CN215448766U

CN215448766U - Screw detection equipment

Info

Publication number: CN215448766U
Application number: CN202122162025.XU
Authority: CN
Inventors: 陈亮; 朱杰志; 张杨
Original assignee: Guangzhou Yancheng Intelligent Equipment Co ltd
Current assignee: Guangzhou Yancheng Intelligent Equipment Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-01-07
Anticipated expiration: 2031-09-08

Abstract

A screw detection device comprises a supporting plate, a voltage-stabilized power supply, a motor speed reducing mechanism, a screw rod, an internal thread tube, a pressure detection mechanism, a power switch, a prompting circuit, a display circuit and a fixing mechanism; the motor reducing mechanism is arranged at the rear upper part of the supporting plate, the upper end of the screw rod is arranged below a power output shaft of the motor reducing mechanism, and the screw rod and the internal threaded pipe are arranged together; a guide pipe is arranged outside the internal thread pipe, the pressure detection mechanism is arranged below the internal thread pipe, and an ejector rod is arranged below the pressure detection mechanism; the fixing mechanism comprises a supporting cylinder and a guide cylinder, the supporting cylinder is arranged on the supporting plate, and the guide cylinder is sleeved in the supporting cylinder; the power switch, the stabilized voltage power supply, the prompt circuit and the display circuit are arranged in the electric cabinet and are electrically connected with the pressure detection mechanism, the supporting cylinder and the ejector rod. This is novel to have prevented that the screw from receiving the excessive pressure and causing the influence to the testing data, has brought the facility for the staff, and has guaranteed that the testing data is true effective. Based on the above, this novel application prospect that has.

Description

Screw detection equipment

Technical Field

The utility model relates to the technical field of detection devices, in particular to a screw detection device.

Background

The screw is a commonly used hardware fitting, and in order to ensure the production quality, a screw manufacturer generally detects the strength and quality of screws produced in each batch. In the prior art, no special screw quality detection device exists, and other large-scale pressure test devices are generally adopted for detection. When the pressure test equipment is used for detecting, the piston rod of the hydraulic oil cylinder is controlled by a PLC and the like to drive the pressure head to descend, the upper part of the screw is pressed down, and the strength value of the screw is obtained just after the screw is bent. PLC, hydraulic cylinder and oil pump structure not only structure is complicated, has shortcoming with high costs moreover.

The existing pressure testing equipment is limited by the structure, the condition that the screw is bent needs to be observed visually at any time, and when the screw is bent, the oil pump matched with the oil cylinder is manually controlled to lose power, so that the specific strength value of the screw is obtained, so that if a detector does not observe the condition that the screw is bent in time, the oil cylinder continues to apply acting force, the screw continues to be stressed and bent (for example, after the bent part of the screw contacts the supporting plate, the screw continues to be stressed and pressed, so that the acting force of the screw bearing the pressure is larger and larger), the strength value of the screw displayed by the strength meter of the pressure testing equipment is different from the actual strength value, and the detected data is distorted (larger); in order to ensure the validity of the data, the measurement needs to be performed again or for multiple times, which not only brings inconvenience to the workers, but also causes low working efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a special screw strength detection device which has the advantages of simple and compact structure and low cost, can automatically cut off a power supply of a power mechanism after a screw rod is just bent under the combined action of a related mechanism and a circuit, prevents the influence of overvoltage on detection data, and can prompt a worker through a buzzer in real time, thereby bringing convenience to the worker and ensuring that the detection data is real and effective.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a screw detection device comprises a supporting plate, a voltage-stabilized power supply, a motor speed reducing mechanism, a screw rod, an internal thread pipe, a pressure detection mechanism and a power switch, and is characterized by also comprising a prompt circuit, a display circuit and a fixing mechanism; the rear end of the supporting plate is provided with a column plate, the motor speed reducing mechanism is vertically arranged at the front upper part of the column plate, the upper end of the screw rod is arranged at the lower end of a power output shaft of the motor speed reducing mechanism, the outer side of the internal thread pipe is of a special-shaped structure, and the screw rod and the internal thread pipe are arranged together through threads; the special-shaped guide pipe is sleeved on the outer side of the internal threaded pipe, the outer side of the guide pipe is arranged in the front middle part of the column plate, the upper end of the pressure detection mechanism is arranged at the lower end of the internal threaded pipe, and the lower end of the pressure detection mechanism is provided with a push rod; the fixing mechanism comprises a supporting cylinder and a guide cylinder, the supporting cylinder is arranged on the supporting plate, the guide cylinder is provided with a fixing hole, and the guide cylinder is sleeved in the supporting cylinder; the power switch, the stabilized voltage power supply, the prompt circuit and the display circuit are arranged in the electric cabinet; one pole of the power output end of the voltage-stabilized power supply is electrically connected with the pressure detection mechanism and the power input end of the prompt circuit, and the signal output end of the pressure detection mechanism is electrically connected with the power input end of the display circuit and the ejector rod; the supporting cylinder is electrically connected with the signal input end of the prompting circuit; and the control signal input end and the control signal output end of the prompt circuit are electrically connected in series between one pole of the alternating current power supply and one of the wiring ends of the running capacitor of the motor speed reducing mechanism.

