CN109064839B - Cycloid demonstration teaching aid for mathematical education - Google Patents
Cycloid demonstration teaching aid for mathematical education Download PDFInfo
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- CN109064839B CN109064839B CN201811024722.5A CN201811024722A CN109064839B CN 109064839 B CN109064839 B CN 109064839B CN 201811024722 A CN201811024722 A CN 201811024722A CN 109064839 B CN109064839 B CN 109064839B
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
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Abstract
The invention belongs to the technical field of teaching aids, and particularly relates to a cycloid demonstration teaching aid for mathematical teaching, which comprises a first roller, a rack, a limiting block, a movable bracket, a second roller, a supporting plate, a sucker and a fixing module, wherein the second roller is rotatably connected to the lower end of the movable bracket, and rolls along a step surface on one side of the rack; a fixing module is arranged on the first roller; the fixing module is used for fixing chalk; according to the teaching aid, the support plates are arranged below the rack, the suckers are fixedly connected to the support plates, the roller I is rotatably connected to the upper end of the movable support, the two roller II are symmetrically arranged at the lower end of the movable support in the left-right direction, so that a cycloidal track can be drawn on a blackboard, the teaching aid is convenient to move and install, high in flexibility and convenient for teachers to carry during class, students can understand the characteristics of cycloidal tracks by visually observing the formation of the cycloidal tracks, and the teaching quality of the teachers is improved.
Description
Technical Field
The invention belongs to the technical field of teaching aids, and particularly relates to a cycloid demonstration teaching aid for mathematical teaching.
Background
A cycloid is one of the many attractive curves in mathematics, which is defined as follows: a circle slowly rolls along a straight line and the trajectory that a fixed point on the circle passes is called a cycloid. Including special curves such as cycloid among advanced mathematical education, in traditional mathematical education simulation, mr is through drawing a plurality of circularities on the blackboard with the instrument, embody the law of cycloid through the form of finding a point, influence the efficiency of giving lessons in intangible like this, the student understands not very thorough yet, some mr show at the in-process of giving lessons through the picture of doing under class, although solved the condition that need not to draw the circle on class to a certain extent, the study of classmates is not very audio-visual, can not audio-visual stroke of observing the cycloid. Therefore, a teaching aid applied to the formation of the mathematical cycloid is needed to assist the teaching.
Also some cycloid demonstration teaching aids's technical scheme has appeared among the prior art, chinese patent as application number 2017101128186 discloses a cycloid demonstration teaching aid for advanced math teaching, including the blackboard, the cover has the annular chain on the positive first gear of blackboard and the second gear, still be equipped with driving motor between first gear and the second gear, driving motor's output shaft facial make-up is equipped with the driving gear, driving gear and second gear meshing are connected, the below of annular chain is equipped with the rack, the both ends of rack all are equipped with the stopper, even have respectively rather than engaged with work gear between annular chain and the rack, be equipped with the bracing piece in the middle of the bottom of blackboard, the lower extreme of bracing piece is equipped with the bottom plate seat, the bottom outer lane of bottom plate seat is equipped with a plurality of gyro wheels, still cup jointed the sleeve on the bracing piece, telescopic outside circumference is equipped with a plurality of supporting legs.
The technical scheme can realize the generation process of the demonstration cycloid, is convenient for the understanding of the cycloid, but the teaching aid has large volume and is inconvenient for teachers to go to class in a flowing mode, and the teaching aid is inconvenient to carry for high floors of a teaching building although the casters are installed; the rolling realized by the meshing of the gear and the rack can not accurately simulate the real cycloid locus, so that the understanding of the student on the cycloid is influenced, and the teaching quality of a teacher is influenced.
Disclosure of Invention
In order to make up the defects of the prior art, the cycloid demonstrating teaching aid for mathematical teaching is characterized in that a group of supporting plates are arranged below a rack, a group of suckers are fixedly connected to the supporting plates, a first roller is rotationally connected to the upper end of a movable support, two second rollers are symmetrically arranged on the left and right of the lower end of the movable support, a cycloid track is drawn on a blackboard, the teaching aid is convenient to move and install and high in flexibility, a teacher can conveniently carry the teaching aid in class, the formation of the cycloid track can be visually observed, students can understand the characteristics of cycloid, and the teaching quality of the teacher is improved; set up the step face No. one on gyro wheel, No. two step faces on the upper end surface of rack, set up the step face No. one on the gyro wheel and No. two step face contactings on the rack, guaranteed that the gyro wheel rolls on the plane, avoided shaking from top to bottom through the center of a gyro wheel that a wheel and rack meshing lead to, and then lead to the error of cycloid orbit, produce the deviation on understanding for the student, and then influence the teaching quality.
