CN209657592U - A kind of mathematical probabilities demonstration teaching aid - Google Patents

Abstract

The utility model discloses a kind of mathematical probabilities demonstration teaching aids, including pedestal, the top two sides of the pedestal are fixedly installed with mounting plate and servo motor respectively, the side of the mounting plate is fixedly installed with the object keeping box of a side opening, the object keeping box is equipped with chamber, the opening of the chamber is slidably fitted with slide plate, the opening of object keeping box is completely covered in slide plate, shaft is fixedly installed on the output shaft of the servo motor, fixing sleeve is equipped with first gear and the first bevel gear in the shaft, vertical pivot is rotatably equipped at the top of the pedestal, fixing sleeve is equipped with second gear on the vertical pivot, and second gear and first gear are meshed, round tank is fixedly installed at the top of the vertical pivot.The utility model structure is simple, and it is convenient to operate, and the demonstration of probability problem is carried out by setting teaching aid ontology, keeps explanation more intuitive, the understanding of probability is carried out convenient for student, improves teacher and carries out the efficiency that probability is given lessons.

Description

A kind of mathematical probabilities demonstration teaching aid

Technical field

The utility model relates to subsidiary water reducing ratio technical field more particularly to a kind of mathematical probabilities demonstration teaching aids.

Background technique

Probability is once called as probability, also known as probability, chance rate or probability, be mathematical probabilities opinion basic conception, be one Real number between 0 to 1 is the measurement to the possibility of chance event generation, and generally speaking, probability is people according to chance event The concept of the rule definition of generation.

Teacher is respectively more telling about the probability of height certain object fall to two equirotal rotatable interfaces When few, the teaching of probability is carried out often by written citing, student, which understands, to get up relatively difficult, and the probability of teacher, which is given lessons not, to be had Standby intuitive, causes to give lessons inefficient, so we have proposed a kind of mathematical probabilities demonstration teaching aids, to solve above-mentioned mention Out the problem of.

Utility model content

Purpose of the utility model is to solve disadvantages existing in the prior art, and a kind of mathematical probabilities proposed are drilled Display teaching aid.

To achieve the goals above, the utility model adopts the technical scheme that

The top two sides of a kind of mathematical probabilities demonstration teaching aid, including pedestal, the pedestal are fixedly installed with mounting plate respectively And servo motor, the side of the mounting plate are fixedly installed with the object keeping box of a side opening, the object keeping box is equipped with chamber, institute The opening for stating chamber is slidably fitted with slide plate, and slide plate is completely covered the opening of object keeping box, on the output shaft of the servo motor It is fixedly installed with shaft, fixing sleeve is equipped with first gear and the first bevel gear in the shaft, and the top of the pedestal rotates peace Equipped with vertical pivot, fixing sleeve is equipped with second gear on the vertical pivot, and second gear and first gear are meshed, the top of the vertical pivot Portion is fixedly installed with round tank, is fixedly installed with demarcation plate in the top inner wall of the round tank, and the demarcation plate is by round tank Inside be averagely divided into first interface and second interface, horizontal axis is rotatably equipped at the top of the pedestal, and fixed on horizontal axis It is arranged with the second bevel gear, second bevel gear and the first bevel gear are meshed, and one end of the horizontal axis, which is fixedly installed with, to be turned Disk, the turntable are rotatably connected to connecting rod far from the side of horizontal axis, and the bottom of the connecting rod and the top of slide plate rotate and connect It connects.

Preferably, it is fixedly installed with inclined plate on the side inner wall of the chamber, skewed slot, institute is offered at the top of the inclined plate It states and is placed with matched glass marble in skewed slot.

Preferably, the bottom of the object keeping box is fixedly installed with channel, and the top two sides in the channel are fixedly installed with pair Claim two limit plates of setting, the side in the channel extends to the top of first interface.

Preferably, symmetrically arranged two fixed blocks are fixedly installed at the top of the pedestal, two fixed blocks are and horizontal Axis rotation connection, the horizontal axis pass through the rotation connection of the top of two fixed blocks and pedestal.

Preferably, the object keeping box is equipped with the import being connected with chamber, and import is funnel shaped.

Compared with prior art, the utility model has the beneficial effects that needing to carry out probability demonstration using the teaching aid ontology When, first teacher need to multiple glass marbles to be tested be placed in object keeping box, restart servo motor, make shaft and perpendicular Axis is rotated, and then rotates first interface and second interface, and at the same time, the first bevel gear drives horizontal axis and turntable The folding for being rotated, and then making connecting rod that slide plate up and down reciprocatingly be pulled to keep the opening of object keeping box reciprocal, connecting rod rise to most When high point, next glass marble can only be once fallen, when all whereabouts first interfaces of the glass marble in object keeping box and second interface, is stopped It only demonstrates, is compared by the conclusion and written data that actually obtain.

