Conical pendulum demonstrator

Abstract

The utility model discloses a conical pendulum demonstrator which comprises a base, a vertical rod and a swinging ball, a first motor is arranged in the base, the driving end of the first motor is fixedly connected with the vertical rod, the swinging ball connected through a flexible connecting piece is fixed at the upper end of the vertical rod, two clamping plates are oppositely arranged on the two sides of the vertical rod, and the swinging ball and the flexible connecting piece are located in a gap between the two clamping plates. The swing ball can rotate along with the vertical rod along the fixed point to be centrifugally lifted, when the vertical rod of the conical pendulum demonstrator is driven by the first motor to rotate, the flexible connecting piece connected to the vertical rod drives the swing ball to rotate along with the vertical rod to be centrifugally lifted, and the conical pendulum demonstrator is compact in design structure, small in size and convenient to move and operate; the arrangement of the clamping plates enables the phase angle of the swing ball to be fast synchronous with the rotating speed of the vertical rod, enables the conical pendulum to move fast and to be in a stable state, prevents the phase angle of the swing ball from lagging behind the rotating speed of the rotating vertical rod for a long time after the start of rotation, and improves the use efficiency.

Description

Technical Field

[0001] This utility model relates to a teaching aid, and in particular to a conical pendulum demonstrator for measuring the motion law of a conical pendulum. Background Technology

[0002] Most existing conical pendulum demonstrators have the following problems: the teaching aids are large in size, making them inconvenient to move and operate; it is not convenient to adjust the speed and observe parameters such as the swing angle and the length of the swing rope, and it is even more inconvenient to read the parameters when the pendulum is rotating; the phase angle of the pendulum ball often lags behind the rotation speed of the axis of rotation at the beginning of the rotation, and the time for the pendulum ball to enter a stable swing state is relatively long; the teaching aids can only hold one pendulum ball, making it inconvenient to observe the swing patterns of pendulum balls with different masses and rope lengths. Utility Model Content

[0003] This invention overcomes the problems of existing conical pendulum demonstrators, such as large size, inconvenient movement and operation, difficulty in adjusting speed and observing angles, long time for the pendulum ball to enter a stable swing state, and difficulty in observing the swing patterns of pendulum balls with different masses and rope lengths. It provides a conical pendulum demonstrator that is small in size and compact in structure, convenient to move and operate via voice and button control, and features graduations on the clamping plate for easy observation of the swing rope length and swing angle. The clamping plate allows the conical pendulum to quickly enter a stable state, improving efficiency. The limiting comb teeth fix the swing rope after rotational stabilization, facilitating the reading of the swing angle after it comes to rest. Furthermore, multiple observation balls of different masses and lengths can be installed simultaneously, facilitating the observation and comparison of the swing patterns of pendulum balls with different masses and rope lengths.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a conical pendulum demonstrator, including a base, a vertical rod, and a swing ball. A first motor is installed in the base, and the drive end of the first motor is fixedly connected to the vertical rod. The upper end of the vertical rod is fixed to the swing ball, which is connected by a flexible connector. Two clamping plates are arranged opposite each other on both sides of the vertical rod. The swing ball and the flexible connector are located between the gaps of the two clamping plates. The swing ball can be centrifugally lifted along the fixed point as the vertical rod rotates. When the vertical rod of the conical pendulum demonstrator rotates under the drive of the first motor, the flexible connector connected to the vertical rod also rotates and centrifugally lifts the swing ball. This utility model has a compact design, small size, and is easy to move and operate. The clamping plates ensure that the phase angle of the swing ball quickly synchronizes with the rotation speed of the vertical rod, allowing the conical pendulum to reach a stable state quickly. This avoids the phase angle of the swing ball lagging behind the rotation speed of the vertical rod for a long time after the rotation begins, thus improving efficiency.

[0006] Furthermore, the flexible connector is a swing rope.

[0007] Furthermore, an arc-shaped groove is concentrically set on the clamping plate along the fixing point of the swing ball, and a limiting plate is inserted into the arc-shaped groove. The limiting plate is provided with evenly distributed limiting comb teeth. The swing rope of the swing ball can be locked between the comb teeth. A connecting plate is fixedly provided on the other side of the comb teeth of the limiting plate. A second motor is fixedly provided on one of the clamping plates. The drive rod of the second motor is fixedly connected to the connecting plate. The drive rod of the second motor is perpendicular to the connecting plate. By controlling the drive rod of the second motor, the connecting plate can be moved away from or closer to the swing ball. During the process from rest to the rotation of the pole, the drive rod of the second motor is controlled to make the comb teeth move away from the swing rope. The swing ball can be stabilized at a certain angle as the pole rotates. When the swing rope is stabilized at a certain angle, the second motor is controlled to make the comb teeth on the connecting plate move closer to the swing rope and lock the swing rope. When the rotation stops, the comb teeth are still locked to the swing rope. At this time, the swing angle when the rotation is stable can be clearly observed.

