Mathematical probability demonstration device

Abstract

The utility model discloses a mathematical probability demonstration device, which belongs to the technical field of teaching aids and comprises a base, a connecting plate fixedly connected to one side of the top surface of the base, a supporting plate fixedly connected to one side of the connecting plate, a fixing seat fixedly connected to one side of the top of the supporting plate, a motor fixedly connected to the fixing seat, and a first gear fixedly connected to the top of one side of the supporting plate. The output end of the motor penetrates through the gear I and is fixedly connected with a fixing frame, and the gear I is meshed with a gear II. According to the utility model, the motor is started to drive the screening tank to rotate, and when the screening tank rotates, the belt pulley I, the belt body and the belt pulley II at the top are used for transmission, so that the screening tank rotates during rotation; the stirring rod effectively stirs in the screening tank while rotating, the disordering effect on the small balls is further improved, the fairness during demonstration is enhanced through automatic disordering, operation is easy, use is convenient, and practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, in particular to a mathematical probability demonstration device. Background Art

[0002] Mathematical probability demonstration device is a teaching aid used to demonstrate probability distribution and random events. This device is usually composed of some small balls, boxes or other containers, which are used to simulate random experiments to intuitively demonstrate probability distribution and random events.

[0003] The existing mathematical probability demonstration device still has the following defects when in use: the balls cannot be effectively shuffled, which affects the accuracy of the experimental results, and the fairness of manually shuffling the balls is poor, which affects the fairness of the demonstration. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a mathematical probability demonstration device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mathematical probability demonstration device, comprising a base, a connecting plate is fixedly connected to one side of the top surface of the base, a support plate is fixedly connected to one side of the connecting plate, a fixed seat is fixedly connected to one side of the top of the support plate, a motor is fixedly connected to the fixed seat, a gear one is fixedly connected to the top of one side of the support plate, the output end of the motor passes through the gear one and is fixedly connected to a fixed frame, the gear one is meshed with the gear two, the gear two is fixedly connected to a transmission shaft one, the transmission shaft one is rotatably connected to one side of the top of the fixed frame, the transmission shaft one is fixedly connected to one end away from the gear two, a belt body is installed on the pulley one, a pulley two is installed on the side of the belt body away from the pulley one, a transmission shaft two is fixedly connected to the bottom surface of the pulley two, the transmission shaft two is rotatably connected to one side of the top of the fixed frame away from the transmission shaft one, the transmission shaft two is fixedly connected to a screening tank at one end away from the pulley two, a transmission shaft three is fixedly connected to the bottom of the fixed frame, and the top of the transmission shaft three is rotatably connected to the bottom surface of the screening tank.

[0006] As a further description of the above technical solution:

[0007] One side of the bottom of the support plate is fixedly connected to the fixed plate, one side of the top of the fixed plate is fixedly connected to a ball receiving port, the ball receiving port in the fixed plate is fixedly connected to a conduction tube, the side of the conduction tube away from the ball receiving port is fixedly connected to the side of the top surface of the base away from the connecting plate, and the side of the base away from the support plate is fixedly connected to a collection box.

[0008] As a further description of the above technical solution:

[0009] A plug plate is plugged into the bottom of the screening tank, and the plug plate passes through the ball outlet in the screening tank to open and close the ball outlet, thereby effectively controlling the falling of the balls.

[0010] As a further description of the above technical solution:

[0011] The top of the screening tank is provided with a ball inlet, and a protective cover 1 is threadedly connected to the ball inlet. The bottom of the screening tank is provided with a ball outlet, and a protective cover 2 is threadedly connected to the ball outlet to prevent the balls from flying out of the screening tank when the screening tank rotates.

[0012] As a further description of the above technical solution:

[0013] The transmission shaft three is located in one side of the screening tank and is fixedly connected with a stirring rod, which effectively disrupts the small balls in the screening tank.

[0014] As a further description of the above technical solution:

[0015] The screening tank is made of plastic material, and the transparent plastic material allows for better observation of the interior of the screening tank.

[0016] As a further description of the above technical solution:

[0017] The conduction tube is arranged above the collection box, so that the balls falling in the conduction tube fall into the collection box.

