CN113436509B - Probability calculation demonstration equipment for mathematical education - Google Patents

Abstract

The invention relates to the technical field of teaching equipment, in particular to a demonstration device for probability calculation for mathematical education, which comprises a base, wherein supporting plates are fixedly arranged on two sides of the top of the base, top plates are fixedly arranged on the tops of two groups of supporting plates, a mixing mechanism is arranged between the two groups of supporting plates, a feeding mechanism is arranged at the bottom of the mixing mechanism, a guide mechanism matched with the feeding mechanism is arranged in the base, the mixing mechanism comprises a motor, a spline shaft, a tank body, a fixed rod, a cam groove and a through hole, wherein the motor is fixedly arranged on one side of one group of supporting plates, the motor drives the tank body to rotate through the spline shaft to drive the demonstration ball to turn up and down, the tank body slides in the rotating process due to the matching of the fixed rod and the cam groove, and the tank body slides to enable the demonstration ball to roll left and right when turning up and down, therefore, the demonstration ball has larger moving amplitude, can be fully stirred, and is more uniform in mixing.

Description

Probability calculation demonstration equipment for mathematics education

Technical Field

The invention relates to the technical field of teaching equipment, in particular to demonstration equipment for probability calculation for mathematical education.

Background

The arithmetic of ancient China is one of six crafts (called 'number' in the six crafts), the mathematics originates from early production activities of human beings, and ancient Barbieluns have accumulated certain mathematical knowledge and can apply practical problems from the ancient times.

In modern times, mathematics is a subject of studying concepts such as quantity, structure, variation, space, and information, and belongs to a form science from a certain point of view. Mathematics, through the use of abstraction and logical reasoning, results from counting, computing, measuring, and observing the shape and motion of objects. Mathematics has become part of the educational category in many countries and regions. It is used in different fields including science, engineering, medicine, economics and finance. Mathematicians also study pure mathematics, which is the material of mathematics itself, and do not target any practical application.

The phenomena observed in nature and society are classified into: determining phenomena and random phenomena. On one hand, the probability has unique concepts and methods, and on the other hand, the probability is closely related to other mathematical branches and is an important component of modern mathematics; the signal interference resistance, resolution and the like can be improved in communication engineering by various departments of industrial and agricultural production and national economy.

The calculation probability statistics is a cross, marginal and useful subject branch among subjects such as probability theory, mathematical statistics, computational science, computer science and the like, researches how to carry out statistical analysis processing on trial observation data or random simulation data according to requirements brought out by practical problems by using probability statistics models provided in the probability theory and the mathematical statistics, and provides numerical results of statistical description, statistical control or statistical prediction of the properties of the practical problems.

Present demonstration equipment for probability calculation for mathematics education rotates towards a direction mostly, makes the demonstration ball in the equipment can not be opened by abundant stirring, and the demonstration ball can not by intensive mixing, and present demonstration equipment can not be better leads to the demonstration ball, and the demonstration ball easily blocks in the equipment, and in the multiunit passageway of entering that can not be even, at equipment operation in-process, difficult interpolation demonstration ball.

Disclosure of Invention

Aiming at the problems, the invention provides the demonstration equipment for probability calculation for mathematical education, the demonstration ball has larger moving range, can be fully stirred, is more uniform in mixing, can better guide the demonstration ball, is not easy to be clamped in the equipment, can uniformly enter a plurality of material distribution channels, can be added in the demonstration process, and is convenient to use.

In order to achieve the above object, the present invention adopts the following technical solutions:

the demonstration equipment for probability calculation for mathematics education comprises a base, wherein supporting plates are fixedly arranged on two sides of the top of the base, top plates are fixedly arranged on the tops of two groups of supporting plates, a mixing mechanism is arranged between the two groups of supporting plates, a material passing mechanism is arranged at the bottom of the mixing mechanism, and a guide mechanism matched with the material passing mechanism is arranged in the base;

the mixing mechanism comprises a motor, a spline shaft, a tank body, a fixed rod, a cam groove and a through opening;

wherein one side fixed mounting of a set of backup pad has the motor, and the output of motor is connected with the integral key shaft, and the outside of integral key shaft has cup jointed a jar body, and a jar body is located between two sets of backup pads, and the external side of jar is opened there is the cam groove, and the bottom of the jar body is opened there is the cam groove, and the bottom of roof is fixed be provided with cam groove matched with dead lever.