The technical scheme adopted by the invention for solving the technical problems is as follows: the cycloid demonstration teaching aid for mathematical teaching comprises a first roller, a rack and a limiting block, wherein the first roller is meshed with the rack through gear teeth and rolls; two ends of the rack are respectively fixedly connected with a limiting block; the rack is characterized by also comprising a movable support, a second roller, a support plate, a sucker and a fixing module, wherein a group of support plates are arranged below the rack; the upper end of the supporting plate is fixedly connected to the surface of the lower end of the rack, and the supporting plate is fixedly connected with a group of suckers; the first roller is rotatably connected to the upper end of the movable bracket; the lower end of the movable support is symmetrically provided with two second rollers left and right; the second roller is rotatably connected to the lower end of the movable support and rolls along the step surface on one side of the rack; a fixing module is arranged on the first roller; the fixing module is used for fixing chalk; the during operation, paste sucking disc in the backup pad and press hard on the blackboard, the rack is on the blackboard surface through sucking disc fixed connection of below, it removes rack one end to remove the support, fixed module on the rethread gyro wheel fixes the chalk on a gyro wheel, remove the support with the hand promotion, a gyro wheel rolls along rack upper end surface, the orbit of cycloid is drawn on the blackboard to chalk on a gyro wheel simultaneously, this teaching aid is convenient for remove and install, the flexibility is big, make things convenient for the teacher to carry in class time, observe through the formation to the cycloid orbit directly perceivedly, more enable the student to understand the characteristic of cycloid, and then teacher's teaching quality has been improved.
Preferably, the first roller is provided with a first step surface, and the first step surface on the first roller is a cylindrical surface; a second step surface is arranged on the upper end surface of the rack, and the second step surface on the rack is a plane; a first step surface on the first roller is in contact with a second step surface on the rack; during operation, the first step surface on the first roller rolls along the second step surface on the rack, so that the first roller rolls along the plane, the vertical shaking of the center of the first roller caused by the meshing of the first roller and the rack is avoided, errors of cycloid tracks are caused, the students are informed of deviation, and the teaching quality is influenced.
Preferably, the fixed module is slidably mounted on the first roller through a sliding block; the sliding block is slidably mounted in a sliding groove on the first roller, one side of the sliding block is provided with a group of V-shaped grooves, the sliding groove on the first roller is radially arranged, and one side of the sliding groove on the first roller is provided with an extrusion plate; one side of the extrusion plate is provided with a group of V-shaped protrusions, the V-shaped protrusions on the extrusion plate are attached to the V-shaped grooves on the sliding block, and the other side of the extrusion plate is connected with one side of the sliding groove through a spring; during operation can realize adjusting the sliding block behind the compression stripper plate, and then realizes drawing the cycloid of equidimension not on the blackboard, and then can be used for observing the change law between the cycloid of equidimension not, is convenient for further study cycloid's characteristic, and supplementary teacher accomplishes the teaching.
