CN218939110U

CN218939110U - Friction angle demonstration instrument

Info

Publication number: CN218939110U
Application number: CN202222943404.7U
Authority: CN
Inventors: 邱坤然
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-06
Filing date: 2022-11-06
Publication date: 2023-04-28
Anticipated expiration: 2032-11-06

Abstract

The utility model relates to the technical field of physical teaching instruments, in particular to a friction angle demonstration instrument which comprises a base, a conveyor belt, a driving wheel and a driven wheel, wherein an integral frame plate is rotatably connected to the base, an inclination angle adjusting device is arranged between the base and the integral frame plate, a graduated scale is fixedly arranged on the base, the graduated scale is contacted with the side surface of the integral frame plate, the upper surface of the integral frame plate is an arc concave surface, a scribing line is arranged on the side surface of the integral frame plate, which is contacted with the graduated scale, a driving assembly is fixedly connected to the side edge of the integral frame plate, the driving wheel is rotatably connected to the lower end of the integral frame plate, the driven wheel is rotatably connected to the upper end of the integral frame plate, and the driving wheel is driven by the driving assembly. According to the utility model, the friction angle can be judged and the tangent value can be read only by the eyesight without measuring force or judging uniform speed, so that the appearance structure of the instrument is simplified, a demonstration experiment is facilitated, the inconvenience caused by the fact that a flat conveyor belt is adopted to lift or slide in one direction of an object in the adjusting process is reduced, and the experimental efficiency is improved.

Description

Friction angle demonstration instrument

Technical Field

The utility model relates to the technical field of physical teaching instruments, in particular to a friction angle demonstration instrument.

Background

Stress analysis is a physical dynamics foundation of high school and is also a difficulty of physical teaching of high school. In particular, the force analysis on a rough inclined plane is sometimes complicated to solve by a conventional method, and students cannot solve the problem due to the hysteresis of mathematical knowledge. If the 'friction angle' knowledge is used for solving, complicated mathematical calculation can be reduced, so that the thought of the analysis problem becomes clear. The friction angle is not found in the teaching materials in high school, if the teacher simply teaches the introduction, the teacher can not help students solve the problems, but also can disturb the thinking of the students and increase the learning burden. During high school physical education, in order to reduce student study difficulty, improve student physical study efficiency and interest, teacher can rationally utilize self-made teaching aid to set up teaching mode, transfer student study enthusiasm, reinforcing student physical study experience improves student physical core literacy. It is known that the inclination of a slope when an object happens to slide down a rough slope at a constant speed is called the rubbing angle. If this angle is measured, the dynamic friction factor between the object and the bevel can be determined, i.e. μ=tan θ. However, it is difficult to determine the kinetic friction factor by this method because it is difficult to distinguish whether the object is actually moving at a constant speed by means of the eye force.

The existing experimental method and device for measuring the dynamic friction factor by the friction angle method often lead the object to slide downwards at a constant speed by adjusting the inclined plane inclination angle, not only are speed measuring instruments added to assist in experiments, but also the object is repeatedly placed in the adjusting process, the experimental process looks simple, practical and complex, and the experimental efficiency is low. The friction angle covers the concept of friction force, the existing friction force demonstrator, especially of a conveyor belt type, is high in experimental efficiency and good in effect, and if the friction force demonstrator is used on an inclined plane, an object can slide downwards relative to the conveyor belt and is static relative to the inclined plane, and the balance state can be judged by means of eyesight, so that the friction angle is further measured. This scheme is although can solve traditional friction angle experiment and need to be measured speed, place the problem of object repeatedly, but introduced the new problem that needs to increase inclination at friction force demonstration appearance outside and adjust and measuring device, also can not find the equilibrium point fast, can't promote experiment operation convenience and experimental efficiency. There is therefore a need for a friction angle demonstrator that ameliorates the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a friction angle demonstration instrument for solving the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a friction angle demonstration appearance, includes base, conveyer belt, action wheel, follows the driving wheel, it is connected with whole frame plate to rotate on the base, the base with be equipped with inclination adjustment device between the whole frame plate, fixed scale that is equipped with on the base, the scale with the side contact of whole frame plate, the upper surface of whole frame plate is the arc concave surface, whole frame plate with the side that the scale contacted is equipped with the line, whole frame plate side fixedly connected with drive assembly, the action wheel rotate connect in the lower extreme of whole frame plate, from the driving wheel rotate connect in the upper end of whole frame plate, the action wheel by the drive assembly drive.

Further, the inclination angle adjusting device is a mechanical component for adjusting an included angle between the base and the integral frame plate, and the driving assembly consists of a power supply module, a motor and a transmission mechanism.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the friction angle can be judged and the tangent value can be read only by the eyesight without measuring force or judging uniform speed.