The utility model structure is simple, and it is convenient to operate, and the demonstration of probability problem is carried out by setting teaching aid ontology, makes to explain It is more intuitive, the understanding of probability is carried out convenient for student, is improved teacher and is carried out the efficiency that probability is given lessons.

Detailed description of the invention

Fig. 1 be the utility model proposes a kind of mathematical probabilities demonstration teaching aid part-structure three-dimensional figure；

Fig. 2 be the utility model proposes a kind of mathematical probabilities demonstration teaching aid structural schematic diagram；

Fig. 3 be the utility model proposes a kind of mathematical probabilities demonstration teaching aid A schematic enlarged-scale view.

In figure: 1 pedestal, 2 mounting plates, 3 object keeping boxes, 4 chambers, 5 inclined plates, 6 imports, 7 slide plates, 8 skewed slots, 9 channels, 10 limits Plate, 11 servo motors, 12 shafts, 13 first gears, 14 vertical pivots, 15 second gears, 16 round tanks, 17 demarcation plates, 18 first connect Mouth, 19 second interfaces, 20 first bevel gears, 21 horizontal axis, 22 second bevel gears, 23 turntables, 24 connecting rods.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.

Referring to Fig.1-3, the top two sides of a kind of mathematical probabilities demonstration teaching aid, including pedestal 1, pedestal 1 are fixedly mounted respectively There are mounting plate 2 and servo motor 11, the side of mounting plate 2 is fixedly installed with the object keeping box 3 of a side opening, and object keeping box 3 is equipped with Chamber 4, the opening of chamber 4 are slidably fitted with slide plate 7, and slide plate 7 is completely covered the opening of object keeping box 3, servo motor 11 it is defeated Shaft 12 is fixedly installed on shaft, fixing sleeve is equipped with first gear 13 and the first bevel gear 20, the top of pedestal 1 in shaft 12 It is rotatably equipped with vertical pivot 14, fixing sleeve is equipped with second gear 15 on vertical pivot 14, and second gear 15 and first gear 13 are meshed, The top of vertical pivot 14 is fixedly installed with round tank 16, and demarcation plate 17, demarcation plate are fixedly installed in the top inner wall of round tank 16 The inside of round tank 16 is averagely divided into first interface 18 and second interface 19 by 17, and the top of pedestal 1 is rotatably equipped with horizontal axis 21, and fixing sleeve is equipped with the second bevel gear 22 on horizontal axis 21, the second bevel gear 22 and the first bevel gear 20 are meshed, horizontal axis 21 One end is fixedly installed with turntable 23, and turntable 23 is rotatably connected to connecting rod 24, the bottom of connecting rod 24 far from the side of horizontal axis 21 It is rotatablely connected with the top of slide plate 7, when needing to carry out probability demonstration using the teaching aid ontology, teacher will need to test first Multiple glass marbles be placed in object keeping box 3, restart servo motor 11, rotate shaft 12 and vertical pivot 14, and then make First interface 18 and second interface 19 are rotated, and at the same time, the first bevel gear 20 drives horizontal axis 21 and 23 turns of turntable Folding that is dynamic, and then making connecting rod 24 that slide plate 7 up and down reciprocatingly be pulled to keep the opening of object keeping box 3 reciprocal, connecting rod 24 rise to most When high point, next glass marble can only be once fallen, when the glass marble in object keeping box 3 all whereabouts first interface 18 and second interface 19 When, stopping demonstration, is compared by the conclusion and written data that actually obtain, the utility model structure is simple, and it is convenient to operate, The demonstration that probability problem is carried out by setting teaching aid ontology, keeps explanation more intuitive, and the understanding of probability is carried out convenient for student, is mentioned High teacher carries out the efficiency that probability is given lessons, wherein the model HBS57 of servo motor 11.

In the utility model, inclined plate 5 is fixedly installed on the side inner wall of chamber 4, the top of inclined plate 5 offers skewed slot 8, Matched glass marble is placed in skewed slot 8, the bottom of object keeping box 3 is fixedly installed with channel 9, the top two sides in channel 9 Symmetrically arranged two limit plates 10 are fixedly installed with, the side in channel 9 extends to the top of first interface 18, the top of pedestal 1 Portion is fixedly installed with symmetrically arranged two fixed blocks, and two fixed blocks are rotatablely connected with horizontal axis 21, and horizontal axis 21 passes through two The rotation connection of the top of fixed block and pedestal 1, object keeping box 3 is equipped with the import 6 being connected with chamber 4, and import 6 is infundibulate Shape, need using the teaching aid ontology carry out probability demonstration when, first teacher need to multiple glass marbles to be tested be placed on In object keeping box 3, restart servo motor 11, rotate shaft 12 and vertical pivot 14, and then connects first interface 18 and second Mouth 19 is rotated, and at the same time, the first bevel gear 20 drives horizontal axis 21 and turntable 23 to be rotated, and then makes in connecting rod 24 The lower reciprocal folding for pulling slide plate 7 to keep the opening of object keeping box 3 reciprocal, when connecting rod 24 rises to highest point, can only once fall One glass marble stops demonstration, passes through reality when all whereabouts first interfaces 18 of the glass marble in object keeping box 3 and second interface 19 The conclusion and written data that border obtains are compared, and the utility model structure is simple, operate it is convenient, by setting teaching aid ontology into The demonstration of row probability problem keeps explanation more intuitive, and the understanding of probability is carried out convenient for student, improves teacher and carries out generally The efficiency that rate is given lessons.

