A thermal-sensitive gear electric control demonstrator

Abstract

The invention discloses a thermal-sensitive gear modeling electronic control demonstrator. The technical scheme thereof mainly includes a base plate, wherein the base plate is provided with a stepping motor, a cylindrical gear reduction mechanism and a gear base disc, wherein the gear base disc is connected to the stepping motor through the cylindrical gear reduction mechanism, and a thermal-sensitive paper is also arranged on the gear base disc; a linear slide rail and a linear slider are also arranged on the base plate, and a transverse support plate and a displacement plate are arranged on the linear slider; the gear base disc and the transverse support plate are connected by a steel wire; a plurality of electromagnets and armature columns are also arranged on both sides of the transverse support plate, wherein the armature columns are fixedly connected to a transparent plastic plate, a spring is abutted between the transparent plastic plate and the electromagnet, a rack profile sample groove is also arranged on the transparent plastic plate, and an electric heating wire is arranged in the groove. The invention uses the electric heating wire to simulate the rack profile, and utilizes the thermal-sensitive principle to realize the rapid and effective drawing of the gear tooth profile. Compared with the traditional gear modeling demonstrator, the invention has made great improvements in terms of function, efficiency and operability.

Description

Technical Field

[0001] The invention relates to a teaching experimental instrument, and more specifically to a thermal-sensitive gear forming electronically controlled demonstrator. Background Art

[0002] my country's steel, automobiles, ships, machine tools, building materials, coal, cement, etc. are among the best in the world, making it a world manufacturing power. Basic parts represented by gears are not only the basic industries of my country's equipment manufacturing industry, but also an important foundation for all areas of national economic construction. With high industrial relevance, strong employment absorption and intensive technical capital, it is an important guarantee for the industrial upgrading and technological progress of various host industries, and a landmark industry for my country's transformation from a manufacturing power to a manufacturing powerhouse.

[0003] There are many kinds of gear cutting processes, but according to their principles, they can be divided into two categories: profiling method and modeling method. Modeling method is currently the most commonly used gear cutting method. At present, colleges and universities generally have involute gear tooth profile drawing experiments. This experiment is very important for students majoring in machinery and other majors, and it can play an intuitive role in their understanding of gear processing methods. As far as the current general situation is concerned, the gear modeling instrument is a commonly used gear modeling principle experimental demonstration / verification device. However, this device has certain defects, resulting in unclear experimental results. At the same time, due to its cumbersome operation method, it will waste a lot of unnecessary demonstration time and make students feel bored with the course. This design is developed to improve these problems. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a thermal-sensitive gear electric-controlled demonstrator, which adopts a heating wire to simulate the rack profile, utilizes the thermal-sensitive principle, and combines electromechanical technology to achieve rapid and effective drawing of the gear tooth profile with full automation. Compared with the traditional gear electric-controlled demonstrator, the thermal-sensitive gear electric-controlled demonstrator has been greatly improved in terms of function, efficiency, operability, etc.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a thermal-sensitive gear fancheng electric control demonstrator, comprising a substrate, characterized in that: a stepping motor, a cylindrical gear reduction mechanism and a gear base disc are arranged on the substrate, the gear base disc is connected to the stepping motor through the cylindrical gear reduction mechanism, and a thermal paper is arranged on the gear base disc; a linear slide is also arranged on the substrate, a linear slider is slidably connected to the linear slide, a left travel switch and a right travel switch are arranged on both sides of the linear slide, the linear slider matches the left travel switch and the right travel switch, and a There are a transverse support plate and a displacement plate; a wire groove is provided on the side wall of the gear base disc in the circumferential direction, and a steel wire is provided in the wire groove to cross-connect the left and right sides of the gear base disc and the left and right sides of the transverse support plate; a plurality of electromagnets are symmetrically provided on both sides of the transverse support plate, and the end faces of the electromagnets on both sides are on the same horizontal plane, and an armature column is also provided on the electromagnet, one end of the armature column is fixedly connected to a transparent plastic plate, a spring is abutted between the transparent plastic plate and the electromagnet, and a rack profile sample groove is also provided on the transparent plastic plate, and a heating wire is provided in the rack profile sample groove.

