CN213599984U

CN213599984U - Gear tooth thickness detector

Info

Publication number: CN213599984U
Application number: CN202022763958.XU
Authority: CN
Inventors: 王东飞; 吕泮功; 孔阳阳; 窦小鹏; 马骋天
Original assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd
Current assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-02
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a gear measurement technical field, especially a gear tooth thickness detector, including the disc base, its characterized in that, be equipped with centering mechanism on the disc base, a survey diameter mechanism for measuring reference circle diameter, a toggle mechanism for to the tooth location that awaits measuring, still include to carry out the thickness measurement mechanism that measures to the tooth thickness, in addition, this device volume is less, be convenient for remove, the measuring tool precision and the degree of automation of relative slide caliper rule class are higher relatively, the centering mechanism that is equipped with can be to the gear centering, convenient measurement, the survey diameter mechanism that is equipped with makes the measuring process simple and efficient with toggle mechanism cooperation thickness measurement mechanism, do not need too many manual operation.

Description

Gear tooth thickness detector

Technical Field

The utility model relates to a gear measurement technical field, especially a gear tooth thickness detector.

Background

In production and manufacturing, the machined gear is subjected to chordal thickness error detection and error analysis, and the analyzed data is utilized to correct and machine the gear so as to achieve reasonable chordal thickness parameters, thereby improving the machining precision of the gear.

A gear is a basic transmission element which is used for a rather wide range of applications for transmitting motion and power between two shafts. The gear is an important type in mechanical transmission and can be divided into straight teeth, helical teeth and herringbone teeth according to the direction of gear teeth. In the process of machining the gear, machining errors are easily generated due to factors such as installation of a machine tool, a cutter and a workpiece, and the machining precision of the gear cannot meet requirements. The error distribution condition of the gear in the current machining stage is obtained, and then the current error is corrected and machined, so that the gear machining precision is improved.

However, the existing measuring devices are generally large in size and inconvenient to move, and the measuring tools such as calipers are used, so that the positioning is not accurate enough.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a gear tooth thickness detector, which effectively solves the problems that the volume of the existing measuring device is generally large and inconvenient to move, and measuring tools such as calipers are used, and the positioning is not accurate enough, and the technical scheme of the solution is that the detector comprises a disc-shaped base and is characterized in that a centering mechanism is arranged on the disc-shaped base, a diameter measuring mechanism for measuring the diameter of a reference circle, a toggle mechanism for positioning the tooth to be measured and a thickness measuring mechanism for measuring the tooth thickness are also included;

the thickness measuring mechanism comprises a vertical guide rail fixedly connected to the left side of the upper end of a disc-shaped base, a first screw rod which is vertically arranged is rotatably connected in the vertical guide rail, a slide block which is in sliding fit with the vertical guide rail is connected to the first screw rod in a threaded manner, a first reversing motor which drives the first screw rod to rotate is fixedly connected to the upper end of the vertical guide rail, a transverse guide rail is fixedly connected to the right end of the slide block, a second screw rod which is transversely arranged is rotatably connected to the transverse guide rail, a fixed seat which is in sliding fit with the transverse guide rail is connected to the second screw rod in a threaded manner, a second reversing motor which drives the second screw rod to rotate is fixedly connected to the right end of the vertical guide rail, a first pressure induction switch is fixedly connected to the right side of the lower end of the transverse guide rail, two thickness measuring sheets which are vertically, the articulated department of two thickness gauges is equipped with a torsional spring, and two rocking arms of torsional spring contact with the upside of the articulated department of the looks remote site of two thickness gauges respectively, and the downside contact cooperation of the relative site of two thickness gauges just is located the lower extreme forward bend of the thickness gauge of front side, and the lower extreme backward bend of the thickness gauge that is located the rear side, and the downside of two thickness gauges is fixedly connected with detection piece respectively, and two thickness gauges are located detection piece top fixedly connected with detection switch respectively.

Preferably, the centering mechanism comprises a hollow sleeve fixedly connected to the center of the disc-shaped base, the outer edge surface of the hollow sleeve is hinged to one end of a plurality of first connecting rods uniformly arranged at intervals along the circumferential direction, the other end of each first connecting rod extends obliquely upwards and outwards from the disc-shaped base, a vertically-arranged lead screw is connected to the hollow sleeve in a rotating mode, a round nut is connected to the lead screw in a rotating mode, the outer edge surface of the round nut is hinged to one end of a plurality of second connecting rods uniformly arranged at intervals along the circumferential direction, the other end of each second connecting rod is connected to one end of each first connecting rod in an oblique mode and outwards extends out of the disc-shaped base in a protruding mode, the ends of each first connecting rod are in one-to-one correspondence and hinged connection with the hinged portion of each second connecting rod.