2. In the utility model, the design of the integral plate frame and the driving assembly can simplify the appearance structure of the instrument, and is convenient for demonstration experiments.

3. In the utility model, the driving wheel is arranged at the lower end of the integral plate frame and the upper surface of the integral plate frame is designed into an arc-shaped concave surface, so that inconvenience caused by lifting or sliding of an object in one direction in the adjusting process by adopting a flat conveyor belt is reduced, and the experimental efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of a friction angle demonstrator.

Fig. 2 is a schematic side view of a part of a friction angle demonstrator.

In the figure: the device comprises a base, a 2-conveying belt, a 3-driving wheel, a 4-driven wheel, a 5-driving assembly, a 6-integral frame plate, 61-arc concave surfaces, 62-scribing lines, a 7-dip angle adjusting device and 8-graduated scales.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

Referring to fig. 1-2, the present utility model provides a technical solution.

The friction angle demonstration instrument comprises a base 1, a conveyor belt 2, a driving wheel 3 and a driven wheel 4, wherein an integral frame plate 6 is rotatably connected to the base 1, the integral frame plate is a part which integrates a driving wheel bracket and a conveyor belt supporting plate, and the appearance structure of the instrument is simplified; an inclination angle adjusting device 7 is arranged between the base 1 and the integral frame plate 6, and the inclination angle adjusting device 7 is a mechanical component for adjusting an included angle between the base 1 and the integral frame plate 6 and can be implemented by adopting a screw rod structure, a worm structure, a gear set structure and the like; the base 1 is fixedly provided with the graduated scale 8, the graduated scale 8 is contacted with the side surface of the integral frame plate 6, the side surface of the integral frame plate 6 contacted with the graduated scale 8 is provided with the dividing line 62, in the inclination angle adjusting process, as the length of the bottom edge of the right triangle formed by the dividing line, the graduated scale and the base is unchanged, the graduation of the graduated scale can be replaced by the conversion of the ratio of the corresponding length to the bottom edge, the tangent value of the inclination angle of the inclined plane can be read directly through the intersection of the dividing line and the graduated scale to obtain the mu value required by the experiment, the calculating step is omitted, and the experimental efficiency is improved; the upper surface of the integral frame plate 6 is an arc concave 61, the driving wheel 3 is rotationally connected to the lower end of the integral frame plate 6, the driven wheel 4 is rotationally connected to the upper end of the integral frame plate 6, the purpose of the design is that when the conveyor belt runs, the upper edge of the conveyor belt is a loose edge, the arc concave can be better attached to the arc concave, the purpose of the arc concave design is that the inclination angle of the upper end of the inclined conveyor belt is slightly larger, the inclination angle of the lower end is slightly smaller, the middle position is parallel to a scribing line, namely, an object stays at the middle position or swings symmetrically up and down in the middle position, at the moment, the balance state can be judged, if the upward swinging distance of the object is larger than the downward distance, the inclination angle is excessively smaller, the direction of the upward swinging distance is adjusted, and the downward swinging distance is greatly reduced, and the design is obtained by adopting a dynamic leveling method by referring to an air cushion guide rail, so that inconvenience caused by the fact that the object rises or slides in a single direction in the adjustment process can be reduced, and experimental efficiency is improved; the side of the integral frame plate 6 is fixedly connected with a driving assembly 5, the driving wheel 3 is driven by the driving assembly 5, the driving assembly 5 is composed of a power module, a motor and a transmission mechanism, and the appearance structure of the instrument is simplified by adopting integral modularized design, so that the device is convenient to use.

In the description of the present utility model, it should be understood that the terms "upper", "upper surface", "between", "side", "upper", "lower", "middle", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

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 friction angle demonstration appearance, includes base (1), conveyer belt (2), action wheel (3), follows driving wheel (4), its characterized in that: the utility model discloses a novel integrated frame plate structure, including base (1), whole frame plate (6) are connected with in the rotation on base (1), base (1) with be equipped with inclination adjustment device (7) between whole frame plate (6), fixed scale (8) that are equipped with on base (1), scale (8) with the side contact of whole frame plate (6), the upper surface of whole frame plate (6) is arc concave (61), whole frame plate (6) with the side that scale (8) contacted is equipped with score line (62), whole frame plate (6) side fixedly connected with drive assembly (5), action wheel (3) rotate connect in the lower extreme of whole frame plate (6), from driving wheel (4) rotate connect in the upper end of whole frame plate (6), action wheel (3) by drive assembly (5) drive.

2. A friction angle demonstrator as claimed in claim 1, wherein: the inclination angle adjusting device (7) is a mechanical component for adjusting an included angle between the base (1) and the integral frame plate (6), and the driving assembly (5) consists of a power supply module, a motor and a transmission mechanism.