CN107749222B - Maximum static friction force demonstration instrument - Google Patents
Maximum static friction force demonstration instrument Download PDFInfo
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- CN107749222B CN107749222B CN201711350771.3A CN201711350771A CN107749222B CN 107749222 B CN107749222 B CN 107749222B CN 201711350771 A CN201711350771 A CN 201711350771A CN 107749222 B CN107749222 B CN 107749222B
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- 230000003068 static effect Effects 0.000 title claims abstract description 34
- 238000002474 experimental method Methods 0.000 claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
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- 238000005259 measurement Methods 0.000 description 2
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- 230000008034 disappearance Effects 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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Abstract
The invention discloses a maximum static friction force demonstration instrument which comprises an experiment platform arranged along the horizontal direction, wherein a supporting table for fixing a spring dynamometer is integrally arranged at the left end of the experiment platform, a motor is fixed at the right end of the experiment platform, a bar-shaped movable slide plate arranged along the left-right direction is matched on the experiment platform, a slide block is matched on the bar-shaped movable slide plate, the spring dynamometer is connected with the left end of the slide block through a first pull wire, the motor is connected with the right end of the bar-shaped slide plate through a second pull wire, a left positioning end which extends upwards and then rightwards is integrally arranged at the right end of the slide block, a right positioning end which extends upwards and leftwards is integrally arranged at the right end of the bar-shaped slide plate, and a light object block is placed between the left positioning end and the right positioning end and falls on the bar-shaped slide plate when the slide block and the bar-shaped slide plate relatively move.
Description
Technical Field
The invention belongs to the technical field of teaching experiment devices, and particularly relates to a maximum static friction force demonstration instrument.
Background
The static friction force demonstration experiment is an important knowledge point in high school physical teaching, and has a limit for increasing the static friction force and the maximum value of the static friction forceF max The numerical value is equal to the pulling force of the object when the object just starts to move, and the actually generated static friction force F between the two objects is between 0 and the maximum static friction forceF max In between the two, namely, F is more than 0 and less than or equal toF max 。
In the experiment, a wood block is hooked by a spring dynamometer, then the spring dynamometer is moved at a constant speed in the direction parallel to a tabletop, according to the two-force balance knowledge, students can observe the change condition of friction force through the indication value of the spring dynamometer, in the experimental process, firstly, the instant of the sliding of the wood block is changed from the maximum static friction force to the sliding friction force, so that the student cannot observe the wood block easily; secondly, the spring dynamometer used in the experiment shows the disappearance in the moment after the maximum peak value is displayed, and students are not easy to observe, so that the students can not observe the maximum static friction force intuitively in the whole experiment, and the experiment effect is poor.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a maximum static friction force demonstration instrument which is applied to a maximum static friction force demonstration experiment, and can lock a maximum static friction force value so as to more intuitively read the maximum static friction force, and adopts the following technical scheme that:
the utility model provides a biggest static friction force demonstration appearance, include the experiment platform that sets up along the horizontal direction, be equipped with the brace table that is used for fixed spring dynamometer in the left end of experiment platform an organic whole, be fixed with the motor at the right-hand member of experiment platform, be furnished with the bar that sets up along left and right directions on experiment platform and move the slide, be furnished with the slider on moving the slide in the bar, the spring dynamometer is connected with the slider left end through first acting as go-between, the motor is connected with the bar slide right-hand member through the second acting as go-between, be equipped with the left location end that upwards and then extend to the right side earlier in the right-hand member of slider an organic whole, be equipped with the right location end that upwards and then extend to the left at the right-hand member of bar slide an organic whole, place light thing piece between left location end and right location end, light thing piece drops on the bar slide when slider and bar slide relative motion.
Preferably, a plurality of counterweight circular grooves for placing weights are arranged on the sliding block.
Preferably, three adjusting bolts for adjusting levelness of the experiment platform are arranged on the experiment platform, and a level bubble is arranged on the experiment platform.
