CN208422198U - A kind of synthesis of power and decomposition demonstrating instrument - Google Patents
A kind of synthesis of power and decomposition demonstrating instrument Download PDFInfo
- Publication number
- CN208422198U CN208422198U CN201721568267.6U CN201721568267U CN208422198U CN 208422198 U CN208422198 U CN 208422198U CN 201721568267 U CN201721568267 U CN 201721568267U CN 208422198 U CN208422198 U CN 208422198U
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- China
- Prior art keywords
- measuring scale
- dynamometer
- drag hook
- decomposition
- synthesis
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Abstract
The utility model provides synthesis and the decomposition demonstrating instrument of a kind of power, including bottom plate, first dynamometer, second dynamometer, first measuring scale, second measuring scale, cross bar, first adjusts bolt, second adjusts bolt, locating shaft and stretch cord, first measuring scale is connected by locating shaft and the second measuring scale, first measuring scale is connected by the first adjusting bolt with sliding rail and cross bar, second measuring scale is connected by the second adjusting spiral shell with sliding rail and cross bar, first dynamometer top and tail end are equipped with drag hook, top drag hook is connected to the intersection point of stretch cord and the second dynamometer, tail end drag hook is connected to the first measuring scale, second dynamometer connection type is similar, stretch cord one end is connected to locating shaft, the other end is connected to the intersection point of the first dynamometer and the second dynamometer, demonstrator provided by the utility model, the material of selection is light-weight, structure is skilful It is wonderful, it is dismounted easily, directly can verify and demonstrate the parallelogram rule of power.
Description
Technical field
The utility model belongs to a kind of demonstration instrument, and in particular to a kind of synthesis of power and decomposition demonstrating instrument.
Background technique
The synthesis and decomposition of power follow the parallelogram law of power.When two power synthesis, to indicate the line of the two power
Section is that adjacent side makees parallelogram, and the diagonal line of this parallelogram means that the size and Orientation of resultant force.About parallel four
The test method of side shape rule has the method for equal effect and balancing method.The method of equal effect is by two component collective effects in the same of object
Point makes object generate certain deformation or acceleration.On position when then acting solely on the effect of two component with a power,
The size and Orientation for adjusting the power, identical deformation or acceleration when making the generation of stress object with two component collective effects.Due to
The measurement of acceleration is more complicated, so that stress object is generated identical deformation frequently with component and resultant force, realizes being total to for two component
Same-action and resultant force independent role are equivalent.At this moment, a power equivalent with two component collective effects just represents the resultant force of two component.
Generally selecting rubber band is stress object, and rubber band one end is fixed, and draws rubber band simultaneously with two power F1, F2 at an angle to each other
The other end makes it generate certain elongation.Then rubber band is individually drawn with a power F, generates it and two pulling force collective effects
When identical elongation, then F is identical as the resultant force of two component, and F is exactly the resultant force measured.Then parallelogram rule is used again
Find out the resultant force of F1, F2.The resultant force for comparing F Yu F1, F2 sees whether the two size is equal, whether direction is identical, the pass of this method
Key is equivalent and error control, and realization is equivalent, is ensuring that the elongation of rubber band twice is equal, it is desirable that twice by rubber band
End be pulled to same position, control error, to accomplish to select identical weight beam as far as possible, can be good pair by two dynamometer hooks
It draws, selects the identical always a pair of number to read, dynamometer is parallel with the fixation plate face of rubber band, and when reading, sight will be carved with dynamometer
Plate face is spent, under conditions of being no more than elastic limit, as makes pulling force larger as possible, diagrammatic representation firmly is according to parallel four side
When shape rule picture seeks resultant force, it is larger that the selection of scale should be such that as far as possible picture obtains, and picture will strictly use drawing tool, same
In primary experiment, the site position after rubber band elongation is had to identical.Balancing method refers to three constant force while acting on object
Same point, when stress object remains static or when linear uniform motion state, these three dynamic balances, any two of them power
Resultant force and third power it is equal in magnitude, it is contrary.If the size of third power represents using any two power as component
The opposite direction of the resultant force size of the first two power, third power represents the direction of resultant force.In experiment, usually by three light rope sling one
It ties together, using node as stress object at end.Then one of them rope sling hangs up weight, is existed with two weight beams
Other two rope sling is drawn respectively along two directions at an angle to each other in perpendicular, when weight is static, three force balance.For convenience
Experiment and measurement, usually make stress particle remain stationary state, realize that the balance of three power, the key of this method are control stress
Particle remains static, and the measure for reducing error is identical as the method for equal effect.
