CN214189104U

CN214189104U - Cycloid demonstration teaching aid for advanced math teaching

Info

Publication number: CN214189104U
Application number: CN202020787829.1U
Authority: CN
Inventors: 杨云雯; 李绪陵; 李夏; 何敏
Original assignee: Hubei College of Chinese Medicine
Current assignee: Hubei College of Chinese Medicine
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-09-14
Anticipated expiration: 2030-05-13

Abstract

The utility model discloses a higher mathematics teaching is with cycloid demonstration teaching aid relates to teaching tool technical field, especially relates to a higher mathematics teaching is with cycloid demonstration teaching aid, including support, slider and rolling disc. The bracket is provided with an air blowing mechanism for continuously releasing air, and the air blowing mechanism can drive the sliding block to move; a first connecting rod is connected between the sliding block and the rolling disc; the rolling disc is provided with pen holes and a scraper and rolls on the support. The technical scheme of the utility model can realize cleaing away the technological effect of stereoplasm granule and dust on the drawing board, has solved the discontinuous technical problem of orbit when leading to drawing the cycloid because of stereoplasm granule and dust on the drawing board.

Description

Cycloid demonstration teaching aid for advanced math teaching

Technical Field

The utility model relates to a teaching tool technical field especially relates to a cycloid demonstration teaching aid for advanced math teaching.

Background

In the prior teaching, cycloid drawing is mainly performed by dividing a drawing point connecting line into a set square, a compass, a curve plate and a rolling circle, so that the drawing speed is slow, and the forming process of cycloid cannot be displayed, which is not beneficial to understanding of students.

Chinese patent (publication No. CN205984018U) discloses a cycloid demonstration teaching aid for advanced math teaching, which comprises supporting legs, main part and disc rolling element, the landing leg is all installed to the bottom left and right sides of main part, the drawing board groove has been seted up on the positive upper portion of main part, the spout has been seted up to the positive lower part of main part, spout fit in slides and is equipped with the slider, the drawing board inslot is equipped with the disc rolling element, a plurality of pen inserting holes have been seted up at the back of disc rolling element, the inboard in pen inserting hole still is equipped with the spring, the front of disc rolling element still is equipped with the sign piece, the positive middle part of disc rolling element is passed through the bearing and is connected with the first horizontal part rotation of action bars, be equipped with threaded connection locking screw on the slider on the second horizontal part of action bars, the vertical portion.

Although above-mentioned scheme can draw out the cycloid fast conveniently, the cycloid demonstration only has several when learning in daily teaching, and after accomplishing the study, the demonstration teaching aid can deposit a schooling period once more or just can reuse after a whole year, and at its in-process of depositing, can be infected with stereoplasm granule or dust on the drawing board, cleans before using at every turn and can occupy a large amount of time to can forget and lead to classroom teaching demonstration effect poor unavoidably.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the current demonstration teaching aid leads to demonstrating the effect difference because of having stereoplasm granule or dust. In order to realize the purpose, the technical scheme of the utility model is as follows:

a cycloid demonstration teaching aid for advanced math teaching comprises a support, a sliding block and a rolling disc, wherein an air blowing mechanism for continuously releasing air is arranged on the support and can drive the sliding block to move; a first connecting rod is connected between the sliding block and the rolling disc; the rolling disc is provided with pen holes and a scraper and rolls on the support.

The scraper blade in the above-mentioned scheme can scrape stereoplasm granule and dust in the chalk direction of advance, the mechanism of blowing can be at the scraper blade clean the in-process and last the drawing board of scraping one side of scraping the scraper blade and blow, thereby can keep the cleanness of drawing board, drive the slider motion through the mechanism of blowing, the slider drives the motion of rolling disc again, thereby teacher's teaching intensity has been reduced, can also make teaching demonstration complete in succession, the problem that the cycloid that the chalk was drawn because of the influence of stereoplasm granule on the drawing board and dust is inaccurate has been solved simultaneously, teaching demonstration effect has been promoted.