[0006] The present invention is further configured as follows: the transparent plastic plate is made of high temperature resistant plastic.

[0007] The present invention is further configured as follows: a single-chip control module is also arranged on the substrate, and the single-chip control module is electrically connected to the stepping motor, the heating wire, the electromagnet, the left travel switch and the right travel switch.

[0008] The present invention is further configured as follows: a support foot is hingedly connected to the base plate, and a support pad is arranged on one end of the support foot away from the base plate.

[0009] The present invention is further configured as follows: the linear slide is fixedly connected to the base plate, the linear slide is slidably connected to the linear slider via a dovetail groove, the mid-perpendicular line of the linear slide passes through the center of the gear base disc; the vertical distance between the lower end surface of the horizontal support plate and the lower edge of the base plate is set to L h The vertical distance between the upper end surface of the gear base disc and the lower edge of the base plate is set to L c , then L h Greater than L c .

[0010] The present invention is further configured as follows: the cylindrical gear reduction mechanism is a primary cylindrical gear reduction mechanism, including gear A and gear B, wherein gear A is a nylon gear with 18 teeth and a module of 1, and its pitch circle diameter is D A =18×1mm=18mm, the gear B needs to be a nylon gear with 90 teeth and a module of 1, and its pitch circle diameter is D B=90×1mm=90mm, the transmission ratio between gear A and gear B is i=5, and the center distance between gear A and gear B is d=(D A +D B )÷2=54mm.

[0011] The present invention is further configured as follows: a displacement screw is provided between the transverse support plate and the displacement plate, a truncated table is provided inside the transverse support plate, and the displacement screw passes through the side wall of the displacement plate and is threadedly connected to the truncated table.

[0012] The present invention is further configured as follows: a groove is provided in the transverse support plate, the frustum is provided in the groove, and the frustum can rotate around the central axis in the groove and maintain a certain gap with the side wall of the groove.

[0013] The present invention is further configured as follows: the single-chip microcomputer control module includes a motor drive module, a temperature control module and a tooth profile drawing module, the temperature control module is used to control the temperature of the heating wire, the motor drive module is used to output a pulse signal to control the stepper motor, and the tooth profile drawing module is used to control the on and off of the electromagnet to drive the heating wire to move periodically, and at the same time cooperate with the drive of the stepper motor to draw the tooth profile.

[0014] The present invention is further configured as follows: a movement cycle of the tooth profile drawing module is set to 1 second, and in one movement cycle, the electric heating wire imprinting time T=0.6 seconds, the lifting time T0=0.3 seconds, and the lateral support plate travel time T1=0.1 seconds, wherein the output speed of the stepping motor 2 during the travel process is 1.57 rad / s, the primary cylindrical gear transmission ratio is 5, and the speed of the gear base disc 4 is α=0.314 rad / s; in each cycle, the travel distance of the lateral support plate 7 is:

[0015] s=R×α×T1=100×0.314×0.1mm=3.14mm, where R is the radius of the gear base disc (4).

[0016] In summary, the present invention has the following beneficial effects:

[0017] Compared with the traditional hand-drawn modeling instrument, the thermal gear modeling electronic controller of the present invention uses the principle of thermal stamping to reduce the error of hand-drawn gear drawing; after power is turned on, it can draw efficiently and accurately; the thermal gear modeling electronic controller combines the principle of thermal stamping with the principle of gear modeling, which is convenient, reliable, cost-saving, and fully automated to achieve gear drawing, and also has the following advantages:

[0018] 1. This design uses a heating wire with a rack tooth profile shape to draw the tooth profile on thermal paper. The heating wire is heated and pressed into contact with the thermal paper to draw the tooth profile. No pen or ink is required. The drawing method is simple and efficient, and the shape is clear and obvious.

