CN206516182U - Newton's second law experimental device for verifying - Google Patents
Newton's second law experimental device for verifying Download PDFInfo
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- CN206516182U CN206516182U CN201720125530.8U CN201720125530U CN206516182U CN 206516182 U CN206516182 U CN 206516182U CN 201720125530 U CN201720125530 U CN 201720125530U CN 206516182 U CN206516182 U CN 206516182U
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- plank
- substrate
- cushion block
- magnetic metal
- rack
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Abstract
The utility model discloses a kind of Newton's second law experimental device for verifying, it is related to physics facility field.It includes plank of the one end with pulley, dolly, dotted timer, drawstring, counterweight, paper tape, and dotted timer is installed on plank rear end；Substrate is provided with below plank；The substrate front end left and right sides is fixed with support plate；Plank front end is connected with support plate rotating shaft；The rear portion of substrate is provided with cushion block；The rear upper surface left and right sides of substrate is respectively and fixedly provided with magnetic metal bar；The cushion block lower end left and right sides is respectively and fixedly provided with magnet corresponding with magnetic metal bar；Between two magnetic metal bars, upper surface of base plate is fixed with rack；Cushion block lower end is provided with mounting groove corresponding with rack position；Rotating shaft is connected with gear in mounting groove, and wheel and rack engagement coordinates；Uniform intervals are provided with flashing indicator light along its length on the right side of plank.The beneficial effects of the utility model are：Simple in construction, cost is relatively low, and regulation is accurate, there is clear and definite speed estimation object of reference, using more convenient.
Description
Technical field
The utility model is related to physics facility field.
Background technology
In physics experiments of high school, it is related in the confirmatory experiment of Newton's second law, traditional experiment and is slided using one end band
The experimental provisions such as plank, cushion block, dolly, dotted timer, drawstring, counterweight, the paper tape of wheel are tested, in the preparatory stage, compared with
Needed during for important link using cushion block adjust plank angle of inclination, when dolly can at the uniform velocity move, to reach that balance is rubbed
Wipe in the effect of power, traditional regulative mode, the mobility of cushion block is stronger, when movable cushion block is adjusted, cushion block
The bad accurate assurance of displacement, causes displacement bigger than normal and causes plank angular adjustment larger, influence regulation process, and only
Cushion block position is fixed by the frictional force between cushion block and laboratory table, between cushion block and laboratory table, cushion block and plank it
Between wait and easily relatively move, and cause the change at plank angle of inclination, influence experimental data.Estimate dolly in student simultaneously
Whether uniform motion when, without the more clear and definite object of reference away from discrete time, visual inspection error is big, it is necessary to repeatedly using beating
Point timer is confirmed, causes paper tape to waste the consumption with the time.Therefore need to enter the regulation stage of traditional experiment device
Row is improved.
Utility model content
Technical problem to be solved in the utility model, is that there is provided a kind of newton for above-mentioned technical deficiency
Two law experimental device for verifying.Simple in construction, cost is relatively low, and regulation is accurate, has clear and definite speed estimation object of reference, use is more square
Just.
The technical solution adopted in the utility model is：A kind of Newton's second law experimental device for verifying, including one end are provided
Plank, dolly, dotted timer, drawstring, counterweight, paper tape with pulley, dotted timer are installed on plank rear end；Its feature exists
In：Substrate is provided with below plank；The substrate front end left and right sides is fixed with support plate；Plank front end is connected with support plate rotating shaft；Substrate
Rear portion be provided with cushion block, cushion block is between plank and substrate；The rear upper surface left and right sides of substrate is respectively and fixedly provided with magnetic gold
Belong to bar；The cushion block lower end left and right sides is respectively and fixedly provided with magnet corresponding with magnetic metal bar；Between two magnetic metal bars, on substrate
Surface is fixed with rack；Cushion block lower end is provided with mounting groove corresponding with rack position；Rotating shaft is connected with gear, gear in mounting groove
Cooperation is engaged with rack；Uniform intervals are provided with flashing indicator light along its length on the right side of plank.
Further optimize the technical program, the plank of Newton's second law experimental device for verifying is fixedly arranged at the front end with baffle plate, keep off
Plate is at pulley rear；Baffle plate rear end is fixed with buffering sponge.
Further optimize the technical program, the left side of the plank of Newton's second law experimental device for verifying is carved along its length
There is graduation mark.
