A modular assembly motor teaching demonstration device

Abstract

This invention relates to the field of teaching instrument technology and discloses a combined assembled motor teaching demonstration device, including a housing, a transmission mechanism, a power mechanism, and a clamping mechanism. Two vertical plates and a set of guide rails are fixedly connected to the inner wall of the bottom of the housing. A motor is mounted on one side of the guide rails, and a gear is fixedly connected to the output end of the motor. The transmission mechanism includes a ratchet and a transmission part, with a bracket for mounting different rotors positioned between the ratchet and the ratchet. The power mechanism includes a rack and a crossbar, with the rack positioned below the gear and connected to the gear transmission. The crossbar is connected to the transmission mechanism. The clamping mechanism includes two fixed plates and the motor housing. This invention uses the motor to drive the power mechanism, which in turn drives the transmission mechanism to change the rotor model. Simultaneously, it can drive the clamping mechanism to control the opening and closing of the motor housing, enabling rapid disassembly and assembly of the motor. Different motor models can be used, reducing the space occupied in the classroom.

Description

Technical Field

[0001] This invention relates to the field of teaching instrument technology, specifically to a combined assembled motor teaching demonstration device. Background Technology

[0002] With the continuous improvement of the national education level, in order to improve students' practical skills, universities usually equip themselves with various teaching instruments, among which the application of motor teaching demonstration devices is particularly widespread.

[0003] However, the teaching demonstration function of traditional servo motor teaching demonstration devices is relatively simple. In order to ensure that students have a comprehensive grasp of motor control knowledge, multiple different motor teaching demonstration devices need to be configured. Therefore, it is necessary to prepare a variety of different models of motors, which undoubtedly requires a large amount of teaching space and makes it impossible to allocate and utilize the teaching space reasonably. Therefore, a combined assembly motor teaching demonstration device is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a combined assembly-type motor teaching demonstration device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a modular assembly-type motor teaching demonstration device, comprising a housing, on which two vertical plates and a set of guide rails are fixedly connected to the inner wall of the bottom of the housing. The guide rails are located between the two vertical plates, and a motor is mounted on one side of the guide rails. The motor is fixedly connected to the inner wall of the bottom of the housing via a base fixedly connected to its side wall. A gear is fixedly connected to the output end of the motor. The device also includes: a transmission mechanism comprising a ratchet and a transmission part; the ratchet is fixedly mounted at both ends of a sleeve, which is rotatably connected to a cylindrical shaft, which is fixedly mounted between the two vertical plates; the transmission part is located below the ratchet; a power mechanism comprising a rack and a crossbar; the rack is located below the gear and is connected to the gear for transmission; the crossbar is located between the transmission part and the rack; and a clamping mechanism comprising two fixed plates and a motor housing body. The fixed plates are fixedly mounted on the side wall of the housing away from the vertical plates, and the motor housing body is located on the side of the fixed plates away from the fixed plates and near the inner wall of the housing.

[0007] Furthermore, mounting brackets are fixedly connected to both ends of the sleeve. The mounting brackets are located between two ratchet wheels. Bearings are fixedly installed on the ends of the mounting brackets away from the sleeve. Rotors of different models are rotatably installed between the two bearings located at the same position. A commutator is fixedly installed on one end of the rotor.

[0008] Furthermore, the inner wall of the ratchet has several slots through the sleeve, and both ends of the cylindrical shaft have grooves. Rotating teeth are rotatably connected inside the grooves, and a spring clamp is fixedly installed between the end of the rotating teeth near the inner wall of the groove and the inner wall of the groove.

[0009] Furthermore, the transmission unit includes a pull rod and a push rod, both of which are equipped with locking teeth. The pull rod and the push rod are both connected to a ratchet via locking teeth that are fixedly connected thereto. A tension spring is fixedly connected between the pull rod and the push rod. The ends of the pull rod and the push rod away from the ratchet are rotatably connected to a round shaft, and the round shaft is fixedly installed at one end of a vertical slide rod.

