Elastic body of force transducer
By setting a heat-conducting sheet and a heat sink on the outside of the force sensor elastomer, and using copper and thermally conductive silicone materials, the problems of decreased measurement accuracy and shortened lifespan at high temperatures are solved, achieving efficient heat dissipation and stable measurement.
Patent Information
- Application Number
- CN202520297412.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing force sensor elastomers experience decreased measurement accuracy and shortened service life when operating at high temperatures, mainly due to changes in deformation and resistance caused by the increase in elastomer temperature.
A heat-conducting sheet and a heat dissipation plate are set on the outside of the elastomer. Copper heat dissipation sheets and frame plates are used to improve the thermal conductivity. The heat dissipation area is increased by the sheet design. Combined with heat-conducting sheets made of thermally conductive silicone, close contact and efficient heat transfer are ensured. At the same time, anti-slip texture is set on the stress plate to increase stability.
It effectively reduces heat buildup inside the elastomer, prevents high-temperature deformation, improves measurement accuracy and extends service life, and ensures high-precision measurement even in high-temperature environments.
Smart Images
Figure CN223650024U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of force sensor technology, and in particular to a force sensor elastomer. Background Technology
[0002] A force sensor is a device component used to measure and convert force. Its core function is to convert applied mechanical quantities such as tension and pressure into corresponding electrical signals. This conversion process relies on the elastic structure inside the force sensor. Through a carefully designed structure, it can deform when subjected to external force and convert this deformation into a measurable electrical signal through internal electrical components, thereby achieving accurate measurement of mechanical quantities. In practical applications, this force sensor elastomer is widely used in various occasions that require force measurement, such as industrial automation, mechanical testing, and vehicle safety.
[0003] Chinese patent discloses an elastic structure for a force sensor (authorization announcement number CN215064972U). When the load reaches a certain value above the rated load, the overload protection grooves function. When the load is applied to the elastic body, the elastic body deforms, and the cut grooves will fit together. This is equivalent to all four columns bearing the external load, thus achieving the overload protection function.
[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: In practical applications, the elastomer structure of traditional force sensors will be compressed due to long-term use, causing its own temperature to rise. This leads to changes in the amount of deformation of the elastomer when subjected to force, and its own resistance also changes accordingly. This changes the output signal of the strain gauge, resulting in a decrease in measurement accuracy. At the same time, high-temperature operation will accelerate the aging of the elastomer, resulting in a reduction in the elastomer's lifespan. Therefore, controlling the temperature of the elastomer itself plays a crucial role. Utility Model Content
[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that the high temperature operation of the elastomer affects the measurement accuracy and reduces its service life. To this end, we propose an elastomer for force sensor.
[0006] To achieve the above objectives, this application adopts the following technical solution: a force sensor elastomer, comprising an elastomer body, a transmission line installed on one side of the elastomer body, a force-bearing plate threadedly connected to the top of the elastomer body, a bearing plate fixedly connected to the outer side of the bottom of the elastomer body, a heat-conducting sheet attached to the surface of the elastomer body, a heat dissipation plate attached to the surface of the heat-conducting sheet, a plurality of heat dissipation fins fixedly connected to the surface of the heat dissipation plate, and a frame plate fixedly connected between the plurality of heat dissipation fins. The heat dissipation plate, heat dissipation fins, and frame plate are all made of copper.
[0007] Preferably, the surface of the elastomer body is provided with six through grooves, and the bottom of the inner diameter of the through grooves is provided with threaded holes.
[0008] Preferably, a spacer layer is provided between each of the plurality of heat sinks, and the spacer layer is placed between the heat sink plate and the frame plate.
[0009] Preferably, the top of the force-bearing plate has several anti-slip patterns, and the surface of the force-bearing plate has a striped, uneven texture.
[0010] Preferably, the heat-conducting sheet is made of thermally conductive silicone.
[0011] Preferably, the heat sink is placed on the outside of the heat sink plate, the heat sink plate is made of pure copper, and the heat-conducting sheet is placed between the heat sink plate and the elastomer body.
[0012] The technical effects and advantages of this utility model are as follows:
[0013] In this invention, a heat-conducting sheet is placed on the outside of the elastomer body to conduct heat to the heat sink. Heat is then exchanged between the heat sink and the frame plate through the heat sink. Copper material is used to ensure the thermal conductivity of the heat sink, frame plate, and heat sink. The sheet-like design of the heat sink and frame plate increases the contact area between the heat sink, frame plate, and air, further guiding heat out of the elastomer body and preventing heat accumulation inside the elastomer body from causing deformation during long-term operation. This improves the heat dissipation effect of the elastomer body and effectively reduces the thermal expansion effect of the elastomer body when used in high-temperature environments, preventing the elastomer body from affecting the force measurement accuracy due to overheating expansion. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0015] Figure 2 This is a top view of the position and structure of the heat sink and heat fins of this utility model;
[0016] Figure 3 This is an exploded view of the main structure of this utility model;
[0017] Figure 4 This is a sectional view of the vertical cross-section of this utility model.