Preferably, the fixed module comprises a rotary cutter head, a transmission hollow shaft, a fixed sleeve, magnets, a cover plate, a spring, a synchronous belt, a fixed gear and a tension wheel, a group of magnets are uniformly embedded on the inner wall of a cylindrical through hole on the sliding block, and the transmission hollow shaft is rotatably connected in the cylindrical through hole of the sliding block; the transmission hollow shaft is made of a non-magnetic conductive material, one end of the transmission hollow shaft is fixedly connected with the rotary cutter head, and the other end of the transmission hollow shaft is in transmission with the synchronous belt through meshing teeth on the cylindrical surface; the lower ends of the synchronous belts are meshed with each other through gear teeth on the fixed gear, and the synchronous belts are provided with tension pulleys; the tensioning wheel is fixedly connected to the first roller through a spring; the fixed gear is fixedly connected to the upper end of the movable support; the transmission hollow shaft is rotationally connected with the fixed sleeve; a group of magnets are uniformly embedded on the cylindrical surface of the fixed sleeve, the number of the magnets on the fixed sleeve is the same as that of the magnets on the sliding block, and one end of the fixed sleeve is connected with the cover plate through a group of springs; when the rolling device works, when the first roller rolls along the upper end face of the rack, the transmission hollow shaft on the first roller rotates around the rotating shaft of the first roller, and the transmission hollow shaft is driven by the synchronous belt to rotate, so that the transmission hollow shaft drives the rotating tool bit at the end part to rotate; chalk one end supports on rotatory tool bit, and the other end of chalk supports on the apron, again because the appeal of magnet on the fixed cover and the sliding block, realizes fixed cover and does not rotate, and then realizes the fixed of chalk through spring and apron, and then realizes that rotatory tool bit cuts the tip of chalk, guarantees that the chalk and then draws more clear accurate cycloid orbit with thinner tip, has further improved the accuracy of demonstration, and then has improved teacher's teaching quality.
Preferably, one side of the cover plate is fixedly connected with one end of the clamping sleeve; the clamping sleeve is sleeved at one end of the chalk, and the conical buckle on the cylindrical surface of the clamping sleeve is contacted with the edge of the inner hole of the fixing sleeve; during operation, one end of the chalk is tightly pressed in the fixed sleeve through the clamping sleeve, on one hand, the chalk cannot rotate relative to the fixed sleeve when the rotary cutter head cuts the chalk, and then the rotary cutter head is guaranteed to effectively cut the chalk, on the other hand, the chalk is guaranteed not to swing when a cycloid locus is drawn, so that the accuracy of the cycloid locus is guaranteed, and the accuracy of demonstration is further improved.
Preferably, an annular air bag is arranged between the conical buckle of the clamping sleeve and the cylindrical surface of the clamping sleeve; during operation, be equipped with annular gasbag between the face of cylinder of the toper buckle of cutting ferrule and cutting ferrule, guaranteed the deflection of the toper buckle on the cutting ferrule on the one hand, and then make things convenient for in the cutting ferrule gets into the hole of fixed cover, on the other hand has guaranteed that the toper buckle on the cutting ferrule still can kick-back after constantly being compressed for a long time, and then has improved the life of cutting ferrule.
The invention has the following beneficial effects:
1. according to the teaching aid, the support plates are arranged below the rack, the suckers are fixedly connected to the support plates, the roller I is rotatably connected to the upper end of the movable support, the two roller II are symmetrically arranged at the lower end of the movable support in the left-right direction, so that a cycloidal track can be drawn on a blackboard, the teaching aid is convenient to move and install, high in flexibility and convenient for teachers to carry during class, students can understand the characteristics of cycloidal tracks by visually observing the formation of the cycloidal tracks, and the teaching quality of the teachers is improved.
2. According to the invention, the first step surface is arranged on the first roller, the second step surface is arranged on the upper end surface of the rack, and the first step surface on the first roller is in contact with the second step surface on the rack, so that the first roller is ensured to roll along a plane, and the phenomenon that the center of the first roller shakes up and down due to the meshing of the first roller and the rack, so that the error of a cycloid track is caused, the deviation of understanding is generated for students, and the teaching quality is influenced is avoided.
