Pulling and rotating type centrifugal force experiment device

Abstract

The utility model discloses a pulling and rotating type centrifugal force experimental device, which belongs to the technical field of scientific experiments and comprises a base. The rotating cylinder is rotationally connected with the base through a bearing, a third rotating shaft and an output gear on the third rotating shaft are arranged at the top end of the rotating cylinder, and a frustum cover is arranged at the bottom end of the rotating cylinder; the hollow ball is placed in the rotary cylinder; the box body is arranged on the base and is provided with a cavity and an arc-shaped hole and a wire hole in the cavity; the pulling and rotating mechanism is composed of a driven part, a driving part, a flat spiral spring and a pull rope, and the driving part is provided with a first rotating shaft and an input gear on the first rotating shaft; the driven part is provided with a second rotating shaft and a large gear and a small gear on the second rotating shaft, the large gear is meshed with the output gear, the small gear is meshed with the input gear, and the second rotating shaft is connected to the arc-shaped hole; the flat spiral spring is respectively connected with the driving part and the box body; and one end of the pull rope penetrates into the cavity from the wire hole and then is partially wound on the first rotating shaft. According to the experimental device, the rotating cylinder can be rotated by repeatedly pulling the pull rope, so that the hollow ball does centrifugal force motion from bottom to top under the accelerated rotation effect of the rotating cylinder, and after the pull rope is stopped, the hollow ball does centrifugal force motion from top to bottom under the decelerated rotation effect of the rotating cylinder; therefore, students can observe the centrifugal force movement of the hollow ball during playing, and the interestingness of the students in scientific experiments can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to scientific experiment technical field, concretely relates to a pull spin formula centrifugal force experiment device. BACKGROUND

[0002] Centrifugal force is a virtual force or inertia force, which makes the rotating object away from its rotation center. At present, the science and technology museum usually uses centrifugal force experiment instrument to demonstrate and explain the generation and principle of centrifugal force. However, the existing centrifugal force experiment instrument mainly focuses on the demonstration teaching effect, and does not have good interactivity. Therefore, in order to facilitate the students to better demonstrate the centrifugal force in physics science, it is intended to interactively demonstrate the generation and principle of centrifugal force in a way of combining teaching with entertainment, so that the demonstration effect of centrifugal force is improved, and the learning of students becomes interesting and happy. UTILITY MODEL CONTENT

[0003] Therefore, the utility model provides a pull spin formula centrifugal force experiment device, which aims to interactively demonstrate the generation and principle of centrifugal force in a way of combining teaching with entertainment.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a pull spin formula centrifugal force experiment device, which includes base, rotary cylinder, transparent tubular, rotary connection through bearing with base, and the top end of rotary cylinder has third rotating shaft and output gear connected on third rotating shaft, the bottom end of rotary cylinder has detachable connection conical cover, and third rotating shaft is fixed on rotary cylinder, hollow ball is placed in rotary cylinder, box body is arranged on base, has chamber, arc hole and line hole connected with chamber, pull spin mechanism is at least partially located in chamber, is composed of driven part, driving part, plane scroll spring and pull rope, driving part has first rotating shaft and input gear connected on first rotating shaft, and first rotating shaft is rotatably arranged in chamber, driven part has second rotating shaft, large gear and small gear connected on second rotating shaft and arranged along the axial direction of second rotating shaft in sequence, large gear is engaged with output gear, small gear is engaged with input gear, and second rotating shaft is connected to arc hole, plane scroll spring is connected with driving part and box body respectively, and one end of pull rope is partially wound on first rotating shaft after passing through line hole into chamber.

[0006] With the above scheme, the experimental device can accelerate the driving element and the rotating cylinder by repeatedly pulling the pull rope, without causing the rotating cylinder to rotate in the opposite direction. Moreover, the rotating cylinder is rotated multiple times by repeatedly pulling the pull rope, so that the hollow ball moves upward under the action of centrifugal force when the rotating cylinder accelerates, and moves downward under the action of centrifugal force when the rotating cylinder decelerates after the pull rope is stopped, so that students can observe the centrifugal motion of the hollow ball while playing, which helps to improve the interest of students in scientific experiments.

