CN210983945U

CN210983945U - Experimental device for middle school physics lever experiments

Info

Publication number: CN210983945U
Application number: CN201921996403.0U
Authority: CN
Inventors: 侯骁峻
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-07-10
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses an experimental apparatus for middle school physics lever experiments, concretely relates to experimental apparatus field, the on-line screen storage device comprises a base, the top fixed mounting of base has the support frame, the support frame sets up with the base is perpendicular, the outside cover of support frame is equipped with the arm of force, the both ends bottom fixed mounting of the arm of force has the couple, the top of support frame is equipped with the U-shaped pipe, one side bottom couple fixedly connected with stay cord of department of the arm of force, the top fixed mounting of base has the fixed pulley, the fixed pulley is located the below of the arm of force and stay cord junction, the periphery side of fixed pulley is located to the stay cord rich, the top fixed mounting of base has the spring dynamometer, the spring dynamometer is located one side that the support frame. The utility model discloses a set up stay cord, fixed pulley and spring dynamometer, the three mutually supports, quantifies experimental phenomenon and result, is favorable to having improved student's learning efficiency.

Description

Experimental device for middle school physics lever experiments

Technical Field

The utility model belongs to the technical field of experimental apparatus, more specifically say, the utility model relates to an experimental apparatus is used in middle school physics lever experiment.

Background

In the middle school physics learning process, a class needs to explore the lever principle, and although the lever principle is simple and easy to understand, students can deepen understanding and memory by manually carrying out experiments by experimental equipment.

But current lever experimental apparatus still has more shortcoming when the in-service use, and experimental device is comparatively simple like learning in the school, can not audio-visually carry out the quantization with experimental phenomenon and result, hardly lets the student understand the experiment principle from the experimentation.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's above-mentioned defect, the embodiment of the utility model provides an experimental apparatus is used in middle school physics lever experiment, through setting up stay cord, fixed pulley and spring dynamometer, mutually support through the three, quantize experiment phenomenon and result, is favorable to having improved student's learning efficiency to solve the problem of proposing in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the experimental device for the middle school physics lever experiment comprises a base, wherein a support frame is fixedly arranged at the top of the base and is perpendicular to the base, a force arm is sleeved outside the support frame, hooks are fixedly arranged at the bottoms of two ends of the force arm, and a U-shaped pipe is arranged at the top of the support frame;

a pull rope is fixedly connected to a hook at the bottom of one side of the force arm, a fixed pulley is fixedly mounted at the top of the base, the fixed pulley is located below the joint of the force arm and the pull rope, the pull rope is wound on the outer peripheral side of the fixed pulley, a spring dynamometer is fixedly mounted at the top of the base, the spring dynamometer is located on one side of the fixed pulley, which is far away from the supporting frame, one end of the pull rope, which is far away from the force arm, is fixedly connected with the spring dynamometer, and a weight is hooked at a hook at the end part of the;

the utility model discloses a quick-witted support, including support frame, U-shaped pipe, dead lever, fixing rod and fixing rod, the top movable mounting of support frame has the loose axle, the periphery side and the U-shaped pipe fixed connection of loose axle, the top fixed mounting of the arm of force has two sets of dead levers, the dead lever sets up with the arm of force is perpendicular, the dead lever is kept away from the one end of the arm of force and the bottom contact of U-shaped pipe, be provided with horizontal sign on the both ends pole wall of U-shaped pipe, the inside of U-shaped pipe.

In a preferred embodiment, a first through hole is formed through the front side surface of the force arm, a second through hole is formed through the top of the force arm, and the support frame is movably sleeved in the second through hole.

In a preferred embodiment, a plurality of arc-shaped clamping grooves are formed in the top hole wall of the first through hole, and the plurality of arc-shaped clamping grooves are uniformly distributed.

