CN217112154U

CN217112154U - Iron chip detection head for sealing groove of clamp body

Info

Publication number: CN217112154U
Application number: CN202121250653.7U
Authority: CN
Inventors: 王志欣; 旬平安; 章彩琴; 黄灿洪
Original assignee: Zhejiang Asia Pacific Mechanical and Electronic Co Ltd
Current assignee: Zhejiang Asia Pacific Mechanical and Electronic Co Ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2022-08-02
Anticipated expiration: 2031-06-04

Abstract

The utility model discloses a pincers body seal groove iron fillings detection head. The probe comprises a conductor probe part and a non-conductor engineering plastic piston part which move mutually and are in insulation disconnection with a piston shell; the conductor measuring head part comprises a measuring head, a measuring head spring, a measuring head compression spring, an adjusting rod, an adjusting bolt, a check bolt, a power-on spring and a signal line fixing bolt; the middle of the detection head is provided with a power-on spring to ensure that the signal wire can be screwed down and can be conducted with the detection head, and an electric signal of the detection head is led out. The utility model is used for solve the inside bits inspection problem of depositing of volume production part inslot, reduce product cost, conveniently use equipment on, and simple, easily realize the low price.

Description

Iron chip detection head for sealing groove of clamp body

Technical Field

The utility model relates to a detection device and structure inside the braking caliper body, especially, a batch conductor groove class processing bits class detection head for braking caliper body has been related to.

Background

The brake caliper body has three grooves inside for the requirement of working characteristics. The sealing groove is very important, but in daily brake caliper body processing, due to the change of caliper body materials and material components and the change of processing conditions, when the sealing groove is processed, scrap iron is clamped in the sealing groove, and the scrap iron cannot be cleaned out through conventional cleaning and blowing, so that brake fluid leakage can be caused after the product is assembled, the brake is bad, and accidents are caused. In addition to improving the processing conditions, improving the raw material component ratio, grinding and cutting the cutter groove by the cutter blade, modifying the processing procedure and the like, the sealing groove is checked before assembly to ensure that the product is 100 percent qualified, so as to prevent the accident. At present, the main method for inspecting the sealing groove of the clamp body is manual work, but due to the fact that the manual work has visual fatigue, the inspection is easy to miss after long-time work. Secondly also detect with imaging device, this raises the efficiency greatly, but finds in the practical application if the pincers body zinc-plating back, when iron fillings and pincers body background colour extremely unanimous, the false retrieval can appear in the camera, judges the product that contains iron fillings qualified. In addition, the detection camera needs to be specially made because the detection camera needs to extend into the cylinder hole of the clamp body, and a set of detection camera is expensive.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the prior art, the utility model designs a detect the special detection head of the inside iron fillings of pincers body seal groove, simply dispose PLC control, just can realize semi-automatic detection, can ensure product quality like this, raise the efficiency, also can practice thrift the cost.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model discloses a gauge head, piston, gauge head spring, gauge head pressure spring, gauge head adjusting lever, piston adjusting ring, gauge head adjusting nut, gauge head locknut, piston body fixation nut, piston adjusting nut, piston body, piston spring and piston housing.

The piston shell is internally provided with an installation channel, the head part of the installation channel is internally provided with a piston body, the tail part of the installation channel is internally provided with a piston body fixing nut, the piston body fixing nut is installed in a threaded hole at the tail part of the installation channel through threads, and the head end surface of the piston body fixing nut is connected to the tail end surface of the piston body so as to tightly press the piston body on the step surface at the head part of the installation channel; the piston body is hollow and provided with a piston, the inner peripheral surface of the head part of the piston body is provided with an inner flange, the outer peripheral surface of the piston in the piston body, which is close to the head part, is provided with an outer flange, and the outer flange of the piston is connected to the inner flange of the piston body; a piston adjusting nut is sleeved between the tail of the piston and the tail of the piston body, the piston adjusting nut is installed in a threaded hole in the tail of the piston body through threads, a piston locknut is installed in a central threaded hole of a piston body fixing nut through threads, and the head end face of the piston locknut is connected to the tail end face of the piston adjusting nut to tightly press the piston adjusting nut on the step face of the inner wall of the tail of the piston body; a piston spring and a piston adjusting ring are arranged in an annular gap between the piston body and the piston, which is positioned between the piston adjusting nut and the piston outer flange, the piston adjusting ring is in contact connection with the end surface of the head of the piston adjusting nut, two ends of the piston spring are respectively connected with the piston outer flange and the piston adjusting ring, and the tail part of the piston is in clearance fit with the piston adjusting nut;

