CN203849909U - Mathematic cambered surface demonstration teaching aid - Google Patents
Mathematic cambered surface demonstration teaching aid Download PDFInfo
- Publication number
- CN203849909U CN203849909U CN201420270927.2U CN201420270927U CN203849909U CN 203849909 U CN203849909 U CN 203849909U CN 201420270927 U CN201420270927 U CN 201420270927U CN 203849909 U CN203849909 U CN 203849909U
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- CN
- China
- Prior art keywords
- pillar
- rocking arm
- teaching aid
- plate
- parabolical
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A mathematic cambered surface demonstration teaching aid belongs to the field of teaching tools and solves the problems that no model teaching aid for demonstrating saddle surface formation is currently available and understanding of students on a saddle surface cannot be facilitated. The teaching aid comprises a base plate, a pillar, a rocking arm and a parabola. The pillar is vertically arranged on the base plate. The front and the back of the pillar are respectively provided with a reinforcing plate. The left side and the right side of each reinforcing plate are respectively provided with a reinforcing plate. A shaft hole is arranged on the upper end of the pillar. The rocking arm comprises two straight plates which are connected through a connecting plate. A rotating shaft is arranged between the two straight plates. The rotating shaft is arranged inside the shaft hole of the rocking arm and connected with the pillar in a rotary way. The lower end of each straight plate is provided with a suspension pendant A. The upper end of each straight plate is provided with a rotary ring. The parabola passes through the two rotary rings on the rocking arm. The midpoint lower side of the parabola is fixedly connected with a suspension pendant B. Blocking sheets are arranged on the parabola parts located on the two sides of each rotary ring. The teaching aid is used for demonstrating saddle surface formation.
Description
Technical field
The utility model belongs to educational aid field, is specifically related to a kind of mathematics curved surface demonstration teaching aid.
Background technology
Saddle face is a kind of curved surface, is again hyperbolic paraboloid.Shape is similar to saddle.On XZ face, construct the para-curve of an opening upwards, construct the para-curve that Open Side Down on YZ face, two parabolical tops overlap, and then allow Article 1 para-curve slide on another para-curve, have just formed saddle face.Do not demonstrate at present the model teaching aid that saddle face forms, be unfavorable for the understanding of student to saddle face.
Summary of the invention
The purpose of this utility model is not demonstrate in order to solve the model teaching aid that saddle face forms at present, is unfavorable for the problem of the understanding of student to saddle face, and a kind of mathematics curved surface demonstration teaching aid is provided, and its technical scheme is as follows:
A kind of mathematics curved surface demonstration teaching aid, it comprises base plate, pillar, rocking arm and parabolical line, pillar is vertically set on base plate, gusset plate respectively arrange one in the both sides, front and back of pillar before and after, before and after every gusset plate a left and right gusset plate is each side set, be provided with axis hole in the upper end of pillar; Described rocking arm comprises two straight plates and connects and composes by web joint, between two straight plates, is provided with rotating shaft, and rotating shaft is arranged in the axis hole of rocking arm and is rotationally connected with pillar, is provided with outstanding pendant A in the lower end of every straight plate, is provided with change in the upper end of every straight plate; Described parabolical line is by passing in two changes on rocking arm, the mid point downside of parabolical line is fixedly connected with outstanding pendant B, the outstanding pendant B that parabolical line downside connects is arranged between two straight plates of rocking arm, and the both sides that are positioned at each change on parabolical line are provided with catch.
The beneficial effects of the utility model are: simple in structure, cost of manufacture is low, can demonstrate the formation of saddle face, deepen the understanding of student to saddle face, improve the effect of giving lessons.
Brief description of the drawings:
Fig. 1 is the new structural representation of this practicality;
Fig. 2 is the lower part enlarged diagram of Fig. 1;
Fig. 3 is the upper part enlarged diagram of Fig. 1;
Fig. 4 is decomposing schematic representation of the present utility model;
Fig. 5 is schematic diagram of the present utility model.
