Multi-dimensional force sensor with anti-overload elastomer structure
By introducing a heat dissipation mechanism and buffer components into the multi-dimensional force sensor, the problem of insufficient heat dissipation under high load is solved, the heat dissipation efficiency and overload resistance of the sensor are improved, the service life is extended, and the stability of measurement is guaranteed.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-06
AI Technical Summary
Existing multi-dimensional force sensors suffer from severe heat dissipation problems under high-load operating conditions, leading to increased temperature and affecting measurement accuracy and service life.
A multidimensional force sensor with an overload-resistant elastomer structure was designed, employing a combination of heat dissipation mechanism and buffer assembly, including a rotating ring, limiting post, heat dissipation fins and buffer assembly. The design of the rotating ring improves heat dissipation efficiency, and the buffer assembly prevents irreversible deformation of the elastic element.
It effectively improves the heat dissipation efficiency of the sensor, extends its service life, ensures the stability and accuracy of force measurement, and prevents plastic deformation of elastic components due to overload.
Smart Images
Figure CN223976775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of multidimensional force sensor technology, and in particular to a multidimensional force sensor containing an overload-resistant elastomer structure. Background Technology
[0002] A multidimensional force sensor is a precision measuring instrument capable of simultaneously measuring force components in multiple directions. It is widely used in industrial manufacturing, robotics control, biomechanical research, and other fields. It accurately senses and converts force information, providing crucial data support for various systems. The elastic body is the core component of a multidimensional force sensor for force measurement. When an external force acts on the sensor, the elastic body undergoes elastic deformation, and the degree of deformation has a strict correspondence with the magnitude of the applied force. This deformation is a direct manifestation of force, laying the foundation for subsequent force-to-electrical conversion.
[0003] With the continuous expansion of sensor applications and the increase in workload, heat dissipation issues are becoming increasingly prominent. Under high-load operating conditions, a large amount of heat is generated inside the sensor. If heat cannot be dissipated effectively and in a timely manner, the performance of internal components will be severely affected. However, the sensor's self-heating alone is insufficient to meet actual needs, leading to an increase in its own temperature. This increase in temperature causes changes in the resistance characteristics of the strain gauge, resulting in a decrease in the accuracy of force measurement. Prolonged exposure to high-temperature environments also accelerates the aging of electronic components, significantly shortens the sensor's lifespan, increases equipment maintenance costs and downtime, and affects production efficiency and research progress. Therefore, a multidimensional force sensor with an overload-resistant elastomer structure is proposed to solve the above problems. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a multi-dimensional force sensor with an overload-resistant elastomer structure, which aims to improve the problem in the prior art where the sensor generates a lot of internal heat under high load and its own heat dissipation cannot meet the requirements, which will cause the temperature to rise and affect the service life of the sensor.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-dimensional force sensor containing an overload-resistant elastomer structure, including a top cover, a base fixedly connected to the bottom of the top cover, an elastic element fixedly connected to the inner wall of the base, and a heat dissipation mechanism provided on the top of the top cover.
[0006] The heat dissipation mechanism includes a rotating ring rotatably connected to the inner wall of the top of the upper cover. The inner wall of the rotating ring is elastically connected to a limiting post via a connecting spring. A circular groove is formed at the top of the limiting post, and a contact component is provided on the inner wall of the circular groove. A square groove is formed on the outer arc surface of the rotating ring, and a guide groove is formed on the outer arc surface of the upper cover. A positioning block is in contact with the inner surface of the guide groove. A heat dissipation fin is fixedly connected to the outer wall of the positioning block, and a protrusion is fixedly connected to the outer wall of the heat dissipation fin. A buffer component is provided on the outer wall of the elastic element.
[0007] As a further description of the above technical solution:
[0008] The contact assembly includes a damping shaft rotatably connected to the inner wall of the circular groove, and a rubber disc is fixedly connected to the outer wall of the damping shaft.
[0009] As a further description of the above technical solution:
[0010] The outer wall of the limiting post is slidably connected to the inner wall of the rotating ring.
[0011] As a further description of the above technical solution:
[0012] The top of the cover has a positioning groove, and the bottom end of the limiting post is inserted into the inner surface of the positioning groove.
[0013] As a further description of the above technical solution:
[0014] The square groove matches the guide groove, and the outer wall of the positioning block matches the guide groove.