Further, the air blowing mechanism includes: the inner part of the cavity is hollow, and the piston, the second connecting rod and the hand-operated screw rod are arranged in the cavity; the interior of the cavity is divided into an upper accommodating space and a lower accommodating space by a piston, the upper accommodating space and the lower accommodating space are both provided with an air suction port and an air outlet, and the air suction port is provided with an elastic sheet which is positioned in the cavity and can completely cover the air suction port; the air outlets are connected with first air outlet hoses which are connected with one-way valves, the other ends of the two one-way valves are connected with a Y-shaped second air outlet hose, and the free end of the second air outlet hose penetrates through the first connecting rod and faces the scraper; a piston rod is integrally formed on the lower surface of the piston, the piston rod penetrates through the lower wall of the cavity, and the lower end of the piston rod is hinged with one end of the second connecting rod; the other end of the second connecting rod is sleeved on the hand-cranking screw rod; the hand-operated screw rod is in threaded connection with the sliding block.

The two containing spaces can alternately suck and discharge air, and the gas output is ensured in the working process. The two one-way valves can prevent the second air outlet hose from sucking hard particles and dust, and ensure the normal work of the piston. The free end of the second air outlet hose penetrates through the first connecting rod and faces the scraper plate, so that the second air outlet hose can be prevented from being wound on the first connecting rod during work. The teacher lies in demonstration teaching aid side when rotating hand screw, can not shelter from the student to the observation of cycloid drawing process.

Furthermore, the scraper blade is provided with a circular ring, and the free end of the second air outlet hose penetrates through the circular ring, so that the free end always blows air towards the scraper blade, and the scraped hard particles and dust can be blown away.

Furthermore, the chalk hole is a through hole with a chalk fixing block and a first spring arranged inside, one end of the chalk hole is in threaded connection with a hand screwing plug, the chalk fixing block is provided with a chalk fixing hole with inclination, and the first spring is compressed between the chalk fixing block and the hand screwing plug. By the scheme, the chalk can be conveniently disassembled and assembled, and is not easy to incline and break due to the fact that the chalk is placed in the chalk fixing block.

Furthermore, the lower end of the first connecting rod penetrates through the sliding block and is in threaded connection with a hand-screwed nut which is located below the sliding block. The nuts are screwed by adjusting hands, so that the rolling disc does not slide when rolling, and the drawn cycloid effect is better.

Compared with the prior art, the scheme has the following beneficial effects:

hard particles and dust on the drawing board can be simply and effectively removed, drawn cycloids are continuous and good in effect, the workload of teachers is reduced, and meanwhile, the beneficial effects that students can conveniently observe the cycloids in the drawing process and the chalk is convenient to disassemble and assemble are achieved.

Drawings

FIG. 1 is a diagram of an assembly structure according to an embodiment of the present invention;

FIG. 2 is a structural diagram of an air blowing mechanism according to an embodiment of the present invention;

FIG. 3 is a block diagram of a rolling disk in an embodiment of the invention;

in the figure: 1. a support; 2. a slider; 3. rolling the disc; 6. a first link; 8. screwing a screw plug by hand; 9. screwing the nut by hand; 10. a chalk fixing block; 31. a squeegee; 32. a second spring; 41. a cavity; 42. a piston; 43. a second link; 44. hand-cranking screw; 45. a one-way valve.

