CN202584503U - Demonstration ruler for composing and decomposing two forces - Google Patents
Demonstration ruler for composing and decomposing two forces Download PDFInfo
- Publication number
- CN202584503U CN202584503U CN 201220269736 CN201220269736U CN202584503U CN 202584503 U CN202584503 U CN 202584503U CN 201220269736 CN201220269736 CN 201220269736 CN 201220269736 U CN201220269736 U CN 201220269736U CN 202584503 U CN202584503 U CN 202584503U
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- ruler
- crossfoot
- demonstration
- concerted effort
- radian chi
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Abstract
The utility model discloses a demonstration ruler for composing and decomposing two forces. The demonstration ruler comprises a straight ruler and a semi-circular radian ruler, wherein the semi-circular radian ruler is fixed at the left end of the straight ruler. The demonstration ruler is characterized in that the outer side of the semi-circular radian ruler is provided with casings of two flexible rulers, a strip-shaped hole is arranged along a central line of the straight ruler, a cross ruler is fixed on the straight ruler through a sliding shaft arranged in the strip-shaped hole, a central hole of the cross ruler is sleeved on the sliding shaft, the right end of the strip-shaped hole is provided with a resultant force adjustment fixing shaft, and the pulling-out ends of the two flexible rulers sequentially penetrate through gaps of a roller pair, respectively bypass two ends of the cross ruler and then bypass the resultant force adjustment fixing shaft to be connected integrally. The demonstration ruler for composing and decomposing the two forces is simple in structure, capable of clearly expressing a quadrilateral algorithm and transformation relation among a component force, a resultant force and an included angle and convenient to demonstrate and facilitates graph drawing on a blackboard.
Description
Technical field
The utility model relates to a kind of physics teaching apparatus, specifically a kind of synthetic and decomposition demonstration ruler of two power.
Background technology
In physics teaching, in the teaching that relates to power, must say the synthetic of power and decompose, say exactly with joint efforts and component and between operation rule.When the effect that acting in conjunction produced of several power replaced with a power, this power was just named and is made a concerted effort; These several power promptly are called component.The size and Orientation of known two component asks the computing of the size and Orientation of making a concerted effort to be called the synthetic of power; The size and Orientation of making a concerted effort of known two component asks the computing of the size and Orientation of two component to be called resolution of force.Power synthetic with decompose inverse operation each other, meet parallelogram law.The size of making a concerted effort becomes inverse correlation with the angle of two component, and promptly angle is big more, and it is more little to make a concerted effort, and when angle is 180 when spending, making a concerted effort is zero, and when angle was spent greater than 180, making a concerted effort was negative value.At present, many demenstration methods are arranged, adopt tautness meter or counterweight, stay cord to demonstrate mostly for the synthetic of power and decomposition; Be connected with tautness meter or counterweight through stay cord, also will stay cord turned to, its complex structure through deflection sheave; Lines are too bad; Demonstration is got up also inconvenient, can not clearly illustrate component, makes a concerted effort, the transformation relation between the angle, and demonstration is got up also inconvenient.
Summary of the invention
The purpose of the utility model be to provide a kind of simple in structure, can express quadrilateral algorithm and component thereof clearly, make a concerted effort, the transformation relation between the angle, and demonstration easily and two power of the figure of being convenient on blackboard, to draw synthetic with decompose demonstration ruler.
In order to reach above purpose; The technical scheme that the utility model adopted is: the synthetic and decomposition demonstration ruler of these two power, comprise ruler and semicircle radian chi, and the center of circle of semicircle radian chi is fixed on the left end of ruler; And the center line of semicircle radian chi and the central lines of ruler; It is characterized in that: be provided with the housing of two tape measures in the outside, the center of semicircle radian chi, be provided with bar hole along the center line of ruler, on ruler through be arranged on sliding axle in the bar hole fixing on crossfoot; The crossfoot center pit is enclosed within on the sliding axle; Be provided with at the right-hand member of bar hole and make a concerted effort to regulate stationary shaft, the end of pulling out of two tape measures passes the gap of pair roller successively, walks around two ends of crossfoot respectively, walks around to make a concerted effort to regulate stationary shaft and connect as one again.According to the synthetic parallelogram law that meets of power, so the point of crossing of crossfoot and ruler is in the Along ent of crossfoot all the time and the initiating terminal of ruler is regulated half position between the stationary shaft to making a concerted effort.