the piston is internally provided with a cavity, a measuring head adjusting rod, a measuring head adjusting nut and a measuring head check nut are sequentially arranged in the cavity from the head to the tail of the piston, an inner flange is arranged on the inner peripheral surface of the head of the piston, an outer flange is arranged on the outer peripheral surface of the tail end of the measuring head in the piston, a measuring head spring is sleeved outside the measuring head in the piston, the stepped surface of the head end of the outer flange is connected with the stepped surface of the tail end of the inner flange of the piston through the measuring head spring, the tail end surface of the outer flange of the measuring head is connected with the head end surface of the measuring head adjusting rod through a measuring head compression spring, and the tail end surface of the measuring head adjusting rod is connected with the head end surface of the measuring head adjusting nut; the measuring head adjusting nut is installed in a threaded hole in the tail of the piston through threads, the measuring head locknut is installed in a central threaded hole of the piston through threads, and the head end face of the measuring head locknut is connected to the tail end face of the measuring head adjusting nut so as to limit the measuring head adjusting nut in the piston; and the measuring head locknut is provided with a power-on spring, and the power-on spring is arranged in a hole formed in the end face of the measuring head locknut through a wire fixing bolt.

The measuring head, the measuring head compression spring, the measuring head adjusting rod and the measuring head adjusting nut are all metal pieces and are sequentially and electrically connected, the measuring head end extends out of the piston and then is used for electrically contacting scrap iron in the sealing groove, the measuring head adjusting nut is electrically connected with the power-on spring, and the power-on spring is connected with an external signal receiving circuit through a signal line.

And the measuring head check nut is provided with a measuring head check screw.

The through hole is formed in the outer side wall of the piston shell outside the middle of the piston body, the through hole is communicated with the installation channel, the fastening screw is installed in the through hole, and the fastening screw penetrates through the through hole and then is tightly pressed and connected to the outer wall of the piston body to axially tightly press and fix the piston body.

An air inlet hole is formed in the outer side wall of the piston shell outside the step face of the inner flange of the piston body, the air inlet hole is communicated with an air source through an air pipe, an annular groove is formed in the outer side wall of the piston body at the step face of the inner flange of the piston body, a plurality of air channels are formed in the annular groove at intervals along the circumference and communicated to the gap between the inner flange of the piston body and the outer flange of the piston, the gap is communicated to the annular groove through the air channels, and the annular groove is communicated with the air source through the air inlet hole.

And a piston body sealing ring is arranged between the piston body and the inner wall of the installation channel to be in sealing connection, and the piston body sealing ring is used for sealing gas entering the piston.

And a piston sealing ring is arranged between the piston and the inner wall of the piston body to be in sealing connection, and the piston sealing ring plays a role in sealing when the piston moves.

The utility model has the advantages that:

the utility model discloses a technical scheme, not only can solve the volume production part inslot portion and deposit bits inspection problem to can reduce product cost.

The utility model discloses a groove type processing bits detects head, on conveniently using equipment, and simple, easy realization, the price is low.

Drawings

The invention will be further described with reference to the accompanying drawings and specific embodiments:

FIG. 1 is a sectional view of the structure of the present invention;

FIG. 2 is a schematic view of the present invention with an air inlet;

FIG. 3 is a schematic diagram of the M-M structure of FIG. 2;

FIG. 4 is a schematic diagram of the detection of the position of scrap iron in the sealing groove;

fig. 5 is a schematic view of the overall detection arrangement of the present invention.

In the figure: the measuring head comprises a measuring head 12, a piston 13, a measuring head spring 14, a measuring head compression spring 15, a measuring head adjusting rod 16, a piston adjusting ring 17, a measuring head adjusting nut 18, a measuring head locknut 19, a measuring head lockscrew 20, an energizing spring 21, an electric wire fixing bolt 22, a piston locknut 23, a piston body fixing nut 24, a piston adjusting nut 25, a piston body 26, a piston spring 27, a piston shell 28, a piston body sealing ring 29 and a piston sealing ring 30; fastening screw 105, signal line 106, air pipe 107.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the iron chip detecting head includes a measuring head 12, a piston 13, a measuring head spring 14, a measuring head hold-down spring 15, a measuring head adjusting rod 16, a piston adjusting ring 17, a measuring head adjusting nut 18, a measuring head locknut 19, a piston locknut 23, a piston body fixing nut 24, a piston adjusting nut 25, a piston body 26, a piston spring 27 and a piston housing 28; in fig. 1, the left side is a head side, the right side is a tail side, and the piston housing 28, the piston body 26 and the piston 13 are coaxially arranged and are sequentially sleeved from outside to inside. The piston housing 28 is in locating engagement with the piston body 26 and is secured therein.