Preferably, the material passing mechanism comprises a guide frame, a guide pipe and a material passing pipe;

the fixed leading truck that is provided with jar body matched with in top of base, and the bottom of leading truck is provided with the stand pipe, and the bottom intercommunication of stand pipe has the material pipe that leads to, and the stand pipe is down trapezoidally.

Preferably, the guide mechanism comprises a material distributing groove, a poking plate and a wing plate;

the base is provided with a material distribution groove communicated with the material passing pipe, the top of the material distribution groove is rotatably connected with a poking plate, wing plates are arranged on two sides of the bottom of the poking plate, and the distance between each wing plate and the inner wall of the material distribution groove is shorter than the distance between each poking plate and the inner wall of the material distribution groove.

Preferably, the guide mechanism comprises a corner plate, a half face gear, a helical gear, a connecting rod, a synchronous wheel and a synchronous belt;

the top of dividing the silo rotates and is connected with the scute, and the axle of scute extends the base and is connected with half face gear, and the one end of base is located the both sides of half face gear and rotates and be connected with two sets of helical gears, and the fixed connecting rod that is provided with between two sets of helical gears, and one side of integral key shaft and one of them set of helical gear all fixed synchronization wheel that is provided with, and the hold-in range has been cup jointed in the outside of two sets of synchronization wheels.

Preferably, the stirring device also comprises a stirring mechanism, wherein the stirring mechanism is arranged in the tank body and comprises an inner gear ring, an eccentric shaft, a long gear ring and stirring blades;

an inner gear ring is arranged on one side of the tank body, which is far away from the motor, an eccentric shaft is rotationally connected with one group of supporting plates and extends into the tank body, a long gear ring meshed with the inner gear ring is fixedly arranged on the outer side of the eccentric shaft, and a plurality of groups of stirring blades are fixedly arranged on the outer side of the eccentric shaft, which is positioned in the tank body.

Preferably, the inside of roof still is fixed and is provided with the hopper, and the hopper is opened has the round hole with opening matched with.

Preferably, one side of the two groups of supporting plates opposite to each other is fixedly provided with a fixed cylinder, a spring is arranged in the fixed cylinder, one side of the two groups of fixed cylinders opposite to each other is connected with a sliding cylinder in a sliding mode, one side of the two groups of sliding cylinders far away from each other is abutted against the spring, and the tank body is provided with a guide groove matched with the sliding cylinder.

Preferably, the outer side of the tank body is arc-shaped, the bottom of the base is provided with a material frame matched with the material distribution groove, and the bottom of the material distribution groove is provided with a plurality of groups of material distribution channels.

A demonstration apparatus for probability calculation for mathematics education, comprising the steps of:

step 1: the demonstration balls with different colors are placed in the tank body, the motor drives the tank body to rotate through the spline shaft to drive the demonstration balls to turn up and down, and the fixed rod is matched with the cam groove to enable the tank body to slide back and forth in the rotating process so that the demonstration balls roll left and right when turning up and down;

and 2, step: when the through opening of the tank body rotates to correspond to the guide pipe, the demonstration balls fall into the guide pipe through the through opening, the balls in the guide pipe enter the material distribution groove through the material passing pipe, the demonstration balls are guided by the poking plate, and the demonstration balls abut against the wing plate to enable the poking plate to rotate and the demonstration balls to be sequentially discharged through the material distribution groove when the demonstration balls fall to be in contact with the wing plate due to the fact that the space between the wing plate and the material distribution groove becomes narrow;

and step 3: if a demonstration ball is added, the demonstration ball is placed into the hopper, the tank body periodically slides and resets after rotating for a circle, when the through port rotates to the top, the through port is matched with the hopper due to the sliding of the tank body, and the demonstration ball in the hopper falls into the tank body;

and 4, step 4: and the conclusion is obtained by counting the number of the demonstration balls in the material counting frame.