Preferably, the spring dynamometer comprises a shell, a hanging ring is fixed at the top of the shell, the front surface of the shell is a plane, a strip-shaped opening arranged along the vertical direction is arranged in the middle of the front surface of the shell, a force value graduated scale is arranged on the left side and/or the right side of the strip-shaped opening, a spring arranged along the strip-shaped opening is installed in the shell, the top end of the spring is fixed on the inner surface of the shell, a connecting rod is fixed at the bottom end of the spring, and the free end of the connecting rod extends out of the bottom of the shell and is fixed with a hook; the device is characterized in that a powerful value pointer is fixed at the joint of the connecting rod and the bottom end of the spring, a left strip-shaped sliding hole parallel to the strip-shaped opening is formed in the left side of the strip-shaped opening, a right strip-shaped sliding hole parallel to the strip-shaped opening is formed in the right side of the strip-shaped opening, a peak pointer is arranged on the front face of the device, the left end of the peak pointer is connected in the left strip-shaped sliding hole in a sliding mode, the right end of the peak pointer is connected in the right strip-shaped sliding hole in a sliding mode, and the peak pointer is driven to move downwards after touching the peak pointer when the powerful value pointer moves downwards.
Preferably, the top ends of the left strip-shaped sliding hole and the right strip-shaped sliding hole are not lower than the top ends of the strip-shaped openings, and the bottom ends of the left strip-shaped sliding hole and the right strip-shaped sliding hole are lower than the bottom ends of the strip-shaped openings.
Preferably, the peak indicator is made of light plastic or light aluminum materials.
Preferably, the left end and the right end of the peak pointer are respectively provided with a folding part which is bent towards the direction of the strip-shaped opening, and the folding parts are in sliding connection with the inner surface of the front surface of the shell.
Preferably, the spring dynamometer comprises a shell, a hanging ring is fixed at the top of the shell, the front surface of the shell is a plane, a strip-shaped opening arranged along the vertical direction is arranged in the middle of the front surface of the shell, a force value graduated scale is arranged on the left side and/or the right side of the strip-shaped opening, a spring arranged along the strip-shaped opening is installed in the shell, the top end of the spring is fixed on the inner surface of the shell, a connecting rod is fixed at the bottom end of the spring, and the free end of the connecting rod extends out of the bottom of the shell and is fixed with a hook; the device is characterized in that a powerful value pointer is fixed at the joint of the connecting rod and the bottom end of the spring, a peak value indicating mechanism is slidably connected in the strip-shaped opening, the peak value indicating mechanism comprises a strip-shaped supporting plate, an indicating cap is integrally arranged in the middle of the strip-shaped supporting plate, the left-right width of the strip-shaped supporting plate corresponds to the width of the strip-shaped opening, the upper-lower length of the strip-shaped supporting plate is larger than the width of the strip-shaped opening, grooves used for being sleeved on the left-right inner wall of the strip-shaped opening are formed in the upper end and the lower end of the strip-shaped supporting plate, and the peak value indicating mechanism is driven to move downwards together after being contacted with the indicating cap when the powerful value pointer moves downwards.
Preferably, the peak value indicating mechanism is made of light plastic or light aluminum materials.
Preferably, the grooves at the upper end of the strip-shaped supporting plate and the grooves at the lower end of the strip-shaped supporting plate are symmetrically arranged, and the interval between the grooves at the upper end of the strip-shaped supporting plate and the grooves at the lower end of the strip-shaped supporting plate is smaller than the width of the strip-shaped opening.
The invention has the beneficial effects that: through the design to the strip movable slide board and the slider that use of experiments, increased right side location end and left side location end, place light thing piece between left side location end and right side location end to drop on the strip slide board in the gliding moment appears in slider and strip slide, catch the slider fast and begin gliding moment, remind in the moment that appears the biggest static friction, the student observes easily, has improved student's experimental interest.