3. According to the chalk end cutting device, the group of magnets are uniformly embedded on the inner wall of the cylindrical through hole in the sliding block, the cylindrical through hole of the sliding block is rotationally connected with the transmission hollow shaft, one end of the transmission hollow shaft is fixedly connected with the rotary cutter head, the other end of the transmission hollow shaft is in transmission with the synchronous belt through the meshing teeth on the cylindrical surface, the lower end of the synchronous belt is meshed with the teeth on the fixed gear, the fixed gear is fixedly connected to the upper end of the movable support, the transmission hollow shaft is rotationally connected with the fixed sleeve, the group of magnets are uniformly embedded on the cylindrical surface of the fixed sleeve, the rotary cutter head is further enabled to cut the end of a chalk, the chalk is enabled to draw a clearer and more accurate cycloid track through a thinner end, the accuracy of demonstration.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 1;
FIG. 4 is an enlarged view at C in FIG. 2;
in the figure: the device comprises a first roller 1, a first step surface 11, a rack 2, a limiting block 21, a supporting plate 22, a sucking disc 23, a second step surface 24, a sliding block 25, an extrusion plate 26, a moving bracket 3, a second roller 31, a fixed module 4, a rotary tool bit 41, a transmission hollow shaft 42, a fixed sleeve 43, a magnet 44, a cover plate 45, a synchronous belt 46, a fixed gear 47, a tension wheel 48, a clamping sleeve 51, a conical buckle 511 and an annular air bag 52.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the cycloid demonstration teaching aid for mathematical education comprises a first roller 1, a rack 2 and a limiting block 21, wherein the first roller 1 is meshed with the rack 2 through gear teeth to roll; two ends of the rack 2 are respectively fixedly connected with a limiting block 21; the device also comprises a movable support 3, a second roller 31, a support plate 22, a sucker 23 and a fixing module 4, wherein a group of support plates 22 are arranged below the rack 2; the upper end of the supporting plate 22 is fixedly connected to the lower end surface of the rack 2, and a group of suckers 23 are fixedly connected to the supporting plate 22; the first roller 1 is rotatably connected to the upper end of the movable bracket 3; the lower end of the movable bracket 3 is symmetrically provided with two second rollers 31; the second roller 31 is rotatably connected to the lower end of the movable support 3, and the second roller 31 rolls along the step surface on one side of the rack 2; the first roller 1 is provided with a fixing module 4; the fixing module 4 is used for fixing chalk; the during operation, paste sucking disc 23 in backup pad 22 and press hard on the blackboard, rack 2 is on the blackboard surface through sucking disc 23 fixed connection of below, will remove support 3 and remove 2 one ends of rack, fixed module 4 on rethread gyro wheel 1 fixes the chalk on gyro wheel 1, with the hand promotion removal support 3, gyro wheel 1 rolls along 2 upper end surfaces of rack, the orbit of cycloid is drawn on the blackboard to the chalk on gyro wheel 1 simultaneously, this teaching aid is convenient for remove and the installation, the flexibility is big, make things convenient for the teacher to carry in class, observe through the formation to the cycloid orbit directly perceivedly, more enable the student and understand the characteristic of cycloid, and then improved teacher's teaching quality.
As an embodiment of the invention, a first step surface 11 is arranged on the first roller 1, and the first step surface 11 on the first roller 1 is a cylindrical surface; a second step surface 24 is arranged on the upper end surface of the rack 2, and the second step surface 24 on the rack 2 is a plane; a first step surface 11 on the first roller 1 is in contact with a second step surface 24 on the rack 2; during operation, the first step surface 11 on the first roller 1 rolls along the second step surface 24 on the rack 2, so that the first roller 1 rolls along a plane, the phenomenon that the center of the first roller 1 is shaken up and down due to the meshing of the first roller 1 and the rack 2 is avoided, errors of cycloid tracks are caused, the students are subjected to deviation in understanding, and the teaching quality is influenced.
As an embodiment of the invention, the fixed module 4 is slidably mounted on the first roller 1 through a sliding block 25; the sliding block 25 is slidably mounted in a sliding groove on the first roller 1, one side of the sliding block 25 is provided with a group of V-shaped grooves, the sliding groove on the first roller 1 is radially arranged, and one side of the sliding groove on the first roller 1 is provided with an extrusion plate 26; a group of V-shaped protrusions are arranged on one side of the extrusion plate 26, the V-shaped protrusions on the extrusion plate 26 are attached to the V-shaped grooves on the sliding block 25, and the other side of the extrusion plate 26 is connected with one side of the sliding groove through a spring; during operation can realize adjusting sliding block 25 behind compression stripper plate 26, and then realizes drawing the cycloid of equidimension not on the blackboard, and then can be used for observing the change law between the cycloid of equidimension not, is convenient for further study cycloid's characteristic, and supplementary teacher accomplishes the teaching.