In a preferred embodiment, the inside fixed through-mounting of support frame has the pivot, the pivot activity is located in the first through-hole and with the contact of arc draw-in groove, just the both ends of pivot all extend to outside the both sides of the arm of force, the equal fixed mounting in both ends of pivot has spacing dish.

In a preferred embodiment, the locating slot has been seted up on the pole wall of pivot, the inside activity of locating slot is equipped with the spacer pin, the bottom fixed mounting of spacer pin has the spring, the one end that the spacer pin was kept away from to the spring and the tank bottom fixed connection of locating slot, the top of spacer pin is spherical structure, just the top and the arc draw-in groove movable contact of spacer pin.

In a preferred embodiment, a pressing rod is fixedly installed on one side of the limiting pin close to the limiting disc, and the pressing rod penetrates through the limiting disc and extends out of the limiting disc.

In a preferred embodiment, a strip-shaped hole is formed in the outer surface of the limiting disc in a penetrating mode, and the pressing rod is movably arranged in the strip-shaped hole.

In a preferred embodiment, a weight box is arranged inside one side of the base, which is far away from the spring dynamometer, and the weight box is connected with the base in a sliding mode.

The utility model discloses a technological effect and advantage:

1. the utility model discloses a set up stay cord, fixed pulley and spring dynamometer, the weight that the left end arm of force was hung takes the power arm to incline to the left to stimulate the stay cord, the stay cord changes the trend through the fixed pulley, on transmitting the gravity of weight to the spring dynamometer, the spring dynamometer receives the pulling force, makes the scale change, the student can observe the experimental phenomenon from the registration of spring dynamometer, through the mutual cooperation of three, quantify experimental phenomenon and result, compare with prior art, there is the progress that improves student's learning efficiency;

2. the utility model discloses a set up U-shaped pipe and horizontal sign, the inside of U-shaped pipe is full of red liquid, whether the visual observation device of being convenient for student is leveled, if the liquid level of red liquid is level with horizontal sign looks, then the device is leveled, otherwise the U-shaped pipe inclines, then is not leveled, avoided the device because do not level and influence the emergence of experimental result phenomenon, compare with prior art, there is the progress that improves the experimental result accuracy;

3. the utility model discloses a set up the bar hole, the spacer pin, the depression bar, constant head tank and spring, the depression bar is moved in the pressure, make the depression bar slide along the bar hole, and drive spacer pin compression spring, when the spacer pin enters into the constant head tank completely, spacer pin and arc draw-in groove separation, remove the arm of force about, make another arc draw-in groove be located the spacer pin directly over, loosen the depression bar, the spacer pin is fixed with arc draw-in groove block contact under the spring action of spring, compared with the prior art, and has a simple structure, high durability and convenient operation, the progress of the high device practicality greatly.

Drawings

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

FIG. 2 is a side view of the structure of the present invention;

FIG. 3 is a schematic view of the force arm of the present invention;

FIG. 4 is a schematic view of the force arm and the support frame of the present invention;

fig. 5 is an enlarged schematic view of the structure at a in fig. 2 according to the present invention.

The reference signs are: the weight measuring device comprises a base 1, a weight box 11, a supporting frame 2, a force arm 3, a first through hole 31, an arc-shaped clamping groove 311, a second through hole 32, a fixed rod 33, a U-shaped tube 4, a horizontal mark 41, a movable shaft 42, a pull rope 5, a fixed pulley 51, a spring dynamometer 52, a rotating shaft 6, a limiting disc 61, a strip-shaped hole 611, a limiting pin 62, a pressure lever 621, a positioning groove 63 and a spring 64.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model relates to an experimental apparatus for middle school physics lever experiments, can include base 1, base 1's top fixed mounting has support frame 2, support frame 2 sets up with base 1 is perpendicular, the outside cover of support frame 2 is equipped with the arm of force 3, the both ends bottom fixed mounting of the arm of force 3 has the couple, the top of support frame 2 is equipped with U-shaped pipe 4.

