CN218211355U - Resistance adjusting device of proximity switch - Google Patents

Abstract

The utility model discloses a resistance adjusting device of a proximity switch, which belongs to the field of laser resistance adjusting equipment and comprises a machine body, a resistance adjusting device and a clamp, wherein the resistance adjusting device and the clamp are arranged on the machine body; the machine body is provided with a controller which is electrically connected with the resistance regulator and the proximity switch and is used for receiving the sensing signal of the proximity switch and controlling the resistance regulator to be closed according to the sensing signal of the proximity switch. The method and the device have the effects of reducing the damage rate of the proximity switch in the debugging process and improving the debugging precision of the proximity switch.

Description

Resistance adjusting device of proximity switch

Technical Field

The utility model belongs to the technical field of laser trimming and specifically relates to a proximity switch's trimming and hinders device is related to.

Background

The inductance type proximity switch mainly comprises an LC oscillator, a shaping detection circuit, an amplitude comparison circuit, an amplification output circuit and the like, a high-frequency alternating magnetic field is generated through the LC oscillator, when a metal target is close to an induction surface of the proximity switch, an eddy current effect is generated in the metal target due to electromagnetic induction, and oscillation is stopped after oscillation is attenuated until an induction distance is reached along with the enhancement of the eddy current effect. The oscillation change of the oscillator is detected by an amplitude detection circuit, and the amplitude of the oscillation is compared with a voltage value set by a comparison circuit and then is converted into a switch output signal by an amplification circuit, so that the function of non-contact detection is achieved.

However, due to the fact that the sensing distance is determined to be deviated and exceeds the qualified range due to the discreteness of parameters of electronic components and the inconsistency of product assembly, the compensation resistor of the proximity switch is modified in the production process so as to achieve the purpose of adjusting the sensing distance of the proximity switch. The conventional proximity switch usually adopts a potentiometer as a compensation resistor, the resistance value of the potentiometer is debugged by using a screw driver so as to achieve the required resistance parameter, and the inventor thinks that the potentiometer is easily damaged when the screw driver is used for adjusting the potentiometer.

SUMMERY OF THE UTILITY MODEL

In order to reduce the damage rate of a proximity switch in the debugging process and improve the debugging precision of the proximity switch, the application provides a resistance trimming device of the proximity switch.

A resistance adjusting device of a proximity switch comprises a machine body, a resistance adjusting device and a clamp, wherein the resistance adjusting device and the clamp are arranged on the machine body, the clamp is used for fixedly mounting the proximity switch, a compensation resistor of the proximity switch adopts a laser cutting resistor, and the resistance adjusting device is used for performing laser cutting on the laser cutting resistor; the machine body is provided with a controller which is electrically connected with the resistance regulator and the proximity switch and is used for receiving the sensing signal of the proximity switch and controlling the resistance regulator to be closed according to the sensing signal of the proximity switch.

Through adopting above-mentioned technical scheme, change into radium cutting resistance through the compensation resistance with proximity switch, reduce proximity switch's manufacturing cost, adopt the mode that the resistance trimming was carried out radium cutting to radium cutting resistance to radium cutting simultaneously to replace the original mode that adopts the screwdriver to carry out the debugging to the potentiometre, under the control of controller, the precision of debugging is more controllable, and the resistance trimming can not damage radium cutting resistance, has accelerated the speed of debugging simultaneously.

Preferably, the controller comprises a terminal connected with the proximity switch and a detection control circuit, the detection control circuit comprises a switch tube with a control end coupled with the terminal and a first relay, and a controlled switch of the first relay is connected in series in the resistor adjusting power supply loop.

By adopting the technical scheme, the controller is connected with the proximity switch, the proximity switch is not only a debugged main body but also a sensing end for the controller to execute control, and the sensing signal of the proximity switch controls the resistor adjusting device through the setting of the control circuit.

Preferably, a control unit is arranged in a power supply loop of the resistor regulator, the control unit comprises a point control button and a second relay, the point control button, an excitation coil of the second relay and a controlled switch of the first relay are connected in series, and the controlled switch of the second relay is connected with the point control button in parallel.