On the other hand, the spring dynamometer has a self-locking or display function on a stress peak value, namely the maximum static friction force, so that the maximum static friction force is intuitively and directly read out from the spring dynamometer, the observation and recording of the maximum static friction force are solved, the interest of students in manual brain physics is stimulated, the physical teaching quality of middle school is improved, and a good teaching effect is achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the spring force gauge in the first embodiment;
FIG. 3 is a cross-sectional view taken along the direction C-C in FIG. 2;
FIG. 4 is a schematic view of a spring force gauge in a second embodiment;
FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;
FIG. 6 shows the dynamic peak value of FIG. 4 a schematic structural view of the indicating mechanism;
fig. 7 is a schematic view of the structure of fig. 6 along the direction B-B.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a maximum static friction force demonstration instrument comprises an experiment platform 11 arranged along a horizontal direction, a supporting table 1 for fixing a spring dynamometer 2 is integrally arranged at the left end of the experiment platform 11, a motor 9 is fixed at the right end of the experiment platform 11, a bar-shaped movable slide plate 10 arranged along the left-right direction is arranged on the experiment platform 11, a slide block 4 is arranged on the bar-shaped movable slide plate 10, the spring dynamometer 2 is connected with the left end of the slide block 4 through a first stay wire 3, the motor 9 is connected with the right end of the bar-shaped slide plate 10 through a second stay wire 8, a left positioning end 5 which extends upwards firstly and then rightwards is integrally arranged at the right end of the slide block 4, a right positioning end 6 which extends upwards firstly and then leftwards is integrally arranged at the right end of the bar-shaped slide plate 10, a light object block 7 is placed between the left positioning end 5 and the right positioning end 6, and the light object block 7 falls on the bar-shaped slide plate 10 when the slide block 4 and the bar-shaped slide plate 10 relatively move.
In order to investigate the relationship between the maximum static friction and the positive pressure, a plurality of weight round grooves (not shown) for placing weights are provided on the slider 4.
In order to ensure the levelness of the experiment table 11, three adjusting bolts 12 for adjusting the levelness of the experiment table 11 are provided on the experiment table 11, and a level bubble (not shown in the drawing) is also provided on the experiment table 11 to determine the levelness of the experiment table 11 at the time of experiment.
For ease of operation of the test, the motor 9 may also be provided with a manual switch or a remote switch.
In the experiment, when the relative motion of the sliding block 4 and the strip-shaped sliding plate 10 is the maximum static friction force, the light object block 7 falls on the strip-shaped sliding plate 10 at the moment, the moment that the sliding block 4 starts to slide is rapidly captured, the moment that the maximum static friction force appears is reminded, students can observe easily, and the experimental interest of the students is improved.
On the other hand, in order to solve the self-locking or display function of the spring force gauge 2 on the peak force, i.e. the maximum static friction force, to intuitively and directly read the maximum static friction force from the spring force gauge, the spring force gauge 2 has the following two embodiments:
first embodiment:
as shown in fig. 2 and 3, the spring dynamometer comprises a shell 16, a hanging ring 17 is fixed at the top of the shell 16, the front surface of the shell is a plane, a strip-shaped opening 15 arranged along the vertical direction is arranged in the middle of the front surface of the shell, a force value graduated scale 18 is arranged at the left side and/or the right side of the strip-shaped opening 15, a spring 19 arranged along the strip-shaped opening 15 is arranged in the shell 16, the top end of the spring 19 is fixed on the inner surface of the shell 16, a connecting rod 20 is fixed at the bottom end of the spring 19, and the free end of the connecting rod 20 extends out of the bottom of the shell 16 and is fixed with a hook 23; a forceful value pointer 14 is fixed at the joint of the bottom end of the connecting rod 20 and the bottom end of the spring 19, a left strip-shaped sliding hole 13 parallel to the strip-shaped opening 15 is arranged on the left side of the strip-shaped opening 15, a right strip-shaped sliding hole 22 parallel to the strip-shaped opening 15 is arranged on the right side of the strip-shaped opening 15, a peak pointer 21 is arranged on the front surface, the left end of the peak pointer 21 is connected in a sliding manner in the left strip-shaped sliding hole 13, the right end of the peak pointer 21 is connected in a sliding manner in the right strip-shaped sliding hole 22, and the peak pointer 21 is driven to move downwards after touching the peak pointer 21 when the forceful value pointer 14 moves downwards.
