High-precision column type sensor structure with dust cover

Abstract

The utility model relates to the technical field of column type sensors, in particular to a high-precision column type sensor structure with a dust cover, which comprises a sensor, the sensor comprises an elastic piece, a protective shell is arranged outside the elastic piece, and the top of the elastic piece upwards penetrates through the protective shell and is connected with a first dust-proof assembly. And a second dustproof assembly is arranged between the first dustproof assembly and the top surface of the protective shell. According to the utility model, the first dustproof assembly is connected with the elastic piece and wraps the upper part of the protective shell, and the first diaphragm is arranged to prevent dust from entering the dustproof cover from the space between the dustproof cover and the shell; a second dustproof assembly is arranged, and the side surface of the elastic piece is wrapped by a second diaphragm, so that dust can be prevented from entering the sensor from a gap between the elastic piece and the top cover; through the arrangement of the deviation correction assembly, when the stress on the sensor is not uniform, the deformation quantity of each second strain gauge is different, the deviation condition of the stress can be reflected, data is provided for the position adjustment of the sensor, and thus the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of columnar sensors, in particular to a high-precision columnar sensor structure with a dust-proof cover. Background Art

[0002] Columnar sensors are measuring elements widely used in the field of industrial control. Its structure mainly includes parts such as a housing, an elastic element, and a measuring unit. The working principle of the columnar sensor is that when the elastic body is deformed under the action of gravity, it is converted into an electrical signal through the strain gauges pasted on the elastic body. The cross-section of the elastic body of the columnar sensor is designed with a reduced part to generate sufficient strain, so as to obtain accurate measurement results.

[0003] Since the elastic element deforms when subjected to an external force, there will be a gap between the elastic element and the outer shell to meet the need for the elastic element to expand and contract. External dust and the like easily enter the sensor interior from the gap, affecting the measurement accuracy of the strain gauges. In addition, the columnar sensor may have deficiencies in the ability to resist lateral and eccentric loads, and the non-coincidence of the center of gravity of the measured object and the axis of the elastic element will affect the measurement results. Summary of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a high-precision columnar sensor structure with a dust-proof cover.

[0005] The technical solution of the utility model is as follows:

[0006] A high-precision columnar sensor structure with a dust-proof cover, comprising:

[0007] A sensor, the sensor includes an elastic member, several strain gauges are evenly arranged on the middle side of the elastic member, the strain gauges are used to detect the deformation amount of the elastic member, a protective shell is arranged outside the elastic member, a first dust-proof component is connected upward through the top of the protective shell at the top of the elastic member, and a second dust-proof component is arranged between the first dust-proof component and the top surface of the protective shell;

[0008] The first dust-proof component includes a force-receiving disc, the force-receiving disc is fixedly installed on the top surface of the elastic member, an external dust-proof component is fixedly installed on the outer side of the bottom surface of the force-receiving disc through a clamping plate, and the external dust-proof component wraps the top of the outer side of the protective shell;

[0009] The second dust-proof component includes a second diaphragm, the second diaphragm is fixedly installed on the top surface of the protective shell and wraps the side surface of the elastic member, a deviation correction component is arranged above the second diaphragm, and the deviation correction component abuts against the bottom surface of the clamping plate.

[0010] Preferably, the protective shell includes a base, an outer shell is fixedly installed on the outer side of the top surface of the base, a top cover is fixedly installed on the top surface of the outer shell, and the elastic member penetrates upward through the center of the top cover.

[0011] Preferably, a stud is provided in the middle of the top surface of the base, a connecting plate is provided at the bottom of the elastic member, and the connecting plate is fixedly connected to the stud.

[0012] Preferably, the external dust-proof component includes a dust-proof cover, the bottom of the dust-proof cover wraps the upper part of the housing, and a first diaphragm is provided between the bottom of the dust-proof cover and the outer side of the upper part of the housing.

[0013] Preferably, a counterbore is provided in the middle of the force-receiving plate, a fixing screw is provided in the counterbore, the fixing screw passes through the force-receiving plate and is threadedly connected to the elastic member, and a plurality of connecting threaded holes are uniformly provided on the top surface of the force-receiving plate and outside the counterbore.