Referring to the attached drawings 1-5 of the specification, in the experimental apparatus for lever experiments in middle school physics according to the embodiment, a pull rope 5 is fixedly connected to a hook at the bottom of one side of a force arm 3, a fixed pulley 51 is fixedly installed at the top of a base 1, the fixed pulley 51 is located below the joint of the force arm 3 and the pull rope 5, the pull rope 5 is wound on the outer peripheral side of the fixed pulley 51, a spring dynamometer 52 is fixedly installed at the top of the base 1, the spring dynamometer 52 is located on one side of the fixed pulley 51 far away from a support frame 2, one end of the pull rope 5 far away from the force arm 3 is fixedly connected with the spring dynamometer 52, and a weight is hooked at a hook at the end of the force arm 3.

Further, the top movable mounting of support frame 2 has loose axle 42, the periphery side and the U-shaped pipe 4 fixed connection of loose axle 42, the top fixed mounting of arm of force 3 has two sets of dead levers 33, dead lever 33 sets up with arm of force 3 is perpendicular, the dead lever 33 is kept away from the one end of arm of force 3 and the bottom contact of U-shaped pipe 4, be provided with horizontal sign 41 on the both ends pole wall of U-shaped pipe 4, the inside of U-shaped pipe 4 is full of red liquid, just the liquid level and the horizontal sign 41 looks parallel and level of red liquid.

The implementation scenario is specifically as follows: in practical use, when in experiment, the force arm 3 is installed on the support frame 2, the spring dynamometer 52 is connected with the hook at the right end of the force arm 3 through the pull rope 5, the weight is hung on the hook at the left end of the force arm 3, the weight is taken out from the weight box 11 and hung on the hook according to the required number of the weight, the change of the spring dynamometer 52 is observed, the experiment of lever balance can be verified through the comparison of the added value of the weight and the value of the spring dynamometer 52, through arranging the pull rope 5, the fixed pulley 51 and the spring dynamometer 52, when in experiment, the gravity of the weight hung on the force arm 3 at the left end drives the power arm 3 to incline to the left, thereby pulling the pull rope 5, the trend of the pull rope 5 is changed through the fixed pulley 51, the pull rope 5 is parallel to the spring dynamometer 52, the pull rope 5 transmits the gravity of the dynamometer to the spring dynamometer 52, the spring dynamometer 52 is subjected to, the students can observe the data from the readings of the spring dynamometer 52, and through the cooperation of the three, the experimental phenomenon and the result are quantized, the learning efficiency of students is improved, and by arranging the U-shaped pipe 4 and the horizontal mark 41, before the experiment, students need to carry out leveling and correcting operation on the device, the U-shaped pipe 4 is filled with red liquid, so that the students can visually observe whether the device is leveled or not, if the liquid level of the red liquid is level with the level mark 41, the device is leveled, otherwise, the U-shaped pipe 4 is not leveled when being inclined, thereby reducing the phenomenon that the experimental result is influenced because the device is not leveled, being beneficial to improving the accuracy of the experimental result, this embodiment has specifically solved the problem that exists among the prior art can not audio-visually quantify experimental phenomenon and result, student's learning effect is low.

Furthermore, the front side of the force arm 3 is provided with a first through hole 31 in a penetrating manner, the top of the force arm 3 is provided with a second through hole 32 in a penetrating manner, and the support frame 2 is movably sleeved in the second through hole 32, so that the force arm 3 can be conveniently adjusted.

Further, a plurality of arc-shaped clamping grooves 311 are formed in the hole wall of the top of the first through hole 31, the arc-shaped clamping grooves 311 are uniformly distributed, and the adjusting range of the force arm 3 is enlarged.

Further, the inside fixed penetration of support frame 2 installs pivot 6, the activity of pivot 6 is located in first through-hole 31 and is contacted with arc draw-in groove 311, just outside the both ends of pivot 6 all extended to the both sides of the arm of force 3, the equal fixed mounting in both ends of pivot 6 has spacing dish 61, avoids the arm of force 3 slippage in pivot 6.