[0007] Optionally, the pull rope is connected with a pull ring at the other end outside the box. The design of the pull ring greatly facilitates the students to pull the rotation of the driving element, making the experimental operation more simple and convenient, especially suitable for primary and secondary school students. At the same time, the design of the pull ring can effectively reduce the risk of hand slipping or accidental falling of the pull rope during pulling, improving the effectiveness and safety of the experiment.

[0008] Optionally, a through hole is formed in the radial direction of the input gear, and the end of the pull rope away from the pull ring is knotted in the through hole before being wound on the first rotating shaft. The design of the through hole ensures that the pull rope can only pass through the through hole and cannot be completely detached, thereby ensuring that the pull rope remains connected during the experiment, avoiding experimental failure caused by accidental detachment. By knotting the end of the pull rope to form a knot body, the fixation of the pull rope can be ensured to be more firm, avoiding the pull rope from slipping out of the through hole during pulling.

[0009] Optionally, the pull rope is a nylon rope or a flexible steel wire rope. Both of these materials have high strength and durability, can withstand multiple pulls without breaking, maintain good transmission effect, and ensure long-term use of the experimental device.

[0010] Optionally, the driving element further includes an inertia wheel connected to the first rotating shaft. The inertia wheel has a large mass, which increases the rotational inertia of the system, so that it can store more kinetic energy when the pull rope is pulled. This means that after pulling the pull rope, the inertia wheel can rotate for a longer period of time, thereby prolonging the duration of the experiment. The inertia wheel with large mass can reduce the fluctuation during rotation, making the rotation of the rotating cylinder more stable, which helps students to observe the effect of centrifugal force. Moreover, the inertia wheel and the input gear are arranged in a spaced manner, and the space between them is used for winding the pull rope, which ensures the compactness of the experimental device, and also facilitates the operation and improves the convenience of use. The planar spiral spring is placed on the opposite side of the inertia wheel and the input gear, which helps to ensure that the torque of the spring can effectively act on the driving element without being affected by the inertia wheel, thereby improving the driving efficiency.

[0011] Optionally, another arcuate hole or arcuate groove that is consistent with the arcuate hole is provided on a corresponding surface of the box body opposite the arcuate hole. In this way, a symmetrical upper and lower arcuate hole structure is provided on the box body for mounting the follower, which can effectively balance the mechanical properties of the follower and help improve the stability of the experimental device.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This experimental device increases the rotational speed of the spinner by repeatedly pulling the pull cord. This causes the hollow ball inside the spinner to gradually break away from the bottom of the cone under centrifugal force and then move along the inner slope of the cone toward the top wall of the spinner. When the pull cord stops, the centrifugal force exerted by the slow rotation of the spinner gradually decreases, and the ball falls along the top wall of the spinner and the inner slope of the cone to the bottom of the cone. This allows students to observe the centrifugal motion of the hollow ball while playing, which helps to increase the students' interest in scientific experiments. This improves learning outcomes by stimulating students' interest and active participation, not only increasing their learning motivation but also helping them better understand and remember what they have learned.

[0014] In conclusion, this pull-and-spin centrifugal force experimental device combines physical principles with interactive experience through innovative design. It has good educational significance and application value and can better serve the purpose of education and popularization of science.

