CN109637301A - A kind of student's lever used for physics principle in-class experiment device - Google Patents
A kind of student's lever used for physics principle in-class experiment device Download PDFInfo
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- CN109637301A CN109637301A CN201910132963.XA CN201910132963A CN109637301A CN 109637301 A CN109637301 A CN 109637301A CN 201910132963 A CN201910132963 A CN 201910132963A CN 109637301 A CN109637301 A CN 109637301A
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- force
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- 238000005259 measurement Methods 0.000 description 2
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Classifications
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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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- Pure & Applied Mathematics (AREA)
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- Business, Economics & Management (AREA)
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- Theoretical Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of student lever used for physics principle in-class experiment devices, belong to Physical Experiment apparatus field, solving lever principle can not intuitively show in teaching, the problem of lacking related teaching aid and related parameter values in lever principle can not be adjusted flexibly, it is characterized in that: including demonstrating frame, demonstrate lever and fulcrum sliding block, pass through the setting demonstration lever in demonstration frame, change the fulcrum slide position on demonstration lever, the position of first force-application block and the second force-application block, hang the quantity of counterweight, consequently facilitating to the position of the fulcrum of lever, the fulcrum two sides arm of force and fulcrum two sides stress size are adjusted, conveniently with hall demonstration and experimental implementation, the first piston cylinder and second piston cylinder of two sides are connected, demonstration lever end downward pressure applied is intuitively reflected on dynamics demonstration board, facilitate and is drilled to student's displaying Pressure applied value when showing lever inclination.
Description
Technical field
The present invention relates to Physical Experiment apparatus fields, are specifically related to a kind of student's lever used for physics principle in-class experiment dress
It sets.
Background technique
Lever principle is important one of content of courses, and lever divides again claims laborious lever, laborsaving lever and bascule, thick stick
Rod principle is also referred to as " lever equilibrium condition "；Make lever balance, (power and the arm of force multiply two acted on lever torque
Product) size must be equal.That is: power × power arm=resistance × resistance arm, is expressed as F1L1=F2L2 with algebraic expression.Formula
In, F1 indicates that power, L1 indicate that power arm, F2 indicate that resistance, L2 indicate resistance arm.It can be seen that from above formula, reach lever
Balance, power arm is several times of resistance arm, and resistance is exactly several times of power.
In physics teaching, in order to preferably explain and impart knowledge to students to lever principle, relevant lever used for physics is needed to teach
Tool is assisted.Currently, lacking corresponding lever used for physics experiment teaching aid, usually carried out by teacher using some experimental demonstration teaching aids
Assembly demonstration, process is time-consuming and laborious, lacks intuitive experiment effect, and usually assembled teaching aid can not flexibly change lever principle
In power and the arm of force parameter value, the position of fulcrum can not also be adjusted flexibly.When often changing a certain parameter, require again into
Row is primary assembled, and operation is time-consuming and laborious, is unfavorable for in-class experiment operation.
Accordingly, it is desirable to provide a kind of student lever used for physics principle in-class experiment device, it is intended to solve the above problems.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of student with lever used for physics principle with hall
Experimental provision, to solve the problems in above-mentioned background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of student's lever used for physics principle in-class experiment device, including demonstration frame, demonstration lever and fulcrum sliding block, demonstrate frame
Demonstration lever is equipped with inside frame, demonstration lever upper center offers fulcrum sliding slot, and sliding is provided with supporting point sliding in fulcrum sliding slot
Block, for fulcrum slider top by the hinged suspending rod of pin shaft, suspending rod top connects suspending rod sliding block, the sliding setting of suspending rod sliding block
In the sliding slot of demonstration frame roof；
Point of application sliding slot is equipped in the middle part of the demonstration lever bottom side, sliding is provided with the first force-application block and second in point of application sliding slot
Force-application block, the first force-application block and the second force-application block are force sliding block, are threaded with force screw in the middle part of force sliding block, exert a force
Screw bottom end is equipped with force hanging ring, and force hanging ring is equipped with counterweight hook, is connected with several counterweights below counterweight hook.
As a further solution of the present invention, the demonstration frame is the body structure that front side is set as opening.
As a further solution of the present invention, the supporting point sliding slot cross-section is in " convex " font, and fulcrum sliding block two sides are equipped with lock
Gu screw, locking screw is screwed in the screw hole on fulcrum sliding block.