A demonstration device for probability calculation for mathematics education, comprising the following operation steps:

step 1: the demonstration balls with different colors are placed in the tank body, the motor drives the tank body to rotate through the spline shaft to drive the demonstration balls to turn up and down, and the fixed rod is matched with the cam groove to enable the tank body to slide back and forth in the rotating process so that the demonstration balls roll left and right when turning up and down;

step 2: when the through opening of the tank body rotates to correspond to the guide pipe, the demonstration ball falls into the guide pipe through the through opening, the ball in the guide pipe enters the material distributing groove through the material passing pipe, and the angle plate guides the demonstration ball;

and step 3: when the motor drives the tank body, the synchronous wheels are matched with the synchronous belts to drive the two groups of bevel gears to rotate, and the two groups of bevel gears are matched to enable the half-face gears to drive the angle plates to rotate in a reciprocating mode, so that the demonstration balls are guided into different material distribution channels;

and 4, step 4: if a demonstration ball is added, the demonstration ball is placed into the hopper, the tank body periodically slides and resets after rotating for a circle, when the through port rotates to the top, the through port is matched with the hopper due to the sliding of the tank body, and the demonstration ball in the hopper falls into the tank body;

and 5: and the conclusion is obtained by counting the number of the demonstration balls in the material counting frame.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the demonstration ball is placed in the tank body, the motor drives the tank body to rotate through the spline shaft, the demonstration ball is driven to turn up and down, the tank body slides in the rotating process due to the matching of the fixed rod and the cam groove, and the demonstration ball rolls left and right when turning up and down due to the sliding of the tank body, so that the demonstration ball has a larger moving amplitude, can be fully stirred, and is more uniformly mixed;

2. according to the demonstration ball feeding device, the guide frame matched with the tank body is arranged on the base, when the through hole of the tank body rotates to correspond to the guide pipe, the demonstration ball falls into the guide pipe through the through hole, the ball in the guide pipe enters the material distribution groove through the material passing pipe, the stirring plate guides the demonstration ball, the wing plate and the material distribution groove are narrowed, when the demonstration ball falls to be in contact with the wing plate, the stirring plate is abutted against the wing plate to rotate to discharge the demonstration ball through the material distribution groove, the stirring plate is repeatedly pushed and guided in the falling process of the demonstration ball, so that the demonstration ball can be well guided, the demonstration ball is not easily clamped in the device, and the demonstration ball can uniformly enter a plurality of material distribution channels;

3. according to the demonstration ball feeder, the long gear ring is meshed with the inner gear ring, when the tank body rotates, the inner gear ring drives the eccentric shaft to rotate through the long gear ring, so that the demonstration balls are further stirred by the stirring blades, the stirring efficiency of the demonstration balls is improved, when the tank body rotates, if the demonstration balls are added, the demonstration balls are placed into the hopper, the tank body periodically slides and reset after rotating for one circle, when the through opening rotates to the top, the through opening is matched with the hopper due to the sliding of the tank body, the demonstration balls in the hopper fall into the tank body, and therefore the demonstration balls can be added in the demonstration process, and the demonstration ball feeder is convenient to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only for the present invention and protect some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the improved structure of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a front view of a can body of the present invention;

FIG. 5 is a side cross-sectional view of the present invention.