Preferably, the diameter measuring mechanism comprises a disc-shaped base, a cavity is formed in the center of the inner portion of the disc-shaped base, a driving motor is fixedly connected to the lower bottom surface of the cavity, a counting sensor rotatably connected to an output shaft of the driving motor is fixedly connected to the driving motor, the output shaft of the driving motor is vertically arranged, a driving bevel gear is fixedly connected to the upper end of the output shaft of the driving motor, a plurality of sliding grooves are uniformly arranged on the disc-shaped base at intervals, each sliding groove is respectively arranged along different radial axes of the disc-shaped base, a guide block is respectively and slidably fitted in each sliding groove, a third screw rod for driving the guide block to slide along the sliding grooves is respectively and rotatably connected in each sliding groove, each third screw rod extends inwards to the cavity towards one end of the center shaft of the disc-shaped base and is respectively and fixedly connected to a driven bevel gear matched with the driving, and the inner arc surfaces of the arc-shaped pieces are respectively and fixedly connected with second pressure induction switches, the second pressure induction switches are triggered to be connected with the controller to close the diameter measuring mechanism through the controller, and the shifting mechanism and the thickness measuring mechanism are started successively.

As preferred, toggle mechanism includes fixed connection and just is located the bracing piece in the vertical guide rail right side in disk base upper end, bracing piece right-hand member fixedly connected with a transverse arrangement and is located two electron telescopic links under surveying the thick piece, the fixed mounting that stretches out of electron telescopic link has an inductive probe, set up a constant head tank of arranging along the radial axis of disk base on the disk base, sliding fit has a motor cabinet in the constant head tank, motor cabinet upper end fixedly connected with rotates the motor, it is vertical arrangement and upper end fixedly connected with rubber friction gear to rotate the motor output shaft, the constant head tank internal rotation is connected with one and is used for the gliding drive screw of drive motor cabinet with motor cabinet threaded connection, drive screw is driven by the little motor of fixed connection on disk base outer fringe face.

The utility model has the advantages that:

1. the device has small volume, is convenient to move, and has relatively high precision and automation degree relative to measuring tools such as calipers and the like;

2. the centering mechanism can center the gear, so that the measurement is convenient;

3. the diameter measuring mechanism and the shifting mechanism are matched with the thickness measuring mechanism, so that the measuring process is simple, convenient and quick, and the manual operation is not needed.

Drawings

Fig. 1 is a perspective view of the first view angle of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic view of the utility model.

Fig. 4 is an enlarged schematic view of a in fig. 3 according to the present invention.

Fig. 5 is a schematic view of the centering mechanism of the present invention.

Fig. 6 is a schematic view of a local section of the thickness measuring mechanism of the present invention.

Fig. 7 is a schematic view of the electronic telescopic rod of the present invention.

Fig. 8 is a schematic view of a partial fitting of the present invention.

Fig. 9 is a schematic view of the thickness gauge sheet in a top view.

Reference numerals

1. The device comprises a disc-shaped base, 2. a vertical guide rail, 3. a first screw rod, 4. a sliding block, 5. a first reverse rotation motor, 6. a transverse guide rail, 7. a second screw rod, 8. a fixed seat, 9. a second reverse rotation motor, 10. a first pressure sensing switch, 11. a thickness measuring piece, 12. a hollow sleeve, 13. a first connecting rod, 14. a screw rod, 15. a round nut, 16. a second connecting rod, 17. a flexible disc, 18. a knob, 19. a driving motor, 20. a counting sensor, 21. a driving bevel gear, 22. a sliding groove, 23. a guiding block, 24. a third screw rod, 25. a driven bevel gear, 26. an arc piece, 27. a second pressure sensing switch, 28. a supporting rod, 29. an electronic telescopic rod, 30. a sensing probe, 31. a positioning groove, 32. a motor seat, 33. a rotation motor, 34. the device comprises a rubber friction gear, 35 parts of a driving screw rod, 36 parts of a small motor, 37 parts of a torsion spring, 38 parts of a detection sheet and 39 parts of a detection switch.

Detailed Description

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiment of the utility model provides an in the attached drawing: the different types of hatching in the figures are not given the national standards, do not require the material of the elements, and distinguish between cross-sectional views of the elements in the figures.