As a further solution of the present invention, suspending rod bottom is equipped with dial, and dial is equipped with for identifying angle
The scale of degree, fulcrum sliding block top are connected with dial needle, and dial needle is directed toward the scale on dial.
As a further solution of the present invention, demonstration lever is telescopic rod, is equipped in the middle part of telescopic rod and adjusts screw.
As a further solution of the present invention, the sliding slot of frame roof is demonstrated in " convex " font structure, suspending rod sliding block
It is equipped with the locking screw that screw thread is connected.
As a further solution of the present invention, the demonstration lever forward upper is equipped with fulcrum graduation mark, before demonstrating lever
Side bottom is equipped with point of application graduation mark, and force sliding block is equipped with point of application pointer, and point of application pointer is set towards point of application graduation mark
It sets.
As a further solution of the present invention, force sliding block is slidably arranged in inverted " convex " font point of application sliding slot.
As a further solution of the present invention, the demonstration lever both ends are respectively connected with connecting rod, and connecting rod bottom side is respectively connected with
Lower pressure ball, lower pressure ball lower section are equipped with compression bar, and compression bar bottom is connected with the first piston plate in first piston cylinder, first piston cylinder
Bottom side connects pipe, and communicating valve is equipped on communicating pipe, connects second piston cylinder bottom side, installation in second piston cylinder communicating pipe
There is second piston plate, dynamics indicating arm is connected at the top of second piston plate, is equipped with dynamics demonstration board on the upside of dynamics indicating arm, dynamics is drilled
Show that plate is mounted on demonstration frame.
In conclusion compared with the prior art, the invention has the following beneficial effects:
Structure of the invention is simple, easy to operate, by the setting demonstration lever in demonstration frame, changes the branch on demonstration lever
It puts the position of slide position, the first force-application block and the second force-application block, hang the quantity of counterweight, consequently facilitating to the branch point of lever
Set, the fulcrum two sides arm of force and fulcrum two sides stress size are adjusted, convenient with hall demonstration and experimental implementation, the first of two sides
Piston cylinder and second piston cylinder are connected, and demonstration lever end downward pressure applied is intuitively reflected in dynamics demonstration board
On, facilitate pressure applied value when showing that demonstration lever tilts to student.
In order to explain the structural features and functions of the invention more clearly, come with reference to the accompanying drawing with specific embodiment to this hair
It is bright to be described in detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of invention.
Fig. 2 is the structural schematic diagram that lever is demonstrated in invention.
Fig. 3 is the schematic cross-section that lever is demonstrated in invention.
Fig. 4 is the structural schematic diagram that first piston cylinder is connected with second piston cylinder in invention.
Appended drawing reference: 1- demonstrates frame, 2- dynamics demonstration board, 3- dynamics indicating arm, 4- second piston plate, 5- second piston
Pressure ball, 12- connecting rod, 13- under cylinder, 6- communicating pipe, 7- communicating valve, 8- first piston plate, 9- first piston cylinder, 10- compression bar, 11-
Lever, 14- fulcrum graduation mark, the first force-application block of 15-, the second force-application block of 16-, 17- counterweight, 18- fulcrum sliding block, 19- is demonstrated to carve
Scale, 20- suspending rod, 21- point of application graduation mark, 22- point of application pointer, 23- force sliding block, 24- force screw, 25- force
Hanging ring, 26- counterweight hook, 27- dial needle, 28- adjust screw, 29- suspending rod sliding block, 30- locking screw, 31- fulcrum
Sliding slot, 32- point of application sliding slot.
Specific embodiment
The following further describes the technical solution of the present invention in the following with reference to the drawings and specific embodiments.
Referring to figs. 1 to 4, in the present embodiment, a kind of student's lever used for physics principle in-class experiment device, including demonstration frame
Frame 1, demonstration lever 13 and fulcrum sliding block 18, the demonstration frame 1 is the body structure that front side is set as opening, in demonstration,
Open side is placed towards student, is operated by student or teacher；Demonstration lever 13, demonstration are equipped with inside the demonstration frame 1
13 upper center of lever offers fulcrum sliding slot 31, and 31 section of fulcrum sliding slot is in " convex " font, sliding setting in fulcrum sliding slot 31
There is fulcrum sliding block 18,18 two sides of fulcrum sliding block are equipped with locking screw 30, and locking screw 30 is screwed on fulcrum sliding block 18
In screw hole, when locking screw 30 is tightened, end offsets with demonstration lever 13, convenient to the supporting point sliding in fulcrum sliding slot 31
The fixation of the progress of block 18 position.
