Electromagnetic crane teaching aid

Abstract

The utility model relates to an electromagnetic crane teaching aid, including base, motor no. Motor no. The utility model discloses an electromagnetic crane teaching aid, including base, motor no. Motor no. The utility model discutes an electromagnetic crane teaching aid, including base, motor no.

Description

Technical Field

[0001] This utility model belongs to the field of teaching aids technology, and specifically relates to an electromagnetic crane teaching aid. Background Technology

[0002] Utility model patent CN2254223Y discloses an electromagnetic crane, including a crane with a lifting boom. The four corners of the chassis are bolted to the landing foot plate. The four claws of the shaft fixing frame extend outward and are fixedly connected to the chassis. The rotating shaft passes through the chassis, the shaft fixing frame, and the center hole of the bottom support of the rotating box. One end is bolted to the chassis, and the other end is bolted to the rotating box. The counterweight chamber is fixedly connected to the bottom of the rotating box. The rotating box and the rotating box cover are hinged. Two sets of brackets and a super-heavy boom bracket are fixedly connected to the box cover. The two sets of brackets are respectively hinged to a wheel axle with a crank wheel and a single-arm wheel axle. Fastening screws are threaded to the brackets. The lifting boom is bolted to the lifting boom bracket. The lifting boom is divided into two sections. The other end of the section with hooks is a fan-shaped surface with several holes distributed around its circumference. The support frame, which is fixed to the lifting arm, is hinged. A fixed pulley is connected to the end of the lifting arm. The two ends of the lifting tension rope are connected to the single-arm axle and a ring welded to the lifting arm, respectively. One end of the lifting rope is connected to the axle with a crank pulley, and the other end passes through the support pulley, fixed pulley, and hooked movable pulley to hook onto the hook on the lifting arm. A 6V-12V DC power supply, converted and rectified, or an AC / DC power supply composed of a battery pack, and a speaker with a music chip are fixed inside the rotating box. The power plug extends from inside the box. Switches and indicator lights are mounted on the box body, and an electromagnetic power socket extends from the box cover. An electromagnetic chuck, consisting of an electromagnet core, an electromagnetic coil wound around it, and a chuck protective cover, and several iron weights of different shapes are also included as demonstration pieces.

[0003] The technical solution provided in this application is difficult to source materials for, and some parts need to be customized in factories. Due to its complex structure, it can only be demonstrated by teachers in the classroom. Students cannot participate in the production or operate it independently, which cannot meet the needs of teachers for convenient teaching and students for self-production. Utility Model Content

[0004] In view of this, the purpose of this utility model is to address the shortcomings of the existing technology by providing an electromagnetic crane teaching aid that is simple in structure, easy to obtain materials, easy to operate, easy to promote, and conducive to students' intuitive observation of experimental phenomena.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An electromagnetic crane teaching aid includes a base, a first motor, a transmission mechanism, a pull rope, a support rod, a pulley, and an electromagnet. A rotating platform is provided on the top of the base. The first motor is fixedly mounted on the rotating platform. The support rod is inclinedly mounted on the rotating platform. The pulley is located on the top of the support rod. The first motor is connected to one end of the pull rope through the transmission mechanism to control its extension and retraction. The other end of the pull rope passes through the pulley and is connected to the electromagnet. The base is equipped with a second motor and three relays. The second motor drives the rotating table to rotate, and the first motor, the second motor, and the electromagnet are controlled by the three relays.

[0006] To better realize this utility model, further optimizations are made to the above structure. A protective cover is provided on the outside of the No. 1 motor and the transmission mechanism. The protective cover is fixedly connected to the rotating table by buckles and bolts.

[0007] To better realize this utility model, further optimizations are made to the above structure. The transmission mechanism includes a pulley set, a speed-changing gear set, and a winding reel. A first motor drives the pulley set, the pulley set drives the speed-changing gear set, the speed-changing gear set drives the winding reel to rotate, and the pull rope is set on the winding reel.

[0008] To better realize this utility model, the above structure is further optimized. A vertical shaft is provided at the bottom of the rotating table. The vertical shaft and the base are rotatably connected by a bearing. A bevel gear is provided at the bottom of the vertical shaft. The second motor drives the bevel gear and the vertical shaft to rotate through the second bevel gear.

[0009] To better realize this utility model, the above structure is further optimized, and the frame of the base is made of acrylic sheet or ABS plastic sheet.

[0010] To better realize this utility model, the above structure is further optimized by using an anti-detachment buckle connection between the pull rope and the electromagnet.

[0011] To better realize this utility model, the above structure is further optimized by adopting a detachable solenoid structure for the electromagnet.