The following description of the present invention will be made in detail with reference to the accompanying drawings 1 to 9.

The first embodiment adopts the technical scheme that the device comprises a disc-shaped base 1 and is characterized in that a centering mechanism, a diameter measuring mechanism for measuring the diameter of a reference circle, a shifting mechanism for positioning teeth to be measured and a thickness measuring mechanism for measuring the tooth thickness are arranged on the disc-shaped base 1;

the thickness measuring mechanism comprises a vertical guide rail 2 fixedly connected to the left side of the upper end of a disc-shaped base 1, a vertically arranged first screw rod 3 is connected in the vertical guide rail 2 in a rotating manner, a slide block 4 in sliding fit with the vertical guide rail 2 is connected to the first screw rod 3 in a threaded manner, a first reverse motor 5 for driving the first screw rod 3 to rotate is fixedly connected to the upper end of the vertical guide rail 2, a transverse guide rail 6 is fixedly connected to the right end of the slide block 4, a transversely arranged second screw rod 7 is connected in the transverse guide rail 6 in a rotating manner, a fixed seat 8 in sliding fit with the transverse guide rail 6 is connected to the second screw rod 7 in a threaded manner, a second reverse motor 9 for driving the second screw rod 7 to rotate is fixedly connected to the right end of the vertical guide rail 2, a first pressure induction switch 10 is fixedly connected to the right side of the lower end of the transverse, two survey thick slice 11 looks remote site upside staggered arrangement and articulated jointly connect in same position, two survey thick slice 11 articulated departments are equipped with a torsional spring 37, two rocking arms of torsional spring 37 respectively with the articulated upside contact of department of looks remote site of two survey thick slices 11, the lower extreme contact cooperation of two survey thick slice 11 looks remote sites just is located the lower extreme forward bending of the thickness measuring slice 11 of front side, the lower extreme backward bending of the thickness measuring slice 11 that is located the rear side, the downside of two survey thick slices 11 is fixedly connected with detection piece 38 respectively, two survey thick slice 11 and are located detection piece 38 top fixedly connected with detection switch 39 respectively. When the thickness measuring device is used, a gear to be measured is centered through a centering mechanism, the diameter measuring mechanism measures the reference circle diameter of the gear, the controller is switched on under the action of the second inductive switch and triggers the toggle mechanism to enable one tooth of the gear to be toggled to be below the thickness measuring mechanism so as to measure the thickness of the tooth, then the controller controls the toggle mechanism to reset and simultaneously starts the thickness measuring mechanism, the thickness measuring mechanism starts the second reverse motor 9 to rotate forwards through the controller, the second reverse motor 9 drives the second screw 7 to rotate forwards, so that the fixed seat 8 moves rightwards along the transverse guide rail 6 to the position of the reference circle diameter measured by the diameter measuring mechanism, the controller controls the second reverse motor 9 to stop rotating and starts the first reverse motor 5 to rotate forwards, the first screw 3 is driven to rotate forwards and the slide block 4 moves downwards along the vertical guide rail 2, and the transverse guide rail 6 moves downwards along with the slide block 4 integrally, until the first pressure induction switch 10 contacts with the upper end face of the gear and generates corresponding pressure to stop the first reversing motor 5 for a set time, the thickness measuring mechanism resets under the action of the controller, wherein in the process of moving the transverse guide rail 6 downwards, the fixed seat 8 is positioned right above the gear reference circle of the tooth thickness to be measured, the thickness measuring sheet 11 is hinged and connected at the central position of the lower end of the fixed seat 8, the tooth to be measured is positioned below the two thickness measuring sheets 11 under the action of the toggle mechanism, the lower end of the thickness measuring sheet 11 starts to contact with the reference circle position of the tooth along with the downward movement of the transverse guide rail 6, because the lower sides of the opposite ends of the two thickness measuring sheets 11 are in contact fit, the lower end of the thickness measuring sheet 11 positioned on the front side is bent forwards, and the lower end of the thickness measuring sheet 11 positioned on the rear side is bent backwards, the two thickness measuring sheets 11 can be smoothly separated and clamped on two sides of the same tooth in the process of moving, under the action of the torsion spring 37, the two thickness measuring sheets 11 synchronously act at the same time, but only one thickness measuring sheet 11 does not act, when the two thickness measuring sheets 11 are clamped on two sides of one tooth and move downwards to the detecting sheet 38 to be contacted with the tooth side face, and the detecting switch 39 is a contact switch which is contacted and matched with the tooth and is triggered, the two detecting sheets 38 transmit the distance between the two detecting sheets to the controller and display the distance in a digital mode to obtain the tooth thickness, the controller is the prior art, and the specific structure of the controller is not described in detail.

