Weighing sensor with pressure head
By adopting the matching structure of the concave cavity and convex ball head in the weighing sensor, combined with the design of the swing ball column, the pressure is accurately transmitted to the elastomer, which solves the problems of poor stress stability and low measurement accuracy in the prior art, and achieves a more stable weighing process and higher measurement accuracy.
Patent Information
- Application Number
- CN202422211988.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The existing weighing sensors have poor stress stability and cannot effectively eliminate lateral forces, resulting in shaking easily in actual use, affecting the measurement accuracy.
A weighing sensor with a press head is designed, adopting a matching structure of an indented cavity and a convex ball head, and the pressure is transmitted to the elastomer by swaying the ball column to ensure stable deformation of the elastomer.
It effectively avoids the shaking situation of traditional weighing sensors during use, and improves the stress stability and measurement accuracy of weighing.
Smart Images
Figure CN223037225U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of weighing sensors, and particularly relates to a weighing sensor with a pressure head. Background Art
[0002] A weighing sensor is a device that converts a mass signal into a measurable electrical signal output, and is widely used in various occasions that require accurate measurement of the weight of an object. The working principle of a weighing sensor is mainly based on physical effects, such as the resistance strain effect, electromagnetic induction, etc. When the object to be measured is placed on the sensor, the elastic element (such as an elastic body) inside the sensor will be deformed under pressure, and this deformation is converted into a change in resistance value through a sensitive element (such as a resistance strain gauge). Subsequently, the measurement circuit converts the change in resistance value into an electrical signal output, thereby realizing the measurement of the weight of the object.
[0003] The existing weighing sensors have poor force stability and cannot effectively eliminate lateral forces during actual use. Therefore, the existing weighing sensors are prone to shaking during actual use, which affects the measurement accuracy. Summary of the Utility Model
[0004] The utility model overcomes the deficiencies of the prior art and provides a weighing sensor with a pressure head to solve the problems existing in the prior art.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a weighing sensor with a pressure head, comprising
[0006] An elastic body, on which there is a concave cavity. After the concave cavity is vertically extruded along the center, the elastic body is elastically deformed under pressure;
[0007] A swing ball column, one end of which is provided with a convex spherical head. The convex spherical head is located in the concave cavity and is matched with the concave cavity to vertically extrude the concave cavity along the center;
[0008] A pressure head, which is located at the end of the swing ball column away from the convex spherical head to carry the object to be measured.
[0009] In a preferred embodiment of the utility model, a fixing ring is arranged on the elastic body, and the fixing ring is installed on the elastic body by welding or locking screws.
[0010] In a preferred embodiment of the utility model, a ring-shaped protrusion is arranged on the swing ball column. The ring-shaped protrusion is located inside the fixing ring, and the swing ball column is limited during swinging under the cooperation of the ring-shaped protrusion and the fixing ring.
[0011] In a preferred embodiment of the present utility model, an installation protrusion is provided at one end of the swing ball column away from the elastomer for installing the pressure head.
[0012] In a preferred embodiment of the present utility model, a sunken hole is provided at the central position of the concave cavity, and a conical protrusion is provided at the central position of the convex spherical head. When the convex spherical head fits with the concave cavity, the conical protrusion is located in the sunken hole.
[0013] In a preferred embodiment of the present utility model, the convex spherical head is of a cylindrical structure or a spherical structure.
[0014] In a preferred embodiment of the present utility model, the fixing ring is located on the outer circle of the swing ball column and is coaxially arranged with the swing ball column.
[0015] The present utility model solves the defects existing in the background technology and has the following beneficial effects:
[0016] 1. The weighing sensor with a pressure head of the present utility model has better force stability during weighing. Under the combined action of the concave cavity and the convex spherical head, it effectively avoids the shaking of the existing weighing sensor during use, improves the use stability of the weighing sensor, and ensures the measurement accuracy of the weighing sensor.
[0017] 2. The traditional spherical body is changed to a swing ball column. By limiting the upper and lower spherical surfaces of the swing ball column on the force-bearing surface of the elastomer during swinging, the pressure at the upper end of the pressure head is accurately transmitted to the elastomer through the swing ball column, effectively preventing the swing ball column from affecting the measurement accuracy due to the center of gravity shift. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The following further illustrates the present utility model in conjunction with the drawings and embodiments;
[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present utility model;
[0020] Figure 2 It is a cross-sectional view of a preferred embodiment of the present utility model;
[0021] Figure 3 It is a schematic diagram of the structure of the swing ball column of a preferred embodiment of the present utility model;
[0022] Figure 4 It is a schematic diagram of the structure of Embodiment 2 of the present utility model.