The utility model is compared with traditional experiment device, and its advantage is：
1st, it using magnetic attraction of the magnet to magnetic metal bar, can be good at positioning the position of cushion block, reduce
In experimentation, the situation that cushion block is surprisingly slided, it is ensured that the angle position of plank is constant, the engagement of wheel and rack coordinates,
Make the mobile controlling of cushion block stronger, be convenient to accurately move cushion block to adjust the angle of inclination of plank.Plank front end and base
The support plate rotating shaft connection of plate, can be rotated, while the positioning to plank is preferable.Dolly test is discharged in the case of without pulling force is
During no balance frictional force, flashing indicator light can aid in naked eyes to judge, judge observation of students more convenient accurate, reduce paper tape
Use, be spaced uniformly between flashing indicator light, i.e., distance is identical between each two flashing indicator light, the flicker frequency of flashing indicator light
At the uniform velocity whether rate is certain, you can the aid prompting time, judge dolly so as to be convenient to auxiliary student；
2nd, in testing, dolly rushes at the front end of plank with certain speed, and baffle plate can prevent dolly from dropping, and buffers sponge energy
Enough play a part of buffering, reduce and hit and noise；
3rd, it is final to be confirmed whether that balance frictional force needs to carry out setting graduation mark on experimental observation, plank by paper tape
It is convenient to measure the point on paper tape in process of the test, without carrying the survey tools such as ruler again.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the utility model substrate rear end part structural representation；
Fig. 3 is cushion block polycrystalline substance schematic diagram；
In figure, 1, plank；2nd, dolly；3rd, dotted timer；4th, drawstring；5th, counterweight；6th, paper tape；7th, substrate；8th, support plate；9、
Cushion block；10th, magnetic metal bar；11st, magnet；12nd, rack；13rd, mounting groove；14th, gear；15th, flashing indicator light；16th, baffle plate；
17th, sponge is buffered；18th, graduation mark；19th, pulley.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As Figure 1-3, Newton's second law experimental device for verifying, including plank 1 of the one end with pulley 19, dolly 2, beat
Point timer 3, drawstring 4, counterweight 5, paper tape 6, dotted timer 3 are installed on the rear end of plank 1；It is characterized in that：The lower section of plank 1 is set
It is equipped with substrate 7；The front end left and right sides of substrate 7 is fixed with support plate 8；The front end of plank 1 is connected with the rotating shaft of support plate 8；The rear portion of substrate 7 is set
Cushion block 9 is equipped with, cushion block 9 is between plank 1 and substrate 7；The rear upper surface left and right sides of substrate 7 is respectively and fixedly provided with magnetic metal bar
10；The lower end left and right sides of cushion block 9 is respectively and fixedly provided with magnet 11 corresponding with magnetic metal bar 10；Between two magnetic metal bars 10,
The upper surface of substrate 7 is fixed with rack 12；The lower end of cushion block 9 is provided with mounting groove 13 corresponding with the position of rack 12；Turn in mounting groove 13
Axle is connected with gear 14, and gear 14 engages cooperation with rack 12；Uniform intervals are provided with flicker along its length on the right side of plank 1
Indicator lamp 15；Plank 1 is fixedly arranged at the front end with baffle plate 16, and baffle plate 16 is at the rear of pulley 19；The rear end of baffle plate 16 is fixed with buffering sponge 17；
Graduation mark 18 is carved with along its length in the left side of plank 1.
The utility model when in use, plank 1 of the one end with pulley 19, dolly 2, dotted timer 3, drawstring 4, counterweight 5,
Paper tape 6 is the device that uses in normal experiment, when adjusting the angle of inclination of plank 1, by cushion block 9 be positioned over plank 1 and substrate 7 it
Between, cushion block 9 slides back and forth on magnetic metal bar 10, during student's Manual push-pull cushion block 9, and gear 14 is in rack 12 and engages shape
State, when doing less transfer, can prevent firmly uneven and make the big distance of cushion block 9 mobile, gear 14 is with mounting groove 13 by turning
Axle rotates connection, can make the rotary resistance of rotating shaft larger by excessively coordinating, i.e. the rotation of gear 14 has certain resistance, with
Reach and improve the purpose that cushion block 9 moves controlling.When judging whether the angle of inclination of plank 1 has balanced frictional force, in dolly 2
Rear end connecting paper band 6, the other end of paper tape 6 passes through the spacing hole of dotted timer 3, but is not turned on dotted timer 3, discharges small
Car 2, by observation judge dolly 2 whether uniform motion, release dolly 2 give 2 one less initial velocity of dolly after, unlatching
Whether at the uniform velocity flashing indicator light 15, using the auxiliary of flashing indicator light 15, can estimate dolly 2, one kind is can by a variety of methods
Dolly 2 is observed all by the flashing times of flashing indicator light during each flashing indicator light 15 15, such as is dodged by each
The flashing times of bright indicator lamp 15 are twice, then to estimate dolly 2 at the uniform velocity to move, if dodging during by a flashing indicator light 15
The bright time exceedes twice, and when passing through next or flashing indicator light 15 below, the time within twice, then can determine whether dolly
2 are in acceleration mode, and similarly other motion states can also carry out auxiliary judgment, are that routine judges thinking；Dolly 2 can also be observed
Flashing times during flashing indicator light 15 adjacent by each two are judged, judge that principle is identical.If lack of equilibrium, continue to move to
Estimation is adjusted in cushion block 9 again, after estimation dolly 2 is at the uniform velocity moved, that is, thinks to basically reach to balance then open and get meter ready
When device 3 carry out experimental verification, method be normal experiment process.