A mounting channel is arranged in the piston shell 28, a piston body 26 is arranged in the head part of the mounting channel, a piston body fixing nut 24 is arranged in the tail part of the mounting channel, the piston body fixing nut 24 is tightly installed in a threaded hole in the tail part of the mounting channel through threads, and the head end surface of the piston body fixing nut 24 is connected to the tail end surface of the piston body 26 to tightly press the piston body 26 on the step surface of the head part of the mounting channel; a piston body sealing ring 29 is arranged between the piston body 26 and the inner wall of the installation channel for sealing connection, and the piston body sealing ring 29 is used for sealing the gas entering the piston.

The piston body 26 is hollow and is provided with a piston 13, a piston sealing ring 30 is arranged between the piston 13 and the inner wall of the piston body 26 for sealing connection, and the piston sealing ring 30 plays a sealing role when the piston moves left and right. An inner flange is arranged on the inner peripheral surface of the head of the piston body 26, an outer flange is arranged on the outer peripheral surface of the piston 13 close to the head in the piston body 26, the outer diameter of the outer flange of the piston 13 is larger than the inner diameter of the inner flange of the piston body 26, the outer flange of the piston 13 is tightly pressed and connected to the inner flange of the piston body 26, and the step surface of the head end of the outer flange of the piston 13 is tightly pressed and connected with the step surface of the tail end of the inner flange of the piston body 26; piston seal rings 30 are arranged between the outer wall of the piston 13 and the inner wall of the inner flange of the piston body 26 and between the outer wall of the outer flange of the piston 13 and the inner wall of the piston body 26 for sealing connection.

A piston adjusting nut 25 is sleeved between the tail of the piston 13 and the tail of the piston body 26, the piston adjusting nut 25 is screwed and installed in a threaded hole at the tail of the piston body 26 through threads, a piston locknut 23 is screwed and installed in a central threaded hole of a piston body fixing nut 24 through threads, and the head end face of the piston locknut 23 is connected to the tail end face of the piston adjusting nut 25 so as to tightly press the piston adjusting nut 25 on a step face arranged on the inner wall at the tail of the piston body 26; the piston body fixing nut 24 fixes the piston body 26 to the inner position of the piston housing 28, and the piston locknut 23 is used for the locking function of the piston adjusting nut 25.

A piston spring 27 and a piston adjusting ring 17 are arranged in an annular gap between a piston body 26 positioned between the piston adjusting nut 25 and the outer flange of the piston 13 and the piston 13, the piston adjusting ring 17 is connected to the end surface of the head of the piston adjusting nut 25 in a contact manner, the piston spring 27 is sleeved outside the piston 13, and two ends of the piston spring 27 are respectively connected with the outer flange of the piston 13 and the piston adjusting ring 17; the tail part of the piston 13 is movably sleeved in a central hole of the piston adjusting nut 25, and the tail part of the piston 13 is in clearance fit with the piston adjusting nut 25; the piston spring 27 is a working spring which presses the piston 13 into the extreme working position of the head end.

A cavity is arranged in the piston 13, a measuring head 12, a measuring head adjusting rod 16, a measuring head adjusting nut 18 and a measuring head locknut 19 are sequentially arranged in the cavity from the head to the tail of the piston 13, a piston sealing ring 30 is arranged between the piston 13 and the inner wall of the piston body 26 for sealing connection, an inner flange is arranged on the inner peripheral surface of the head of the piston 13, an outer flange is arranged on the outer peripheral surface of the tail end of a measuring head 12 in a piston 13, the outer diameter of the outer flange of the measuring head 12 is larger than the inner diameter of the inner flange of the piston 13, a measuring head spring 14 is sleeved outside the measuring head 12 in the piston 13, the step surface of the head end of the outer flange of the measuring head 12 is connected with the step surface of the tail end of the inner flange of the piston 13 through the measuring head spring 14, the tail end surface of the outer flange of the measuring head 12 is connected with the head end surface of a measuring head adjusting rod 16 through a measuring head pressing spring 15, the measuring head pressing spring 15 is connected between the measuring head 12 and the measuring head adjusting rod 16, and the tail end surface of the measuring head adjusting rod 16 is connected with the head end surface of a measuring head adjusting nut 18 in a pressing mode.

