CN103578330B - Friction force exploring instrument - Google Patents
Friction force exploring instrument Download PDFInfo
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- CN103578330B CN103578330B CN201210269567.XA CN201210269567A CN103578330B CN 103578330 B CN103578330 B CN 103578330B CN 201210269567 A CN201210269567 A CN 201210269567A CN 103578330 B CN103578330 B CN 103578330B
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- instrument
- friction
- dynamometer
- small machine
- friction force
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Abstract
Patent of the present invention relates to a kind of instruments used for education, is specially a kind of friction force demonstration instrument; Solve in existing friction force instrument and demonstrate stiction without capable instrument and design unscientific problem; Comprise casing, cover plate and support (drop handle); Device removable cover above casing, removable cover has the bayonet socket of device rubbing surface, and rubbing surface is divided into smooth, thick hot-tempered two sides; Below bayonet socket, device travelling belt, is driven by reduction gearing by small machine; Bayonet socket one end device two panels elasticity power supply contact and circuit check switch, instrument box frontside devices quiet, dynamic two switches, circuit check pilot lamp and travelling belt speed-regulating switch, power input jack.The panel that on cover plate, device is smooth is for dynamometer support-moving, and on dynamometer support, device has memory vernier, light emitting diode and lifting assembly; Drive device jaw clutch and traction sheave on small machine axle; Friction block frontside devices two circle rolls, after have power supply contact.
Description
Technical field
The present invention relates to a kind of instruments used for education, be specially a kind of friction force exploring instrument.
Background technology
The relevant friction force content of courses in physics lesson, 1, there is no the instrument probing into demonstration stiction factor in existing instrument visual in imagely, make experimental teaching very difficult, the probing into and test of stiction becomes the difficulties in teaching of Physical Education Teacher's headache the most; 2, existing instrument hand twist method drawing friction block, cannot grasp the pulling force of horizontal direction and the science requirements of uniform motion two aspect; 3, existing instrument is visual poor, and student does not see the change of data on dynamometer from afar at all.The defect of existing instrumental function, becomes problem demanding prompt solution.
Summary of the invention
Many defects that the present invention exists to solve existing friction force experimental apparatus, provide a kind of friction force exploring instrument.
The present invention is with its novel unique design, and what make to affect stiction each side factor has probed into capable instrument, compensate for the defect of existing instrument, makes the science of experiment tighter; Add the visuality of experiment simultaneously, and design memory function, can contrast experiment be carried out; A multi-purpose instrument, can be rated as " treasure case "; This instrument is used can the whole factors affecting friction force size to be carried out to omnibearing experiment and be probed into: the relation comprising stiction, activity friction force, force of rolling friction, bevel friction power, speed of moving body and friction force; Make that experimental teaching is visual in image, vivid and interesting.Excite students ' interest of study greatly, mobilizing students learning initiative.
The present invention adopts following technical scheme to realize:
A kind of friction force exploring instrument, comprise instrument box, instrument upper cover plate, instrument upper cover plate has draw ring, draw ring is the support of instrument upper cover plate simultaneously, and instrument upper cover plate can be made to become horizontality with instrument box; Instrument upper cover plate device supplies the smooth panel of dynamometer support-moving, the bayonet socket of panel right-hand member device fixed traction small machine, and this bayonet socket is the power contact of traction small machine simultaneously; The removable cover that above instrument box, device can be uncovered, there are the notch that can embed rubbing surface in removable cover central authorities, and the smooth reverse side in rubbing surface front is coarse; The right-hand member of removable cover is the same with the right-hand member of instrument upper cover plate, and also device has traction small machine bayonet socket, and this bayonet socket is also the power contact of traction small machine simultaneously; The left end installation's power source elastic contact blade above of instrument box, returning apparatus static friction experimental check switch; The travelling belt that in notch below rubbing surface, device is driven by another traction small machine; The previous one of instrument box has instrument master cock, is stiction experiment switch respectively, slides/rolls friction force experiment switch, travelling belt speed-regulating switch; Returning apparatus has stiction to test pilot lamp and power input jack; Ergometer arrangement is on lifting type support, and on dynamometer support base plate, device has the assembly that dynamometer can be made to be elevated, and this assembly is made up of known bolt slot and bolt; On 0 degree of groove of dynamometer, device fixes green LED, and on the pointer of spring, the movable red light emitting diodes of device, can increase the visuality of experiment; Device vernier scale and vernier above dynamometer, vernier is adsorbed on irony vernier scale by small magnet, is convenient to the data of last experiment; There are battery case and P cock in the back side of dynamometer; On friction block, install the rod that rolls flexibly, make friction block movablely test dual-purpose with force of rolling friction; At the installation's power source contact of below below of friction block, with the power supply elastic contact blade above instrument box with the use of, carry out the experimental demonstration of stiction.The rotating shaft of traction small machine there is clutch shifter, with the slot fit in traction rope wheel, playing the clutch coupling effect be separated with combining, being convenient to experimental implementation.