By adopting the technical scheme, the control unit is arranged to realize the control of the starting of the resistance regulator.

Preferably, the controller is connected with a display, a camera is arranged on the resistance adjusting device and used for shooting the installation of the proximity switch on the clamp, the camera is electrically connected with the display, and the display is used for displaying pictures shot by the camera.

By adopting the technical scheme, the display and the camera are arranged, so that an operator can conveniently observe the installation position of the proximity switch.

Preferably, the clamp comprises a fixing plate, a testing plate and a jig, the fixing plate is used for being fixedly installed on the machine body, the fixing plate is provided with a plurality of installation holes, and the testing plate is installed on the fixing plate through the installation holes; the test board is provided with a micrometer, one end of the micrometer screw rod of the micrometer facing the jig is provided with an induction sheet, the jig is used for installing a proximity switch, and after the proximity switch is installed, the induction end of the proximity switch faces one side of the micrometer.

Through adopting above-mentioned technical scheme, the tool is used for installing proximity switch, sets up the micrometer on surveying the board and sets up on the micrometer through responding to the piece, realizes the more accurate regulation of interval between proximity switch and the response piece.

Preferably, the mounting holes are divided into at least two types with different sizes.

By adopting the technical scheme, the model selection range of the debugged proximity switch by the resistance trimming device is expanded by setting the type of the mounting hole.

Preferably, the fuselage is provided with height adjustment mechanism, the resistance adjusting device sets up on height adjustment mechanism, height adjustment mechanism is used for driving the resistance adjusting device and reciprocates.

By adopting the technical scheme, the height change of the resistor trimming device is facilitated by arranging the height adjusting mechanism, so that the height requirement required by the resistor trimming device when the resistor trimming device debugs the proximity switches of different models is met.

Preferably, height adjusting mechanism sets up the accommodate the lead screw in the erection column including inside erection column and the vertical rotation that is the cavity setting, accommodate the lead screw's one end coaxial fixation has adjusting hand wheel, adjusting hand wheel is located the erection column outside, accommodate the lead screw threaded connection has the regulation seat, the erection column is provided with the spout, adjust the seat part and stretch out the erection column through the spout, the resistance regulator is installed and is stretched out in the part of erection column in the regulation seat.

Through adopting above-mentioned technical scheme, it is rotatory to drive accommodate the lead screw through adjusting handle to realize adjusting the position change of seat on accommodate the lead screw, through setting up the spout, restrict the circumferential direction of adjusting the seat, thereby make the seat of adjusting can only follow accommodate the axis direction removal of lead screw.

In summary, compared with the way of adjusting the resistance of the potentiometer by using the screw batch, the way of adjusting the resistance of the laser resistor by using the resistance adjuster is more convenient and controllable, the stability of the laser resistor is better than that of the potentiometer, the cost of the laser resistor is lower than that of the potentiometer, the laser cutting speed is higher, the average laser cutting time is 2-4 seconds, and the adjusting time of the screw batch is about 30 seconds.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a block diagram of a controller circuit according to an embodiment of the present application;

FIG. 3 is a schematic structural view of a clamp and proximity switch of an embodiment of the present application;

FIG. 4 is a sectional view of a portion of the clamp of an embodiment of the present application;

FIG. 5 is an exploded view of a portion of the clamp structure in accordance with an embodiment of the present application;

FIG. 6 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 7 is a sectional view of a portion of the height adjustment mechanism of the embodiment of the present application.

Description of reference numerals:

1. a body; 11. a control panel; 12. a junction box; 2. a resistance regulator; 3. a clamp; 31. a fixing plate; 311. mounting holes; 32. a test board; 33. a jig; 331. mounting grooves; 332. a wire slot; 333. a threaded through hole; 34. a micrometer; 341. an induction sheet; 35. a collision component; 351. threaded plugs, 352, elastomeric members; 353. abutting against the contact; 4. a controller; 41. a terminal; 42. a detection control circuit; 43. a control unit; 5. a height adjustment mechanism; 51. mounting a column; 511. a chute; 52. adjusting the screw rod; 53. an adjusting seat; 54. adjusting a hand wheel; 6. a display; 100. a proximity switch.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

In the production of the proximity switch, people usually adopt a potentiometer as a compensation resistor of the proximity switch, a screw driver is used for screwing an adjusting contact, the average debugging time is about 30 seconds, meanwhile, the potentiometer belongs to a mechanical material, the possibility of unstable material consistency exists, and destructive risks exist when the screw driver debugs the potentiometer.

