CN202584500U - Frictional force demonstrator with amplification indication function - Google Patents
Frictional force demonstrator with amplification indication function Download PDFInfo
- Publication number
- CN202584500U CN202584500U CN 201220224306 CN201220224306U CN202584500U CN 202584500 U CN202584500 U CN 202584500U CN 201220224306 CN201220224306 CN 201220224306 CN 201220224306 U CN201220224306 U CN 201220224306U CN 202584500 U CN202584500 U CN 202584500U
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- friction
- base
- friction member
- frictional force
- support
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Abstract
The utility model belongs to a teaching aid, in particular to a frictional force demonstrator with an amplification indication function. The frictional force demonstrator comprises a bracket (1), a friction piece (2) and a sliding block (3), wherein the friction piece (2) is movably connected with the bracket (1), a rack (8) is connected to a spring scale (4), an index dial (5) and a pointer (7) are arranged above the rack (8), a gearwheel (6) is fixed on the pointer (7), the gearwheel (6) is engaged with the rack (8), the friction piece (2) is shaped as a triangular prism, three side surfaces of the friction piece (2) are provided with different frictional materials, a base (13) is arranged on the bracket (1), the top of the base (13) is provided with a V-shaped notch, and the friction piece (2) is erected on the V-shaped notch of the base (13). The frictional force demonstrator disclosed by the utility model not only has the capability of enabling students to see the change of the pointer indicating the frictional force, but also provides convenience to research the frictional coefficient of the friction surface and the relationship between the positive pressure of the sliding block and the frictional force.
Description
Technical field
The utility model belongs to teaching aid, particularly a kind of friction force demonstration device with amplification deixis.
Background technology
Two objects that contact with each other when they will take place or relative motion take place, will produce a kind of power that hinders relative motion on surface of contact, this power just is called friction force.The innovation and creation that on January 25th, 2012, disclosed application number was 201120259499.X disclose a kind of friction force demonstration device; This apparatus for demonstrating comprises base, spring balance, be arranged on winch on the base, be arranged on the friction member on the base removably and be placed on the slide block on the friction member; Spring balance one end is fixedly installed on the slide block, and the spring balance other end is connected with the backguy of winch is detachable.This scheme moves demonstration friction through the winch driving sliding block on friction member; Can realize demonstration through different slide blocks and friction member cooperation, can make the motion of pulling slide block be tending towards linear uniform motion, the spring balance reading can not changed significantly stiction, force of sliding friction and force of rolling friction; But when demonstration friction and surface of contact degree of roughness concern; Need to change surface of contact, troublesome poeration, and also spring balance shows that the most student of reading can't see.
The utility model content
The purpose of the utility model provides a kind of friction force demonstration device that amplifies deixis that has, and when the teacher demonstrated this device on the dais, the student can know the variation of the pointer of seeing indication friction force size.
The scheme that the utility model solve the technical problem is: a kind of friction force demonstration device with amplification deixis, comprise support, and friction member is set on the support; The upper surface of friction member is provided with slide block, and slide block links to each other with spring balance, and said friction member and support flexibly connect; Said spring balance is connected with tooth bar; The top of tooth bar is provided with index dial and pointer, is fixed with gear on the pointer, the wheel and rack engagement.
The utility model can convert the elongation of spring balance spring to pointer and rotate, and reading is amplified, and visibility, degree directly perceived are strengthened greatly.
As further technical scheme, said friction member is triangular prism shaped, and three sides of friction member are provided with different friction materials, on the said support base are set, and the top of base has v-notch, and the friction member frame is on the v-notch of base.
It is triangular prism shaped that friction member is, and three sides of friction member are provided with different friction materials, and convenient conversion rubbing surface simultaneously, is fixed on friction member on the base easily, makes the friction member can double swerve.
As further technical scheme again, on the said support draw-in groove is set, base is positioned on the draw-in groove, and base can move on draw-in groove.
As further technical scheme again, laterally offer through hole on the said support, the right ends of said friction member all is fixed with straight-bar, and one of them straight-bar is inserted in the through hole.