In the figure: 1. a base; 101. a support plate; 102. a top plate; 2. a motor; 3. a spline shaft; 4. a tank body; 5. fixing the rod; 6. a cam slot; 7. a port; 8. a guide frame; 9. a guide tube; 10. a material passing pipe; 11. a material distributing groove; 12. a poking plate; 13. a wing plate; 14. an inner gear ring; 15. an eccentric shaft; 16. a long gear ring; 17. stirring blades; 18. a gusset; 19. a half face gear; 20. a helical gear; 21. a connecting rod; 22. a synchronizing wheel; 23. a synchronous belt; 24. and (4) a hopper.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

Example 1

The demonstration equipment for probability calculation for mathematics education comprises a base 1, wherein supporting plates 101 are fixedly arranged on two sides of the top of the base 1, top plates 102 are fixedly arranged on the tops of two groups of supporting plates 101, a mixing mechanism is arranged between the two groups of supporting plates 101, a feeding mechanism is arranged at the bottom of the mixing mechanism, and a guide mechanism matched with the feeding mechanism is arranged in the base 1;

the mixing mechanism comprises a motor 2, a spline shaft 3, a tank body 4, a fixed rod 5, a cam groove 6 and a through opening 7;

wherein one side fixed mounting of a set of backup pad 101 has motor 2, and motor 2's output is connected with integral key shaft 3, and the outside of integral key shaft 3 has cup jointed a jar body 4, and jar body 4 is located between two sets of backup pads 101, and jar body 4 outside is opened there is cam groove 6, and the bottom of jar body 4 is opened there is cam groove 6, and the fixed dead lever 5 that is provided with cam groove 6 matched with in the bottom of roof 102.

The material passing mechanism comprises a guide frame 8, a guide pipe 9 and a material passing pipe 10;

the fixed leading truck 8 that is provided with jar body 4 matched with in base 1's top, and the bottom of leading truck 8 is provided with stand pipe 9, and the bottom intercommunication of stand pipe 9 has logical material pipe 10, and stand pipe 9 is down trapezoidally.

The guide mechanism comprises a material distributing groove 11, a poking plate 12 and wing plates 13;

the base 1 is provided with a material distribution groove 11 communicated with the material passing pipe 10, the top of the material distribution groove 11 is rotatably connected with a poking plate 12, two sides of the bottom of the poking plate 12 are provided with wing plates 13, and the distance between each wing plate 13 and the inner wall of the material distribution groove 11 is shorter than the distance between each poking plate 12 and the inner wall of the material distribution groove 11.

The top plate 102 is also fixedly provided with a hopper 24 inside, and the hopper 24 is provided with a round hole matched with the through hole 7.

The opposite side of the two groups of supporting plates 101 is fixedly provided with a fixed cylinder, a spring is arranged in the fixed cylinder, the opposite side of the two groups of fixed cylinders is connected with a sliding cylinder in a sliding manner, the side, far away from the two groups of sliding cylinders, is abutted against the spring, and the tank body 4 is provided with a guide groove matched with the sliding cylinder.

The outside of jar body 4 is the arc, and the bottom of base 1 is provided with and divides silo 11 matched with material frame, and the bottom of dividing silo 11 is provided with multiunit branch material passageway.

The using method of the invention comprises the following steps:

step 1: demonstration balls with different colors are placed in a tank body 4, a motor 2 drives the tank body 4 to rotate through a spline shaft 3 to drive the demonstration balls to turn up and down, and a fixed rod 5 is matched with a cam groove 6 to enable the tank body 4 to slide back and forth in the rotating process so that the demonstration balls roll left and right when turning up and down;

step 2: when the through opening 7 of the tank body 4 rotates to correspond to the guide pipe 9, the demonstration balls fall into the guide pipe 9 through the through opening 7, the balls in the guide pipe 9 enter the material distribution groove 11 through the material passing pipe 10, the demonstration balls are guided by the poking plate 12, and due to the fact that the space between the wing plate 13 and the material distribution groove 11 becomes narrow, when the demonstration balls fall to be in contact with the wing plate 13, the demonstration balls abut against the wing plate 13, and the poking plate 12 rotates to enable the demonstration balls to be sequentially discharged through the material distribution groove 11;

and step 3: if a demonstration ball is added, the demonstration ball is placed into the hopper 24, the tank body 4 periodically slides and resets after rotating for one circle, when the through port 7 rotates to the top, the through port 7 is matched with the hopper 24 due to the sliding of the tank body 4, and the demonstration ball in the hopper 24 falls into the tank body 4;

and 4, step 4: and the conclusion is obtained by counting the number of the demonstration balls in the material counting frame.