[0010] Furthermore, each of the vertical plates is fixedly connected to a vertical slide rail on the side closest to it. A connecting block is fixed to the side wall of the vertical slide rail away from the vertical plate. A circular plate is fixedly connected to the end of the connecting block away from the vertical slide rail. A vertical slider is fixedly connected to the side of the vertical slide rod close to the vertical slide rail, and the vertical slide rod is slidably connected to the vertical slide rail through the vertical slider. An installation groove is opened inside the vertical slide rod. The circular plate is slidably disposed inside the installation groove. A return spring is fixedly connected between the upper surface of the circular plate and the upper inner wall of the installation groove.

[0011] Furthermore, a connecting post is fixedly connected to the end of the rack away from the vertical plate, and transverse grooves are opened on both sides of the end of the rack near the vertical plate. An arc-shaped opening is opened through the inner wall of the transverse groove through the upper surface of the rack. The rack is slidably mounted on the sliding plate. A limit cover plate is fixedly connected to the upper part of the middle of the sliding plate. A baffle is fixedly connected to the end of the sliding plate near the vertical plate. A compression spring is fixedly connected to the side of the baffle near the limit cover plate. The sliding plate is slidably mounted above the guide rail.

[0012] Furthermore, the crossbar is fixedly installed at the lower end of the side where the vertical slide bars are close to each other, and a rotating plate is rotatably connected to the middle of the crossbar. Short columns are fixedly connected to the inner sidewall of the rotating plate at the end away from the crossbar, and the short columns are slidably arranged inside the transverse groove.

[0013] Furthermore, the fixed plate has a horizontal first sliding groove and two vertical second sliding grooves inside. The first sliding groove is located between the two second sliding grooves. Two clamping plates are fixedly connected inside the fixed plate. A square column is slidably arranged between the clamping plates. A pair of rotating plates are rotatably connected to one end of the square column away from the inside of the fixed plate.

[0014] Furthermore, the motor housing body is composed of two halves of the motor housing spliced ​​together. The two motor housing halves of the motor housing body are respectively fixedly connected to clamping rod one and clamping rod two. A square groove is opened in the middle of clamping rod one. A rotating rod one is rotatably connected through one side wall of the clamping rod inside the square groove. The end of clamping rod two away from the motor housing body passes through the square groove and is rotatably connected to rotating rod one. Rotating rod two is rotatably connected to the ends of clamping rod one and clamping rod two away from the motor housing body. Rotating rod one and rotating rod two are slidably disposed inside the first sliding groove and the second sliding groove respectively. The rotating rod two located on clamping rod two is rotatably connected to the end of the square column away from the rotating plate.

[0015] The present invention has the following beneficial effects:

[0016] (1) By setting up a power mechanism, the present invention can prioritize the movement of the clamping mechanism when the motor is working, and then make the transmission mechanism work, thus preventing the collision between the motor housing and the rotor and causing damage to the device. Furthermore, by setting up a sliding plate, the limiting cover plate can limit the short column, control the opening and closing of the arc-shaped opening, and make the transmission mechanism reset first, ensuring the stability of the motor during reassembly.

[0017] (2) By setting up a transmission mechanism, the vertical slide bar can move, which can drive the push rod and pull rod to rotate the ratchet. The rotating teeth prevent it from rotating in the opposite direction, thus preventing the rotor from colliding with the inner wall of the motor housing and causing damage to the device. Furthermore, when the ratchet rotates, the rotor to be installed inside the motor can be replaced, increasing the practicality of the device.

[0018] (3) By setting up a clamping mechanism, the present invention can cause clamping rod one and clamping rod two to rotate while the square column pulls the clamping rod two to rotate, and cause the upper and lower shells of the motor housing to separate and move away from the rotor, thus preventing the rotor from colliding with the motor housing and effectively extending the service life of the device.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the transmission mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the transmission mechanism of the present invention;

[0025] Figure 5 This is a schematic diagram of the support structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the ratchet of the present invention;

[0027] Figure 7 This is a schematic diagram of the power mechanism of the present invention;

[0028] Figure 8 This is a schematic diagram of the clamping mechanism of the present invention;

