Multi-dimensional force sensor with protection structure
By introducing protective mechanisms and buffer structures into the multidimensional force sensor, the problem of sensor damage due to excessive compression is solved, thus achieving protection of the sensor core and stability of the circuit, ensuring signal accuracy and current control stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-03-10
AI Technical Summary
Existing multidimensional force sensors are prone to damage to their internal core structure due to excessive compression when subjected to forces exceeding a certain value.
The system employs protective mechanisms, including anti-pressure frames, lower threaded rings, and spring dampers, to buffer and protect the core components of the sensor. Sound insulation cotton and filter frames are also installed to reduce noise interference and ensure circuit stability and signal accuracy.
It effectively protects the core components of the sensor from damage, ensures stable power supply to the circuit, reduces noise interference, and improves the accuracy of feedback signals and the stability of current control.
Smart Images
Figure CN223985804U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sensor technical field especially relates to a multi -dimensional force sensor with protection structure. BACKGROUND
[0002] Multi -dimensional force sensor, especially six -dimensional force sensor, can measure three force components (Fx, Fy, Fz) and three moment components (Mx, My, Mz) in three -dimensional space simultaneously. Its core structure usually includes elastomer, strain gauge (or piezoelectric crystal and other sensitive elements), circuit part and signal processing unit. When external force acts on elastomer, strain gauge will be deformed, thereby changing its resistance value, and then through circuit conversion and signal processing, accurate force and moment information is obtained.
[0003] Multi -dimensional force sensor can measure force and moment components in multiple directions simultaneously, and the most complete form is six -dimensional force / moment sensor, that is, the sensor capable of measuring three force components and three moment components simultaneously, and multi -dimensional force sensor is based on different measurement principles, such as resistance strain type, capacitance type, piezoresistive type, piezoelectric type, etc. Among them, resistance strain type principle is a kind of common one, which utilizes the deformation of elastic element under force, and then makes resistance strain gauge pasted on elastic element produce resistance change, and then resistance change is converted into voltage output through wheatstone bridge circuit, thereby realizing force measurement.
[0004] Multi -dimensional force sensor has the following defects: when the force received by the sensor exceeds a certain value, the internal core of the sensor will be directly over-pressed and damaged, and therefore a multi -dimensional force sensor with protection structure is proposed to solve the above problems. INVENTION CONTENTS
[0005] In order to make up for the above shortcomings, the utility model provides a multi -dimensional force sensor with protection structure, which aims at improving the problem that when the force of the sensor exceeds a certain value, the internal core of the sensor will be directly over-pressed and damaged in the prior art.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a multi -dimensional force sensor with protection structure, including sensor shell, sensor end, elastic element, the sensor shell is provided with protection mechanism, the protection mechanism is provided with auxiliary mechanism, the protection mechanism includes anti -press frame, the anti -press frame is clamped in the bottom outer wall of sensor shell, the bottom outer wall of the anti -press frame is fixedly connected with lower thread ring, the side surface outer wall of the lower thread ring is threadedly connected with lower shell, the top outer wall of the anti -press frame is fixedly connected with upper thread ring, the right side inner wall of the anti -press frame is slidably connected with mounting plate, the bottom outer wall of the mounting plate is fixedly connected with spring damper, the top outer wall of the mounting plate is fixedly connected with circuit control board.
[0007] As a further description of the above technical solution: the auxiliary mechanism includes an annular groove, which is opened in the right side outer wall of the sensor shell, the side inner wall of the annular groove is threadedly connected with a threaded frame, the side inner wall of the threaded frame is rotatably connected with a butt cylinder through a bearing, and the left side inner wall of the butt cylinder is fixedly connected with a filter frame.
[0008] As a further description of the above technical solution: the lower shell is clamped on the bottom outer wall of the pressure prevention frame, and the upper threaded ring is threadedly connected on the bottom inner wall of the sensor shell.
[0009] As a further description of the above technical solution: the side outer wall of the pressure prevention frame is provided with a concave-convex groove, and the side outer wall of the concave-convex groove is fixedly connected with a frosted pad.
[0010] As a further description of the above technical solution: the circuit control board is connected in communication with the sensor end through a transmission line.
[0011] As a further description of the above technical solution: the side outer wall of the threaded frame is provided with a silica gel groove.
[0012] As a further description of the above technical solution: the filter frame is slidingly connected on the left and right side inner walls of the pressure prevention frame, and the side outer wall of the filter frame is fixedly connected with sound-absorbing cotton.
[0013] As a further description of the above technical solution: the top outer wall of the circuit control board is attached with sound insulation cotton.
[0014] As a further description of the above technical solution: the bottom outer wall of the circuit control board is fixedly connected with a heat dissipation pad.
[0015] As a further description of the above technical solution: the sensor end is clamped on the top inner wall of the sensor shell, and the elastic element is fixedly connected on the bottom end of the sensor end.
