CN107749222A - A kind of maximum static friction force demonstrator - Google Patents
A kind of maximum static friction force demonstrator Download PDFInfo
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- CN107749222A CN107749222A CN201711350771.3A CN201711350771A CN107749222A CN 107749222 A CN107749222 A CN 107749222A CN 201711350771 A CN201711350771 A CN 201711350771A CN 107749222 A CN107749222 A CN 107749222A
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- strip gab
- peak value
- static friction
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- 230000003068 static effect Effects 0.000 title claims abstract description 32
- 238000002474 experimental method Methods 0.000 claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 230000011514 reflex Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000003562 lightweight material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009975 flexible effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
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- Business, Economics & Management (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of maximum static friction force demonstrator, including horizontally disposed experiment porch, the supporting table for fixed spring dynamometer is integrally formed with the left end of experiment porch, motor is fixed with the right-hand member of experiment porch, on experiment porch slide plate is moved equipped with the bar shaped set in left-right direction, moved in bar shaped and be furnished with sliding block on slide plate, weight beam is connected by the first bracing wire with sliding block left end, motor is connected by the second bracing wire with bar shaped slide plate right-hand member, the left positioning end extended to the right after the right-hand member of sliding block is integrally formed with elder generation upwards, the right positioning end extended to the left after the right-hand member of bar shaped slide plate is integrally formed with elder generation upwards, lightweight thing block is placed between left positioning end and right positioning end, when sliding block and bar shaped slide plate relative motion, lightweight thing block drops on bar shaped slide plate.
Description
Technical field
The invention belongs to experiment device for teaching technical field, and in particular to a kind of maximum static friction force demonstrator.
Background technology
Stiction lecture experiment is an important knowledge point in senior middle school physics teaching, and the increase of stiction has one
Limit, the maximum of stictionF maxBe numerically equal to object just setting in motion when pulling force, actually occur between two articles
Stiction F in 0 and maximum static friction forceF maxBetween, i.e. 0 ＜ F≤F max。
When testing, generally use weight beam hooks a wooden unit, then by weight beam in parallel desktop
At the uniform velocity moved on direction, according to balance between two forces knowledge, frictional force can be observed by weight beam indicating value size in student
Situation of change, in experimentation, one is due to the moment that wooden unit starts to slide to turn to slip by maximum static friction force change to rub
The moment of power is wiped without foreseeability, student is not easy to observe；Second, after weight beam used in experiment is shown to peak-peak
Pop-off, student are even more to be not easy to observe, therefore, whole experiment student is can not to be visually observed that very much maximum static friction
Power, experiment effect is bad.
The content of the invention
The present invention seeks to propose a kind of maximum static friction force for the above-mentioned problems of the prior art of solution to drill
Show instrument, applied in maximum static friction force lecture experiment, maximum static friction force value can be locked, so as to more directly perceived
Ground reads maximum static friction force, is adopted the technical scheme that to reach above-mentioned purpose：
A kind of maximum static friction force demonstrator, including horizontally disposed experiment porch, in the left end one of experiment porch
Provided with the supporting table for fixed spring dynamometer, motor is fixed with the right-hand member of experiment porch, is furnished with edge on experiment porch
Slide plate is moved in the bar shaped that left and right directions is set, and is moved in bar shaped and is furnished with sliding block on slide plate, weight beam passes through the first bracing wire and sliding block
Left end is connected, and motor is connected by the second bracing wire with bar shaped slide plate right-hand member, after the right-hand member of sliding block is integrally formed with elder generation upwards to the right
The left positioning end of extension, the right positioning end extended to the left after the right-hand member of bar shaped slide plate is integrally formed with elder generation upwards, in left positioning end
Lightweight thing block is placed between right positioning end, lightweight thing block drops in bar shaped slide plate when sliding block and bar shaped slide plate relative motion
On.
Preferably, multiple counterweight circular grooves for being used to place counterweight are provided with sliding block.