Working principle: when needing to carry out probability demonstration using the teaching aid ontology, teacher will need to be tested more first A glass marble is placed in object keeping box 3, restarts servo motor 11, and the output shaft rotation of servo motor 11 drives shaft 12 and the One gear 13 is rotated, since first gear 13 and second gear 15 are meshed, so that second gear 15 and vertical pivot 14 can be into Row rotation, the rotation of vertical pivot 14 drive first interface 18 and second interface 19 to be rotated, and at the same time, the rotation of shaft 12 drives the One bevel gear 20 is rotated, since the first bevel gear 20 and the second bevel gear 22 are meshed, thus the second bevel gear 22 and Horizontal axis 21 will do it rotation, and the rotation of horizontal axis 21 drives turntable 23 to be rotated, and then connecting rod 24 is made up and down reciprocatingly to pull slide plate 7, so that slide plate 7 is carried out reciprocal longitudinal movement, and then make the opening of object keeping box 3 it is reciprocal open and close, the skewed slot 8 of setting makes often The glass marble of secondary whereabouts only one, when all whereabouts first interfaces 18 of the glass marble in object keeping box 3 and second interface 19, stop Demonstration, is compared by the conclusion and written data that actually obtain, and the demonstration of probability problem is carried out by setting teaching aid ontology, Explaining teacher, probability problem is more intuitive, and the understanding convenient for student to probability problem improves teacher's progress The efficiency that probability is given lessons.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (5)

1. a kind of mathematical probabilities demonstration teaching aid, including pedestal (1), which is characterized in that the top two sides of the pedestal (1) are solid respectively Dingan County is equipped with mounting plate (2) and servo motor (11), and the side of the mounting plate (2) is fixedly installed with the object keeping box of a side opening (3), the object keeping box (3) is equipped with chamber (4), and the opening of the chamber (4) is slidably fitted with slide plate (7), and slide plate (7) is complete The opening of all standing object keeping box (3) is fixedly installed with shaft (12), the shaft on the output shaft of the servo motor (11) (12) fixing sleeve is equipped with first gear (13) and the first bevel gear (20) on, is rotatably equipped with vertical pivot at the top of the pedestal (1) (14), fixing sleeve is equipped with second gear (15) on the vertical pivot (14), and second gear (15) and first gear (13) are meshed, It is fixedly installed with round tank (16), is fixedly installed in the top inner wall of the round tank (16) point at the top of the vertical pivot (14) The inside of round tank (16) is averagely divided into first interface (18) and second interface by partition (17), the demarcation plate (17) (19), it is rotatably equipped with horizontal axis (21) at the top of the pedestal (1), and fixing sleeve is equipped with the second bevel gear on horizontal axis (21) (22), second bevel gear (22) and the first bevel gear (20) are meshed, and one end of the horizontal axis (21), which is fixedly installed with, to be turned Disk (23), the turntable (23) are rotatably connected to connecting rod (24) far from the side of horizontal axis (21), the bottom of the connecting rod (24) Portion and the rotation connection of the top of slide plate (7).

2. a kind of mathematical probabilities demonstration teaching aid according to claim 1, which is characterized in that in the side of the chamber (4) Be fixedly installed on wall inclined plate (5), offered skewed slot (8) at the top of the inclined plate (5), be placed in the skewed slot (8) and its Compatible glass marble.

3. a kind of mathematical probabilities demonstration teaching aid according to claim 1, which is characterized in that the bottom of the object keeping box (3) It is fixedly installed with channel (9), the top two sides of the channel (9) are fixedly installed with symmetrically arranged two limit plates (10), institute The side for stating channel (9) extends to the top of first interface (18).

4. a kind of mathematical probabilities demonstration teaching aid according to claim 1, which is characterized in that the top of the pedestal (1) is solid Dingan County is equipped with symmetrically arranged two fixed blocks, and two fixed blocks pass through with horizontal axis (21) rotation connection, the horizontal axis (21) The rotation connection of the top of two fixed blocks and pedestal (1).

5. a kind of mathematical probabilities demonstration teaching aid according to claim 1, which is characterized in that the object keeping box (3) is equipped with The import (6) being connected with chamber (4), and import (6) is funnel shaped.