CN214253588U - Junior middle school physics buoyancy experiment demonstration device - Google Patents

Abstract

The application discloses junior middle school physics buoyancy experiment presentation device, including placing the frame, adjusting structure, auxiliary structure and fixed knot structure, it is provided with the dynamometer to place frame inside. Through adjusting screw and the cooperation of adjusting sleeve pole, make the height-adjustable who places the frame, the inconvenient problem of adjusting of current presentation device has been solved, make things convenient for the student to watch the experimentation, and through gag lever post and the cooperation of spacing sleeve pole, when avoiding adjusting screw to shift out the adjusting sleeve pole, it is more stable to make the frame of placing move when adjusting, through connecting screw and screw hole cooperation, can drive the movable plate and reciprocate, and through slider and spout cooperation, it is more stable to make the movable plate move down, thereby can drive in the stable immersion liquid of object, moreover, the steam generator is simple in structure, the practicality of placing the frame is improved, make the dynamometer place more stable when using, thereby it is more stable when making the object remove, improved and placed the frame suitability.

Description

Junior middle school physics buoyancy experiment demonstration device

Technical Field

The application relates to a demonstration device, in particular to a junior middle school physics buoyancy experiment demonstration device.

Background

The buoyancy is the action force of the object immersed in the fluid and supported upwards by the fluid, and the buoyancy of the object in the liquid is only related to the volume of the object immersed in the liquid and the density of the liquid, so that the buoyancy experiment can be carried out in physics in order to facilitate students to more vividly know the buoyancy.

The mr need place the object of different volumes and weight in the graduated flask that is equipped with water when demonstrating buoyancy experiment, but because traditional presentation device's height generally all is fixed, can't adjust according to the height of test bench, can lead to the process of the unable comprehensive object atress of observing of partial student, has reduced presentation device's suitability.

And current presentation device is more stable when entrying for the object, all moves down through supplementary decline structure drive object, but its auxiliary structure is comparatively supplementary loaded down with trivial details, has reduced presentation device's practicality, and because unable split between traditional presentation device's spring dynamometer and the movable plate, can't change different spring dynamometers according to object weight. Therefore, a junior middle school physics buoyancy experiment demonstration device is proposed to the above-mentioned problem.

Disclosure of Invention

A junior middle school physics buoyancy experiment demonstration device comprises a placing frame, an adjusting structure, an auxiliary structure and a fixing structure, wherein a dynamometer is arranged in the placing frame;

the adjusting structure comprises adjusting screws, the bottom end of the placing frame is obliquely and symmetrically fixed with the adjusting screws, each adjusting screw is sleeved with an adjusting loop bar through a thread groove, the two adjusting loop bars are connected with the base through bearings, a protective cover is fixed on the base outside the adjusting loop bars, driven wheels are fixed on the adjusting loop bars inside the protective cover, and the two driven wheels are connected through a belt;

the auxiliary structure comprises a movable plate, the movable plate is arranged at the top end inside the placing frame, sliding blocks are fixed at two ends of the movable plate, sliding grooves matched with the sliding blocks are formed in two sides inside the placing frame, a connecting screw rod is connected to the middle position of the top end of the movable plate through a bearing and is connected with the top end of the placing frame through a crank, and a threaded hole is fixed at one end, extending to the upper side of the placing frame, of the connecting screw rod;

fixed knot constructs including fixed depression bar, movable plate bottom intermediate position department is fixed with solid fixed ring, and the inside articulated arc peg of solid fixed ring, arc peg bottom mounting is on the dynamometer top, the solid fixed ring on arc peg top is inside to be provided with fixed depression bar, fixed depression bar top intermediate position department is fixed with the removal loop bar, and removes the inside sliding connection of loop bar and have the dead lever, the dead lever top is fixed inside solid fixed ring, it is equipped with the spring to remove loop bar and dead lever outside cover, and the upper and lower end of spring is fixed at solid fixed ring and fixed depression bar.