[0029] Figure 9 This is a schematic diagram of the fixing plate structure of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] In the diagram: 1. Housing; 11. Vertical plate; 111. Vertical slide rail; 112. Connecting block; 113. Circular plate; 12. Guide rail; 13. Motor; 131. Base; 132. Gear; 2. Ratchet; 201. Slot; 21. Sleeve; 22. Cylindrical shaft; 221. Groove; 222. Rotating gear; 223. Spring clamp; 23. Mounting bracket; 231. Bearing; 24. Rotor; 25. Commutator; 3. Transmission unit; 31. Pull rod; 32. Push rod; 321. Circular shaft; 33. Tension spring; 34. Vertical slide rod; 341. Vertical 342. Sliding block; 35. Mounting slot; 4. Return spring; 4. Rack; 401. Connecting column; 402. Transverse groove; 403. Arc-shaped opening; 41. Sliding plate; 411. Limiting cover plate; 412. Baffle; 42. Compression spring; 5. Crossbar; 51. Rotating plate; 52. Short column; 6. Fixing plate; 601. First sliding groove; 602. Second sliding groove; 61. Clamping plate; 62. Square column; 63. Rotating plate; 7. Motor housing body; 71. Clamping rod one; 72. Clamping rod two; 711. Square groove; 712. Rotating rod one; 73. Rotating rod two. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-9 As shown, this invention is a modular assembly-type motor teaching demonstration device, including a housing 1. Two vertical plates 11 and a set of guide rails 12 are fixedly connected to the inner wall of the bottom of the housing 1. The guide rails 12 are located between the two vertical plates 11. A motor 13 is arranged on one side of the guide rails 12. The motor 13 is fixedly connected to the inner wall of the bottom of the housing 1 via a base 131 fixedly connected to its side wall. A gear 132 is fixedly connected to the output end of the motor 13. The device also includes a transmission mechanism, which includes a ratchet 2 and a transmission part 3. The ratchet 2 is fixedly installed at both ends of a sleeve 21. The sleeve 21 rotates... The transmission part 3 is located below the ratchet 2 and is connected to the cylindrical shaft 22. The cylindrical shaft 22 is fixedly installed between the two vertical plates 11. The power mechanism includes a rack 4 and a crossbar 5. The rack 4 is located below the gear 132 and is connected to the gear 132 for transmission. The crossbar 5 is located between the transmission part 3 and the rack 4. The clamping mechanism includes two fixing plates 6 and a motor housing body 7. The fixing plates 6 are fixedly installed on the side wall of the box 1 away from the vertical plate 11. The motor housing body 7 is located on the side of the fixing plates 6 away from the fixing plates 6 and near the inner wall of the box 1.

[0034] The sleeve 21 is fixedly connected to two ends of the mounting bracket 23, which is located between two ratchet 2. The end of the mounting bracket 23 away from the sleeve 21 is fixedly mounted with a bearing 231. Rotors 24 of different models are rotatably mounted between the two bearings 231 located in the same position. A commutator 25 is fixedly mounted on one end of the rotor 24. The purpose of this arrangement is to facilitate the quick replacement of different models of motors by replacing the rotor 24.

[0035] The inner wall of the ratchet 2 has several slots 201 through the sleeve 21. Both ends of the cylindrical shaft 22 have grooves 221. Rotating teeth 222 are rotatably connected inside the grooves 221. A spring clamp 223 is fixedly installed between the end of the rotating teeth 222 near the inner wall of the groove 221 and the inner wall of the groove 221. The purpose of this setting is to facilitate the limiting of the ratchet 2 and prevent it from rotating in the opposite direction, which would damage the device.

[0036] The transmission unit 3 includes a pull rod 31 and a push rod 32, both equipped with locking teeth. The pull rod 31 and the push rod 32 are connected to the ratchet 2 via locking teeth that are fixedly connected to them. A tension spring 33 is fixedly connected between the pull rod 31 and the push rod 32. The ends of the pull rod 31 and the push rod 32 away from the ratchet 2 are rotatably connected to a round shaft 321. The round shaft 321 is fixedly installed at one end of a vertical slide bar 34. The purpose of this arrangement is to facilitate the sliding of the vertical slide bar 34 so that the pull rod 31 and the push rod 32 can drive the ratchet 2 to rotate, making it convenient to replace the rotor 24.