[0008] Furthermore, positioning holes are opened at the positions where the clamping plate and the connecting plate intersect with a certain vertical line on the surface of the clamping plate. Positioning rods are fitted into the positioning holes, and baffles are provided at both ends of the positioning rods. The positioning rods make the movement of the connecting plate more stable when the comb teeth are pulled closer or pushed further away by the second motor drive rod.

[0009] Furthermore, the clamp is a transparent clamp with a scale for measuring the length of the swing rope and the swing angle. The transparent clamp makes it easy to observe the motion parameters of the swing ball and to read the length of the swing rope and the swing angle.

[0010] Furthermore, a limiting block is provided at the top of the upright, which is clamped between the clamping plates. The limiting block is provided with a limiting groove. The swing rope of the swing ball passes through the limiting groove and can slide and change angle in the limiting groove as the upright rotates. The limiting block makes the swing ball swing within a certain range, preventing the swing ball from falling out of the clamping plates, and further makes the conical pendulum motion of the swing ball quickly stabilize.

[0011] Furthermore, the number of pendulum balls can be greater than one. Multiple pendulum balls with different masses and different rope lengths can be set up to facilitate comparative observation of the motion patterns of pendulum balls with different masses and rope lengths when performing conical pendulum motion.

[0012] Furthermore, the base is equipped with an LCD screen that displays angular velocity. The LCD screen is electrically connected to the first motor. The LCD screen displays angular velocity, has good visibility, and is convenient to read.

[0013] Furthermore, the base is equipped with a control device to control the opening and closing of the demonstrator, the adjustment of the rotational angular velocity of the upright, and the movement of the drive end of the second motor, making the conical pendulum demonstrator more convenient to use.

[0014] Furthermore, the control device can be a voice control module and / or control buttons, allowing users to control the conical pendulum demonstrator via voice control and / or buttons, which is convenient and quick.

[0015] The beneficial effects of this invention are as follows: the clamping plate design allows the conical pendulum to reach a stable state quickly, preventing the phase angle of the pendulum ball from lagging behind the rotational speed of the upright for a long time after startup, thus improving efficiency; the transparent clamping plate and scale design make reading values ​​convenient, allowing the length of the pendulum rope to be read when stationary, and locking the angle of the pendulum rope by pulling the control limit comb after the conical pendulum reaches stability, so that the angle on the transparent clamping plate can be read after the movement stops, which is accurate and convenient; the design of the first motor and the upright makes the overall size small and the structure compact, making it easy to handle and use; multiple pendulum balls with different masses and rope lengths can be set at the same time for easy comparison and observation; voice control and button control make the operation of the conical pendulum demonstrator more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of the conical pendulum demonstrator.

[0017] Figure 2 This is a schematic diagram of the overall design of the conical pendulum demonstrator.

[0018] Figure 3 This is a schematic diagram of the overall design of the conical pendulum demonstrator.

[0019] Figure 4 A schematic diagram showing the conical pendulum demonstrator without the clamping plate, connecting plate, and limiting plate.

[0020] in:

[0021] 1. Base; 2. Swing rope; 3. Upright pole; 4. Swing ball; 5. Clamping plate; 6. Arc groove; 7. Limiting plate; 8. Limiting comb teeth; 9. Connecting plate; 10. Second motor; 11. Limiting groove; 12. Positioning hole; 13. LCD screen; 14. Limiting block; 15. Positioning rod; 16. Baffle; 17. Button; 18. Second motor drive rod. Detailed Implementation

[0022] To better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0023] See appendix Figure 1-4A conical pendulum demonstrator in this embodiment includes a base 1, a vertical rod 3, and a pendulum ball 4. A first motor is provided in the base 1, and the drive end of the first motor is fixedly connected to the vertical rod 3. The upper end of the vertical rod 3 is fixed with the pendulum ball 4 connected by a flexible connector. Two clamping plates 5 are provided on opposite sides of the vertical rod 3. The pendulum ball 4 and the flexible connector are located between the gaps of the two clamping plates 5. The pendulum ball 4 can be centrifugally lifted along the fixed point of the pendulum ball 4 as the vertical rod 3 rotates.

[0024] In this embodiment, the flexible connector is the swing rope 2.