Further, the movable plate bottom end of dynamometer rear side is fixed with the limiting plate, the limiting plate sets up to "U" shape with dynamometer complex, the limiting plate height is less than the height of dynamometer.

Furthermore, the top end of the protective cover is provided with a through hole matched with the adjusting loop bar, and a knob is fixed on the adjusting loop bar on the right side of the front side.

Furthermore, the top end of the protective cover is obliquely and symmetrically fixed with a limiting rod, a limiting sleeve rod is connected inside the limiting rod in a sliding mode, and the top end of the limiting sleeve rod is fixed at the bottom end of the placement frame.

Furthermore, the heights of the sliding groove and the crank are equal to one half of the height of the placing frame, and the width of the moving plate is smaller than the width of the placing frame.

Furthermore, gu fixed ring front side division be equipped with arc peg complex fluting, the arc peg sets up to with fixed ring complex arc.

Furthermore, the fixed compression bars are all set to be U-shaped, the width of the fixed compression bars is larger than that of the arc-shaped hanging bars, and the height of the fixed compression bars is smaller than the diameter height of the inner ring of the fixed ring.

Furthermore, the fixing rod is arranged in an inverted T shape, and the width between the fixing pressure rod and the inner ring of the fixing ring is larger than the wall thickness and height of the arc-shaped hanging rod.

Furthermore, two between gag lever post and two regulation loop bars all along the diagonal symmetry setting of base, the gag lever post all sets up to "T" shape of invering.

Furthermore, the height of the limiting sleeve rod is equal to that of the adjusting sleeve rod, and the height of the limiting rod is smaller than that of the adjusting screw rod.

The beneficial effect of this application is: the application provides a junior middle school physics buoyancy experiment presentation device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic perspective view of an embodiment of the present application;

FIG. 2 is a schematic sectional front view of a base according to an embodiment of the present disclosure;

FIG. 3 is a schematic sectional front view of a portion of an embodiment of the present application;

FIG. 4 is a schematic top cross-sectional view of an embodiment of the present application;

FIG. 5 is a schematic side cross-sectional view of a portion of one embodiment of the present application;

fig. 6 is an enlarged schematic view of a structure at a in fig. 5 according to an embodiment of the present application.

In the figure: 1. placing frame, 2, dynamometer, 3, adjusting screw, 4, adjusting loop bar, 5, base, 6, protective cover, 7, driven wheel, 8, belt, 9, knob, 10, moving plate, 11, slider, 12, chute, 13, connecting screw, 14, crank, 15, threaded hole, 16, fixed ring, 17, arc hanging rod, 18, fixed compression bar, 19, moving loop bar, 20, fixed rod, 21, spring, 22, limiting plate, 23, limiting rod, 24, limiting loop bar.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1-6, a demonstration device for a physical buoyancy experiment in junior middle schools comprises a placing frame 1, an adjusting structure, an auxiliary structure and a fixing structure, wherein a dynamometer 2 is arranged in the placing frame 1;

the adjusting structure comprises adjusting screws 3, the bottom end of the placing frame 1 is obliquely and symmetrically fixed with the adjusting screws 3, each adjusting screw 3 is sleeved with an adjusting loop bar 4 through a thread groove, the two adjusting loop bars 4 are connected with a base 5 through bearings, a protective cover 6 is fixed on the base 5 outside the adjusting loop bars 4, driven wheels 7 are fixed on the adjusting loop bars 4 inside the protective cover 6, and the two driven wheels 7 are connected through a belt 8;

the auxiliary structure comprises a movable plate 10, the movable plate 10 is arranged at the top end inside the placing frame 1, sliding blocks 11 are fixed at two ends of the movable plate 10, sliding grooves 12 matched with the sliding blocks 11 are formed in two sides inside the placing frame 1, a connecting screw 13 is connected to the middle position of the top end of the movable plate 10 through a bearing, the connecting screw 13 is connected with the top end of the placing frame 1 through a crank 14, and a threaded hole 15 is fixed at one end, extending to the upper side of the placing frame 1, of the connecting screw 13;