The utility model is also implemented through following measure: connect square plate on the straight flange edge of described semicircle radian chi, the housing of two tape measures is fixed on the square plate.
Described crossfoot is flat tubulose, and expansion plate is inserted at two ends, and expansion plate passes through bolt.When needs changed the length of crossfoot, the telescopic adjustment of the expansion plate that can pass through realized.
Described stationary shaft also can slide in bar hole, in order to regulate the size of making a concerted effort.
The beneficial effect of the utility model is: with at present the synthetic of power with decompose teaching in employed teaching aid compare; Simple in structure, can express quadrilateral algorithm and component thereof clearly, make a concerted effort, the transformation relation between the angle, and demonstration is convenient and be convenient to the figure that on blackboard, draws.
Description of drawings
Fig. 1 is the structure schematic top plan view of the utility model.
Fig. 2 is a conversion embodiment schematic top plan view of the utility model.
Among the figure: 1, ruler; 2, semicircle radian chi; 3, tape measure; 4, bar hole; 5, sliding axle; 6, crossfoot; 7, make a concerted effort to regulate stationary shaft; 8, pair roller; 9, square plate; 10, housing; 11, expansion plate; 12, bolt.
Embodiment
Make the utility model with reference to Fig. 1, Fig. 2.Synthetic and the decomposition demonstration ruler of these two power comprises ruler 1 and semicircle radian chi 2, and the center of circle of semicircle radian chi 2 is fixed on the left end of ruler 1; And the center line of semicircle radian chi 2 and the central lines of ruler 1 is characterized in that: be provided with the housing 10 of two tape measures 3 in the outside, the center of semicircle radian chi 2, be provided with bar hole 4 along the center line of ruler 1; On ruler 1, fix crossfoot 6 through the sliding axle 5 that is arranged in the bar hole 4; Crossfoot 6 center pits are enclosed within on the sliding axle 5, can rotate along sliding axle 5, can be through the move position that change crossfoot 6 and ruler 1 point of crossing of sliding axle 5 along bar hole 4; Be provided with at the right-hand member of bar hole 4 and make a concerted effort to regulate stationary shaft 7; The end of pulling out of two tape measures 3 passes the gap of pair roller 8 successively, walks around two ends of crossfoot 6 respectively, walks around to make a concerted effort to regulate stationary shaft 7 and connect as one again, and limits the initial point of component through pair roller 8; Rotation demonstration through crossfoot 6 under certain state of making a concerted effort, the variation relation of two component and angle.According to the synthetic parallelogram law that meets of power, so the point of crossing of crossfoot 6 and ruler 1 is in the Along ent of crossfoot 6 all the time and the initiating terminal of ruler 1 is regulated half position between the stationary shaft 7 to making a concerted effort.Regulate when making a concerted effort stationary shaft 7 fixing after, promptly fixed the size of making a concerted effort, the initiating terminal that sliding axle 5 is moved to ruler 1 is regulated half position between the stationary shaft 7 to making a concerted effort; And it is fixing; When crossfoot 6 and ruler 1 are vertical, the size that can read two component from two tape measures 3, and two component equate; The direction of two component is pointed to the end of crossfoot 6; The angle of two component can calculate from semicircle radian chi 2, and the distance of regulating stationary shaft 7 to making a concerted effort for the initiating terminal of ruler 1 with joint efforts of two component can be read through the data on the ruler 1; When changing two component, can realize through rotating crossfoot 6, as rotate counterclockwise 45 degree; A top component dwindles; A following component increases, and the angle of two component reduces, and is constant with joint efforts; The correlativity of its variation can qualitatively find out on scheming, and its variable can be read from ruler 1, two tape measures 3 and semicircle radian chi 2.