The demonstration ball is placed into the tank body 4 to slide, so that the demonstration ball rolls left and right when turned up and down, the demonstration ball has large moving amplitude and can be fully stirred, the mixture is more uniform, the demonstration ball can be well guided by matching the guide frame 8 with the poking plate 12, the demonstration ball is not easy to be clamped in equipment, the demonstration ball can uniformly enter a plurality of material distribution channels, the demonstration ball can be conveniently added in the demonstration process, and the tank body 4 can better and stably rotate by matching the sliding cylinder with the guide groove.

The demonstration balls of different colors are mixed, so that the randomness of demonstration is guaranteed, the accuracy of probability demonstration experiments can be improved, and the probability random phenomenon is reflected by the multiple probabilities of the distribution of the demonstration balls of different colors under the condition that the quantity of the demonstration balls in the material frame is the same through the uniform distribution of the poking plate 12.

Example 2

On the basis of the example 1, the method comprises the following steps of,

the stirring device is arranged in the tank body 4 and comprises an inner gear ring 14, an eccentric shaft 15, a long gear ring 16 and stirring blades 17;

an inner gear ring 14 is arranged on one side of the tank body 4 far away from the motor 2, an eccentric shaft 15 is rotatably connected to one group of supporting plates 101, the eccentric shaft 15 extends into the tank body 4, a long gear ring 16 meshed with the inner gear ring 14 is fixedly arranged on the outer side of the eccentric shaft 15, and a plurality of groups of stirring blades 17 are fixedly arranged on the outer side of the eccentric shaft 15 in the tank body 4.

The use method of the invention also comprises the following steps: through the meshing of long gear ring 16 and inner gear ring 14, when jar body 4 rotates, inner gear ring 14 drives eccentric shaft 15 through long gear ring 16 and rotates to make stirring leaf 17 further stir the demonstration ball, improve the efficiency that the demonstration ball stirred and scatters, make the equipment more high-efficient when using.

Example 3

The structure of the present embodiment is substantially the same as embodiment 1, except that:

the guide mechanism can be replaced by intermittent guide and comprises an angle plate 18, a half face gear 19, a helical gear 20, a connecting rod 21, a synchronous wheel 22 and a synchronous belt 23;

divide the top of silo 11 to rotate and be connected with scute 18, and the axle of scute 18 extends base 1 and is connected with half face gear 19, and the one end of base 1 is located the both sides rotation of half face gear 19 and is connected with two sets of helical gears 20, and the fixed connecting rod 21 that is provided with between two sets of helical gears 20, and one side of integral key shaft 3 and one of them set of helical gear 20 all fixed synchronizing wheel 22 that is provided with, and the hold-in range 23 has been cup jointed in the outside of two sets of synchronizing wheel 22.

The use method of the invention can also be as follows:

step 1: the demonstration balls with different colors are placed in the tank body 4, the motor 2 drives the tank body 4 to rotate through the spline shaft 3 to drive the demonstration balls to turn up and down, and the fixed rod 5 is matched with the cam groove 6 to enable the tank body 4 to slide back and forth in the rotating process so that the demonstration balls roll left and right when turning up and down;

step 2: when the through opening 7 of the tank body 4 rotates to correspond to the guide pipe 9, the demonstration balls fall into the guide pipe 9 through the through opening 7, the balls in the guide pipe 9 enter the material distributing groove 11 through the material passing pipe 10, and the demonstration balls are guided by the angle plate 18;

and step 3: when the motor 2 drives the tank body 4, the synchronous wheel 22 and the synchronous belt 23 are matched to drive the two groups of bevel gears 20 to rotate, and the matching of the two groups of bevel gears 20 enables the half-face gear 19 to drive the angle plate 18 to rotate in a reciprocating manner, so that the demonstration balls are guided into different material distribution channels;

and 4, step 4: if a demonstration ball is added, the demonstration ball is placed into the hopper 24, the tank body 4 periodically slides and resets after rotating for one circle, when the through opening 7 rotates to the top, the through opening 7 is matched with the hopper 24 due to the sliding of the tank body 4, and the demonstration ball in the hopper 24 falls into the tank body 4;

and 5: and obtaining a conclusion by counting the number of the demonstration balls in the material counting frame.