The embodiment of the application discloses a resistance adjusting device of a proximity switch. As shown in FIG. 1 and FIG. 2, during its production debugging process that is applied to proximity switch 100 that compensation resistance adopted radium to cut resistance, the resistance trimming device includes fuselage 1, sets up resistance trimming ware 2 and anchor clamps 3 on fuselage 1, and anchor clamps 3 are used for fixed mounting proximity switch 100, and resistance trimming ware 2 is used for radium to cutting compensation resistance, and in this application, resistance trimming ware 2 is laser generator. Fuselage 1 is equipped with controller 4, controller 4 electricity is connected in resistance trimming ware 2 and proximity switch 100, a response signal control resistance trimming ware 2 for receiving proximity switch 100 closes according to proximity switch 100, in the debugging process, set for proximity switch 100's response distance, thereby carry out radium to radium cutting resistance through opening the laser generator and cut the resistance increase that makes radium cutting resistance, when the resistance of compensation resistance reaches the resistance parameter that the response distance that proximity switch 100 set for corresponds, proximity switch 100 output response signal, thereby make resistance trimming ware 2 close and stop radium cutting, in order to reach the purpose of adjusting proximity switch 100 response distance.

Referring to fig. 1 and 2, a control panel 11 electrically connected to the resistor adjuster 2 and the controller 4 is provided on the body 1, and an operator can press a control button on the control panel 11 to control debugging, and a power supply (not shown) for supplying power to the resistor adjuster 2 and the controller 4 is provided in the body 1. The controller 4 comprises a terminal 41 connected with the proximity switch 100 and a detection control circuit 42, wherein the terminal 41 is plugged with the proximity switch 100 and is used for acquiring the sensing signal output by the proximity switch 100. For the plug of proximity switch 100 wiring when making things convenient for proximity switch 100 to debug, the fixed wiring board 12 that is provided with on fuselage 1, wiring end 41 sets up on wiring board 12, and wiring board 12 still is equipped with power supply end and earthing terminal, and wiring board 12 corresponds wiring end 41, power supply end and earthing terminal and sets up with different colours to in the grafting position of the wiring that proximity switch 100 corresponds can be known fast to the person of detecting.

Referring to fig. 1 and 2, the detection control circuit 42 controls the resistor 2 according to the sensing signal obtained from the terminal 41, and includes a switching tube Q and a first relay KM-1, where the control end of the switching tube Q is coupled to the terminal 41, the switching tube Q includes but is not limited to an NPN type triode, a PNP type triode, an NMOS tube, a PMOS tube, and the like, and the switching tube Q is shown as an NPN type polar tube in this application. The excitation coil of the first relay KM-1 is connected in series between the collector of the switching tube Q and a power supply, and the protective resistor R is connected in series between the emitter of the switching tube Q and the ground; the controlled switch of the first relay KM-1 is connected in series in a power supply loop of the resistor regulator 2, in the application, the controlled switch of the first relay KM-1 is a normally closed switch, and if a PNP type triode is adopted, the controlled switch of the first relay KM-1 is a normally open switch. When the switching tube Q receives a high-level signal output by the terminal 41, the switching tube Q is switched on, and at this time, the excitation coil of the first relay KM-1 is energized, so that the normally closed switch is switched off, the power supply loop of the resistor regulator 2 is in an open circuit state, and at this time, the resistor regulator 2 is switched off; in the present application, the proximity switch 100 is not only an object to be debugged, but also an induction input end of the controller 4, and the turning-off control of the resistor adjuster 2 is realized through the induction of the proximity switch 100, so as to improve the accuracy of the induction control.

