell is attached to the outer surface of the integrated vulcanized silicone shell and is fixed together through integrated vulcanization molding by a molding mold.

[0007] Finally, a circle of grooves is provided at the lower end of the upper load-bearing end and the upper end of the lower fixed end of the elastomer along the outer wall. The upper and lower openings of the protective cover are reduced diameter openings corresponding to the grooves. The elastomer is arranged through the protective cover, the lower opening of the protective cover cooperates with the upper groove of the lower fixed end, and the upper opening cooperates with the lower groove of the upper load-bearing end, and an integrated protective sealing structure is formed through an integrated vulcanization process.

[0008] Compared with the prior art, the advantages of the utility model are: the protective cover adopts an integral vulcanized silicone, and an outer cover shell is provided, the elastomer is provided inside the protective cover, the upper bearing end and the lower fixed end are both exposed outside the protective cover, the protective cover is 360° wrapped around the elastomer by an integral vulcanized molding method, and is sealed and fixed with the elastomer. The utility model has a simple and reasonable structure, is easy to process, and has a low cost. It can provide all-round sealing protection for the sensor, has the characteristics of good sealing performance and long-term stability, and is impact-resistant and aesthetically pleasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a weighing sensor according to an embodiment of the utility model;

[0010] Figure 2 for Figure 1 A longitudinal cross-sectional view of

[0011] Figure 3 Figure 1 Exploded diagram of

[0012] Figure 4 A schematic diagram of the structure of the protective cover. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] like Figures 1 to 4 As shown, an integrated vulcanized sealed protection structure for a weighing sensor includes a sensor and a protective cover 6. The sensor includes an elastomer 1 and a strain gauge located on the elastomer 1. The protective cover 6 is a hollow structure with upper and lower openings that matches the size of the elastomer 1. The protective cover 6 is an integrated vulcanized protective cover. The elastomer 1 is arranged through the protective cover 6. The upper bearing end 11 and the lower fixed end 12 of the elastomer 1 are both exposed outside the protective cover 6. The protective cover 6 is sleeved outside the elastomer 1 through an integrated vulcanization molding method and is sealed and fixed to the elastomer 1. The protective cover 6 includes an integrated vulcanized silicone shell 61. The integrated vulcanized silicone shell 61 is provided with an outer cover shell 62. The outer cover shell 62 is made of metal or non-metal material. The outer cover shell 62 is attached to the outer surface of the integrated vulcanized silicone shell 61 and fixed together through a molding mold and an integrated vulcanization molding process.

[0015] A circle of grooves a and b are provided along the outer wall at the lower end of the upper bearing end 11 and the upper end of the lower fixed end 12 of the elastomer 1. The upper and lower openings of the protective cover 7 are reduced diameter openings corresponding to the grooves a and b. The elastomer 1 is arranged through the protective cover 7, the lower opening of the protective cover 7 cooperates with the upper end groove b of the lower fixed end 11, and the upper opening cooperates with the lower end groove a of the upper bearing end 11, and an integrated protective sealing structure is formed through an integrated vulcanization process.

[0016] Since the elastomer 1 and the protective cover 6 are fixed together by a vulcanization process, the present structure is suitable for elastomers of various cross-sectional shapes and sizes, such as rectangular cross-sections, circular cross-sections or various deformed cross-sections.

[0017] The weighing sensor of this embodiment also includes an upper pressure head 2, a steel ball 4 and a base plate 3. The elastic body 1 is an integral part consisting of an upper bearing end 11, a lower fixed end 12 and an integral planar bridge body 13. The integral planar bridge body 13 is arranged between the upper bearing end 11 and the lower fixed end 12. An upward protrusion is provided in the middle of the upper end surface of the integral planar bridge body 13, which is integrally connected with the middle of the lower end surface of the upper bearing end 11 to form a bearing body. The left and right sides of the lower end surface of the integral planar bridge body 13 extend downward and are integrally connected with the top surface of the lower fixed end 12 to form a supporting body. Four grooves 131 for inserting strain gauges are formed between the middle and left and right sides of the upper end surface and the lower end surface of the integral planar bridge body 13. The four strain gauges are arranged in the middle position of the groove 131 and are interconnected to form a Wheatstone bridge. The cross-section of the elastomer 1 is rectangular, the grooves a and b opened along the outer wall at the lower end of the upper bearing end 11 and the upper end of the lower fixed end 12 are rectangular grooves, the upper and lower openings of the protective cover 6 are corresponding rectangular openings, the sensor is arranged through the protective cover 6, and an integrated protective sealing structure is formed through an integrated vulcanization process.

