CN210773887U - Roughness inductance type sensor - Google Patents

Abstract

The utility model discloses a roughness inductance type sensor, which comprises a base body, wherein one side of the base body is detachably connected with a detection sleeve, a quick-release measuring rod device is sleeved in the detection sleeve, a magnetic core driving device installed through a precise rotating device is arranged in the base body, a force measuring adjusting device is also connected between the magnetic core driving device and the base body, a coil framework and a magnetic core are also packaged in the base body, a core hole is formed in the through coil framework, the magnetic core extends into the core hole through the magnetic core driving device, a coil groove and a coil are arranged on the coil framework around the core hole, and a binding post is also arranged on the coil framework; on the premise of ensuring the resolution ratio, the range of the sensor is increased, the sensor is more suitable for workpiece detection with a large-curvature surface, the hysteresis of the sensor is reduced through the innovative magnetic core driving device, the sensitivity of the sensor is improved, the adjustability of static force is realized, the scratch problem of the surface of a detected workpiece is solved, and the structure has the advantages of large linear range, quick disassembly and convenient replacement.

Description

Roughness inductance type sensor

Technical Field

The utility model relates to a machining product detects technical field, especially relates to a roughness inductance type sensor.

Background

The surface roughness is one of important indexes for judging whether a machined product is qualified, and the high-precision inductive displacement sensor is used for measuring the surface roughness of the product, becomes one of the cores of a precision shape metering technology, and is widely applied to the machining manufacturing industry.

At present, technical blanks exist in a plurality of high-end manufacturing processes in China, for example, the manufacturing of high-end bearings, except for the reasons of design, processing, materials, heat treatment and the like, more importantly, the detection technology of the surface roughness is laggard. In the bearing manufacturing industry, except the roughness that will utilize roughness detection apparatus to detect the bearing, still need measure the ditch camber of raceway, the roughness of inner and outer lane, and measurement accuracy requires than higher, that is to say the measuring tool needs have great measuring range, and will compromise roughness and certain profile degree simultaneously, and domestic roughness detection apparatus manufacture factory can't satisfy this demand by most, and the main problem of present domestic roughness sensor is:

1. the measuring range of the sensor is not enough, and the measuring range is generally within +/-80 mu m.

2. The diamond contact pin can scratch the surface of the workpiece to be measured easily due to large force measurement, so that the measured data is distorted.

3. The linearity of the inductor is not good, and there is a large deviation at both ends of the measuring range.

4. The supporting part of the lever is difficult, the elastic sheet is easy to generate plastic deformation, and the lever is provided with a large amount of looseness by adopting a common bearing, so that the sensor forms large hysteresis.

5. The user can not be autonomic change the survey needle subassembly, and it is loaded down with trivial details to maintain or overhaul.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a roughness inductance type sensor that the range is big, resolution ratio is high, linear range is big and static dynamometry adjustable is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: a roughness inductance type sensor comprises a base body, wherein one side of the base body is detachably connected with a detection sleeve, a quick-release measuring rod device is sleeved in the detection sleeve, a detection end of the quick-release measuring rod device extends to the outer side of the detection sleeve, a magnetic core driving device connected with the quick-release measuring rod device is arranged in the base body, the magnetic core driving device is connected to the base body through a precision rotating device, a force measurement adjusting device is further connected between the magnetic core driving device and the base body, a coil framework and a magnetic core are further packaged in the base body, a core hole penetrates through the coil framework, the magnetic core penetrates through the magnetic core driving device and extends into the core hole, coil grooves are formed in the coil framework around the core hole, coils are correspondingly filled in each coil groove, and binding posts are further arranged on the coil framework, and two ends of each coil are connected to the corresponding binding posts.

As a preferred technical scheme, the precision rotating device comprises two end bearings which are oppositely arranged, a rotating shaft is clamped between the two end bearings, the rotating shaft penetrates through the magnetic core driving device and is fixedly connected with the magnetic core driving device, two ends of the rotating shaft are respectively provided with a taper shaft tip, the taper shaft tips are in running fit with the corresponding end bearings, and mounting holes are formed in the end bearings in a penetrating mode.

According to a preferable technical scheme, the end bearing comprises a cylindrical bearing outer ring, and a ball is arranged between the inside of the bearing outer ring and the periphery of the taper shaft tip in a limiting mode.