By the hinged suspending rod 20 of pin shaft at the top of the fulcrum sliding block 18,20 bottom of suspending rod is equipped with dial 19, carves
Scale 19 is equipped with the scale for identifying angle, and 18 top of fulcrum sliding block is connected with dial needle 27, and dial refers to
Needle 27 is directed toward the scale on dial 19, is fixed on when demonstration lever 13 and by locking screw 30 fulcrum demonstrated on lever 13
Sliding block 18 around pin shaft relative to 20 Sloped rotating of suspending rod when, the dial needle 27 on 18 top of fulcrum sliding block is directed toward dial 19
The scale of upper different angle, consequently facilitating the tilt angle of observation demonstration lever 13.
The demonstration lever 13 is telescopic rod, and the adjusting screw 28 for adjusting its length is equipped in the middle part of telescopic rod, works as tune
When section screw 28 is unscrewed, facilitate the extension elongation for adjusting telescopic rod, then carries out length of telescopic bar by tightening section screw 28
It is fixed.
Suspending rod sliding block 29 is connected at the top of the suspending rod 20, suspending rod sliding block 29 is slidably arranged in 1 top of demonstration frame
Sliding slot in, sliding slot is in " convex " font structure is fallen, and suspending rod sliding block 29 is equipped with the locking screw 30 that is connected of screw thread, and lock spiral shell
Nail 30 is passed through and is offseted at the top of screw hole and demonstration frame 1 on suspending rod sliding block 29, convenient that 29 position of suspending rod sliding block is fixed.
When sliding slot sliding of the suspending rod sliding block 29 along 1 top of demonstration frame, and cooperate fulcrum sliding block 18 in fulcrum sliding slot
Sliding in 31, facilitates the position of fulcrum on the position for adjusting suspending rod 20 and demonstration lever 13, and then adjusts fulcrum sliding block 18
The torque arm length of two sides.
13 forward upper of demonstration lever is equipped with fulcrum graduation mark 14, the convenient fulcrum sliding block 18 on demonstration lever 13
Position measurement.
Point of application sliding slot 32 is equipped in the middle part of 13 bottom side of demonstration lever, sliding is provided with first and applies in point of application sliding slot 32
Power block 15 and the second force-application block 16, the first force-application block 15 and the second force-application block 16 are force sliding block 23, and force sliding block 23 slides
It is arranged in inverted " convex " font point of application sliding slot 32, force screw 24 is threaded in the middle part of the force sliding block 23, is applied
It offsets when power screw 24 is tightened with demonstration lever 13, facilitates and force sliding block 23 is fixed on demonstration 13 bottom of lever, the force
24 bottom end of screw is equipped with force hanging ring 25, and force hanging ring 25 is equipped with counterweight hook 26, is connected with below counterweight hook 26 several
Counterweight 17；By the counterweight 17 in 16 underhung different number of the first force-application block 15 and the second force-application block, to adjust fulcrum
The application pressure of the demonstration lever 13 of 18 two sides of sliding block.
13 both ends of demonstration lever are respectively connected with connecting rod 12, and 12 bottom side of connecting rod is respectively connected with lower pressure ball 11, lower pressure ball 11
Lower section is equipped with compression bar 10, and 10 bottom of compression bar is connected with the first piston plate 8 in first piston cylinder 9, and 9 bottom side of first piston cylinder connects
Siphunculus 6 in succession are equipped with communicating valve 7 on communicating pipe 6, connect 5 bottom side of second piston cylinder, installation in second piston cylinder 5 communicating pipe 6
There is second piston plate 4, dynamics indicating arm 3 connected at the top of second piston plate 4, is equipped with dynamics demonstration board 2 on the upside of dynamics indicating arm 3,
Dynamics demonstration board 2 is mounted on demonstration frame 1.
