CN210836792U

CN210836792U - A teaching aid for showing engine sensor

Info

Publication number: CN210836792U
Application number: CN201920898471.7U
Authority: CN
Inventors: 吴淑杰
Original assignee: Beijing Zhiyang Northern International Education Technology Co Ltd
Current assignee: Beijing Zhiyang Northern International Education Technology Co Ltd
Priority date: 2019-06-15
Filing date: 2019-06-15
Publication date: 2020-06-23
Anticipated expiration: 2029-06-15

Abstract

The utility model provides a teaching aid for showing engine sensor, including base, panel, terminal subassembly, transformer, sensor unit spare, the base is thin wall uncovered box structure and includes bottom plate, front bezel, back plate, curb plate, the panel is located the base upside, the upper surface of panel divides into title district, components and parts place the district from top to bottom in proper order, the circuit principle district, the first schematic diagram, the second schematic diagram, the power input picture are printed on the circuit principle district, the terminal subassembly includes positive terminal, negative terminal and detection terminal, the transformer passes through the connecting wire respectively with positive terminal and negative terminal looks electric connection; the sensor assembly comprises a first sensor, a second sensor and a connecting piece, wherein the connecting piece is fixed on the component placing area, the first sensor is fixed on the left side of the connecting piece, and the second sensor is fixed on the right side of the connecting piece. The teaching aid has the advantages of simple structure, high production efficiency, attractive appearance, good demonstration effect and convenient carrying, and can be carried by only one person without being carried by two persons.

Description

A teaching aid for showing engine sensor

Technical Field

The utility model relates to a teaching field, in particular to a teaching aid for showing engine sensor are repaiied to vapour.

Background

The engine is an important part on the automobile, and a plurality of sensors are arranged on the engine, so that the normal work of the engine is realized. Because some sensors are installed in the hidden positions in the automobile and are not easy to observe, teachers explain and students learn conveniently, and therefore teaching aids assisting teaching are developed. For example, chinese utility model patent publication No. CN 205140278U discloses a teaching device with sensor and executor system, including whole frame, be equipped with the demonstration panel on the whole frame, be equipped with circuit detection area and auto electric appliances integrated area on the demonstration panel, the circuit detection area is established in the upper right corner of demonstration panel, is equipped with the circuit theory of operation diagram of sensor and executor in the circuit detection area, be equipped with the detection terminal that detects the circuit on the circuit theory of operation diagram, auto electric appliances integrated area internal fixation has sensor, the control unit and executor, the sensor is connected with the input of the control unit, and the output and the executor of the control unit are connected.

However, in practice it has been found that the above patents suffer from the following drawbacks:

(1) in the teaching practice, if want to take this teaching device to the classroom, the cooperation classroom teaching is used, needs two people to walk the corridor and carries this teaching aid device to the classroom from the teaching aid room with it, and it carries back the teaching aid room to equally need two people to walk the corridor after the lecture ends and carry it back to because of being difficult to carry to lead to this teaching device rate of utilization low.

(2) The layout of the circuit detection area and the comprehensive area of the automobile electric devices on the demonstration panel is unreasonable, so that the appearance effect of the demonstration panel is poor, and the utilization rate of the demonstration panel is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a teaching aid for showing engine sensor to solve the defect that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a teaching aid for displaying an engine sensor, comprising:

the base is of a thin-wall uncovered box structure and comprises a bottom plate, a front plate, a rear plate and side plates, wherein the bottom plate is rectangular, the front plate is positioned in front of the bottom plate, the height of the front plate is h1, the rear plate is positioned behind the bottom plate, the rear plate is parallel to the front plate, the height of the rear plate is h2, h2 is greater than h1, the number of the side plates is two, the side plates are symmetrically positioned on the left side and the right side of the bottom plate, the side plates are in a right trapezoid shape, the front end and the rear end of each side plate are fixedly connected with the front plate and the rear plate respectively, and an included angle between the upper end surface of each side plate and the horizontal plane is 8-35 degrees;

the panel is positioned on the upper side of the base, the upper surface of the panel is sequentially divided into a title area, a component placing area and a circuit principle area from top to bottom, and Chinese characters are printed on the title area;