[0014] Preferably, the deviation rectifying component includes a pressing plate, the bottom surface of the pressing plate abuts against the second diaphragm, and the pressing plate is fixedly connected to the top cover.

[0015] Preferably, a plurality of second elastic members are uniformly provided on the top surface of the pressing plate, the top surfaces of the second elastic members abut against the clamping plate, and second strain gauges are provided on the sides of the second elastic members away from the elastic member.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] In the present utility model, the first dust-proof component is connected to the elastic member and wraps the upper part of the protective shell. By providing the first diaphragm, dust is prevented from entering the interior of the dust-proof cover from between the dust-proof cover and the housing; by providing the second dust-proof component, the side surface of the elastic member is wrapped by the second diaphragm, which can prevent dust from entering the interior of the sensor from the gap between the elastic member and the top cover; by providing the deviation rectifying component, when the sensor is unevenly stressed, the deformation amounts of each second strain gauge are different, which can reflect the deviation of the force, providing data for the adjustment of the sensor position, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the sensor structure in the present utility model;

[0020] Figure 3 is a schematic diagram of the first dust-proof component structure in the present utility model;

[0021] Figure 4 is a schematic diagram of the second dust-proof component structure in the present utility model.

[0022] The meanings of the various reference numerals in the drawings are as follows:

[0023] 1. Sensor; 11. Base; 12. Stud; 13. Housing; 14. Top cover; 15. Elastic member; 16. Connecting plate; 17. Strain gauge;

[0024] 2. The first dust-proof component; 21. Stress plate; 22. Counterbore; 23. Fixing screw; 24. Connecting threaded hole; 25. Dust-proof cover; 26. Clamping plate; 27. First diaphragm;

[0025] 3. The second dust-proof component; 31. Second diaphragm; 32. Pressure plate; 33. Second elastic member; 34. Second strain gauge. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] Embodiment 1:

[0029] Please refer to Figures 1-4 , and the present invention details the above technical solutions through the following embodiments:

[0030] A high-precision columnar sensor structure with a dust-proof cover, comprising:

[0031] Sensor 1, sensor 1 includes an elastic member 15, four strain gauges 17 are evenly pasted on the middle side of the elastic member 15, a protective shell is provided outside the elastic member 15, the top of the elastic member 15 penetrates upward through the protective shell and is connected to a first dust-proof component 2, and a second dust-proof component 3 is provided between the first dust-proof component 2 and the top surface of the protective shell.

[0032] The elastic member 15 is made of a metal material. When the elastic member 15 is subjected to an external force, it will deform. The strain gauge 17 is used to detect the amount of deformation of the elastic member 15. The strain gauge 17 adopts a well-known resistance strain gauge. When deforming, the resistance will change predictably. Measuring the resistance change can reflect the magnitude of the external force.

[0033] The protective case includes a base 11. An outer shell 13 is fixedly installed on the outer side of the top surface of the base 11 by screws. A top cover 14 is fixedly installed on the top surface of the outer shell 13 by screws. An elastic member 15 penetrates upward through the center of the top cover 14.

[0034] The base 11, the outer shell 13, and the top cover 14 are all made of stainless steel material to provide protection for the strain gauge 17 and the elastic member 15. There is a gap between the elastic member 15 and the top cover 14 bracket.

[0035] A stud 12 is provided in the middle of the top surface of the base 11. A connection disk 16 is provided at the bottom of the elastic member 15. The connection disk 16 and the stud 12 are fixedly connected by a nut.

[0036] The first dust-proof component 2 includes a force-receiving disk 21. The force-receiving disk 21 is fixedly installed on the top surface of the elastic member 15. An external dust-proof component is fixedly installed on the outer side of the bottom surface of the force-receiving disk 21 through a clamping plate 26. The external dust-proof component wraps the top of the outer side of the protective case;

[0037] The clamping plate 26 is in a circular ring shape, and the inner diameter of the clamping plate 26 is larger than the outer diameter of the top surface of the elastic member 15. The force-receiving disk 21 is in a disk shape.