This embodiment drives the regular reciprocating rotation of scute 18 through motor 2 for scute 18 can be stable leads to the demonstration ball, and because motor 2 drives scute 18 and jar body 4 rotation simultaneously, makes scute 18 can with the better cooperation of jar body 4.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (7)

1. A demonstration device for probability calculation for mathematics education, comprising a base (1), characterized in that: supporting plates (101) are fixedly arranged on two sides of the top of the base (1), top plates (102) are fixedly arranged on the tops of two groups of supporting plates (101), a mixing mechanism is arranged between the two groups of supporting plates (101), a material passing mechanism is arranged at the bottom of the mixing mechanism, and a guide mechanism matched with the material passing mechanism is arranged in the base (1);

the mixing mechanism comprises a motor (2), a spline shaft (3), a tank body (4), a fixing rod (5), a cam groove (6) and a through hole (7);

one side of one group of the supporting plates (101) is fixedly provided with a motor (2), the output end of the motor (2) is connected with a spline shaft (3), the outer side of the spline shaft (3) is sleeved with a tank body (4), the tank body (4) is positioned between the two groups of the supporting plates (101), the outer side of the tank body (4) is provided with a cam groove (6), the bottom of the tank body (4) is provided with a cam groove (6), and the bottom of the top plate (102) is fixedly provided with a fixing rod (5) matched with the cam groove (6);

the material passing mechanism comprises a guide frame (8), a guide pipe (9) and a material passing pipe (10);

the top of the base (1) is fixedly provided with a guide frame (8) matched with the tank body (4), the bottom of the guide frame (8) is provided with a guide pipe (9), the bottom of the guide pipe (9) is communicated with a material passing pipe (10), and the guide pipe (9) is in an inverted trapezoid shape;

the guide mechanism comprises a material distributing groove (11), a poking plate (12) and a wing plate (13);

the base (1) is provided with a material distribution groove (11) communicated with the material passing pipe (10), the top of the material distribution groove (11) is rotatably connected with a poking plate (12), wing plates (13) are arranged on two sides of the bottom of the poking plate (12), and the distance between each wing plate (13) and the inner wall of the material distribution groove (11) is shorter than that between each poking plate (12) and the inner wall of the material distribution groove (11);

the guide mechanism comprises an angle plate (18), a half face gear (19), a helical gear (20), a connecting rod (21), a synchronous wheel (22) and a synchronous belt (23);

divide the top of silo (11) to rotate and be connected with scute (18), and the axle of scute (18) extends base (1) and is connected with half face gear (19), the one end of base (1) is located the both sides rotation of half face gear (19) and is connected with two sets of helical gears (20), and fixes between two sets of helical gears (20) and be provided with connecting rod (21), one side of integral key shaft (3) and one of them set of helical gear (20) all fixed synchronizing wheel (22) that is provided with, and synchronous belt (23) have been cup jointed in the outside of two sets of synchronizing wheel (22).

2. The presentation apparatus for probability calculation for mathematics education as claimed in claim 1, wherein: the stirring device is characterized by also comprising a stirring mechanism, wherein the stirring mechanism is arranged inside the tank body (4) and comprises an inner gear ring (14), an eccentric shaft (15), a long gear ring (16) and stirring blades (17);

an inner gear ring (14) is arranged on one side, away from the motor (2), of the tank body (4), one group of supporting plates (101) is in rotating connection with an eccentric shaft (15), the eccentric shaft (15) extends into the tank body (4), a long gear ring (16) meshed with the inner gear ring (14) is fixedly arranged on the outer side of the eccentric shaft (15), and a plurality of groups of stirring blades (17) are fixedly arranged on the outer side of the eccentric shaft (15) and positioned in the tank body (4).

