CN206921349U - A kind of lever used for physics instructional device - Google Patents
A kind of lever used for physics instructional device Download PDFInfo
- Publication number
- CN206921349U CN206921349U CN201720589109.2U CN201720589109U CN206921349U CN 206921349 U CN206921349 U CN 206921349U CN 201720589109 U CN201720589109 U CN 201720589109U CN 206921349 U CN206921349 U CN 206921349U
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- China
- Prior art keywords
- lever
- crossbeam
- physics
- dynamometer
- instructional device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model provides a kind of lever used for physics instructional device, including base, lever, both sides are provided with vertical supporting above the base, crossbeam is provided with above vertical supporting, base, two vertical supportings, crossbeam forms rectangular box structure, the crossbeam is provided with the lever dolly for support lever, several connecting holes being engaged with lever dolly are provided with lever central to its right part, lever left end is fastened on the first dynamometer on crossbeam, lever right-hand member is fastened on the second dynamometer on base, balance weight mechanism is provided with above lever right-hand member.The present apparatus is simple in construction, conveniently leveling, it is possible to increase the efficiency in physical teaching course, while it is easy to student intuitively to observe and understand lever principle.
Description
Technical field
The utility model relates generally to a kind of teaching aid for lever principle teaching, specifically a kind of lever used for physics teaching dress
Put.
Background technology
Lever principle is a branch of instruction in school indispensable in Physics Course, with the lifting of teaching level, is learned for convenience
Raw understanding.There is various lever demonstration devices in present teaching process, its primary structure principle is as follows：That is lever
Fixed pivot, but lever length can be adjusted by side or opposite side, and reach lever by increasing counterweight in lever both sides
The relation between lever force and the arm of force is observed after to equilbrium position.It is inconvenient typically there is lever regulation in this class formation, it is difficult
To allow student intuitively to observe, balance pivot changes the influence to power；Furthermore because lever both ends do not support, easily by the wind
Blow and other influences are difficult that lever is adjusted into equilbrium position, when being adjusted especially by counterweight, because counterweight weight is consolidated
It is fixed, it is difficult to piece together out suitable weight, the above situation frequently can lead to waste time in classroom, student is easily suspected the flat of lever
The principle that weighs influences the problem of teaching quality.
Utility model content
To solve the deficiency of current technology, a kind of the utility model combination prior art, from practical application, there is provided thing
Lever instructional device is managed, the present apparatus is simple in construction, conveniently leveling, it is possible to increase the efficiency in physical teaching course, is easy to simultaneously
Student intuitively observes and understood lever principle.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of lever used for physics instructional device, including base, lever, base top both sides are provided with vertical supporting, erected
Support top is provided with crossbeam, base, two vertical supportings, crossbeam composition rectangular box structure, the crossbeam, which is provided with, to be used
In the lever dolly of support lever, several connections being engaged with lever dolly are provided with lever central to its right part
Hole, lever left end are fastened on the first dynamometer on crossbeam, and lever right-hand member is fastened on the second dynamometer on base,
Balance weight mechanism is provided with above lever right-hand member.Balancing weight is provided with below the lever left end.
The balance weight mechanism includes cup mounting seat, and measuring cup is placed with the cup mounting seat, and the crossbeam top is solid
Surely there is bucket, the water service pipe for adding water for measuring cup is provided with the bucket, valve is provided with the water service pipe.
The water service pipe includes rigid piping systems and flexible pipe, and rigid piping systems one end connection bucket other end connection is soft
Property pipe fitting, the valve are arranged on rigid piping systems.
The lever left end and right-hand member are provided with rotating wheel, and the rotating wheel is spindle rotationally arranged in lever by wheel shaft
On, the shackle being engaged with the first dynamometer, the second dynamometer is installed on rotating wheel.
The lever dolly includes the support plate for being clamped in crossbeam both sides and lever both sides, is provided with pin hole on support plate, sells
Connected between nail and connecting hole by pluggable pin.