According to the technical scheme, the quick-release measuring rod device comprises a measuring rod main body, one end of the measuring rod main body is connected with a contact pin, the other end of the measuring rod main body is fixedly connected with a quick-release elastic sheet, a bending hanging portion is arranged at the end portion of the quick-release elastic sheet, a hanging hole is formed in one side, close to the magnetic core driving device, of the bending hanging portion, and a hanging avoiding opening for containing the bending hanging portion is formed in the surface of the measuring rod main body.

As preferred technical scheme, magnetic core drive arrangement is in including fixed cover dress the outside drive block of pivot, be equipped with on the drive block and extend to the drive plate of coil skeleton below, the magnetic core runs through the drive plate spiro union sets up, still install on the drive block and extend to hang the dress and dodge intraoral connecting rod, be equipped with on the connecting rod and hold bend the dress groove of hanging of portion of hanging, it is equipped with to extend to hang the downthehole dress claw of hanging of dress to hang the dress groove surface.

According to the preferable technical scheme, the measuring rod main body is of a pipe body structure, the bending hanging portion is of a V-shaped structure, and correspondingly, the hanging groove is of a V-shaped groove.

As the preferred technical scheme, the force measurement adjusting device comprises a tension spring hanging column fixedly installed on the driving block, a tension spring adjusting column is connected to the base body above the driving block in a threaded mode, a force measurement tension spring is hung between the tension spring hanging column and the tension spring adjusting column, and tension spring adjusting threads matched with the force measurement tension spring are arranged on the surface of the tension spring adjusting column.

Preferably, the number of the coil slots is three, the coil comprises an excitation coil and two detection coils, and the excitation coil is located between the two detection coils.

According to the preferable technical scheme, the detection sleeve comprises a sleeve body, a sleeve mounting seat is fixedly connected to one side of the sleeve body, and the sleeve mounting seat is detachably mounted on the base body through a connecting bolt.

As a preferred technical scheme, the base body and the sleeve mounting seat are respectively arranged into cylindrical structures, and centering steel balls are embedded in the base body corresponding to the connecting bolts.

Since the technical scheme is used, the utility model discloses following beneficial effect has:

1. under the prerequisite of guaranteeing resolution ratio, increased the range of sensor, consequently the utility model discloses the increase of range is not with sacrificing resolution ratio and obtaining as the cost, and this kind of roughness measurement that has big camber surface of similar bearing raceway more is fit for to this kind of this sensor.

2. The key part of the sensor adopts an innovative magnetic core driving device, and the looseness between the base body and the magnetic core driving device and between internal accessories of the magnetic core driving device is eliminated, so that the hysteresis of the sensor is reduced, and the sensitivity of the sensor is improved.

3. In addition, after the magnetic core driving device is adopted, the magnetic core driving device is matched with the force measurement adjusting device, the static force formed by the detection end of the quick-release measuring rod device on the surface of the detected workpiece can be adjusted, the adjustability of the static force is realized, and the problem of scratch on the surface of the detected workpiece is solved.

4. By improving the winding mode of the coil, the linear range of the sensor is improved, and the sensitivity problem of the sensor in the whole measuring range is solved.

5. The quick-release measuring rod device can be quickly detached and conveniently replaced, and a user can complete the self-dismounting.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic sectional structure diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of a quick release measuring rod device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a magnetic core driving device according to an embodiment of the present invention;

fig. 4 is a schematic view of another directional structure of the magnetic core driving device according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a precision rotation device according to an embodiment of the present invention;

fig. 6 is a schematic circuit diagram of coils according to an embodiment of the present invention;

