CN215495586U

CN215495586U - Hypocycloid demonstrator

Info

Publication number: CN215495586U
Application number: CN202122247716.XU
Authority: CN
Inventors: 马建恒; 马伊
Original assignee: Ma Jianheng
Current assignee: Ma Jianheng
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-01-11
Anticipated expiration: 2031-09-16

Abstract

The utility model discloses a hypocycloid demonstrator, and belongs to the technical field of popular science teaching equipment. Including gear circle (6), disc (4), planetary gear, orbit marker pen (9) and orbit display paper (10), orbit display paper (10) set up in planetary gear's top, and setting can be dismantled in planetary gear meshing department in orbit marker pen (9), orbit marker pen (9) are the laser pen, and orbit display paper (10) are fluorescent paper for the orbit of orbit marker pen (9) can show on orbit display paper (10). This device can dismantle setting on planetary gear through with orbit marker pen (8), and the orbit route that actual drive disc just can be with planetary gear and ring gear (6) internal gearing shows at orbit display paper (9), can see continuous orbit effect when rotating in succession simultaneously. The problem of prior art can not show the situation of hypocycloid change multiterminal directly perceived, the sight is relatively poor is solved.

Description

Hypocycloid demonstrator

Technical Field

The utility model discloses a hypocycloid demonstrator, and belongs to the technical field of popular science teaching equipment.

Background

Some hypocycloids exist in science and technology museums, such as "rolling out straight line", that is, when a small circle is inscribed in a large circle and rolls along the large circle, the locus of any point on the circumference of the moving circle is called hypocycloid, if the diameter of the small circle is exactly equal to half of the diameter of the large circle, the locus of any point on the edge of the small circle is a straight line and passes through the circle of the large circle, and therefore the condition that the hypocycloid becomes a straight line is that the diameter of the small circle is half of the radius of the large circle. The demonstration is too monotonous to attract the attention of visitors, and the 'rolling out of straight line' exhibit cannot visually show the situation of multiple ends of hypocycloid change. Especially the wonderful regular combination of trajectories formed by hypocycloid continuous trajectories is regrettably effective. In addition, the demonstrator rotated by hands is not practical to demonstrate in a science and technology museum, is easy to lose and is not easy to demonstrate the superposition effect of hypocycloids.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that the prior art can not visually display the situation of multiple ends of hypocycloid change and has poor appreciation.

The technical scheme adopted by the utility model for solving the technical problems is as follows: hypocycloid demonstrator, including gear rim, disc and planetary gear, still include orbit marker pen and orbit display paper, planetary gear is one at least and rotates the setting on the disc to with the gear rim meshing, the orbit display paper sets up in planetary gear's top, and the setting can be dismantled in the planet gear meshing department to the orbit marker pen, the orbit marker pen is the laser pen, and the orbit display paper is fluorescent paper for the orbit marker pen's orbit can show on the orbit display paper.

The device is characterized in that a metal fixing block is arranged on the end face of the planetary gear, a magnet block is arranged at the end of the track marking pen, and the track marking pen is connected with the planetary gear in a magnetic manner.

The track display paper in the device is arranged above the planetary gear in parallel, and the outer side of the track display paper is wrapped by glass or transparent plastic.

The device comprises a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear, a seventh gear, a sixth gear, a seventh gear, a sixth gear, a seventh gear, a sixth gear, a fourth gear, a sixth gear, a fourth gear, a sixth gear, a fourth gear, a sixth gear, a fourth gear, a sixth, a fourth gear, a sixth, a sixth, a sixth, a sixth, a.

Furthermore, in the device, the first planet gear and the third planet gear are arranged close to the disc at intervals and are coplanar, and the second planet gear is positioned above the first planet gear or the third planet gear.

The device further comprises a rotating wheel, a belt and a support, wherein the rotating wheel and the disc are arranged on one end face of the support at intervals and are rotatably connected with the support, the rotating wheel and the disc are connected through the belt, the gear ring is located above the disc, and a rotating shaft of the disc is located at the circle center of the gear ring.

The utility model has the beneficial effects that: the device has simple structure, simple and convenient operation and low manufacturing cost. This device is through can dismantling the setting on planetary gear with the orbit marker pen, and the orbit marker pen is the laser pen, and the orbit display paper is fluorescent paper for the orbit marker pen direct irradiation is on the orbit display paper, and actual drive disc just can show the orbit route of orbit marker pen at the orbit display paper, can see continuous orbit effect during continuous rotation. Meanwhile, the device shows the effect generated when the hypocycloids move rapidly and the superposition effect of the plurality of the hypocycloids, and stimulates visitors to pay attention to and explore the mathematical charm.