[0015] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a schematic diagram of the overall structure of the pull-rotation centrifugal force experimental device of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the pull-rotate mechanism;

[0019] Figure 3 for Figure 2 Side view of;

[0020] Figure 4 for Figure 2 Schematic diagram of the follower structure in FIG;

[0021] Reference signs: base 1; rotary cylinder 2, conical cover 21; hollow ball 3; bearing 4; output gear 5, third rotating shaft 51; box 6, arc-shaped slot 61, wire hole 62; driven part 7, large gear 71, small gear 72, second rotating shaft 73; driving part 8, input gear 81, inertia wheel 82, third rotating shaft 83, through hole 84; flat spiral spring 9; pull rope 10; pull ring 11. DETAILED DESCRIPTION

[0022] The utility model will be further explained in connection with specific implementation. Among them, the drawing is only used for example explanation, and the representation is only a schematic diagram, and cannot be understood as the limitation of the patent; in order to better explain the embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and the size of actual product is not represented; for those skilled in the art, it is understandable that some well-known structures and their description in the drawing can be omitted.

[0023] As Figures 1-4As shown, the utility model discloses a pull spinning formula centrifugal force experimental device, including pedestal 1, for the whole experimental device provides stable support, the pedestal 1 is rotatably connected with spinning cylinder 2 through bearing 4, the spinning cylinder 2 is transparent tubulose, is used for placing hollow ball 3, is convenient for observing the motion track of internal hollow ball 3, and the top end of spinning cylinder 2 has the fixed connection of third shaft 51 and the output gear 5 of fixed connection on third shaft 51, and the bottom end of spinning cylinder 2 has the detachable connection of conical cover 21, such as detachable connection structure adopts the thread connection, or the plug connection or the clamping of tight fit relation, through the detachable connection, the built-in spinning cylinder 2 is placed or the hollow ball 3 of different quality is replaced, is helpful to carry out a variety of experiments, and the influence of different quality on centrifugal force is observed, the pedestal 1 is provided with box 6, and the box 6 has hollow chamber and the arc hole 61 and line hole 62 of intercommunication chamber, and the pull spinning mechanism for driving spinning cylinder 2 and output gear 5 rotation is installed in the chamber of the box 6, at least part of the components in the pull spinning mechanism are located in the chamber, and are composed of driven part 7, driving part 8, plane scroll spring 9 and pull rope 10, the driving part 8 has first shaft 83 and input gear 81 connected on first shaft 83, and the first shaft 83 is rotatably arranged in the chamber, the driven part 7 has second shaft 73 and big gear 71 and pinion 72 connected on second shaft 73 and sequentially arranged along its axial direction, the big gear 71 is stretched out outside the box 6 and is engaged with the output gear 5, the pinion 72 is engaged with the input gear 81, and the big gear 71 and the pinion 72 are integral, the big gear 71 drives the output gear 5 on spinning cylinder 2 to rotate, and the rotation of spinning cylinder 2 is accelerated, the plane scroll spring 9 is connected with the driving part 8 and the box 6 respectively, one end of pull rope 10 is inserted into the chamber from the line hole 62 and is partially wound on the first shaft 83, the plane scroll spring 9 is the structure that pulls out pull rope 10 and is reset, can drive driving part 8 to rotate in clockwise direction when pulling pull rope 10, the plane scroll spring 9 generates torque, and pull rope 10 is pulled out and lengthened, when pull rope 10 is pulled to the longest and does not pull out pull rope 10 and release pull rope 10, the plane scroll spring 9 releases torque and drives driving part 8 to rotate in counterclockwise direction and winds pull rope 10, so that pull rope 10 is shortened, so that pull rope 10 can be repeatedly pulled to accelerate driving part 8. And second shaft 73 is connected to arc hole 61, and arc hole 61 has front end and rear end, that is, in the state that pull rope 10 drives driven part 7 to rotate in clockwise direction, second shaft 73 is located at the front end of arc hole 61, and big gear 71 is engaged with output gear 5, and in the state that driven part 7 rotates in counterclockwise direction (driven by plane scroll spring 9), input gear 81 pushes pinion 72, so that second shaft 73 moves to the rear end of arc hole 61, so that big gear 71 and output gear 5 are separated, and output gear 5 and spinning cylinder 2 will not appear reverse rotation.The design of the experimental device realizes driving the rotating cylinder to accelerate rotation by pulling the pull rope, ensures that the rotating cylinder does not cause reverse rotation during operation, and has a certain deceleration rotation within a certain time after the pull rope is stopped, and has a pull rope reset function. The experimental device can be used in physics class to help students intuitively understand the concept of centrifugal force and achieve the effect of interactive demonstration of hands-on interaction. It can also be part of a science exhibition to attract visitors and demonstrate physical principles. During the self-experiment class, students can adjust the mass of the hollow ball, the rotation speed, etc. according to their own ideas, and conduct independent exploration.