[0037] Vertical slide rails 111 are fixedly connected to the sides of the vertical plates 11 that are close to each other. A connecting block 112 is fixedly connected to the side wall of the vertical slide rail 111 away from the vertical plate 11. A circular plate 113 is fixedly connected to the end of the connecting block 112 away from the vertical slide rail 111. A vertical slider 341 is fixedly connected to the side of the vertical slide rod 34 that is close to the vertical slide rail 111. The vertical slide rod 34 is slidably connected to the vertical slide rail 111 through the vertical slider 341. An installation groove 342 is opened inside the vertical slide rod 34. The circular plate 113 is slidably disposed inside the installation groove 342. A return spring 35 is fixedly connected between the upper surface of the circular plate 113 and the upper inner wall of the installation groove 342. The purpose of this arrangement is to facilitate the reset of the transmission mechanism.

[0038] A connecting column 401 is fixedly connected to the end of the rack 4 away from the vertical plate 11. Horizontal grooves 402 are provided on both sides of the end of the rack 4 near the vertical plate 11. An arc-shaped opening 403 is provided through the inner wall of the horizontal groove 402, penetrating the upper surface of the rack 4. The rack 4 is slidably mounted on the sliding plate 41. A limit cover plate 411 is fixedly connected to the upper middle part of the sliding plate 41. A baffle 412 is fixedly connected to the end of the sliding plate 41 near the vertical plate 11. A compression spring 42 is fixedly connected to the side of the baffle 412 near the limit cover plate 411. This arrangement facilitates the reset of the power mechanism. The sliding plate 41 is slidably mounted above the guide rail 12. This arrangement is intended to limit the short column 52 using the limit cover plate 411, facilitating the movement of the rotating plate 51 and controlling the short column 52 to disengage from the horizontal groove 402, thus resetting the transmission mechanism.

[0039] The crossbar 5 is fixedly installed on the lower end of the side of the vertical slide bar 34 that are close to each other. The middle of the crossbar 5 is rotatably connected to the rotating plate 51. The inner side wall of the rotating plate 51 away from the crossbar 5 is fixedly connected to the short column 52. The short column 52 is slidably set inside the transverse groove 402. The purpose of this arrangement is to facilitate the use of the rack 4 to pull the short column 52 to make the rotating plate 51 rotate and move down.

[0040] The fixed plate 6 has a horizontal first slide groove 601 and two vertical second slide grooves 602 inside. The first slide groove 601 is located between the two second slide grooves 602. Two clamping plates 61 are fixedly connected inside the fixed plate 6. A square post 62 is slidably arranged between the clamping plates 61. A pair of rotating plates 63 are rotatably connected to one end of the square post 62 away from the inside of the fixed plate 6. The purpose of this arrangement is to facilitate the installation of clamping rod 1 71 and clamping rod 2 72, and to use the movement of the square post 62 to pull clamping rod 1 71 and clamping rod 2 72 to rotate.

[0041] The motor housing body 7 is composed of two halves of the motor housing spliced ​​together. The two motor housings of the motor housing body 7 are respectively fixedly connected to clamping rod 1 71 and clamping rod 2 72. A square groove 711 is opened in the middle of clamping rod 1 711. A rotating rod 1 712 is rotatably connected through the side wall of clamping rod 1 711 inside the square groove 711. The end of clamping rod 2 72 away from the motor housing body 7 passes through the square groove 711 and is rotatably connected to rotating rod 1 712. Rotating rod 2 73 is rotatably connected to the ends of clamping rod 1 71 and clamping rod 2 72 away from the motor housing body 7. Rotating rod 1 712 and rotating rod 2 73 are respectively slidably arranged inside the first slide groove 601 and the second slide groove 602. The rotating rod 2 73 located on clamping rod 2 72 is rotatably connected to the end of square column 62 away from rotating plate 63. The purpose of this arrangement is to facilitate the opening and closing of the motor housing body 7 by using the movement of clamping rod 1 71 and clamping rod 2 72.