Preferably, three regulating bolts for being used for adjusting experiment porch levelness are provided with experiment porch, it is flat in experiment
Platform is provided with air level.
Preferably, weight beam includes shell, and link is fixed with the top of shell, and the outer casing frontispiece is plane,
The strip gab vertically set is provided among outer casing frontispiece, force value is provided with the left side of strip gab and/or right side
Graduated scale, the spring set along strip gab being installed in shell, the top of the spring is fixed on inner surface of outer cover,
The bottom of spring is fixed with connecting rod, and the free end of connecting rod is stretched out outside outer casing bottom and is fixed with hook；Characterized in that, even
Bar and spring bottom end junction are fixed with force value pointer, and being provided with the left bar shaped parallel with strip gab in the left side of strip gab slides
Hole, the right bar shaped slide opening parallel with strip gab is provided with the right side of strip gab, peak value pointer, the peak are provided with front
The left end of value pointer is slidably connected in left bar shaped slide opening, and the right-hand member of peak value pointer is slidably connected in right bar shaped slide opening, force value
Peak value pointer is driven to move downward after being touched when pointer moves downward with peak value pointer.
Preferably, the top of the left bar shaped slide opening and right bar shaped slide opening is not less than the top of strip gab, left bar shaped
The bottom of slide opening and right bar shaped slide opening is below the bottom of strip gab.
Preferably, the peak value pointer is made using light plastic or lightweight aluminum.
Preferably, the left end of the peak value pointer and right-hand member are all provided with the reflex part of oriented strip gab direction bending, turn back
The inner surface of portion and outer casing frontispiece is slidably connected.
Preferably, weight beam includes shell, and link is fixed with the top of shell, and the outer casing frontispiece is plane,
The strip gab vertically set is provided among outer casing frontispiece, force value is provided with the left side of strip gab and/or right side
Graduated scale, the spring set along strip gab being installed in shell, the top of the spring is fixed on inner surface of outer cover,
The bottom of spring is fixed with connecting rod, and the free end of connecting rod is stretched out outside outer casing bottom and is fixed with hook；Characterized in that, even
Bar and spring bottom end junction are fixed with force value pointer, and peak value indicating mechanism, the peak value are slidably connected in strip gab
Indicating mechanism includes slat supporting plates, is provided with indication hat in slat supporting plates integral middle, the left and right of the slat supporting plates is wide
Degree is corresponding with the width of strip gab, and the lower-upper length of slat supporting plates is more than the width of strip gab, in slat supporting plates
Upper and lower side be equipped with fluting for being set in strip gab or so inwall, touched when force value pointer moves downward with indication hat
Peak value indicating mechanism is driven to move downwardly together after touch.
Preferably, the peak value indicating mechanism is made using light plastic or lightweight aluminum.
Preferably, the symmetrical setting of fluting of the fluting and slat supporting plates lower end of the slat supporting plates upper end, and bar
Interval between the fluting of shape supporting plate upper end and the fluting of slat supporting plates lower end is less than the width of strip gab.
The advantageous effect of present invention is that：By moving the design of slide plate and sliding block to the bar shaped of experiment, add
Right positioning end and left positioning end, lightweight thing block is placed between left positioning end and right positioning end, so as in sliding block and bar shaped slide plate
The moment for occurring sliding drops on bar shaped slide plate, the moment that sliding block starts to slide quickly is captured, to there is maximum static friction
The moment of power is reminded, and student easily observes, and improves student experimenting interest.