The second embodiment, on the basis of the first embodiment, the centering mechanism includes a hollow sleeve 12 fixedly connected to the center of the disc-shaped base 1, an outer edge surface of the hollow sleeve 12 is hinged to one end of a plurality of first connecting rods 13 evenly spaced apart from each other in the circumferential direction, the other end of each first connecting rod 13 extends out of the disc-shaped base 1 in an inclined direction and in a direction, a vertically-arranged lead screw 14 is connected to the hollow sleeve 12 in a rotating manner, a round nut 15 is connected to the lead screw 14 in a rotating manner, an outer edge surface of the round nut 15 is hinged to one end of a plurality of second connecting rods 16 evenly spaced apart from each other in the circumferential direction, the other end of each second connecting rod 16 is connected to each first connecting rod 13 in an inclined direction and in a direction, the extending end of the disc-shaped base 1 in a one-to-one and hinged manner, each first connecting rod 13 is connected to a flexible disc 17 in a coaxial rotating. When the gear centering device is used, because the sizes of inner holes of different gears are different, when the gears are centered through the inner holes, the inner holes of the gears to be measured firstly penetrate through the knobs 18 and the screw rods to be placed on the disc-shaped base 1, then the knobs 18 are rotated clockwise, the screw rods 14 rotate clockwise and drive the round nuts 15 to move downwards to be close to the hollow sleeves 12 under the limiting effect of the hollow sleeves 12, so that the included angles between the first connecting rods 13 and the second connecting rods 16 are reduced, meanwhile, the hinged parts of the first connecting rods 13 and the second connecting rods 16 are relatively far away from the screw rods 14 to be increased, the flexible discs 17 stop rotating when jacking the hole walls of the inner holes of the gears, and the.

In the third embodiment, on the basis of the first embodiment, the diameter measuring mechanism includes a cavity formed in the center of the inner portion of the disc-shaped base 1, a driving motor 19 is fixedly connected to the lower bottom surface of the cavity, a counting sensor 20 rotatably connected to an output shaft of the driving motor 19 is fixedly connected to the driving motor 19, a driving bevel gear 21 is vertically arranged on the output shaft of the driving motor 19, a plurality of sliding grooves 22 are uniformly arranged on the disc-shaped base 1 at intervals, each sliding groove 22 is respectively arranged along different radial axes of the disc-shaped base 1, a guide block 23 is respectively slidably fitted in each sliding groove 22, a third screw 24 for driving the guide block 23 to slide along the sliding groove 22 is respectively rotatably connected in each sliding groove 22, one end of each third screw 24, which points to the center axis of the disc-shaped base, extends inwards into the cavity and is respectively and fixedly connected with a driven bevel gear 25 matched with the driving bevel gear, the upper end of each guide block 23 is fixedly connected with an arc piece 26 with an opening facing to the central axis of the disc-shaped base 1, the inner arc surface of each arc piece 26 is fixedly connected with a second pressure induction switch 27, the second pressure induction switch 27 is triggered to be connected with the controller to close the diameter measuring mechanism through the controller, and meanwhile, the toggle mechanism and the thickness measuring mechanism are started successively. When the centering mechanism is used, the diameter measuring mechanism cannot be used for centering the gear, centering cannot be achieved due to the fact that the edges of the two arc-shaped pieces 26 are clamped into a tooth gap, when centering of the gear is achieved through the centering mechanism, the driving motor 19 is started to rotate clockwise, the driving motor 19 drives the driving bevel gear 21 to rotate clockwise through the output shaft and further drives the driven bevel gear 25 to rotate anticlockwise, the driven bevel gear 25 drives the third screw 24 to rotate anticlockwise, the guide block 23 is close to the gear to move along the sliding groove 22, along with movement of the guide block 23, the second pressure sensing switch 27 on the inner arc surface of the arc-shaped pieces 26 is in contact with the outer edge surface of the gear and is triggered to start the controller, the controller controls the driving motor 19 to stop rotating, meanwhile, the counting sensor 20 counts the number of rotations of the output shaft of the driving motor 19, converts the number of rotations into the diameter of the addendum circle, and transmits the diameter to the controller, and the controller calculates the converted diameter of the addendum circle The reference circle diameter to the fixing base 8 that the controller controlled thickness measuring mechanism can be accurate removes to the reference circle position, then the controller control diameter measuring mechanism resets and starts toggle mechanism simultaneously.

