CN219695912U

CN219695912U - Random sampling device for probability demonstration

Info

Publication number: CN219695912U
Application number: CN202320680578.0U
Authority: CN
Inventors: 李莉; 商亚静; 邓幸; 季永会; 郝义; 商乂川
Original assignee: Baicheng Vocational And Technical College
Current assignee: Baicheng Vocational And Technical College
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-09-15
Anticipated expiration: 2033-03-31

Abstract

The utility model discloses a probability demonstration random sampling device which comprises a barrel, wherein a bracket is fixedly connected to the outer wall of the barrel in a regular triangle state, bases are fixedly connected to the left and right side walls of the barrel, an electric telescopic rod is mounted on the upper surface of the base, one end of a connecting rod is fixedly connected to the output end of the electric telescopic rod, a sampling barrel is fixedly connected to the inside of a connecting ring, an outlet is formed in the front surface of the sampling barrel, an underframe is fixedly connected to the bottom of the barrel, and a motor is mounted in the underframe. This probability demonstration random sampling device drives the bottom plate through the motor and rotates, makes the sampling ball guarantee that rolling state has mobility, also furthest guarantees the randomness of sampling process, and under electric telescopic handle by time relay switch control's random automatic flexible, the sampling tube is sample along with the decline, and the sampling ball has also been sampled at random, has reached the effect that automatic and the biggest randomness was sampled, has guaranteed the accuracy of probability demonstration experiment and has gone on.

Description

Random sampling device for probability demonstration

Technical Field

The utility model relates to the technical field of probability statistics, in particular to a probability demonstration random sampling device.

Background

Probability statistics generally refer to the axiom of probabilities. Although many events may occur in a random sample, the most likely event (outcome) to occur (be encountered) is the most probable event. The expression of the probability axiom uses three words, namely 'one random sample', 'most easy to appear' and 'probability'. This axiom can also be expressed in reverse: the "highest probability event in one random sample" is the most likely event to occur (be encountered). "random sampling" is a term used in statistics that allows you to arbitrarily take one (and sometimes a batch of samples together as one experiment) from a multitude of subjects as a sample of the study without subjective bias. The sampling is performed only once, and is not allowed to be unsatisfactory for the first time, and another sample is taken. For the random sampling of the probability, the probability is expressed more intuitively, and is generally demonstrated in an experimental mode, but no better device exists at present, and the probability random sampling experiment is ensured to be carried out at maximum randomness.

Disclosure of Invention

The utility model aims to provide a probability demonstration random sampling device for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a probability demonstration sampling device at random, includes the barrel, the outer wall of barrel is regular triangle state rigid coupling has the support, the equal rigid coupling of left and right sides wall of barrel has the base, the last surface mounting of base has electric telescopic handle, electric telescopic handle's output rigid coupling has the one end of connecting rod, two the other end rigid coupling of connecting rod has the retainer plate, the inside rigid coupling of retainer plate has a sampling tube, the positive surface of sampling tube is opened there is the export, the bottom rigid coupling of barrel has the chassis, the internally mounted of chassis has the motor, the output of motor runs through the barrel, and the motor is located the inside output outer wall rigid coupling of barrel and have the bottom plate, a plurality of sampling ball has been placed to the inside of barrel, the bottom center department left and right sides of sampling tube all is equipped with the holding tube, the both ends grafting of holding tube has the one end of plug rod, the inside of holding tube and plug rod's installation department are equipped with buffer, the other end through spacing groove and sampling tube slip joint, and spacing groove open in the inner wall of sampling tube.

Preferably, the upper surface of the bottom plate is fixedly connected with a convex line.

Preferably, the buffer device comprises a compression spring, a first stop block and a second stop block, wherein the first stop block and the second stop block are respectively provided with two first stop blocks which are fixedly connected to the outer wall of the insertion rod respectively, the second stop block is fixedly connected to the inner wall of the clamping pipe respectively, the compression spring is sleeved on the outer wall of the insertion rod, two ends of the compression spring are respectively attached to the first stop block and the second stop block, a chute is formed in the position, close to the first stop block, of the inner wall of the clamping pipe, and the first stop block is in sliding clamping connection with the chute.

Preferably, the outer wall of the clamping pipe is sleeved with a rotating pipe.

Preferably, the sampling ball is made of plastic.

Compared with the prior art, the utility model has the beneficial effects that: this probability demonstration random sampling device drives the bottom plate through the motor and rotates, makes the sampling ball guarantee that rolling state has mobility, also furthest guarantees the randomness of sampling process, and under electric telescopic handle by time relay switch control's random automatic flexible, the sampling tube is sample along with the decline, and the sampling ball has also been sampled at random, has reached the effect that automatic and the biggest randomness was sampled, has guaranteed the accuracy of probability demonstration experiment randomness and has gone on.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a bottom view of the sampling cartridge of the present utility model;

FIG. 4 is an enlarged view of the utility model at A of FIG. 3;

fig. 5 is an enlarged view of fig. 3B in accordance with the present utility model.