[0024] In this embodiment, the pull rope 10 is connected with a pull ring 11 at the other end outside the box 6, and the pull ring 11 facilitates the students to pull the rotation of the driving part 8; and the pull rope 10 is a nylon rope or a flexible steel wire rope, so that it is not easy to break after being pulled many times, and the service life of the experimental device is enhanced.

[0025] In another embodiment, a through hole 84 is formed in the radial direction of the input gear 81, and the end of the pull rope 10 away from the pull ring is knotted in the through hole 84 before being wound on the first rotating shaft 83. In this way, one end of the pull rope 10 needs to be fixed on the driving part 8, and the through hole 84 is formed in the input gear 81 to facilitate the pull rope 10 to pass through and be fixed. The end of the pull rope 10 away from the pull ring 11 forms a knot body, which is limited to one side of the through hole 84; that is, the diameter of the through hole 84 is only large enough to pass through the pull rope 10, and after the end of the pull rope 10 passes through the through hole 84 and is knotted at the end, a knot body is formed, and the size of the knot body is larger than the diameter of the through hole 84.

[0026] In another embodiment, the driving part 8 further includes an inertia wheel 82 connected to the first rotating shaft 83, and the inertia wheel 82 is arranged in a spaced manner with the input gear 81, and the space between the two is used for winding the pull rope 10. By pulling the pull rope 10, the first rotating shaft 83 and the input gear 81 and the inertia wheel 82 thereon can be driven to rotate synchronously, and the mass of the inertia wheel 82 is much larger than that of the input gear 81. Therefore, when the pull rope 10 pulls the driving part 8 to rotate, the inertia wheel 82 has large rotational inertia, so that the driving part 8 can maintain long-time rotation and accumulate more energy, which can drive the driving part 8 to rotate continuously for a certain period of time. The planar spiral spring 9 is arranged on the opposite side of the inertia wheel 82 and the input gear 81.

[0027] In another embodiment, the corresponding surface in the box 6 opposite to the arc-shaped hole 61 is provided with another arc-shaped hole or arc-shaped groove consistent with the arc-shaped hole 61. The symmetrically designed arc-shaped hole can be used as a more stable movement path for the driven part 7 (such as the second rotating shaft 73), allowing it to have a larger range of motion during rotation, which helps the large gear 71 of the driven part 7 to mesh with and separate from the output gear 5 of the rotating cylinder 2.