the component placing area is provided with a fixing hole, a first threading hole and a second threading hole;

a first schematic diagram, a second schematic diagram and a power input diagram are printed on the circuit principle area, the first schematic diagram is positioned on the left side of the second schematic diagram, detection holes are formed in the first schematic diagram and the second schematic diagram, the power input diagram is positioned between the first schematic diagram and the second schematic diagram, and a positive hole and a negative hole are formed in the power input diagram;

the terminal assembly comprises a positive terminal, a negative terminal and a plurality of detection terminals, wherein the positive terminal is inserted into the positive hole, the negative terminal is inserted into the negative hole, and the detection terminals are inserted into the detection holes;

the transformer is fixed on the upper end face of the bottom plate and is electrically connected with the positive terminal and the negative terminal through connecting wires respectively;

the sensor assembly comprises a first sensor, a second sensor and a connecting piece, wherein the connecting piece is fixed on the component placing area, the first sensor is fixed on the left side of the connecting piece, and a connecting wire of the first sensor penetrates through the first threading hole to be electrically connected with the detection terminal on the first schematic diagram and the transformer respectively;

the second sensor is fixed on the right side of the connecting piece, and a connecting wire of the second sensor penetrates through the second threading hole to be respectively electrically connected with the detection terminal and the transformer on the second schematic diagram.

Further, when the first sensor is a temperature control switch, the second sensor is a coolant temperature sensor.

Further, the title area is printed with Chinese characters, namely a temperature control switch and the temperature of cooling liquid.

Further, when the first sensor is a knock sensor, the second sensor is an intake pressure sensor.

Further, the header area is printed with Chinese characters, namely a knock sensor and an intake pressure sensor.

Furthermore, the base is made of metal, plastic or wood;

if the base is made of metal, the bottom plate, the front plate, the rear plate and the side plates are formed by stamping, bending and welding sheet metal materials with the thickness of 0.8-1.5 mm;

if the base is made of plastic, the bottom plate, the front plate, the rear plate and the side plates are integrally formed by injection molding through an injection molding machine;

if the bottom plate is made of wood, the bottom plate, the front plate, the rear plate and the side plates are assembled and connected through screws.

Further, when the base is made of metal, a protective layer is sprayed on the surface of the base.

Furthermore, the material of the panel is not limited to acrylic, toughened glass, PET, PC, PVC, ABS.

Furthermore, the cross section of the connecting piece is of an L-shaped structure, one end of the connecting piece is fixedly connected with the first sensor or the second sensor through a bolt and a nut, and the other end of the connecting piece is fixedly connected with the panel through the fixing hole through a bolt and a nut.

The teaching aid further comprises four foot pads and handles, the four foot pads are symmetrically fixed on the lower end face of the bottom plate, the foot pads are of an inverted frustum-shaped structure, and the height of each foot pad is not less than 10 mm;