Chute is provided with crossbeam, the sliding block coordinated with slide is provided with the inside of support plate.
The beneficial effects of the utility model：
1st, the utility model is mainly used in lever principle teaching use, is lever one end by adjusting balance pivot position
Counterweight makes observation and the relation of the arm of force after lever balance, because in the utility model, lever both ends use weight beam
Dynamometry is carried out, when two weight beam registrations are zero, illustrates that lever reaches plateau, with traditional cylinder rod both ends without any
The structure of support is compared, conveniently leveling, and is easy to observe.
2nd, in the utility model, after balance pivot is adjusted, by adding water to realize counterweight, water in the measuring cup of lever right-hand member
Stream can realize any Weight control by Valve controlling, after lever reaches steady, shown by measuring cup increase whose volume from
And weight can be quickly calculated, and to be compared compared to traditional counterweight counterweight mode, this structure operation is more simple, and control is more accurate,
Easily realize the counterweight of lever.
3rd, in the utility model, when needing to change balance pivot, pin only need to be extracted, lever dolly is moved to next
Corresponding connection hole position plugs pin, has the advantages of easy to operate, directly perceived, to be easy to observation of students to understand.
4th, it can ensure the vertical stress of dynamometer by the rotation wheel construction of setting in the utility model, make dynamometer
It is small to measure accurate error.
Brief description of the drawings
Accompanying drawing 1 is the utility model general structure schematic diagram；
Accompanying drawing 2 is the utility model lever dolly structural representation；
Accompanying drawing 3 is the utility model rotating wheel structural representation.
Label shown in accompanying drawing：1st, base；2nd, vertical supporting；3rd, balancing weight；4th, lever；5th, the first dynamometer；6th, chute；
7th, crossbeam；8th, pin；9th, lever dolly；10th, connecting hole；11st, rigid piping systems；12nd, bucket；13rd, valve；14th, flexible pipe；
15th, measuring cup；16th, the second dynamometer；17th, sliding block；18th, pin hole；19th, support plate；20th, wheel shaft；21st, rotating wheel；22nd, shackle；23、
Cup mounting seat.
Embodiment
With reference to the drawings and specific embodiments, the utility model is described in further detail.It should be understood that these embodiments are only used for
Illustrate the utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the utility model instruction
Content after, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall
In scope defined herein.
As shown in accompanying drawing 1~3, a kind of lever used for physics instructional device, including base 1, lever 4, the top both sides of base 1
Vertical supporting 2 is provided with, the top of vertical supporting 2 is provided with crossbeam 7, and 1, two vertical supporting 2 of base, crossbeam 7 form rectangle frame
Body structure, the crossbeam 7 is provided with the lever dolly 9 for support lever 4, if being provided with the center of lever 4 to its right part
The dry connecting hole 10 being engaged with lever dolly 9, the left end of lever 4 are fastened on the first dynamometer 5 on crossbeam 7, lever 4
Right-hand member is fastened on the second dynamometer 16 on base 1, and balance weight mechanism is provided with above the right-hand member of lever 4.
The utility model middle cross beam 7 is located at the top of base 1, is connected between crossbeam 7 and base 1 by the vertical supporting 2 of both sides
Connect, the first dynamometer 5 is fixed on the lower surface of crossbeam 7, and the left end of lever 4, the second dynamometry are connected at the hook of the first dynamometer 5
Meter 16 is fixed on the upper surface of base 1, and the right-hand member of lever 4 is connected at the hook of the second dynamometer 16.As shown in Figure 3, exist
The left end of lever 4 and right-hand member are provided with rotating wheel 21, and rotating wheel 21 is spindle rotationally arranged on lever 4 by wheel shaft 20, rotate
The shackle 22 being engaged with the first dynamometer 5, the second dynamometer 16, the first dynamometer 5 and the second dynamometer are installed on wheel 21
16 hook is hung on corresponding shackle 22, because rotating wheel 21 can carry out rotation regulation when lever 4 tilts, therefore can one
The straight measurement for ensureing the first dynamometer 5 and the in the vertical direction of the second dynamometer 16 to power.And the first dynamometer 5 and the second dynamometry
Meter 16 should be guaranteed that, when lever 4 is in horizontality, the first dynamometer 5 and the registration of the second dynamometer 16 are zero.