[0016] The utility model has the advantages of the following beneficial effects:
[0017] 1、The utility model discloses a sensor core assembly is provided with lower threaded ring, pressure prevention frame, spring damper and the like structure, when the force that exceeds the numerical value is received to sensor core assembly, makes sensor core assembly contract to the pressure prevention inside and carry out the pressure protection, avoids the damage that sensor core received, and the maintenance cost is increased.
[0018] 2. In this utility model, by setting up structures such as spring dampers, the circuit control board on the mounting plate is buffered and damped to ensure the stability of the power supply voltage of the sensor and avoid current control errors caused by voltage fluctuations. By setting up sound insulation cotton to isolate the circuit control board from external noise, the stability of the feedback circuit is ensured, noise and interference are reduced, and the feedback signal can truly reflect the actual current of the excitation coil. Attached Figure Description
[0019] Figure 1 This is a schematic front view of the overall design of a multidimensional force sensor with a protective structure proposed in this utility model.
[0020] Figure 2 This is a cross-sectional schematic diagram of a multidimensional force sensor with a protective structure proposed in this utility model;
[0021] Figure 3 This is a schematic diagram of the protective structure of a multidimensional force sensor with a protective structure proposed in this utility model;
[0022] Figure 4 This is a schematic diagram of the auxiliary mechanism of a multidimensional force sensor with a protective structure proposed in this utility model.
[0023] Legend:
[0024] 1. Sensor housing; 2. Sensor end; 3. Elastic element; 4. Protective mechanism; 41. Pressure shield; 42. Lower threaded ring; 43. Lower housing; 44. Upper threaded ring; 45. Groove; 46. Mounting plate; 47. Spring damper; 48. Circuit control board; 5. Auxiliary mechanism; 51. Annular groove; 52. Threaded bracket; 53. Connecting cylinder; 54. Filter bracket. Detailed Implementation
[0025] 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.
[0026] Reference Figure 1 - Figure 3This utility model provides an embodiment of a multi-dimensional force sensor with a protective structure, including a sensor housing 1, a sensor end 2, and an elastic element 3. A protective mechanism 4 is provided on the sensor housing 1, and an auxiliary mechanism 5 is provided on the protective mechanism 4. The protective mechanism 4 includes a pressure-resistant frame 41, which is snapped onto the bottom outer wall of the sensor housing 1. The pressure-resistant frame 41 is made of alloy steel, which has high strength and good pressure resistance. A lower threaded ring 42 is fixedly connected to the bottom outer wall of the pressure-resistant frame 41, and a lower housing 43 is threadedly connected to the side outer wall of the lower threaded ring 42. An upper threaded ring 44 is fixedly connected to the top outer wall of the pressure-resistant frame 41. A mounting plate 46 is slidably connected to the right inner wall of the pressure-resistant frame 41. A spring damper 47 is fixedly connected to the bottom outer wall of the mounting plate 46. The spring damper 47 buffers and reduces vibrations on the circuit control board 48 on the mounting plate 46, ensuring stable power supply voltage for the sensor and avoiding current control errors caused by voltage fluctuations. The circuit control board 48 is fixedly connected to the top outer wall of the mounting plate 46.
[0027] Reference Figure 1 - Figure 3 The lower housing 43 is snapped onto the bottom outer wall of the pressure-resistant frame 41, and the upper threaded ring 44 is threaded onto the bottom inner wall of the sensor housing 1. The outer side wall of the pressure-resistant frame 41 has a groove 45, and a frosted pad is fixedly connected to the outer side wall of the groove 45. The circuit control board 48 is connected to the sensor end 2 through a transmission line. The top outer wall of the circuit control board 48 is fitted with sound insulation cotton. By setting the sound insulation cotton, the circuit control board 48 is isolated from external noise, ensuring the stability of the feedback circuit, reducing noise and interference, and enabling the feedback signal to truly reflect the actual current of the excitation coil. The bottom outer wall of the circuit control board 48 is fixedly connected with a heat dissipation pad. By setting the heat dissipation pad, the heat generated by the circuit control board 48 is absorbed and released and the heat dissipation is accelerated. Since excessive temperature changes will affect the performance of the strain gauge and circuit components, the heat dissipation pad is used to eliminate the error caused by temperature changes. The sensor end 2 is snapped onto the top inner wall of the sensor housing 1, and the elastic element 3 is fixedly connected to the bottom end of the sensor end 2.
