CN106601088B - A kind of centripetal force demonstration apparatus - Google Patents
A kind of centripetal force demonstration apparatus Download PDFInfo
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- CN106601088B CN106601088B CN201611186313.6A CN201611186313A CN106601088B CN 106601088 B CN106601088 B CN 106601088B CN 201611186313 A CN201611186313 A CN 201611186313A CN 106601088 B CN106601088 B CN 106601088B
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- shaft
- rack
- radius
- centripetal force
- rotating speed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
Abstract
The present invention relates to physics teaching teaching aid fields, specifically a kind of centripetal force demonstration apparatus, including rack, shaft, device for measuring force, rotating speed display device and crank, the shaft is vertically installed in rack, shaft is hollow shaft, threaded hole is provided in the middle part of shaft, crank is mounted in rack and is rotated by bevel gear driving shaft, the device for measuring force passes through spindle central and is fixed on the left of rack, device for measuring force can directly measure the size of centripetal force, the rotating speed display device is coaxially mounted to shaft upper surface, rotating speed display device can measure the rotating speed of circular motion.The present invention can carry out quantitative measurment, can control respectively quality, the radius of gyration and rotating speed, and can disposably be measured multi-group data; without shutdown adjustment, the circular motion in horizontal plane to vertical plane can be studied, it is simple in structure; manufacturing cost is relatively low, is conducive to promote and use.
Description
Technical field
The present invention relates to physics teaching teaching aid field, specifically a kind of centripetal force demonstration apparatus.
Background technology
It is known that in high school physics textbook, " centripetal force " is very important knowledge point.In teaching practice, about centripetal
Obtaining for the research of power, especially formula is teaching difficulty, the theory deduction process of the formula is excessively abstract for student,
It is not readily understood, and the experimental study carried out substantially carries out centripetal force with conical pendu0 or similar device and verifies roughly, shortage section
The property learned, accuracy and comparativity, actual effect are undesirable；And " the centripetal force fiber communication experiment demonstration instrument " employed in teaching material over the years
Only sxemiquantitative.
In the prior art, applying date 2013.01.29, application No. is 201320047446.0 Chinese patents；
The applying date is 2010.11.03, and application No. is 201020598363.7 Chinese patents；
The applying date is 2013.10.23, and application No. is 201320655617.8 Chinese patents；
The applying date is 2014.03.20, and application No. is 201420126096.1 Chinese patents；
The applying date is 2015.05.25, and application No. is 201520340466.6 Chinese patents；
Exist following one or more of insufficient：
1. can only qualitative research centripetal force, be unable to quantitative study；
2. being driven by motor, though speed change can be realized, cannot work when having a power failure, use scope is restricted；
3. cannot disposably measure all data when being tested, replacement experimental condition, such as quality need to be stalled；
4. for the device rotated manually, rotating speed is easily disturbed, and causes experimental error larger.
The applying date is 2012-01-17, and application No. is 201210013683.5 Chinese patents to disclose one kind wirelessly
Centripetal force experimental tool, the invention carry out determining quantifier elimination using various sensors, and using the wireless transmission of data, although obtaining
Data it is more accurate, but manufacturing cost is too high, is unfavorable for promoting the use of.
In view of the above problems, a kind of centripetal force demonstration apparatus provided by the invention, is provided using traditional mechanical hand-rail type
Power inputs, and the present invention is provided with flywheel, and the defect of rotary speed unstabilization, no motor can be overcome to drive and be provided with generator, energy
It is enough to work in the environment of power failure or dark, using Variable Control method, multiple data of multiple variables can be disposably measured,
Without stalling, the precision of experiment can be improved, reduces experimental error, shortens experimental period, the tilt stand of setting can be realized
Horizontal plane is to the circular motion in vertical plane any angle, and simple and reliable for structure, manufacturing cost is relatively low, is conducive to promote and make
With.
Invention content
The technical problem to be solved by the present invention is to：A kind of centripetal force demonstration apparatus is provided, quantitative measurment can be carried out, it can
Quality, the radius of gyration and rotating speed are controlled respectively, and can disposably be measured multi-group data, it, can without stalling adjustment
Circular motion in horizontal plane to vertical plane is studied.
The technical solution adopted by the present invention to solve the technical problems is：A kind of centripetal force demonstration apparatus, including rack, turn
Axis, device for measuring force, rotating speed display device and crank, the shaft are vertically installed in rack, and shaft is hollow shaft, shaft
Middle part is provided with threaded hole, and crank is mounted in rack and is rotated by bevel gear driving shaft, and the device for measuring force passes through
Spindle central is simultaneously fixed on the left of rack, and the rotating speed display device is coaxially mounted to shaft upper surface.