fixed knot constructs including fixed depression bar 18, movable plate 10 bottom intermediate position department is fixed with solid fixed ring 16, and the inside articulated arc peg 17 of solid fixed ring 16, arc peg 17 bottom mounting is on 2 tops of dynamometer, the inside fixed ring 16 on arc peg 17 top is provided with fixed depression bar 18, fixed depression bar 18 top intermediate position department is fixed with removal loop bar 19, and remove the inside sliding connection of loop bar 19 and have dead lever 20, the fixed ring 20 top is fixed inside solid fixed ring 16, remove loop bar 19 and the cover of the 20 outside of dead lever and be equipped with spring 21, and the spring 21 upper and lower ends are fixed at solid fixed ring 16 and fixed depression bar 18.

A limiting plate 22 is fixed at the bottom end of the moving plate 10 at the rear side of the dynamometer 2, the limiting plate 22 is in a U shape matched with the dynamometer 2, the height of the limiting plate 22 is smaller than that of the dynamometer 2, and the dynamometer 2 is limited by the limiting plate 22, so that the dynamometer 2 is more stable after being installed, and the dynamometer 2 is prevented from shaking when being used; the top end of the protective cover 6 is provided with through holes matched with the adjusting loop bar 4, the knob 9 is fixed on the right adjusting loop bar 4 at the front side, and the adjusting loop bar 4 is screwed by the knob 9, so that the labor is saved; a limiting rod 23 is obliquely and symmetrically fixed at the top end of the protective cover 6, a limiting sleeve rod 24 is connected inside the limiting rod 23 in a sliding manner, and the top end of the limiting sleeve rod 24 is fixed at the bottom end of the placing frame 1; the heights of the sliding chute 12 and the crank 14 are both equal to one half of the height of the placing frame 1, and the width of the moving plate 10 is smaller than that of the placing frame 1; a notch matched with the arc-shaped hanging rod 17 is formed in the front side of the fixing ring 16, and the arc-shaped hanging rod 17 is arranged to be in an arc shape matched with the fixing ring 16, so that the arc-shaped hanging rod 17 can be conveniently hung on the fixing ring 16; the fixed compression bars 18 are all arranged in a U shape, the width of the fixed compression bars 18 is larger than that of the arc-shaped hanging bars 17, and the height of the fixed compression bars 18 is smaller than the diameter height of the inner ring of the fixed ring 16, so that the fixed compression bars 18 are conveniently extruded when the arc-shaped hanging bars 17 are hung inside the fixed ring 16; the fixing rod 20 is arranged in an inverted T shape, the width between the fixing pressure rod 18 and the inner ring of the fixing ring 16 is larger than the wall thickness height of the arc-shaped hanging rod 17, and the arc-shaped hanging rod 17 can be hung in the fixing ring 16 by extruding the fixing pressure rod 18; the two limiting rods 23 and the two adjusting sleeve rods 4 are symmetrically arranged along the diagonal line of the base 5, and the limiting sleeve rods 24 are arranged in an inverted T shape, so that the placing frame 1 is more stable in moving, and the limiting sleeve rods 24 are prevented from being separated from the limiting rods 23; the height of stop collar rod 24 equals the height of adjusting loop rod 4, and the height that highly is less than adjusting screw 3 of gag lever post 23, through gag lever post 23 and the cooperation of stop collar rod 24, carries on spacingly placing frame 1, avoids placing frame 1 and excessively moves when adjusting, causes adjusting screw 3 and the separation of adjusting loop rod 4, has improved the stability of placing when frame 1 uses simultaneously.