[0038] The external dust-proof component includes a dust-proof cover 25. The bottom of the dust-proof cover 25 wraps the upper part of the outer shell 13. A first diaphragm 27 is provided between the bottom of the dust-proof cover 25 and the outer side of the upper part of the outer shell 13.

[0039] The clamping plate 26 is fixedly connected to the force-receiving disk 21 by screws. The top of the dust-proof cover 25 is clamped by the clamping plate 26 and the force-receiving disk 21. The lower part of the dust-proof cover 25 is in a cylindrical shape, and the inner diameter of the dust-proof cover 25 is larger than the outer diameter of the outer shell 13.

[0040] The first diaphragm 27 is made of silicone material. The first diaphragm 27 is in a funnel shape. The edge of the first diaphragm 27 is pasted on the ground of the dust-proof cover 25. The middle of the first diaphragm 27 is inserted upward between the dust-proof cover 25 and the outer shell 13 and wraps the outer shell 13. The inner diameter of the first diaphragm 27 is smaller than the outer shell 13.

[0041] A counterbore 22 is provided in the middle of the force-receiving disk 21. A fixing screw 23 is provided in the counterbore 22. The fixing screw 23 penetrates through the force-receiving disk 21 and is threadedly connected to the elastic member 15. A plurality of connecting threaded holes 24 are uniformly provided on the top surface of the force-receiving disk 21 and outside the counterbore 22.

[0042] The connecting threaded holes 24 are used to connect to external devices. When the force-receiving disk 21 is subjected to tension or pressure, it can transmit the external force to the elastic member 15, causing the elastic member 15 to deform. At the same time, it can drive the dust-proof cover 25 to move. When the dust-proof cover 25 moves, the first diaphragm 27 can slide along the outer shell 13 to ensure sealing.

[0043] The second dust-proof component 3 includes a second diaphragm 31. The second diaphragm 31 is fixedly installed on the top surface of the protective case and wraps the side surface of the elastic member 15. A deviation correction component is provided above the second diaphragm 31, and the deviation correction component abuts against the bottom surface of the clamping plate 26.

[0044] The second diaphragm 31 is made of silica gel. When the elastic member 15 deforms, relative sliding can occur between the second diaphragm 31 and the elastic member 15 to ensure the seal between the top cover 14 and the elastic member 15. The cooperation of the second diaphragm 31 and the first diaphragm 27 can prevent external dust and other impurities from entering the sensor 1.

[0045] The deviation correction component includes a pressing plate 32. The bottom surface of the pressing plate 32 abuts against the second diaphragm 31, and the pressing plate 32 is fixedly connected to the top cover 14.

[0046] The pressing plate 32 and the top cover 14 cooperate to clamp the second diaphragm 31, which can prevent the second diaphragm 31 from generating displacement when the elastic member 15 deforms.

[0047] Four second elastic members 33 are evenly and fixedly installed on the top surface of the pressing plate 32 by screws. The top surfaces of the second elastic members 33 abut against the clamping plate 26, and second strain gauges 34 are pasted on one side of the second elastic members 33 away from the elastic member 15.

[0048] The second strain gauges 34 are resistance strain gauges, which are used to sense the deformation of the second elastic members 33 and convert the amount of deformation into a resistance change.

[0049] The pressure borne by the force-receiving disc 21 causes the elastic member 15 to deform. At the same time, the force-receiving disc 21 will evenly disperse the received pressure to the four second elastic members 33.

[0050] When the pressure direction does not coincide with the axis of the elastic member 15, the pressures received by the four elastic members 15 are different, and the amounts of deformation generated are different. Therefore, the resistance change amounts of the second strain gauges 34 are different.

[0051] According to the magnitude of the resistance change value of the second strain gauges 34, it is convenient to adjust the position of the device so that the pressure direction coincides with the axis of the elastic member 15, and the measurement accuracy of the sensor 1.

[0052] In this embodiment, when an operator uses this device, the force-receiving disc 21 bears the pressure. The pressure received by the force-receiving disc 21 can be transmitted to the elastic member 15, causing the elastic member 15 to deform. At the same time, it can drive the dust-proof cover 25 to move. When the dust-proof cover 25 moves, the first diaphragm 27 can slide along the outer shell 13 to ensure the seal.