The device for measuring force includes sliding rail, and sliding rail is fixed on rack left side edge vertically, and it is vertical to be provided on the left of sliding rail
Sliding slot, be provided with the dynamometer slided along sliding slot in sliding slot, the top of sliding rail is provided with wire twister, rigidity is wound on wire twister
Rope, the free end rigidly restricted is connected with dynamometer, the lifting of the controllable dynamometer of wire twister, the lower end of dynamometer and drawstring
One end is connected, and the other end of drawstring passes through pulley blocks and one end of the radius in shaft to be connected, drawstring and radius
Between be provided with expansion controlling ring-shaped insert, expansion controlling ring-shaped insert is formed by connecting rod and positioned at connecting rod both ends and the annulus that can be rotated relative to connecting rod,
Annulus can be freely rotated in connecting rod, and expansion controlling ring-shaped insert can avoid the rotation of radius at work, and extend radius uses the longevity
Life, the threaded hole of the other end of radius in the middle part of shaft are pierced by and are connected with counterweight, and radius passes through fairlead, fairlead
On the threaded hole of shaft, the aperture of fairlead is equal to the diameter of radius, and fairlead can avoid the radius in rigid rotation
Line twisting shaft, can shorten and start the time, and dynamometer can directly measure centripetal force, can be realized by the retractable cable of wire twister
The change of radius, to realize the change of the radius of gyration.
The rotating speed display device includes axis, gravity ring and steel ball, and axis is coaxially mounted to the top of shaft, gravity ring set
On axis, steel ball is connected with axis and gravity ring respectively by rope, scale is provided on axis, when shaft rotates, steel ball does circumference
Gravity ring can be pulled upwardly by the centripetal force that movement generates, and pass through the scale on axis, it may be determined that the rotating speed of shaft.
Preferably, the invention also includes tilting gearing, tilting gearing includes tilting rack and four fixed pins, the inclination
Frame includes two L-shaped framves, and L-shaped frame is arranged in vertical L-shaped, and connecting plate is provided between two L-shaped framves, is arranged below L-shaped frame
There is supporting leg, L-shaped groove a is provided on L-shaped frame, sliding slot b is provided on L-shaped groove a, the fixed pin is provided at both ends with screw thread, Gu
Rationed marketing is horizontally arranged at four corners of rack, is provided with the bearing slided on sliding slot b on fixed pin, fixed pin end is set
Be equipped with tightening nut, be provided with rubber washer on tightening nut, rubber washer can increasing friction force, fixed pin transports in L-shaped groove
Dynamic, bearing slides on the chute, and when tightening nut screws, tightening nut clamps tilting rack with bearing, can fix fixed pin
In a certain position, to which rack inclining is fixed on tilting rack.
Preferably, the invention also includes flywheel, flywheel is mounted in shaft and below rack, and flywheel, which can increase, to be turned
The stability of speed.
Preferably, the invention also includes generator, generator is connected by bevel gear with shaft, and generator passes through electric wire
It is connected with light bulb, when dark or power failure, the present apparatus can be illuminated by electrical power generators and by light bulb.
Preferably, the invention also includes level meter, level meter is mounted on the upper surface of rack, can pass through level in experiment
Instrument adjusts shelf position, makes at circular motion in the horizontal plane, to reduce experimental error, level meter can also be arranged in rack inclining
When measure angle of inclination, convenient for the research to move in a circle in non-horizontal surface.
Preferably, the colour circle that length is 5mm is provided in the radius, and adjacent colour circle spacing is 5mm, is led to
The radius of gyration can intuitively be observed by crossing colour circle, and reading is more convenient.
Preferably, the counterweight is made of ndfeb magnet, counterweight outer surface be arranged rubber sleeve, quality of research with
When the relationship of centripetal force, two pieces of counterweights can be made to be attached together, to increase by another piece of counterweight close to the counterweight rotated
The change of quality can be realized without stalling for the quality of counterweight, collision when rubber sleeve can protect counterweight mutually to adsorb.