[0019] 2. It can realize full-automatic operation. It is mechatronic. Through the transmission mechanism composed of stepper motor, primary cylindrical gear speed change, steel wire and linear guide, it can greatly improve the working efficiency. The steel wire is gapless transmission with higher precision.

[0020] 3. The instrument is equipped with a switch that can be started and stopped manually. It has strong controllability and can perform continuous drawing.

[0021] 4. The processing process is transparent and the principle is clearly demonstrated, which is convenient for teachers to teach and demonstrate.

[0022] 5. This design uses a single-chip microcomputer to control the movement of each mechanism, making the entire instrument easy to operate, and the entire journey fast, stable and accurate. With a cycle of 1 second, one cycle consists of 0.1 second of walking, 0.6 second of pressing, and 0.3 second of lifting. Each cycle walks 3 mm, and it only takes 68 seconds to complete the entire demonstration process, which is highly efficient.

[0023] 6. The teacher conducted a live demonstration of the gear principle in class, which changed the previous teaching method of first teaching the principle and then asking students to do experiments to verify the principle, greatly improving the teaching efficiency and effectiveness.

[0024] 7. Through the demonstration of this design, students can have a more realistic understanding of the tooth shape after gear root cutting, the reasons for gear root cutting, and the methods to avoid root cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the front structure of this embodiment;

[0026] Figure 2 It is a schematic diagram of the side structure of this embodiment;

[0027] Figure 3 2 is a schematic diagram of the top structure of this embodiment;

[0028] Figure 4 Schematic diagram of the internal structure of the displacement plate and the transverse support plate of this embodiment;

[0029] Figure 5 This is a schematic diagram of the transmission structure of the gear base disc and the displacement plate wire in this embodiment;

[0030] Figure 6 It is a structural block diagram of the control part of this embodiment.

[0031] Figure numerals: 1. substrate; 2. stepping motor; 3. cylindrical gear reduction mechanism; 301. gear A; 302. gear B; 4. gear base disc; 401. thermal paper; 402. wire groove; 5. linear slide rail; 501. left travel switch; 502. right travel switch; 6. linear slider; 7. horizontal support plate; 701. round table; 702. groove; 8. displacement plate; 801. displacement screw; 9. wire; 10. electromagnet; 11. armature column; 12. transparent plastic plate; 13. spring; 14. rack profile sample slot; 15. heating wire; 16. single-chip control module; 1601. start switch; 1602. stop switch; 17. support foot; 1701. support pad. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] First, according to the experimental requirements, the rack module of this device is 25.

[0034] This embodiment discloses a thermal-sensitive gear electric control demonstrator. Figure 1-6 As shown, it includes a substrate 1, on which a stepping motor 2, a cylindrical gear reduction mechanism 3 and a gear base disc 4 are arranged. The gear base disc 4 is connected to the stepping motor 2 through the cylindrical gear reduction mechanism 3. The input of the driving force is provided by the stepping motor 2. Generated, since the torque of the motor is small, in order to increase the torque, a cylindrical reduction gear mechanism 3 is designed between the shafts of the stepping motor 2 and the gear base disc 4 to increase the torque; the gear base disc 4 is provided with a thermal paper 401; the substrate 1 is also provided with a linear slide 5, and a linear slider 6 is slidably connected to the linear slide 5, and a left stroke switch 501 and a right stroke switch 502 are provided on both sides of the linear slide 5, and the linear slider 6 matches the left stroke switch 501 and the right stroke switch 502, and a transverse support plate 7 and a displacement plate 8 are provided on the linear slider 6; the gear base disc 4 is provided with a wire groove 402 on the side wall in the circumferential direction, and a steel wire 9 is provided in the steel wire groove 402 to cross-connect the left and right sides of the gear base disc 4 and the left and right sides of the displacement plate 8. In order to convert the fixed-axis rotation of the gear base disc 4 into the translational motion of the transverse support plate 7, the steel wire 9 is used for transmission, such as Figure 5As shown, the left and right sides of the gear base disc 4 and the left and right sides of the horizontal support plate 7 are cross-connected by steel wires 9, and at the same time, the linear slide rails 5 are fixedly connected to the base plate 1, the linear slider 6 is fixedly connected to the displacement plate 8, and the displacement plate 8 is connected to the horizontal support plate 7 through a dovetail groove, so as to increase the constraint of the horizontal support plate 7, and the horizontal movement of the horizontal support plate 7 is ensured by the transmission of the steel wires 9 and the sliding of the slide rails. Compared with the traditional horizontal support plate 7 driving the gear base disc 4 through gear transmission, this method has high displacement accuracy and gapless transmission, which ensures that the drawn rack has higher accuracy. A number of electromagnets 10 are also symmetrically arranged on both sides of the horizontal support plate 7, and the end faces of the electromagnets 10 on both sides are on the same horizontal plane. An armature column 11 is also provided on the magnet 10, one end of which is fixedly connected to a transparent plastic plate 12, a spring 13 is abutted between the transparent plastic plate 12 and the electromagnet 10, a rack profile sample slot 14 is also provided on the transparent plastic plate 12, a heating wire 15 is provided in the rack profile sample slot 14, and by controlling the electromagnet 10, the electromagnets 10 on both sides control the movement of the armature column 11, driving the transparent plastic plate 12 to move, so that the heating wire 15 in the rack profile sample slot 14 is uniformly stressed when being pressed with the thermal paper 401, and then the spring 13 between the electromagnet 10 and the transparent plastic plate 12 is used to ensure that when the electromagnet has no magnetic force, the rack profile sample slot 14 is separated from the horizontal support plate 7.