Referring to fig. 1 and 2, in order to ensure that the turning-on of the resistor adjuster 2 can be manually controlled, the controller 4 further includes a control unit 43 disposed in the power supply loop of the resistor adjuster 2, and the control unit 43 includes a point control button K and a second relay KM-2, where the point control button K is disposed on the control panel 11. The point control button K, the excitation coil of the second relay KM-2 and the controlled switch of the first relay KM-1 are connected in series, the controlled switch of the second relay KM-2 is connected with the point control button K in parallel, and the controlled switch of the second relay KM-2 is a normally-off switch. When the point control switch is pressed down, as the controlled switch of the first relay KM-1 is a normally closed switch, the power supply loop of the resistor regulator 2 is conducted at the moment, the excitation coil of the second relay KM-2 is electrified to close the controlled switch of the second relay KM-2, and the resistor regulator 2 is kept in an electrified state under the action of the second relay KM-2. When the excitation coil of the first relay KM-1 is powered on, the controlled switch of the first relay KM-1 is disconnected, the power supply loop of the resistor regulator 2 is in an open circuit state, the excitation coil of the second relay KM-2 is powered off, the controlled switch of the second relay KM-2 is disconnected, the resistor regulator 2 stops working, and the resistor regulator 2 is started again only after the point control button K is pressed down again. The controller 4 may also be a PLC controller 4, which controls the operation of the regulator 2 by means of a software program.

Referring to fig. 1 and 3, anchor clamps 3 include fixed plate 31, survey test panel 32 and tool 33, and fixed plate 31 fixed mounting is on the mesa of fuselage 1, is provided with a plurality of mounting holes 311 on the fixed plate 31, and mounting hole 311 is the screw hole, surveys test panel 32 and installs on fixed plate 31 through the cooperation of bolt with the screw hole, and tool 33 can install on surveying test panel 32 also can install on fixed plate 31, and when proximity switch 100's model is different, need to change tool 33 and survey test panel 32. For facilitating the trimming device to debug the proximity switches 100 of different models, the mounting hole 311 is divided into at least two models of different sizes, so that the mounting can be adapted to the various different types of bolts required for mounting the test board 32 and the jig 33.

Referring to fig. 3 and 4, the micrometer 34 is installed on the test board 32, the micrometer screw of the micrometer 34 is disposed toward one side of the fixture 33, and the micrometer screw is disposed toward the fixture 33 and has a sensing piece 341, after the proximity switch 100 is installed on the fixture 33, the sensing end of the proximity switch 100 is disposed toward the sensing piece 341, when the sensing piece 341 is located within the sensing range of the proximity switch 100, the proximity switch 100 outputs a sensing signal, and when the proximity switch 100 is located outside the sensing range of the proximity switch 100, the proximity switch 100 does not output a sensing signal. The micrometer housing of the micrometer 34 is fixedly connected to the test board 32, and the operator can indirectly adjust the sensor 341 and the proximity switch 100 by rotating the coarse adjustment knob and/or the fine adjustment knob; the principle of this application device is promptly for confirming proximity switch 100's sensing distance, places response piece 341 in proximity switch 100 established response scope upper limit distance department, through the resistance value of resistance trimming ware 2 adjustment radium cutting resistance to make proximity switch 100 can sense the existence of response piece 341, thereby realize the control to proximity switch 100 sensing distance.

Referring to fig. 3 and 4, in order to make the placement position of the proximity switch 100 in the fixture 33 remain stable each time, the top of the fixture 33 is provided with a mounting groove 331 for mounting the proximity switch 100, when the proximity switch 100 is placed in the mounting groove 331, an outer wall of one end of the proximity switch 100, which is far away from the sensing piece 341, abuts against a side wall of the mounting groove 331, so that the distance between the sensing end of the proximity switch 100 and the sensing piece 341 is kept constant after the proximity switch 100 is placed in the fixture 33. In order to guarantee that resistance trimming device 2 can be better aim at radium cutting resistance, proximity switch 100 is located and has at least one side outer wall to contradict with the lateral wall that mounting groove 331 corresponds in the outer wall of response end both sides, and in this application, the size of mounting groove 331 and proximity switch 100's size phase-match. For guaranteeing that proximity switch 100's outer wall can be better contradict with mounting groove 331's lateral wall, tool 33 corresponds proximity switch 100's wiring and is provided with wire casing 332, wire casing 332 and mounting groove 331 intercommunication to make proximity switch 100's wiring can wear out tool 33 through wire casing 332, the position of seting up of wire casing 332 corresponds with the position that sets up of proximity switch 100 wiring, in this application, wire casing 332 sets up and keeps away from micrometer 34 one end in mounting groove 331.