in the figure: 1-a substrate; 101-a buckle cover; 102-bolt hole; 2-detecting the casing pipe; 201-pipe sleeve body; 202-a cannula mount; 203-bolt holes; 3-centering the steel ball; 4-bottom cover; 5-measuring rod main body; 6-a contact pin; 7-quick-release spring plate; 8-bending the hanging part; 9-hanging holes; 10-hanging an avoidance port; 11-a drive block; 12-a drive plate; 13-a connecting rod; 14-hanging the groove; 15-hanging the claw; 16-a bearing outer race; 17-a rotating shaft; 18-taper shaft tip; 19-a ball bearing; 20-mounting holes; 21-a tension spring hanging column; 22-tension spring adjusting column; 23-a force measuring tension spring; 24-tension spring adjusting screw threads; 25-a coil former; 26-a magnetic core; 27-core pores; 28-coil slot; 29-a coil; 30-a terminal post; 31-an excitation coil; 32-detection coil.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1, the roughness inductance type sensor includes a base 1, where the base 1 is a cylindrical structure and is mainly used for packaging internal electronic components to form a package protection structure of the sensor, and a detachable buckle cover 101 may be disposed on an outer side of the base, and the base is assembled and disassembled by using a connection bolt and a bolt hole 102 (the connection bolt is omitted in fig. 1) to facilitate the assembly and maintenance of the internal components. The sensor detection structure is characterized in that a detection sleeve 2 is detachably connected to one side of the base body 1, and the detection sleeve 2 is mainly used for packaging and protecting the detection structure of the sensor. Specifically, the detection sleeve 2 includes a sleeve body 201, a sleeve mounting seat 202 is fixedly connected to one side of the sleeve body 201, the sleeve mounting seat 202 is also configured to be a cylindrical structure, and is mounted and connected to a circular end face of the base body 1, that is, bolt holes 203 are correspondingly arranged on the base body 1 and the sleeve mounting seat 202, and the sleeve mounting seat 202 is detachably mounted on the base body 1 through cooperation of connecting bolts (the connecting bolts are omitted in fig. 1) and the bolt holes 203. And a centering steel ball 3 is embedded in the bolt hole 203 on the base body 1 corresponding to the connecting bolt, the diameter of the centering steel ball 3 is 2mm, and the centering steel ball is used for adjusting and centering a jackscrew to ensure that the sleeve installation seat 202 and the base body 1 are concentrically arranged in the morning. In order to facilitate the disassembly and maintenance of internal parts, the bottom ends of the base body 1 and the sleeve mounting seat 202 can be respectively provided with a detachable bottom cover 4, so that the operation is simple and convenient. The base body 1, the sleeve mounting seat 202 and the bottom cover 4 can be formed by machining 304 stainless steel on a turning and milling linked machine tool.

As shown in fig. 1 and 2, a quick-release measuring rod device is sleeved in the detection sleeve 2, a detection end of the quick-release measuring rod device extends to the outer side of the detection sleeve 2, a magnetic core driving device connected with the quick-release measuring rod device is arranged in the base 1, and the magnetic core driving device is connected to the base 1 through a precision rotating device. Quick detach measuring staff device and the workpiece surface contact that is surveyed realize signal acquisition, and pass through magnetic core drive arrangement drive electric power part realizes the signal transformation, but quick assembly disassembly between two devices simultaneously is convenient for maintain or change quick detach measuring staff device, and the user can operate by oneself, need not to seek production or seller's assistance, consequently maintains or overhauls simply, conveniently.

Specifically, as shown in fig. 2, the quick release measuring rod device includes a measuring rod main body 5, one end of the measuring rod main body 5 is connected with a contact pin 6, the other end of the measuring rod main body 5 is welded with a quick release spring 7 through laser, the end part of the quick release spring 7 is provided with a bending hanging part 8, the bending hanging part 8 is close to one side of the magnetic core driving device is provided with a hanging hole 9, and the measuring rod main body 5 is provided with a hanging hole 10 for accommodating the bending hanging part 8. The measuring rod main body 5 is set to be of a pipe body structure, the bending hanging portion 8 is set to be of a V-shaped structure, the hanging avoiding port 10 is communicated with a pipe cavity of the measuring rod main body 5, a large enough space is formed in a matched mode, the bending structure end portion of the bending hanging portion 8 is accommodated, the bending hanging portion 8 is connected with the magnetic core driving device in a hanging mode and separated from the magnetic core driving device in a hanging mode, and the quick operability of the part of dismounting is improved.

In addition, the contact pin 6 is provided with a contact pin 6 base body 1 and a diamond tip in a quadrangular pyramid shape, and the contact pin 6 base body 1 is made of copper, so that the contact pin 6 has high strength, is not easy to damage and is durable. The quick-release elastic sheet 7 is fixed with the measuring rod main body 5 through laser welding, so that the consistency and reliability of the measuring rod main body 5 in batch production are guaranteed, and a user can autonomously and quickly and accurately replace the quick-release measuring rod device as required.