[0035] Furthermore, the transparent plastic plate 12 is made of high temperature resistant plastic, and the temperature peak of the heating wire 15 can reach a high temperature of about 150 degrees Celsius when it is working. High temperature resistant plastic materials such as PPA must be used to ensure the normal use of the instrument.

[0036] Furthermore, the substrate 1 is also provided with a single-chip control module 16, which is electrically connected to the stepper motor 2, the heating wire 15, the electromagnet 10, the left travel switch 501 and the right travel switch 502. The substrate 1 is also provided with a start switch 1601 and a stop switch 1602 electrically connected to the single-chip control module 16. The single-chip control module controls the operation of each electrical appliance, thereby realizing the operation of the stepper motor 2, the temperature control of the heating wire 15 and the motion control of the electromagnet 10. The left and right travel switches can provide a stop signal to the single-chip microcomputer when the linear slider 6 reaches the limit position.

[0037] Furthermore, a support leg 17 is hingedly connected to the base plate 1 , and a support pad 1701 is provided on one end of the support leg 17 away from the base plate.

[0038] Furthermore, the linear guide rail 5 is fixedly connected to the base plate 1, and the linear guide rail 5 is slidably connected to the linear slider 6 through a dovetail groove, and the axis of the linear guide rail 5 passes through the center of the gear base disc 4; the vertical distance between the lower end surface of the horizontal support plate 7 and the lower edge of the base plate 1 is set to L h ,, the vertical distance between the upper end surface of the gear base disc 4 and the lower edge of the base plate 1 is set to L c , then L h Greater than L c Since a dovetail groove is provided at the lower end of the transverse support plate 7 and electromagnets 10 are provided on the left and right sides, when the gear base disc 4 rotates along a fixed axis to drive the transverse support plate 7, especially when displacement occurs, the gear base disc 4 is likely to contact the transverse support plate 7, resulting in a reduction in the travel of the transverse support plate 7. Therefore, the relative position of the transverse support plate 7 and the gear base disc 4 must be ensured as set above.

[0039] Furthermore, the cylindrical gear reduction mechanism 3 is a primary cylindrical gear reduction mechanism, including gear A301 and gear B302. The gear A301 is a nylon gear with 18 teeth and a module of 1, and its pitch circle diameter is D A =18×1mm)=18mm, the gear B302 needs to be a nylon gear with 90 teeth and a module of 1, and its pitch circle diameter is D B =90×1mm=90mm, the transmission ratio between the gear A301 and the gear B302 is i=5, and the center distance between the gear A301 and the gear B302 is d=(D A +D B )÷2=54mm.