Referring to fig. 3 and 5, in order to ensure the stability of the proximity switch 100 mounted on the jig 33 in the laser cutting process, the jig 33 is provided with a collision component 35, the collision component 35 is disposed on one side of the mounting groove 331 and perpendicular to the sensing direction of the sensing piece 341, and the collision component 35 collides with the outer wall of the proximity switch 100 to keep the outer wall pressed by the proximity switch 100 attached to the side wall of the mounting groove 331. The jig 33 is provided with a screw through hole 333 communicated with the mounting groove 331, the abutting assembly 35 comprises a screw plug 351 in screw connection with the screw through hole 333 and an abutting head 353 for abutting against the outer wall of the proximity switch 100, an elastic member 352 is connected between the screw plug 351 and the abutting head 353, and two ends of the elastic member 352 are respectively fixed on the screw plug 351 and the abutting head 353. In the present application, the elastic member 352 is a spring, when the elastic member 352 is in a natural state, the contact 353 partially extends out of the threaded through hole 333 and is located in the mounting groove 331, and when the elastic member 352 is compressed, the contact 353 can be completely accommodated in the threaded through hole 333; by using the elastic potential energy of the elastic member 352, the proximity switch 100 has a tendency of moving towards the side far away from the collision component 35 under the collision of the collision head 353, so that the outer wall of the proximity switch 100 is attached to the inner wall of the installation groove 331. Conflict subassembly 35 can be a set of also can be the multiunit, sets up according to the lateral wall length that conflict subassembly 35 contradicted with proximity switch 100, and in this application, conflict subassembly 35 demonstrates with a set of.

Referring to fig. 3 and 5, the cross section of the abutting head 353 is in a shape like a Chinese character 'tu' along the axis thereof, and the diameter of one end of the abutting head 353 fixedly connected with the elastic member 352 is slightly smaller than that of the threaded through hole 333, so that the outer wall of the abutting head 353 is close to the inner wall of the threaded through hole 333 and is not in direct contact with the inner wall of the threaded through hole 333, the deflection degree of the abutting head 353 in the taking and placing process of the proximity switch 100 is reduced, and the deformation of the elastic member 352 is reduced. The diameter of one end, where the abutting head 353 abuts against the proximity switch 100, is smaller than that of the threaded through hole 333, and the end face, where the abutting head 353 abuts against the proximity switch 100, of one end is provided with an arc-shaped chamfer, so that resistance of the proximity switch 100 in the placing process is reduced through the chamfer, and installation of the proximity switch 100 on the jig 33 is facilitated.

Referring to fig. 3, in order to facilitate taking out the proximity switch 100 from the fixture 33, the length of the mounting groove 331 in the direction parallel to the adjustment direction of the micrometer 34 is determined, that is, the width or length of the mounting groove 331 is smaller than the width or length of the corresponding proximity switch 100 and is greater than one half of the width or length of the corresponding proximity switch 100, and whether the mounting groove 331 is the width or the length is mainly determined by whether the sensing end of the proximity switch 100 is disposed on one side of the proximity switch 100 in the width direction or one end of the proximity switch 100 in the length direction. In the present application, the sensing end of the proximity switch 100 is disposed along the length direction of the proximity switch 100, so that the length of the installation slot 331 is smaller than the length of the proximity switch 100, when the proximity switch 100 is installed in the installation slot 331, the proximity switch 100 partially extends out of the installation slot 331, that is, the sensing end of the proximity switch 100 is located outside the installation slot 331, and when the proximity switch 100 needs to be taken out, the proximity switch 100 can be taken out from the sensing end of the proximity switch 100; meanwhile, the length of the mounting groove 331 is greater than one half of the length of the proximity switch 100, so that the proximity switch 100 can be kept in a horizontal state when being mounted in the jig 33, and the inclination of the proximity switch 100 is reduced.