Further, a supporting cylinder and the internal thread pipe are located on a vertical plane from top to bottom, the outer diameter of the ejector rod is smaller than the inner diameter of the supporting cylinder, and the height and the inner diameter of the supporting cylinder are respectively larger than the height and the outer diameter of the testing screw.

Furthermore, the supporting cylinder is made of metal, the supporting cylinder and the supporting plate are insulated, and the inner diameter of the fixing hole of the guide cylinder is smaller than the outer diameter of the screw.

Further, the external diameter of the internal thread pipe is smaller than the internal diameter of the guide pipe, and the internal thread pipe and the lead screw are consistent in height and higher than the guide pipe.

Furthermore, the stabilized voltage supply is an AC-to-DC switching power supply module; the motor reducing mechanism is a coaxial motor gear reducer; the pressure detection mechanism is a planar pressure sensor.

Furthermore, the prompting circuit comprises a resistor, a relay, an NPN triode and a buzzer which are electrically connected, wherein the positive power input end of the relay is connected with the positive power input end of the buzzer, one end of the resistor is connected with the bases of the first NPN triode and the second NPN triode, the collector electrode of the first NPN triode is connected with the negative power input end of the relay, the collector electrode of the second NPN triode is connected with the negative power input end of the buzzer, and the emitting electrodes of the two NPN triodes are connected.

Furthermore, the display circuit comprises a voltage display meter and an adjustable resistor, and one end of the adjustable resistor is connected with the positive power supply input end of the voltage display meter.

