CN206411965U - A kind of mechanics teaching demonstration device - Google Patents

Abstract

The utility model discloses a demonstration device for mechanics teaching, which comprises a base. Support rods are fixedly installed on the left and right sides of the top of the base, and a first rotating rod is installed on the inner side of the supporting rod. The left and right ends of the rod are respectively fixed with clamping plates and handles, the connection between the first rotating rod and the support rod is installed with a first collar, and the right outer wall of the first rotating rod is threadedly connected with a threaded sleeve. A connecting cylinder is installed on the right side of the threaded sleeve, and a demonstration device is fixedly installed on the top of the first rotating rod. The demonstration device includes a device shell, and baffles are fixedly installed around the top of the device shell. A first friction pad, a second friction pad and a glass fiber sheet are sequentially provided on the upper surface of the shell from left to right. The mechanics teaching demonstration device, through the cooperation of the first rotating rod, the threaded sleeve, the connecting cylinder and the demonstration device, demonstrates the principles of mechanics more vividly and intuitively, which is easier for students to understand and improves the teaching quality.

Description

A teaching demonstration device for mechanics

technical field

The utility model relates to the technical field of teaching appliances, in particular to a mechanics teaching demonstration device.

Background technique

In physics teaching courses, mechanics is a relatively important part of physics courses. During the teaching process, experimental demonstrations are carried out through experimental teaching aids, so that students can understand and master many principles of mechanics more intuitively, such as the principle of leverage. This kind of auxiliary experimental equipment is very lacking. In more lectures, teachers draw static schematic diagrams on the blackboard to explain. This kind of graphic demonstration cannot make students remember deeply. For example, the patent No. 201420510224.2 includes a main board, a trolley, a pulley, a slide bar and a support seat. The main board is the main part of the present utility model. There are sliding bars on the sides respectively, and two movable poles are arranged on the sliding poles, and a pulley is provided on the upper end of each pole. Although the structure of this patent is simple and reasonable to a certain extent, it cannot demonstrate the mechanical principles visually. It is not easy for students to understand, cannot stimulate learning interest, and affects the quality of teaching.

Utility model content

The purpose of this utility model is to provide a mechanics teaching demonstration device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a mechanical teaching demonstration device, including a base, the top left and right sides of the base are fixedly installed with support rods, and the inner side of the support rod is installed with a first Rotating rod, the left and right ends of the first rotating rod are respectively fixed with clamping plates and handles, the connection between the first rotating rod and the support rod is equipped with a first collar, and the right side of the first rotating rod The outer wall is threadedly connected with a threaded sleeve, the right side of the threaded sleeve is equipped with a connecting cylinder, the top of the first rotating rod is fixedly installed with a demonstration device, and the demonstration device includes a device shell, and the top of the device shell is fixed around the top A baffle is installed, and the upper surface of the housing of the device is provided with a first friction pad, a second friction pad and a glass fiber sheet sequentially from left to right, and the top of the first friction pad, the second friction pad and the glass fiber sheet All are provided with a slide block, and an identification card is installed at the center of the front outer wall of the slide block.

Preferably, a support seat is fixedly installed on the top of the slider, a cross bar is installed on the inner side of the support seat, a second rotating rod is installed on the front of the support seat, and the connection between the second rotating rod and the support seat A second collar is installed at the place, the left and right ends of the cross bar are fixedly installed with blocking blocks, the left and right sides of the outer wall of the cross bar are sleeved with sleeve plates, and the top of the sleeve plate is threadedly connected with bolts, The bottom end of the cover board is fixedly installed with a loading board.

Preferably, the outer wall of the cross bar is provided with scale lines.

Preferably, a gasket is provided on the left side of the threaded sleeve.

Preferably, a rubber pad is provided at the bottom of the base.