The inquiry experiment that the present invention can do is as follows:
(1) static friction force exploring experiment; (2) size of normal pressure is on the inquiry experiment of the impact of friction force size; (3) degree of roughness of body surface is on the inquiry experiment of the impact of friction force size; (4) object contact size is on the inquiry experiment of the impact of friction force size; (5) contrast experiment of activity friction force and force of rolling friction; (6) inquiry experiment of speed of moving body and friction force relation.(7) inquiry experiment of bevel friction.
Accompanying drawing explanation
The front plan view of Fig. 1 instrument box of the present invention;
Fig. 2 is annex lift dynamometer supporting structure schematic diagram;
Fig. 3 is the friction block structural representation of repacking;
Fig. 4 is annex disengaging type traction small machine modular construction schematic diagram.
Fig. 1 is apparatus subject, in figure: 1, friction force experimental circuit check valve; 2, elasticity power supply contact; 3, rubbing surface board slot mouth; 4, travelling belt; 5, small machine bayonet socket and 2 power contacts are drawn; 6, dynamometer support-moving panel; 7, the second traction small machine bayonet socket and power contact; 8, upper cover plate drop handle (being also upper cover plate support) 9, upper cover plate; 10 outlets; 11, travelling belt speed-regulating switch; 12, instrument box; 13, stiction demonstration switch; 14, movable, force of rolling friction demonstration switch; 15, circuit check pilot lamp; 16 friction panels (one-sided smooth, one side is coarse).
Fig. 2 is instrument annex-lift dynamometer supporting structure front plan view.In figure: 1, traction rope drag hook; 2, vernier; 3, vernier scale; 4, red light emitting diodes; 5, dynamometer draw ring; 6, dynamometer lifting assembly; 7, green LED; 8, bracket base; 9, dynamometer.
Fig. 3 is the friction block front plan view of repacking.In figure: 1 power supply contact; 2, roll rod; 3, friction block; 4, counterweight hole.
Fig. 4 is traction small machine structural representation.In figure: 1, draw small machine; 2, traction rope wheel; 3, small machine rotating shaft; 4, clutch shifter.
Embodiment,
A kind of friction force exploring instrument, comprise instrument box (12), instrument upper cover plate (9), instrument upper cover plate has draw ring (8), draw ring is the support of instrument upper cover plate simultaneously, and instrument upper cover plate can be made to become horizontality with instrument box; On instrument upper cover plate, device has the smooth panel (9) for dynamometer support-moving, the bayonet socket (7) of this panel right-hand member device fixed traction small machine, and this bayonet socket is the power contact of traction small machine simultaneously; The removable cover that instrument box (12) top device can be uncovered, there are rubbing surface notch (3) in removable cover central authorities, and in order to device rubbing surface (16) in this notch, the smooth reverse side in rubbing surface front is coarse; The right-hand member device of removable cover has traction small machine bayonet socket (5) and bayonet socket to be the power contacts drawing small machine simultaneously; The left end installation's power source elastic contact blade (2) of instrument box (12), returning apparatus electricity stiction experimental check switch (1); The travelling belt (4) that in rubbing surface notch, device is driven by another traction small machine; The previous one of instrument box has stiction to test switch (13), slides/rolls friction force experiment switch (14) and stiction experimental circuit check indicator (15) and travelling belt speed-regulating switch (11) and outlet (10); Ergometer arrangement is on lifting type support, and dynamometer support base plate (8) goes up the assembly (6) that device can make dynamometer be elevated, and this assembly is made up of known bolt slot and bolt; On 0 degree of groove of dynamometer (9), device fixes green LED (7), and movable red light emitting diodes (4), can increase the visuality of experiment; Device vernier scale (3) and vernier (2) above dynamometer, vernier is adsorbed on irony vernier scale by small magnet, moves the data that it is convenient to last experiment; The back side returning apparatus of dynamometer has battery case and P cock; On friction block, install the rod (2) that rolls flexibly additional, make friction block movablely test dual-purpose with force of rolling friction; At the installation's power source contact of below below of friction block, with the power supply elastic contact blade (2) above instrument box with the use of, carry out the experimental demonstration of stiction.The rotating shaft of traction small machine there is clutch shifter (4), with the slot fit in traction rope wheel (2), playing the clutch coupling effect be separated with combining, being convenient to experimental implementation.