The utility model has the beneficial effects that: the utility model is specially used for detecting the strength of the screw and has the advantages of simple and compact structure and low cost. Put the screw perpendicularly in the fixed orifices of packing element before this novel detection, then staff operates first switch control motor reduction gears through lead screw drive internal thread pipe and pressure measurement mechanism, the ejector pin is down gradually with the screw rod bending, can contact with a supporting cylinder after the screw rod is pressed, and then suggestion circuit can control motor reduction gears and lose the electricity, prevented that the screw from receiving the excessive pressure and leading to the fact the influence to the measured data, and can also look over measured data (look over the data of voltage display table then convert the bending pressure value that obtains the screw) through buzzer sound production suggestion staff in real time. This is novel to have brought the facility for the staff, and has guaranteed that the testing data is true effective. Based on the above, the novel device has a good application prospect.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, a screw detection device comprises a support plate 1, a voltage-stabilized power supply a1, a motor speed reduction mechanism M, a screw rod 2, an internal threaded pipe 3, a pressure detection mechanism RT, power switches S and S1, a prompt circuit 4, a display circuit 5 and a fixing mechanism; the periphery of the lower end of the supporting plate 1 is respectively welded with a supporting leg 101, the middle of the rear side end of the supporting plate 1 is vertically welded with a rectangular upright plate 102, a shell of a motor speed reducing mechanism M is vertically installed in the middle of the upper front end of the upright plate 102 through a screw nut, a power output shaft faces to the lower end, the upper end of a screw rod 2 is welded at the lower end of the power output shaft of the motor speed reducing mechanism M, a rectangular mechanism is arranged on the outer side of an internal threaded pipe 3, and the screw rod 2 is vertically distributed and screwed into internal threads of the internal threaded pipe 3 through external threads and is installed together with the internal threaded pipe 3; the outer side of the internal thread pipe 3 is sleeved with a guide pipe 6 with a rectangular middle part, two sides of the guide pipe 6 are respectively installed on two sides of the middle part of the upright post plate 102 through screw nuts, the lower end of the internal thread pipe 3 is positioned at the lower part of the guide pipe 6, the upper end of the pressure detection mechanism RT is installed at the lower end of the internal thread pipe 3 through the screw nuts, and the lower stress end face of the pressure detection mechanism RT is vertically provided with a cylindrical ejector rod 7 through the screw nuts; the fixing mechanism comprises a supporting cylinder 8 and a guide rubber cylinder 9, the upper end of the supporting cylinder is of an open structure, the lower end of the supporting cylinder is of a closed structure, the lower end of the supporting cylinder 8 is installed on the middle part of the supporting plate 1 through a screw and a nut, the middle part of the rubber cylinder 9 is provided with a through cylindrical fixing hole 91, and the rubber cylinder 9 is sleeved at the lower end in the supporting cylinder 8; the power switches S and S1, the stabilized voltage power supply A1, the prompting circuit 4 and the display circuit 5 are arranged on a circuit board in the electric cabinet 10.

As shown in fig. 1 and 2, the middle part of the supporting cylinder 8 and the internal threaded pipe 3 are positioned on a vertical plane from top to bottom, the outer diameter of the ejector rod 7 is smaller than the inner diameter of the supporting cylinder 8, and the height and the inner diameter of the supporting cylinder 8 are respectively larger than the height and the outer diameter of the testing screw 12. The supporting cylinder 8 is made of metal, an insulating engineering plastic plate is arranged between the lower end of the supporting cylinder 8 and the metal supporting plate 1, the supporting cylinder 8 is insulated from the metal supporting plate 1, the outer diameter of the guide rubber cylinder 9 is slightly larger than the inner diameter of the supporting cylinder 8, the inner diameter of a middle fixing hole is smaller than the outer diameter of the lower end of the screw 12, and the height of the guide rubber cylinder 9 (made of rubber) is half of that of the supporting cylinder 8. The external diameter of the internal thread pipe 3 is slightly smaller than the internal diameter of the guide pipe 6, and the internal thread pipe 3 and the lead screw 2 are consistent in height and higher than the guide pipe 6. The stabilized voltage supply A1 is a finished product of an AC-to-DC switching power supply module with the model of 220V/12V/100W; the motor reducing mechanism M is a finished product of a coaxial motor gear reducer driven by an alternating current capacitor operation type motor, the power of the motor reducing mechanism M is 2.5KW, and the rotating speed of a power output shaft is 110 revolutions per minute; the first power switch S is provided with a power input end and two power output ends, and the handles of the two power switches S and S1 are positioned outside the two openings at the front outer upper end of the electric cabinet 10. The prompting circuit comprises a resistor R1, relays K, NPN, triodes Q1 and Q2 and a buzzer B which are connected through circuit board wiring, wherein the positive power input end of the relay K is connected with the positive power input end of the buzzer B, one end of the resistor R1 is connected with bases of a first NPN triode Q1 and a second NPN triode Q2, a collector of the first NPN triode Q1 is connected with the negative power input end of the relay K, a collector of the second NPN triode Q2 is connected with the negative power input end of the buzzer B, and emitters of the two NPN triodes Q1 and Q2 are connected. The display circuit comprises a liquid crystal small-sized voltage display meter A2 and an adjustable resistor RP, a display interface of the voltage display meter A2 is positioned outside an opening in the middle of the front end of the electric cabinet 10, and one end of the adjustable resistor RP is connected with a positive power supply input end of the voltage display meter A2. The pressure detection mechanism RT is a type FYMH-P plane pressure sensor (the measuring range can reach 1 ton), and is provided with two power supply input ends 1 and 2 pins and two signal power supply output ends 3 and 4 pins (the negative electrode is grounded), the detection surfaces of the pressure detection mechanism RT are positioned at the lower ends and are subjected to different detected pressures, and the two signal output ends can output voltage signals which dynamically change between 0 and 12V.