Detailed Description

In the following description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "back", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 and 3 show a cycloid demonstration teaching aid for advanced math teaching, which comprises a support 1, a rolling disc 3 and an air blowing mechanism. The bracket 1 is provided with a groove, and a horizontal sliding groove is arranged below the groove. The recess is used for placing the drawing board. The rolling disc 3 rolls on the lower surface of the groove, and the outer edge of the rolling disc 3 and the lower surface of the groove are both provided with a layer of rubber, so that friction can be increased, and rolling is facilitated. Be provided with a hole and scraper blade 31 on the rolling disc 3, the hole is located the diameter of 3 vertical directions on the rolling disc, and the hole is the circular through-hole that inside was provided with chalk fixed block 10 and first spring, and the screw plug 8 is twisted to the hand to the screw thread connection in front of the hole. The outer diameter of the chalk fixing block 10 is consistent with the diameter of the chalk hole, the axis of the chalk fixing block is provided with a chalk fixing hole, the chalk fixing hole is a through hole with the same inclination as that of the chalk, and two ends of the chalk can extend out of the chalk fixing block. The first spring is compressed between the chalk fixing block 10 and the hand screw plug 8. The scraper 31 is horizontally hinged to the rear side surface of the rolling disc 3, a second spring 32 is connected between the scraper 31 and the rolling disc 3, and the scraper 31 is always in contact with the drawing board through the second spring 32 so as to ensure that the scraper 31 can scrape off hard particles and dust on a chalk advancing track; the surface of the scraper 31 on the side facing away from the chalk is fixedly provided with a circular ring parallel to the rear surface of the rolling disk 3. The bearing is arranged at the center of the rolling disc 3, so that the rolling disc 3 can move more stably, drawn cycloids are smoother, the inner ring of the bearing is connected with the first connecting rod 6 in an L shape, the other end of the first connecting rod 6 penetrates through the sliding block 2, the sliding block 2 moves in the horizontal sliding groove, the lower end of the first connecting rod 6 is connected with the hand screwing nut 9 in a threaded manner, and the hand screwing nut 9 is attached to the lower surface of the sliding block 2.

As shown in fig. 1 and 2, the blowing mechanism is fixedly arranged on the right side of the bracket 1, and the blowing mechanism sequentially comprises from top to bottom: a hollow cavity 41, a piston 42, a second connecting rod 43 and a hand screw 44. The interior of the cavity 41 is divided into an upper sealed accommodating space and a lower sealed accommodating space by the piston 42, the side walls of the upper accommodating space and the lower accommodating space are respectively provided with an air suction port and an air outlet, and the air suction ports are respectively and fixedly provided with an elastic sheet which is positioned in the cavity 41 and can completely cover the air suction ports; the air outlets are connected with first air outlet hoses, the two first air outlet hoses are connected with one-way valves 45, air at the positions of the one-way valves 45 can only be discharged from the cavity 41, the other ends of the two one-way valves 45 are connected with the same Y-shaped second air outlet hose, the second air outlet hose comprises a Y-shaped three-way air pipe quick connector and three hoses, and the free end of the second air outlet hose penetrates through the first connecting rod 6 to reach the rear side of the rolling disc 3 and penetrates through a circular ring on the scraper 31; a piston rod is integrally formed on the lower surface of the piston 42, the piston rod penetrates through the lower wall of the cavity 41, and the lower end of the piston rod is hinged with one end of the second connecting rod 43; the other end of the second connecting rod 43 is sleeved on the hand-cranking screw rod 44, and the hand-cranking screw rod 44 can rotate around the axis of the hand-cranking screw rod relative to the second connecting rod 43; the hand-operated screw rod 44 is Z-shaped and is in threaded connection with the sliding block 2, and two ends of the hand-operated screw rod 44 penetrate through the left side and the right side of the horizontal sliding groove and can rotate around the axis of the hand-operated screw rod 44 relative to the support 1.

The specific operation is as follows:

when a cycloid curve needs to be drawn, a drawing board is installed in the groove, then the hand-operated screw 44 is rotated, the hand-operated screw 44 and the sliding block 2 are in threaded transmission to enable the sliding block 2 to move leftwards, the sliding block 2 drives the first connecting rod 6 and the rolling disk 3 to move leftwards together, due to the fact that friction force exists between the lower surface of the groove and the outer edge of the rolling disk 3, the rolling disk 3 rolls in the groove, and meanwhile the rolling disk 3 rotates relative to the first connecting rod 6. When the rolling disc 3 rolls, the scraper 31 scrapes off the existing hard particles and dust by adhering to the drawing board, and the chalk arranged in the upper pen hole draws a cycloid line.