Drawings

FIG. 1 is a schematic cross-sectional front view of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1 according to the present invention.

Labeled as: 1 is a bracket, 2 is a rotating wheel, 3 is a belt, 4 is a disk, 5 is a planetary gear III, 6 is a gear ring, 7 is a planetary gear I, 8 is a planetary gear II, 9 is a track marking pen, and 10 is track display paper.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the hypocycloid demonstrator of the present invention comprises a gear ring 6, a disk 4, a planetary gear, at least one planetary gear 9 and a trace display paper 10, wherein the planetary gear is rotatably disposed on the disk 4 and is engaged with the gear ring 6, the trace display paper 10 is disposed above the planetary gear, the trace marker 9 is detachably disposed at the engagement position of the planetary gear, the trace marker 9 is a laser pen, and the trace display paper 10 is a fluorescent paper, such that the trace of the trace marker 9 can be displayed on the trace display paper 10. Those skilled in the art can understand that, this device can dismantle the setting on planetary gear through with trajectory marker pen 9, and trajectory display paper 10 sets up in planetary gear's top, and preferred trajectory marker pen 9 is the laser pen, and trajectory display paper 10 is fluorescent paper, because planetary gear and ring gear 6 inscribe, and rotate with disc 4 and be connected for the hypocycloid motion just can be realized to planetary gear to actual drive disc 4, and the while is audio-visually shows hypocycloid structure at trajectory display paper 10 through trajectory marker pen 9. Continuous track effect can be seen when rotating continuously. In practice, hypocycloids of planet gears with different diameters can be displayed simultaneously according to the number of the planet gears, and because each planet gear is provided with the track marking pen 9, the color of the track marking pen 9 can be changed actually, so that hypocycloid tracks of the planet gears with different diameters can be observed simultaneously. Because the diameter of the gear ring 6 is fixed, the number and the diameter of the planet gears need to be considered according to actual needs, and the arrangement position of each planet gear is fully considered, the situation that the track of the track marking pen 9 cannot be completely displayed on the track display paper 10 due to mutual interference in operation is avoided, and a sequential overlapping mode can be adopted; the multi-layer arrangement can also be adopted, and at least one planetary gear is arranged on one layer; the structures all need to ensure that the planetary gear is internally meshed with the inner gear ring; meanwhile, in order to avoid light shielding, it is preferable that the planetary gear located above is made of a transparent material, and the track display paper 10 is prevented from influencing the track display of the lower track marking pen 9.

Preferably, in the above device, a metal fixing block is disposed on an end face of the planetary gear, a magnet block is disposed at an end of the trajectory marking pen 9, and the trajectory marking pen 9 is magnetically connected to the planetary gear. It will be appreciated by those skilled in the art that the present apparatus preferably removably connects the track marking pen 9 to the planet gears in order to facilitate changing the position of the track marking pen 9 on the planet gears. Specifically, a metal fixing block is arranged on the end face of the planetary gear, and a magnet block is arranged at the end of the track marking pen 9, so that the track marking pen 9 is magnetically connected with the planetary gear.

Preferably, the track display paper 10 is disposed in parallel above the disc 4 and is wrapped by glass or transparent plastic. As will be understood by those skilled in the art, in order to ensure that the track of the track marking pen 9 is completely displayed on the track display paper 10, the track display paper 10 is preferably arranged above the planetary gear in parallel, and is fixed by a support. Meanwhile, the fluorescent paper is wrapped by glass or transparent plastic, so that toxic substances are prevented from affecting audiences.

Preferably, in the device, the number of the planet gears in the device is three, the planet gears are a first planet gear 7, a second planet gear 8 and a third planet gear 5, the first planet gear 7, the second planet gear 8 and the third planet gear 5 are all made of transparent materials, the diameter of the first planet gear 7 is smaller than the radius of the gear ring 6, the diameter of the second planet gear 8 is equal to the radius of the gear ring 6, and the diameter of the third planet gear 5 is larger than the radius of the gear ring 6. As can be understood by those skilled in the art, the device preferably has three planet gears, namely a planet gear I7, a planet gear II 8 and a planet gear III 5, and further defines that the diameter of the planet gear I7 is smaller than the radius of the gear ring 6, the diameter of the planet gear II 8 is equal to the radius of the gear ring 6, and the diameter of the planet gear III 5 is larger than the radius of the gear ring 6. Because the arrangement sequence of the first planet gear 7, the second planet gear 8 and the third planet gear 5 is uncertain, in order to prevent the occurrence of the shielding track marker pen 9, the first planet gear 7, the second planet gear 8 and the third planet gear 5 are preferably made of transparent materials, the planet gears above the first planet gear 7, the second planet gear 8 and the third planet gear 5 can be actually selected to be made of transparent materials according to the arrangement, and the materials with better light transmission can also be actually selected.