Further, the top ends of the left bar-shaped sliding hole 13 and the right bar-shaped sliding hole 22 are not lower than the top end of the bar-shaped opening 15, and the bottom ends of the left bar-shaped sliding hole 13 and the right bar-shaped sliding hole 22 are lower than the bottom end of the bar-shaped opening 15, so that the bottom ends of the left bar-shaped sliding hole 13 and the right bar-shaped sliding hole 22 are both lower than the bottom end of the bar-shaped opening 15, the two functions are that firstly, the force value pointer 14 can be guaranteed to drive the peak value pointer 21 to move downwards to a full range position together, and secondly, when a stressed peak value is not needed to be known, the peak value pointer 21 can be manually moved to the lowest end, so that no influence is caused on the force value pointer 14 in the whole range.
In order to reduce the resistive effect of the peak pointer 21 on the force value pointer 14 to improve measurement accuracy, the peak pointer 21 is made of light plastic or light aluminum material.
In order to prevent the peak pointer 21 from falling off or dislocating during sliding and affecting the result, the left end and the right end of the peak pointer 21 are respectively provided with a folding part 24 and 25 which are bent towards the direction of the strip-shaped opening, and the folding parts 24 and 25 are connected with the inner surface of the front surface of the shell in a sliding way.
When the invention is used, when the maximum force value needs to be recorded, the peak value pointer 21 is manually moved to the uppermost end of the force value graduated scale 18, so that in the process of measuring the force, the force value pointer 14 drives the peak value pointer 21 to move together, when the maximum force value is reached, the force value pointer 14 drives the peak value pointer 21 to move to the farthest distance, and then the force value pointer 14 is retracted, and the peak value pointer 21 is locked at the maximum standing value, so that the maximum force peak value is intuitively displayed; when the maximum force value does not need to be recorded, the peak pointer 21 is only manually moved to the lowest end, so that the force value pointer 14 has no influence in the whole range and can be used as a conventional spring dynamometer.
Second embodiment:
as shown in figures 4 to 7 of the drawings,
the device comprises a shell 29, wherein a hanging ring 28 is fixed at the top of the shell 29, the front surface of the shell 29 is a plane, a strip-shaped opening 26 arranged along the vertical direction is arranged in the middle of the front surface of the shell 29, a force value graduated scale 30 is arranged at the left side and/or the right side of the strip-shaped opening 26, a spring 27 arranged along the strip-shaped opening 26 is installed in the shell 29, the top end of the spring 27 is fixed on the inner surface of the shell 29, a connecting rod 33 is fixed at the bottom end of the spring 27, and the free end of the connecting rod 33 extends out of the bottom of the shell 29 and is fixed with a hook 34; the connecting rod 33 and the bottom end connection of the spring 27 are fixedly provided with a powerful value pointer 31, the bar-shaped opening 26 is slidably connected with a peak value indicating mechanism 32, the peak value indicating mechanism 32 comprises a bar-shaped supporting plate 36, an indicating cap 35 is integrally arranged in the middle of the bar-shaped supporting plate 36, the diameters of the indicating caps 35 are sequentially reduced from bottom to top, the maximum diameter of the indicating cap 35 is larger than the width of the bar-shaped opening 26, the left-right width D of the bar-shaped supporting plate 36 corresponds to the width of the bar-shaped opening 26, the up-down length L of the bar-shaped supporting plate 36 is larger than the width of the bar-shaped opening 26, grooves 37 which are used for being sleeved on the left-right inner walls of the bar-shaped opening 26 are formed in the upper end and the lower end of the bar-shaped supporting plate 36, and when the force value pointer 31 moves downwards, the peak value indicating mechanism 32 is driven to move downwards together after touching the indicating cap 35.