As shown in fig. 1, fig. 3 and fig. 4, magnetic core drive arrangement is in including fixed cover dress the outside drive block 11 of pivot 17, be equipped with on the drive block 11 and extend to drive plate 12 of coil skeleton 25 below, drive block 11 with drive plate 12 can set up to the integral type structure, still install on the drive block 11 and extend to hang the dress and dodge connecting rod 13 in the mouth 10, the connecting rod 13 other end plug-in to connect to just pass through locking bolt fixed in the drive block 11, be equipped with on the connecting rod 13 and hold hang dress groove 14 of portion 8 is hung in bending, because it sets up to the V-arrangement structure to bend dress portion 8 hang dress portion 14 and also set up to the V-arrangement groove 14 correspondingly hang dress groove 14 surface and be equipped with and extend to hang dress claw 15 in the dress hole 9. In the embodiment, the quick-release measuring rod device is connected with the magnetic core driving device through the matching of the bending hanging part 8, the hanging hole 9 and the hanging claw 15. During detection, the quick-release measuring rod device slides on the surface of a measured workpiece, when the surface of the measured workpiece is concave-convex, the contact pin 6 can generate displacement change, the quick-release elastic sheet 7 and the connecting rod 13 are driven to enable the driving plate 12 to generate vertical displacement, and therefore the magnetic core 26 is driven to generate displacement.

As shown in fig. 1 and 5, the precision rotation device includes two end bearings disposed opposite to each other, a rotation shaft 17 is interposed between the two end bearings, the rotation shaft 17 penetrates through the magnetic core driving device and is fixedly connected to the magnetic core driving device, two ends of the rotation shaft 17 are respectively formed with a tapered shaft tip 18, the tapered shaft tip 18 is rotatably matched with the corresponding end bearing, and a mounting hole 20 is disposed through the end bearing. Specifically, the end bearing comprises a cylindrical bearing outer ring 16, and balls 19 are arranged between the inner part of the bearing outer ring 16 and the outer periphery of the taper shaft tip 18 in a limiting manner. The bearing outer ring 16, the balls 19 and the rotating shaft 17 are matched with each other to form a bearing structure, the formed bearing structure is not provided with an inner ring structure, the balls 19 are pressed only by the tapered shaft tip 18 to play a role of an inner ring and a retainer on the bearing, and due to the arrangement of the special structure, the mounting gap and the swinging of the rotating shaft 17 can be eliminated to the greatest extent, and the swinging of the measuring rod main body 5 is ensured to be within 0.01 mm.

When the bearing outer ring 16 is installed in the base body 1 and located on two sides of the driving block 11, the bearing outer ring 16 is oppositely arranged, and the locking bolt is arranged outside the base body 1 and matched with the installation hole 20, so that the two bearing outer rings 16 are fastened. The tapering surface of tapering pivot 18 of this embodiment is formed through manual grinding, has improved the conical surface roughness, be convenient for with ball 19 cooperation forms high accuracy bearing structure, this kind of adoption does not have inner circle high accuracy bearing simultaneously, through this kind of adoption does not have inner circle high accuracy bearing 1 outside adjustment both ends the lock bolt can be adjusted two pretightning force between the bearing inner race 16, in order to eliminate bearing inner race 16 with the amount of spaciousness between the pivot 17.

As shown in fig. 1, a force measuring adjusting device is further connected between the magnetic core driving device and the base body 1. Dynamometry adjusting device including fixed mounting in extension spring hanging post 21 on the driving block 11, driving block 11 top threaded connection has extension spring to adjust post 22 on the base member 1, extension spring hanging post 21 with it is equipped with dynamometry extension spring 23 to hang between the post 22 is adjusted to the extension spring, extension spring adjust post 22 surface be equipped with dynamometry extension spring 23 complex extension spring adjusting thread 24. The extension spring is adjusted post 22 and is run through 1 threaded connection of base member sets up, is adjusting during dynamometry extension spring 23 the base member 1 outside is rotatory with the help of instruments such as screwdrivers the post 22 is adjusted to the extension spring, can pass through the extension spring is adjusted the post 22 pulling dynamometry extension spring 23 is inside or outside to be removed, thereby change the distance between 23 both ends of dynamometry extension spring, and then the adjustment the pulling force of dynamometry extension spring 23 reaches the adjustment the purpose of 6 dynamometries of contact pilotage, prevents the too big fish tail work piece surface of dynamometry of contact pilotage 6 has realized the adjustability of dynamometry.