[0018] The utility model has the following beneficial effects: in the utility model, the starting motor can drive the screening tank to rotate, and while the screening tank rotates, the transmission is carried out through the top pulley 1, the belt body and the pulley 2, so that the screening tank rotates while rotating, and the stirring rod effectively stirs in the screening tank while rotating, and the scrambling effect of the balls is further improved, and the automated scrambling enhances the fairness of the demonstration, the operation is simple, easy to use, and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a mathematical probability demonstration device proposed by the utility model Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of a mathematical probability demonstration device proposed by the utility model Figure 2 ;

[0021] Figure 3 A schematic diagram of the local structure of a mathematical probability demonstration device proposed by the utility model Figure 2 .

[0022] Legend:

[0023] 1. Base; 2. Connecting plate; 3. Support plate; 4. Fixed seat; 5. Motor; 6. Gear 1; 7. Gear 2; 8. Transmission shaft 1; 9. Fixed frame; 10. Pulley 1; 11. Belt body; 12. Pulley 2; 13. Transmission shaft 2; 14. Ball inlet; 15. Protective cover 1; 16. Screening tank; 17. Insert plate; 18. Ball outlet; 19. Protective cover 2; 20. Transmission shaft 3; 21. Stirring rod; 22. Ball receiving port; 23. Conducting tube; 24. Collecting box; 25. Fixed plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-Figure 3 The utility model provides an embodiment: a mathematical probability demonstration device, including a base 1, a connecting plate 2 is fixedly connected to one side of the top surface of the base 1, a supporting plate 3 is fixedly connected to one side of the connecting plate 2, a fixing seat 4 is fixedly connected to one side of the top of the supporting plate 3, a motor 5 is fixedly connected to the fixing seat 4, a gear 1 6 is fixedly connected to the top of one side of the supporting plate 3, an output end of the motor 5 passes through the gear 1 6 and is fixedly connected to a fixing frame 9, the gear 1 6 is meshed with a gear 2 7, the gear 2 7 is fixedly connected to a transmission shaft 1 8, and the transmission shaft 1 8 is rotatably connected to one side of the top of the fixing frame 9, A transmission shaft 8 is fixedly connected to one end away from the gear 2 7 with a pulley 10, a belt body 11 is installed on the pulley 10, a pulley 2 12 is installed on the side of the belt body 11 away from the pulley 10, a transmission shaft 2 13 is fixedly connected to the bottom of the pulley 2 12, the transmission shaft 2 13 is rotatably connected to the top of the fixed frame 9 away from the side of the transmission shaft 8, the transmission shaft 2 13 is fixedly connected to one end away from the pulley 2 12 with a screening tank 16, a transmission shaft 3 20 is fixedly connected to the bottom of the fixed frame 9, and the top of the transmission shaft 3 20 is rotatably connected to the bottom of the screening tank 16.

[0026] The bottom side of the support plate 3 is fixedly connected to the fixing plate 25, the top side of the fixing plate 25 is fixedly connected to the ball receiving port 22, the ball receiving port 22 in the fixing plate 25 is fixedly connected to the conduction tube 23, the side of the conduction tube 23 away from the ball receiving port 22 is fixedly connected to the top surface of the base 1 away from the connecting plate 2, the side of the base 1 away from the support plate 3 is fixedly connected to the collecting box 24, the bottom of the screening tank 16 is plugged with a plug plate 17, the plug plate 17 passes through the ball outlet 18 in the screening tank 16, the ball outlet 18 is opened and closed, and the falling of the small balls is effectively controlled. The top of the screening tank 16 is provided with a ball inlet 14, and the ball inlet A protective cover 15 is threadedly connected to the opening 14, a ball outlet 18 is provided at the bottom of the screening tank 16, and a protective cover 2 19 is threadedly connected to the ball outlet 18 to prevent the balls from flying out of the screening tank 16 when the screening tank 16 rotates. A transmission shaft 3 20 is located on one side of the screening tank 16 and is fixedly connected to a stirring rod 21 to effectively disrupt the balls in the screening tank 16. The screening tank 16 is made of plastic, and the transparent plastic material allows for better observation of the interior of the screening tank 16. The conduction tube 23 is arranged above the collecting box 24, so that the balls falling in the conduction tube 23 fall into the collecting box 24.