The measuring head adjusting nut 18 is screwed and installed in a threaded hole in the tail of the piston 13 through threads, the measuring head locknut 19 is screwed and installed in a central threaded hole of the piston 13 through threads, and the head end face of the measuring head locknut 19 is connected to the tail end face of the measuring head adjusting nut 18 so as to limit the measuring head adjusting nut 18 in the piston 13; a step surface is arranged at the position, close to the tail, of the piston 13 and used for axial limiting movement of the measuring head adjusting nut 18;

the measuring head locknut 19 is provided with an energizing spring 21, the energizing spring 21 is arranged in a hole formed in the end face of the measuring head locknut 19 through a wire fixing bolt 22, and the energizing spring 21 is used for leading out an electric signal of the measuring head. The energizing spring 21 plays a role in transferring electric signals, and the electric wire fixing bolt 22 fastens the signal wire to the anti-loosening bolt, so that the signal wire is not loosened and does not fall off, and good signals are ensured.

The measuring head 12, the measuring head compression spring 15, the measuring head adjusting rod 16 and the measuring head adjusting nut 18 are all metal pieces and are sequentially and electrically connected, the head end of the measuring head 12 extends out of the piston 13 and then is used for electrically contacting iron chips in the sealing groove, the measuring head adjusting nut 18 is electrically connected with the electrifying spring 21, the electrifying spring 21 is connected with an external signal receiving circuit through a signal line 106, and then the measuring head 12 is electrically contacted with the signal of the iron chips in the sealing groove to be led out and detected.

The utility model discloses a gauge head 12 is insulating with other parts, does not switch on, only switches on with circular telegram spring 21 after gauge head pressure spring 15, gauge head adjusting lever 16, gauge head adjusting nut 18 in proper order. The signal line 106 is a copper wire having an outer insulating rubber diameter of about 0.5, and is connected to an electrical system to provide signal control.

The utility model discloses at the inside circular telegram spring 21 that is equipped with of electric wire fixing bolt, guarantee to switch on with the gauge head, can compress tightly the electric wire again.

The gauge head check nut 19 is provided with a gauge head check screw 20. The measuring head check nut 19 and the side head adjusting bolt 18 can be prevented from loosening under the action of friction force, the measuring head check screw 20 is screwed into the check nut 19 for further preventing the check nut 19 from loosening, and when the check screw 20 contacts the end face of the side head adjusting bolt 18, the measuring head adjusting bolt 18 and the check bolt 19 are pushed to opposite directions by axial force generated by the check screw 20, so that double safety function is achieved.

The measuring head locknut 19 is a nonconductor fine-tooth thread bolt, and 4 evenly distributed thread small holes are arranged at the tail end and used for locking and fixing the electric wire.

From this the utility model discloses a locking except that two bolt frictional force locks of gauge head 12 still is provided with locking screw and increases the axial force locking.

A through hole is formed in the outer side wall of the piston shell 28 outside the middle of the piston body 26 and is communicated with the installation channel, a fastening screw 105 is installed in the through hole, and the fastening screw 105 penetrates through the through hole and is tightly pressed and connected to the outer wall of the piston body 26 to axially tightly press and fix the piston body 26.

As shown in fig. 2 and 3, an air inlet hole is formed in the outer side wall of the piston housing 28 outside the step surface of the inner flange of the piston body 26, the air inlet hole is communicated with an air source through an air pipe 107, an annular groove is formed in the outer side wall of the piston body 26 at the step surface of the inner flange of the piston body 26, a plurality of through air channels are formed in the annular groove at intervals along the circumference, the through air channels are communicated with the gap between the inner flange of the piston body 26 and the outer flange of the piston 13, the gap is communicated with the annular groove through the air channels, and the annular groove is communicated with the air source through the air inlet hole. The piston body seal ring 29 and the piston seal ring 30 are respectively arranged on both sides of the air inlet hole. The air channel of the annular groove is a three-way small hole and is communicated with the air inlet hole, so that the air inlet is ensured to be uniform.