[0040] Furthermore, a displacement screw 801 is provided between the transverse support plate 7 and the displacement plate 8 , a truncated table 701 is provided inside the transverse support plate 7 , and the displacement screw 801 passes through the side wall of the displacement plate 8 and is threadedly connected to the truncated table 701 .

[0041] Furthermore, the transverse support plate 7 is provided with a groove 702, and the truncated table 701 is provided in the groove 702. The truncated table 701 can rotate around the central axis in the groove 702 and maintain a certain gap with the side wall of the groove 702. In order to complete the demonstration and verification of the displacement gear and the root cutting phenomenon, a screw drive is added between the displacement plate 8 and the transverse support plate 7. By rotating the displacement screw 801, the longitudinal movement of the transverse support plate 7 is realized. The screw drive has the advantages of being able to change the movement mode and direction of the mechanism, having a large speed ratio, saving effort, and being self-locking. Considering that the thread tapping directly on the transverse support plate 7 and the displacement screw 801 require extremely high coaxiality matching accuracy, a slight deviation will result in transmission failure. Therefore, a truncated table 701 with corresponding thread tapping is placed in the corresponding position of the transverse support plate 7. The truncated table 701 can rotate around the central axis in the transverse support plate 7 and maintain a certain gap with the transverse support plate 7. By rotating the displacement screw 801, the device can adjust the coaxiality by itself. In this way, the processing accuracy requirements can be greatly reduced.

[0042] Furthermore, the single-chip computer control module 16 includes a motor drive module, a temperature control module and a tooth profile drawing module. The temperature control module is used to control the temperature of the heating wire 15 to keep the temperature of the heating wire 15 at about 120°C. When the thermal paper 401 contacts an object above 90°C, the thermal layer begins to change color. Therefore, when the energized heating wire 401 is pressed on the thermal paper 401, a tooth profile shape will appear on the paper; the motor drive module is used to output a pulse signal to control the stepper motor 2, and the tooth profile drawing module is used to control the on and off of the electromagnet 10, drive the heating wire 15 to move periodically, and at the same time cooperate with the drive of the stepper motor 2 to draw the tooth profile. The single-chip computer controls the start and stop of the electromagnet 10. When the stepper motor 2 rotates, the electromagnet 10 is not energized. When the stepper motor 2 stops, the electromagnet 10 starts to work. When energized, due to the magnetism of the electromagnet 10, the armature column 11 installed on the transparent plastic plate 12 is attracted by the electromagnet 10. In this way, the heated heating wire 15 contacts the thermal paper 401, completing a tooth profile drawing.

[0043] Furthermore, a movement cycle of the tooth profile drawing module is set to 1 second, and in one movement cycle, the electric heating wire (10) has an imprinting time T=0.6 second, a lifting time T0=0.3 second, and a horizontal support plate 7 travel time T1=0.1 second, wherein the output speed of the stepping motor 2 during the travel process is 1.57 rad / s, the primary cylindrical gear transmission ratio is 5, and the speed of the gear base disc 4 is α=0.314 rad / s; in each cycle, the travel distance of the horizontal support plate 7 is s=R×α×T1=100×0.314×0.1mm=3.14mm, wherein R is the radius of the gear base disc 4, and the above data are obtained through experiments. After the heating wire 15 is powered on, it needs a preheating time of 6s. As time goes by, the temperature of the heating wire 15 gradually increases and is controlled at about 120°C by a temperature controller. If the contact time between the heating wire 15 and the thermal paper 401 is too short, the rack outline will be too light. If the contact time is too long, the rack outline will be too thick. In order to ensure that the drawn tooth profile basically falls in a uniform thin line state, the stamping time needs to be designed. At the same time, in order to ensure a smoother and more beautiful envelope shape, the walking time needs to be designed. Therefore, after repeated tests, 1 second is taken as a cycle. One cycle consists of thermal stamping and holding for 0.6 seconds, stamping lifting for 0.3 seconds, and walking for 0.1 seconds.

