CN209980576U

CN209980576U - Physics teaching mechanics testing arrangement

Info

Publication number: CN209980576U
Application number: CN201920560204.9U
Authority: CN
Inventors: 戴郑旭
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-01-21
Anticipated expiration: 2029-04-23

Abstract

The utility model belongs to the technical field of experiment teaching aids for physics teaching of middle school students, which comprises a circular base, wherein a plurality of slidable supporting columns are uniformly arranged on the circular base, a fixed pulley is arranged at the top end of each supporting column, and the groove of the fixed pulley faces to the circle center of the circular base; circular base top surface central point puts and is provided with the fixing base, is fixed with the spring dynamometer on the fixing base, and the top of spring dynamometer is connected with the fine rule, and its free end of fixed pulley is walked around to the fine rule is connected with the weight. The utility model discloses a hang the weight at the fine rule free end that walks around the fixed pulley, read the numerical value of spring dynamometer after stable, measure the weight of contained angle and weight between the fine rule, then decide to calculate according to the parallelogram and close to resultant force, verify at last whether the resultant force of asking is identical with the numerical value of spring dynamometer to whether the synthesis of verifying the power under three-dimensional situation follows the parallelogram with the decomposition and decides the rule. The device has the advantages of simple structure, visual demonstration, clear experimental thought and easy understanding by students.

Description

Physics teaching mechanics testing arrangement

Technical Field

The utility model belongs to the technical field of middle school student's physical teaching is with experiment teaching aid, concretely relates to physical teaching mechanics testing arrangement.

Background

Mechanics is a relatively important part in a physical course, and the synthesis and decomposition of force, especially the key part in mechanics, are relatively abstract, so that language and graphic description are difficult to understand, at present, the teaching aids for the synthesis and decomposition of force are few, and common experimental equipment is used for carrying out experiments on the synthesis of two or more forces on the same plane, and cannot meet the requirement of high quality at present.

With the continuous improvement of the teaching quality standard, students can learn and recognize the stress analysis under the three-dimensional situation as soon as possible, the method is a foundation of future education for cultivating and improving the space imagination of the students, and the method verifies that the synthesis of the force follows the parallelogram rule and whether the resultant force and the elasticity are within the error range under the three-dimensional situation, so that the scientific spirit and the space imagination for exploration of the students are cultivated.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a physical teaching mechanics testing arrangement verifies whether the synthesis of power follows the parallelogram rule through three-dimensional model, and this device simple structure, student understand easily, easily promote.

The to-be-solved technical problem of the utility model is realized through following technical scheme: the supporting device comprises a circular base, wherein a plurality of supporting columns are uniformly arranged on the circular base, a fixed pulley is arranged at the top end of each supporting column, and a groove of each fixed pulley faces to the circle center of the circular base;

circular base top surface central point puts and is provided with the fixing base, is fixed with the spring dynamometer on the fixing base, and the top of spring dynamometer is connected with the fine rule, and its free end of fixed pulley is walked around to the fine rule is connected with the weight.

Further, many T type grooves are evenly provided with on circular base surface, install the slider in every T type groove, the bottom fixed connection of slider and pillar.

Furthermore, a plurality of bolt grooves are uniformly formed in the top surface of the circular base, and the bolt grooves and the sliding blocks are fixed through bolts.

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

1. the utility model discloses can be under three-dimensional sight, through the position that changes weight and/or slider, during stable, measure the weight of contained angle and weight between the fine rule, calculate its resultant force according to parallelogram rule, verify whether its resultant force is the same with the elasticity of spring dynamometer when stable or in error range.

2. The utility model discloses can demonstrate the synthesis and the decomposition of a plurality of forces under three-dimensional stereo sight, under the certain circumstances of resultant force spring dynamometry count value, through the position that changes the component slider and the weight of weight, during the balance, the student can calculate the size of component when different angles according to the weight of weight, and guide classmates that can be quick establish the synthesis of force and the notion of decomposition can improve teaching efficiency.

Drawings

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

FIG. 2 is a front view of the present invention;

fig. 3 is a top view of the present invention.

In the figure: 1. a circular base; 2. a pillar; 3. a spring load cell; 4. a fixed pulley; 5. a thin wire; 6. a weight; 7. a bolt; 11. a T-shaped groove; 12. a bolt slot; 13. a fixed seat; 21. a slide block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It is to be understood that such description is merely illustrative and not restrictive of the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Example (b): a physical teaching mechanics testing device comprises a circular base 1, wherein a plurality of supporting columns 2 are uniformly arranged on the circular base 1, a fixed pulley 4 is installed at the top end of each supporting column 2, and a groove of each fixed pulley 4 faces to the circle center of the circular base; the central point of the top surface of the circular base 1 is provided with a fixed seat 13, a spring dynamometer 3 is fixed on the fixed seat 13, the top end of the spring dynamometer 3 is connected with a fine wire 5, the fine wire 5 bypasses the free end of a fixed pulley 4 and is connected with a weight 6, the end part of the preferable fine wire 5 bypassing the fixed pulley 4 is provided with a weight hook, the weight hook is provided with a weight 6 with a hook, and the weights 6 with different weights and quantities can be replaced conveniently as required.