And an air source is filled into the annular groove and is filled into a gap between the inner flange of the piston body 26 and the outer flange of the piston 13 through an air channel, so that the piston 13 moves towards one end far away from the piston 13, the piston 13 is driven to retract, and the iron scrap detection head is taken out from the sealing groove.

When the air source is inflated, the measuring head 12 is retracted into the piston 13, and the scrap iron detecting head is taken out of the sealing groove; when the air source is not inflated, the measuring head 12 extends out of the piston 13 to detect the iron chips in the sealing groove.

In a specific embodiment, the piston body seal ring 29 and the piston seal ring 30 are both O-ring seals.

The piston 13 is non-conductive. The diameters of piston shafts at two ends of the piston are different. The center of the piston is provided with a hole.

The measuring head 12 mainly detects whether the seal groove of the caliper body has iron chips, is a wear-resistant conical head arranged in the piston and can move in a telescopic mode. The gauge head force of the gauge head 12 is adjusted by using both the gauge head spring 14 and the gauge head hold-down spring 15 in cooperation. When the measuring head 12 meets resistance, the measuring head 12 is driven to retract, and needle breakage, head breakage and breakage of the measuring head 12 are prevented.

The stylus adjustment lever 16 is used to fine tune the measurement of the stylus 12 and the adjustment of the amount of retraction force, and can be lengthened or shortened as desired. In particular to a T-shaped circular polish rod, and the size can be modified when the measuring head is adjusted.

The measuring head adjusting nut 18 is used for finely adjusting the extending length of the measuring head 12, and the measuring head adjusting nut 18 is screwed into the head of the piston 13 more, so that the measuring head 12 extends out of the piston 13 for more length.

The piston adjusting ring 17 is used to adjust the retraction distance of the piston 13 (here, the retraction amount is designed to be 10 mm MAX), and can be lengthened or shortened. The piston adjusting nut 25 adjusts the retraction stroke and the air pressure of the piston 13.

The above components of the present invention are installed in the piston body 26, and then the piston housing 28 is installed, except for the piston body fixing nut 24 and the piston locknut 23. The piston body fixing bolt 24 is a bolt having fine threads inside and outside.

The utility model discloses have conductor gauge head part and non-conductor engineering plastics piston part, both can the motion each other after the atress, both all install inside the piston of dividing the non-conductor, and with other piston bodies, the piston housing is in insulation breaking.

The conductor measuring head part comprises a measuring head, a measuring head spring, a measuring head pressing spring, an adjusting rod, an adjusting bolt, a locking bolt, a power-on spring and a signal line fixing bolt.

The non-conductor engineering plastic piston part comprises a piston 13 and a measuring head loosening bolt 19.

The utility model discloses a locknut has used the non-conductor plastics preparation, prevents to switch on. The utility model discloses the centre sets up an circular telegram spring to ensure that the signal line is screwed up and can switch on with detecting the head again. In addition, the non-conductor piston can move left and right on the piston body due to the fact that the piston adjusting bolt and the piston check bolt are provided with gaps of 0.1-0.15mm, a boss is arranged at the front part of the piston, a gap of 0.2-0.3 mm is formed between the front part of the piston and the piston body, and the gaps are communicated with the air inlet holes.

As shown in fig. 4 and 5, the present invention is implemented to detect the iron chips in the sealing groove of the washed pliers body. The pincers body washes the back through water etc. and tiny iron fillings are washed away very easily, can not stay in the seal groove of the pincers body, and the size is close to the iron fillings that the seal groove slot width can block and can't be washed away in the seal groove, and the utility model discloses it is close, the iron fillings of card in the seal groove to detect this size and seal groove slot width.

The sealing groove of the pliers body is a groove which is arranged inwards in the pliers body.

During measurement, a measuring head 12 of the scrap iron detecting head extends out of a piston 13 and then extends into a sealing groove of the washed clamp body, and the scrap iron detecting head moves once along the arrangement direction of the sealing groove, so that scrap iron in the sealing groove can be detected. If the sealing groove is annular, the sealing groove moves for a circle along the annular circumference of the sealing groove.

In the real-time movement process of the measuring head 12 along the clamp body sealing groove, if the measuring head 12 contacts iron filings, the potential/level of the measuring head 12 changes, an electric signal led out by the power-on spring 21 through the signal line 106 changes, and then the change of the electric signal led out by the power-on spring 21 can be detected to detect whether the iron filings exist and the position of the iron filings existing in the clamp body sealing groove.