When the height adjusting device is used, when the height of a placing frame 1 needs to be adjusted, a knob 9 is rotated to drive an adjusting loop bar 4 on the front side to rotate, under the matching of threads, an adjusting screw rod 3 on the front side is driven to move, meanwhile, a driven wheel 7 fixed on the adjusting loop bar 4 is driven to rotate, under the action of a belt 8, a driven wheel 7 on the rear side is driven to rotate, so that the adjusting loop bar 4 on the rear side is driven to rotate simultaneously, the adjusting screw rod 3 on the rear side can be driven to move inside the adjusting loop bar 4 simultaneously, the height of the placing frame 1 can be adjusted, meanwhile, a limiting loop bar 24 is driven to move inside a limiting rod 23, when an experiment needs to be carried out, a measuring bucket filled with liquid is placed at the bottom end of the placing frame 1, then an object needing to be immersed is hung on a dynamometer 2, then a crank 14 is rotated, under the matching of a bearing, a connecting screw rod 13 is driven to rotate, so that under the matching of a threaded hole 15, the movable plate 10 is driven to move downwards, the sliding block 11 is driven to move in the sliding groove 12 at the same time, an object can be stably immersed in liquid in the measuring barrel, after an experiment is completed, the crank 14 is reversely rotated, the object can be directly driven to move upwards, when different dynamometers 2 need to be replaced, the dynamometer 2 is firstly pushed upwards, the arc-shaped hanging rod 17 is driven to extrude the fixed pressure rod 18, the fixed pressure rod 18 drives the movable sleeve rod 19 to move on the fixed rod 20 to compress the spring 21, the arc-shaped hanging rod 17 is simultaneously rotated, the arc-shaped hanging rod 17 is taken out from the fixed ring 16 through a groove, then the arc-shaped hanging rod 17 on a new dynamometer 2 is aligned with the clamping groove, then the arc-shaped hanging rod 17 is pushed, the arc-shaped hanging rod 17 extrudes the fixed pressure rod 18 from the side, the fixed pressure rod 18 is driven to compress the spring 21 to move upwards under the U-shaped design of the fixed pressure rod 18, and the arc-shaped hanging rod 17 is simultaneously rotated, after rotating arc peg 17 to fixed depression bar 18 bottom, loosen dynamometer 2 for dynamometer 2 block is placed inside limiting plate 22, and make arc peg 17 fix inside solid fixed ring 16 under the extrusion of the bottom of fixed depression bar 18.

The application has the advantages that:

1. the height of the placing frame 1 can be adjusted through the matching of the adjusting screw rod 3 and the adjusting loop bar 4, the problem that the existing demonstration device is inconvenient to adjust is solved, students can conveniently watch an experiment process, and the adjusting screw rod 3 is prevented from moving out of the adjusting loop bar 4 through the matching of the limiting rod 23 and the limiting loop bar 24, so that the placing frame 1 is more stable to move during adjustment;

2. the movable plate 10 is reasonable in structure, the movable plate 10 can be driven to move up and down through the matching of the connecting screw 13 and the threaded hole 15, the movable plate 10 can move down more stably through the matching of the sliding block 11 and the sliding groove 12, and therefore an object can be driven to be stably immersed in liquid, the structure is simple and convenient, and the practicability of the placing frame 1 is improved;

3. this application is rational in infrastructure, through solid fixed ring 16 and the cooperation of arc peg 17, the convenience is changed the 2 splits of dynamometer, through the cooperation of fixed depression bar 18 and limiting plate 22 for dynamometer 2 places more stably when using, thereby is more stable when making the object remove, has improved and has placed 1 suitability of frame.

Since the internal structure of the spring dynamometer is prior art, it is not described in this document.