the number of the handles is two, and the handles are symmetrically fixed on the outer side surface of the side plate.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a teaching aid for showing engine sensor, including base, panel, terminal subassembly, transformer, sensor subassembly, wherein, the base is thin wall uncovered box structure, and includes bottom plate, front bezel, back plate, curb plate, the bottom plate is the rectangle, the front bezel is located the front edge of bottom plate, the height of front bezel is h1, the back plate is located the back of bottom plate, the back plate is parallel with the front bezel, the height of back plate is h2, wherein h2 > h1, the quantity of curb plate is two, the symmetry is located the left and right sides of bottom plate, the curb plate is right trapezoid, and the front and back both ends of curb plate respectively with the front bezel with back plate fixed connection, the up end of curb plate is 8 ~ 35 with the contained angle of horizontal plane; the panel is positioned on the upper side of the base, the upper surface of the panel is sequentially divided into a title area, a component placing area and a circuit principle area from top to bottom, and Chinese characters are printed on the title area; the component placing area is provided with a fixing hole, a first threading hole and a second threading hole; a first schematic diagram, a second schematic diagram and a power input diagram are printed on the circuit principle area, the first schematic diagram is positioned on the left side of the second schematic diagram, detection holes are formed in the first schematic diagram and the second schematic diagram, the power input diagram is positioned between the first schematic diagram and the second schematic diagram, and a positive hole and a negative hole are formed in the power input diagram; the terminal assembly comprises a positive terminal, a negative terminal and a plurality of detection terminals, wherein the positive terminal is inserted into the positive hole, the negative terminal is inserted into the negative hole, and the detection terminals are inserted into the detection holes; the transformer is fixed on the upper end face of the bottom plate and is respectively and electrically connected with the positive terminal and the negative terminal through connecting wires; the sensor assembly comprises a first sensor, a second sensor and a connecting piece, the connecting piece is fixed on the component placing area, the first sensor is fixed on the left side of the connecting piece, and a connecting wire of the first sensor penetrates through the first threading hole to be electrically connected with the detection terminal on the first schematic diagram and the transformer respectively; the second sensor is fixed on the right side of the connecting piece, and a connecting wire of the second sensor penetrates through the second threading hole to be respectively electrically connected with the detection terminal and the transformer on the second schematic diagram. Above structure, this teaching aid simple structure, production efficiency are high, the appearance is pleasing to the eye, demonstration is effectual on the one hand, this teaching aid convenient to carry of on the other hand, only need alone alright, need not two people move and lift to improved the utilization ratio of this teaching aid, the rationally distributed of panel upper surface, compactness simultaneously, look and feel effectual, space utilization is high. In addition, the original vehicle circuit diagram of the first sensor and the original vehicle circuit diagram of the second sensor are drawn on the panel, the first sensor and the second sensor which are hidden in the inner position of the vehicle are fixed on the panel through the connecting pieces, and modular teaching of a teacher enables students to observe the shapes and the structures of the first sensor and the second sensor, so that not only can the circuit principles of the first sensor and the second sensor be observed, but also the numerical values of the first sensor and the second sensor can be measured through a testing instrument, the learning interest of the students is enhanced, and meanwhile, training preparation is made for subsequent teaching.

Drawings

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

FIG. 1 is a schematic view of a teaching aid without an imprinted pattern according to an embodiment;

FIG. 2 is a front view of a panel with an imprinted pattern according to one embodiment;

FIG. 3 is a schematic view of a base structure in one or more embodiments;

FIG. 4 is a schematic view of a teaching aid without an imprinted pattern according to a second embodiment;

FIG. 5 is a front view of a panel with an imprinted pattern according to the second embodiment;

illustration of the drawings: 1-a base; 11-a base plate; 12-a front plate; 13-a back plate; 14-side plates; 15-sheet metal material; 16-a protective layer;

2-a panel; 21-title area; 22-a component placement area; 221-fixing hole; 222-a first threading aperture; 223-a second threading hole;

23-circuit principle area; 231-first schematic diagram; 232-second schematic; 233-power input diagram; 234-detection wells; 235-positive electrode hole; 236-negative pole hole;

a 3-terminal assembly; 31-positive terminal; 32-negative terminal; 33-a detection terminal;

4-a sensor assembly; 41-a first sensor; 42-a second sensor; 43-a connector;

5-foot pad.

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 efforts belong to the protection scope of the present invention. In addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction as the upper, lower, left, right, etc. of the drawings, and the terms "first", "second", etc. are used for descriptive distinction and have no special meaning.

To the problem that exists among the prior art, the utility model provides a teaching aid for showing engine sensor, this teaching aid includes base, panel, terminal subassembly, transformer, sensor subassembly, and the concrete description is as follows:

1-base

The base is thin-walled uncovered box structure, and includes bottom plate, front bezel, back plate, curb plate, the bottom plate is the rectangle, the front bezel is located the front edge of bottom plate, the height of front bezel is h1, the back plate is located the back of bottom plate, the back plate with the front bezel is parallel mutually, the height of back plate is h2, wherein h2 > h1, the quantity of curb plate is two, and the symmetry is located the left and right sides of bottom plate, the curb plate is right trapezoid, and both ends around the curb plate respectively with the front bezel with back plate fixed connection mutually, the up end of curb plate is 8 ~ 35 with the contained angle of horizontal plane.