[0015] As a further description of the above technical solution:
[0016] The end cross-section of the damping shaft is T-shaped.
[0017] As a further description of the above technical solution:
[0018] The buffer assembly includes a rigid ring, the inner wall of which is fixedly connected to a rubber ring, the inner wall of which is in contact with the outer wall of the elastic element, and a limit plate is fixedly connected to the outer wall of the rigid ring.
[0019] As a further description of the above technical solution:
[0020] Both the rigid ring and the rubber ring have circular holes on their outer walls.
[0021] As a further description of the above technical solution:
[0022] Both the rigid ring and the rubber ring have support grooves at their bottoms.
[0023] As a further description of the above technical solution:
[0024] The inner wall of the limiting plate is detachably installed inside the bottom of the base by bolts.
[0025] This utility model has the following beneficial effects:
[0026] 1. In this utility model, by cooperating with the upper cover, base and heat dissipation mechanism and other structures, the square groove and guide groove are on the same horizontal plane when installing the heat dissipation fins, and then the heat dissipation fins are inserted to complete the fixation. The heat dissipation fins enhance the overall heat dissipation effect of the sensor, thereby extending the service life of the heat sink.
[0027] 2. In this invention, through the cooperation of the buffer components and other structures, the buffer assembly composed of the rubber ring and the rigid ring begins to function when encountering instantaneous impact force or overload force. This avoids irreversible plastic deformation of the elastic element due to overload, ensuring that the elastic element always works within its normal elastic range, maintaining the stability and reliability of force measurement, and ensuring the accuracy of each measurement data. Attached Figure Description
[0028] Figure 1 This is a three-dimensional schematic diagram of a multi-dimensional force sensor containing an anti-overload elastomer structure proposed in this utility model.
[0029] Figure 2 A schematic diagram showing the disassembled positioning block and its top cover of a multi-dimensional force sensor containing an overload-resistant elastomer structure proposed in this utility model.
[0030] Figure 3 This is a three-dimensional schematic diagram of the rotating ring of a multi-dimensional force sensor containing an overload-resistant elastomer structure proposed in this utility model.
[0031] Figure 4 This is a schematic diagram of the internal cross-section of a rotating ring of a multidimensional force sensor containing an anti-overload elastomer structure proposed in this utility model.
[0032] Figure 5 This is a schematic diagram of the internal cross-section of the limiting column of a multi-dimensional force sensor containing an overload-resistant elastomer structure proposed in this utility model.
[0033] Figure 6 This is a schematic diagram showing the disassembled top cover and base of a multidimensional force sensor containing an overload-resistant elastomer structure proposed in this utility model.
[0034] Figure 7 This is a three-dimensional schematic diagram of the heat dissipation fins of a multi-dimensional force sensor containing an overload-resistant elastomer structure proposed in this utility model.
[0035] Legend:
[0036] 1. Top cover; 2. Base; 3. Heat dissipation mechanism; 301. Heat dissipation fins; 302. Positioning block; 303. Rotating ring; 304. Connecting spring; 305. Limiting post; 306. Contact assembly; 3061. Rubber disc; 3062. Damping shaft; 308. Protrusion; 4. Elastic element; 5. Buffer assembly; 501. Rigid ring; 502. Rubber ring; 503. Limiting plate. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0038] Reference Figures 1-2 and Figure 6 One embodiment of this utility model is a multi-dimensional force sensor containing an overload-resistant elastomer structure, including an upper cover 1, a base 2 fixedly connected to the bottom of the upper cover 1, an elastic element 4 fixedly connected to the inner wall of the base 2, and a corresponding strain gauge can be installed on the elastic element 4. This is prior art and will not be explained in detail here. A heat dissipation mechanism 3 is provided on the top of the upper cover 1. The heat dissipation mechanism 3 can improve the heat dissipation effect of the multi-dimensional force sensor, thereby improving the overall service life.