Further, constant head tank 63 has been seted up on the pole wall of pivot 6, the inside activity of constant head tank 63 is equipped with spacer pin 62, the bottom fixed mounting of spacer pin 62 has spring 64, the one end that spacer pin 62 was kept away from to spring 64 and the tank bottom fixed connection of constant head tank 63, the top of spacer pin 62 is spherical structure, just the top and the arc draw-in groove 311 swing joint of spacer pin 62.

Further, one side fixed mounting that the spacer pin 62 is close to the spacing dish 61 has a depression bar 621, the depression bar 621 runs through the spacing dish 61 and extends to outside the spacing dish 61, is convenient for drive the spacer pin 62 compression spring 64, adjusts the distance between the arm of force 3 both sides.

Further, the outer surface of the limiting disc 61 is provided with a strip-shaped hole 611 in a penetrating manner, and the pressing rod 621 is movably arranged in the strip-shaped hole 611, so that the pressing rod 621 can be pressed conveniently, and the operation is convenient.

Further, base 1 keeps away from the inside weight box 11 that is equipped with in one side of spring dynamometer 52, weight box 11 and base 1 sliding connection are convenient for deposit the weight, are favorable to prolonging the life of weight.

The implementation scenario is specifically as follows: in practical use, by arranging the first through hole 31 and the second through hole 32, the distance between the left side and the right side of the force arm 3 is adjusted when a student performs an experiment, the comprehensive experiment is performed to verify the lever principle, by arranging the arc-shaped clamping groove 311, when the distance between the two sides of the force arm 3 is adjusted, the force arm 3 and the rotating shaft 6 are conveniently clamped and fixed (namely, the force arm 3 is hung on the shaft wall of the rotating shaft 6 under the action of gravity), by arranging the rotating shaft 6 and the limiting disc 61, the force arm 3 is suspended and supported, the force arm 3 is prevented from slipping from the support frame 2, by arranging the strip-shaped hole 611, the limiting pin 62, the pressure rod 621, the positioning groove 63 and the spring 64, when the distance between the two sides of the force arm 3 needs to be adjusted, the pressure rod 621 is pressed, the pressure rod 621 slides along the strip-shaped hole 611, and drives the limiting pin 62 to compress the spring 64, when the limiting pin 62 completely enters the positioning, remove the arm of force 3 about, make another arc draw-in groove 311 be located spacer pin 62 directly over, loosen depression bar 621, spacer pin 62 is fixed with arc draw-in groove 311 block contact under spring 64's elastic force effect, and the contact surface between the two is convex contact surface, has consequently avoided spacer pin 62 to interfere the rotation of the arm of force 3, simple structure, and convenient operation has improved the practicality of device greatly, and this embodiment has specifically solved the problem of the inconvenient regulation length of experimental apparatus who exists among the prior art.

The spring dynamometer 52 is model number SGNK-50 and is sold by shanghai cast balance electronics technology limited.

In summary, the following steps: the utility model discloses a set up stay cord 5, fixed pulley 51 and spring dynamometer 52, when carrying out the experiment, the weight gravity that the arm of force 3 of left end was hung drives power arm 3 and inclines to the left side to stimulate stay cord 5, stay cord 5 changes the trend through fixed pulley 51, on transferring the gravity of weight to spring dynamometer 52, spring dynamometer 52 receives the pulling force, make the scale change, the student can observe the realization phenomenon from the registration of spring dynamometer 52, through the cooperation between the three, quantify experiment phenomenon and result, be favorable to improving student's learning efficiency; still through setting up U-shaped pipe 4 and horizontal sign 41, the inside of U-shaped pipe 4 is full of red liquid, whether the audio-visual observation device of student is leveled, if the liquid level of red liquid is parallel and level with horizontal sign 41 mutually, then the device is leveled, otherwise U-shaped pipe 4 inclines, then is not leveled, thereby avoided the device because influence the emergence of experimental result phenomenon of not leveling, be favorable to improving the accuracy of experimental result.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an experimental apparatus for middle school physics lever experiment, includes base (1), its characterized in that: the top of the base (1) is fixedly provided with a support frame (2), the support frame (2) is perpendicular to the base (1), a force arm (3) is sleeved outside the support frame (2), hooks are fixedly arranged at the bottoms of two ends of the force arm (3), and a U-shaped pipe (4) is arranged at the top of the support frame (2);