The measuring head 12 can detect and obtain which positions in the sealing groove are reserved with the iron chips after moving along the arrangement direction of the sealing groove once.

When the device is installed:

first, the gauge head spring 14 is loaded into the piston from the right.

Secondly, the piston is filled with grease from the right with the probe 12.

Thirdly, the pressure-measuring spring 15 and the gauge head adjusting rod 16 are fitted into the piston from the right.

Fourthly, the measuring head adjusting bolt 18 is screwed to the right part of the piston and adjusted, the measuring head is exposed for 5mm, and when the measuring head is required to be pressed by hands, the measuring head retracts and extends out without blocking.

Fifthly, the locknut 19 is installed and tightened at the right end of the piston by a small two-leg wrench, and then the lockscrew 20 is screwed into a screw hole and tightened.

Sixthly, the dense O-shaped sealing ring is greased and then is installed on the piston. And finishing the installation of the piston assembly.

Seventh, the small O-ring 30 is greased into the groove on the left side of the piston body 26, and then the piston body is greased around the piston assembly completed in the sixth step.

Eighth, the piston spring 27 and the piston adjusting ring 17 are fitted into the piston body from the right.

Ninth, the piston adjusting bolt 25 is screwed to the right part of the piston body and adjusted, and when the piston is required to be pressed by hand, the piston retracts and extends without being blocked.

Tenth, the piston body packing 29 is fitted into the piston body left groove. And is packed into the piston case 28 after being greased as a whole, the piston body fixing bolt 24 is screwed in to press the piston body, and then the piston check bolt 23 is screwed into the piston body fixing bolt 24 to be locked.

Eleventh, the fastening bolt 105 and the air pipe joint are screwed into the piston housing to press the piston body.

Twelfth, the above-mounted components are screwed into the head of the measuring rod 31, the energizing spring 21 is fitted into the screw hole at the rear side of the locknut for the measuring head, and then the electric wire is fastened with the electric wire fastening bolt.

The utility model discloses the theory of operation of detecting the head is:

as can be seen in fig. 1, the probe 12 is separated from the other components by an insulating member, is not in communication with the other components, and is only in communication with the intermediate energizing spring. When the electric wire is electrified, the signal electricity can be transmitted to the head measuring part and is not conducted with other parts.

As can be seen from figures 4 and 5, because the measuring head and the wall of the product groove are provided with a gap, the gap is the thickness of the material scraps to be detected, when the material scraps exist, the measuring head can touch the material scraps, the potential of the measuring head 12 can change to form a passage, and the machine can detect the material scraps and stop the machine for alarming immediately.

In addition to the above preferred embodiments, the present invention has other embodiments, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope defined by the appended claims.

Claims

1. The utility model provides a pincers body seal groove iron fillings detection head which characterized in that: the measuring head adjusting device comprises a measuring head (12), a piston (13), a measuring head spring (14), a measuring head compression spring (15), a measuring head adjusting rod (16), a piston adjusting ring (17), a measuring head adjusting nut (18), a measuring head locknut (19), a piston locknut (23), a piston body fixing nut (24), a piston adjusting nut (25), a piston body (26), a piston spring (27) and a piston shell (28);

an installation channel is arranged in the piston shell (28), a piston body (26) is arranged in the head of the installation channel, a piston body fixing nut (24) is arranged in the tail of the installation channel, the piston body fixing nut (24) is installed in a threaded hole in the tail of the installation channel through threads, and the head end face of the piston body fixing nut (24) is connected to the tail end face of the piston body (26) to tightly press the piston body (26) on the step face of the head of the installation channel; the piston body (26) is hollow and is provided with a piston (13), the inner peripheral surface of the head part of the piston body (26) is provided with an inner flange, the outer peripheral surface of the piston (13) close to the head part in the piston body (26) is provided with an outer flange, and the outer flange of the piston (13) is connected to the inner flange of the piston body (26); a piston adjusting nut (25) is sleeved between the tail of the piston (13) and the tail of the piston body (26), the piston adjusting nut (25) is installed in a threaded hole in the tail of the piston body (26) through threads, a piston locknut (23) is installed in a central threaded hole of a piston body fixing nut (24) through threads, and the head end face of the piston locknut (23) is connected to the tail end face of the piston adjusting nut (25) to tightly press the piston adjusting nut (25) on the step face of the inner wall of the tail of the piston body (26); a piston spring (27) and a piston adjusting ring (17) are arranged in an annular gap between a piston body (26) and a piston (13) between a piston adjusting nut (25) and an outer flange of the piston (13), the piston adjusting ring (17) is connected to the end face of the head of the piston adjusting nut (25) in a contact manner, two ends of the piston spring (27) are respectively connected with the outer flange of the piston (13) and the piston adjusting ring (17), and the tail of the piston (13) is in clearance fit with the piston adjusting nut (25);