In the figure: 1-barrel, 2-support, 3-base, 4-electric telescopic rod, 5-connecting rod, 6-connection ring, 7-sampling tube, 8-export, 9-motor, 10-chassis, 11-convex pattern, 12-sampling ball, 13-bottom plate, 14-clamping tube, 15-insertion rod, 16-rotating tube, 17-compression spring, 18-first dog, 19-spout, 20-second dog, 21-spacing groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the utility model provides a probability demonstration random sampling device, which comprises a barrel 1, wherein the barrel 1 is a main body of the device, a bracket 2 is fixedly connected to the outer wall of the barrel 1 in a regular triangle state, nails 2 can more stably support the barrel 1 by adopting regular triangle three-way distribution, a base 3 is fixedly connected to the left side wall and the right side wall of the barrel 1, an electric telescopic rod 4 is carried on the base 3, the electric telescopic rod 4 provides power for sampling, the electric telescopic rod 4 is controlled by a time relay switch, the energizing time is set to be random, the electric telescopic rod 4 descends to take, ascends to take out, the upper surface of the base 3 is provided with the electric telescopic rod 4, one end of a connecting rod 5 is fixedly connected to the output end of the electric telescopic rod 4, a connecting ring 6 is fixedly connected to the other ends of the two connecting rods 5, the connecting rod 5 is carried on the connecting ring 6, the connecting ring 6 is positioned right above the barrel 1, and the sampling tube 7 is carried on, the sampling tube 7 is of a sampling structure, the sampling tube 7 is fixedly connected inside the connecting ring 6, an outlet 8 is formed on the front surface of the sampling tube 7, a sampling ball 12 flows out from the outlet 8, the plane position of the outlet 8 is consistent with the position of the sampling ball 12 entering the inside of the sampling tube 7, the bottom of the cylinder 1 is fixedly connected with a bottom frame 10, the bottom frame 10 is provided with a motor 9, the motor 9 drives a bottom plate 13 to rotate, the bottom plate 13 rotates to enable the sampling ball 12 to roll inside the cylinder 1, the random of the sampling ball 12 at any time is ensured, the bottom plate 13 is concave, the sampling ball 12 has a trend of rolling towards the middle, in order to receive sampling of the sampling tube 7, the motor 9 is arranged inside the bottom frame 10, the output end of the motor 9 penetrates through the cylinder 1, the bottom plate 13 is fixedly connected with the outer wall of the output end of the motor 9 positioned inside the cylinder 1, a plurality of sampling balls 12 are placed inside the cylinder 1, the sampling ball 12 is the sample of taking a sample, select to place in the inside of barrel 1 according to the quantity of taking a sample, and carry out actual project needs on every sampling ball 12 and mark, the bottom center department left and right sides of sampling tube 7 all is equipped with clamping tube 14, clamping tube 14 is the structure that limits sampling tube 7 bottom, sampling ball 12 extrusion two clamping tubes 14 separately when sampling tube 7 descends, then the inside that sampling ball 12 extruded into sampling tube 7 accomplishes the sample, clamping tube 14 has the one end of peg graft pole 15 with the both ends of sampling tube clamping tube 14, peg graft pole 15 can stretch out and draw back in the inside of clamping tube 14, can make clamping tube 14 peg graft pole 15 extrusion shrink when the atress like this, the inside of clamping tube 14 and the installation department of peg 15 are equipped with buffer, buffer has elasticity, after peg 15 shrink, also can reset because buffer's effect, peg 15's the other end passes through spacing groove 21 and sampling tube 7 slip joint, and spacing groove 21 opens in the inner wall of sampling tube 7, peg 15 can slide in the inside of spacing groove 21 when moving, there is sufficient space.

Specifically, the upper surface of the bottom plate 13 is fixedly connected with the convex lines 11, the convex lines 11 increase the friction force of the surface of the bottom plate 13, and the sampling ball 12 is prevented from slipping when rolling during rotation.