[0028] When the students pull the pull rope 10 by holding the pull ring 11 with their hands, the pull rope 10 wound on the first rotating shaft 83 is pulled out, and the first rotating shaft 83 rotates clockwise, and the input gear 81 and the inertia wheel 82 rotate clockwise synchronously, the input gear 81 drives the small gear 72 and the large gear 71 of the driven part 7 to rotate, the second rotating shaft 73 is located at the front end of the arc-shaped hole 61, and the large gear 71 is engaged with the output gear 5 of the rotating cylinder 2, so that the large gear 71 drives the output gear 5 on the rotating cylinder 2 to rotate, thereby accelerating the rotation of the rotating cylinder 2. When the wound pull rope 10 is pulled out completely, the first rotating shaft 83 drives the driving part 8 to rotate counterclockwise under the action of the planar spiral spring 9, and the input gear 81 pushes the small gear 72 and drives the driven part 7 to rotate counterclockwise, thereby driving the second rotating shaft 83 to move to the rear end of the arc-shaped hole 61, when the second rotating shaft 83 of the driven part 7 is located at the rear end of the arc-shaped hole 61, the large gear 71 and the output gear 5 are separated, and no reverse force is applied to the rotating cylinder 2. In this way, the experimental device can accelerate the driving part and the rotating cylinder by repeatedly pulling the pull rope, and the rotating cylinder will not rotate in the reverse direction, and repeatedly pulling the pull rope can increase the rotating speed of the rotating cylinder, so that the hollow ball in the rotating cylinder rotates faster, and gradually separates from the bottom surface of the conical cover under the action of the centrifugal force, and moves along the inner inclined surface of the conical cover to the upper wall of the rotating cylinder. After stopping pulling the pull rope, the centrifugal force provided by the rotating cylinder gradually decreases after gradually decelerating, and the hollow ball will fall along the upper wall of the rotating cylinder and the inner inclined surface of the conical cover to the bottom surface of the conical cover, so as to observe the movement of the hollow ball under the centrifugal force. Since the students pull the pull rope, the hollow ball moves along the centrifugal force in the process of accelerating or decelerating rotation of the rotating cylinder, which helps to improve the interest of students in scientific experiments.

[0029] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A centrifugal force test device comprising a base (1), characterized in that: Also includes: The rotor (2) is in a transparent tubular shape and is rotatably connected to the base (1) via a bearing (4). The top end of the rotor (2) is provided with a third rotating shaft (51) and an output gear (5) connected to the third rotating shaft (51). The bottom end of the rotor (2) is provided with a detachably connected frustum cover (21). The third rotating shaft (51) is fixed to the rotor (2). A hollow ball (3) is placed in the rotating cylinder (2); A box (6) is provided on the base (1), and has a chamber and an arc-shaped hole (61) and a line hole (62) communicating with the chamber; The pull-rotation mechanism is at least partially located in the chamber and is composed of a driven member (7), an active member (8), a planar spiral spring (9) and a pull rope (10), wherein the active member (8) has a first rotating shaft (83) and an input gear (81) connected to the first rotating shaft (83), and the first rotating shaft (83) is rotatably arranged in the chamber; the driven member (7) has a second rotating shaft (73) and a large gear connected to the second rotating shaft (73) and arranged in sequence along its axial direction. The large gear (71) and the small gear (72) are engaged with the output gear (5), and the small gear (72) is engaged with the input gear (81). The second rotating shaft (73) is connected to the arc hole (61); the planar spiral spring (9) is respectively connected to the active member (8) and the box (6); one end of the pull rope (10) passes through the wire hole (62) into the chamber and is partially wound on the first rotating shaft (83).

2. The pull-spin centrifugal force test device according to claim 1, characterized in that: The other end of the pull rope (10) remaining outside the box (6) is connected to a pull ring (11).

3. The pull-spin centrifugal force test device according to claim 2, characterized in that: A through hole (84) is provided in the radial direction of the input gear (81), and the pull rope (10) is knotted in the through hole (84) at one end facing away from the pull ring before being wound around the first rotating shaft (83).

4. The pull-spin centrifugal force testing device according to any one of claims 1 to 3, characterized in that: The pull rope (10) is a nylon rope or a flexible steel wire rope.

5. The pull-spin centrifugal force test device according to claim 1, characterized in that: The active member (8) further includes an inertia wheel (82), the inertia wheel (82) being connected to the first rotating shaft (83), and the inertia wheel (82) and the input gear (81) being arranged at intervals, with the interval space between the two being used for winding the pull rope (10); the planar volute spring (9) being arranged on opposite sides relative to the inertia wheel (82) and the input gear (81).

6. The pull-spin centrifugal force test device according to claim 1, characterized in that: Another arc-shaped hole or arc-shaped groove consistent with the arc-shaped hole (61) is provided on a corresponding surface in the box body (6) and opposite to the arc-shaped hole (61).

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