Visual demonstration teaching aid for squirrel-cage rotor of motor

Abstract

The utility model discloses a teaching aid for intuitively demonstrating a squirrel-cage rotor of a motor, which relates to the technical field of teaching aids and comprises a counterweight base, support frames are fixedly mounted at two ends of the upper surface of the counterweight base, a squirrel-cage rotor is arranged between the two support frames, and the squirrel-cage rotor is connected with the support frames in an up-down sliding manner through a connecting device. The squirrel cage rotor is rotatably connected with the connecting device, the squirrel cage rotor comprises two connecting plates, a plurality of copper bar groups are arranged between the two connecting plates, one of the copper bar groups is fixedly connected with the two connecting plates, and the other copper bar groups are inserted between the two connecting plates in a sliding manner. The motor squirrel-cage rotor visual demonstration teaching aid has the advantages that the number of the copper bar groups can be flexibly adjusted, the number of the copper bar groups can be conveniently changed, and the effect of a contrast experiment can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching aid technical field especially relates to motor squirrel cage rotor direct demonstration teaching aid. BACKGROUND

[0002] The patent document with publication number CN215911086U and the name of internal rotor type induction motor demonstration instrument discloses that it includes bottom plate, support frame, connecting device, squirrel cage rotor, motor base (with stator winding), voltage regulator and other supporting devices. Based on the teacher demonstration experiment process, students can intuitively and deeply understand professional technical knowledge. Through the power-on test of the complete set of devices, students can quickly master the working principle of the motor. Especially by changing the number of rotor copper bars, by changing the input voltage, by local broken bar, the effect of the speed change of the squirrel cage rotor with the change of the rotating magnetic field induction intensity can be observed. Compared with the prior art standard, the experimental device is more intuitive and measurable, and the squirrel cage rotor changes speed with the change of the rotating magnetic field induction intensity, which greatly facilitates the teaching of electromagnetic induction principle for middle school and vocational college students.

[0003] Although the above disclosure can provide teaching demonstration observation experiments, the number of bars on the squirrel cage rotor is fixed, and the number of bars cannot be conveniently adjusted and changed during demonstration experiments, thereby affecting the test speed and effect. UTILITY MODEL CONTENT

[0004] The utility model discloses motor squirrel cage rotor direct demonstration teaching aid, aim at solving the squirrel cage rotor on the cage bar number is fixed, when demonstrating, cannot convenient adjustment change the number of bars, thereby solve the rotor cage bar number change to the test of the influence of speed.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The motor squirrel cage rotor direct demonstration teaching aid, including counterweight base, squirrel cage rotor and connecting device, both ends of the upper surface of the counterweight base are fixedly installed with support frame, the squirrel cage rotor is arranged between two support frames, the squirrel cage rotor is slidably connected with the support frame through the connecting device, the squirrel cage rotor is rotatably connected with the connecting device, the squirrel cage rotor includes two connecting plates, a plurality of copper bar groups are arranged between the two connecting plates, one copper bar group is fixedly connected with the two connecting plates, and the remaining copper bar groups are slidably inserted between the two connecting plates.

[0007] Through the setting up support frame, the squirrel cage rotor is slidably connected with the support frame through the connecting device, so that the height of the squirrel cage rotor can be adjusted according to the actual situation of the number of experimental viewers, so that the students in the back row can also clearly observe the experimental process.

[0008] The copper strip groups are multiple groups on the copper strip rotor, and except that one group of copper strip groups is fixedly connected with the connecting plate, the remaining copper strip groups are slidably inserted between the connecting plates, so that when the experiment is carried out, the remaining copper strip groups can be conveniently selectively installed and removed, the number of copper strip groups can be flexibly adjusted, and the number of copper strip groups can be conveniently changed for comparison experiments.

[0009] In a preferred scheme, the number of copper strip groups is three groups, the three groups of copper strip groups are distributed in a circular ring shape, the connecting plate is a circular plate, and the three groups of copper strip groups are coaxial with the connecting plate.

[0010] By setting the number of copper strip groups to three groups, the three groups of copper strip groups are distributed in a circular ring shape, the connecting plate is a circular plate, and the three groups of copper strip groups are coaxial with the connecting plate, so that the copper strip groups and the connecting plate are located on the same center, and when the connecting plate rotates, the copper strip groups can be stably driven to change position.