As an embodiment of the present invention, the fixing module 4 includes a rotary cutter head 41, a transmission hollow shaft 42, a fixing sleeve 43, a magnet 44, a cover plate 45, a spring, a synchronous belt 46, a fixing gear 47, and a tension wheel 48, wherein a set of magnets 44 is uniformly embedded on an inner wall of a cylindrical through hole on the sliding block 25, and the transmission hollow shaft 42 is rotatably connected in the cylindrical through hole of the sliding block 25; the transmission hollow shaft 42 is made of a non-magnetic material, one end of the transmission hollow shaft 42 is fixedly connected with the rotary cutter head 41, and the other end of the transmission hollow shaft 42 is in transmission with the synchronous belt 46 through meshing teeth on the cylindrical surface; the lower ends of the synchronous belts 46 are meshed with each other through gear teeth on the fixed gear 47, and the synchronous belts 46 are provided with tension wheels 48; the tensioning wheel 48 is fixedly connected to the first roller 1 through a spring; the fixed gear 47 is fixedly connected to the upper end of the movable bracket 3; the transmission hollow shaft 42 is rotationally connected with a fixed sleeve 43; a group of magnets 44 are uniformly embedded on the cylindrical surface of the fixed sleeve 43, the number of the magnets 44 on the fixed sleeve 43 is the same as that of the magnets 44 on the sliding block 25, and one end of the fixed sleeve 43 is connected with a cover plate 45 through a group of springs; when the rolling machine works, when the first roller 1 rolls along the upper end face of the rack 2, the transmission hollow shaft 42 on the first roller 1 rotates around the rotating shaft of the first roller 1, the transmission hollow shaft 42 is driven by the synchronous belt 46 to rotate, and then the transmission hollow shaft 42 drives the rotary cutter head 41 at the end part to rotate; chalk one end supports on rotary cutter head 41, the other end of chalk supports on apron 45, again because the appeal of magnet 44 on the fixed cover 43 and the magnet 44 on the sliding block 25, realize that fixed cover 43 does not rotate, and then realize the fixed of chalk through spring and apron 45, and then realize rotary cutter head 41 and cut the tip of chalk, guarantee the chalk and then draw more clear accurate cycloid orbit with thinner tip, the accuracy of demonstration has further been improved, and then teacher's teaching quality has been improved.
As an embodiment of the present invention, one side of the cover plate 45 is fixedly connected with one end of a ferrule 51; the clamping sleeve 51 is sleeved at one end of the chalk, and the conical buckle 511 on the cylindrical surface of the clamping sleeve 51 is contacted with the edge of the inner hole of the fixed sleeve 43; during operation, one end of the chalk is pressed in the fixing sleeve 43 through the clamping sleeve 51, on one hand, the chalk is prevented from rotating relative to the fixing sleeve 43 when the rotary cutter head 41 cuts the chalk, and then the rotary cutter head 41 is guaranteed to effectively cut the chalk, on the other hand, the chalk is prevented from swinging when a cycloid locus is drawn, so that the accuracy of the cycloid locus is guaranteed, and the accuracy of demonstration is further improved.
As an embodiment of the present invention, an annular air bag 52 is disposed between the conical buckle 511 of the cutting sleeve 51 and the cylindrical surface of the cutting sleeve 51; during operation, be equipped with annular gasbag 52 between the face of cylinder of the toper buckle 511 of cutting ferrule 51 and cutting ferrule 51, guaranteed the deflection of the toper buckle 511 on the cutting ferrule 51 on the one hand, and then make things convenient for cutting ferrule 51 to get into in the hole of fixed cover 43, on the other hand has guaranteed that the toper buckle 511 on the cutting ferrule 51 still can kick-back after constantly being compressed for a long time, and then has improved cutting ferrule 51's life.