Referring to fig. 6 and 7, in order to facilitate the height adjustment of the resistance regulator 2 according to the model of the proximity switch 100, the body 1 is provided with a height adjusting mechanism 5, and the resistance regulator 2 is arranged on the height adjusting mechanism 5 and is driven by the height adjusting mechanism 5 to move up and down. The height adjusting mechanism 5 comprises a mounting column 51 and an adjusting screw rod 52, wherein the mounting column 51 is arranged in a cavity, the adjusting screw rod 52 is vertically and rotatably arranged in the mounting column 51, the adjusting screw rod 52 is in threaded connection with an adjusting seat 53, the resistance adjustor 2 is arranged on the adjusting seat 53, and when the adjusting screw rod 52 rotates, the adjusting seat 53 moves up and down along the axis direction of the adjusting screw rod 52. In order to facilitate the rotation of the adjusting screw rod 52, an adjusting hand wheel 54 is coaxially fixed at one end of the adjusting screw rod 52 far away from the machine body 1, the adjusting hand wheel 54 is positioned outside the mounting column 51, and the adjusting screw rod 52 is rotated by rotating the adjusting hand wheel 54, so that the height adjustment of the adjusting seat 53 is realized.

Referring to fig. 6 and 7, in order to ensure that the adjusting screw 52 rotates, the adjusting seat 53 can only move along the axial direction of the adjusting screw 52, the mounting post 51 is provided with a sliding slot 511, part of the adjusting seat 53 extends out of the mounting post 51 through the sliding slot 511, the resistance regulator 2 is arranged on the part of the adjusting seat 53 extending out of the sliding slot 511 of the mounting post 51, and in order to ensure the installation stability of the resistance regulator 2, the number of the sliding slots 511 is two in the present application; meanwhile, the rotation of the adjusting seat 53 is limited by the sliding groove 511, so that the vertical up-and-down movement of the adjusting seat 53 is realized.

Referring to fig. 6 and 7, a display 6 is installed on one side of the installation column 51 far away from the resistance regulator 2, the controller 4 is connected with the display 6, a camera (not shown) is carried on the resistance regulator 2 and used for shooting the installation of the proximity switch 100 on the clamp 3 and mainly used for shooting the position of the laser cutting resistor after the proximity switch 100 is installed, the camera in the application adopts an industrial camera, and the display 6 is electrically connected with the camera and used for displaying pictures shot by the camera. When an operator can clearly see the laser resistor on the display 6, the operator can perform laser cutting on the laser resistor by controlling the resistor adjustor 2.