Fourth embodiment, on the basis of first embodiment, toggle mechanism includes fixed connection and just is located the bracing piece 28 in the 2 right sides of vertical guide rail in the 1 upper end of disc base, bracing piece 28 right-hand member fixedly connected with a transverse arrangement just is located two and surveys electronic telescopic link 29 under thick piece 11, stretching out fixed mounting of electronic telescopic link 29 has an inductive probe 30, set up a constant head tank 31 of arranging along disc base 1 radial axis on the disc base 1, sliding fit has a motor cabinet 32 in constant head tank 31, motor cabinet 32 upper end fixedly connected with rotates motor 33, it is vertical arrangement and upper end fixedly connected with rubber friction gear 34 to rotate motor 33 output shaft, constant head tank 31 internal rotation is connected with one and is used for the gliding drive screw 35 of drive motor cabinet 32 with motor cabinet 32 threaded connection, drive screw 35 is driven by small motor 36 of fixed connection on disc base 1 outer fringe face. In the embodiment, when the electronic telescopic rod 29 is in a contracted state initially, after the toggle mechanism is triggered, the controller firstly controls the electronic telescopic rod 29 to extend until the induction probe 30 reaches the diameter of the addendum circle, the diameter of the addendum circle is measured by the diameter measuring mechanism and is transmitted to the controller, because of the uncertainty of the placement of the gear, the induction probe 30 may not contact with the addendum circle, in order to enable the two thickness measuring sheets 11 of the thickness measuring mechanism to be normally clamped to two sides of one tooth for tooth thickness measurement, the controller controls the small motor 36 and the rotating motor 33 to be started simultaneously, the small motor 36 drives the motor 19 to move along the positioning groove 31 by driving the driving screw 35 to rotate under the action of the controller, so that the motor base 32 moves to a position which is away from the gear and is the gear reference circle radius plus the rubber friction gear 34 reference circle radius, the rotating motor 33 continues to rotate, the rubber friction gear 34 continues to rotate and is in friction fit with the gear to rotate the gear, in the gear rotation process, the inductive probe 30 contacts with the gear tooth crest and calculates the time from the first contact with the gear tooth crest to the second contact with the gear tooth crest, and transmits the time to the controller, the controller controls the rotating motor 33 to rotate again for the time and then stop rotating, at this time, the gear tooth crest of the third tooth just contacts with the inductive probe 30, and the third tooth is positioned under the two thickness measuring sheets 11 or slightly deviated, when the thickness measuring mechanism is started, the two thickness measuring sheets 11 just can contact with the two sides of the third tooth to finish measuring the tooth thickness, even if the third tooth is slightly deviated and is not positioned under the thickness measuring sheets 11, however, the lower ends of the two thickness measuring pieces 11 are of a bent open structure, and the upper sides of the two thickness measuring pieces 11 can be opened simultaneously under the action of the torsion spring 37, so that the teeth to be measured can be automatically corrected even if a slight deviation exists, the teeth to be measured are positioned in the middle of the two thickness measuring pieces 11 to complete measurement, and then the electronic telescopic rod 29 and the thickness measuring mechanism are reset under the action of the controller.

Claims

1. A gear tooth thickness detector comprises a disc-shaped base (1) and is characterized in that a centering mechanism, a diameter measuring mechanism for measuring the diameter of a reference circle, a shifting mechanism for positioning teeth to be measured and a thickness measuring mechanism for measuring the tooth thickness are arranged on the disc-shaped base (1);