When the teaching aid works, the sucker 23 on the supporting plate 22 is attached to a blackboard and pressed forcibly, the rack 2 is fixedly connected to the surface of the blackboard through the sucker 23 below, the moving support 3 is moved to one end of the rack 2, chalk is fixed on the roller 1 through the fixing module 4 on the roller 1, the moving support 3 is pushed by hand, the roller 1 rolls along the surface of the upper end of the rack 2, and meanwhile, the chalk on the roller 1 draws a cycloid track on the blackboard, so that the teaching aid is convenient to move and install, high in flexibility and convenient for teachers to carry in class, and the formation of the cycloid track is observed visually, so that students can understand the characteristics of cycloid more, and the teaching quality of the teachers is improved; when the first roller 1 rolls along the upper end surface of the rack 2, the transmission hollow shaft 42 on the first roller 1 rotates around the rotating shaft of the first roller 1, and the transmission hollow shaft 42 is driven by the synchronous belt 46 to rotate, so that the transmission hollow shaft 42 drives the rotating tool bit 41 at the end part to rotate; chalk one end supports on rotary cutter head 41, the other end of chalk supports on apron 45, again because the appeal of magnet 44 on the fixed cover 43 and the magnet 44 on the sliding block 25, realize that fixed cover 43 does not rotate, and then realize the fixed to the chalk through cutting ferrule 51 on spring and the apron 45, and then realize rotary cutter head 41 and cut off the tip of chalk, guarantee the chalk and then draw more clear accurate cycloid orbit with thinner tip, the accuracy of demonstration has further been improved, and then teacher's teaching quality has been improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A cycloid demonstration teaching aid for mathematical teaching comprises a first roller (1), a rack (2) and a limiting block (21), wherein the first roller (1) is meshed with the rack (2) through gear teeth to roll; two ends of the rack (2) are respectively fixedly connected with a limiting block (21); the method is characterized in that: the rack is characterized by further comprising a movable support (3), a second roller (31), a support plate (22), a sucker (23) and a fixing module (4), wherein a group of support plates (22) is arranged below the rack (2); the upper end of the supporting plate (22) is fixedly connected to the lower end surface of the rack (2), and the supporting plate (22) is fixedly connected with a group of suckers (23); the first roller (1) is rotatably connected to the upper end of the movable support (3); the lower end of the movable bracket (3) is symmetrically provided with two second rollers (31) at the left and right sides; the second roller (31) is rotatably connected to the lower end of the movable support (3), and the second roller (31) rolls along the step surface on one side of the rack (2); a fixing module (4) is arranged on the first roller (1); the fixing module (4) is used for fixing chalk;
the fixed module (4) is slidably mounted on the first roller (1) through a sliding block (25); the sliding block (25) is slidably mounted in a sliding groove on the first roller (1), one side of the sliding block (25) is provided with a group of V-shaped grooves, the sliding groove on the first roller (1) is arranged along the radial direction, and one side of the sliding groove on the first roller (1) is provided with an extrusion plate (26); one side of the extrusion plate (26) is provided with a group of V-shaped protrusions, the V-shaped protrusions on the extrusion plate (26) are attached to the V-shaped grooves on the sliding block (25), and the other side of the extrusion plate (26) is connected with one side of the sliding groove through a spring;
the fixed module (4) comprises a rotary tool bit (41), a transmission hollow shaft (42), a fixed sleeve (43), magnets (44), a cover plate (45), a spring, a synchronous belt (46), a fixed gear (47) and a tension wheel (48), wherein a group of magnets (44) are uniformly embedded on the inner wall of a cylindrical through hole in the sliding block (25), and the transmission hollow shaft (42) is rotatably connected in the cylindrical through hole in the sliding block (25); the transmission hollow shaft (42) is made of a non-magnetic material, one end of the transmission hollow shaft (42) is fixedly connected with the rotary cutter head (41), and the other end of the transmission hollow shaft (42) is in transmission with the synchronous belt (46) through meshing teeth on the cylindrical surface; the lower ends of the synchronous belts (46) are meshed with each other through gear teeth on the fixed gear (47), and tensioning wheels (48) are arranged on the synchronous belts (46); the tensioning wheel (48) is fixedly connected to the first roller (1) through a spring; the fixed gear (47) is fixedly connected to the upper end of the movable bracket (3); the transmission hollow shaft (42) is rotationally connected with a fixed sleeve (43); a group of magnets (44) are uniformly embedded on the cylindrical surface of the fixed sleeve (43), the number of the magnets (44) on the fixed sleeve (43) is the same as that of the magnets (44) on the sliding block (25), and one end of the fixed sleeve (43) is connected with the cover plate (45) through a group of springs;