The beneficial effects of the invention are as follows：
1. a kind of centripetal force demonstration apparatus of the present invention, can carry out quantitative measurment, multigroup number can be disposably measured
According to without shutdown adjustment；
2. a kind of centripetal force demonstration apparatus of the present invention, can not only study the circular motion of horizontal plane, but also can
The circular motion of clinoplain is studied, and simple in structure, manufacturing cost is relatively low；
3. a kind of centripetal force demonstration apparatus of the present invention is inputted, it is ensured that device using traditional hand-rail type power
It is non-uniform scarce to can avoid traditional hand-rail type power input speed using the rotator inertia of flywheel for the reliability of normal operation
It falls into.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the front view of the present invention；
Fig. 2 is the left view of the present invention；
Fig. 3 is the L-shaped frame of the present invention；
Fig. 4 is the left view when present invention tilts；
Fig. 5 is the A direction views of Fig. 4；
Fig. 6 is the sectional view of the expansion controlling ring-shaped insert of the present invention；
In figure：Rack 1, shaft 2, device for measuring force 3, sliding rail 301, dynamometer 302, wire twister 303, drawstring 304, pulley blocks
305, expansion controlling ring-shaped insert 306, annulus 3061, connecting rod 3062, radius 307, counterweight 308, fairlead 309, rotating speed display device 4,
Axis 401, steel ball 403, tilting gearing 5, tilting rack 501, L-shaped frame 5011, connecting plate 5012, supporting leg 5013, is consolidated gravity ring 402
Rationed marketing 502, bearing 503, tightening nut 504, rubber washer 505, crank 6, flywheel 7, generator 8, light bulb 9, L-shaped groove a, sliding slot
b。
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
The drawings and specific embodiments are closed, the present invention is further explained.
As shown in Figures 1 to 6, a kind of centripetal force demonstration apparatus of the present invention, including rack 1, shaft 2, dynamometry dress
3, rotating speed display device 4 and crank 6 are set, the shaft 2 is vertically installed in rack 1, and shaft 2 is hollow shaft, in shaft 2
Portion is provided with threaded hole, and crank 6 is mounted in rack 1 and is rotated by bevel gear driving shaft 2, and the device for measuring force 3 is worn
It crosses 2 center of shaft and is fixed on 1 left side of rack, the rotating speed display device 4 is coaxially mounted to 2 upper surface of shaft.
The device for measuring force 3 includes sliding rail 301, and sliding rail 301 is fixed on 1 left side edge of rack, 301 left side of sliding rail vertically
It is provided with vertical sliding slot, the dynamometer 302 slided along sliding slot is provided in sliding slot, the top of sliding rail 301 is provided with wire twister
303, rigid rope is wound on wire twister 303, and the free end rigidly restricted is connected with dynamometer 302, and wire twister 303 can control dynamometry
The lower end of the lifting of device 302, dynamometer 302 is connected with one end of drawstring 304, the other end of drawstring 304 pass through pulley blocks 305 with
One end of radius 307 in shaft 2 is connected, and expansion controlling ring-shaped insert 306, anti-rotation are provided between drawstring 304 and radius 307
Ring 306 is formed by connecting rod 3062 and positioned at 3062 both ends of connecting rod and the annulus 3061 that can be rotated relative to connecting rod 3062,
Annulus 3061 can be freely rotated in connecting rod 3062, and expansion controlling ring-shaped insert 306 can avoid the rotation of radius 307 at work, extend
The other end of the service life of radius 307, radius 307 is pierced by from the threaded hole at 2 middle part of shaft and is connected with counterweight 308
It connects, radius 307 passes through fairlead 309, fairlead 309 to be mounted on the threaded hole of shaft 2, and the aperture of fairlead 309 is equal to
The diameter of radius 307, fairlead 309 can avoid 307 twisting shaft 2 of radius in rigid rotation, can shorten and start the time,
Dynamometer 302 can directly measure centripetal force, and the change of radius 307 can be realized by the retractable cable of wire twister 303, to real
The change of the existing radius of gyration.
The rotating speed display device 4 includes axis 401, gravity ring 402 and steel ball 403, and axis 401 is coaxially mounted to shaft 2
Upper surface, gravity ring 402 is sleeved on axis 401, and steel ball 403 is connected with axis 401 and gravity ring 402 respectively by rope, axis 401
On be provided with scale, when shaft 2 rotates, gravity ring 402 can be pulled upwardly by the move in a circle centripetal force of generation of steel ball 403,
Pass through the scale on axis 401, it may be determined that the rotating speed of shaft 2.