When hand screw 44 made slider 2 slide left, hand screw 44 drove second connecting rod 43 up-and-down motion, when second connecting rod 43 upward movement, promote piston 42 upward movement, the gas in cavity 41 upper portion accommodation space is compressed, upper portion accommodation space's internal pressure increases, the flexure strip that promotes upper portion accommodation space closes with the induction port lid (the state of two flexure strips when this demonstration teaching aid does not work is unified in the preceding, only explain the condition of two flexure strips during operation here), when piston 42 continues the motion, the gas in upper portion accommodation space is discharged from the check valve, discharge to scraper blade 31 department through the second air outlet hose, blow away the stereoplasm granule and the dust of being scraped. When the second connecting rod 43 moves downwards, the piston 42 is pulled to move downwards, the pressure of the upper accommodating space of the cavity 41 is reduced, the elastic sheet of the upper accommodating space is pushed open by the external atmospheric pressure, and air enters the upper accommodating space; the working principle of the lower accommodating space is the same as that of the upper accommodating space, and only the working sequence is different. Can realize continuous blowing in the process of drawing the cycloid, blow off the scraped hard particles and dust in time,

when the chalk needs to be replaced, the chalk can be replaced only by screwing the screw plug 8 off from the pen hole and taking out the spring and the chalk fixing block 10 inside. The replacement is very convenient.

When the rolling disc 3 slides on the lower surface of the groove, the hand nut 9 can be appropriately screwed, so that the first connecting rod 6 and the rolling disc 3 connected with the first connecting rod move downwards to solve the sliding phenomenon; when the rolling disk 3 can neither slide nor roll on the lower surface of the groove, the hand nut 9 can be loosened appropriately to solve the above-mentioned problem.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A cycloid demonstration teaching aid for advanced math teaching comprises a bracket (1), a sliding block (2) and a rolling disc (3); the method is characterized in that: the bracket (1) is provided with an air blowing mechanism for continuously releasing air, and the air blowing mechanism can drive the sliding block (2) to move on the bracket; a first connecting rod (6) is connected between the sliding block (2) and the rolling disc (3); the rolling disc (3) is provided with pen holes and a scraper (31), and the rolling disc (3) rolls on the support (1).

2. The cycloid demonstration teaching aid for higher mathematics teaching of claim 1, wherein: the blowing mechanism includes: a hollow cavity (41), a piston (42), a second connecting rod (43) and a hand-cranking screw rod (44); the interior of the cavity (41) is divided into an upper accommodating space and a lower accommodating space by a piston (42), the upper accommodating space and the lower accommodating space are both provided with an air suction port and an air outlet, and the air suction port is provided with an elastic sheet which is positioned in the cavity (41) and can completely cover the air suction port; the air outlets are connected with first air outlet hoses, the first air outlet hoses are connected with one-way valves (45), the other ends of the two one-way valves (45) are connected with the same Y-shaped second air outlet hose, and the free end of the second air outlet hose penetrates through the first connecting rod (6) and faces the scraper (31); a piston rod is integrally formed on the lower surface of the piston (42), the piston rod penetrates through the lower wall of the cavity (41), and the lower end of the piston rod is hinged with one end of a second connecting rod (43); the other end of the second connecting rod (43) is sleeved on the hand-operated screw rod (44); the hand-operated screw (44) is in threaded connection with the sliding block (2).

3. The cycloid demonstration teaching aid for higher mathematics as claimed in claim 2, wherein: the scraper (31) is provided with a circular ring, and the free end of the second air outlet hose penetrates through the circular ring.

4. The cycloid demonstration teaching aid for higher mathematics teaching of claim 1, wherein: the chalk hole is a through hole with a chalk fixing block (10) and a first spring arranged inside, one end of the chalk hole is in threaded connection with a hand screwing screw plug (8), the chalk fixing block (10) is provided with a chalk fixing hole with inclination, and the first spring is compressed between the chalk fixing block (10) and the hand screwing screw plug (8).

5. The cycloid demonstration teaching aid for higher mathematics teaching of claim 1, wherein: the lower end of the first connecting rod (6) penetrates through the sliding block (2) and is in threaded connection with a hand-screwed nut (9), and the hand-screwed nut (9) is located below the sliding block (2).