When the demonstration lever 13 of 18 two sides of fulcrum sliding block occurs because 17 quantity of counterweight that length is different and applies is different
When inclination, open demonstration lever 13 downwards decline side first piston cylinder 9 and second piston cylinder 5 between communicating valve 7, first
Liquid compression rod 10 and first piston plate 8 in piston cylinder 9 are squeezed to be flowed into second piston cylinder 5 along communicating pipe 6, and makes second
Second piston plate 4 and dynamics indicating arm 3 in piston cylinder 5 move upwards, and dynamics indicating arm 3 indicates on dynamics demonstration board 2
Lever principle is well demonstrated so as to intuitively reflect the dynamics when inclination for demonstrating lever 13 in different height position,
Be adjusted convenient for position of the fulcrum, the fulcrum two sides arm of force and the fulcrum two sides stress size to lever, it is convenient with hall demonstration and
Experimental implementation.
For the ease of demonstrating 13 measurement of length of lever to 18 two sides of fulcrum sliding block, it is preferred that in the present embodiment, described
It demonstrates 13 front side bottom of lever and is equipped with point of application graduation mark 21, the force sliding block 23 is equipped with point of application pointer 22, the point of application
Pointer 22 is arranged towards point of application graduation mark 21, conveniently directly reads the position scale that force sliding block 23 is located on demonstration lever 13
Value, to calculate the length of 18 two sides of fulcrum sliding block demonstration lever 13.
The technical principle of the invention is described above in combination with a specific embodiment, is only the preferred embodiment of the present invention.This
The protection scope of invention is not limited merely to above-described embodiment, and all technical solutions belonged under thinking of the present invention belong to the present invention
Protection scope.Those skilled in the art, which does not need to pay for creative labor, can associate other specific realities of the invention
Mode is applied, these modes will fall within the scope of protection of the present invention.
Claims (9)
1. a kind of student lever used for physics principle in-class experiment device, including demonstration frame (1), demonstration lever (13) and supporting point sliding
Block (18), which is characterized in that demonstration lever (13) is equipped with inside demonstration frame (1), demonstration lever (13) upper center offers
Fulcrum sliding slot (31), the interior sliding of fulcrum sliding slot (31) are provided with fulcrum sliding block (18), pass through pin shaft at the top of fulcrum sliding block (18) and cut with scissors
It connects suspending rod (20), connects suspending rod sliding block (29) at the top of suspending rod (20), suspending rod sliding block (29) is slidably arranged in demonstration frame
In sliding slot at the top of frame (1)；
Point of application sliding slot (32) are equipped in the middle part of demonstration lever (13) bottom side, sliding is provided with first in point of application sliding slot (32)
Force-application block (15) and the second force-application block (16), the first force-application block (15) and the second force-application block (16) are force sliding block (23), are applied
Force screw (24) is threaded in the middle part of power sliding block (23), force screw (24) bottom end is equipped with force hanging ring (25), and force is hung
Ring (25) is equipped with counterweight hook (26), is connected with several counterweights (17) below counterweight hook (26).
2. student according to claim 1 lever used for physics principle in-class experiment device, which is characterized in that the demonstration frame
Frame (1) is the body structure that front side is set as opening.
3. student according to claim 2 lever used for physics principle in-class experiment device, which is characterized in that the supporting point sliding
Slot (31) section is in " convex " font, and fulcrum sliding block (18) two sides are equipped with locking screw (30), and locking screw (30) is screwed
In screw hole on fulcrum sliding block (18).
4. student according to claim 3 lever used for physics principle in-class experiment device, which is characterized in that suspending rod (20)
Bottom is equipped with dial (19), and dial (19) is equipped with the scale for identifying angle, the connection of fulcrum sliding block (18) top
Have dial needle (27), dial needle (27) is directed toward the scale on dial (19).
5. student according to claim 1 lever used for physics principle in-class experiment device, which is characterized in that demonstration lever
(13) it is telescopic rod, is equipped in the middle part of telescopic rod and adjusts screw (28).
6. student according to claim 4 lever used for physics principle in-class experiment device, which is characterized in that demonstration frame
(1) for the sliding slot at the top of in " convex " font structure, suspending rod sliding block (29) is equipped with the locking screw (30) that screw thread is connected.
7. student according to claim 6 lever used for physics principle in-class experiment device, which is characterized in that the demonstration thick stick
Bar (13) forward upper is equipped with fulcrum graduation mark (14), and demonstration lever (13) front side bottom is equipped with point of application graduation mark (21), applies
Power sliding block (23) is equipped with point of application pointer (22), and point of application pointer (22) is arranged towards point of application graduation mark (21).