In a specific application scene, the included angle between the upper end face of the side plate and the horizontal plane is 8-35 degrees, so that the panel is inclined, and a student can observe and learn the sensor assembly and a circuit schematic diagram conveniently, therefore, the included angle α can be a value range value of α not more than 8 degrees and not more than 35 degrees, and can also be a value range value of α not more than 8 degrees and not more than 35 degrees, as long as the student can be ensured to observe and learn conveniently, which value can be set according to actual needs for concrete α, and the change of the angle does not influence the protection range of the application.

Furthermore, the base is made of metal, plastic or wood;

In a specific application scenario, when the base is made of metal, the cross section of the side plate is in an inverted L shape, more than two base holes are formed in the upper end face of the side plate, and riveting nuts are riveted on the base holes.

When the base is made of plastic, more than two base holes are formed in the inner side face of each side plate, and nuts are embedded in the base holes.

In a specific application scene, the protective layer protects the surface of the base from atmospheric corrosion, and the color of the protective layer is not limited to gray, black and orange.

In a specific application scene, the foot pad has the functions of height increasing, wear resistance, skid resistance, shock absorption and pressure resistance. The foot pad is made of synthetic rubber, and has the characteristics of no toxicity, no smell, no fading, comfortable hand feeling, exquisite appearance and the like, and also has the characteristics of high elasticity, aging resistance, corrosion resistance, high temperature resistance, oil resistance and shock absorption. Be equipped with the stainless steel gasket in the callus on the sole to the structural strength of callus on the sole has been increased.

Wherein, made things convenient for the mr to carry through addding the handle, avoid many people to move and lift, effectively solve the inconvenient problem of teaching aid transport among the background art to the utilization ratio of teaching aid has been improved.

2-panel

in a specific application scene, the title area, the component placement area and the circuit principle area are used for printing patterns or characters on the upper surface of the panel through printing processes such as carving or silk-screen printing, and the patterns and the Chinese characters are subjected to color setting according to actual needs, so that the color change does not affect the protection range of the application.

The panel is provided with panel holes, the number and the positions of the panel holes are consistent with those of the base holes, and the bolts are in threaded connection with the rivet nuts or the nuts through the panel holes, so that the panel is fixed on the base.

3-terminal assembly

The terminal assembly comprises a positive terminal, a negative terminal and a plurality of detection terminals, wherein the positive terminal is inserted into the positive hole, the negative terminal is inserted into the negative hole, and the detection terminals are inserted into the detection holes.

In a specific application scenario, the detection terminal is selected according to specific models of the first sensor and the second sensor, and the selected model of the terminal is adapted to the corresponding sensor, so that the specific model of the detection terminal is not limited in the application.

4-transformer

And the transformer is fixed on the upper end surface of the bottom plate and is respectively and electrically connected with the positive terminal and the negative terminal through connecting wires.

In a specific application scenario, the transformer converts a 12V voltage to a 5V voltage, thereby adapting to the voltage of the first sensor or the second sensor.

5-sensor assembly

In the concrete application scene, when first sensor is temperature detect switch, the second sensor is coolant temperature sensor, first sensor and second sensor all are fixed in on the connecting piece through supplementary sheet metal component.

In a specific application scenario, the first sensor and the second sensor may be not only a temperature control switch, a coolant temperature sensor, a knock sensor, an intake pressure sensor, but also other sensors on the engine. Because the sensor type on the engine is more, for the convenience of student's observation and study, specific sensor selects which type and model, can select according to actual need, consequently, the change of sensor kind and model can not influence the scope of protection of this application.

In a specific application scenario, the connecting piece is made of a 304 stainless steel plate with the thickness of 2mm through stamping and bending.

