CN211375955U

CN211375955U - Balance scale teaching demonstration device

Info

Publication number: CN211375955U
Application number: CN202020402285.2U
Authority: CN
Inventors: 张建功; 杨志勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-08-28
Anticipated expiration: 2030-03-25

Abstract

The utility model discloses a balance ruler teaching presentation device relates to experimental teaching device technical field. The novel bearing device is characterized by comprising a base, a support frame is arranged on the base, a rotating shaft is arranged on one side of the support frame, a balance rod is rotatably connected to the rotating shaft, a fixing rod is fixedly connected to the other side of the support frame, a first sliding block is arranged on the balance rod, the first sliding block is distributed on two sides of the rotating shaft, a second sliding block is arranged on the fixing rod and corresponds to the first sliding block, a pulley is arranged on the second sliding block, a tension meter is arranged on the first sliding block, a string is arranged on the tension meter and is connected with the pulley, and a load carrying disc is arranged at the end of the string. The beneficial effects of the utility model reside in that: the experimental result can be more accurate.

Description

Balance scale teaching demonstration device

Technical Field

The utility model relates to an experimental teaching technical field specifically is a balance ruler teaching presentation device.

Background

The balance ruler is a secret for exploring the labor saving of the lever, and when a heavy object with the same weight is lifted, the relation between the force and the force arm is displayed by adjusting the position of a force application point and the weight of a hung hook code;

but all be the vertical setting of balancing pole in current teaching device, at the in-process of experiment, when balancing pole both sides were unbalance seriously, caused the balancing pole to damage easily, secondly the weight of tensiometer has influenced the experimental result, caused the experiment error great.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a balance ruler teaching presentation device can make the experimental result more accurate.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

a balance ruler teaching demonstration device comprises a base, wherein a support frame is arranged on the base, a rotating shaft is arranged on one side of the support frame, a balance rod is rotatably connected onto the rotating shaft, and a fixed rod is fixedly connected to the other side of the support frame;

the balance rod is provided with first sliding blocks, and the first sliding blocks are distributed on two sides of the rotating shaft;

a second sliding block is arranged on the fixed rod, corresponds to the first sliding block and is provided with a pulley;

the first sliding block is provided with a tension meter, the tension meter is provided with a thin rope, the thin rope is connected with the pulley, and the end part of the thin rope is provided with a load carrying disc.

An arc-shaped graduated scale is arranged on the support frame, and a pointer is arranged in the middle of the balancing rod.

Be equipped with buffer gear on the support frame, buffer gear includes the fixed block, the inside slide that is equipped with in fixed block both sides, be equipped with the spring in the slide, the spring tip is equipped with the extension rod, the extension rod tip is equipped with the swing piece.

And the balance rod and the fixed rod are respectively provided with a linear graduated scale, and the linear graduated scales correspond to each other.

And the balance rod and the fixed rod are respectively provided with a fastening bolt.

Contrast prior art, the beneficial effects of the utility model reside in that:

1. through adjusting the position of first slider on the balancing pole, the position of second slider on the dead lever is adjusted to the correspondence, make second slider and first slider position corresponding, the quality of heavy object in the load dish is readjusted, adjust balancing pole balance, it is how much to show the pulling force that comes from the heavy object through the tensiometer on the first slider, the distance before reunion first slider to the pivot, show the relation between exerting oneself and the arm of force, at the in-process of experiment, the weight of tensiometer is born by first slider, therefore the weight of tensiometer can not exert an influence to the experimental result, the accuracy of experimental result has been strengthened.

2. The arc-shaped graduated scale is arranged on the support frame, the pointer is arranged in the middle of the balance rod, whether the balance rod is in a parallel state or not can be accurately judged through the state of the arc-shaped graduated scale corresponding to the pointer, and the accuracy of an experimental result is further guaranteed.

3. Be equipped with buffer gear on the support frame, buffer gear includes the fixed block, the inside slide that is equipped with in fixed block both sides, be equipped with the spring in the slide, spring tip is equipped with the extension rod, extension rod end is equipped with the swinging block, and when the weight that adds in the balance rod both sides was unbalance seriously, random swing phenomenon can appear in the balance rod, perhaps appears the phenomenon of swinging by a wide margin, is unfavorable for going on smoothly of experiment, buffer gear can play the cushioning effect to the balance rod, and plays limiting displacement to the balance rod, has guaranteed going on smoothly of experimentation.

4. All be equipped with the straight line scale on balancing pole and the dead lever, the straight line scale is corresponding, when adjusting the position of first slider and second slider, can adjust corresponding position smoothly through the straight line scale, can further guarantee the quick and accurate going on of experiment.

5. All be equipped with fastening bolt on balancing pole and the dead lever, can play the fastening to first slider and second slider, prevent that the phenomenon of sliding from appearing in first slider and second slider, guaranteed the accuracy of experimental result.

Description of the drawings:

fig. 1 is a schematic front view of the present invention.

Fig. 2 is a schematic view of the relationship between the first slider and the balance bar when they are connected.

Fig. 3 is a front view of embodiment 2 of the present invention.

Fig. 4 is a front view of embodiment 3 of the present invention.