a cavity is arranged in the piston (13), a measuring head (12), a measuring head adjusting rod (16), a measuring head adjusting nut (18) and a measuring head check nut (19) are sequentially arranged in the cavity from the head to the tail of the piston (13), an inner flange is arranged on the inner peripheral surface of the head of the piston (13), an outer flange is arranged on the outer peripheral surface of the tail end of the measuring head (12) in the piston (13), a measuring head spring (14) is sleeved outside the measuring head (12) in the piston (13), the head end step surface of the outer flange of the measuring head (12) is connected with the inner flange tail end step surface of the piston (13) through the measuring head spring (14), the tail end surface of the outer flange of the measuring head (12) is connected with the head end surface of the measuring head adjusting rod (16) through a measuring head pressing spring (15), and the tail end surface of the measuring head adjusting rod (16) is connected with the head end surface of the measuring head adjusting nut (18); the measuring head adjusting nut (18) is installed in a threaded hole in the tail of the piston (13) through threads, the measuring head locknut (19) is installed in a central threaded hole of the piston (13) through threads, and the head end face of the measuring head locknut (19) is connected to the tail end face of the measuring head adjusting nut (18) to limit the measuring head adjusting nut (18) in the piston (13); an energizing spring (21) is arranged on the measuring head locknut (19), and the energizing spring (21) is arranged in a hole formed in the end face of the measuring head locknut (19) through a wire fixing bolt (22).

2. The iron scrap detection head for the sealing groove of the caliper body according to claim 1, wherein:

the measuring head comprises a measuring head (12), a measuring head compression spring (15), a measuring head adjusting rod (16) and a measuring head adjusting nut (18), wherein the measuring head (12), the measuring head compression spring (15), the measuring head adjusting rod (16) and the measuring head adjusting nut (18) are all metal pieces and are electrically connected in sequence, the head end of the measuring head (12) stretches out of scrap iron in a piston (13) and then is used for electrically contacting with a sealing groove, the measuring head adjusting nut (18) is electrically connected with a power-on spring (21), and the power-on spring (21) is connected with an external signal receiving circuit through a signal line (106).

3. The iron scrap detection head for the sealing groove of the caliper body according to claim 1, wherein:

and a measuring head check screw (20) is arranged on the measuring head check nut (19).

4. The iron scrap detection head for the sealing groove of the caliper body according to claim 1, wherein:

a through hole is formed in the outer side wall of the piston shell (28) outside the middle of the piston body (26), the through hole is communicated with the installation channel, a fastening screw (105) is installed in the through hole, the fastening screw (105) penetrates through the through hole and then is tightly pressed and connected to the outer wall of the piston body (26), and the piston body (26) is axially tightly pressed and fixed.

5. The iron scrap detection head for the sealing groove of the caliper body according to claim 1, wherein:

an air inlet hole is formed in the outer side wall of the piston shell (28) outside the step face of the inner flange of the piston body (26), the air inlet hole is communicated with an air source through an air pipe (107), an annular groove is formed in the outer side wall of the piston body (26) at the step face of the inner flange of the piston body (26), a plurality of air channels are formed in the annular groove at intervals along the circumference and communicated into a gap between the inner flange of the piston body (26) and the outer flange of the piston (13), the gap is communicated with the annular groove through the air channels, and the annular groove is communicated with the air source through the air inlet hole.

6. The iron scrap detection head for the sealing groove of the caliper body according to claim 1, wherein:

a piston body sealing ring (29) is arranged between the piston body (26) and the inner wall of the installation channel for sealing connection, and the piston body sealing ring (29) is used for sealing the gas entering the piston.

7. The iron scrap detection head for the sealing groove of the caliper body according to claim 1, wherein:

and a piston sealing ring (30) is arranged between the piston (13) and the inner wall of the piston body (26) to be connected in a sealing way, and the piston sealing ring (30) plays a sealing role when the piston moves.