The utility model provides a teaching aid for showing engine sensor, including base, panel, terminal subassembly, transformer, sensor module, this teaching aid simple structure on the one hand, production efficiency is high, the appearance is pleasing to the eye, the demonstration is effectual, this teaching aid convenient to carry of on the other hand only needs alone alright, need not two people move and lift to improve the utilization ratio of this teaching aid, the overall arrangement of panel upper surface is reasonable simultaneously, compact, and the impression is effectual, space utilization is high. In addition, the original vehicle circuit diagram of the first sensor and the original vehicle circuit diagram of the second sensor are drawn on the panel, the first sensor and the second sensor which are hidden in the inner position of the vehicle are fixed on the panel through the connecting pieces, and modular teaching of a teacher enables students to observe the shapes and the structures of the first sensor and the second sensor, so that not only can the circuit principles of the first sensor and the second sensor be observed, but also the numerical values of the first sensor and the second sensor can be measured through a testing instrument, the learning interest of the students is enhanced, and meanwhile, training preparation is made for subsequent teaching.

The first embodiment is as follows:

based on above-mentioned design, as shown in fig. 1-3, for the utility model provides a teaching aid structure schematic diagram in the scene of concrete application for temperature detect switch and coolant temperature sensor, as shown in fig. 1, this teaching aid includes:

the base 1 is of a thin-wall uncovered box structure as shown in fig. 3, and comprises a bottom plate 11, a front plate 12, a rear plate 13 and side plates 14, wherein the bottom plate 11 is rectangular, the front plate 12 is positioned in front of the bottom plate 11, the height of the front plate 12 is h1, the rear plate 13 is positioned behind the bottom plate 11, the rear plate 13 is parallel to the front plate 12, the height of the rear plate 13 is h2, wherein h2 is greater than h1, the number of the side plates 14 is two, the two side plates are symmetrically positioned at the left side and the right side of the bottom plate 11, the side plates 14 are in a right trapezoid shape, the front end and the rear end of each side plate 14 are respectively fixedly connected with the front plate 12 and the rear plate 13, and the included angle between the upper end face of each side plate 14 and the horizontal plane is 15 degrees;

the panel 2 is positioned on the upper side of the base 1 as shown in fig. 2, the upper surface of the panel 2 is sequentially divided into a title area 21, a component placing area 22 and a circuit principle area 23 from top to bottom, and Chinese characters are printed on the title area 21;

the component placement area 22 is provided with a fixing hole 221, a first threading hole 222 and a second threading hole 223;

a first schematic diagram 231, a second schematic diagram 232 and a power input diagram 233 are imprinted on the circuit schematic area 23, the first schematic diagram 231 is located on the left side of the second schematic diagram 232, both the first schematic diagram 231 and the second schematic diagram 232 are provided with a detection hole 234, the power input diagram 233 is located between the first schematic diagram 231 and the second schematic diagram 232, and the power input diagram 233 is provided with a positive electrode hole 235 and a negative electrode hole 236;

the terminal assembly 3, as shown in fig. 1, includes a positive terminal 31, a negative terminal 32 and a plurality of detection terminals 33, wherein the positive terminal 31 is inserted into the positive hole 235, the negative terminal 32 is inserted into the negative hole 236, and the detection terminals 33 are inserted into the detection holes 234;

a transformer (not shown) fixed to an upper end surface of the base plate 11, the transformer being electrically connected to the positive terminal 31 and the negative terminal 32 by connection wires, respectively;

the sensor assembly 4, as shown in fig. 1, includes a first sensor 41, a second sensor 42, and a connecting member 43, wherein the connecting member 43 is fixed on the component placement area 22, the first sensor 41 is fixed on the left side of the connecting member 43, and a connecting wire of the first sensor 41 passes through the first threading hole 222 to be electrically connected to the detection terminal 33 and the transformer on the first schematic diagram 231, respectively;

the second sensor 42 is fixed to the right side of the connecting member 43, and the connecting wires of the second sensor 42 pass through the second wire passing hole 223 and are electrically connected to the detecting terminal 33 and the transformer on the second schematic diagram 232, respectively.

Further, as shown in fig. 1, when the first sensor 41 is a temperature controlled switch, the second sensor 42 is a coolant temperature sensor.

Further, as shown in fig. 2, the header area 21 is printed with chinese characters, which are a temperature control switch and a temperature of the cooling liquid.

Further, the base 1 is made of metal, plastic or wood;

if the base 1 is made of metal, the bottom plate 11, the front plate 12, the rear plate 13 and the side plates 14 are formed by stamping, bending and welding sheet metal materials with the thickness of 1 mm.