The working process of the resistance adjusting device of the proximity switch disclosed by the embodiment of the application is as follows: the corresponding test board 32 and the corresponding jig 33 are selected according to the model of the proximity switch 100 and are installed on the fixing plate 31, and the micrometer 34 is adjusted according to the sensing range of the proximity switch 100, so that the distance between the sensing piece 341 and the sensing end of the proximity switch 100 can be at the upper limit of the sensing distance of the proximity switch 100, and the height of the resistor adjuster 2 is adjusted according to the model of the proximity switch 100. Next, the proximity switches 100 to be debugged are sequentially placed in the installation groove 331, and during installation, an operator needs to push the proximity switches 100 by hand until the outer walls of the proximity switches abut against the side walls of the installation groove 331, and press the proximity switches 100 downward, so that the bottoms of the proximity switches 100 contact with the bottom surface of the installation groove 331. After proximity switch 100 installation is accomplished, the operator can watch radium and cut the resistance in display 6 after, the operator pegs graft the wiring of proximity switch 100 in proper order on wiring platform 12, treat proximity switch 100 circular telegram back, press point accuse button K again and start transfer resistor 2 and carry out radium and cut radium to radium and cut the resistance, when radium cuts the resistance value of resistance and reaches the value that the product needs, proximity switch 100 outputs sensing signal, detect control circuit 42 and close according to received sensing signal control transfer resistor 2 this moment, thereby realize proximity switch 100's response range's adjustment. After the laser cutting is finished, the wiring is pulled out of the wiring platform 12, the proximity switch 100 is taken out, the next proximity switch 100 to be debugged is replaced, and the operation steps are repeated. Generally, the positions of the micrometer 34 and the resistor 2 do not need to be adjusted in the debugging process, the adjustment is carried out at the initial debugging time, and the readjustment is carried out when the proximity switch 100 of the next model needs to be replaced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A resistance adjusting device of a proximity switch is characterized in that: the laser cutting machine comprises a machine body (1), a resistor adjuster (2) and a clamp (3), wherein the resistor adjuster (2) and the clamp (3) are arranged on the machine body (1), the clamp (3) is used for fixedly mounting a proximity switch (100), a compensation resistor of the proximity switch (100) adopts a laser cutting resistor, and the resistor adjuster (2) is used for performing laser cutting on the laser cutting resistor; the body (1) is provided with a controller (4), and the controller (4) is electrically connected with the resistor adjuster (2) and the proximity switch (100) and is used for receiving a sensing signal of the proximity switch (100) and controlling the resistor adjuster (2) to be closed according to the sensing signal of the proximity switch (100).

2. A resistance trimming apparatus for a proximity switch as defined in claim 1, wherein: the controller (4) comprises a terminal (41) connected with the proximity switch (100) and a detection control circuit (42), wherein the detection control circuit (42) comprises a switch tube with a control end coupled to the terminal (41) and a first relay, and a controlled switch of the first relay is connected in series in a power supply loop of the resistor regulator (2).

3. A trimming device for a proximity switch according to claim 2, wherein: the power supply loop of the resistor regulator (2) is provided with a control unit (43), the control unit (43) comprises a point control button and a second relay, the point control button, an excitation coil of the second relay and a controlled switch of the first relay are connected in series, and the controlled switch of the second relay is connected with the point control button in parallel.

4. A resistance trimming apparatus for a proximity switch as defined in claim 1, wherein: the controller (4) is connected with a display (6), a camera is arranged on the resistance adjusting device (2) and used for shooting the installation of the proximity switch (100) on the clamp (3), the camera is electrically connected with the display (6), and the display (6) is used for displaying pictures shot by the camera.

5. A trimming device for a proximity switch according to claim 1, wherein: the fixture (3) comprises a fixing plate (31), a testing plate (32) and a jig (33), the fixing plate (31) is used for being fixedly installed on the machine body (1), the fixing plate (31) is provided with a plurality of installing holes (311), and the testing plate (32) is installed on the fixing plate (31) through the installing holes (311); micrometer (34) are installed to survey test panel (32), micrometer (34) micrometer screw rod is equipped with response piece (341) towards the one end of tool (33), tool (33) are used for installing proximity switch (100), proximity switch (100) installation back, proximity switch (100)'s response end sets up towards micrometer (34) one side.

6. A trimming device for a proximity switch according to claim 5, wherein: the mounting holes (311) are at least divided into two types with different sizes.

7. A resistance trimming apparatus for a proximity switch as defined in claim 1, wherein: the machine body (1) is provided with a height adjusting mechanism (5), the resistance regulator (2) is arranged on the height adjusting mechanism (5), and the height adjusting mechanism (5) is used for driving the resistance regulator (2) to move up and down.

8. A resistance trimming apparatus for a proximity switch as defined in claim 7, wherein: height adjusting mechanism (5) are erection column (51) and the vertical adjusting screw (52) that set up in erection column (51) of rotating that the cavity set up including inside, the one end coaxial fixation of adjusting screw (52) has adjusting hand wheel (54), adjusting hand wheel (54) are located the erection column (51) outside, adjusting screw (52) threaded connection has regulation seat (53), erection column (51) are provided with spout (511), it stretches out erection column (51) through spout (511) to adjust seat (53) part, resistance trimming ware (2) are installed and are stretched out on the part of erection column (51) in regulation seat (53).

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