CN219512755U - Demonstration instrument for three stars of sun, earth, moon - Google Patents
Demonstration instrument for three stars of sun, earth, moon Download PDFInfo
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- CN219512755U CN219512755U CN202320712905.6U CN202320712905U CN219512755U CN 219512755 U CN219512755 U CN 219512755U CN 202320712905 U CN202320712905 U CN 202320712905U CN 219512755 U CN219512755 U CN 219512755U
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Abstract
The utility model relates to the technical field of demonstration instruments, and provides a three-star demonstration instrument for the sun, the earth and the moon, which comprises a rack, wherein the rack is provided with a first elliptical guide rail and a second elliptical guide rail, the first elliptical guide rail and the second elliptical guide rail are longitudinally provided with intervals and are transversely arranged in a staggered mode, a guide rod is rotatably arranged on a circular mandrel of the first elliptical guide rail, a telescopic rod is rotatably arranged on a circular mandrel of the second elliptical guide rail, the guide rod and the telescopic rod are arranged in a crossed mode and synchronously rotate in the same direction, a base is in clearance fit with the guide rod, the guide rod rotates to drive the base to move on the first elliptical guide rail, and a ground shaft is rotatably arranged on the base and is hinged with a telescopic rod ball. Through the technical scheme, the problem that the earth in the prior art cannot stably move along an elliptical orbit and the earth axis cannot always point to the polar star is solved.
Description
Technical Field
The utility model relates to the field of teaching aids and science popularization demonstration and related astronomical venue construction schemes, in particular to a daily, earth, moon and three-star demonstration instrument.
Background
The demonstrator is indispensable as a conventional test instrument for geography teaching. The running orbit of the earth in the existing earth motion demonstrator is basically in a right circular shape, and the actual orbit of the earth is in an oval shape, so that the situation that the design structure is not in accordance with the actual situation is generated, some important geographic phenomena such as a far day point, a near day point and the like cannot be demonstrated through the instrument, besides, the earth axis cannot always point to the North Pole star, and a teacher needs to additionally explain students in the teaching process.
Disclosure of Invention
The utility model provides a three-star demonstration instrument for the sun, the earth and the moon, and solves the problem that the demonstration instrument in the related technology simulates the earth unrealistically.
The technical scheme of the utility model is as follows:
the device for demonstrating the three stars of the sun, the earth and the moon comprises
The machine frame is provided with a first elliptic guide rail and a second elliptic guide rail, the first elliptic guide rail and the second elliptic guide rail are longitudinally provided with intervals and are transversely staggered,
the guide rod is rotatably arranged on the circular mandrel of the first elliptical guide rail,
the telescopic rod is rotationally arranged on the circular mandrel of the second elliptical guide rail, the guide rod and the telescopic rod are crosswise arranged and synchronously rotate in the same direction,
the base is in clearance fit with the guide rod, the guide rod rotates to drive the base to move on the first elliptical guide rail,
the ground shaft is rotationally arranged on the base and hinged with the telescopic rod ball, the guide rod and the telescopic rod rotate to drive the ground shaft to move along the first elliptical guide rail and the second elliptical guide rail,
the earth piece is arranged at one end of the earth shaft,
the sun piece is arranged on the frame, the earth piece is positioned at one side of the sun piece,
and the moon piece is arranged on the telescopic rod.
As a further technical proposal, also comprises
The housing, the frame sets up the casing bottom, the casing top with form oval guide slot between the second oval guide rail, the earth's axle runs through oval guide slot.
As a further technical proposal, the base is provided with a limiting shaft and also comprises
The limiting ring is arranged on the telescopic end of the telescopic rod, the limiting ring penetrates through the elliptical guide groove, the ground shaft is in ball hinge joint with the limiting ring, and the ground shaft penetrates through the limiting ring,
the connecting cylinder, the guide arm runs through the connecting cylinder, just the guide arm with connecting cylinder clearance fit, the connecting cylinder has connecting portion, spacing axle runs through connecting portion.
As a further technical scheme, the guide rod is provided with a rod part and further comprises
The telescopic rod is characterized in that the first gear piece is rotatably arranged on the first elliptical guide rail circular mandrel, one end of the first gear piece is meshed with teeth on the guide rod, the other end of the first gear piece is meshed with teeth on the telescopic rod, the bottom surface of the first gear piece is higher than the top surface of the rod portion, the rod portion penetrates through the connecting cylinder, the rod portion is in clearance fit with the connecting cylinder, the telescopic rod is in butt joint with the first elliptical guide rail circular mandrel, and the number of teeth on the guide rod, the number of teeth of the first gear piece and the number of teeth on the telescopic rod are identical.