8. student according to claim 7 lever used for physics principle in-class experiment device, which is characterized in that force sliding block
(23) it is slidably arranged in inverted " convex " font point of application sliding slot (32).
9. -8 any student's lever used for physics principle in-class experiment device according to claim 1, which is characterized in that described
Demonstration lever (13) both ends are respectively connected with connecting rod (12), and connecting rod (12) bottom side is respectively connected with lower pressure ball (11), under lower pressure ball (11)
Side is equipped with compression bar (10), and compression bar (10) bottom is connected with the first piston plate (8) in first piston cylinder (9), first piston cylinder
(9) bottom side connects pipe (6), is equipped on communicating pipe (6) communicating valve (7), and communicating pipe (6) connects second piston cylinder (5) bottom
Side, second piston cylinder (5) is interior to be equipped with second piston plate (4), connects dynamics indicating arm (3) at the top of second piston plate (4), dynamics
Dynamics demonstration board (2) are equipped on the upside of indicating arm (3), dynamics demonstration board (2) is mounted in demonstration frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132963.XA CN109637301A (en) | 2019-02-22 | 2019-02-22 | A kind of student's lever used for physics principle in-class experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132963.XA CN109637301A (en) | 2019-02-22 | 2019-02-22 | A kind of student's lever used for physics principle in-class experiment device |
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| Publication Number | Publication Date |
|---|---|
| CN109637301A true CN109637301A (en) | 2019-04-16 |
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ID=66065783
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910132963.XA Pending CN109637301A (en) | 2019-02-22 | 2019-02-22 | A kind of student's lever used for physics principle in-class experiment device |
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| CN (1) | CN109637301A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402687A (en) * | 2020-03-26 | 2020-07-10 | 王学荣 | A multi-functional teaching aid for high school physics teaching demonstration |
| CN111710221A (en) * | 2020-07-06 | 2020-09-25 | 薛皓元 | All-in-one experimental teaching demonstration device and demonstration method |
| CN112472190A (en) * | 2020-10-15 | 2021-03-12 | 中国人民解放军陆军军医大学第一附属医院 | Postoperative back fixing and compressing device |
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| DE202006002425U1 (en) * | 2006-02-15 | 2006-05-04 | Böttcher, Wolfgang | Demonstration device or toy for obtaining fluid vortex, comprising fluid receiving vessel, preferably of acrylic glass, with outlet in base, to which tangential flow of fluid is supplied |
| CN103730044A (en) * | 2012-10-11 | 2014-04-16 | 阿哈甫·叶金汉 | Physics teaching integrated demonstrator |
| CN107731063A (en) * | 2017-11-22 | 2018-02-23 | 任宝亮 | A kind of physics teaching balance experiment teaching aid |
| CN107784902A (en) * | 2017-11-22 | 2018-03-09 | 饶名梅 | A kind of high school physicses combination experiment teaching aid |
| CN108109486A (en) * | 2017-12-19 | 2018-06-01 | 彭芙贞 | A kind of physics teaching lever dynamics apparatus for demonstrating |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2235643Y (en) * | 1994-03-31 | 1996-09-18 | 张治栋 | Audio-visual demonstration instrument for teaching purpose |
| CN2400854Y (en) * | 1999-12-10 | 2000-10-11 | 纪峰 | Hydraulic analogue voltage demonstrator |
| DE202006002425U1 (en) * | 2006-02-15 | 2006-05-04 | Böttcher, Wolfgang | Demonstration device or toy for obtaining fluid vortex, comprising fluid receiving vessel, preferably of acrylic glass, with outlet in base, to which tangential flow of fluid is supplied |
| CN103730044A (en) * | 2012-10-11 | 2014-04-16 | 阿哈甫·叶金汉 | Physics teaching integrated demonstrator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402687A (en) * | 2020-03-26 | 2020-07-10 | 王学荣 | A multi-functional teaching aid for high school physics teaching demonstration |
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| CN112472190A (en) * | 2020-10-15 | 2021-03-12 | 中国人民解放军陆军军医大学第一附属医院 | Postoperative back fixing and compressing device |
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Application publication date: 20190416 |