[0011] In a preferred scheme, one group of the copper strip groups includes a plurality of first copper strips, another group of the copper strip groups includes a ring-shaped plate, the side surface of the ring-shaped plate is fixedly connected with a second copper strip, and the end of the second copper strip penetrates through the connecting plate and is slidably connected therewith.

[0012] By setting the first copper strips and the distance between adjacent first copper strips being the same, the first copper strips are uniformly distributed on the connecting plate, the distance between adjacent two second copper strips is the same, and each second copper strip is arranged between two first copper strips, the distance between the second copper strip and the adjacent two first copper strips is the same, so that after the first copper strips and the second copper strips are installed, they are uniformly distributed on the connecting plate, the first copper strips, the second copper strips, and the center position on the connecting plate have the same distance, and the side surface of the connecting plate is provided with a ring-shaped groove matched with the ring-shaped plate.

[0013] In a preferred scheme, the remaining one group of the copper strip groups includes a plurality of third copper strips, the third copper strip includes a copper strip rod, both ends of the copper strip rod are provided with a baffle, one of the baffles is fixedly connected with the copper strip rod, the side surface of the other baffle is fixedly connected with a boss, and the end of the boss extends into the copper strip rod and is threadedly connected therewith.

[0014] By setting the copper strip rod and the baffles at both ends of the copper strip rod, the position of the copper strip rod can be fixed under the cooperation of the baffles after the copper strip rod is inserted, the distance between adjacent two copper strip rods is the same, and the distance between the copper strip rod and the center on the connecting plate is less than the distance between the second copper strip and the center on the connecting plate.

[0015] In one preferred scheme, the support frame is a screw rod, the connecting device is a sliding sleeve in sliding connection with the screw rod, nuts are threadedly connected to the circumferential side of the screw rod and located on the upper and lower surfaces of the sliding sleeve, shaft rods are fixedly connected to the side surfaces of the center of the connecting plate, T-shaped ring blocks are fixedly connected to the end portions of the shaft rods, and a T-shaped ring groove is formed in the circumferential side of the sliding sleeve and matched with the T-shaped ring blocks.

[0016] By arranging the screw rod, the height of the adjusting nut is adjusted, so that the sliding sleeve is driven to be adjusted in height correspondingly, and the T-shaped ring blocks and the T-shaped ring groove are arranged, so that the squirrel cage rotor can be stably rotated.

[0017] As can be seen from the above, the motor squirrel cage rotor intuitive demonstration teaching aid has the following technical effects.

[0018] Firstly, the squirrel cage rotor is in sliding connection with the support frame through the connecting device, so that the height of the squirrel cage rotor can be adjusted according to the actual situation of the number of experimental viewers, so that the students in the back row can also clearly observe the experimental process.

[0019] Secondly, the copper bar groups on the squirrel cage rotor are multiple groups, and the copper bar groups are in sliding insertion between the connecting plates except that one group of the copper bar groups is fixedly connected to the connecting plate, so that the remaining copper bar groups can be selectively mounted and dismounted conveniently during the experiment, the number of the copper bar groups can be flexibly adjusted, and the number of the copper bar groups can be conveniently changed for comparison experiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall structural schematic view of the motor squirrel cage rotor intuitive demonstration teaching aid.

[0021] Figure 2 It is an explosion schematic view of the support frame and the squirrel cage rotor connecting structure of the motor squirrel cage rotor intuitive demonstration teaching aid.

[0022] Figure 3 It is an explosion schematic view of the squirrel cage rotor and the connecting device connecting structure of the motor squirrel cage rotor intuitive demonstration teaching aid.

[0023] Figure 4 It is an explosion schematic view of the squirrel cage rotor connecting structure of the motor squirrel cage rotor intuitive demonstration teaching aid.

[0024] Figure 5 It is an explosion schematic view of the copper bar rod connecting structure of the motor squirrel cage rotor intuitive demonstration teaching aid.

