CN103578330A - All-purpose friction force exploration instrument - Google Patents
All-purpose friction force exploration instrument Download PDFInfo
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- CN103578330A CN103578330A CN201210269567.XA CN201210269567A CN103578330A CN 103578330 A CN103578330 A CN 103578330A CN 201210269567 A CN201210269567 A CN 201210269567A CN 103578330 A CN103578330 A CN 103578330A
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- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000002474 experimental method Methods 0.000 claims description 48
- 238000005096 rolling process Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000001808 coupling effect Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000012795 verification Methods 0.000 abstract 2
- 235000012431 wafers Nutrition 0.000 abstract 2
- 239000000523 sample Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012857 repacking Methods 0.000 description 2
- 206010019233 Headaches Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 230000001483 mobilizing effect Effects 0.000 description 1
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Abstract
The invention relates to a teaching instrument, in particular to an all-purpose friction force demonstration instrument to solve the problems that an existing friction force instrument is not provided with an effective instrument to demonstrate static friction force and the design of the existing friction force instrument is unscientific. An all-purpose friction force exploration instrument comprises a box body, a cover plate and a support, namely, a lifting ring, wherein a second movable cover plate is arranged above the box body, a clamping opening provided with friction faces is formed in the cover plate, and the friction faces include the smooth face and the rough face. A conveying belt is arranged below the clamping opening and driven by a small motor through reduction gears. Two elastic power wafers and a circuit verification switch are arranged at one end of the clamping opening, and a fixed switch, a movable switch, a power verification indication lamp, a conveying belt speed regulation switch and a power input socket are arranged on the front face of the instrument box body. A smooth panel on which a dynamometer support can move is arranged on the cover plate, the dynamometer support is provided with a memory cursor, a light-emitting diode and a lifting assembly, and a small drive motor drives a traction rope wheel through a jaw type clutch. Two circular rollers are arranged on the front face of a friction block, and a power wafer is arranged on the back face of the friction block. The all-purpose friction force exploration instrument is high in functionality and enjoyment and has very good application and popularization value.
Description
Technical field
The utility model relates to a kind of instruments used for education, is specially a kind of omnipotent friction force exploring instrument.
Background technology
The relevant friction force content of courses in physics lesson, 1, there is no to probe into the instrument of demonstration stiction factor in existing instrument visual in imagely, make experimental teaching very difficult, the probing into and test of stiction becomes Physical Education Teacher's difficulties in teaching of headache the most.2, hand twist method drawing friction piece for existing instrument, cannot grasp the pulling force of horizontal direction and the science requirements of uniform motion two aspects, and 3, existing instrument is visual poor, student does not see the variation of data on dynamometer from afar at all.The shortage of existing instrumental function and defect, become problem demanding prompt solution.
Summary of the invention
The present invention probes into shortage and the defect of experimental apparatus in order to solve friction force factor, a kind of omnipotent friction force exploring instrument is provided.