On the other hand, weight beam have be to stress peak value maximum static friction force self-locking or display function with from bullet
On spring dynamometer intuitively, directly read maximum static friction force, observation and the record for solving maximum static friction force, excite
The interest of lively manual cerebrology physics, improves physics teaching in secondary school quality, have received good teaching efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of weight beam in first embodiment；
Fig. 3 be Fig. 2 in along C-C to sectional view；
Fig. 4 is the structural representation of weight beam in second embodiment；
Fig. 5 be Fig. 4 in along A-A to sectional view；
Fig. 6 is the structural representation of Tu4Zhong Dong peak values indicating mechanism；
Fig. 7 is along the structural representation of B-B direction in Fig. 6.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of maximum static friction force demonstrator, including horizontally disposed experiment porch 11, in reality
The left end for testing platform 11 is integrally formed with supporting table 1 for fixed spring dynamometer 2, and electricity is fixed with the right-hand member of experiment porch 11
Machine 9, slide plate 10 is moved equipped with the bar shaped set in left-right direction on experiment porch 11, is moved in bar shaped and is furnished with sliding block 4 on slide plate 10,
Weight beam 2 is connected by the first bracing wire 3 with the left end of sliding block 4, and motor 9 is connected by the second bracing wire 8 with the right-hand member of bar shaped slide plate 10
Connect, the left positioning end 5 extended to the right after the right-hand member of sliding block 4 is integrally formed with elder generation upwards, integrally set in the right-hand member of bar shaped slide plate 10
The right positioning end 6 extended to the left after having elder generation upwards, places lightweight thing block 7, when sliding block 4 between left positioning end 5 and right positioning end 6
Dropped with lightweight thing block 7 during bar shaped 10 relative motion of slide plate on bar shaped slide plate 10.
In order to study the relation between maximum static friction force and normal pressure, it is provided with sliding block 4 multiple for placing counterweight
Counterweight circular groove（Not shown in figure）.
In order to ensure the levelness of experiment porch 11, it is provided with experiment porch 11 and is used to adjust the levelness of experiment porch 11
Three regulating bolts 12, while air level is provided with also on experiment porch 11（Not shown in figure）To be tested when determining experiment
The levelness of platform 11.
For the simple operation of experiment, motor 9 can also be given to configure hand switch or remote control switch.
In experiment, when sliding block 4 and bar shaped 10 relative motion of slide plate, when as maximum static friction force occurs, now gently
Matter thing block 7 drops in bar shaped slide plate 10, the moment that sliding block 4 starts to slide quickly is captured, to there is the wink of maximum static friction force
Between reminded, student easily observes, and improves student experimenting interest.
On the other hand, in order to solve weight beam 2 to the stress peak value i.e. self-locking of maximum static friction force or display function
With from weight beam intuitively, directly read maximum static friction force, spring dynamometry 2 is in respect of following two embodiments：
First embodiment：
As shown in Figure 2 and Figure 3, weight beam includes shell 16, link 17 is fixed with the top of shell 16, the shell is just
Face is plane, and the strip gab 15 that vertically sets is provided among outer casing frontispiece, in the left side of strip gab 15 and/or
Right side is provided with force value graduated scale 18, and the spring 19 set along strip gab 15 is provided with shell 16, the spring 19
Top is fixed on the inner surface of shell 16, and the bottom of spring 19 is fixed with connecting rod 20, and the bottom of shell 16 is stretched out in the free end of connecting rod 20
Outside portion and it is fixed with hook 23；Force value pointer 14 is fixed with connecting rod 20 and the bottom junction of spring 19, in strip gab 15
Left side be provided with the left bar shaped slide opening 13 parallel with strip gab 15, the right side of strip gab 15 be provided with strip gab 15 it is flat
Capable right bar shaped slide opening 22, peak value pointer 21 is provided with front, the left end of the peak value pointer 21 is in left bar shaped slide opening 13
It is slidably connected, the right-hand member of peak value pointer 21 is slidably connected in right bar shaped slide opening 22, when force value pointer 14 moves downward and peak value
Pointer 21 drives peak value pointer 21 to move downward after touching.
Further, the top of the left bar shaped slide opening 13 and right bar shaped slide opening 22 is not less than the top of strip gab 15,
The bottom of left bar shaped slide opening 13 and right bar shaped slide opening 22 is below the bottom of strip gab 15, why by the left He of bar shaped slide opening 13
The bottom of right bar shaped slide opening 22 is disposed as the bottom less than strip gab 15, and its effect has two, first, can ensure that force value refers to
Pin 14 drives peak value pointer 21 to move to full scale position downwardly together, can will second, when being not required to it is to be understood that during stress peak value
Peak value pointer 21 is manually moving to least significant end, so as to not have any influence in whole range to force value pointer 14.