[0025] In this embodiment, an arc-shaped groove 6 is concentrically arranged on the clamping plate 5 along the fixing point of the swing ball 4. A limiting plate 7 is inserted into the arc-shaped groove 6. The limiting plate 7 is provided with uniformly distributed limiting comb teeth 8. The swing rope 2 of the swing ball 4 can be locked between the comb teeth. A connecting plate 9 is fixedly provided on the other side of the comb teeth of the limiting plate 7. A second motor 10 is fixedly provided on one of the clamping plates 5. The second motor drive rod 18 is fixedly connected to the connecting plate 9. The second motor drive rod 18 is perpendicular to the connecting plate 9.

[0026] In this embodiment, positioning holes 12 are provided at the positions where the clamping plate 5 and the connecting plate 9 intersect with a certain vertical line on the surface of the clamping plate 5. Positioning rods 15 are sleeved in the positioning holes 12, and baffles 16 are provided at both ends of the positioning rods 15.

[0027] In this embodiment, the clamping plate 5 is a transparent plate, and the clamping plate 5 is provided with a scale for measuring the length and / or swing angle of the swing rope 2.

[0028] In this embodiment, a limiting block 14 is provided at the top of the upright 3. The limiting block 14 is clamped between the clamping plates 5. A limiting groove 11 is provided on the limiting block 14. The swing rope 2 of the swing ball 4 passes through the limiting groove 11 and can slide and change the angle in the limiting groove 11 as the upright 3 rotates.

[0029] In this embodiment, the number of swing balls 4 is greater than 1.

[0030] In this embodiment, the base 1 is provided with a liquid crystal display screen 13 that displays angular velocity, and the liquid crystal display screen 13 is electrically connected to the first motor.

[0031] In this embodiment, the base 1 is equipped with a control device to control the opening and closing of the demonstrator, the adjustment of the rotational angular velocity of the pole 3, and the movement of the drive end of the second motor 10.

[0032] In this embodiment, the control device is a voice control module and / or operation buttons 17.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A conical pendulum demonstrator, comprising a base (1), a vertical rod (3), and a pendulum ball (4), characterized in that, The base (1) is provided with a first motor, the drive end of the first motor is fixedly connected to the upright (3), the upper end of the upright (3) is fixed with a swing ball (4) connected by a flexible connector, two clamps (5) are provided on opposite sides of the upright (3), the swing ball (4) and the flexible connector are located between the gaps of the two clamps (5), and the swing ball (4) can be centrifugally lifted along the fixed point of the swing ball (4) as the upright (3) rotates.

2. The conical pendulum demonstrator as described in claim 1, characterized in that, The flexible connector is a swing rope (2).

3. A conical pendulum demonstrator as described in claim 2, characterized in that, An arc-shaped groove (6) is concentrically provided on the clamping plate (5) along the fixing point of the swing ball (4). A limiting plate (7) is inserted into the arc-shaped groove (6). The limiting plate (7) is provided with uniformly distributed limiting comb teeth (8). The swing rope (2) of the swing ball (4) can be locked between the comb teeth. A connecting plate (9) is fixed on the other side of the comb teeth of the limiting plate (7). A second motor (10) is fixed on one of the clamping plates (5). The second motor drive rod (18) is fixedly connected to the connecting plate (9). The second motor drive rod (18) is perpendicular to the connecting plate (9).

4. A conical pendulum demonstrator as described in claim 3, characterized in that, The clamping plate (5) and the connecting plate (9) are both provided with positioning holes (12) at a position where they intersect a vertical line with the surface of the clamping plate (5). A positioning rod (15) is fitted in the positioning hole (12), and baffles (16) are provided at both ends of the positioning rod (15).

5. A conical pendulum demonstrator as described in claim 2, characterized in that, The clamp (5) is a transparent plate, and the clamp (5) is provided with a scale for measuring the length and / or swing angle of the swing rope (2).

6. A conical pendulum demonstrator as described in claim 2, characterized in that, The top of the pole (3) is provided with a limiting block (14), which is clamped between the clamping plates (5). The limiting block (14) is provided with a limiting groove (11). The swing rope (2) of the swing ball (4) passes through the limiting groove (11) and can slide and change angle in the limiting groove (11) as the pole (3) rotates.

7. A conical pendulum demonstrator as described in claim 1, characterized in that, The number of the swing balls (4) is greater than 1.

8. A conical pendulum demonstrator as described in claim 1, characterized in that, The base (1) is provided with a liquid crystal display screen (13) for displaying angular velocity, and the liquid crystal display screen (13) is electrically connected to the first motor.

9. A conical pendulum demonstrator as described in claim 1, characterized in that, The base (1) is equipped with a control device for controlling the opening and closing of the demonstrator, adjusting the rotational angular velocity of the pole (3), and controlling the movement of the drive end of the second motor (10).

10. A conical pendulum demonstrator as described in claim 9, characterized in that, The control device is a voice control module and / or operation buttons (17).

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