As shown in fig. 1-3, in the present embodiment, four T-shaped grooves 11 are uniformly formed on a circular base 1, a slidable slider 21 is installed in each T-shaped groove 11, a cross section of the slider 21 is "i" shaped, a top end of the slider 21 is fixedly connected to a bottom end of a pillar 2, a plurality of bolt grooves 12 are uniformly formed on a top surface of the circular base 1 for fixing the circular base 1 and the slider 21, the bolt grooves 12 are T-shaped bolt grooves, the T-shaped bolt grooves 12 are uniformly distributed on two sides of the slider 21, heads of bolts 7 are clamped in the T-shaped bolt grooves 12, and the slider 21 is detachably connected to the circular base 1 through nuts matched with the bolts 7. Through the arrangement, the position of the sliding block 21 can be changed, and the composition and the decomposition of force in different three-dimensional scene states can be demonstrated.

As shown in fig. 1-3, in the experiment, after the position of the slide block 21 is determined, the slide block 21 is detachably fixed on the round base 1 through the bolt 7, one end of each of the two thin wires 5 is fixed at the top end of the spring dynamometer 3, the other end of each of the two thin wires 5 respectively passes through the fixed pulley 4 at the top end of any one of the pillars 2, and a proper number of weights 6 are hung at the end part of each thin wire 5 passing through the fixed pulley 4; when the stability is met, the included angle between the thin lines 5 and the weight of the weight 6 are measured, the numerical value of the spring dynamometer at the moment is read, then the magnitude of the resultant force at the moment is calculated according to the parallelogram rule, and the magnitude of the resultant force is compared with the numerical value of the spring dynamometer so as to verify whether the calculated resultant force is the same as the numerical value of the spring dynamometer during the stability or in an error range. In addition, when the value of the spring dynamometer is kept constant, the student can calculate the magnitude of the component force at different angles according to the weight of the weight when the balance is achieved by adjusting the position of the slide block 21 and the weight of the weight 6, so that the students can be quickly guided to build a concept of force synthesis and decomposition, and the teaching efficiency can be improved.

The device can also demonstrate the synthesis and decomposition experiments of three or four forces in a three-dimensional state. For example, when there are three components, one end of each of the three threads 5 is fixed on the top end of the spring dynamometer 3, the other end of each of the three threads 5 passes around the fixed pulley 4 on the top end of any one of the pillars 2, and an appropriate number of weights 6 are hung on the end of each of the threads 5 passing around the fixed pulley 4; when the stability is reached, the included angle between every two thin lines 5 and the weight of the weight 6 are measured, the measured result is drawn on a drawing board, the resultant force of any two thin lines is obtained according to the parallelogram rule, the total resultant force of the three thin lines and the total resultant force of the third thin line are obtained by using the parallelogram rule, and finally the total resultant force is compared with the numerical value of the spring dynamometer in the stability to verify whether the obtained total resultant force is matched with the numerical value of the spring dynamometer, so that whether the synthesis and decomposition of the force in the three-dimensional situation follow the parallelogram rule is verified. Similarly, the device can also verify whether the composition and the decomposition of the four components in the three-dimensional situation follow the parallelogram rule.

The four pillars are provided in the embodiment, which is a typical application, and is not a limitation of the present invention, and if the situation of more than four component forces needs to be verified, the four pillars may be uniformly provided on the circular base 1 as required.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a physical teaching mechanics testing arrangement which characterized in that: the supporting device comprises a circular base (1), wherein a plurality of supporting columns (2) are uniformly arranged on the circular base (1), a fixed pulley (4) is installed at the top end of each supporting column (2), and a groove of each fixed pulley (4) faces to the circle center of the circular base (1);

circular base (1) top surface central point puts and is provided with fixing base (13), be fixed with spring dynamometer (3) on fixing base (13), the top of spring dynamometer (3) is connected with fine rule (5), its free end of fixed pulley (4) is walked around in fine rule (5) is connected with weight (6).

2. The physical teaching mechanical testing device of claim 1, wherein: circular base (1) surface evenly is provided with many T type grooves (11), every install slider (21) in T type groove (11), the bottom fixed connection of slider (21) and pillar (2).

3. The physical teaching mechanical testing device of claim 2, wherein: a plurality of bolt grooves (12) are uniformly formed in the top surface of the circular base (1), and the bolt grooves (12) and the sliding blocks (21) are fixed through bolts (7).