[0028] Reference Figure 1 - Figure 3The auxiliary mechanism 5 includes an annular groove 51, which is formed on the right outer wall of the sensor housing 1. A threaded bracket 52 is threadedly connected to the inner side wall of the annular groove 51. A docking cylinder 53 is rotatably connected to the inner side wall of the threaded bracket 52 via a bearing. A filter bracket 54 is fixedly connected to the inner left wall of the docking cylinder 53. The filter bracket 54 is used to remove high-frequency noise and interference from the circuit control board 48, thereby improving the signal-to-noise ratio. By adding the filter bracket 54 to the power input terminal, high-frequency noise and interference in the power supply are removed, thereby improving the power quality, ensuring the stability of the feedback circuit, reducing noise and interference, and enabling the feedback signal to truly reflect the actual current of the excitation coil. A silicone groove is formed on the outer side wall of the threaded bracket 52. The filter bracket 54 is slidably connected to the inner walls of the left and right sides of the anti-pressure frame 41. Sound-absorbing cotton is fixedly connected to the outer side wall of the filter bracket 54. The sound-absorbing cotton is used to absorb and eliminate noise around the circuit control board 48, thereby reducing the noise around the circuit control board 48.
[0029] Working principle: When subjected to a large force, the sensor housing 1 and the lower housing 43 are damaged. Subsequently, the sensor end 2 is pressed into the pressure-resistant frame 41. At the same time, the sensor end 2 presses against the elastic element 3, causing the sensor end 2 and the elastic element 3 to retract into the pressure-resistant frame 41. This prevents the sensor end 2 and the circuit control board 48 from being damaged by the crushing due to the destruction of the sensor housing 1. During the use of the multi-dimensional force sensor, the vibration generated is transmitted to the spring damper 47 for buffering, reducing the violent vibration of the mounting plate 46 on the spring damper 47, thereby reducing the impact of vibration on the circuit control board 48 on the mounting plate 46. When the damaged housing needs to be replaced, the sensor housing 1 can be separated from the upper threaded ring 44 by rotating it, and the lower housing 43 can be separated from the lower threaded ring 42 for easy replacement. When the filter frame 54 fails or the components around the circuit control board 48 need maintenance, the internal components can be inspected by rotating the docking cylinder 53 to separate it from the threaded frame 52.
[0030] 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 with a protective structure, comprising a sensor housing (1), a sensor tip (2), an elastic element (3), characterized in that: The sensor shell (1) is provided with a protection mechanism (4), and the protection mechanism (4) is provided with an auxiliary mechanism (5). The protection mechanism (4) comprises a pressure-proof frame (41) which is clamped on the bottom outer wall of the sensor shell (1), the bottom outer wall of the pressure-proof frame (41) is fixedly connected with a lower threaded ring (42), the side outer wall of the lower threaded ring (42) is threadedly connected with a lower shell (43), the top outer wall of the pressure-proof frame (41) is fixedly connected with an upper threaded ring (44), the right inner wall of the pressure-proof frame (41) is slidingly connected with a mounting plate (46), the bottom outer wall of the mounting plate (46) is fixedly connected with a spring damper (47), and the top outer wall of the mounting plate (46) is fixedly connected with a circuit control board (48).
2. The multi-dimensional force sensor with protective structure according to claim 1, characterized in that: The auxiliary mechanism (5) comprises an annular groove (51) which is formed in the right outer wall of the sensor shell (1), the side inner wall of the annular groove (51) is threadedly connected with a threaded frame (52), the side inner wall of the threaded frame (52) is rotatably connected with a docking cylinder (53) through a bearing, and the left inner wall of the docking cylinder (53) is fixedly connected with a filter frame (54).
3. The multi-dimensional force sensor with protective structure according to claim 1, wherein: The lower shell (43) is clamped on the bottom outer wall of the pressure-proof frame (41), and the upper threaded ring (44) is threadedly connected on the bottom inner wall of the sensor shell (1).
4. The multi-dimensional force sensor with protective structure according to claim 1, wherein: The side outer wall of the pressure-proof frame (41) is provided with a concave-convex groove (45), and the side outer wall of the concave-convex groove (45) is fixedly connected with a frosted pad.
5. The multi-dimensional force sensor with protective structure according to claim 1, wherein: The circuit control board (48) is connected with the sensor end (2) through a transmission line.
6. The multi-dimensional force sensor with protective structure according to claim 2, wherein: The side outer wall of the threaded frame (52) is provided with a silica gel groove.
7. The multi-dimensional force sensor with protective structure according to claim 2, wherein: The filter frame (54) is slidingly connected on the left and right inner walls of the pressure-proof frame (41), and the side outer wall of the filter frame (54) is fixedly connected with sound-absorbing cotton.
8. The multi-dimensional force sensor with protective structure according to claim 1, wherein: The top outer wall of the circuit control board (48) is attached with soundproof cotton.
9. The multi-dimensional force sensor with protective structure according to claim 1, wherein: The bottom outer wall of the circuit control board (48) is fixedly connected with a heat dissipation pad.
10. The multi-dimensional force sensor with protective structure according to claim 1, wherein: The sensor end (2) is clamped on the top inner wall of the sensor shell (1), and the elastic element (3) is fixedly connected at the bottom end of the sensor end (2).