[0053] When the elastic member 15 deforms, relative sliding can occur between the second diaphragm 31 and the elastic member 15 to ensure the seal between the top cover 14 and the elastic member 15. The cooperation of the second diaphragm 31 and the first diaphragm 27 can prevent external dust and other impurities from entering the sensor 1.

[0054] The pressure borne by the force-receiving disc 21 deforms the elastic member 15. Meanwhile, the force-receiving disc 21 evenly disperses the received pressure to the four second elastic members 33.

[0055] When the pressure direction does not coincide with the axis of the elastic member 15, the pressures received by the four elastic members 15 are different, resulting in different amounts of deformation, and thus different resistance change amounts of the second strain gauge 34.

[0056] According to the magnitude of the resistance change value of the second strain gauge 34, it is convenient to adjust the position of the device so that the pressure direction coincides with the axis of the elastic member 15, and the measurement accuracy of the sensor 1.

[0057] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision columnar sensor structure with a dust cover, characterized in that: include: A sensor (1), the sensor (1) comprising an elastic member (15), a plurality of strain gauges (17) being evenly arranged on the side of the middle portion of the elastic member (15), the strain gauges (17) being used to detect the deformation of the elastic member (15), a protective shell being arranged outside the elastic member (15), a first dustproof component (2) being connected to the top of the elastic member (15) penetrating upward through the protective shell, and a second dustproof component (3) being arranged between the first dustproof component (2) and the top surface of the protective shell; The first dustproof component (2) comprises a force-bearing disk (21), the force-bearing disk (21) is fixedly mounted on the top surface of the elastic member (15), an external dustproof component is fixedly mounted on the outer side of the bottom surface of the force-bearing disk (21) via a clamping plate (26), and the external dustproof component wraps around the outer top of the protective shell; The second dustproof component (3) comprises a second diaphragm (31), the second diaphragm (31) is fixedly mounted on the top surface of the protective shell and wraps around the side of the elastic member (15), a deviation correction component is arranged above the second diaphragm (31), and the deviation correction component abuts against the bottom surface of the clamping plate (26).

2. A high-precision columnar sensor structure with a dust cover as claimed in claim 1, characterized in that: The protective shell comprises a base (11), an outer shell (13) is fixedly mounted on the outer side of the top surface of the base (11), a top cover (14) is fixedly mounted on the top surface of the outer shell (13), and the elastic member (15) penetrates upward through the center of the top cover (14).

3. A high-precision columnar sensor structure with a dust cover as claimed in claim 2, characterized in that: A stud (12) is provided in the middle of the top surface of the base (11), and a connecting plate (16) is provided at the bottom of the elastic member (15), wherein the connecting plate (16) is fixedly connected to the stud (12).

4. A high-precision columnar sensor structure with a dust cover as claimed in claim 2, characterized in that: The external dustproof component comprises a dustproof cover (25), the bottom of the dustproof cover (25) wraps the upper part of the outer shell (13), and a first diaphragm (27) is provided between the bottom of the dustproof cover (25) and the outer side of the upper part of the outer shell (13).

5. A high-precision columnar sensor structure with a dust cover as claimed in claim 1, characterized in that: A countersunk hole (22) is provided in the middle of the force-bearing disk (21), a fixing screw (23) is provided in the countersunk hole (22), the fixing screw (23) passes through the force-bearing disk (21) and is threadedly connected to the elastic member (15), and a plurality of connecting threaded holes (24) are evenly provided on the top surface of the force-bearing disk (21) and located outside the countersunk hole (22).

6. A high-precision columnar sensor structure with a dust cover as claimed in claim 2, characterized in that: The deviation-correcting assembly comprises a pressing plate (32), the bottom surface of the pressing plate (32) abuts against the second diaphragm (31), and the pressing plate (32) is fixedly connected to the top cover (14).

7. A high-precision columnar sensor structure with a dust cover as claimed in claim 6, characterized in that: A plurality of second elastic members (33) are evenly arranged on the top surface of the pressure plate (32), the top surface of the second elastic member (33) abuts against the clamping plate (26), and a second strain gauge (34) is arranged on the side of the second elastic member (33) away from the elastic member (15).

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