As shown in fig. 1 and 2, the power input end 1 and the pin 2 of the regulated power supply a1 are respectively connected with the two poles of the 220V power supply through leads. One pole of the 220V alternating current power supply is connected with one end of the first power switch S through a lead. Two power output ends of the first power switch S are respectively connected with two ends of the running capacitor C of the motor reducing mechanism M through leads. The other pole of the 220V alternating current power supply is connected with one power supply input end of the motor speed reducing mechanism M through a lead. The positive electrode 3 of the power output end of the voltage-stabilized power supply A1 is connected with one end of the second power switch S1 through a lead. The other end of the second power switch S1 is connected with the pin 1 of the positive power input end of the pressure detection mechanism RT and the positive power input end of the prompt circuit positive power input end relay K through leads. The signal output end 3 pin (4 pin grounding) of the pressure detection mechanism RT is connected with the other end of the adjustable resistor RP of the positive power supply input end of the display circuit and the upper end of the outer side of the ejector rod T1(7) through leads. The negative power output end 4 pin of the voltage-stabilized power supply A1, the negative power input end 2 pin of the pressure detection mechanism RT, the negative power input end of the display circuit, the negative power input end of the display screen A3 and the negative power input end of the prompt circuit are connected through a conducting wire, and an NPN triode Q1 emitting electrode is connected with the negative power output end of the voltage-stabilized power supply A1. The outer end of the supporting cylinder T2(8) is connected with the other end of the signal input end resistor R1 of the prompting circuit through a lead. A relay K control contact end and a normally closed contact end of the prompting circuit are connected in series between one of power output ends of a first power switch S and one of wiring ends of a running capacitor C of a motor speed reducing mechanism M through a lead.