[0023] In the figure: 10, elastomer; 11, concave cavity; 111, sunken hole; 20, swing ball column; 21, convex spherical head; 211, conical protrusion; 30, pressure head; 40, fixing ring; 50, locking screw; 60, annular protrusion; 70, installation protrusion. Detailed implementation manners
[0024] The following will disclose multiple implementation manners of the present utility model with diagrams. For the sake of clear illustration, many physical details will be described together in the following narrative. However, it should be understood that these physical details are not used to limit the present utility model. That is to say, in some implementation manners of the present utility model, these physical details are unnecessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.
[0025] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence. Nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0026] Embodiment 1
[0027] This embodiment provides a weighing sensor with a pressure head. The weighing sensor with a pressure head has good force stability during weighing. Under the combined action of the concave cavity 11 and the convex spherical head 21, it effectively avoids the shaking situation of the existing weighing sensor during use, improves the use stability of the weighing sensor, and ensures the measurement accuracy of the weighing sensor.
[0028] Combined with Figures 1 to 3 As shown, the weighing sensor with a pressure head in this embodiment includes an elastic body 10, a swing ball column 20, and a pressure head 30. The elastic body 10, the swing ball column 20, and the pressure head 30 are arranged from bottom to top. The object to be measured is placed on the pressure head 30, and the elastic body 10 is pressed down through the swing ball column 20. The deformation of the elastic body 10 is converted into a change in resistance value by a sensitive element to complete the weighing operation of the object to be measured.
[0029] In this embodiment, a concave cavity 11 is provided on the elastomer 10. One end of the swing ball column 20 is provided with a convex spherical head 21. The pressure head 30 is located at the end of the swing ball column 20 away from the convex spherical head 21 to carry the object to be measured. The convex spherical head 21 is located in the concave cavity 11 and cooperates with the concave cavity 11 to vertically squeeze the concave cavity 11 along the center. Under the action of the object to be measured on the pressure head 30, the swing ball column 20 vertically squeezes the concave cavity 11 along the center by the convex spherical head 21, so that the elastomer 10 undergoes elastic deformation to complete the weighing of the object to be measured.
[0030] As Figure 2 shown, a sinking hole 111 is provided at the center position of the concave cavity 11 in this embodiment, and a conical protrusion 211 is provided at the center position of the convex spherical head 21. When the convex spherical head 21 fits with the concave cavity 11, the conical protrusion 211 is located in the sinking hole 111. Under the combined action of the conical protrusion 211 and the sinking hole 111, the convex spherical head 21 is stably fitted with the concave cavity 11. Therefore, the cooperation between the conical protrusion 211 and the sinking hole 111 can play a guiding role in the fitting of the convex spherical head 21 and the concave cavity 11, improving the weighing accuracy of the object to be measured.
[0031] In this embodiment, the convex spherical head 21 is of a cylindrical structure or a spherical structure. A fixing ring 40 is provided on the elastomer 10. The fixing ring 40 is installed on the elastomer 10 by welding or locking screws 50. The fixing ring 40 is located outside the swing ball column 20 and is coaxially arranged with the swing ball column 20. The fixing ring 40 can limit the swing ball column 20 during swinging to prevent the swing ball column 20 from tilting during the weighing process and improve the weighing accuracy.
[0032] Furthermore, an annular protrusion 60 is provided on the elastomer 10. The annular protrusion 60 is located inside the fixing ring 40 to limit the swing ball column 20 during swinging. An installation protrusion 70 is provided at the end of the elastomer 10 away from the swing ball column 20 to install the pressure head 30. Under the combined action of the annular protrusion 60 and the fixing ring 40, the swing ball column 20 is stably limited during swinging, thus preventing the swing ball column 20 from tilting during the weighing process, while the installation protrusion 70 can effectively install the pressure head 30 for carrying the object to be measured.
[0033] In actual use of the weighing sensor with a pressure head in this embodiment, the object to be measured is placed on the pressure head 30. The pressure head 30 presses down on the swing ball column 20. Under the downward pressure of the swing ball column 20, the elastomer 10 undergoes elastic deformation. The deformation of the elastomer 10 is converted into a change in resistance value by a sensitive element to complete the weighing operation of the object to be measured.
[0034] Embodiment Two
[0035] As Figure 4As shown in the figure, the difference between the load cell with a pressure head in this embodiment and that in the first embodiment is that the convex structure is located on the elastomer 10, while the concave structure is located on the swing ball column 20. Under the combined action of the convex structure and the concave structure, it effectively prevents the swing ball column 20 from affecting the measurement accuracy due to the center of gravity offset. The convex structure is located on the elastomer 10, while the concave structure is located on the swing ball column 20. Under the combined action of the convex structure and the concave structure, it effectively prevents the swing ball column 20 from affecting the measurement accuracy due to the center of gravity offset.
[0036] Embodiment III
[0037] The difference between the load cell with a pressure head in this embodiment and that in the first embodiment is that the fixing ring is cancelled, and the structure of the fixing ring is integrated with the elastomer. The elastomer is provided with a cylindrical hole surface to form a clearance fit with the annular protrusion 60 on the swing ball column 20, which plays a role in restricting planar movement.