[0025] In the drawings: 1, counterweight base; 2, support frame; 21, screw rod; 3, squirrel cage rotor; 31, shaft; 311, T-shaped ring block; 32, connecting plate; 321, annular groove; 33, copper strip group; 331, first copper strip; 35, annular plate; 351, second copper strip; 36, third copper strip; 361, copper strip rod; 362, baffle; 363, boss; 4, connecting device; 41, sliding sleeve; 411, T-shaped ring groove; 42, nut. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0027] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] Referring to Figures 1-5 The motor squirrel cage rotor direct demonstration teaching aid comprises a counterweight base 1, support frames 2 are fixedly installed on the upper surface of the counterweight base 1 at both ends, a squirrel cage rotor 3 is arranged between the two support frames 2, the squirrel cage rotor 3 is slidably connected with the support frames 2 through a connecting device 4, the squirrel cage rotor 3 is rotationally connected with the connecting device 4, the squirrel cage rotor 3 comprises two connecting plates 32, a plurality of copper strip groups 33 are arranged between the two connecting plates 32, one of the copper strip groups 33 is fixedly connected with the two connecting plates 32, and the remaining copper strip groups 33 are slidably inserted between the two connecting plates 32.

[0029] In the embodiment, the support frames 2 are arranged, the squirrel cage rotor 3 is slidably connected with the support frames 2 through the connecting device 4, the height of the squirrel cage rotor 3 can be adjusted according to the actual situation of the number of people watching the experiment, so that the students in the back row can also clearly observe the experiment process.

[0030] The copper strip groups 33 on the squirrel cage rotor 3 are in multiple groups, one of the copper strip groups 33 is fixedly connected with the connecting plates 32, and the remaining copper strip groups 33 are slidably inserted between the connecting plates 32, so that the remaining copper strip groups 33 can be selectively installed and removed during the experiment, the number of the copper strip groups 33 can be flexibly adjusted, and the number of the copper strip groups 33 can be conveniently changed for comparison experiments.

[0031] Referring toFigure 1 and Figure 4 In a preferred embodiment, the number of copper strip groups 33 is three, the three copper strip groups 33 are distributed in a circular ring shape, the connecting plate 32 is a circular plate, and the three copper strip groups 33 are coaxial with the connecting plate 32.

[0032] In the embodiment, by setting the number of copper strip groups 33 to three, the three copper strip groups 33 are distributed in a circular ring shape, the connecting plate 32 is a circular plate, and the three copper strip groups 33 are coaxial with the connecting plate 32, so that the copper strip groups 33 and the connecting plate 32 are located on the same center, and when the connecting plate 32 rotates, the copper strip groups 33 can be stably driven to change position.

[0033] Referring to Figure 1 and Figure 4 In a preferred embodiment, one of the copper strip groups 33 includes a plurality of first copper strips 331, another of the copper strip groups 33 includes a ring-shaped plate 35, the side surface of the ring-shaped plate 35 is fixedly connected with a second copper strip 351, the end of the second copper strip 351 penetrates through the connecting plate 32 and is slidably connected therewith, and the one and the other of the copper strip groups 33 have the same radius of the circular ring shape.

[0034] In the embodiment, by setting the first copper strips 331 and the distance between adjacent first copper strips 331 being the same, the first copper strips 331 are uniformly distributed on the connecting plate 32, the distance between adjacent two second copper strips 351 is the same, each second copper strip 351 is arranged between two first copper strips 331, the distance between the second copper strip 351 and the adjacent two first copper strips 331 is the same, so that after the first copper strips 331 and the second copper strips 351 are installed, they are uniformly distributed on the connecting plate 32, the first copper strips 331, the second copper strips 351 and the center position on the connecting plate 32 have the same distance, and the side surface of the connecting plate 32 is provided with a ring-shaped groove 321 matched with the ring-shaped plate 35.

[0035] Referring to Figure 1 and Figure 5 In a preferred embodiment, the remaining one of the copper strip groups 33 includes a plurality of third copper strips 36, the third copper strip 36 includes a copper strip rod 361, both ends of the copper strip rod 361 are provided with baffles 362, one of the baffles 362 is fixedly connected with the copper strip rod 361, the side surface of the other baffle 362 is fixedly connected with a boss 363, and the end of the boss 363 extends into the copper strip rod 361 and is threadedly connected therewith.

[0036] In the embodiment, the copper strip rod 361 is provided with the baffle 362 at both ends, so that the position of the copper strip rod 361 can be fixed after the copper strip rod 361 is inserted, the distance between the two adjacent copper strip rods 361 is the same, and the distance between the copper strip rod 361 and the center of the connecting plate 32 is less than the distance between the second copper strip 351 and the center of the connecting plate 32.