Preferably, in the above device, the first planet gear 7 and the third planet gear 5 are spaced close to the disc 4 and are coplanar, and the second planet gear 8 is located above the first planet gear 7 or the third planet gear 5. It can be understood by those skilled in the art that the arrangement structure of the first planet gear 7, the second planet gear 8 and the third planet gear 5 is preferred in the device, specifically, the first planet gear 7 and the third planet gear 5 are arranged at intervals close to the disk 4 and are coplanar, namely, the first planet gear 7, the second planet gear 8 and the third planet gear 5 are arranged in two layers, the first planet gear 7 and the third planet gear 5 are arranged in the same layer and are positioned at the bottom layer, and the second planet gear 8 is positioned above the first planet gear 7 or the third planet gear 5. Due to the fact that the diameters of the first planet gear 7 and the third planet gear 5 are limited, the end portion of the rotating shaft of the second planet gear 8 is located between the gap between the first planet gear 7 and the third planet gear 5, and the first planet gear 7, the second planet gear 8 and the third planet gear 5 do not interfere with each other in operation.

Preferably, the device further comprises a rotating wheel 2, a belt 3 and a support 1, wherein the rotating wheel 2 and the disc 4 are arranged on one end face of the support 1 at intervals and are rotatably connected with the support 1, the rotating wheel 2 and the disc 4 are connected through the belt 3, the gear ring 6 is located above the disc 4, and a rotating shaft of the disc 4 is located at the circle center of the gear ring 6. It will be appreciated by those skilled in the art that the device is preferably practical to arrange the rotating wheel 2 and the disc 4 at an interval on one end face of the support 1, and rotatably connect with the support 1, the rotating wheel 2 and the bottom plate 4 are connected by the belt 3, so that the rotating wheel 2 and the bottom plate 4 form a belt mechanism, and the bottom plate 4 can be driven by rotating the hand wheel 2. And gear circle 6 is located the top of disc 4, and the pivot of disc 4 is located the centre of a circle department of gear circle 6, and planetary gear rotates and sets up on disc 4, and is located inside gear circle 6 to with gear circle 6 internal gearing, form hypocycloid mechanism.

Claims

1. Hypocycloid demonstrator, including gear circle (6), disc (4) and planetary gear, its characterized in that: still include orbit marker pen (9) and orbit display paper (10), planetary gear is one at least and rotates the setting on disc (4) to with gear ring (6) meshing, orbit display paper (10) set up in planetary gear's top, and setting can be dismantled in planetary gear meshing department in orbit marker pen (9), orbit marker pen (9) are the laser pen, and orbit display paper (10) are fluorescent paper for the orbit of orbit marker pen (9) can show on orbit display paper (10).

2. The hypocycloid demonstrator according to claim 1, wherein: the end face of the planetary gear is provided with a metal fixing block, the end part of the track marking pen (9) is provided with a magnet block, and the track marking pen (9) is connected with the planetary gear in a magnetic manner.

3. The hypocycloid demonstrator according to claim 1, wherein: the track display paper (10) is arranged above the planetary gear in parallel, and the outer side of the track display paper (10) is wrapped by glass or transparent plastic.

4. The hypocycloidal demonstrator according to any one of claims 1 to 3 wherein: the number of the planet gears is three, the planet gears I (7), the planet gears II (8) and the planet gears III (5) are respectively made of transparent materials, the diameter of the planet gear I (7) is smaller than that of the gear ring (6), the diameter of the planet gear II (8) is equal to that of the gear ring (6), and the diameter of the planet gear III (5) is larger than that of the gear ring (6).

5. The hypocycloidal demonstrator according to claim 4, wherein: the first planet gear (7) and the third planet gear (5) are arranged close to the disc (4) at intervals and are coplanar, and the second planet gear (8) is positioned above the first planet gear (7) or the third planet gear (5).

6. The hypocycloid demonstrator according to claim 1, wherein: still include runner (2), belt (3) and support (1), runner (2) and disc (4) interval set up on support (1) terminal surface to rotate with support (1) and be connected, runner (2) and disc (4) are connected through belt (3), and gear circle (6) are located the top of disc (4), and the pivot of disc (4) is located the centre of a circle department of gear circle (6).