As shown in fig. 1, a bobbin 25 and a magnetic core 26 are further enclosed in the base body 1, a core hole 27 is provided through the bobbin 25, the magnetic core 26 is provided through the magnetic core driving device and extends into the core hole 27, that is, the magnetic core 26 is provided through the driving board 12 in a threaded manner, a coil slot 28 is provided on the bobbin 25 around the core hole 27, a coil 29 is correspondingly filled in each coil slot 28, a terminal 30 is further disposed on the bobbin 25, two ends of each coil 29 are connected to the corresponding terminal 30, and the coil 29 is connected to a circuit board enclosed in the base body 1 through the terminal 30, which is well known to those skilled in the art and will not be described in detail herein. Coil skeleton 25 is the ABS and moulds plastics and forms, terminal 30 inserts need to beat after the coil skeleton 25 to glue fixedly, coil 29 is formed by adopting the enameled copper wire coiling that the line footpath is 0.04 mm.

When the contact pin 6 is displaced due to uneven surface of a workpiece in use, the driving plate 12 is driven to displace, so that the position of the magnetic core 26 in the magnetic hole is changed, measurement signals obtained by the circuit board are different, and the detection of the surface roughness of the workpiece is realized. During assembly, the perpendicularity requirement of the rotating shaft 17 and the coil 29 is 90 degrees +/-0.03 degrees, the distance requirement of the rotating shaft 17 and the coil 29 is 20mm +/-0.005 mm, and meanwhile, in order to guarantee the machining precision, the coil framework 25 can be machined by a turning and milling linkage machine tool imported from Japan and is formed in a one-step machining mode without secondary correction, so that the increase of errors is avoided.

Specifically, as shown in fig. 1 and 6, the coil slots 28 are provided in three, and the coil 29 includes an excitation coil 31 and two detection coils 32, and the excitation coil 31 is located in the middle of the two detection coils 32. In the embodiment, the inductance coil 29 is formed by three groups of coils 29, so that the precision and linearity are well guaranteed in practical use. The exciting coil 31 has a wire diameter of 0.04mm, and is wound around 800 turns, the detecting coils 32 on both sides have a wire diameter of 0.04mm, and can be wound around 1000 turns, and the magnetic core 26 as an armature component can be made of 1J50 soft magnetic alloy (such as permalloy).

The basic operating principle of the present embodiment is explained with the aid of fig. 6: a sine wave signal of about 10K is applied to PIN1, under the action of the magnetic core 26, an electromagnetic field generated on the excitation coil 31 is coupled to the two detection coils 32, the coil 29 composed of PIN1 and PIN5 is the excitation coil 31, the coil 29 composed of PIN2 and PIN3 is one detection coil 32, the coil 29 between PIN3 and PIN4 is the other detection coil 32, and when the magnetic core 26 is at the equilibrium position, the effective values of induced electromotive forces generated by the two detection coils 32 are the same; when the magnetic core 26 is shifted upwards, the effective value of the induced electromotive force between the PIN2 and the PIN3 is larger than that between the PIN3 and the PIN 4; conversely, when the magnetic core 26 is shifted downwards, the effective value of the induced electromotive force between the PIN3 and the PIN4 is larger than the effective value of the induced electromotive force between the PIN2 and the PIN3, so that the shift amount of the magnetic core 26 can be detected only by detecting the effective value of the induced electromotive force between the two detection coils 32 through the circuit board, and the detection of the surface roughness of the detected workpiece is realized, and the method is an effective value detection method; in addition, a phase-sensitive detection method is adopted, a bipolar sine wave signal is output at the end of PIN2 or PIN4, and the phase of an excitation signal is introduced into demodulation so as to calculate whether the magnetic core 26 moves upwards or downwards.

Through the technical improvement, the embodiment has the following advantages:

1. wide measuring range

Because the injection molding coil framework with the large wire groove is designed, the number of winding turns of the coil is increased, the winding mode is reasonable, the moving range of the magnetic core is enlarged, the measuring range is enlarged, and according to the actual detection condition, the measuring rod main body can be lengthened, the measuring range of the sensor can be further enlarged and can reach +/-500 micrometers.

2. High resolution

The resolution of the sensor is determined by the sensitivity of the sensor and the number of bits of the data collector. So-called sensitivity is exactly that same displacement enables the inductance and produces big variation, and then produces corresponding voltage variation, through improving sensitivity, is the utility model discloses a resolution ratio like product has improved at least 1.5 times.