[0042] When in use, if the motor model needs to be changed, the motor 13 can be started. The motor 13 rotates forward, and the rack 4 is driven to move towards the side closer to the vertical plate 11 through the gear 132. First, the short column 52 slides inside the transverse groove 402. At this time, the connecting column 401 on the rack 4 pulls the rotating plate 63 to rotate, and the rotating plate 63 pulls the square column 62 down, thereby causing the clamping rod 72 to rotate. Since both the clamping rod 71 and the clamping rod 72 can rotate around the rotating rod 712, the clamping rod 71 and the clamping rod 72 can open up at the end near the motor housing body 7, so that the motor housing body 7 can be separated from the rotor 24. At the same time, the rotating rod 73 on the clamping rod 71 and the clamping rod 72 slides inside the second slide groove 602 and moves away from each other. The rotating rod 712 moves towards the side closer to the fixed plate 6 inside the first slide groove 601, so that the motor housing body 7 is away from the rotor 24, which facilitates the subsequent replacement of the rotor 24.

[0043] Afterwards, the short column 52 slides to the inner wall of the transverse groove 402 near the connecting column 401, and is limited by the limiting cover plate 411 to prevent the short column 52 from disengaging from the rack 4. The rack 4 continues to move towards the side near the vertical plate 11, which can drive the sliding plate 41 to move synchronously. At this time, the rotating plate 51 will pull the vertical slide bar 34 downward through the crossbar 5. While the vertical slide bar 34 moves downward, the pull rod 31 will pull the ratchet 2 to rotate, the return spring 35 is compressed, the tension spring 33 is extended, and the pull rod 31 and the push rod 32 are kept in close contact with the ratchet 2. When the rack 4 continues to move and pushes the sliding plate 41 to contact the side wall of the housing 1, the compression spring 42 is compressed, and the limiting cover plate 411 moves away from the arc-shaped opening 403. The vertical slide bar 34 is pushed back to its original position by extending the vertical slide bar 35. The rotating plate 51 leaves the transverse groove 402 from the arc-shaped opening 403 on the side of the rack 4 near the connecting column 401. At this time, the vertical slide bar 34 moves upward, which pushes the transmission part 3 upward. The push rod 32 pushes the ratchet 2 to rotate again, replacing the rotor 24. Then the motor 13 reverses, causing the clamping mechanism to run in the opposite direction and driving the power mechanism to reset. The reset of the clamping mechanism allows the motor housing body 7 to be assembled with the rotor 24, ensuring that it can work normally. The setting of the rotating teeth 222 inside the slot 201 and groove 221 and the spring clamp 223 prevents the ratchet 2 from rotating in the opposite direction, causing the rotor 24 to collide with the inner wall of the motor housing body 7 and causing damage to the rotor 24, thus increasing the practicality of the device.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A modular assembly-type motor teaching demonstration device, comprising a housing (1), wherein two vertical plates (11) and a set of guide rails (12) are fixedly connected to the inner wall of the bottom of the housing (1), the guide rails (12) are located between the two vertical plates (11), a motor (13) is provided on one side of the guide rails (12), the motor (13) is fixedly connected to the inner wall of the bottom of the housing (1) via a base (131) fixedly connected to its side wall, and a gear (132) is fixedly connected to the output end of the motor (13), characterized in that, Also includes: The transmission mechanism includes a ratchet (2) and a transmission part (3). The ratchet (2) is fixedly installed at both ends of the sleeve (21). The sleeve (21) is rotatably connected to the cylindrical shaft (22). The cylindrical shaft (22) is fixedly installed between two vertical plates (11). The transmission part (3) is located below the ratchet (2). The power mechanism includes a rack (4) and a crossbar (5). The rack (4) is located below the gear (132) and is connected to the gear (132) in a transmission. The crossbar (5) is located between the transmission part (3) and the rack (4). The clamping mechanism includes two fixing plates (6) and a motor housing body (7). The fixing plates (6) are fixedly installed on the side wall of the box (1) away from the vertical plate (11). The motor housing body (7) is located on the side of the fixing plates (6) away from the fixing plates (6) and close to the inner wall of the box (1). The fixed plate (6) has a horizontal first sliding groove (601) and two vertical second sliding grooves (602) inside. The first sliding groove (601) is located between the two second sliding grooves (602). Two clamping plates (61) are fixedly