Compared with the prior art, the utility model has the beneficial effects that the mechanics teaching demonstration device places the sliders on the first friction pad, the second friction pad, Two friction pads and glass fiber sheets. Due to the inclination of the device shell, the slider slides on the first friction pad, the second friction pad and the glass fiber sheet. Observe that each slider slides on the first friction pad, the second friction pad and the glass fiber sheet. It can judge the friction force of the same slider on different surfaces, demonstrate the principle of mechanics more vividly and intuitively, make it easier for students to understand, and improve the quality of teaching.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the structural schematic diagram of demonstration device of the present utility model;

Fig. 3 is a schematic structural diagram of the slider of the present invention.

In the figure: 1. Base, 2. Support rod, 3. First rotating rod, 4. Clamping plate, 5. Handle, 6. First collar, 7. Thread sleeve, 8. Connecting cylinder, 9. Demonstration device , 901, device shell, 902, baffle plate, 903, first friction pad, 904, second friction pad, 905, glass fiber sheet, 906, slider, 907, identification card, 908, support seat, 909, cross bar , 910, the second rotating rod, 911, the second collar, 912, blocking block, 913, cover plate, 914, bolt, 915, loading plate, 916, scale mark, 10, gasket, 11, rubber pad.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-3, the utility model provides a technical solution: a mechanical teaching demonstration device, including a base 1, a support rod 2 is fixedly installed on the left and right sides of the top of the base 1, and the inner side of the support rod 2 is installed There is a first rotating rod 3, and the left and right ends of the first rotating rod 3 are respectively fixed with a clamping plate 4 and a handle 5. The clamping plate 4 prevents the separating of the clamping plate 4 and the support rod 2. Turn the handle 5 clockwise or counterclockwise, and the handle 5 Drive the first rotating rod 3 to rotate on the inner side of the support rod 2, the first collar 6 is installed at the joint between the first rotating rod 3 and the supporting rod 2, and the first collar 6 is convenient for the first rotating rod 3 and the support The role of rotation between the rods 2, the outer wall on the right side of the first rotating rod 3 is threadedly connected with a threaded sleeve 7, the right side of the threaded sleeve 7 is equipped with a connecting cylinder 8, and the top of the first rotating rod 3 is fixedly installed with a demonstration device 9, When the physics teacher makes a mechanics demonstration, he turns the connecting cylinder 8 counterclockwise, the connecting cylinder 8 drives the threaded sleeve 7 to rotate counterclockwise, and the handle 5 drives the first rotating rod 3 to rotate, and the first rotating rod 3 drives the demonstration device 9 to rotate, and the demonstration device 9 Tilting occurs, when the demonstration device 9 is tilted to a suitable angle, the connecting cylinder 8 is rotated clockwise, and the connecting cylinder 8 drives the threaded sleeve 7 to fix the adjusted inclination angle. Both are fixedly installed with baffles 902, and the upper surface of the device housing 901 is provided with a first friction pad 903, a second friction pad 904 and a glass fiber sheet 905 in sequence from left to right, and the friction coefficient of the second friction pad 904 is greater than that of the first friction pad. The coefficient of friction of the pad 903, the surface of the glass fiber sheet 905 is smooth, the friction coefficients of the first friction pad 903, the second friction pad 904 and the surface of the glass fiber sheet 905 are different, which is convenient for comparison, the first friction pad 903, the second friction pad 904 and the top of the glass fiber sheet 905 are provided with a slide block 906, the center of the front outer wall of the slide block 906 is equipped with an index card 907, the index card 907 classifies the slide block 906, and the top of the slide block 906 is fixedly equipped with a support seat 908, The inner side of the support base 908 is equipped with a cross bar 909, and the front of the support base 908 is equipped with a second rotating rod 910, an external force is applied to the cross bar 909, and the cross bar 909 drives the second rotating rod 910 to rotate on the inside of the support base 908. A second collar 911 is installed at the connection between the second rotating rod 910 and the supporting seat 908, and the second collar 911 plays a role in facilitating the rotation between the second rotating rod 910 and the supporting seat 908. The left and right ends of the cross bar 909 are A blocking block 912 is fixedly installed, and the left and right sides of the outer wall of the cross bar 909 are sleeved with sleeve plates 913. The block 912 prevents the separation of the sleeve plate 913 and the cross bar 909. The top of the sleeve plate 913 is threaded with a bolt 914, and the sleeve plate 913 A loading plate 915 is fixedly installed at the bottom of the bottom, and weights of different weights are placed on the loading plate 915. The heavy end of the weight is lowered, and the light end of the weight is raised, which more vividly demonstrates the principle of leverage. The outer wall of 909 is provided with scale line 916, and the left side of screw sleeve 7 is provided with spacer 10, and the bottom end of base 1 is provided with rubber pad 11, and rubber pad 11 is rubber Made of material.