one side of the cover plate (45) is fixedly connected with one end of the clamping sleeve (51); the clamping sleeve (51) is sleeved at one end of the chalk, and the conical buckle (511) on the cylindrical surface of the clamping sleeve (51) is contacted with the edge of the inner hole of the fixing sleeve (43);
a first step surface (11) is arranged on the first roller (1), and the first step surface (11) on the first roller (1) is a cylindrical surface; a second step surface (24) is arranged on the upper end surface of the rack (2), and the second step surface (24) on the rack (2) is a plane; a first step surface (11) on the first roller (1) is contacted with a second step surface (24) on the rack (2);
an annular air bag (52) is arranged between the conical buckle (511) of the cutting sleeve (51) and the cylindrical surface of the cutting sleeve (51);
the teaching aid is characterized in that a sucker (23) on a supporting plate (22) is attached to a blackboard and pressed forcibly, a rack (2) is fixedly connected to the surface of the blackboard through the sucker (23) below, a moving support (3) is moved to one end of the rack (2), chalk is fixed on a roller (1) through a fixing module (4) on the roller (1), the moving support (3) is pushed by hands, the roller (1) rolls along the upper end surface of the rack (2), and meanwhile, the chalk on the roller (1) draws a cycloid track on the blackboard, so that the teaching aid is convenient to move and install, high in flexibility and convenient for teachers to carry during class, and students can understand the cycloid characteristics by observing the formation of the cycloid track intuitively, and the teaching quality of the teachers is improved; when the first roller (1) rolls along the upper end face of the rack (2), the transmission hollow shaft (42) on the first roller (1) rotates around the rotating shaft of the first roller (1), and the transmission hollow shaft (42) is driven by the synchronous belt (46) to rotate, so that the transmission hollow shaft (42) drives the rotary cutter head (41) at the end part to rotate; chalk one end supports on rotatory tool bit (41), the other end of chalk supports on apron (45), again because the appeal of magnet (44) on fixed cover (43) and magnet (44) on sliding block (25), realize fixed cover (43) and do not rotate, and then realize the fixed to the chalk through cutting ferrule (51) on spring and apron (45), and then realize that rotatory tool bit (41) cut off the tip of chalk, guarantee the chalk and then draw more clear accurate cycloid orbit with thinner tip, the accuracy of demonstration has further been improved, and then teacher's teaching quality has been improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811024722.5A CN109064839B (en) | 2018-09-04 | 2018-09-04 | Cycloid demonstration teaching aid for mathematical education |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811024722.5A CN109064839B (en) | 2018-09-04 | 2018-09-04 | Cycloid demonstration teaching aid for mathematical education |
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| CN109064839A CN109064839A (en) | 2018-12-21 |
| CN109064839B true CN109064839B (en) | 2020-07-10 |
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| CN111270916B (en) * | 2020-01-19 | 2021-03-30 | 温州百亚机械科技有限公司 | Magnetic lock and matched key combined device and use method thereof |
| CN113978165A (en) * | 2021-11-02 | 2022-01-28 | 福州外语外贸学院 | Cycloid demonstration teaching aid that college mathematics teaching used |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203511073U (en) * | 2013-10-10 | 2014-04-02 | 屈晨曦 | Pencil-lead-pared type compasses |
| CN205068911U (en) * | 2015-10-23 | 2016-03-02 | 齐齐哈尔大学 | Cycloid teaching aid that college mathematics teaching used |
| CN205984018U (en) * | 2016-06-04 | 2017-02-22 | 陕西学前师范学院 | Teaching aid is demonstrated to cycloid for advanced math teaching |
| CN106991875A (en) * | 2017-06-27 | 2017-07-28 | 南阳理工学院 | A kind of Higher Mathematics Teaching cycloid demonstration teaching aid |
| CN206953852U (en) * | 2017-04-13 | 2018-02-02 | 郑清勇 | A kind of epicycloid demonstrator |
-
2018
- 2018-09-04 CN CN201811024722.5A patent/CN109064839B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203511073U (en) * | 2013-10-10 | 2014-04-02 | 屈晨曦 | Pencil-lead-pared type compasses |
| CN205068911U (en) * | 2015-10-23 | 2016-03-02 | 齐齐哈尔大学 | Cycloid teaching aid that college mathematics teaching used |
| CN205984018U (en) * | 2016-06-04 | 2017-02-22 | 陕西学前师范学院 | Teaching aid is demonstrated to cycloid for advanced math teaching |
| CN206953852U (en) * | 2017-04-13 | 2018-02-02 | 郑清勇 | A kind of epicycloid demonstrator |
| CN106991875A (en) * | 2017-06-27 | 2017-07-28 | 南阳理工学院 | A kind of Higher Mathematics Teaching cycloid demonstration teaching aid |
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