The present invention, with its novel unique design, fills up the blank of national instrument, and stiction can be demonstrated and be probed into because have terrible power instrument.Make up the defect of existing instrument, make the science of experiment tighter.Increase the visuality of experiment simultaneously, and designed memory function.A multi-purpose instrument, can be rated as " treasure case ".Using this instrument can affect the whole factors of friction force carries out omnibearing experiment and probes into (relation that comprises 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 greatly students ' interest of study, mobilizing students learning initiative,
The present invention adopts following technical scheme to realize: omnipotent friction force demonstration instrument, comprise instrument box, and instrument upper cover plate, has draw ring on instrument upper cover plate, and draw ring is the support of cover plate simultaneously, makes cover plate and instrument box level.On 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 bayonet socket is the power supply input contact of small machine simultaneously.Instrument box top device removable cover, there is rubbing surface board mouth in cover plate central authorities, and in bayonet socket, in order to device friction panel, friction panel is divided into smooth and coarse two sides.Bayonet socket right-hand member device the second small machine bayonet socket (being simultaneously power contact).Left end installation's power source elastic contact blade and static friction experimental circuit check valve, the travelling belt that in rubbing surface bayonet socket, device is driven by traction small machine.The device above of instrument box has stiction experiment switch; Slip, force of rolling friction experiment switch; Stiction experimental circuit check indicator.And travelling belt speed-regulating switch and power supply input socket.The annex of omnipotent friction force exploring instrument comprises: 1, on lift force-measuring support, dynamometer support base plate, install the assembly that can make dynamometer lifting, assembly is comprised of known bolt loose slot and bolt.0 degree graduating device of dynamometer is green LED and movable red light emitting diodes fixedly, is used for increasing the visuality of experiment.Dynamometer top device vernier scale and vernier, be convenient to remember the data of testing last time, tests contrast.2, improved friction block: install the rod that rolls flexibly additional on friction block, make the activity of friction block energy, force of rolling friction test dual-purpose.Installation's power source contact below after friction block, is used in conjunction with the power supply elastic contact blade of instrument box top, carries out the experimental demonstration (this innovative point is readily solved static friction force exploring experiment difficulty) of stiction.3, the present invention has changed the original method with hand twist traction friction block, uses the hitch structure being matched with reduction gearing by small machine instead.In the rotating shaft of traction small machine, there is clutch shifter, coordinate with the groove in traction rope wheel, play clutch coupling effect separated and combination, be convenient to experimental implementation.
Why omnipotent friction force exploring instrument is because can carry out omnibearingly probing into and testing on affecting all factors of friction force size with it titled with " omnipotent ".Can do probe into experiment as follows:
(1) static friction force exploring experiment; (2) the probe into experiment of the size of normal pressure on the impact of friction force size; (3) the probe into experiment of the degree of roughness of body surface on the impact of friction force size; (4) the probe into experiment of object contact size on the impact of friction force size; (5) contrast experiment of activity friction force and force of rolling friction; (6) speed of moving body and friction force relation probes into experiment.(7) bevel friction probes into experiment.
Accompanying drawing explanation
The vertical 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 annex repacking;
Fig. 4 is annex disengaging type traction small machine modular construction schematic diagram.
Fig. 1 is apparatus subject, in figure: 1, stiction experimental circuit check valve; 2, elasticity power supply contact; 3, rubbing surface board mouth; 4, travelling belt; 5, the first traction small machine bayonet socket (power contact); 6, dynamometer support-moving panel.7, the second traction small machine bayonet socket (power contact); 8, upper cover plate drop handle (support) 9, upper cover plate; 10, upper cover plate; 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 support.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 vertical view of repacking.In figure: 1 power supply contact; 2, rolling rod; 3, friction block; 4, counterweight hole.
Fig. 4 is traction small machine structural representation.In figure: 1, traction small machine; 2, traction rope wheel; 3, small machine rotating shaft; 5, clutch shifter.
Embodiment
Omnipotent friction force exploring instrument comprises instrument box (12), instrument upper cover plate (9), and the draw ring on instrument upper cover plate (8) is the support of cover plate simultaneously, makes cover plate and instrument box level.The smooth panel (9) that on cover plate, device moves for dynamometer support (Fig. 2), the bayonet socket (7) of panel right-hand member device fixed traction small machine (Fig. 4), bayonet socket is the power supply input contact of small machine simultaneously.The removable cover that instrument box (12) top device can be uncovered, there is rubbing surface board mouth (3) in cover plate central authorities, and in bayonet socket, in order to device friction panel (16), friction panel is divided into smooth and coarse two sides.Bayonet socket right-hand member device small machine bayonet socket (5) (power contact), left end installation's power source elastic contact blade (2), with timer static friction experimental circuit check valve (1), the travelling belt (4) that in rubbing surface bayonet socket, device is driven by traction small machine (Fig. 4).The device above of instrument box has stiction experiment switch (13), slip, force of rolling friction experiment switch (14), stiction experimental circuit check indicator (15).And travelling belt speed-regulating switch (11) and outlet (10).