The present invention is adopted to carry out following inquiry experiment:
The inquiry experiment of experiment one, stiction
Open instrument box upper cover plate, prop up into horizontality with the drop handle on upper cover plate with above casing backward, traction electric machine assembly Figure is entered in the small machine bayonet socket of cover panel end, loosens the clutch, traction rope is pulled out and hooks the draw ring of dynamometer component.Again friction block is against lightly on the elasticity power supply contact of instrument box one end, make small machine circuit ON, click the friction force experimental circuit check valve on power supply contact side, LED lighting, confirm that circuit is logical, afterwards, open dynamometer indicator light switch, diode is shinny, close clutch coupling, press stiction demonstration switch, traction electric machine starts to rotate, pull dynamometer support and draw friction block and move, when the pulling force of horizontal direction overcomes maximum static friction force, friction block starts mobile, leave power supply contact, circuit disconnects, motor is stall at once, reading now on dynamometer is stiction data.Vernier arrow above mobile dynamometer pointer, the data of memory experiment.
Affect probing into of stiction size factor, following two groups of experiments can be done:
1, increase or reduce the counterweight above friction block, testing.Probe into the size of normal pressure to the impact of stiction size.
2, normal pressure is constant, uses the front and back of friction panel to test, probes into the degree of roughness in object contact face to the impact of stiction size.
The demonstration of experiment two, force of sliding friction,
By lower slider, force of rolling friction experiment switch, traction electric machine just pulls dynamometer support and draws friction block and moves on rubbing surface, and force of sliding friction also can carry out the demonstration of following friction force factor and probe into:
1, the inquiry experiment of friction force size and rubbing surface smooth degree.
First from the one side experiment that panel front is smooth, then test from the another side that back side of panel is coarse.The surface of contact degree of roughness of object is probed on the impact of force of sliding friction size by contrast experiment.
2, the experiment of friction force size and normal pressure relation.
Increase or reduce counterweight on friction block, by contrast experiment, probing into the size of normal pressure to the impact of force of sliding friction size.
3, the inquiry experiment of friction force size and object contact size relation.
The experiment that object contact area is little, can just hold up by friction block, dynamometer is raised and makes stay cord become level, test.
The experiment that object contact area is large: kept flat by friction block, reduces dynamometer and makes stay cord become level, test.
Experiment three: the inquiry experiment of force of rolling friction
Turned over by friction block, the little roller contact friction face of reverse side device is rotated and carries out experimental demonstration, it is right the experimental data of force of sliding friction and force of rolling friction to be carried out, draw rolling friction force rate force of sliding friction laborsaving many conclusion.
Experiment four: the relation demonstration of friction force size and speed of moving body speed is tested.
Take down friction panel, friction block is placed in travelling belt, opens motor speed-regulating switch, line speed is repeatedly regulated to carry out inquiry experiment, by vernier record experimental result, by experiment, can the conclusion that has nothing to do with speed of moving body speed of the nature size that draws friction force.
Experiment five: the lecture experiment of bevel friction power
Traction electric machine assembly is loaded in the traction electric machine bayonet socket on the removable cover on instrument box, tension meter and friction block, uncover cover plate, constantly adjust surface slope with support bar below, repeatedly inquiry experiment, make student's profound understanding: along with the continuous increase of the gradient, normal pressure can constantly reduce, simultaneously friction force also ever-reduced principle.If inclined-plane becomes 90 degree, friction force will be lost completely.
Claims (4)
1. a friction force exploring instrument, comprises instrument box, instrument upper cover plate, and instrument upper cover plate has draw ring, and draw ring is the support of instrument upper cover plate simultaneously, and instrument upper cover plate can be made to become horizontality with instrument box; On instrument upper cover plate, device is for the smooth panel of dynamometer support-moving, the bayonet socket of the right-hand member device fixed traction small machine of this panel, and this bayonet socket is the power contact of traction small machine simultaneously; The removable cover that above instrument box, device can be uncovered, there are rubbing surface notch in removable cover central authorities, and in order to device rubbing surface in this notch, the smooth reverse side in rubbing surface front is coarse; The right-hand member device of removable cover has traction small machine bayonet socket, and the traction small machine bayonet socket of removable cover right-hand member is also the power contact of traction small machine; The left end device elasticity power supply contact of instrument box, returning apparatus static friction experimental circuit check valve; The travelling belt that in notch below rubbing surface, device is driven by another traction small machine; The previous one of instrument box has stiction to test switch, slides/rolls friction force experiment switch and stiction experimental circuit check indicator and travelling belt speed-regulating switch and power input jack.