[0039] Reference Figures 3-5The heat dissipation mechanism 3 includes a rotating ring 303 rotatably connected to the inner wall of the top of the upper cover 1. The inner wall of the rotating ring 303 is elastically connected to a limiting post 305 via a connecting spring 304. The elasticity of the connecting spring 304 enables the limiting post 305 to have the functions of resetting and limiting, and can fix the rotating ring 303. A circular groove is formed on the top of the limiting post 305, and a contact component 306 is provided on the inner wall of the circular groove. The circular groove is designed to accommodate the contact component 306, and the limiting post 305 can be moved by the contact component 306. A square groove is formed on the outer arc surface of the rotating ring 303, and a guide groove is formed on the outer arc surface of the upper cover 1. The inner surface of the guide groove contacts a positioning device. When the square groove and the guide groove are on the same vertical plane, the positioning block 302 can be installed. After the positioning block 302 is installed, the rotating ring 303 can be rotated to prevent the positioning block 302 from sliding out. The outer wall of the positioning block 302 is fixedly connected to the heat dissipation fins 301, and the outer wall of the heat dissipation fins 301 is fixedly connected to the protrusions 308. The heat dissipation fins 301 can improve the heat dissipation efficiency of the multi-dimensional force sensor, and the protrusions 308 can increase the contact area between the air and the heat dissipation fins 301, thereby improving the heat dissipation efficiency. The outer wall of the elastic element 4 is provided with a buffer component 5. The buffer component 5 can improve the overload resistance of the elastic element 4.
[0040] Reference Figures 3-5 The contact component 306 includes a damping shaft 3062 rotatably connected to the inner wall of the circular groove. A rubber disc 3061 is fixedly connected to the outer wall of the damping shaft 3062. The damping shaft 3062 prevents the rubber disc 3061 from rotating easily. When the rubber disc 3061 is in a horizontal position, it covers the circular groove, and the top of the limiting post 305 is flush with the top of the rotating ring 303. When the limiting post 305 needs to be moved, the rubber disc 3061 is pressed down, causing it to flip. Then, the rubber disc 3061 can be pinched and moved upward, causing the limiting post 305 to move upward. The outer wall of the limiting post 305 penetrates and slides through the inner wall of the rotating ring 303. The limiting post 305 is positioned to move upward, thereby releasing the restriction on the rotating ring 303. A positioning groove is opened on the top of the upper cover 1, and the bottom end of the limiting post 305 is inserted into the inner surface of the positioning groove. The two are inserted to fix the rotating ring 303. The square groove matches the guide groove, and the outer wall of the positioning block 302 matches the guide groove. The square groove and the guide groove can guide the positioning block 302. There are two sets of positioning blocks 302. After installation, the top of the uppermost positioning block 302 contacts the bottom of the rotating ring 303. At this time, the positioning block 302 and its heat dissipation fins 301 will not move vertically. The end cross-section of the damping shaft 3062 is T-shaped. The T-shape prevents it from falling off during rotation.
[0041] Reference Figures 6-7The buffer assembly 5 includes a rigid ring 501, and a rubber ring 502 is fixedly connected to the inner wall of the rigid ring 501. The inner wall of the rubber ring 502 is in contact with the outer wall of the elastic member 4. When the elastic member 4 undergoes a large deformation, it will first contact the rubber ring 502 and then continue to contact the inner wall of the rigid ring 501, thereby improving the overload resistance of the elastic member 4. A limiting plate 503 is fixedly connected to the outer wall of the rigid ring 501. Multiple sets of limiting plates 503 are provided. Circular holes are opened on the outer walls of both the rigid ring 501 and the rubber ring 502. Multiple sets of circular holes are provided to achieve heat dissipation. Support grooves are opened at the bottom of both the rigid ring 501 and the rubber ring 502. The support grooves facilitate positioning above the elastic member 4. The inner wall of the limiting plate 503 is detachably installed inside the bottom of the base 2 by bolts, thereby fixing the rigid ring 501.
[0042] Working principle: When the multidimensional force sensor is subjected to an external force, the force is transmitted to the elastic element 4 through the upper cover 1, and the elastic element 4 will undergo corresponding elastic deformation. Since a strain gauge (existing technology) is installed on the elastic element 4, the strain gauge will generate a change in resistance as the elastic element 4 deforms, thereby converting the force signal into an electrical signal to realize the measurement of force. When it is necessary to install the heat dissipation fin 301, press down on the rubber disc 3061. Due to the action of the damping shaft 3062, the rubber disc 3061 will flip. Then, pinch the rubber disc 3061 and move it upward, driving the limiting post 305 to move upward, releasing the limitation on the rotating ring 303. Then, find the square groove on the outer arc surface of the rotating ring 303 and align the square groove with the guide groove on the outer arc surface of the upper cover 1 in the same vertical plane. Insert the positioning block 302 along the guide groove and square groove. After installation, rotate the rotating ring 303 to the right (e.g., Figure 3 As shown, the positioning block 302 is prevented from sliding out. The installed heat dissipation fins 301 and the protrusions 308 on their outer walls increase the contact area between the air and the heat dissipation fins 301. When the sensor generates heat during operation, the heat is conducted to the heat dissipation fins 301 through the upper cover 1. The air makes full contact with the heat dissipation fins 301, carrying away the heat, thereby improving the heat dissipation efficiency of the multi-dimensional force sensor and helping to extend its overall service life.