A connecting hole 10 is provided with the middle of lever 4 of the present utility model, the right side of connecting hole 10 sets more again successively
Individual connecting hole.The structure of lever dolly 9 as shown in Figure 2, including is clamped in the support plate 19 of the both sides of crossbeam 7 and the both sides of lever 4, support plate
Pin hole 18 is provided with 19, is connected by pluggable pin 8 between pin hole 18 and connecting hole 10, is set on crossbeam 7
There is chute 6, the inner side of support plate 19 is provided with the sliding block 17 being slidably matched with chute 6.Pin 8 is inserted into pin hole 18 and connecting hole 10
Afterwards, the be hinged of lever 4 and pin 8 can be achieved, now exerted a force to the either end of lever 4, lever 4 tilts, the first dynamometer 5 and the
The registration of two dynamometer 16 can change.When needing to change 4 position of the fulcrum of lever, pin 8 is pulled up, promotes lever dolly 9 to exist
Slided in chute 6, the pin hole 18 on support plate 19 is directed at the connecting hole 10 of required position of the fulcrum, install pin 8.
The balancing weight 3 that the left end of the utility model lever 4 is set is directly anchored on lever 4, in order to avoid lever 4 itself too tinge
Experiment effect is rung, the balance weight mechanism of the other end of lever 4 includes cup mounting seat 23, measuring cup 15 is placed with cup mounting seat 23,
Crossbeam 7 is fixedly arranged above bucket 12, and the water service pipe for adding water for measuring cup 15 is provided with bucket 12, valve is provided with water service pipe
Door 13.Installation in order to facilitate valve 13 and with water service pipe into measuring cup 15 plus water, water service pipe of the present utility model include rigidity
Pipe fitting 11 and flexible pipe 14, the one end of rigid piping systems 11 connection bucket 12 other end connection flexible pipe 14, valve 13 are arranged on
On rigid piping systems 11.In the utility model, measuring cup 15, the weight of cup mounting seat 23 should meet, when anhydrous in measuring cup 15
When, the connecting hole 10 at lever dolly 9 and the center of lever 4 is coordinated, lever 4 should be at equilbrium position, i.e. the first dynamometer 5
Registration with the second dynamometer 16 should all be zero.
When needing to demonstrate, during the different variation relations with power in balance pivot position, lever dolly 9 is promoted from left to right successively
Coordinate with corresponding connecting hole 10, balance pivot is changed successively, due to moving right with balance pivot, lever 4 can be to
Left side is slightly slanted, and can now be observed registration on the first dynamometer 5 and the second dynamometer 16 and is not zero, then should open
Valve 13 adds water into measuring cup 15, and as water gradually increases in measuring cup 15, lever 4 can gradually become horizontal, until first surveys
On the dynamometer 16 of power meter 5 and second during registration vanishing, illustrate that lever 4 reaches horizontal level, now can be by observing measuring cup 15
The volume of interior water calculates the weight of added water, then observes lever both ends apart from the position of fulcrum according to the scale on lever 4,
Go to verify the formula in lever principle.
The utility model is simple in construction, conveniently leveling, can greatly improve teachers' instruction efficiency, while be easy to student to manage
Solution.