Specifically, the buffer device comprises a compression spring 17, a first stop block 18 and a second stop block 20, wherein the two first stop blocks 18 and the two second stop blocks 20 are respectively arranged, the first stop blocks 18 and the second stop blocks 20 are support structures at two ends of the compression spring 17, the two first stop blocks 18 and the second stop blocks 20 are used for supporting the compression spring 17 to provide elastic support points, the elasticity of the compression spring 217 pushes the first stop blocks 18 to drive the inserting connection rod 15 to reset, the two first stop blocks 18 are fixedly connected to the outer wall of the inserting connection rod 15 respectively, the second stop blocks 20 are fixedly connected to the inner wall of the clamping tube 14 respectively, the compression spring 17 is sleeved on the outer wall of the inserting connection rod 15, two ends of the compression spring 17 are respectively attached to the first stop blocks 18 and the second stop blocks 20, a sliding groove 19 is formed in the position, close to the first stop blocks 18, of the first stop blocks 18 are in sliding clamping connection with the sliding grooves 19, and the sliding grooves 19 limit the movement track of the first stop blocks 18 in the straight line direction, so that the movement stability of the inserting connection rod 15 is ensured.

Specifically, the outer wall of the clamping tube 14 is sleeved with a rotating tube 16, and the rotating tube 16 rotates on the outer wall of the clamping tube 14 when the sampling ball 12 is extruded in, so that rolling friction drives sliding friction, and the smoothness of the sampling ball 12 entering the sampling tube 7 is improved.

Specifically, the sampling ball 12 is made of plastic, the plastic is light and smooth when rolling on the bottom plate 13, and the service life of the material is prolonged.

Working principle: according to the quantity of the sampling balls 12 selected according to actual needs, marking of project needs is carried out on the surfaces of the sampling balls 12, then the sampling balls are thrown into the barrel 1, a motor 9 works to drive a bottom plate 13 to rotate, the sampling balls 12 roll in the barrel 1 to generate randomness, then an electric telescopic rod 4 is retracted to drive a connecting rod 5 and a connecting ring 6 to descend, the connecting ring 6 drives a sampling tube 7 to descend to the inside of the barrel 1 to sample, the sampling balls 12 are separated by the sampling tube 7, the clamping tube 14 is extruded by the sampling balls 12, the clamping tube 14 is extruded by the inserting rod 15 to drive a compression spring 17 to deform, the inserting rod 15 is retracted into the clamping tube 14, the distance between the clamping tubes 14 is increased, the sampling balls 12 are extruded between the clamping tubes 14, the sampling balls enter the inside of the sampling tube 7, then the electric telescopic rod 4 stretches and resets, then the sampling balls 12 flow out from an outlet 8, and repeated random sampling is carried out along with repeated stretching of the electric telescopic rod 4.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a probability demonstration sampling device at random, includes barrel (1), its characterized in that: the utility model discloses a buffer tube, including barrel (1) and buffer tube, the outer wall of barrel (1) is regular triangle state rigid coupling has support (2), the equal rigid coupling of left and right sides wall of barrel (1) has base (3), the last surface mounting of base (3) has electric telescopic handle (4), the output rigid coupling of electric telescopic handle (4) has the one end of connecting rod (5), two the other end rigid coupling of connecting rod (5) has tie-ring (6), the inside rigid coupling of tie-ring (6) has sampling tube (7), the positive surface of sampling tube (7) is opened there is export (8), the bottom rigid coupling of barrel (1) has chassis (10), the internally mounted of chassis (10) has motor (9), the output of motor (9) runs through barrel (1), and motor (9) are located inside output outer wall rigid coupling of barrel (1) has bottom plate (13), the inside of barrel (1) has placed a plurality of sampling ball (12), the bottom center department left and right sides of sampling tube (7) all is equipped with clamping tube (14), the inside of clamping tube (14) has plug-in tube (15) and the inside plug-in connection device of the end (15) has plug-in connection rod (15) and the one end (15), and the limit groove (21) is arranged on the inner wall of the sampling tube (7).

2. A probabilistic demonstration random sampling apparatus as claimed in claim 1, wherein: the upper surface of the bottom plate (13) is fixedly connected with a convex line (11).

3. A probabilistic demonstration random sampling apparatus as claimed in claim 1, wherein: the buffer device comprises a compression spring (17), a first stop block (18) and a second stop block (20), wherein the first stop block (18) and the second stop block (20) are respectively fixedly connected to the outer wall of the plug-in rod (15), the second stop block (20) is respectively fixedly connected to the inner wall of the clamping tube (14), the compression spring (17) is sleeved on the outer wall of the plug-in rod (15), two ends of the compression spring (17) are respectively attached to the first stop block (18) and the second stop block (20), a sliding groove (19) is formed in the position, close to the first stop block (18), of the inner wall of the clamping tube (14), and the first stop block (18) is in sliding clamping connection with the sliding groove (19).

4. A probabilistic demonstration random sampling apparatus as claimed in claim 1, wherein: the outer wall of the clamping pipe (14) is sleeved with a rotary pipe (16).

5. A probabilistic demonstration random sampling apparatus as claimed in claim 1, wherein: the sampling ball (12) is made of plastic.