Reference numerals shown in the drawings:

11. a base; 12. a support frame; 13. a rotating shaft; 21. a balancing pole; 22. fixing the rod; 23. a first slider; 24. a second slider; 25. a pulley; 26. a tension meter; 27. a string; 28. a load tray; 31. an arc-shaped graduated scale; 32. a pointer; 4. a buffer mechanism; 41. a fixed block; 42. a slideway; 43. a spring; 44. an extension rod; 45. a swing block; 5. a linear scale; 6. and fastening the bolt.

Detailed Description

As shown in the drawings, the present invention will be described below with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

Example 1:

the utility model relates to a balance scale teaching demonstration device, which comprises a base, wherein a support frame is arranged on the base, a rotating shaft is arranged on one side of the support frame, the rotating shaft is positioned at the middle position of the support frame, a balance rod is rotatably connected on the rotating shaft, a fixed rod is fixedly connected on the other side of the support frame, the balance rod is positioned at the front end of the support frame, the fixed rod is positioned at the tail end of the support frame, the tail end of the fixed rod extends out of the base by 5CM, a first slider is arranged on the balance rod, two first sliders are arranged on the balance rod, the first sliders are connected with the balance rod in a sliding way, the first sliders are distributed on the two sides of the rotating shaft, a second slider is arranged on the fixed rod, the second slider corresponds to the first slider, the sliders are connected with the fixed rod in a sliding way, a pulley, the tension meter is a digital display tension meter, a thin rope is arranged on the tension meter and is in sliding connection with a pulley, a load disc is arranged at the end of the thin rope and is used for bearing weights for applying gravity or other weights, the position of a second sliding block on a fixed rod is correspondingly adjusted by adjusting the position of a first sliding block on a balance rod, the second sliding block corresponds to the position of the first sliding block, the balance rod is adjusted by adjusting the mass of the weights in the load disc, the tension from the weights is displayed by the tension meter on the first sliding block, the relationship between the applied force and the force arm is displayed by combining the distance from the first sliding block to a rotating shaft, and in the process of an experiment, the weight of the tension meter is borne by the first sliding block, so that the weight of the tension meter cannot influence an experiment result, and the accuracy of the experiment result is enhanced.

In order to further guarantee the accuracy of experimental result, be equipped with the arc scale on the support frame, the balancing pole middle part is equipped with the pointer, and through the state of the arc scale that the pointer corresponds, whether can accurately judge the balancing pole and be in parallel state, has further guaranteed the accuracy of experimental result.

Example 2:

the utility model relates to a balance ruler teaching demonstration device, which is based on the embodiment 1, in order to ensure the smooth proceeding of the experiment process, the supporting frame is provided with a buffer mechanism, the buffer mechanism comprises a fixed block, the inner parts of two sides of the fixed block are provided with slideways, a spring is arranged in the slideway, the end part of the spring is provided with an extension rod, the spring can buffer the extension rod, the end part of the extension rod is provided with a swinging block, when the swinging block contacts with the balancing pole, the swinging block rotates and contacts with the balancing pole in a matching way, when the weight applied to the two sides of the balancing pole is seriously unbalanced, the balancing pole can swing randomly, or the phenomenon of large amplitude swing is generated, the smooth experiment is not facilitated, the buffer mechanism can play a buffer role in the balancing pole and play a limiting role in the balancing pole, and the smooth experiment process is guaranteed.

Example 3:

a balance ruler teaching presentation device, on embodiment 1's basis, in order to further guarantee to test quick and accurate going on, all be equipped with the straight line scale on balancing pole and the dead lever, the straight line scale is corresponding, when adjusting the position of first slider and second slider, can adjust corresponding position smoothly through the straight line scale, can further guarantee to test quick and accurate going on.

In order to guarantee the accuracy of the experimental result, the balance bar and the fixed bar are respectively provided with a fastening bolt, so that the first sliding block and the second sliding block can be fastened, the sliding phenomenon of the first sliding block and the second sliding block is prevented, and the accuracy of the experimental result is guaranteed.

Claims

1. The utility model provides a balance ruler teaching presentation device, includes the base, be equipped with the support frame on the base, its characterized in that: a rotating shaft is arranged on one side of the supporting frame, a balancing rod is rotatably connected to the rotating shaft, and a fixing rod is fixedly connected to the other side of the supporting frame;

2. The balance bar teaching demonstration device of claim 1 wherein: an arc-shaped graduated scale is arranged on the support frame, and a pointer is arranged in the middle of the balancing rod.

3. The balance bar teaching demonstration device of claim 1 wherein: be equipped with buffer gear on the support frame, buffer gear includes the fixed block, the inside slide that is equipped with in fixed block both sides, be equipped with the spring in the slide, the spring tip is equipped with the extension rod, the extension rod tip is equipped with the swing piece.

4. The balance bar teaching demonstration device of claim 1 wherein: and the balance rod and the fixed rod are respectively provided with a linear graduated scale, and the linear graduated scales correspond to each other.

5. The balance bar teaching demonstration device of claim 1 wherein: and the balance rod and the fixed rod are respectively provided with a fastening bolt.