In the physics class, when the physics teacher makes a mechanics demonstration, he turns the connecting cylinder 8 counterclockwise, the connecting cylinder 8 drives the threaded sleeve 7 to rotate counterclockwise, and the handle 5 drives the first rotating rod 3 to rotate, and the first rotating rod 3 drives the demonstration device 9 Rotate, the demonstration device 9 tilts, when the demonstration device 9 tilts to a suitable angle, turn the connecting cylinder 8 clockwise, the connecting cylinder 8 drives the threaded sleeve 7 to fix the adjusted tilt angle, and place the sliders 906 on the first The friction pad 903, the second friction pad 904 and the glass fiber sheet 905, due to the inclination of the device housing 901, the slider 906 slides on the first friction pad 903, the second friction pad 904 and the glass fiber sheet 905, observe each slider 906 In the sliding distance of the first friction pad 903, the second friction pad 904, and the glass fiber sheet 905, judge the friction force of the same slider 906 on different surfaces, and demonstrate the mechanics principle more vividly and intuitively, which is easier for students to understand , stimulate interest in learning and improve the quality of teaching.

In the description of the present utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", " The orientation or positional relationship indicated by "top", "inner", "front", "central", "both ends" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description , rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In this utility model, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation" and "rotation" should be understood in a broad sense, for example, it can be a fixed connection, It can also be a detachable connection, or integrated; it can be a mechanical connection, it can also be an electrical connection; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components Unless otherwise clearly defined, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (5)

1. a kind of mechanics teaching demonstration device, including pedestal（1）, it is characterised in that：The pedestal（1）The top left and right sides it is equal It is installed with support bar（2）, the support bar（2）Inner side the first bull stick is installed（3）, first bull stick（3）A left side Right two ends are installed with clamp respectively（4）And handle（5）, first bull stick（3）With support bar（2）Junction be provided with First collar（6）, first bull stick（3）Outer right wall be threaded with thread bush（7）, the thread bush（7）Right side Connecting cylinder is installed（8）, first bull stick（3）Top be installed with apparatus for demonstrating（9）, the apparatus for demonstrating（9）Bag Include crust of the device（901）, described device shell（901）Top surrounding be installed with baffle plate（902）, described device shell （901）Upper surface be sequentially provided with the first friction pad from left to right（903）, the second friction pad（904）And glass fiber sheets （905）, first friction pad（903）, the second friction pad（904）And glass fiber sheets（905）Top be equipped with sliding block （906）, the sliding block（906）Front outer wall center designation card is installed（907）.

2. a kind of mechanics teaching demonstration device according to claim 1, it is characterised in that：The sliding block（906）Top It is installed with support base（908）, the support base（908）Inner side cross bar is installed（909）, the support base（908）'s Front is provided with the second bull stick（910）, second bull stick（910）With support base（908）Junction the second collar is installed （911）, the cross bar（909）Left and right ends be installed with sprue（912）, the cross bar（909）Outer wall or so two Side is socketed with cage plate（913）, the cage plate（913）Top be threaded with bolt（914）, the cage plate（913）Bottom End is installed with support board（915）.

3. a kind of mechanics teaching demonstration device according to claim 2, it is characterised in that：The cross bar（909）Outer wall Provided with graduation mark（916）.

4. a kind of mechanics teaching demonstration device according to claim 1, it is characterised in that：The thread bush（7）Left side Provided with pad（10）.

5. a kind of mechanics teaching demonstration device according to claim 1, it is characterised in that：The pedestal（1）Bottom set There is rubber blanket（11）.