[0043] When the elastic element 4 is subjected to a small force, it undergoes normal elastic deformation for force measurement. When the elastic element 4 is subjected to a larger force and undergoes a larger deformation, it will first contact the rubber ring 502. The rubber ring 502 has a certain degree of elasticity and can play a preliminary buffering role, absorbing some energy. If the force continues to increase, the elastic element 4 will continue to contact the inner wall of the rigid ring 501. The rigid ring 501 can provide stronger support force, limiting the excessive deformation of the elastic element 4, thereby improving the overload resistance of the elastic element 4.
[0044] 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 multi-dimensional force sensor comprising an anti-overload elastomeric structure, comprising an upper cover (1), characterized in that: The bottom of the upper cover (1) is fixedly connected with a base (2), the inner wall of the base (2) is fixedly connected with an elastic member (4), and the top of the upper cover (1) is provided with a heat dissipation mechanism (3). The heat dissipation mechanism (3) comprises a rotating ring (303) rotatably connected to the inner wall of the top of the upper cover (1), the inner wall of the rotating ring (303) is elastically connected with a limiting column (305) through a connecting spring (304), the top of the limiting column (305) is provided with a circular groove, the inner wall of the circular groove is provided with a contact assembly (306), the outer arc surface of the rotating ring (303) is provided with a square groove, the outer arc surface of the upper cover (1) is provided with a guide groove, the inner surface of the guide groove is in contact with a positioning block (302), the outer wall of the positioning block (302) is fixedly connected with a heat dissipation fin (301), the outer wall of the heat dissipation fin (301) is fixedly connected with a protrusion (308), and the outer wall of the elastic member (4) is provided with a buffer assembly (5).
2. A multi-axis force sensor containing an anti-overload elastomeric structure according to claim 1, characterized in that: The contact assembly (306) comprises a damping rotating shaft (3062) rotatably connected to the inner wall of the circular groove.
3. A multi-axis force sensor containing an anti-overload elastomeric structure according to claim 1, characterized in that: The outer wall of the limiting column (305) penetrates and is slidably connected to the inner wall of the rotating ring (303).
4. The multi-axis force sensor containing an anti-overload elastomeric structure according to claim 1, characterized in that: The top of the upper cover (1) is provided with a positioning groove, and the bottom end of the limiting column (305) is inserted into the inner surface of the positioning groove.
5. The multi-axis force sensor containing an anti-overload elastomeric structure according to claim 1, characterized in that: The square groove is matched with the guide groove, and the outer wall of the positioning block (302) is matched with the guide groove.
6. A multi-axis force sensor containing an anti-overload elastomeric structure according to claim 2, characterized in that: The end section of the damping rotating shaft (3062) is T-shaped.
7. The multi-axis force sensor containing an anti-overload elastomeric structure according to claim 1, characterized in that: The buffer assembly (5) comprises a hard ring (501), the inner wall of the hard ring (501) is fixedly connected with a rubber ring (502), the inner wall of the rubber ring (502) is in contact with the outer wall of the elastic member (4), and the outer wall of the hard ring (501) is fixedly connected with a limiting plate (503).
8. A multi-axis force sensor containing an anti-overload elastomeric structure according to claim 7, characterized in that: The outer walls of the hard ring (501) and the rubber ring (502) are both provided with circular holes.
9. A multi-axis force sensor containing an anti-overload elastomeric structure according to claim 7, characterized in that: The bottoms of the hard ring (501) and the rubber ring (502) are both provided with support grooves.
10. A multi-axis force sensor containing an anti-overload elastomeric structure according to claim 7, characterized in that: The inner wall of the limiting plate (503) is detachably mounted on the inner bottom of the base (2) through bolts.