The convenient conversion of this scheme rubbing surface, during conversion, with base move apart friction member under, rotate straight-bar, adjust rubbing surface after, again with base retract friction member under, let friction member be fixed on the base.
As technical scheme further, the top of said slide block is provided with depression, places weight in the depression.
This scheme can be adjusted the pressure of slide block to rubbing surface, the relation between research pressure and the friction force size.
In sum, the utlity model has simple in structure, advantages of simple operation, can not only let the student know and see the variation of indicating the big or small pointer of friction force, the friction factor of also convenient research rubbing surface and the relation between slide block normal pressure and the friction force.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the enlarged drawing of A portion among Fig. 1;
Fig. 3 is the annexation synoptic diagram of the utility model friction member and support.
Embodiment
Shown in Fig. 1～3, a kind of friction force demonstration device with amplification deixis comprises support 1; Friction member 2 is set on the support 1, and friction member 2 is triangular prism shaped, and three sides of friction member 2 are provided with different friction materials; Friction member 2 flexibly connects with support 1; The upper surface of friction member 2 is provided with slide block 3, and the top of slide block 3 is provided with depression 9, places weight 10 in the depression 9.Slide block 3 links to each other with spring balance 4, and spring balance 4 is connected with tooth bar 8, and the top of tooth bar 8 is provided with index dial 5 and pointer 7, is fixed with gear 6 on the pointer 7, gear 6 and tooth bar 8 engagements.
Claims (5)
1. one kind has the friction force demonstration device that amplifies deixis; Comprise support (1), friction member (2) is set on the support (1), the upper surface of friction member (2) is provided with slide block (3); Slide block (3) links to each other with spring balance (4); It is characterized in that: said friction member (2) flexibly connects with support (1), and said spring balance (4) is connected with tooth bar (8), and the top of tooth bar (8) is provided with index dial (5) and pointer (7); Be fixed with gear (6) on the pointer (7), gear (6) and tooth bar (8) engagement.
2. a kind of friction force demonstration device that amplifies deixis that has as claimed in claim 1; It is characterized in that: said friction member (2) is triangular prism shaped; Three sides of friction member (2) are provided with different friction materials; Base (13) is set on the said support (1), and the top of base (13) has v-notch, and friction member (2) frame is on the v-notch of base (13).
3. a kind of friction force demonstration device that amplifies deixis that has as claimed in claim 2, it is characterized in that: draw-in groove (14) is set on the said support (1), and base (13) is positioned on the draw-in groove (14), and base (13) can be gone up at draw-in groove (14) and move.
4. like claim 2 or 3 described a kind of friction force demonstration devices that amplify deixis that have; It is characterized in that: laterally offer through hole (12) on the said support (1); The right ends of said friction member (2) all is fixed with straight-bar (11), and one of them straight-bar (11) is inserted in the through hole (12).
5. a kind of friction force demonstration device that amplifies deixis that has as claimed in claim 1, it is characterized in that: the top of said slide block (3) is provided with depression (9), places weight (10) in the depression (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220224306 CN202584500U (en) | 2012-05-17 | 2012-05-17 | Frictional force demonstrator with amplification indication function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220224306 CN202584500U (en) | 2012-05-17 | 2012-05-17 | Frictional force demonstrator with amplification indication function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202584500U true CN202584500U (en) | 2012-12-05 |
Family
ID=47253888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220224306 Expired - Fee Related CN202584500U (en) | 2012-05-17 | 2012-05-17 | Frictional force demonstrator with amplification indication function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202584500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI475195B (en) * | 2013-12-09 | 2015-03-01 | ||
| CN106023736A (en) * | 2016-07-30 | 2016-10-12 | 董亚伦 | Physics teaching aid |
-
2012
- 2012-05-17 CN CN 201220224306 patent/CN202584500U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI475195B (en) * | 2013-12-09 | 2015-03-01 | ||
| CN106023736A (en) * | 2016-07-30 | 2016-10-12 | 董亚伦 | Physics teaching aid |
| CN106023736B (en) * | 2016-07-30 | 2018-10-12 | 广州迅云教育科技有限公司 | Physics teaching teaching aid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130517 |