Embodiment:
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of mathematics curved surface demonstration teaching aid, it comprises base plate 1, pillar 2, rocking arm 3 and parabolical line 4, pillar 2 is vertically set on base plate 1, gusset plate 2-1 respectively arrange one in the both sides, front and back of pillar 2 before and after, before and after every gusset plate 2-1 a left and right gusset plate 2-2 is each side set, be provided with axis hole 2-3 in the upper end of pillar 2; Described rocking arm 3 comprises two straight plate 3-1 and connects and composes by web joint 3-2, between two straight plate 3-1, be provided with rotating shaft 3-3, rotating shaft 3-3 is arranged in the axis hole 2-3 of rocking arm 3 and is rotationally connected with pillar 2, be provided with outstanding pendant A3-4 in the lower end of every straight plate 3-1, be provided with change 3-5 in the upper end of every straight plate 3-1; Described parabolical line 4 is by passing in two change 3-5 on rocking arm 3, the mid point downside of parabolical line 4 is fixedly connected with outstanding pendant B4-1, the outstanding pendant B4-1 that parabolical line 4 downsides connect is arranged between two straight plate 3-1 of rocking arm 3, and the both sides that are positioned at each change 3-5 on parabolical line 4 are provided with catch 3-6.
The utility model can all adopt stainless steel to make except outstanding pendant A3-4 and outstanding pendant B4-1, prevent from getting rusty and attractive in appearance, outstanding pendant A3-4 and outstanding pendant B4-1 can adopt lead or the copper billet etc. that proportion is larger, in order not stop rocking arm 3, make the smooth and easy swing of rocking arm 3, left and right gusset plate 2-2 should be near the arranged outside of front and back gusset plate 2-1.
The using method of utility model and principle: only need to promote rocking arm 3 rocking arm 3 is slowly swung, can demonstrate the formation of saddle face; Parabolical line 4 in the utility model represents the Article 1 para-curve of constructing an opening upwards on XZ face; in rocking arm 3 swing process, another para-curve that Open Side Down is constructed in the track 3-7 of parabolical line 4 mid points representative on YZ face; two parabolical tops overlap; rocking arm 3 is that Article 1 para-curve slides on another para-curve while swing; just demonstrated the formation of saddle face, and the outstanding pendant of parabolical line 4 downsides makes parabolical line 4 in rocking arm 3 swing process, make to keep eventually opening upwards.
Claims (3)
1. a mathematics curved surface demonstration teaching aid, it is characterized in that it comprises base plate (1), pillar (2), rocking arm (3) and parabolical line (4), pillar (2) is vertically set on base plate (1), gusset plate (2-1) respectively arrange one in the both sides, front and back of pillar (2) before and after, before and after every gusset plates (2-1) a left and right gusset plate (2-2) is each side set, be provided with axis hole (2-3) in the upper end of pillar (2); Described rocking arm (3) comprises two straight plates (3-1) and connects and composes by web joint (3-2), between two straight plates (3-1), be provided with rotating shaft (3-3), rotating shaft (3-3) is arranged in the axis hole (2-3) of rocking arm (3) and is rotationally connected with pillar (2), be provided with outstanding pendant A (3-4) in the lower end of every straight plate (3-1), be provided with change (3-5) in the upper end of every straight plate (3-1); Described parabolical line (4) is by passing in two changes (3-5) on rocking arm (3), the mid point downside of parabolical line (4) is fixedly connected with outstanding pendant B (4-1), and the outstanding pendant B (4-1) that parabolical line (4) downside connects is arranged between two straight plates (3-1) of rocking arm (3).
2. a kind of mathematics curved surface demonstration teaching aid as claimed in claim 1, is characterized in that the both sides that are positioned at each change (3-5) on parabolical line (4) are provided with catch (3-6).
3. a kind of mathematics curved surface demonstration teaching aid as claimed in claim 1, is characterized in that the arranged outside of left and right gusset plate (2-2) near front and back gusset plates (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270927.2U CN203849909U (en) | 2014-05-24 | 2014-05-24 | Mathematic cambered surface demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270927.2U CN203849909U (en) | 2014-05-24 | 2014-05-24 | Mathematic cambered surface demonstration teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203849909U true CN203849909U (en) | 2014-09-24 |
Family
ID=51562894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420270927.2U Expired - Fee Related CN203849909U (en) | 2014-05-24 | 2014-05-24 | Mathematic cambered surface demonstration teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203849909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679154A (en) * | 2016-04-07 | 2016-06-15 | 齐齐哈尔大学 | Mechanics experimental instrument of rotation paraboloid |
-
2014
- 2014-05-24 CN CN201420270927.2U patent/CN203849909U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679154A (en) * | 2016-04-07 | 2016-06-15 | 齐齐哈尔大学 | Mechanics experimental instrument of rotation paraboloid |
| CN105679154B (en) * | 2016-04-07 | 2018-08-28 | 齐齐哈尔大学 | A kind of mechanics experiment instrument of the paraboloid of revolution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20150524 |
|
| EXPY | Termination of patent right or utility model |