In order to reduce the influence of the peak indication mechanism 32 on the resistance of the force value pointer 31 to improve the measurement accuracy, the peak indication mechanism 32 is made of a lightweight plastic or lightweight aluminum material.
In order to allow the peak indication mechanism 32 to be removed from or installed in the bar-shaped opening 26 at any time to increase flexibility and versatility of use, the slots in the upper end of the bar-shaped support plate 36 and the slots in the lower end of the bar-shaped support plate 36 are symmetrically arranged, and the interval K between the slots in the upper end of the bar-shaped support plate 36 and the slots in the lower end of the bar-shaped support plate 36 is smaller than the width of the bar-shaped opening 26.
When the invention is used, when the maximum force value needs to be recorded, the indicating cap 35 is pinched by hand to enable the length L direction of the bar-shaped supporting plate 36 to be placed into the bar-shaped opening 26 along the direction of the bar-shaped opening 26, then the peak value indicating mechanism 32 is horizontally rotated by 90 degrees and is clamped in the bar-shaped opening 26 through the grooves 37 at the two ends, when the force value pointer 31 moves downwards, the force value pointer 31 is contacted with the indicating cap 35 to drive the peak value indicating mechanism 32 to move downwards to the farthest distance, and then the force value pointer 31 is retracted and the peak value indicating mechanism 32 is locked at the maximum vertical value, so that the maximum force peak value is intuitively displayed; when the maximum force value does not need to be recorded, the peak value indicating mechanism 32 is only required to be manually moved out of the strip-shaped opening 26, so that the force value pointer 31 has no influence in the whole range and can be used as a conventional spring dynamometer.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The maximum static friction force demonstration instrument is characterized by comprising an experiment platform arranged along the horizontal direction, wherein a supporting table for fixing a spring dynamometer is integrally arranged at the left end of the experiment platform, a motor is fixed at the right end of the experiment platform, and a manual switch or a remote switch is arranged on the motor; the experimental platform is provided with a bar-shaped movable slide plate arranged along the left-right direction, the bar-shaped movable slide plate is provided with a slide block, a spring dynamometer is connected with the left end of the slide block through a first stay wire, a motor is connected with the right end of the bar-shaped slide plate through a second stay wire, the right end of the slide block is integrally provided with a left positioning end which extends upwards and then rightwards, the right end of the bar-shaped slide plate is integrally provided with a right positioning end which extends upwards and then leftwards, a light object block is placed between the left positioning end and the right positioning end, and when the slide block and the bar-shaped slide plate move relatively, the light object block falls on the bar-shaped slide plate; a plurality of balance weight round grooves for placing weights are formed in the sliding block;
the spring dynamometer comprises a shell, a hanging ring is fixed at the top of the shell, the front surface of the shell is a plane, a strip-shaped opening arranged along the vertical direction is arranged in the middle of the front surface of the shell, a force value graduated scale is arranged on the left side and/or the right side of the strip-shaped opening, a spring arranged along the strip-shaped opening is installed in the shell, the top end of the spring is fixed on the inner surface of the shell, a connecting rod is fixed at the bottom end of the spring, and the free end of the connecting rod extends out of the bottom of the shell and is fixed with a hook; a powerful value pointer is fixed at the joint of the connecting rod and the bottom end of the spring, a left strip-shaped sliding hole parallel to the strip-shaped opening is formed in the left side of the strip-shaped opening, a right strip-shaped sliding hole parallel to the strip-shaped opening is formed in the right side of the strip-shaped opening, a peak pointer is arranged on the front side of the strip-shaped opening, the left end of the peak pointer is in sliding connection in the left strip-shaped sliding hole, the right end of the peak pointer is in sliding connection in the right strip-shaped sliding hole, and the peak pointer is driven to move downwards after touching the peak pointer when the powerful value pointer moves downwards;
when the maximum force value needs to be recorded, the peak value pointer is manually moved to the uppermost end of the force value graduated scale, so that in the process of measuring the force, the force value pointer drives the peak value pointer to move together, when the maximum force value is reached, the force value pointer drives the peak value pointer to move to the farthest distance, then the force value pointer returns, and the peak value pointer is locked at the maximum standing value, so that the maximum force peak value is intuitively displayed.