[0038] Embodiment IV
[0039] The difference between the load cell with a pressure head in this embodiment and that in the second embodiment is that the fixing ring is cancelled, and the structure of the fixing ring is integrated with the elastomer. The elastomer is provided with a cylindrical hole surface to form a clearance fit with the annular protrusion 60 on the swing ball column 20, which plays a role in restricting planar movement.
[0040] All in all, for the load cell with a pressure head in this embodiment, its weighing force stability is good. Under the combined action of the concave cavity 11 and the convex spherical head 21, it effectively avoids the situation of shaking in the use of the existing load cell. While improving the use stability of the load cell, it ensures the measurement accuracy of the load cell;
[0041] The traditional spherical body is changed to a swing ball column. By limiting the upper and lower spherical surfaces of the swing ball column during swinging on the force-bearing surface of the elastomer, it prevents the pressure at the upper end of the pressure head from being accurately transmitted to the elastomer through the swing ball column, and effectively prevents the swing ball column from affecting the measurement accuracy due to the center of gravity offset.
[0042] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the present invention. That is to say, the methods, systems or devices discussed above are all examples. Various configurations can be appropriately omitted, replaced or added with various processes or components. For example, in an alternative configuration, the method can be executed in a different order from the described order, and / or various stages can be added, omitted and / or combined. Moreover, the features described with respect to certain configurations can be combined in various other configurations. Different aspects and elements of the configurations can be combined in a similar manner. In addition, with the development of technology, many elements are only examples and do not limit the scope of the present disclosure or the claims.
[0043] Specific details are given in the description to provide a thorough understanding of the exemplary configurations including the implementation. However, the configurations may be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. The description only provides example configurations and does not limit the scope, applicability, or configurations of the claims. Instead, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.
[0044] In addition, although each operation may describe the operation as a sequential process, many operations may be performed in parallel or simultaneously. Additionally, the order of the operations may be rearranged. A process may have other steps. Further, examples of the methods may be implemented by hardware, software, firmware, middleware, code, a hardware description language, or any combination thereof. When implemented in software, firmware, middleware, or code, the program code or code segments for performing the necessary tasks may be stored in a non-transitory computer-readable medium such as a storage medium and executed by a processor to perform the described tasks.
[0045] In summary, it is intended that the foregoing detailed description be considered illustrative rather than restrictive, and it should be understood that the claims (including all equivalents) are intended to define the spirit and scope of the present utility model. The above embodiments should be understood as being only for illustrative purposes of the present utility model and not for limiting the protection scope of the present utility model. After reading the content recorded in the present utility model, those skilled in the art may make various changes or modifications to the present utility model, and these equivalent changes and modifications also fall within the scope defined by the claims of the present utility model.
Claims
1. A weighing sensor with a pressure head, characterized in that: include An elastic body (10), wherein an inner concave cavity (11) is provided on the elastic body (10), and when the inner concave cavity (11) is vertically squeezed along the center, the elastic body (10) is elastically deformed under pressure; A swing ball column (20), wherein a convex ball head (21) is provided at one end of the swing ball column (20), wherein the convex ball head (21) is located in the concave cavity (11) and cooperates with the concave cavity (11) to vertically squeeze the concave cavity (11) along the center; A pressure head (30) is located at one end of the swinging ball column (20) away from the convex ball head (21) to support the object to be tested.
2. A weighing sensor with a pressure head according to claim 1, characterized in that: The elastic body (10) is provided with a fixing ring (40), and the fixing ring (40) is mounted on the elastic body (10) by welding or locking screws (50).
3. A weighing sensor with a pressure head according to claim 2, characterized in that: The swing ball column (20) is provided with an annular protrusion (60), which is located inside the fixing ring (40). The swing ball column (20) is limited in position during swinging by the cooperation of the annular protrusion (60) and the fixing ring (40).
4. A weighing sensor with a pressure head according to claim 3, characterized in that: The end of the swing ball column (20) away from the elastic body (10) is provided with a mounting protrusion (70) for mounting the pressure head (30).
5. A weighing sensor with a pressure head according to claim 1, characterized in that: A sink hole (111) is provided at the center of the inner concave cavity (11), and a conical protrusion (211) is provided at the center of the convex ball head (21); when the convex ball head (21) is fitted with the inner concave cavity (11), the conical protrusion (211) is located in the sink hole (111).
6. A weighing sensor with a pressure head according to claim 1, characterized in that: The convex ball head (21) is a cylindrical structure or a spherical structure.
7. A weighing sensor with a pressure head according to claim 4, characterized in that: The fixing ring (40) is located on the outer ring of the swing ball column (20) and is coaxially arranged with the swing ball column (20).