[0037] With reference to Figure 2 And Figure 3 In a preferred embodiment, the support frame 2 is a screw rod 21, the connecting device 4 is a sliding sleeve 41 in sliding connection with the screw rod 21, the screw rod 21 is threadedly connected with the nut 42 on the upper and lower surfaces of the sliding sleeve 41, the side surface of the center of the connecting plate 32 is fixedly connected with the shaft rod 31, the end of the shaft rod 31 is fixedly connected with the T-shaped ring block 311, and the circumferential surface of the sliding sleeve 41 is provided with the T-shaped ring groove 411 matched with the T-shaped ring block 311.

[0038] In the embodiment, the screw rod 21 is provided, the height of the adjusting nut 42 is adjusted, the sliding sleeve 41 is driven to be adjusted in height accordingly, and the T-shaped ring block 311 and the T-shaped ring groove 411 are provided, so that the squirrel cage rotor 3 can be stably rotated.

[0039] Working principle: when the height of the squirrel cage rotor 3 needs to be adjusted, the nut 42 is rotated, the height of the adjusting nut 42 on the screw rod 21 is adjusted, the sliding sleeve 41 is driven to be adjusted in height accordingly, and when the height of the sliding sleeve 41 is changed, the squirrel cage rotor 3 is driven to be changed in height accordingly.

[0040] When the comparative experiment needs to be performed, the second copper strip 351 and the copper strip rod 361 are selectively inserted in sequence, so that the comparative experiment can be conveniently performed.

[0041] The above describes only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. The substitution can be the substitution of part of the structure, device, method step, or the complete technical scheme. According to the technical scheme and the utility model concept of the utility model, equivalent substitution or change are covered in the protection scope of the utility model.

Claims

1. A teaching aid for direct demonstration of the squirrel cage rotor of an electric motor, characterized in that, The application relates to a weight base (1), a support frame (2), a squirrel cage rotor (3) and a connecting device (4); the upper surface of the weight base (1) is fixedly provided with the support frames (2) at both ends; the squirrel cage rotor (3) is arranged between the two support frames (2); the squirrel cage rotor (3) is slidably connected with the support frames (2) through the connecting device (4); the squirrel cage rotor (3) is rotationally connected with the connecting device (4); the squirrel cage rotor (3) comprises two connecting plates (32), a plurality of copper strip groups (33) are arranged between the two connecting plates (32); one of the copper strip groups (33) is fixedly connected with the two connecting plates (32), and the rest of the copper strip groups (33) are slidably inserted between the two connecting plates (32); the number of the copper strip groups (33) is three, the three copper strip groups (33) are distributed in a circular ring shape, and the connecting plates (32) are circular plates; one of the copper strip groups (33) comprises a plurality of first copper strips (331), another of the copper strip groups (33) comprises a ring-shaped plate (35), the side surface of the ring-shaped plate (35) is fixedly connected with a second copper strip (351), and the end portion of the second copper strip (351) penetrates through the connecting plate (32) and is slidably connected with the connecting plate (32).

2. The direct-view demonstration teaching aid for motor squirrel cage rotor according to claim 1, characterized in that, The three copper strip groups (33) are coaxial with the connecting plate (32).

3. The direct-view demonstration teaching aid for motor squirrel cage rotor according to claim 2, characterized in that, The rest of the copper strip groups (33) comprises a plurality of third copper strips (36), the third copper strip (36) comprises a copper strip rod (361), the two ends of the copper strip rod (361) are provided with baffle plates (362), one of the baffle plates (362) is fixedly connected with the copper strip rod (361), the side surface of the other baffle plate (362) is fixedly connected with a boss (363), and the end portion of the boss (363) extends into the copper strip rod (361) and is threadedly connected with the copper strip rod (361).

4. The direct-view demonstration teaching aid for motor squirrel cage rotor according to claim 3, characterized in that, The support frame (2) is a screw rod (21), the connecting device (4) is a sliding sleeve (41) slidably connected with the screw rod (21), the side surface of the screw rod (21) and located on the upper and lower surfaces of the sliding sleeve (41) is threadedly connected with a nut (42), the side surface of the center of the connecting plate (32) is fixedly connected with a shaft rod (31), the end portion of the shaft rod (31) is fixedly connected with a T-shaped ring block (311), and the side surface of the sliding sleeve (41) is provided with a T-shaped ring groove (411) matched with the T-shaped ring block (311).

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