[0044] The working process of the thermal gear Fancheng electronic control demonstrator is as follows:

[0045] 1. Select the gear forming method (such as standard, root cutting, etc.).

[0046] 2. The stepper motor 2 transmits the driving force to the gear base disc 4 through the cylindrical gear reduction mechanism 3.

[0047] 3. The gear base disc 4 rotates and drives the steel wire 9 to pull the transverse support plate 7 to move horizontally.

[0048] Fourth, when the horizontal support plate 7 moves for the set travel time, the single chip control module 16 is used to control the stepping motor 2 to stop, thereby making the horizontal support plate 7 stop.

[0049] 5. At the same time, the control electromagnet 10 of the single-chip control module 16 is energized to attract the armature column 11, driving the transparent plastic plate 12 with the rack profile sample groove 14 to approach the thermal paper 401 and stay for the set imprinting and holding time, and then the electromagnet 10 is de-energized through the single-chip control module 16, so that the transparent plastic plate 12 is lifted to the initial height driven by the spring 13, thereby realizing the periodic reciprocating motion of the transparent plastic plate 12.

[0050] 6. Using the thermal embossing method, the material in the rack profile sample slot 14 is a heating wire 15. The temperature of the heating wire 15 is kept stable at about 120°C through the single-chip control module 16. When the heating wire 15 is close to the thermal paper 401, the gear profile will be embossed.

[0051] 7. After the stamping is completed and the transparent plastic plate is lifted, the stepper motor 2 resumes driving force and the above steps 2 to 6 are repeated.

[0052] Repeat the process in sequence until the limit switch is touched, the device demonstration stops, and the entire experiment is completed.

[0053] The specific experimental operations are as follows:

[0054] First, the single chip control module 16 is connected to an external power source.

[0055] When drawing the standard gear tooth profile, install the thermal paper 401 on the gear base disc 4 to form a thermal paper wheel blank of the same size as the gear base disc 4, then adjust the displacement screw 801 to the center zero so that the normal line of the rack profile is tangent to the pitch circle of the thermal paper wheel blank, then move the transverse support plate 7 to the starting position, press the start switch 1601, the demonstration begins, and when the tooth profile sample runs to the end position, the travel switch at the corresponding position is triggered and the demonstration ends.

[0056] When drawing the tooth profile of the displacement gear, adjust the position of the thermal paper wheel blank, align the positive displacement sector area with the tooth profile sample position, then adjust the displacement screw, adjust the normal line of the scale at both ends of the tooth profile sample to 13.3mm away from the pitch circle of the thermal paper wheel blank, and finally move the transverse support plate 7 to the starting position, press the start switch 1601, and the demonstration begins. When the tooth profile sample runs to the end position, the travel switch at the corresponding position is triggered, and the demonstration ends.