2. friction force exploring instrument according to claim 1, is characterized in that Ergometer arrangement is on lifting type support, the assembly that on dynamometer support base plate, device can make dynamometer be elevated, and this assembly is made up of known bolt slot and bolt; On 0 degree of groove of dynamometer, device fixes green LED, and the movable red light emitting diodes of device on the pointer of spring, in order to increase the visuality of experiment; Device vernier scale and vernier above dynamometer, vernier is adsorbed on irony vernier scale by small magnet, and be convenient to the data of last experiment, there are battery case and P cock in the back side of dynamometer.
3. friction force exploring instrument according to claim 1, is characterized in that on friction block, install the rod that rolls flexibly additional, and friction block realization activity and force of rolling friction can be made to test dual-purpose; At the installation's power source contact of below below of friction block, with the elasticity power supply contact above instrument box with the use of, carry out the experimental demonstration of stiction.
4. friction force exploring instrument according to claim 1, is characterized in that the rotating shaft of traction small machine has clutch shifter, with the slot fit in traction rope wheel, playing the clutch coupling effect be separated with combining, being convenient to experimental implementation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210269567.XA CN103578330B (en) | 2012-07-27 | 2012-07-27 | Friction force exploring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210269567.XA CN103578330B (en) | 2012-07-27 | 2012-07-27 | Friction force exploring instrument |
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| Publication Number | Publication Date |
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| CN103578330A CN103578330A (en) | 2014-02-12 |
| CN103578330B true CN103578330B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210269567.XA Expired - Fee Related CN103578330B (en) | 2012-07-27 | 2012-07-27 | Friction force exploring instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108022484B (en) * | 2017-12-22 | 2019-10-22 | 赵耀 | A kind of Physical Experiment friction force demonstration device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069147U (en) * | 1989-10-20 | 1991-01-09 | 余宙明 | Experimental instrument for overload and weightlessness by magnetic memory |
| CN2373854Y (en) * | 1999-06-08 | 2000-04-12 | 王兆军 | Combined type mechanics demonstration platform |
| CN1547176A (en) * | 2003-12-11 | 2004-11-17 | 彤 李 | Static and kinetic friction demonstrator |
| CN2775775Y (en) * | 2005-01-28 | 2006-04-26 | 杜丽娟 | Friction test teaching demonstration instrument |
| JP2009192916A (en) * | 2008-02-15 | 2009-08-27 | Univ Of Fukui | Experimental apparatus of physics |
| CN201796526U (en) * | 2010-09-30 | 2011-04-13 | 郭茂清 | Multifunctional frictional force demonstrating apparatus |
| CN202126782U (en) * | 2011-07-21 | 2012-01-25 | 杨华平 | Frictional force demonstrating device |
-
2012
- 2012-07-27 CN CN201210269567.XA patent/CN103578330B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069147U (en) * | 1989-10-20 | 1991-01-09 | 余宙明 | Experimental instrument for overload and weightlessness by magnetic memory |
| CN2373854Y (en) * | 1999-06-08 | 2000-04-12 | 王兆军 | Combined type mechanics demonstration platform |
| CN1547176A (en) * | 2003-12-11 | 2004-11-17 | 彤 李 | Static and kinetic friction demonstrator |
| CN2775775Y (en) * | 2005-01-28 | 2006-04-26 | 杜丽娟 | Friction test teaching demonstration instrument |
| JP2009192916A (en) * | 2008-02-15 | 2009-08-27 | Univ Of Fukui | Experimental apparatus of physics |
| CN201796526U (en) * | 2010-09-30 | 2011-04-13 | 郭茂清 | Multifunctional frictional force demonstrating apparatus |
| CN202126782U (en) * | 2011-07-21 | 2012-01-25 | 杨华平 | Frictional force demonstrating device |
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| CN103578330A (en) | 2014-02-12 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guan Jianquan Inventor before: Guo Maoqing |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180129 Address after: Dali Baiyun District of Guangzhou City, Guangdong province 510540 Zhuang village two European Lane No. 2 first floor Patentee after: Guangzhou Guang Chuang instrument and Equipment Co., Ltd. Address before: 031800 Shanxi East Yushe County Street No. 20 middle school of Yushe Patentee before: Guo Maoqing |
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| 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: 20160120 Termination date: 20190727 |