3. The presentation apparatus for probability calculation for mathematics education as claimed in claim 2, wherein: the inside of the top plate (102) is also fixedly provided with a hopper (24), and the hopper (24) is provided with a round hole matched with the through hole (7).

4. The presentation apparatus for probability calculation for mathematics education as claimed in claim 2, wherein: two sets of one side that backup pad (101) are relative is fixed to be provided with fixed cylinder, and is provided with the spring in the fixed cylinder, and two sets of one side that fixed cylinder is relative slides even has a slide cartridge, and one side that two sets of slide cartridges kept away from mutually offsets with the spring, jar body (4) are opened has the guide way with slide cartridge matched with.

5. The presentation apparatus for probability calculation for mathematics education as claimed in claim 2, wherein: the outside of the tank body (4) is arc-shaped, the bottom of the base (1) is provided with a material frame matched with the material distribution groove (11), and the bottom of the material distribution groove (11) is provided with a plurality of groups of material distribution channels.

6. The demonstration apparatus for probability calculation for mathematics according to claim 1, characterized in that: the operation steps are as follows:

step 1: demonstration balls with different colors are placed in a tank body (4), a motor (2) drives the tank body (4) to rotate through a spline shaft (3) to drive the demonstration balls to turn up and down, and a fixed rod (5) is matched with a cam groove (6) to enable the tank body (4) to slide back and forth in the rotating process, so that the demonstration balls roll left and right when turning up and down;

and 2, step: when the through hole (7) of the tank body (4) rotates to correspond to the guide pipe (9), the demonstration balls fall into the guide pipe (9) through the through hole (7), the balls in the guide pipe (9) enter the distributing groove (11) through the material passing pipe (10), the stirring plate (12) guides the demonstration balls, and the demonstration balls are sequentially discharged through the distributing groove (11) due to the fact that the distance between the wing plate (13) and the distributing groove (11) is narrowed, when the demonstration balls fall to be in contact with the wing plate (13), the demonstration balls abut against the wing plate (13) and the stirring plate (12) rotates;

and step 3: if a demonstration ball is added, the demonstration ball is placed into the hopper (24), the tank body (4) periodically slides and resets after rotating for one circle, when the through port (7) rotates to the top, the through port (7) is matched with the hopper (24) due to the sliding of the tank body (4), and the demonstration ball in the hopper (24) falls into the tank body (4);

and 4, step 4: and the conclusion is obtained by counting the number of the demonstration balls in the material counting frame.

7. The presentation apparatus for probability calculation for mathematics education as claimed in claim 1, wherein: the operation steps are as follows:

step 1: demonstration balls with different colors are placed in a tank body (4), a motor (2) drives the tank body (4) to rotate through a spline shaft (3) to drive the demonstration balls to turn up and down, and a fixed rod (5) is matched with a cam groove (6) to enable the tank body (4) to slide in a reciprocating mode in the rotating process, so that the demonstration balls roll left and right when turning up and down;

step 2: when the through hole (7) of the tank body (4) rotates to correspond to the guide pipe (9), the demonstration ball falls into the guide pipe (9) through the through hole (7), the ball in the guide pipe (9) enters the material distributing groove (11) through the material passing pipe (10), and the angle plate (18) guides the demonstration ball;

and step 3: when the motor (2) drives the tank body (4), the synchronous wheels (22) and the synchronous belts (23) are matched to drive the two groups of bevel gears (20) to rotate, and the half end face gear (19) drives the angle plate (18) to rotate in a reciprocating manner by the matching of the two groups of bevel gears (20), so that the demonstration balls are guided into different material distribution channels;

and 4, step 4: if a demonstration ball is added, the demonstration ball is placed into the hopper (24), the tank body (4) periodically slides and resets after rotating for one circle, when the through port (7) rotates to the top, the through port (7) is matched with the hopper (24) due to the sliding of the tank body (4), and the demonstration ball in the hopper (24) falls into the tank body (4);

and 5: and the conclusion is obtained by counting the number of the demonstration balls in the material counting frame.

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