[0027] Working principle: When a probability demonstration is required, the protective cover 15 is unscrewed from the ball inlet 14, and different kinds of small balls are placed into the screening tank 16 through the ball inlet 14. The protective cover 15 is tightened to start the motor 5, and the motor 5 drives the fixed frame 9 to rotate. The fixed frame 9 effectively drives the screening tank 16 to rotate. When the screening tank 16 rotates, the gear 27 is engaged with the gear 16, so that the gear 27 drives the pulley 10 on the transmission shaft 8 to rotate, and the pulley 10 transmits the transmission to the pulley 2 12 through the belt body 11. The bottom of the pulley 2 12 is fixed. The fixedly connected transmission shaft 2 13 effectively drives the screening tank 16 to rotate. Since the screening tank 16 is rotationally connected to the transmission shaft 3 20, the screening tank 16 rotates, so that the stirring rod 21 effectively stirs the small balls inside the screening tank 16. After stopping the motor 5, unscrew the protective cover 2 19 on the ball outlet 18, pull open the plug plate 17 to let the small balls fall into the ball receiving port 22 through the ball outlet 18, and the small balls fall into the collecting box 24 from the ball receiving port 22 under the guidance of the conduction tube 23, insert the plug plate 17 and tighten the protective cover 2 19 to complete the demonstration of the probability of the small balls.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mathematical probability demonstration device, comprising a base (1), characterized in that: A connecting plate (2) is fixedly connected to one side of the top surface of the base (1), a supporting plate (3) is fixedly connected to one side of the connecting plate (2), a fixing seat (4) is fixedly connected to one side of the top of the supporting plate (3), a motor (5) is fixedly connected to the fixing seat (4), a gear 1 (6) is fixedly connected to the top of one side of the supporting plate (3), an output end of the motor (5) passes through the gear 1 (6) and is fixedly connected to a fixing frame (9), the gear 1 (6) is meshed with the gear 2 (7), the gear 2 (7) is fixedly connected to a transmission shaft 1 (8), the transmission shaft 1 (8) is rotatably connected to one side of the top of the fixing frame (9), and the transmission shaft 1 (8) is away from the gear 2 (7). ) is fixedly connected to one end of a pulley 1 (10), a belt body (11) is mounted on the pulley 1 (10), a pulley 2 (12) is mounted on the side of the belt body (11) away from the pulley 1 (10), a transmission shaft 2 (13) is fixedly connected to the bottom surface of the pulley 2 (12), the transmission shaft 2 (13) is rotatably connected to the top of a fixed frame (9) away from the transmission shaft 1 (8), a screening tank (16) is fixedly connected to one end of the transmission shaft 2 (13) away from the pulley 2 (12), a transmission shaft 3 (20) is fixedly connected to the bottom of the fixed frame (9), and the top of the transmission shaft 3 (20) is rotatably connected to the bottom surface of the screening tank (16).

2. A mathematical probability demonstration device according to claim 1, characterized in that: The bottom side of the support plate (3) is fixedly connected to a fixed plate (25), the top side of the fixed plate (25) is fixedly connected to a ball receiving port (22), the ball receiving port (22) in the fixed plate (25) is fixedly connected to a conduction tube (23), the side of the conduction tube (23) away from the ball receiving port (22) is fixedly connected to the top surface of the base (1) away from the connecting plate (2), and the side of the base (1) away from the support plate (3) is fixedly connected to a collection box (24).

3. A mathematical probability demonstration device according to claim 1, characterized in that: A plug plate (17) is plugged into the bottom of the screening tank (16), and the plug plate (17) passes through a ball outlet (18) in the screening tank (16).

4. A mathematical probability demonstration device according to claim 1, characterized in that: The top of the screening tank (16) is provided with a ball inlet (14), and a protective cover (15) is threadedly connected to the ball inlet (14). The bottom of the screening tank (16) is provided with a ball outlet (18), and a protective cover (19) is threadedly connected to the ball outlet (18).

5. A mathematical probability demonstration device according to claim 1, characterized in that: The transmission shaft 3 (20) is located inside the screening tank (16) and is fixedly connected to a stirring rod (21) on one side.

6. A mathematical probability demonstration device according to claim 1, characterized in that: The screening tank (16) is made of plastic.

7. A mathematical probability demonstration device according to claim 2, characterized in that: The conduction tube (23) is arranged above the collection box (24).

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