As a further technical scheme, the first elliptical guide rail circular mandrel is provided with an abutting portion and a supporting ring, the supporting ring is located on one side of the abutting portion, the telescopic rod abuts against the abutting portion, and the first gear piece is rotatably arranged on the supporting ring.
As a further technical proposal, also comprises
The sleeve part is rotatably arranged at the telescopic end of the telescopic rod, penetrates through the limiting ring, the ground shaft is in ball hinge joint with the sleeve part through a universal piece, after the telescopic rod stretches, the sleeve part is close to or far away from the second elliptical guide rail round mandrel, the moon part is detachably arranged on the sleeve part and positioned at one side of the earth part,
the second gear piece is rotatably arranged on the telescopic rod, is positioned on one side of the sleeve piece and is meshed with teeth on the sleeve piece.
As a further technical scheme, the base comprises
The sliding block is arranged on the first elliptical guide rail in a sliding way, a space is arranged between the sliding block and the first elliptical guide rail,
the ground shaft support is provided with the limiting shaft, the ground shaft support penetrates through the interval, and the ground shaft is rotatably arranged on the ground shaft support.
As a further technical scheme, the first elliptical guide rail circular mandrel, the second elliptical guide rail circular mandrel and the first gear piece are eccentrically arranged in the rotating axial direction.
The working principle and the beneficial effects of the utility model are as follows:
according to the utility model, the first elliptical guide rail and the second elliptical guide rail which are eccentrically arranged are used, one end of the earth shaft slides on the first elliptical guide rail, the other end of the earth shaft follows the edge of the second elliptical guide rail, so that the moving track of the earth can be elliptical, more real conditions such as a far day point, a near day point and the like can be demonstrated for students, the frame is provided with a sun piece, one end of the earth shaft is provided with the earth piece, the earth shaft rotates on one side of the sun piece, meanwhile, the elliptical track moves, the earth rotates and the demonstration of the earth revolving around the sun is completed, the second elliptical guide rail is positioned above the first elliptical guide rail, and the first elliptical guide rail is arranged at the bottom of the frame, so that parts which are connected and driven can be arranged in the shell to play a role in protection;
in the existing demonstration instrument, as the circular guide rail is usually adopted, the swing amplitude of the earth shaft in the revolution process is larger, the earth shaft cannot stably point to the polar star, in order to solve the problems, the fixed included angle between the earth shaft and the plane of the revolution orbit is 66.5 degrees, the earth shaft and the equatorial plane are 90 degrees, the intersection angle between the revolution orbit and the equatorial plane is 23.5 degrees, the first elliptical guide rail and the second elliptical guide rail which are eccentrically arranged are required, and the orientation of the earth shaft is always fixed, so that the guide rod rotationally arranged on the circular mandrel of the first elliptical guide rail and the telescopic rod rotationally arranged on the circular mandrel of the second elliptical guide rail can adapt to various positions, the clamping is prevented, the base is in clearance fit with the guide rod, the tight fit between the base and the guide rod is prevented under the driving of the guide rod, the clamping condition is generated, the earth shaft with one end provided with an earth piece is rotationally arranged on the base and is hinged with the telescopic rod ball, the guide rod and the guide rod rotationally drives the earth shaft to move along the first elliptical guide rail and the second elliptical guide rail, and the guide rod and the telescopic rod are alternately arranged and synchronously rotated in the same direction, so that the earth shaft is fixedly oriented compared with the existing demonstration instrument, and the polar star can stably point to the polar star in the operation process;
the sun of the instrument is positioned on the upper panel and one focus of the elliptical orbit, so that the change of the sun at the near-day point and the far-day point in the revolution process of the earth can be intuitively seen. The outer cover is made of spherical acrylic materials commonly used for energy-saving bulbs. A red LED light source is arranged in the lamp. The sun characteristic can be represented visually. Four small holes are arranged at the same height of the periphery of the solar spherical cover and the center of the earth. Four red line-type laser light sources are arranged in the lamp. The four laser light sources form a continuous linear light belt, and the continuous linear light belt irradiates the periphery of the sun horizontally to represent the direct irradiation position of the sun. In the revolution process of the earth, the direct point of the sun irradiated on the earth can be intuitively seen to change back and forth between the return lines of the north and the south along with the revolution of the earth. Thereby being easier to understand the four seasons;