In order to reduce peak value pointer 21 to the drag effects of force value pointer 14 to improve measurement accuracy, the peak value pointer
21 are made using light plastic or lightweight aluminum.
Result is influenceed in order to prevent peak value pointer 21 from being come off in sliding process or occur misplacing, the peak value pointer
21 left end and right-hand member is all provided with the reflex part 24,25 of oriented strip gab direction bending, and reflex part 24,25 is interior with outer casing frontispiece
Surface is slidably connected.
In the use of the present invention, when needing to record maximal force, peak value pointer 21 is manually moving to force value first and carved
The top of chi 18 is spent, so as to during stress measure, the drive peak value of force value pointer 14 pointer 21 moves together, when reaching
During maximum weighted value, force value pointer 14 drives peak value pointer 21 to be moved to farthest, and then force value pointer 14 is retracted and peak value refers to
Pin 21 is locked at maximum vertical value so as to which maximum weighted peak value intuitively be shown；When maximal force need not be recorded,
Only peak value pointer 21 need to be manually moving to least significant end, can so as to there is no any influence in whole range to force value pointer 14
Used with serving as conventional weight beam.
Second embodiment：
As shown in Figures 4 to 7,
Including shell 29, link 28 is fixed with the top of shell 29, the front of shell 29 is plane, in the front of shell 29
Between be provided with the strip gab 26 that vertically sets, be provided with force value graduated scale 30 in the left side of strip gab 26 and/or right side,
The spring 27 set along strip gab 26 is installed in shell 29, the top of the spring 27 is fixed on the inner surface of shell 29
On, the bottom of spring 27 is fixed with connecting rod 33, and the free end of connecting rod 33 is stretched out outside the bottom of shell 29 and is fixed with hook 34；
Connecting rod 33 and the bottom junction of spring 27 are fixed with force value pointer 31, and peak value indicating mechanism is slidably connected in strip gab 26
32, the peak value indicating mechanism 32 includes slat supporting plates 36, and indication hat 35 is provided with the integral middle of slat supporting plates 36, described
The diameter of indication hat 35 is bottom-up to be sequentially reduced, and the maximum gauge of indication hat 35 is more than the width of strip gab 26, the bar
The left and right width D of shape supporting plate 36 is corresponding with the width of strip gab 26, and the lower-upper length L of slat supporting plates 36 is more than bar shaped
The width of opening 26, the fluting for being set in the inwall of strip gab 26 or so is equipped with the upper and lower side of slat supporting plates 36
37, drive peak value indicating mechanism 32 to move downwardly together after being touched when force value pointer 31 moves downward with indication hat 35.
In order to reduce peak value indicating mechanism 32 to the drag effects of force value pointer 31 to improve measurement accuracy, the peak value
Indicating mechanism 32 is made using light plastic or lightweight aluminum.
In order that obtaining peak value indicating mechanism 32 can at any time be taken out or be used in strip gab 26 with increase flexible
Property and multifunctionality, the fluting of the upper end of slat supporting plates 36 and the symmetrical setting of fluting of the lower end of slat supporting plates 36, and
Interval K between the fluting of the upper end of slat supporting plates 36 and the fluting of the lower end of slat supporting plates 36 is less than the width of strip gab 26
Degree.