a pull rope (5) is fixedly connected to a hook at the bottom of one side of the force arm (3), a fixed pulley (51) is fixedly mounted at the top of the base (1), the fixed pulley (51) is located below the joint of the force arm (3) and the pull rope (5), the pull rope (5) is wound on the outer peripheral side of the fixed pulley (51), a spring dynamometer (52) is fixedly mounted at the top of the base (1), the spring dynamometer (52) is located on one side of the fixed pulley (51) far away from the support frame (2), one end of the pull rope (5) far away from the force arm (3) is fixedly connected with the spring dynamometer (52), and a weight is hooked at a hook at the end of the force arm (3) far away from the pull rope (5);

the top movable mounting of support frame (2) has loose axle (42), the periphery side and the U-shaped pipe (4) fixed connection of loose axle (42), the top fixed mounting of arm of force (3) has two sets of dead levers (33), dead lever (33) set up with arm of force (3) perpendicularly, the one end of arm of force (3) and the bottom contact of U-shaped pipe (4) are kept away from in dead lever (33), be provided with horizontal sign (41) on the both ends pole wall of U-shaped pipe (4), the inside of U-shaped pipe (4) is full of red liquid, just the liquid level and the horizontal sign (41) looks parallel and level of red liquid.

2. The experimental device for the middle school physics lever experiment according to claim 1, characterized in that: the front side surface of the force arm (3) penetrates through and is provided with a first through hole (31), the top of the force arm (3) penetrates through and is provided with a second through hole (32), and the support frame (2) is movably sleeved in the second through hole (32).

3. The experimental device for the middle school physics lever experiment according to claim 2, characterized in that: a plurality of arc-shaped clamping grooves (311) are formed in the hole wall of the top of the first through hole (31), and the arc-shaped clamping grooves (311) are evenly distributed.

4. The experimental device for the middle school physics lever experiment according to claim 3, characterized in that: the inside fixed running-through of support frame (2) installs pivot (6), pivot (6) activity is located in first through-hole (31) and contact with arc draw-in groove (311), just the both ends of pivot (6) all extend to outside the both sides of the arm of force (3), the equal fixed mounting in both ends of pivot (6) has spacing dish (61).

5. The experimental device for the middle school physics lever experiment according to claim 4, characterized in that: seted up constant head tank (63) on the pole wall of pivot (6), the inside activity of constant head tank (63) is equipped with spacer pin (62), the bottom fixed mounting of spacer pin (62) has spring (64), the one end that spacer pin (62) were kept away from in spring (64) and the tank bottom fixed connection of constant head tank (63), the top of spacer pin (62) is spherical structure, just the top and arc draw-in groove (311) movable contact of spacer pin (62).

6. The experimental device for the middle school physics lever experiment according to claim 5, characterized in that: limiting pin (62) are close to one side fixed mounting of spacing dish (61) have depression bar (621), depression bar (621) run through spacing dish (61) and extend to outside spacing dish (61).

7. The experimental device for the middle school physics lever experiment according to claim 6, characterized in that: a strip-shaped hole (611) is formed in the outer surface of the limiting disc (61) in a penetrating mode, and the pressing rod (621) is movably arranged in the strip-shaped hole (611).

8. The experimental device for the middle school physics lever experiment according to claim 1, characterized in that: the base (1) is kept away from inside weight box (11) that is equipped with in one side of spring dynamometer (52), weight box (11) and base (1) sliding connection.