Further, a protective layer is sprayed on the surface of the base 1.

Further, the material of the panel 2 is not limited to acryl.

Further, as shown in fig. 1, the cross section of the connecting member 43 is an L-shaped structure, one end of the connecting member 43 is fixedly connected to the first sensor 41 or the second sensor 42 through a bolt and a nut, and the other end of the connecting member 43 is fixedly connected to the panel 2 through the fixing hole 221 through a bolt and a nut.

Further, the teaching aid further comprises four foot pads 5 and handles (not shown), as shown in fig. 1, the four foot pads 5 are symmetrically fixed on the lower end face of the bottom plate 11, the foot pads 5 are of an inverted truncated cone-shaped structure, and the height of the foot pads 5 is not less than 10 mm;

the number of the handles is two, and the handles are symmetrically fixed on the outer side surface of the side plate 14.

Example two:

based on above-mentioned design, as shown in fig. 3-5, for the utility model provides a teaching aid structure schematic diagram in the concrete application scene for knock sensor and pressure sensor admits air, as shown in fig. 1, this teaching aid includes:

the panel 2 is positioned on the upper side of the base 1 as shown in fig. 5, the upper surface of the panel 2 is sequentially divided into a title area 21, a component placing area 22 and a circuit principle area 23 from top to bottom, and Chinese characters are printed on the title area 21;

the terminal assembly 3 comprises a positive terminal 31, a negative terminal 32 and a plurality of detection terminals 33, wherein the positive terminal 31 is inserted into the positive hole 235, the negative terminal 32 is inserted into the negative hole 236, and the detection terminals 33 are inserted into the detection holes 234;

the sensor assembly 4, as shown in fig. 4, includes a first sensor 41, a second sensor 42, and a connecting member 43, wherein the connecting member 43 is fixed on the component placement area 22, the first sensor 41 is fixed on the left side of the connecting member 43, and a connecting wire of the first sensor 41 passes through the first threading hole 222 to be electrically connected to the detection terminal 33 and the transformer on the first schematic diagram 231, respectively;

Further, as shown in fig. 4, when the first sensor 41 is a knock sensor, the second sensor 42 is an intake pressure sensor.

Further, as shown in fig. 5, the header area 21 is printed with chinese characters, i.e., a knock sensor and an intake pressure sensor.

Further, the base 1 is made of metal, plastic or wood;

Further, a protective layer is sprayed on the surface of the base 1.

Further, the material of the panel 2 is not limited to acryl.

Further, as shown in fig. 4, the cross section of the connecting member 43 is an L-shaped structure, one end of the connecting member 43 is fixedly connected to the first sensor 41 or the second sensor 42 through a bolt and a nut, and the other end of the connecting member 43 is fixedly connected to the panel 2 through the fixing hole 221 through a bolt and a nut.

Further, the teaching aid further comprises four foot pads 5 and handles (not shown), as shown in fig. 4, the four foot pads 5 are symmetrically fixed on the lower end face of the bottom plate 11, the foot pads 5 are of an inverted truncated cone-shaped structure, and the height of the foot pads 5 is not less than 10 mm;

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A teaching aid for displaying an engine sensor, comprising:

the base (1) is of a thin-wall uncovered box structure and comprises a bottom plate (11), a front plate (12), a rear plate (13) and side plates (14), wherein the bottom plate (11) is rectangular, the front plate (12) is located in front of the bottom plate (11), the height of the front plate (12) is h1, the rear plate (13) is located behind the bottom plate (11), the rear plate (13) is parallel to the front plate (12), the height of the rear plate (13) is h2, h2 is greater than h1, the number of the side plates (14) is two, the side plates are symmetrically located on the left side and the right side of the bottom plate (11), the side plates (14) are in a right-angled trapezoid shape, the front end and the rear end of each side plate (14) are fixedly connected with the front plate (12) and the rear plate (13), and the included angle between the upper end face of each side plate (14) and the horizontal plane is 8-35 degrees;

the panel (2) is positioned on the upper side of the base (1), the upper surface of the panel (2) is sequentially divided into a title area (21), a component placing area (22) and a circuit principle area (23) from top to bottom, and Chinese characters are printed on the title area (21);