As shown in fig. 1 and 2, after the 220V ac power enters pins 1 and 2 of regulated power supply a1, pins 3 and 4 of regulated power supply a1 will output a stable dc12V power to enter the power input terminals of the pressure detection mechanism RT, the prompt circuit and the display circuit (under the premise that the power switch S1 is turned on). The utility model is specially used for detecting the strength of the screw and has the advantages of simple and compact structure and low cost. Before the novel detection, the screw 12 is vertically placed in the fixing hole 91 of the rubber cylinder (the rubber cylinder plays a role of fixing the screw, and the rubber material is convenient to replace); then the staff operates, stir the handle of first switch S left, like this 220V alternating current power supply one utmost point can get into one of them wiring end of running capacitance C of motor reduction gears M (at this moment relay K is in the state of losing power its control contact end and normally closed contact end closure), the other utmost point of 220V alternating current gets into motor reduction gears M' S power input end, then, motor reduction gears M gets electric work its power output shaft anticlockwise drive lead screw 2 and rotates, 2 external screw threads of lead screw act on the internal thread of internal thread pipe 3, internal thread pipe 3 can descend the height and promote ejector pin 7 to descend (stand pipe 6 is the ascending and descending direction of internal thread pipe 3). The screw 12 can be gradually pressed and bent when the mandril 7 descends; in the process of bending the screw 12, the stress of the screw 12 reversely acts on the stressed end face of the pressure detection mechanism RT, so that the 3-pin of the pressure detection mechanism RT can output dynamically-changed signal voltage under the action of its internal circuit to enter the positive power input end of the display screen a2, and when the pressure applied to the pressure detection mechanism RT is large, the signal voltage output to the display screen a2 is relatively large, otherwise, the signal voltage is relatively small (a user checks the data of the voltage display table and then converts the data to obtain the bending pressure value of the screw). When the screw is bent, the screw is contacted with the inner side of the supporting cylinder T2, so that signal voltage output by a pin 3 of the pressure detection mechanism RT is subjected to voltage reduction and current limitation through a resistor R1 by a metal ejector rod T1(7), a metal screw 12 and a metal supporting cylinder T2 and enters bases of NPN triodes Q1 and Q2, then the NPN triodes Q1 and Q2 are respectively conducted, after the NPN triode Q1 is conducted, a collector outputs low level to enter an input end of a negative electrode power supply of the relay K, the relay K is electrified to attract a control contact end and a normally closed contact end of the relay K to be open, and at the moment, the motor speed reduction mechanism M automatically loses power and stops working (one electrode of the 220V power supply does not enter one end of a running capacitor C of the motor speed reduction mechanism M any more); after the NPN triode Q2 is conducted, the collector outputs a low level to enter the negative power supply input end of the buzzer B, and the buzzer B is powered on to make a loud prompt sound. Through the aforesaid, after screw 12 just buckles in this novel detection, can lose the electricity by automatic control motor reduction gears M, prevented that the screw from receiving the excessive pressure and leading to the fact the influence to the measured data, and can also in real time look over measured data (look over the data of voltage display table, then convert the bending pressure value that obtains the screw) through buzzer B sound production suggestion staff. Brings convenience to workers and ensures that the detection data is real and effective. After the test, the worker shifts the handle of the second power switch S to the right, so that one pole of the 220V alternating current power supply can enter the other terminal of the running capacitor C of the motor speed reducing mechanism M, the other pole of the 220V alternating current power supply enters the power input end of the motor speed reducing mechanism M, then the motor speed reducing mechanism M is electrified to work, the power output shaft of the motor speed reducing mechanism M drives the screw rod 2 to rotate clockwise, the external thread of the screw rod 2 acts on the internal thread of the internal thread pipe 3, the internal thread pipe 3 can rise and drive the ejector rod 7 to go upward (gradually returning to the initial position to prepare for pressing the screw 12 next time), and the power switch S1 is turned off after the position is in place (and the power switch S2 is turned off, and the buzzer B does not sound any more).

As shown in fig. 1 and 2, in the present invention, a technician needs to adjust and determine the resistance value of the adjustable resistor RP before production, so that the numbers shown in the display table a2 are more intuitive and approximate to the stress bending pressure of the screw. Before the determination, the worker uses the existing standard pressure testing equipment to perform the bending test on the screws in the same batch and records a specific standard pressure value (for example 498 kg), then uses the novel screw 12 to test the screws in the same batch, when the screws are bent, the technician repeatedly adjusts the resistance value of the adjustable resistor RP, changes the voltage magnitude of the signal voltage output by the pin 3 of the pressure detection mechanism RT and input to the display screen a2 (when the resistance value of the adjustable resistor RP is adjusted to be relatively large, the acting force on the stressed end face of the pressure detection mechanism RT is relatively large, the voltage number displayed by the display screen a2 is relatively large, when the resistance value of the adjustable resistor RP is adjusted to be relatively small, the acting force on the stressed end face of the pressure detection mechanism RT is relatively small, the voltage number displayed by the display screen a2 is relatively large), when the number displayed by the voltmeter is close to the standard pressure value, the resistance value of the adjustable resistor RP is adjusted to be required (for example 4.98V, representing 498 kilograms), and then the technician disconnects the power supply and tests the resistance value of the adjustable resistor RP by using a resistance meter, wherein the measured resistance value is the standard resistance value of the adjustable resistor RP of the subsequent batch production product. Before the subsequent batch production, a technician can adjust the resistance value of the adjustable resistor RP in place in advance or replace the adjustable resistor RP with a fixed resistor with the same resistance value (without determining the resistance value of the adjustable resistor RP). In the circuit, the specification of the capacitor C is 10 mu F/400V; the models of NPN triodes Q1 and Q2 are 9013; relay K is a small relay of model DC 12V; the resistance R1 is 10K; the buzzer B is an active continuous sound buzzer alarm finished product with the model SF 12V; the model of the adjustable resistor RP is 6M (the embodiment is adjusted to 2.2M); the voltage display meter A2 is a small LCD liquid crystal display digital meter, and the 4-bit voltage digital display function thereof.