[0018] The steel ball 4 is arranged between the upper bearing end 11 and the upper pressure head 2. The upper end surface of the upper bearing end 11 and the lower end surface of the upper pressure head 2 are respectively provided with spherical surfaces 111 and 21 which abut against the steel ball 4 and facilitate the rolling of the steel ball 4. A shield 5 is provided above the upper bearing end 11 to limit the steel ball 4. The cross section of the shield 5 is square. A partial ball hole 51 is provided through the middle of the shield 5 to match the spherical surface 111 of the upper bearing end 11. A positioning groove 52 is provided through the middle of the lower end of the shield 5 to allow the upper end of the upper bearing end 11 to be placed. The shield 5 is sleeved on the upper end of the upper bearing end 11 through the positioning groove 52. The partial ball hole 51 of the shield 5 is connected with the spherical surface 111 to form a ball socket structure for the lower part of the steel ball 4 to be placed. The lower part of the steel ball 4 is placed in the ball socket and can roll in the ball socket. The bottom plate 3 is a square plate, and mounting holes 31 for fixing the sensor are provided at the four corners of the bottom plate 3, and four fixing bolt holes are provided at the four corners of the bottom surface of the lower fixed end 12. Corresponding connecting countersunk holes 32 are provided on the bottom plate 3. The bottom plate 3 and the lower fixed end 12 are fixed by bolts, so that the sensor is fixed on the bottom plate 3, and the sensor is restricted from rotating and moving 360 degrees forward, backward, left and right.

[0019] Waterproof joints 7 are provided on the left and right sides of the upper bearing end 11 .

[0020] The specific structure inside the sensor is consistent with the prior art and will not be repeated here.

[0021] The protective cover of this embodiment adopts an integral vulcanized silicone, and is provided with an outer cover shell, the elastomer is arranged inside the protective cover, the upper bearing end and the lower fixed end are both exposed outside the protective cover, and the protective cover is wrapped 360° around the elastomer through an integral vulcanized molding method, and is sealed and fixed with the elastomer. The utility model has a simple and reasonable structure, is easy to process, and has a low cost. It can provide all-round sealing protection for the sensor, has the characteristics of good sealing performance and long-term stability, and is impact-resistant and improves aesthetics.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An integrated vulcanized sealing protection structure for a weighing sensor, comprising a sensor and a protective cover, wherein the sensor comprises an elastic body and a strain gauge located on the elastic body, characterized in that: The protective cover is a hollow structure with upper and lower openings that match the size of the elastomer. The elastomer is arranged through the protective cover, and the upper load-bearing end and the lower fixed end of the elastomer are exposed outside the protective cover. The protective cover is sleeved on the elastomer through an integrated vulcanization molding method and is sealed and fixed to the elastomer.

2. The integrated vulcanized sealing protection structure according to claim 1, characterized in that: The protective cover comprises an integral vulcanized silicone shell, an outer cover shell is arranged outside the integral vulcanized silicone shell, the outer cover shell is made of metal or non-metal material, the outer cover shell is attached to the outer surface of the integral vulcanized silicone shell and is fixed together through a molding mold and an integral vulcanization molding process.

3. The integrated vulcanized sealing protection structure according to claim 2, characterized in that: A circle of grooves is provided at the lower end of the upper bearing end and the upper end of the lower fixed end of the elastomer along the outer wall. The upper and lower openings of the protective cover are reduced diameter openings corresponding to the grooves. The elastomer is arranged through the protective cover, the lower opening of the protective cover cooperates with the upper groove of the lower fixed end, and the upper opening cooperates with the lower groove of the upper bearing end, and an integrated protective sealing structure is formed through an integrated vulcanization process.

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