connected inside the fixed plate (6). A square column (62) is slidably arranged between the clamping plates (61). A pair of rotating plates (63) are rotatably connected to one end of the square column (62) away from the inside of the fixed plate (6). The motor housing body (7) is composed of two half motor housings spliced ​​together. The two motor housings of the motor housing body (7) are respectively fixedly connected to clamping rod one (71) and clamping rod two (72). A square groove (711) is opened in the middle of the clamping rod one (711). A rotating rod one (712) is rotatably connected through the side wall of the clamping rod one (711). The end of the second clamping rod (72) away from the motor housing body (7) passes through the square groove (711) and is rotatably connected to the first rotating rod (712). The ends of the first clamping rod (71) and the second clamping rod (72) away from the motor housing body (7) are both rotatably connected to the second rotating rod (73). The first rotating rod (712) and the second rotating rod (73) are slidably disposed inside the first sliding groove (601) and the second sliding groove (602) respectively. The second rotating rod (73) located on the second clamping rod (72) is rotatably connected to the end of the square column (62) away from the rotating plate (63). The sleeve (21) is fixedly connected to two ends of a mounting bracket (23). The mounting bracket (23) is located between two ratchet wheels (2). The end of the mounting bracket (23) away from the sleeve (21) is fixedly mounted with a bearing (231). Rotors (24) of different models are rotatably mounted between the two bearings (231) located at the same position. A commutator (25) is fixedly mounted at one end of the rotor (24). The transmission part (3) includes a pull rod (31) and a push rod (32) both equipped with teeth. The pull rod (31) and the push rod (32) are connected to the ratchet (2) through the teeth fixedly connected thereto. A tension spring (33) is fixedly connected between the pull rod (31) and the push rod (32). The ends of the pull rod (31) and the push rod (32) away from the ratchet (2) are rotatably connected to a round shaft (321). The round shaft (321) is fixedly installed at one end of a vertical slide rod (34). The vertical plates (11) are each fixedly connected to a vertical slide rail (111) on the side closest to each other. A connecting block (112) is fixedly connected to the side wall of the vertical slide rail (111) away from the vertical plate (11). A circular plate (113) is fixedly connected to the end of the connecting block (112) away from the vertical slide rail (111). A vertical slider (341) is fixedly connected to the side of the vertical slide rod (34) close to the vertical slide rail (111). The vertical slide rod (34) is slidably connected to the vertical slide rail (111) through the vertical slider (341). An installation groove (342) is opened inside the vertical slide rod (34). The circular plate (113) is slidably disposed inside the installation groove (342). A return spring (35) is fixedly connected between the upper surface of the circular plate (113) and the inner wall above the installation groove (342). A connecting column (401) is fixedly connected to one end of the rack (4) away from the vertical plate (11). A transverse groove (402) is provided on both sides of one end of the rack (4) close to the vertical plate (11). An arc-shaped opening (403) is provided through the inner wall of the transverse groove (402) penetrating the upper surface of the rack (4). The rack (4) is slidably mounted on the sliding plate (41). A limit cover plate (411) is fixedly connected above the middle part of the sliding plate (41). A baffle (412) is fixedly connected to one end of the sliding plate (41) close to the vertical plate (11). A compression spring (42) is fixedly connected to one side of the baffle (412) close to the limit cover plate (411). The sliding plate (41) is slidably mounted above the guide rail (12). The crossbar (5) is fixedly installed on the lower end of the side of the vertical slide bar (34) that are close to each other. A rotating plate (51) is rotatably connected to the middle of the crossbar (5). Short columns (52) are fixedly connected to the inner side wall of the rotating plate (51) away from the crossbar (5). The short columns (52) are slidably arranged inside the transverse groove (402).

2. The modular assembly-type motor teaching demonstration device according to claim 1, characterized in that: The inner wall of the ratchet (2) has several slots (201) through the sleeve (21). Both ends of the cylindrical shaft (22) have grooves (221). Rotating teeth (222) are rotatably connected inside the grooves (221). A spring clamp (223) is fixedly installed between the end of the rotating teeth (222) near the inner wall of the groove (221) and the inner wall of the groove (221).

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