3. Large linear range

When the sensor in the prior art is at the measuring range limit, the magnetic core movement has a weak cutting effect on magnetic lines, and is strong only at the center, so that the linear range is narrow, and the linear range of the sensor is 90% of the measuring range after the sensor is improved in the embodiment.

4. Small and adjustable static force

Due to the adoption of the rotating shaft with the taper, the hysteresis is reduced, and the force of the force measuring spring is greatly reduced, so that the static force measurement is also greatly reduced and can be controlled below 0.2g at minimum.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. Roughness inductance type sensor, including the base member, its characterized in that: one side of the base body is detachably connected with a detection sleeve, a quick-release measuring rod device is sleeved in the detection sleeve, the detection end of the quick-release measuring rod device extends to the outer side of the detection sleeve, a magnetic core driving device connected with the quick-release measuring rod device is arranged in the base body, the magnetic core driving device is connected to the base body through a precise rotating device, a force measuring adjusting device is connected between the magnetic core driving device and the base body, a coil framework and a magnetic core are further packaged in the base body, a core hole is formed through the coil framework, the magnetic core is arranged through the magnetic core driving device and extends into the core hole, the coil framework is provided with coil slots around the core hole, each coil slot is filled with a coil correspondingly, and binding posts are further arranged on the coil framework, and two ends of each coil are connected to the corresponding binding posts.

2. The roughness inductive sensor of claim 1, wherein: the precise rotating device comprises two end bearings which are oppositely arranged, a rotating shaft is clamped between the end bearings, the rotating shaft penetrates through the magnetic core driving device and is fixedly connected with the magnetic core driving device, two tapered shaft points are formed at two ends of the rotating shaft respectively, and the tapered shaft points are in running fit with the corresponding end bearings and penetrate through the end bearings.

3. The roughness inductive sensor of claim 2, wherein: the end bearing comprises a cylindrical bearing outer ring, and balls are arranged between the inside of the bearing outer ring and the periphery of the taper shaft tip in a limiting mode.

4. The roughness inductive sensor of claim 3, wherein: the quick-release measuring rod device comprises a measuring rod main body, one end of the measuring rod main body is connected with a contact pin, the other end of the measuring rod main body is fixedly connected with a quick-release elastic sheet, the end part of the quick-release elastic sheet is provided with a bending hanging part, the bending hanging part is close to one side of the magnetic core driving device, a hanging hole is formed in the end part of the quick-release elastic sheet, and the measuring rod main body is provided with a hanging hole for accommodating the bending hanging part on the surface.

5. The roughness inductive sensor of claim 4, wherein: magnetic core drive arrangement is in including fixed cover dress the outside drive block of pivot, be equipped with on the drive block and extend to the drive plate of coil skeleton below, the magnetic core runs through the drive plate spiro union sets up, still install on the drive block and extend to hang the dress and dodge intraoral connecting rod, be equipped with on the connecting rod and hold the dress groove of hanging of portion of hanging of bending, it is equipped with on the dress groove surface to hang and extends to hang the downthehole dress claw of hanging.

6. The roughness inductive sensor of claim 5, wherein: the measuring rod main body is of a pipe body structure, the bending hanging portion is of a V-shaped structure, and correspondingly the hanging groove is of a V-shaped groove.

7. The roughness inductive sensor of claim 5, wherein: the force measurement adjusting device comprises a tension spring hanging column fixedly installed on the driving block, a tension spring adjusting column is connected to the base body above the driving block through threads, a force measurement tension spring is hung between the tension spring hanging column and the tension spring adjusting column, and tension spring adjusting threads matched with the force measurement tension spring are arranged on the surface of the tension spring adjusting column.

8. The roughness inductive sensor of claim 1, wherein: the coil groove is equipped with threely, the coil includes excitation coil and two detection coils, excitation coil is located two the centre of detecting coil.

9. The coarseness inductive sensor of any one of claims 1 to 8, wherein: the detection sleeve comprises a sleeve body, one side of the sleeve body is fixedly connected with a sleeve mounting seat, and the sleeve mounting seat is detachably mounted on the base body through a connecting bolt.

10. The roughness inductive sensor of claim 9, wherein: the base body and the sleeve mounting seat are respectively arranged into cylindrical structures, and centering steel balls are embedded in the base body corresponding to the connecting bolts.

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