The annex of omnipotent friction force exploring instrument comprises: one, lift force-measuring support (Fig. 2).The upper device of dynamometer support base plate (8) can make the assembly (6) of dynamometer lifting, and assembly is comprised of known bolt slot and bolt.The fixing green LED (7) of device on 0 degree groove of dynamometer (9), and movable red light emitting diodes (4), can increase the visuality of experiment.Dynamometer top device vernier scale (3) and vernier (2), be convenient to remember the data of testing last time.Two, on friction block (Fig. 3-3), install flexibly the rod (2) that rolls additional, make friction block can be movable, roll experiment is dual-purpose.Installation's power source contact (1) below after friction block, is used in conjunction with the power supply elastic contact blade (2) of instrument box top, carries out the experimental demonstration of stiction.Three, the traction small machine (Fig. 4-1) of device clutch coupling: have clutch shifter (4) in its rotating shaft, coordinate with the groove in traction rope wheel (2), play clutch coupling effect separated and combination, be convenient to experimental implementation.
Adopt the present invention can carry out the following experiment of probing into:
Experiment one, stiction probe into experiment
Open instrument box upper cover plate, with the drop handle on upper cover plate, prop up into horizontal direction with casing top backward, traction electric machine assembly Figure is entered in the small machine bayonet socket (power contact) of cover panel end, loosen the clutch, pulls out traction rope hook the draw ring of dynamometer component.Again friction block is against lightly on the elasticity power supply contact of instrument box one end, small machine circuit is connected, (click the circuit check switch on power supply contact side, LED lighting, confirm that circuit is logical) afterwards, open dynamometer indicator light switch, diode is shinny.Clutch coupling closes, 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 has overcome stiction, friction block starts to move, and leaves power supply contact, and circuit disconnects, motor is stall at once, and now the reading on dynamometer is stiction data.The vernier arrow of mobile dynamometer pointer top, the Data Position of memory experiment.
Affect probing into of stiction size factor, can do following two groups of experiments:
1, increase or reduce the counterweight above friction block, testing.The impact of the size of probing into normal pressure on stiction size.
2, normal pressure is constant, uses the front and back of friction panel to test, the impact of the degree of roughness of probing into object contact face on stiction size.
The demonstration of experiment two, force of sliding friction,
By lower slider (rolling) friction force switch, traction electric machine just pulls dynamometer support and friction block to move on rubbing surface, and force of sliding friction also can carry out the demonstration of following friction force factor and probe into:
1, the experiment of probing into of friction force size and rubbing surface smooth degree.
First from the smooth one side experiment of panel front, then from the coarse another side experiment of back side of panel.The impact of the surface of contact degree of roughness of probing into object by contrast experiment on force of sliding friction size.
2, the experiment of friction force size and normal pressure relation.
Increase or reduce counterweight on friction block, by contrast experiment, the impact of the size of probing into normal pressure on force of sliding friction size.
3, the experiment of probing into of friction force size and object contact size relation.
The experiment that object contact area is little: friction block is holded up, dynamometer is raise and makes stay cord become level, test.
The experiment that object contact area is large: friction block is kept flat, dynamometer is reduced and makes stay cord become level, test.
Can draw by experiment the conclusion that friction force size and object contact area are irrelevant.
Experiment three: force of rolling friction probe into experiment
Friction block is turned over, make the little roller contact friction face rotation of reverse side device carry out experimental demonstration.It is right that the experimental data of force of sliding friction and force of rolling friction is carried out, draw rolling friction force rate force of sliding friction laborsaving many conclusions.
Experiment four: friction force size is tested with the relation demonstration of speed of moving body speed.
Take down friction panel, friction block is placed in travelling belt, open motor speed-regulating switch, repeatedly regulate line speed to probe into experiment, with vernier, record experimental result, by experiment, can nature draw the conclusion that the size of friction force and speed of moving body speed are irrelevant.