It is well within the skill of those in the art to implement, without undue experimentation, the present application is not directed to software and process improvements, as they relate to circuits and electronic components and modules.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a junior middle school physics buoyancy experiment presentation device which characterized in that: the device comprises a placing frame (1), an adjusting structure, an auxiliary structure and a fixing structure, wherein a dynamometer (2) is arranged in the placing frame (1);

the adjusting structure comprises adjusting screws (3), the bottom end of the placing frame (1) is obliquely and symmetrically fixed with the adjusting screws (3), each adjusting screw (3) is sleeved with an adjusting loop bar (4) through a thread groove, the two adjusting loop bars (4) are connected with a base (5) through bearings, a protective cover (6) is fixed on the base (5) outside the adjusting loop bars (4), driven wheels (7) are fixed on the adjusting loop bars (4) inside the protective cover (6), and the two driven wheels (7) are connected through a belt (8);

the auxiliary structure comprises a movable plate (10), the movable plate (10) is arranged at the top end inside the placing frame (1), sliding blocks (11) are fixed at two ends of the movable plate (10), sliding grooves (12) matched with the sliding blocks (11) are formed in two sides inside the placing frame (1), a connecting screw rod (13) is connected to the middle position of the top end of the movable plate (10) through a bearing, the connecting screw rod (13) is connected with the top end of the placing frame (1) through a crank (14), and a threaded hole (15) is fixed at one end, extending to the upper side of the placing frame (1), of the connecting screw rod (13);

fixed knot constructs including fixed depression bar (18), movable plate (10) bottom intermediate position department is fixed with solid fixed ring (16), and solid fixed ring (16) inside has been articulated arc peg (17), arc peg (17) bottom mounting is on dynamometer (2) top, solid fixed ring (16) on arc peg (17) top are inside to be provided with fixed depression bar (18), solid fixed depression bar (18) top intermediate position department is fixed with and removes loop bar (19), and removes loop bar (19) inside sliding connection and have dead lever (20), dead lever (20) top is fixed inside solid fixed ring (16), it is equipped with spring (21) to remove loop bar (19) and dead lever (20) outside cover, and fixed ring (16) and fixed depression bar (18) are fixed at spring (21) upper and lower ends.

2. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: moving plate (10) bottom mounting limiting plate (22) of dynamometer (2) rear side, limiting plate (22) set up to "U" shape with dynamometer (2) complex, limiting plate (22) height is less than the height of dynamometer (2).

3. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: the top end of the protective cover (6) is provided with a through hole matched with the adjusting loop bar (4), and the front side of the protective cover is right, and a knob (9) is fixed on the adjusting loop bar (4).

4. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: the protective cover is characterized in that limiting rods (23) are obliquely and symmetrically fixed to the top end of the protective cover (6), limiting sleeve rods (24) are connected to the inner portions of the limiting rods (23) in a sliding mode, and the top ends of the limiting sleeve rods (24) are fixed to the bottom end of the placement frame (1).

5. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: the height of the sliding groove (12) and the height of the crank (14) are both equal to one half of the height of the placing frame (1), and the width of the moving plate (10) is smaller than the width of the placing frame (1).

6. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: the front side of the fixing ring (16) is provided with a groove matched with the arc hanging rod (17), and the arc hanging rod (17) is arranged into an arc matched with the fixing ring (16).

7. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: the fixed compression bars (18) are all set to be U-shaped, the width of the fixed compression bars (18) is larger than that of the arc-shaped hanging bars (17), and the height of the fixed compression bars (18) is smaller than the diameter height of the inner ring of the fixed ring (16).

8. The demonstration device for physical buoyancy experiment in junior middle school according to claim 1, wherein: the fixing rod (20) is arranged in an inverted T shape, and the width between the fixing pressure rod (18) and the inner ring of the fixing ring (16) is larger than the wall thickness and height of the arc-shaped hanging rod (17).

9. The demonstration device for physical buoyancy experiment in junior middle school according to claim 4, wherein: two between gag lever post (23) and two regulation loop bars (4) all set up along the diagonal symmetry of base (5), gag lever post (24) all set up to "T" shape of invering.

10. The demonstration device for physical buoyancy experiment in junior middle school according to claim 4, wherein: the height of the limiting sleeve rod (24) is equal to that of the adjusting sleeve rod (4), and the height of the limiting rod (23) is smaller than that of the adjusting screw rod (3).

Images