a fixing hole (221), a first threading hole (222) and a second threading hole (223) are formed in the component placing area (22);

a first schematic diagram (231), a second schematic diagram (232) and a power input diagram (233) are printed on the circuit principle area (23), the first schematic diagram (231) is located on the left side of the second schematic diagram (232), detection holes (234) are formed in the first schematic diagram (231) and the second schematic diagram (232), the power input diagram (233) is located between the first schematic diagram (231) and the second schematic diagram (232), and a positive electrode hole (235) and a negative electrode hole (236) are formed in the power input diagram (233);

the terminal assembly (3) comprises a positive terminal (31), a negative terminal (32) and a plurality of detection terminals (33), wherein the positive terminal (31) is inserted into the positive hole (235), the negative terminal (32) is inserted into the negative hole (236), and the detection terminals (33) are inserted into the detection holes (234);

the transformer is fixed on the upper end face of the bottom plate (11) and is respectively and electrically connected with the positive terminal (31) and the negative terminal (32) through connecting wires;

the sensor assembly (4) comprises a first sensor (41), a second sensor (42) and a connecting piece (43), the connecting piece (43) is fixed on the component placing area (22), the first sensor (41) is fixed on the left side of the connecting piece (43), and a connecting line of the first sensor (41) penetrates through the first threading hole (222) to be respectively and electrically connected with the detection terminal (33) on the first schematic diagram (231) and the transformer;

the second sensor (42) is fixed on the right side of the connecting piece (43), and a connecting line of the second sensor (42) penetrates through the second threading hole (223) to be respectively electrically connected with the detection terminal (33) on the second schematic diagram (232) and the transformer.

2. A teaching aid for displaying engine sensors as claimed in claim 1, wherein when the first sensor (41) is a temperature controlled switch then the second sensor (42) is a coolant temperature sensor.

3. A teaching aid for displaying engine sensors as claimed in claim 2, wherein the title area (21) is imprinted with the chinese characters temperature control switch, coolant temperature.

4. A teaching aid for displaying engine sensors as claimed in claim 1, wherein when the first sensor (41) is a knock sensor then the second sensor (42) is an intake pressure sensor.

5. A teaching aid for displaying engine sensors as claimed in claim 4, wherein the heading area (21) is imprinted with Chinese characters for knock sensor, intake pressure sensor.

6. A teaching aid for displaying engine sensors according to claim 1, characterized in that the base (1) is made of metal, or plastic, or wood;

if the base (1) is made of metal, the bottom plate (11), the front plate (12), the rear plate (13) and the side plates (14) are formed by stamping, bending and welding sheet metal materials with the thickness of 0.8-1.5 mm;

if the base (1) is made of plastic, the bottom plate (11), the front plate (12), the rear plate (13) and the side plates (14) are integrally formed by injection molding through an injection molding machine;

if the bottom plate (11) is made of wood, the bottom plate (11), the front plate (12), the rear plate (13) and the side plates (14) are formed by assembling and connecting screws.

7. A teaching aid for displaying engine sensors as claimed in claim 6, characterized in that when the base (1) is made of metal, the surface of the base (1) is coated with a protective layer.

8. A teaching aid for displaying engine sensors as claimed in claim 1, wherein the material of the panel (2) is not limited to acrylic, toughened glass, PET, PC, PVC, ABS.

9. A teaching aid for displaying engine sensors as claimed in claim 1, wherein the cross-section of the connecting member (43) is an L-shaped structure, one end of the connecting member (43) is fixedly connected with the first sensor (41) or the second sensor (42) through a bolt and a nut, and the other end of the connecting member (43) is fixedly connected with the panel (2) through the fixing hole (221) through a bolt and a nut.

10. The teaching aid for showing the engine sensor is characterized by further comprising four foot pads (5) and a handle, wherein the foot pads (5) are symmetrically fixed on the lower end face of the bottom plate (11), the foot pads (5) are of an inverted truncated cone-shaped structure, and the height of the foot pads (5) is not less than 10 mm;

the number of the handles is two, and the handles are symmetrically fixed on the outer side surface of the side plate (14).