Typically in an experiment, the record of experimental data is only carried out, without processing, the experimental data in this experiment is paper
Band 6, and between the point on by paper tape 6 is confirmed whether during balance frictional force, it is necessary to be put on more accurate measurement paper tape 6
Every, during traditional experiment, then need student additionally to carry ruler and measure, graduation mark 18 is arranged on to the side of plank 1,
Measurement can be then convenient to, without carrying ruler.The interval measurement that can also be put by the way of gauge, gauge is positioned over
On substrate 7.
The unlatching of flashing indicator light 15 can be operated with manual switches and be controlled, and can also increase infrared in the utility model
Automatically controlling for switch, installs infrared controlled switch, position and the flashing indicator light 15 of rear end first are neat in the upper surface of plank 1
Flat, when infrared controlled switch is passed through in the front end of dolly 2, you can open flashing indicator light 15 and flash, and now the front end of dolly 2 is just passed through
First flashing indicator light 15 is crossed, flashing indicator light 15 starts flicker, is convenient to the calculating of flashing times, while reducing artificial control
System.The installation of infrared controlled switch, to use etc. be conventional technical means.
The control circuit of flashing indicator light 15 in the utility model, is the technological means of conventional ripening, therefore do not do herein
Description.Experimentation is normal experiment step.Gear 14, rack 12 can use plastic material, and tooth pitch, transverse tooth thickness are smaller.
Claims (3)
1. a kind of Newton's second law experimental device for verifying, including one end band pulley（19）Plank（1）, dolly（2）, get meter ready
When device（3）, drawstring（4）, counterweight（5）, paper tape（6）, dotted timer（3）It is installed on plank（1）Rear end；It is characterized in that：Wood
Plate（1）Lower section is provided with substrate（7）；Substrate（7）The front end left and right sides is fixed with support plate（8）；Plank（1）Front end and support plate（8）
Rotating shaft is connected；Substrate（7）Rear portion be provided with cushion block（9）, cushion block（9）In plank（1）With substrate（7）Between；Substrate（7）After
The portion upper surface left and right sides is respectively and fixedly provided with magnetic metal bar（10）；Cushion block（9）The lower end left and right sides is respectively and fixedly provided with and magnetic metal
Bar（10）Corresponding magnet（11）；Two magnetic metal bars（10）Between, substrate（7）Upper surface is fixed with rack（12）；Cushion block
（9）Lower end is provided with and rack（12）The corresponding mounting groove in position（13）；Mounting groove（13）Interior rotating shaft is connected with gear（14）, gear
（14）With rack（12）Engagement coordinates；Plank（1）Uniform intervals are provided with flashing indicator light along its length on right side（15）.
2. Newton's second law experimental device for verifying according to claim 1, it is characterised in that：Plank（1）Front end is fixed
There is baffle plate（16）, baffle plate（16）In pulley（19）Rear；Baffle plate（16）Rear end is fixed with buffering sponge（17）.
3. Newton's second law experimental device for verifying according to claim 1, it is characterised in that：Plank（1）Left side edge
Length direction is carved with graduation mark（18）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720125530.8U CN206516182U (en) | 2017-02-13 | 2017-02-13 | Newton's second law experimental device for verifying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720125530.8U CN206516182U (en) | 2017-02-13 | 2017-02-13 | Newton's second law experimental device for verifying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206516182U true CN206516182U (en) | 2017-09-22 |
Family
ID=59867169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720125530.8U Expired - Fee Related CN206516182U (en) | 2017-02-13 | 2017-02-13 | Newton's second law experimental device for verifying |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206516182U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364547A (en) * | 2018-02-08 | 2018-08-03 | 枣庄学院 | A kind of machinery system dynamics experimental provision |
-
2017
- 2017-02-13 CN CN201720125530.8U patent/CN206516182U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364547A (en) * | 2018-02-08 | 2018-08-03 | 枣庄学院 | A kind of machinery system dynamics experimental provision |
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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: 20170922 Termination date: 20180213 |