2. The maximum static friction force demonstrator of claim 1, characterized in that three adjusting bolts for adjusting levelness of the experiment platform are arranged on the experiment platform, and a level bubble is arranged on the experiment platform.
3. The maximum static friction force demonstration instrument according to claim 1, wherein the top ends of the left and right bar-shaped slide holes are not lower than the top ends of the bar-shaped openings, and the bottom ends of the left and right bar-shaped slide holes are lower than the bottom ends of the bar-shaped openings.
4. A maximum static friction force demonstrator as claimed in claim 3, wherein the peak pointer is made of light plastic or light aluminum material.
5. The maximum static friction force demonstrator of claim 4, wherein the left end and the right end of the peak pointer are respectively provided with a folding part which is bent towards the direction of the strip-shaped opening, and the folding parts are in sliding connection with the inner surface of the front surface of the shell.
6. The maximum static friction force demonstration instrument according to any one of claims 1 to 5, wherein the spring dynamometer can be of another structure, the spring dynamometer comprises a shell, a hanging ring is fixed at the top of the shell, the front surface of the shell is a plane, a strip-shaped opening arranged along the vertical direction is arranged in the middle of the front surface of the shell, a force value graduated scale is arranged at the left side and/or the right side of the strip-shaped opening, a spring arranged along the strip-shaped opening is arranged in the shell, the top end of the spring is fixed on the inner surface of the shell, a connecting rod is fixed at the bottom end of the spring, and the free end of the connecting rod extends out of the bottom of the shell and is fixed with a hook; a strong value pointer is fixed at the joint of the connecting rod and the bottom end of the spring, a peak value indicating mechanism is slidably connected in the strip-shaped opening, the peak value indicating mechanism comprises a strip-shaped supporting plate, an indicating cap is integrally arranged in the middle of the strip-shaped supporting plate, the left-right width of the strip-shaped supporting plate corresponds to the width of the strip-shaped opening, the upper-lower length of the strip-shaped supporting plate is larger than the width of the strip-shaped opening, grooves used for being sleeved on the left-right inner wall of the strip-shaped opening are formed in the upper end and the lower end of the strip-shaped supporting plate, and when the strong value pointer moves downwards, the strong value pointer contacts with the indicating cap to drive the peak value indicating mechanism to move downwards;
when the maximum force value is required to be recorded, the indicating cap is pinched by a hand to enable the length L direction of the strip-shaped supporting plate to be placed in the strip-shaped opening along the direction of the strip-shaped opening, then the peak value indicating mechanism is horizontally rotated by 90 degrees and clamped in the strip-shaped opening through grooves at two ends, the force value indicator moves downwards to the farthest position along with the peak value indicating mechanism driven by the touch of the indicating cap when the force value indicator moves downwards, and then the force value indicator retreats to enable the peak value indicating mechanism to be locked at the maximum standing position, so that the maximum stress peak value is intuitively displayed.
7. The maximum static friction force demonstrating instrument according to claim 6, wherein the peak indication mechanism is made of light plastic or light aluminum materials.
8. The maximum static friction force demonstrator of claim 7, wherein the grooves of the upper end of the bar-shaped support plate and the grooves of the lower end of the bar-shaped support plate are symmetrically arranged, and a space between the grooves of the upper end of the bar-shaped support plate and the grooves of the lower end of the bar-shaped support plate is smaller than a width of the bar-shaped opening.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350771.3A CN107749222B (en) | 2017-12-15 | 2017-12-15 | Maximum static friction force demonstration instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711350771.3A CN107749222B (en) | 2017-12-15 | 2017-12-15 | Maximum static friction force demonstration instrument |
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| CN107749222A CN107749222A (en) | 2018-03-02 |
| CN107749222B true CN107749222B (en) | 2024-04-16 |
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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 |
| 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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| CN107749222A (en) | 2018-03-02 |
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