Experiment five: the lecture experiment of bevel friction power
Traction electric machine assembly is loaded in the motor bayonet socket on the second upper cover plate on instrument box, tension meter and friction block, uncover cover plate, with support bar below, constantly adjust surface slope, repeatedly probe into experiment, make student's profound understanding: along with the continuous increase of the gradient, normal pressure can constantly reduce, and while friction force is ever-reduced principle also.(inclined-plane becomes 90 degree, and friction force is kept to 0).
In sum: it is blank that patent of the present invention is not only filled up national instrument, make up existing instrument not enough, and it is comprehensive, functional and interestingly all make existing friction force instrument too far behind to catch up.There are very large practical value and promotional value.
Claims (4)
1. an omnipotent friction force exploring instrument, comprises instrument box (12), instrument upper cover plate (9), and the draw ring on instrument upper cover plate (8) is the support of cover plate simultaneously, makes cover plate and instrument box level.The smooth panel (9) that on cover plate, device moves for dynamometer support (Fig. 2), the bayonet socket (7) of panel right-hand member device fixed traction small machine (Fig. 4), bayonet socket is the power supply input contact of small machine simultaneously.The removable cover that instrument box (12) top device can be uncovered, there is rubbing surface bayonet socket (3) in cover plate central authorities, and in bayonet socket, in order to install rubbing surface (16), rubbing surface is divided into smooth and coarse two sides.Bayonet socket right-hand member device small machine bayonet socket (5) (power contact), left end installation's power source elastic contact blade (2), with timer static friction experimental circuit check valve (1), the travelling belt (4) that in rubbing surface bayonet socket, device is driven by traction small machine (Fig. 4).The device above of instrument box has stiction experiment switch (13), slip, force of rolling friction experiment switch (14), stiction experimental circuit check indicator (15).And travelling belt speed-regulating switch (11) and outlet (10).
2. omnipotent friction force exploring instrument according to claim 1, is characterized in that dynamometer device is on lifting type support (Fig. 2).The upper device of dynamometer support base plate (8) can make the assembly (6) of dynamometer lifting, and assembly is comprised of known spiral shell bolt slot and bolt.0 degree groove orientation device of dynamometer (9) is green LED (7) fixedly, and movable red light emitting diodes (4), can increase the visuality of experiment.Dynamometer top device vernier scale, (3) and vernier (2), vernier is firmly adsorbed on irony vernier scale by small magnet, is convenient to remember the data of experiment last time.There are battery case and P cock (figure slightly) in the back side of dynamometer
3. omnipotent friction force exploring instrument according to claim 1, is characterized in that installing additional on friction block (Fig. 3-3) rod (2) that rolls flexibly, makes friction block activity friction force and force of rolling friction experiment dual-purpose.Installation's power source contact below after friction block, is used in conjunction with the power supply elastic contact blade (2) of instrument box top, carries out the experimental demonstration of stiction.
4. omnipotent friction force exploring instrument according to claim 1, it is characterized in that drawing in small machine (Fig. 4-1) rotating shaft and have clutch shifter (4), coordinate with the groove in traction rope wheel (2), play clutch coupling effect separated and combination, be convenient to experimental implementation.
In sum: it is blank that patent of the present invention is not only filled up national instrument, make up existing instrument not enough, and it is comprehensive, functional and interestingly all make existing friction force instrument too far behind to catch up.There are very large practical value and promotional value.
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 true CN103578330A (en) | 2014-02-12 |
| CN103578330B CN103578330B (en) | 2016-01-20 |
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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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022484A (en) * | 2017-12-22 | 2018-05-11 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108022484A (en) * | 2017-12-22 | 2018-05-11 | 赵耀 | A kind of Physical Experiment friction force demonstration device |
| CN108022484B (en) * | 2017-12-22 | 2019-10-22 | 赵耀 | A kind of Physical Experiment friction force demonstration device |
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| CN103578330B (en) | 2016-01-20 |
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| C14 | Grant of patent or utility model | ||
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Inventor after: Guan Jianquan Inventor before: Guo Maoqing |
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| 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 | ||
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Granted publication date: 20160120 Termination date: 20190727 |