the thickness measuring mechanism comprises a vertical guide rail (2) fixedly connected to the left side of the upper end of a disc-shaped base (1), a vertically arranged first screw rod (3) is connected in the vertical guide rail (2) in a rotating mode, a sliding block (4) in sliding fit with the vertical guide rail (2) is connected to the first screw rod (3) in a threaded mode, a first reverse motor (5) for driving the first screw rod (3) to rotate is fixedly connected to the upper end of the vertical guide rail (2), a transverse guide rail (6) is fixedly connected to the right end of the sliding block (4), a transversely arranged second screw rod (7) is connected in the transverse guide rail (6) in a rotating mode, a fixing seat (8) in sliding fit with the transverse guide rail (6) is connected to the second screw rod (7) in a threaded mode, a second reverse motor (9) for driving the second screw rod (7) to rotate is fixedly connected to the right end of the vertical guide rail (2), fixing base (8) lower extreme is articulated to be connected with two vertical arrangements and can fore-and-aft rotation thickness gauge piece (11), two thickness gauge piece (11) looks remote site upside staggered arrangement and articulated connection in same position jointly, two thickness gauge piece (11) articulated department is equipped with a torsional spring (37), two rocking arms of torsional spring (37) contact with the upside of the articulated department of looks remote site of two thickness gauge pieces (11) respectively, the downside contact cooperation of two thickness gauge piece (11) looks remote site just is located the lower extreme forward bend of the thickness gauge piece (11) of front side, the lower extreme backward bend of the thickness gauge piece (11) that is located the rear side, the downside of two thickness gauge pieces (11) is fixedly connected with detection piece (38) respectively, two thickness gauge piece (11) are located detection piece (38) top and are fixedly connected with one respectively and detect switch (39).

2. The gear tooth thickness detector according to claim 1, wherein the centering mechanism comprises a hollow sleeve (12) fixedly connected to the center of the disc-shaped base (1), the outer edge surface of the hollow sleeve (12) is hinged to one end of a plurality of first connecting rods (13) uniformly spaced from each other along the circumferential direction, the other end of each first connecting rod (13) extends obliquely upward and points to the outer side of the disc-shaped base (1), a vertically-arranged screw rod (14) is rotatably connected to the hollow sleeve (12), a round nut (15) is rotatably connected to the screw rod (14), the outer edge surface of the round nut (15) is hinged to one end of a plurality of second connecting rods (16) uniformly spaced from each other along the circumferential direction, the other end of each second connecting rod (16) is in one-to-one correspondence and hinged connection with the extending ends of the first connecting rods (13) obliquely upward and points to the outer side of the disc-shaped base (1), the hinged parts of the first connecting rods (13) and the second connecting rods (16) are coaxially and rotatably connected with a flexible disc (17), and the upper end of the screw rod (14) is fixedly connected with a knob (18).

3. The gear tooth thickness detector according to claim 1, wherein the diameter measuring mechanism comprises a disc-shaped base (1) having a cavity at the center, a driving motor (19) fixedly connected to the lower bottom surface of the cavity, a counting sensor (20) rotatably connected to the output shaft of the driving motor (19) and fixedly connected to the upper end of the output shaft of the driving motor (19), a driving bevel gear (21) vertically arranged on the output shaft of the driving motor (19), a plurality of sliding grooves (22) uniformly arranged on the disc-shaped base (1) at intervals, each sliding groove (22) respectively arranged along different radial axes of the disc-shaped base (1), a guide block (23) respectively slidably fitted in each sliding groove (22), a third screw (24) rotatably connected to each sliding groove (22) for driving the guide block (23) to slide along the sliding groove (22), the directional disc chassis axis one end of each third screw rod (24) inwards extends to the cavity and respectively fixedly connected with one driven bevel gear (25) with drive bevel gear (21) complex, each guide block (23) upper end respectively fixedly connected with one opening towards centraxonial arc piece (26) of disc base (1), respectively fixedly connected with second pressure-sensitive switch (27) on the intrados of each arc piece (26), second pressure-sensitive switch (27) trigger can switch on the controller and close through the controller and survey diameter mechanism, successively start toggle mechanism and thickness measuring mechanism simultaneously.

4. The gear tooth thickness detector according to claim 1, wherein the toggle mechanism comprises a support rod (28) fixedly connected to the upper end of the disc-shaped base (1) and located at the right side of the vertical guide rail (2), the right end of the support rod (28) is fixedly connected with an electronic telescopic rod (29) which is transversely arranged and located right below the two thickness measuring sheets (11), an induction probe (30) is fixedly installed on the extension of the electronic telescopic rod (29), a positioning groove (31) arranged along the radial axis of the disc-shaped base (1) is formed in the disc-shaped base (1), a motor base (32) is in sliding fit in the positioning groove (31), a rotating motor (33) is fixedly connected to the upper end of the motor base (32), an output shaft of the rotating motor (33) is vertically arranged, a rubber friction gear (34) is fixedly connected to the upper end of the output shaft, a driving screw (35) which is in threaded connection with the motor base (32) and is used for driving the, the driving screw rod (35) is driven by a small motor (36) fixedly connected to the outer edge surface of the disc-shaped base (1).