[0057] According to the formula for the minimum number of teeth for standard gears without root cutting, it can be found that since the designed number of teeth is less than 14, the standard gear will have root cutting. In order to observe the phenomenon of no root cutting, a displacement gear is used. When the normal line of the scale at both ends of the tooth profile sample is adjusted to 13.3mm away from the pitch circle of the gear blank, the gear does not have root cutting.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal-sensitive gear electric control demonstrator, comprising a substrate (1), characterized in that: The substrate (1) is provided with a stepping motor (2), a cylindrical gear reduction mechanism (3) and a gear base disc (4); the gear base disc (4) is connected to the stepping motor (2) via the cylindrical gear reduction mechanism (3); and the gear base disc (4) is provided with a thermal paper (401); the substrate (1) is also provided with a linear slide rail (5); a linear slider (6) is slidably connected to the linear slide rail (5); a left travel switch (501) and a right travel switch (502) are provided on both sides of the linear slide rail (5); the linear slider (6) matches the left travel switch (501) and the right travel switch (502); and a transverse support plate (7) and a displacement plate (8) are provided on the linear slider (6); the gear base disc (4) is circumferentially A steel wire groove (402) is provided on the side wall thereof, and a steel wire (9) is provided in the steel wire groove (402) for cross-connecting the left and right sides of the gear base disc (4) and the left and right sides of the transverse support plate (7); a plurality of electromagnets (10) are symmetrically provided on both sides of the transverse support plate (7), and the end faces of the electromagnets (10) on both sides are on the same horizontal plane; an armature column (11) is provided on the electromagnet (10), and one end of the armature column (11) is fixedly connected to a transparent plastic plate (12); a spring (13) is abutted between the transparent plastic plate (12) and the electromagnet (10); a rack profile sample groove (14) is provided on the transparent plastic plate (12), and a heating wire (15) is provided in the rack profile sample groove (14); The transparent plastic plate (12) is made of high temperature resistant plastic; The substrate (1) is also provided with a single-chip microcomputer control module (16), the single-chip microcomputer control module (16) being electrically connected to the stepping motor (2), the heating wire (15), the electromagnet (10), the left travel switch (501) and the right travel switch (502), and the substrate (1) is also provided with a start switch (1601) and a stop switch (1602) electrically connected to the single-chip microcomputer control module (16); The single-chip control module (16) comprises a motor drive module, a temperature control module and a tooth profile drawing module, wherein the temperature control module is used to control the temperature of the heating wire (15), the motor drive module is used to output a pulse signal to control the stepping motor (2), and the tooth profile drawing module is used to control the on and off of the electromagnet (10) to drive the heating wire (15) to move periodically and to draw the tooth profile in cooperation with the drive of the stepping motor (2); The tooth profile drawing module has a movement cycle of 1 second, and the heating wire (15) has a stamping time of 1 second. 0.6 seconds, lifting time 0.3 seconds, travel time of the horizontal pallet (7) 0.1 seconds, wherein the output speed of the stepper motor (2) during the travel process is 1.57 rad / s, the first-stage cylindrical gear transmission ratio is 5, and the speed of the gear base disc (4) is 0.314rad / s; in each cycle, the travel distance of the transverse support plate (7) is: , where R is the radius of the gear base disk (4).

2. A thermal-sensitive gear electric control demonstrator according to claim 1, characterized in that: A support foot (17) is also hingedly connected to the base plate (1), and a support pad (1701) is provided on one end of the support foot (17) away from the base plate.

3. A thermal-sensitive gear electric control demonstrator according to claim 1, characterized in that: The linear slide rail (5) is fixedly connected to the base plate (1), and the linear slide rail (5) is slidably connected to the linear slider (6) via a dovetail groove. The mid-perpendicular line of the linear slide rail (5) passes through the center of the gear base disc (4). The vertical distance between the lower end surface of the transverse support plate (7) and the lower edge of the base plate (1) is set to The vertical distance between the upper end surface of the gear base disc (4) and the lower edge of the base plate (1) is set to ,and To be greater than .

4. A thermal-sensitive gear electric control demonstrator according to claim 1, characterized in that: The cylindrical gear reduction mechanism (3) is a first-stage cylindrical gear reduction mechanism, comprising a gear A (301) and a gear B (302). The gear A (301) is a nylon gear with 18 teeth and a module of 1, and its pitch circle diameter is The gear B (302) is a nylon gear with 90 teeth and a module of 1, and its pitch circle diameter is , the transmission ratio between the gear A (301) and the gear B (302) , the center distance between gear A and gear B .

5. The thermal-sensitive gear electric control demonstrator according to claim 1, characterized in that: A displacement screw (801) is provided between the transverse support plate (7) and the displacement plate (8), a truncated table (701) is provided inside the transverse support plate (7), and the displacement screw (801) passes through the side wall of the displacement plate (8) and is threadedly connected to the truncated table (701).

6. A thermal-sensitive gear electric control demonstrator according to claim 5, characterized in that: A groove (702) is provided in the transverse support plate (7), and the round table (701) is arranged in the groove (702). The round table (701) can rotate around a central axis in the groove (702) and maintain a certain gap with the side wall of the groove (702).

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