Improvement as the utility model: the housing 10 that connects 9, two tape measures 3 of square plate on the straight flange edge of described semicircle radian chi 2 is fixed on the square plate 9.
Described crossfoot 6 is flat tubulose, and expansion plate 11 is inserted at two ends, and expansion plate 11 is fixing through bolt 12.When needs changed the length of crossfoot 6, the telescopic adjustment of the expansion plate 11 that can pass through realized.When the timing of making a concerted effort, if 11 whiles of expansion plate, the equivalent at crossfoot 6 two ends are stretched out, can find out that the angle of two component increases, two component also increase simultaneously simultaneously, and the amount of its increase can be read on two tape measures 3 and semicircle radian chi 2; If define the extension elongation of two tape measures 3; Just the girth of parallelogram is a fixed value; When the expansion plate at crossfoot 6 two ends 11 simultaneously, when equivalent is stretched out, can drive and make a concerted effort to regulate stationary shaft 7 and inwardly slide, meanwhile; The initiating terminal that also sliding axle 5 is moved to ruler 1 is regulated half position between the stationary shaft 7 to making a concerted effort, can find out that component increases, angle increases, makes a concerted effort to diminish this moment; When regulating stationary shaft 7 when making a concerted effort and moving to the initiating terminal of ruler 1 with sliding axle 5, make a concerted effort to go to zero, two component increases, angles increase is 180 degree.
Claims (3)
1. two power synthesizes and the decomposition demonstration ruler; Comprise ruler (1) and semicircle radian chi (2); The center of circle of semicircle radian chi (2) is fixed on the left part of ruler (1); And the central lines of the center line of semicircle radian chi (2) and ruler (1); It is characterized in that: be provided with the housing (10) of two tape measures (3) in the outside, the center of semicircle radian chi (2), be provided with bar hole (4) along the center line of ruler (1), ruler (1) go up through be arranged on sliding axle (5) bar hole (4) in fixing on crossfoot (6); Crossfoot (6) center pit is enclosed within on the sliding axle (5); Be provided with at the right-hand member of bar hole (4) and make a concerted effort to regulate stationary shaft (7), the end of pulling out of two tape measures (3) passes the gap of pair roller (8) successively, walks around two ends of crossfoot (6) respectively, walks around to make a concerted effort to regulate stationary shaft (7) and connect as one again.
2. the synthetic and decomposition demonstration ruler of two power according to claim 1 is characterized in that: connect square plate (9) on the straight flange edge of described semicircle radian chi (2), the housing (10) of two tape measures (3) is fixed on the square plate (9).
3. the synthetic and decomposition demonstration ruler of two power according to claim 1, it is characterized in that: described crossfoot (6) is flat tubulose, and expansion plate (11) is inserted at two ends, and expansion plate (11) is fixing through bolt (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269736 CN202584503U (en) | 2012-06-08 | 2012-06-08 | Demonstration ruler for composing and decomposing two forces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220269736 CN202584503U (en) | 2012-06-08 | 2012-06-08 | Demonstration ruler for composing and decomposing two forces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202584503U true CN202584503U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220269736 Expired - Fee Related CN202584503U (en) | 2012-06-08 | 2012-06-08 | Demonstration ruler for composing and decomposing two forces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202584503U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824488A (en) * | 2014-03-25 | 2014-05-28 | 辽东学院 | Equivalent experiment table of planar concurrent force system |
-
2012
- 2012-06-08 CN CN 201220269736 patent/CN202584503U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824488A (en) * | 2014-03-25 | 2014-05-28 | 辽东学院 | Equivalent experiment table of planar concurrent force system |
| CN103824488B (en) * | 2014-03-25 | 2016-03-16 | 辽东学院 | The equivalent experiment platform of plane concurrent force system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130608 |