[0012] Compared with the prior art, this utility model has the following advantages: The electromagnetic crane teaching aid provided by this utility model optimizes existing technology, significantly reducing production costs and technical barriers, truly enabling teachers and students to make their own equipment and meeting the needs of practical teaching. It integrates multi-dimensional demonstration functions such as electrical energy to magnetic energy conversion, electrical energy to mechanical energy conversion, and the mechanical principles of fixed pulleys, improving teaching effectiveness and students' practical abilities. The mechanical parts adopt a fully enclosed protective cover design, which greatly improves the safety and ease of maintenance compared to existing teaching aids. It is compact in size, easy to store and transport, and can be quickly deployed and used in both school teaching and extracurricular activities, effectively solving the problems of high cost and difficulty in popularization of traditional teaching aids. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram of the electromagnetic crane teaching aid of this utility model; Figure 2 This is the circuit control diagram of this utility model.

[0015] In the picture: 1-Base, 101-Rotating table, 2-Motor No. 1, 3-Transmission mechanism, 4-Pull rope, 5-Support rod, 6-Pulley, 7-Electromagnet, 8-Protective cover, 9-Control line, 10-Relay, 11-Motor No. 2, 12-Bevel gear set, 13-Bearing. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figure 1 and Figure 2 As shown, the electromagnetic crane teaching aid provided by this utility model includes a base 1, a No. 1 motor 2, a transmission mechanism 3, a pull rope 4, a support rod 5, a pulley 6, and an electromagnet 7, etc.

[0020] The base 1 has a rotating platform 101 on top, which is a rotatable support platform. The first motor 2 is fixedly mounted on the rotating platform. The support rod 5 is inclined on the rotating platform, and the top of the support rod 5 needs to extend to the outside of the base 1 to avoid interference. The pulley 6 is mounted on the top of the support rod 5. The first motor 2 is connected to one end of the pull rope 4 through the transmission mechanism 3 to control its raising and lowering. The other end of the pull rope 4 passes through the pulley 6 and is connected to the electromagnet 7, thereby driving the electromagnet 7 to achieve the lifting and lowering movement, thus simulating the movement of a crane.

[0021] In this embodiment, the transmission mechanism 3 adopts a composite transmission structure of pulley set and gear set. The pulley set serves as overload protection, preventing damage to the motor due to excessive load or gear jamming. The gear set provides greater torque to ensure that heavy objects can be lifted. The transmission structure 3 includes a pulley set, a gear set, and a winding reel. Motor 2 drives the pulley set, which in turn indirectly drives the gear set. The gear set ultimately drives the coaxial winding reel to rotate. The pull rope 4 is mounted on the winding reel, and the forward and reverse rotation of the winding reel enables the rope 4 to be wound up and down.

[0022] The electromagnet 7 employs a detachable solenoid structure. By replacing the solenoid with different numbers of turns and adjusting the current knob, the relationship between current intensity, coil turns, and magnetic strength can be visually demonstrated. The base 1's frame is made of acrylic or ABS plastic sheet, readily available materials enabling low-cost self-manufacturing. The pull rope 4 and electromagnet 7 are connected by an anti-detachment buckle to prevent heavy objects from falling and ensure operational safety.

[0023] The No. 1 motor 2 and the transmission mechanism 3 are equipped with protective covers 8 on their outer sides. The protective covers 8 are fixedly connected to the rotating table 101 by buckles and bolts. The fully enclosed protective cover design effectively prevents fingers from getting caught. At the same time, it uses a 3V-6V safe DC power supply and has a built-in overcurrent protection chip to automatically cut off abnormal current. The circuit and mechanical structure adopt a modular layout, which makes fault diagnosis and maintenance convenient. Compared with existing teaching aids, it greatly improves the safety and convenience of use and maintenance, and is suitable for long-term use in classroom teaching.

[0024] Furthermore, the base 1 is equipped with a second motor 11 and a three-way relay 10. The second motor 11 drives the rotating platform 101 to rotate. The first motor 2, the second motor 11, and the electromagnet 7 are connected and controlled by the three-way relay 10 to control the forward and reverse rotation of the first motor 2 and the second motor 11 and the engagement of the electromagnet 7. Specifically, the first motor 2 controls the extension and retraction of the pull rope 4, thereby controlling the raising and lowering of the electromagnet 7; the second motor 11 controls the forward and reverse rotation of the rotating platform 101 in the horizontal direction; and the electromagnet 7 controls the grasping and releasing of objects.

[0025] In this embodiment, in order to achieve the rotation of the rotating platform 101, a vertical shaft is provided at the bottom of the rotating platform 101. The vertical shaft is rotatably connected to the base 1 through a bearing 13. The second motor 11 and the vertical shaft are driven by a bevel gear set 12. Specifically, a bevel gear one is vertically provided at the bottom of the vertical shaft. The second motor 11 drives the bevel gear one and the vertical shaft to rotate through the horizontal bevel gear two, thereby realizing the forward and reverse rotation of the rotating platform 101 in the horizontal direction.