The synthesis and decomposition of power are the focal points of Middle School Physics, and the personnel in the fields such as teaching aid are dedicated to developing always
Relevant demonstration instrument.Chinese patent literature CN102013195A discloses a kind of Vector modulation and decomposition analysis instrument, the invention
It is to be realized by being punched on batten and kerve, screw fixing or limit, although it can help student to learn visual in imagely
The synthesis and decomposition for understanding vector are practised, but it cannot change the size of each vector.Chinese patent literature CN201060577 is disclosed
A kind of synthesis of power and decomposition demonstrating instrument, are made of, its feature is in fixed support bracket, fixed pallet, left and right scale pan
The rotating disc that composite force direction is designed on plate is equipped with arc-shaped slide rail in the upper end of fixed pallet, passes through sliding sleeve on arc-shaped slide rail
Fixed upper pulling force meter, three ends of Y-stay are fixedly connected with the upper end of the gib head of tensiometer, left and right component ruler respectively,
Respectively by the fixed corresponding scale pan of bracing wire, bracing wire bypasses corresponding slewing rollers for the lower end of left component ruler and right component ruler,
Although the invention can change the size of each power by counterweight, it is unable to the angle of directed varying forces, and the structure of the device is more multiple
It is miscellaneous.The synthesis of existing power and decomposition demonstrating instrument exist using difficulty, are difficult to the problems such as dismantling.
Utility model content
It is inconvenient for use existing for the synthesis of power and decomposition demonstrating instrument, be difficult to the problems such as dismantling to solve in the prior art, this
Utility model provides synthesis and the decomposition demonstrating instrument of the new power of one kind.
To achieve the above object, the utility model uses following technical scheme:
A kind of synthesis of power and decomposition demonstrating instrument, it is characterised in that: including bottom plate, the first dynamometer, the second dynamometer,
One measuring scale, the second measuring scale, cross bar, first adjust bolt, the second adjusting bolt, locating shaft and stretch cord, the first measuring scale
It is connected by locating shaft and the second measuring scale, sliding rail is provided on cross bar, the first measuring scale adjusts bolt and cunning by first
Rail is connected with cross bar, and the second measuring scale is connected by the second adjusting bolt with sliding rail and cross bar, the first dynamometer and the second dynamometry
The top of meter and tail end are respectively equipped with drag hook, and the drag hook on two dynamometer tops is connected, and is commonly connected to one end of stretch cord,
The other end of stretch cord is connected to locating shaft, and the drag hook of the first dynamometer tail end is connected to by the location hole on the first measuring scale
The drag hook of first measuring scale, the second dynamometer tail end is connected to the second measuring scale by the location hole on the second measuring scale.
Preferably, first dynamometer and the second dynamometry are calculated as bar shaped box dynamometer.
Preferably, the range of the bar shaped box dynamometer is 0-10N.
It is further preferred that the range of the bar shaped box dynamometer is 0-5N.
Preferably, equidistant circular hole is provided on the measuring scale.
It is further preferred that the spacing is 1-4cm.
Preferably, the measuring scale is stainless steel or aluminium alloy ruler.
Preferably, the bottom plate is hard plastic board.
It is further preferred that the hard plastic board is PVC board.
In actual use, the angle between the first measuring scale and the second measuring scale can be adjusted and fixed by locating shaft
Size adjusts the distance on cross bar between two measuring scales by tightening and unscrewing two adjusting bolts, reaches the conjunction of demonstration power
At the purpose with decomposition.It should be noted that be, to control error, to accomplish to select identical dynamometer as far as possible, it can be by two dynamometers
Hook is good to drawing, selects number a pair identical always to read.
The beneficial effects of the utility model
1. demonstrator provided by the utility model, error is small, precision is quasi-；
2. demonstrator provided by the utility model is ingenious in design, compact-sized, detachably, convenient transportation, long service life；
3. demonstrator demonstrating effect provided by the utility model is obvious, demonstration is not limited by place, can also may be used in horizontal plane
It is demonstrated in vertical blackboard plane, is suitble to one and more people to demonstrate jointly, changing existing demonstrator can only horizontally or vertically demonstrate
Single-function；
4. the instrument can both demonstrate Vector modulation operation, resolution of vectors operation can also be demonstrated, and in calculating process, triangle
Shape rule covers all at one glance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, synthesis and the decomposition demonstrating instrument of a kind of power, including bottom plate 1, the first dynamometer 2, the second dynamometer 3,
First measuring scale 4, the second measuring scale 5, cross bar 6, first adjust bolt 7, second and adjust bolt 8, locating shaft 10 and stretch cord 11,
First measuring scale 4 is connected by locating shaft 10 with the second measuring scale 5, sliding rail 9 is provided on cross bar 6, the first measuring scale 4 passes through
First adjusting bolt 7 is connected with sliding rail 9 and cross bar 6, and the second measuring scale 5 adjusts bolt 8 and 6 phase of sliding rail 9 and cross bar by second
Even, 2 top of the first dynamometer is equipped with drag hook 12, and tail end is equipped with drag hook 14, and 3 top of the second dynamometer is equipped with drag hook 13, and tail end is set
There is drag hook 15, drag hook 12 is connected with drag hook 13, and 11 one end of stretch cord is connected to locating shaft 10, and the other end is connected to drag hook 12 and draws
Hook 13,2 tail end of the first dynamometer are connected in the location hole 16 of the first measuring scale 4 by drag hook 14, and 3 tail end of the second dynamometer is logical
It crosses drag hook 15 to be connected in the location hole 17 of the second measuring scale 5, dynamometry is calculated as bar shaped box dynamometer, and measurement range is 0-5N, surveys
The spacing of circular hole is 2cm on gage, and measuring scale is aluminum alloy material, and bottom plate material is PVC board.