[0018] Legend: 1. Elastomer body; 2. Transmission line; 3. Force plate; 4. Bearing plate; 5. Heat-conducting plate; 6. Heat sink; 7. Heat sink; 8. Frame plate; 9. Through groove; 10. Threaded hole; 11. Spacer layer; 12. Anti-slip texture. Detailed Implementation
[0019] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0020] Reference Figure 1 - Figure 4 As shown, this utility model provides a technical solution: a force sensor elastomer, including an elastomer body 1, a transmission line 2 installed on one side of the elastomer body 1, a force-bearing plate 3 threadedly connected to the top of the elastomer body 1, a bearing plate 4 fixedly connected to the outer side of the bottom of the elastomer body 1, a heat-conducting sheet 5 attached to the surface of the elastomer body 1, a heat dissipation plate 6 attached to the surface of the heat-conducting sheet 5, a plurality of heat dissipation fins 7 fixedly connected to the surface of the heat dissipation plate 6, and a frame plate 8 fixedly connected between the plurality of heat dissipation fins 7. The heat dissipation plate 6, the heat dissipation fins 7, and the frame plate 8 are all made of copper. By setting the heat-conducting sheet 5 on the outer side of the elastomer body 1, the elastomer... The heat of the body 1 is conducted to the heat sink 6, allowing the heat to interact between the heat sink 7 and the frame plate 8. Copper material is used to ensure the thermal conductivity of the heat sink 7, the frame plate 8, and the heat sink 6. The sheet-like design of the heat sink 7 and the frame plate 8 increases the contact area between the heat sink 7 and the frame plate 8 and the air, further guiding the heat out of the elastomer body 1 and preventing the heat from accumulating inside the elastomer body 1 and deforming during long-term operation. This improves the heat dissipation effect of the elastomer body 1 and effectively reduces the thermal expansion effect of the elastomer body 1 when used in high-temperature environments, preventing the elastomer body 1 from affecting the force measurement accuracy due to overheating expansion.
[0021] Reference Figure 4 As shown in this embodiment: six through grooves 9 are formed on the surface of the elastomer body 1, and threaded holes 10 are formed at the bottom of the inner diameter of the through grooves 9. By connecting the threaded holes 10 with the through grooves 9, the exchange area between the middle part of the elastomer body 1 and the air is increased, thereby increasing the heat dissipation effect of the elastomer body 1. At the same time, the threaded holes 10 used to install and fix the elastomer body 1 are connected with the through grooves 9, ensuring that the frictional heat generated by the bolts installed inside the threaded holes 10 during the actual use of the elastomer body 1 can be discharged normally.
[0022] Reference Figure 2 As shown in this embodiment: a spacer layer 11 is provided between several heat sinks 7. The spacer layer 11 is placed between the heat sink 6 and the frame plate 8. An air circulation layer is formed by the air flowing in the spacer layer 11, which ensures that the heat sink 7 can contact the air on multiple sides to conduct heat. At the same time, the air circulation layer reduces the interaction efficiency between the external heat and the heat sink 6 and the frame plate 8, and reduces the temperature rise effect of the external heat on the elastomer body 1.
[0023] Reference Figure 1 , Figure 3 As shown in this embodiment: the top of the force plate 3 is provided with a number of anti-slip textures 12, and the surface of the force plate 3 is striped and uneven. By providing anti-slip textures 12, the top contact surface of the force plate 3 has multiple textures, which can increase the friction between the object and the force plate 3, improve the stability when the object is in contact with the force plate 3, prevent the object from sliding and deviating when it is pressed down, reduce the force effect of the force plate 3, and affect the measurement accuracy of the elastic body 1.
[0024] Reference Figure 2 , Figure 3 and Figure 4 As shown in this embodiment: the heat-conducting sheet 5 is made of thermally conductive silicone material. By using thermally conductive silicone material, the heat-conducting sheet 5 has a high thermal conductivity, which can efficiently guide and transfer heat. At the same time, it is relatively soft. When the heat sink 6 is sleeved on the outside of the heat-conducting sheet 5, the heat-conducting sheet 5 can deform and make close contact with the heat sink 6, reducing the gap between the heat-conducting sheet 5 and the heat sink 6, which is more conducive to heat transfer. It can also firmly restrict the heat sink 6 to the outside of the elastomer body 1, making it easier for workers to disassemble and install the heat-conducting sheet 5 and the heat sink 6.
[0025] Reference Figure 2 and Figure 3 As shown in this embodiment: the heat sink 7 is placed on the outside of the heat sink 6, which is made of pure copper. The heat conduction sheet 5 is placed between the heat sink 6 and the elastomer body 1. By placing the heat sink 6 and the heat sink 7 on the outside of the elastomer body 1 to guide and dissipate heat, the heat sink 6 and the heat sink 7 also wrap the elastomer body 1, preventing the elastomer body 1 from being deformed and damaged by collision with objects from the outside. At the same time, the heat conduction sheet 5, placed between the heat sink 6 and the elastomer body 1, can absorb and buffer the impact generated by the collision of the heat sink 6 through the soft characteristics of the heat conduction sheet 5, further improving the protective performance of the heat sink 6 for the elastomer body 1.