[0026] Existing teaching aids can only demonstrate basic electromagnetic phenomena and simple mechanics experiments, offering limited functionality and primarily relying on one-way teacher demonstrations with low student participation. This application integrates multi-dimensional demonstration functions, including the conversion of electrical energy to magnetic energy, the conversion of electrical energy to mechanical energy, and the mechanics principles of fixed pulleys. It also includes components such as detachable solenoids, adjustable gear sets, and sliding fixed pulleys. Students can independently explore the impact of changes in physical parameters on experimental results by changing the number of solenoid turns, adjusting the gear ratio, and altering the position of the fixed pulley.

[0027] Existing teaching aids rely on customized components, resulting in high procurement and maintenance costs, hindering large-scale deployment. This invention uses universal materials, reducing the production cost of a single teaching aid by over 60%. Its modular design allows for individual component replacement, significantly reducing maintenance costs. Furthermore, the teaching aid weighs less than 500g, is compact, and easy to store and transport, enabling rapid deployment in both school teaching and extracurricular activities, effectively solving the problems of high cost and limited widespread adoption of traditional teaching aids.

[0028] During operation: (1) Place the self-made electromagnetic crane teaching aid on a stable platform and check whether the device is intact.

[0029] (2) Lifting the iron piece: Place the iron piece in a suitable position (directly below the electromagnet 7), extend the rope 4 downwards, and attach the electromagnet 7 to the iron piece; start the electromagnet 7, and the iron piece will be attracted by the electromagnet 7; start the rope 4 to rise, and lift the iron piece to a certain height.

[0030] (3) Placing the iron piece: Control the rotation of the rotating table 101, rotate the electromagnet 7 that lifts the iron piece to a suitable position, and stop the rotation of the rotating table 101 until it is stable; lower the electromagnet 7 with the iron piece to the table until it is stable; turn off the power of the electromagnet 7 and put down the iron piece; then raise the electromagnet 7.

[0031] (4) Return to original position: Control the rotating table 101 to return the crane to its original position.

[0032] This teaching aid allows us to observe: (1) Electromagnetic conversion phenomenon: Solenoids do not have magnetism, but they become magnetic after being energized, and can attract nearby iron parts.

[0033] (2) Observe the conversion of electrical energy into mechanical energy: When the electromagnet 7 holding the iron part is located on the table, after starting motor 2, the steel wire can be shortened and the electromagnet 7 holding the iron part can be lifted. Then the electrical energy is converted into the gravitational potential energy of the electromagnet 7 and the iron part.

[0034] (3) There is a fixed pulley at the top of the boom, which converts the vertical upward pulling force into a downward pulling force along the boom direction to lift the heavy object.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An electromagnetic crane teaching aid, characterized in that: The device includes a base, a primary motor, a transmission mechanism, a pull rope, a support rod, a pulley, and an electromagnet. The base has a rotating platform on top, the primary motor is fixedly mounted on the rotating platform, the support rod is inclinedly mounted on the rotating platform, and the pulley is mounted on top of the support rod. The primary motor is connected to one end of the pull rope through the transmission mechanism to control its opening and closing. The other end of the pull rope passes through the pulley and is connected to the electromagnet. The base is equipped with a second motor and three relays. The second motor drives the rotating platform to rotate, and the first motor, the second motor, and the electromagnet are connected and controlled by the three relays.

2. The electromagnetic crane teaching aid according to claim 1, characterized in that: The No. 1 motor and the transmission mechanism are provided with protective covers on their outer sides, and the protective covers are fixedly connected to the rotating table surface by buckles and bolts.

3. The electromagnetic crane teaching aid according to claim 2, characterized in that: The transmission mechanism includes a pulley assembly, a gear set, and a winding reel. The first motor drives the pulley assembly, which in turn drives the gear set, which in turn drives the winding reel to rotate. The pull rope is mounted on the winding reel.

4. The electromagnetic crane teaching aid according to claim 1, characterized in that: A vertical shaft is provided at the bottom of the rotating platform. The vertical shaft is rotatably connected to the base through a bearing. A bevel gear is provided at the bottom of the vertical shaft. The second motor drives the bevel gear and the vertical shaft to rotate through the second bevel gear.

5. The electromagnetic crane teaching aid according to claim 1, characterized in that: The base frame is made of acrylic sheet or ABS plastic sheet.

6. The electromagnetic crane teaching aid according to claim 1, characterized in that: The pull rope and the electromagnet are connected by an anti-detachment buckle.

7. The electromagnetic crane teaching aid according to claim 1, characterized in that: The electromagnet employs a detachable solenoid structure.

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