Preferably, the invention also includes tilting gearing 5, tilting gearing 5 includes tilting rack 501 and four fixed pins 502, institute
The tilting rack 501 stated includes two L-shaped framves 5011, and L-shaped frame 5011 is arranged in vertical L-shaped, is arranged between two L-shaped framves 5011
There are connecting plate 5012,5011 lower section of L-shaped frame to be provided with supporting leg 5013, L-shaped groove a is provided on L-shaped frame 5011, is arranged on L-shaped groove a
There are sliding slot b, the fixed pin 502 to be provided at both ends with screw thread, fixed pin 502 is horizontally arranged at four corners of rack 1, Gu
The bearing 503 slided on sliding slot b is provided in rationed marketing 502,502 end of fixed pin is provided with tightening nut 504, tightening nut
Be provided with rubber washer 505 on 504, rubber washer 505 can increasing friction force, fixed pin 502 moves in L-shaped groove a, bearing
503 slide on sliding slot b, and when tightening nut 504 screws, tightening nut 504 clamps tilting rack 501 with bearing 503, can will consolidate
Rationed marketing 502 is fixed on a certain position, to which the inclination of rack 1 to be fixed on tilting rack 501.
Preferably, the invention also includes flywheel 7, flywheel 7 is mounted in shaft 2 and positioned at 1 lower section of rack, flywheel 7 can
Increase the stability of rotating speed.
Preferably, the invention also includes generator 8, generator 8 is connected by bevel gear with shaft 2, and generator 8 passes through
Electric wire is connected with light bulb 9, when dark or power failure, can be generated electricity by generator 8 and illuminate the present apparatus by light bulb 9.
Preferably, the invention also includes level meter, level meter is mounted on the upper surface of rack 1, can pass through water in experiment
Level adjusts 1 position of rack, makes at circular motion in the horizontal plane, to reduce experimental error, level meter can also be tilted in rack 1
Angle of inclination is measured when arrangement, convenient for the research to move in a circle in non-horizontal surface.
Preferably, the colour circle that length is 5mm is provided in the radius 307, and adjacent colour circle spacing is
5mm can intuitively observe the radius of gyration by colour circle, and reading is more convenient.
Preferably, the counterweight 308 is made of ndfeb magnet, and rubber sleeve is arranged in 308 outer surface of counterweight, is studying
When the relationship of quality and centripetal force, two pieces of counterweights 308 can be made to adsorb by another piece of counterweight 308 close to the counterweight 308 rotated
Together, to increase the quality of counterweight 308, collision when rubber sleeve can protect counterweight 308 mutually to adsorb, without stalling
Realize the change of quality.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the description in above embodiments and description only illustrates the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these change and change
Into all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (7)
1. a kind of centripetal force demonstration apparatus, it is characterised in that：It is shown including rack (1), shaft (2), device for measuring force (3), rotating speed
Device (4) and crank (6), the shaft (2) are vertically installed in rack (1), and shaft (2) is hollow shaft, in shaft (2)
Portion is provided with threaded hole, and crank (6) is mounted in rack (1) and is rotated by bevel gear driving shaft (2), dynamometry dress
(3) are set across shaft (2) center and are fixed on the left of rack (1), the rotating speed display device (4) is coaxially mounted to shaft
(2) upper surface, wherein：
The device for measuring force (3) includes sliding rail (301), and sliding rail (301) is fixed on rack (1) left side edge, sliding rail vertically
(301) left side is provided with vertical sliding slot, and the dynamometer (302) slided along sliding slot, the top of sliding rail (301) are provided in sliding slot
It is provided with wire twister (303), wire twister is wound with rigid rope on (303), and the free end rigidly restricted is connected with dynamometer (302),
The lower end of dynamometer (302) is connected with one end of drawstring (304), and the other end of drawstring (304) passes through pulley blocks (305) and is located at
One end of radius (307) in shaft (2) is connected, and expansion controlling ring-shaped insert is provided between drawstring (304) and radius (307)
(306), expansion controlling ring-shaped insert (306) and by connecting rod (3062) and positioned at connecting rod (3062) both ends can be rotated relative to connecting rod (3062)
Annulus (3061) composition, the threaded hole of the other end of radius (307) in the middle part of shaft (2) be pierced by and with counterweight (308) phase
Connection, radius (307) pass through fairlead (309), fairlead (309) to be mounted on the threaded hole of shaft (2), fairlead
(309) aperture is equal to the diameter of radius (307)；
The rotating speed display device (4) includes axis (401), gravity ring (402) and steel ball (403), and axis (401) is coaxially mounted to
The top of shaft (2), gravity ring (402) are sleeved on axis (401), steel ball (403) by restrict respectively with axis (401) and gravity ring
(402) it is connected, axis is provided with scale on (401).