[0026] Working principle: By setting a heat-conducting plate 5 on the outside of the elastomer body 1, the heat of the elastomer body 1 is conducted to the heat sink 6. The heat is then exchanged between the heat sink 7 and the frame plate 8 through the heat sink 6. Copper material is used to ensure the thermal conductivity of the heat sink 7, frame plate 8, and heat sink 6. The sheet-like design of the heat sink 7 and frame plate 8 increases the contact area between the heat sink 7 and frame plate 8 and the air, further guiding the heat out of the elastomer body 1 and preventing the heat from accumulating inside the elastomer body 1 and deforming during long-term operation. This improves the heat dissipation effect of the elastomer body 1 and effectively reduces the thermal expansion effect of the elastomer body 1 when used in high-temperature environments, preventing the elastomer body from deforming. The force measurement accuracy is affected by the expansion of the body 1 due to overheating. By connecting the threaded hole 10 and the through groove 9, the exchange area between the middle of the elastomer body 1 and the air is increased, thereby increasing the heat dissipation effect of the elastomer body 1 itself. At the same time, the connection between the threaded hole 10 and the through groove 9 used to install and fix the elastomer body 1 ensures that the frictional heat generated by the bolts installed inside the threaded hole 10 during the actual use of the elastomer body 1 can be properly discharged. The air circulation layer formed by the air flowing in the spacer layer 11 ensures that the heat sink 7 can contact the air on multiple sides to conduct heat. At the same time, the formed air circulation layer reduces the interaction efficiency between the external heat and the heat sink 6 and the frame plate 8, thus reducing the external heat. The temperature rise caused by the quantity of the object on the elastomer body 1 is mitigated by the anti-slip texture 12, which creates multiple textures on the top contact surface of the force plate 3. This increases the friction between the object and the force plate 3, improves the stability of the contact between them, prevents the object from sliding or shifting when pressed down, and reduces the force-bearing effect of the force plate 3. This, in turn, affects the measurement accuracy of the elastomer body 1. The use of thermally conductive silicone material gives the heat-conducting sheet 5 a high thermal conductivity, enabling efficient heat conduction. Its softness allows the heat-conducting sheet 5 to deform and make close contact with the heat sink 6 when it is fitted over the heat sink 6, reducing the friction between the heat-conducting sheet 5 and the heat sink 6. The gaps between the heat sinks 6 facilitate heat transfer and securely confine the heat sinks 6 to the outside of the elastomer body 1. This makes it easier for workers to disassemble and install the heat-conducting pads 5 and the heat sinks 6. While the heat sinks 6 and 7 are placed on the outside of the elastomer body 1 to guide and dissipate heat, they also wrap around the elastomer body 1, preventing it from deforming and being damaged by collisions with objects. At the same time, the heat-conducting pads 5, placed between the heat sinks 6 and the elastomer body 1, absorb and buffer the impact of collisions caused by collisions through the soft properties of the heat-conducting pads 5, further enhancing the protective performance of the heat sinks 6 for the elastomer body 1.
[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A force sensor elastomer, comprising an elastomer body (1), characterized in that: A transmission line (2) is installed on one side of the elastomer body (1). A force-bearing plate (3) is threaded to the top of the elastomer body (1). A bearing plate (4) is fixedly connected to the outer side of the bottom of the elastomer body (1). A heat-conducting sheet (5) is attached to the surface of the elastomer body (1). A heat dissipation plate (6) is attached to the surface of the heat-conducting sheet (5). Several heat dissipation fins (7) are fixedly connected to the surface of the heat dissipation plate (6). A frame plate (8) is fixedly connected between the several heat dissipation fins (7). The heat dissipation plate (6), heat dissipation fins (7) and frame plate (8) are all made of copper.
2. The force sensor elastomer according to claim 1, characterized in that: The surface of the elastomer body (1) is provided with six through grooves (9), and the bottom of the inner diameter of the through grooves (9) is provided with threaded holes (10).
3. The force sensor elastic body according to claim 1, characterized in that: A spacer layer (11) is provided between each of the heat sinks (7), and the spacer layer (11) is placed between the heat sink (6) and the frame plate (8).
4. The force sensor elastic body according to claim 1, characterized in that: The top of the load-bearing plate (3) has several anti-slip patterns (12), and the surface of the load-bearing plate (3) is uneven with stripes.
5. The force sensor elastic body according to claim 1, characterized in that: The heat-conducting sheet (5) is made of thermally conductive silicone.
6. The force sensor elastomer according to claim 1, characterized in that: The heat sink (7) is placed outside the heat sink (6), which is made of pure copper. The heat-conducting sheet (5) is placed between the heat sink (6) and the elastomer body (1).