When teaching demonstration, whole device can be placed on blank sheet of paper, stretch the intersection point of two dynamometers and stretch cord, it will
The direction of power and size are recorded on blank sheet of paper, and the direction and strength for changing stretching record again, simple and efficient to handle a, people
Demonstration can be completed.Whole device can also be disposed vertically, hang counterweight in the point of intersection of two dynamometers and stretch cord, increase
Subtract counterweight weight, different size of heavy force resolution can be demonstrated.
The embodiments of the present invention only introduce its specific embodiment, do not limit the protection scope thereof.The industry
Technical staff can make certain modifications under the inspiration of the present embodiment, therefore all done according to the utility model patent range
Equivalent change or modification belongs in the claimed range of the utility model patent right.
Claims (9)
1. synthesis and the decomposition demonstrating instrument of a kind of power, it is characterised in that: including bottom plate (1), the first dynamometer (2), the second dynamometry
It counts (3), the first measuring scale (4), the second measuring scale (5), cross bar (6), the first adjusting bolt (7), the second adjusting bolt (8), determine
Position axis (10) and stretch cord (11), the first measuring scale (4) are equipped with location hole (16), and the second measuring scale (5) is equipped with location hole
(17), the first measuring scale (4) is connected by locating shaft (10) with the second measuring scale (5), and sliding rail (9) are provided on cross bar (6),
First measuring scale (4) adjusts bolt (7) by first and is connected with the sliding rail (9) on cross bar (6), and the second measuring scale (5) passes through the
Two adjust bolt (8) is connected with the sliding rail (9) on cross bar (6), and the first dynamometer (2) top is equipped with the first drag hook (12), tail end
Equipped with the second drag hook (14), the second dynamometer (3) top is equipped with third drag hook (13), and tail end is equipped with the 4th drag hook (15), and first
Drag hook (12) is connected with third drag hook (13), and stretch cord (11) one end is connected to locating shaft (10), and the other end is commonly connected to
One drag hook (12) and third drag hook (13), the first dynamometer (2) tail end are connected to the first measuring scale (4) by the second drag hook (14)
Location hole (16) in, the second dynamometer (3) tail end is connected to the location holes of the second measuring scale (5) by the 4th drag hook (15)
(17) in.
2. synthesis and the decomposition demonstrating instrument of power according to claim 1, it is characterised in that: first dynamometer (2)
It is bar shaped box dynamometer with the second dynamometer (3).
3. synthesis and the decomposition demonstrating instrument of power according to claim 2, it is characterised in that: the amount of the bar shaped box dynamometer
Journey is 0-10N.
4. synthesis and the decomposition demonstrating instrument of power according to claim 2, it is characterised in that: the amount of the bar shaped box dynamometer
Journey is 0-5N.
5. synthesis and the decomposition demonstrating instrument of power according to claim 1, it is characterised in that: first measuring scale (4)
On location hole (16) and the second measuring scale (5) on location hole (17) be equidistant circular hole.
6. synthesis and the decomposition demonstrating instrument of power according to claim 5, it is characterised in that: the spacing is 1-4cm.
7. synthesis and the decomposition demonstrating instrument of power according to claim 1, it is characterised in that: first measuring scale (4)
It is stainless steel or aluminium alloy measuring scale with the second measuring scale (5).
8. synthesis and the decomposition demonstrating instrument of power according to claim 1, it is characterised in that: the bottom plate (1) is hard
Plastic plate.
9. synthesis and the decomposition demonstrating instrument of power according to claim 8, it is characterised in that: the hard plastic board is
PVC board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721568267.6U CN208422198U (en) | 2017-11-21 | 2017-11-21 | A kind of synthesis of power and decomposition demonstrating instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721568267.6U CN208422198U (en) | 2017-11-21 | 2017-11-21 | A kind of synthesis of power and decomposition demonstrating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208422198U true CN208422198U (en) | 2019-01-22 |
Family
ID=65128403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721568267.6U Expired - Fee Related CN208422198U (en) | 2017-11-21 | 2017-11-21 | A kind of synthesis of power and decomposition demonstrating instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208422198U (en) |
-
2017
- 2017-11-21 CN CN201721568267.6U patent/CN208422198U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 Termination date: 20211121 |