2. a kind of centripetal force demonstration apparatus according to claim 1, it is characterised in that：Further include tilting gearing (5), tilts
Device (5) includes tilting rack (501) and four fixed pins (502), and the tilting rack (501) includes two L-shaped framves (5011),
L-shaped frame (5011) is arranged in vertical L-shaped, and connecting plate (5012), L-shaped frame (5011) are provided between two L-shaped framves (5011)
Lower section is provided with supporting leg (5013), and L-shaped groove (a) is provided on L-shaped frame (5011), and sliding slot (b) is provided in L-shaped groove (a), described
Fixed pin (502) be provided at both ends with screw thread, fixed pin (502) is horizontally arranged at four corners of rack (1), fixed pin
(502) bearing (503) slided on sliding slot (b) is provided on, fixed pin (502) end is provided with tightening nut (504), rotation
It is provided with rubber washer (505) on tight nut (504).
3. a kind of centripetal force demonstration apparatus according to claim 1, it is characterised in that：Further include flywheel (7), flywheel (7)
In shaft (2) and below rack (1).
4. a kind of centripetal force demonstration apparatus according to claim 1, it is characterised in that：Further include generator (8), generator
(8) it is connected with shaft (2) by bevel gear, generator (8) is connected by electric wire with light bulb (9).
5. a kind of centripetal force demonstration apparatus according to claim 1, it is characterised in that：Further include level meter, level meter peace
Upper surface mounted in rack (1).
6. a kind of centripetal force demonstration apparatus according to claim 1, it is characterised in that：It is set in the radius (307)
It is equipped with the colour circle that length is 5mm, and adjacent colour circle spacing is 5mm.
7. a kind of centripetal force demonstration apparatus according to claim 1, it is characterised in that：The counterweight (308) is by neodymium iron
Boron magnets are made, and rubber sleeve is arranged in counterweight (308) outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611186313.6A CN106601088B (en) | 2016-12-20 | 2016-12-20 | A kind of centripetal force demonstration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611186313.6A CN106601088B (en) | 2016-12-20 | 2016-12-20 | A kind of centripetal force demonstration apparatus |
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| Publication Number | Publication Date |
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| CN106601088A CN106601088A (en) | 2017-04-26 |
| CN106601088B true CN106601088B (en) | 2018-10-12 |
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| CN201611186313.6A Active CN106601088B (en) | 2016-12-20 | 2016-12-20 | A kind of centripetal force demonstration apparatus |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269468B (en) * | 2018-01-22 | 2020-10-23 | 呼伦贝尔学院 | Physical mechanics display model |
| CN109523874B (en) * | 2018-10-29 | 2020-12-18 | 浙江如裕纺织科技股份有限公司 | Experimental device for measuring and calculating centripetal force of middle school physics |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056536U (en) * | 1989-08-08 | 1990-04-25 | 唐定山 | Demonstrator for centripetal force |
| GR1004994B (en) * | 2005-01-07 | 2005-09-16 | Δημητριος Τσαουσης | Device for the study of the angular momentum and the calculation of the centripetal force work |
| CN201000682Y (en) * | 2007-01-17 | 2008-01-02 | 天津市海河中学 | Circular motion research instrument |
| CN201402545Y (en) * | 2009-04-30 | 2010-02-10 | 何金营 | Novel centripetal force exploration instrument |
| CN201886671U (en) * | 2010-12-06 | 2011-06-29 | 湖州师范学院 | Simple centripetal force experimental apparatus |
| CN205122035U (en) * | 2015-11-24 | 2016-03-30 | 赖艳清 | Centripetal force experiment teaching demonstration appearance |
-
2016
- 2016-12-20 CN CN201611186313.6A patent/CN106601088B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056536U (en) * | 1989-08-08 | 1990-04-25 | 唐定山 | Demonstrator for centripetal force |
| GR1004994B (en) * | 2005-01-07 | 2005-09-16 | Δημητριος Τσαουσης | Device for the study of the angular momentum and the calculation of the centripetal force work |
| CN201000682Y (en) * | 2007-01-17 | 2008-01-02 | 天津市海河中学 | Circular motion research instrument |
| CN201402545Y (en) * | 2009-04-30 | 2010-02-10 | 何金营 | Novel centripetal force exploration instrument |
| CN201886671U (en) * | 2010-12-06 | 2011-06-29 | 湖州师范学院 | Simple centripetal force experimental apparatus |
| CN205122035U (en) * | 2015-11-24 | 2016-03-30 | 赖艳清 | Centripetal force experiment teaching demonstration appearance |
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| CN106601088A (en) | 2017-04-26 |
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