In the use of the present invention, when needing to record maximal force, pinch indication hat 35 with hand first and allow slat supporting plates
36 length L directions are put into strip gab 26 along the direction of strip gab 26, then rotate horizontally peak value indicating mechanism 32
90 degree, it is stuck in by the fluting 37 at both ends in strip gab 26, rear band is touched with indication hat 35 when force value pointer 31 moves downward
After dynamic peak value indicating mechanism 32 moves to farthest downwardly together, force value pointer 31 is retracted and peak value indicating mechanism 32 is locked in most
So that maximum weighted peak value intuitively be shown at value vertical greatly；When maximal force need not be recorded, peak value need to only be referred to
Show that mechanism 32 removes strip gab 26 manually, can be with so as to there is no any influence in whole range to force value pointer 31
Conventional weight beam is served as to use.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic,
But these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of maximum static friction force demonstrator, it is characterised in that flat in experiment including horizontally disposed experiment porch
The left end of platform is integrally formed with the supporting table for fixed spring dynamometer, is fixed with motor in the right-hand member of experiment porch, is testing
Slide plate is moved equipped with the bar shaped that sets in left-right direction on platform, is moved in bar shaped and is furnished with sliding block on slide plate, weight beam passes through the
One bracing wire is connected with sliding block left end, and motor is connected by the second bracing wire with bar shaped slide plate right-hand member, is integrally formed with the right-hand member of sliding block
The left positioning end extended to the right after elder generation is upward, the right positioning extended to the left after the right-hand member of bar shaped slide plate is integrally formed with elder generation upwards
End, lightweight thing block is placed between left positioning end and right positioning end, lightweight thing block falls when sliding block is with bar shaped slide plate relative motion
Fall on bar shaped slide plate.
2. maximum static friction force demonstrator according to claim 1, it is characterised in that be provided with sliding block multiple for putting
Put the counterweight circular groove of counterweight.
3. maximum static friction force demonstrator according to claim 1, it is characterised in that be provided with experiment porch and be used to adjust
Three regulating bolts of experiment porch levelness are saved, air level is provided with experiment porch.
4. the maximum static friction force demonstrator according to claims 1 to 3 any bar, it is characterised in that weight beam bag
Shell is included, link is fixed with the top of shell, the outer casing frontispiece is plane, is provided with vertically among outer casing frontispiece
The strip gab of setting, force value graduated scale is provided with the left side of strip gab and/or right side, is provided with shell along bar shaped
Be open the spring set, and the top of the spring is fixed on inner surface of outer cover, and the bottom of spring is fixed with connecting rod, connecting rod from
Stretched out by end outside outer casing bottom and be fixed with hook；Characterized in that, it is fixed with force value in connecting rod and spring bottom end junction
Pointer, the left bar shaped slide opening parallel with strip gab is provided with the left side of strip gab, is provided with and bar on the right side of strip gab
The right bar shaped slide opening of shape opening parallel, peak value pointer is provided with front, the left end of the peak value pointer is in left bar shaped slide opening
It is slidably connected, the right-hand member of peak value pointer is slidably connected in right bar shaped slide opening, is touched when force value pointer moves downward with peak value pointer
Peak value pointer is driven to move downward after touch.
5. maximum static friction force demonstrator according to claim 4, it is characterised in that the left bar shaped slide opening and right bar shaped
The top of slide opening is not less than the top of strip gab, and the bottom of left bar shaped slide opening and right bar shaped slide opening is below strip gab
Bottom.
6. maximum static friction force demonstrator according to claim 4, it is characterised in that the peak value pointer is moulded using lightweight
Material or lightweight aluminum make.
7. maximum static friction force demonstrator according to claim 6, it is characterised in that the left end of the peak value pointer and the right side
Hold and be all provided with the reflex part that oriented strip gab direction is bent, the inner surface of reflex part and outer casing frontispiece is slidably connected.