The essential features of the utility model and the advantages of the utility model have been shown and described above, it will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A screw detection device comprises a supporting plate, a voltage-stabilized power supply, a motor speed reducing mechanism, a screw rod, an internal thread pipe, a pressure detection mechanism and a power switch, and is characterized by also comprising a prompt circuit, a display circuit and a fixing mechanism; the rear end of the supporting plate is provided with a column plate, the motor speed reducing mechanism is vertically arranged at the front upper part of the column plate, the upper end of the screw rod is arranged at the lower end of a power output shaft of the motor speed reducing mechanism, the outer side of the internal thread pipe is of a special-shaped structure, and the screw rod and the internal thread pipe are arranged together through threads; the special-shaped guide pipe is sleeved on the outer side of the internal threaded pipe, the outer side of the guide pipe is arranged in the front middle part of the column plate, the upper end of the pressure detection mechanism is arranged at the lower end of the internal threaded pipe, and the lower end of the pressure detection mechanism is provided with a push rod; the fixing mechanism comprises a supporting cylinder and a guide cylinder, the supporting cylinder is arranged on the supporting plate, the guide cylinder is provided with a fixing hole, and the guide cylinder is sleeved in the supporting cylinder; the power switch, the stabilized voltage power supply, the prompt circuit and the display circuit are arranged in the electric cabinet; one pole of the power output end of the voltage-stabilized power supply is electrically connected with the pressure detection mechanism and the power input end of the prompt circuit, and the signal output end of the pressure detection mechanism is electrically connected with the power input end of the display circuit and the ejector rod; the supporting cylinder is electrically connected with the signal input end of the prompting circuit; and the control signal input end and the control signal output end of the prompt circuit are electrically connected in series between one pole of the alternating current power supply and one of the wiring ends of the running capacitor of the motor speed reducing mechanism.

2. The screw detecting device according to claim 1, wherein the supporting cylinder and the internally threaded tube are in a vertical plane from top to bottom, the outer diameter of the ejector rod is smaller than the inner diameter of the supporting cylinder, and the height and the inner diameter of the supporting cylinder are respectively larger than the height and the outer diameter of the test screw.

3. The screw detecting apparatus according to claim 1, wherein the support cylinder is made of metal, the support cylinder and the support plate are insulated from each other, and an inner diameter of the fixing hole of the guide cylinder is smaller than an outer diameter of the screw.

4. The screw detecting apparatus according to claim 1, wherein an outer diameter of the internally threaded tube is smaller than an inner diameter of the guide tube, and the height of the internally threaded tube is equal to and higher than the height of the guide tube.

5. The screw detection device of claim 1, wherein the regulated power supply is an ac to dc switching power supply module; the motor reducing mechanism is a coaxial motor gear reducer; the pressure detection mechanism is a planar pressure sensor.

6. The screw detection device of claim 1, wherein the prompting circuit comprises a resistor, a relay, an NPN triode and a buzzer, the resistor is electrically connected with the positive power input end of the buzzer, one end of the resistor is connected with the bases of the first NPN triode and the second NPN triode, the collector of the first NPN triode is connected with the negative power input end of the relay, the collector of the second NPN triode is connected with the negative power input end of the buzzer, and the emitters of the two NPN triodes are connected.

7. The screw detection device of claim 1, wherein the display circuit comprises a voltage display meter and an adjustable resistor, and one end of the adjustable resistor is connected with a positive power supply input end of the voltage display meter.