Claims (7)
1. a kind of lever used for physics instructional device, including base (1), lever (4), it is characterised in that：Both sides above the base (1)
Vertical supporting (2) is provided with, crossbeam (7), base (1), two vertical supportings (2), crossbeams are provided with above vertical supporting (2)
(7) rectangular box structure is formed, the crossbeam (7) is provided with the lever dolly (9) for support lever (4), in lever (4)
The heart to its right part is provided with several connecting holes (10) being engaged with lever dolly (9), and lever (4) left end is fastened on
The first dynamometer (5) on crossbeam (7), lever (4) right-hand member are fastened on the second dynamometer (16) on base (1), lever
(4) it is provided with balance weight mechanism above right-hand member.
A kind of 2. lever used for physics instructional device as claimed in claim 1, it is characterised in that：Set below lever (4) left end
It is equipped with balancing weight (3).
A kind of 3. lever used for physics instructional device as claimed in claim 2, it is characterised in that：The balance weight mechanism is pacified including cup
Seat (23) is filled, is placed with measuring cup (15) in the cup mounting seat (23), the crossbeam (7) is fixedly arranged above bucket (12), institute
The water service pipe being provided with bucket (12) for for measuring cup (15) plus water is stated, valve (13) is provided with the water service pipe.
A kind of 4. lever used for physics instructional device as claimed in claim 3, it is characterised in that：The water service pipe includes rigid piping systems
(11) and flexible pipe (14), described rigid piping systems (11) one end connection bucket (12) other end connect flexible pipe (14), institute
Valve (13) is stated to be arranged on rigid piping systems (11).
A kind of 5. lever used for physics instructional device as claimed in claim 1, it is characterised in that：Lever (4) left end and right-hand member
Rotating wheel (21) is provided with, the rotating wheel (21) is spindle rotationally arranged on lever (4) by wheel shaft (20), rotating wheel
(21) shackle (22) being engaged with the first dynamometer (5), the second dynamometer (16) is installed on.
A kind of 6. lever used for physics instructional device as claimed in claim 1, it is characterised in that：The lever dolly (9) includes folder
The support plate (19) in crossbeam (7) both sides and lever (4) both sides is held, pin hole (18), pin hole (18) are provided with support plate (19)
Connected between connecting hole (10) by pluggable pin (8).
A kind of 7. lever used for physics instructional device as claimed in claim 6, it is characterised in that：Chute is provided with crossbeam (7)
(6) sliding block (17) being slidably matched with chute (6), is provided with the inside of support plate (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720589109.2U CN206921349U (en) | 2017-05-24 | 2017-05-24 | A kind of lever used for physics instructional device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720589109.2U CN206921349U (en) | 2017-05-24 | 2017-05-24 | A kind of lever used for physics instructional device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206921349U true CN206921349U (en) | 2018-01-23 |
Family
ID=61308383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720589109.2U Expired - Fee Related CN206921349U (en) | 2017-05-24 | 2017-05-24 | A kind of lever used for physics instructional device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206921349U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109035996A (en) * | 2018-09-30 | 2018-12-18 | 浙江德清爱特电子科技有限公司 | Lever pulls out radish simulation teching apparatus |
| CN109100227A (en) * | 2018-08-24 | 2018-12-28 | 江苏隆达生物科技有限公司 | A kind of Portable egg shell intensity analyzer |
| CN109035996B (en) * | 2018-09-30 | 2024-04-19 | 南京满周繁星网络科技有限公司 | Lever-type radish pulling simulation teaching tool |
-
2017
- 2017-05-24 CN CN201720589109.2U patent/CN206921349U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100227A (en) * | 2018-08-24 | 2018-12-28 | 江苏隆达生物科技有限公司 | A kind of Portable egg shell intensity analyzer |
| CN109035996A (en) * | 2018-09-30 | 2018-12-18 | 浙江德清爱特电子科技有限公司 | Lever pulls out radish simulation teching apparatus |
| CN109035996B (en) * | 2018-09-30 | 2024-04-19 | 南京满周繁星网络科技有限公司 | Lever-type radish pulling simulation teaching tool |
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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: 20180123 Termination date: 20190524 |