8. the maximum static friction force demonstrator according to claims 1 to 3 any bar, it is characterised in that weight beam bag
Shell is included, link is fixed with the top of shell, the outer casing frontispiece is plane, is provided with vertically among outer casing frontispiece
The strip gab of setting, force value graduated scale is provided with the left side of strip gab and/or right side, is provided with shell along bar shaped
Be open the spring set, and the top of the spring is fixed on inner surface of outer cover, and the bottom of spring is fixed with connecting rod, connecting rod from
Stretched out by end outside outer casing bottom and be fixed with hook；Characterized in that, it is fixed with force value in connecting rod and spring bottom end junction
Pointer, peak value indicating mechanism is slidably connected in strip gab, the peak value indicating mechanism includes slat supporting plates, in bar shaped
Supporting plate integral middle is provided with indication hat, and the left and right width of the slat supporting plates is corresponding with the width of strip gab, bar shaped
The lower-upper length of supporting plate is more than the width of strip gab, is equipped with the upper and lower side of slat supporting plates and is opened for being set in bar shaped
The fluting of mouth or so inwall, peak value indicating mechanism is driven to transport downwardly together after being touched when force value pointer moves downward with indication hat
It is dynamic.
9. maximum static friction force demonstrator according to claim 8, it is characterised in that the peak value indicating mechanism is using light
Matter plastics or lightweight aluminum make.
10. maximum static friction force demonstrator according to claim 9, it is characterised in that the slat supporting plates upper end
Fluting and the symmetrical setting of fluting of slat supporting plates lower end, and the fluting of slat supporting plates upper end and slat supporting plates lower end
Interval between fluting is less than the width of strip gab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350771.3A CN107749222B (en) | 2017-12-15 | 2017-12-15 | Maximum static friction force demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350771.3A CN107749222B (en) | 2017-12-15 | 2017-12-15 | Maximum static friction force demonstration instrument |
Publications (2)
| Publication Number | Publication Date |
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| CN107749222A true CN107749222A (en) | 2018-03-02 |
| CN107749222B CN107749222B (en) | 2024-04-16 |
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ID=61249954
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711350771.3A Active CN107749222B (en) | 2017-12-15 | 2017-12-15 | Maximum static friction force demonstration instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61179585U (en) * | 1986-05-06 | 1986-11-08 | ||
| CN203799535U (en) * | 2014-02-24 | 2014-08-27 | 湖北民族学院 | Maximum static friction force exploration device |
| CN203910097U (en) * | 2014-06-11 | 2014-10-29 | 田承开 | Novel spring balance |
| CN204143708U (en) * | 2014-11-21 | 2015-02-04 | 张文堂 | One probes into friction force rule detection instrument |
| CN205879426U (en) * | 2016-08-12 | 2017-01-11 | 刘逸丹 | Biggest stiction testing arrangement |
| CN205881266U (en) * | 2016-04-19 | 2017-01-11 | 陕西理工学院 | Test device is verified to frictional force |
| CN207610802U (en) * | 2017-12-15 | 2018-07-13 | 胡国领 | A kind of weight beam with peak value display function |
| CN208819457U (en) * | 2017-12-15 | 2019-05-03 | 胡国领 | A kind of maximum static friction force demonstrator |
-
2017
- 2017-12-15 CN CN201711350771.3A patent/CN107749222B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61179585U (en) * | 1986-05-06 | 1986-11-08 | ||
| CN203799535U (en) * | 2014-02-24 | 2014-08-27 | 湖北民族学院 | Maximum static friction force exploration device |
| CN203910097U (en) * | 2014-06-11 | 2014-10-29 | 田承开 | Novel spring balance |
| CN204143708U (en) * | 2014-11-21 | 2015-02-04 | 张文堂 | One probes into friction force rule detection instrument |
| CN205881266U (en) * | 2016-04-19 | 2017-01-11 | 陕西理工学院 | Test device is verified to frictional force |
| CN205879426U (en) * | 2016-08-12 | 2017-01-11 | 刘逸丹 | Biggest stiction testing arrangement |
| CN207610802U (en) * | 2017-12-15 | 2018-07-13 | 胡国领 | A kind of weight beam with peak value display function |
| CN208819457U (en) * | 2017-12-15 | 2019-05-03 | 胡国领 | A kind of maximum static friction force demonstrator |
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| Publication number | Publication date |
|---|---|
| CN107749222B (en) | 2024-04-16 |
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