the component members can be added with some geographical elements such as twelve constellation marks, twenty-four solar terms marks, december marks, spring, summer, autumn and winter marks and the like. The functions of the visual expression are as follows: the orbit of revolution around the earth is elliptical, the sun is at one focus of the ellipse, and the north of the earth axis always points to the polar star; the revolution period of the moon around the earth is equal to the rotation period, namely the moon keeps unchanged towards the ground; a twelve constellation diagram composed of LED lamp beads can be correspondingly lightened along with the change of the revolution position of the earth; the method is convenient for understanding different months and seeing the reasons of different constellations; geographic elements of twenty-four solar terms are marked on the revolution orbit of the earth. The earth revolution positions corresponding to the solar terms such as spring, autumn, winter, summer and the like can be really observed; twelve months and four seasons are marked on the revolution orbit of the earth, so that the relationship between the four seasons of the month and the revolution position of the earth can be intuitively corresponding; the linear light is used for intuitively reflecting the position of the direct point of the sun on the earth, so that the four seasons can be better understood;
working principle: the guide rod drives the base to slide on the elliptical guide rail, the connecting cylinder slides in a clearance manner on the guide rod, meanwhile, the angle between the connecting cylinder and the base changes, at the moment, the earth shaft rotates to realize earth rotation, the earth shaft slides on the first elliptical guide rail, the sun piece is arranged on the frame to realize earth revolution around the sun, the spherical hinge improves the angular flexibility of the earth shaft on each running position of the second elliptical guide rail through the telescopic rod, and meanwhile, the orientation of the earth shaft is fixed and always points to the polar star.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a three-star demonstration instrument for the sun, the earth and the moon in the utility model;
FIG. 2 is a schematic diagram of the internal structure of a three-star demonstration instrument for the sun, the earth and the moon in the utility model;
FIG. 3 is a schematic diagram of the internal structure of the three-star demonstration instrument of the present utility model;
FIG. 4 is an enlarged view of portion A of FIG. 2 in accordance with the present utility model;
FIG. 5 is a schematic view of a base structure according to the present utility model;
FIG. 6 is an enlarged view of portion B of FIG. 2 in accordance with the present utility model;
FIG. 7 is an enlarged view of portion C of FIG. 3 in accordance with the present utility model;
FIG. 8 is an enlarged view of the portion D of FIG. 3 in accordance with the present utility model;
FIG. 9 is a schematic diagram of the operation of the three-star presentation instrument of the present utility model;
in the figure: 1. the device comprises a first elliptic guide rail, 2, a second elliptic guide rail, 3, a guide rod, 4, a telescopic rod, 5, a base, 6, a ground shaft, 7, a earth piece, 8, a sun piece, 9, a shell, 10, an elliptic guide groove, 11, a limiting shaft, 12, a limiting ring, 13, a connecting cylinder, 14, a rod part, 15, a first gear piece, 16, an abutting part, 17, a supporting ring, 18, a sleeve piece, 19, a moon piece, 20, a second gear piece, 21, a sliding block, 22, a spacing, 23, a ground shaft bracket, 24 and a connecting part.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 9, the present embodiment proposes
The device for demonstrating the three stars of the sun, the earth and the moon comprises
The machine frame is provided with a first elliptical guide rail 1 and a second elliptical guide rail 2, the first elliptical guide rail 1 and the second elliptical guide rail 2 are longitudinally provided with intervals and are transversely arranged in a staggered mode,
the guide rod 3 is rotatably arranged on the circular mandrel of the first elliptical guide rail 1,
the telescopic rod 4 is rotatably arranged on the circular mandrel of the second elliptical guide rail 2, the guide rod 3 and the telescopic rod 4 are arranged in a crossed manner and synchronously rotate in the same direction,
a base 5 which is in clearance fit with the guide rod 3, the guide rod 3 rotates to drive the base 5 to move on the first elliptical guide rail 1,
the ground shaft 6 is rotatably arranged on the base 5 and is in ball joint with the telescopic rod 4, the guide rod 3 and the telescopic rod 4 rotate to drive the ground shaft 6 to move along the first elliptical guide rail 1 and the second elliptical guide rail 2,
a terrestrial member 7 provided at one end of the earth shaft 6,
a sun member 8 provided on the frame, the earth member 7 being located on one side of the sun member 8,
moon 19 is provided on the telescopic rod 4.
In the embodiment, a first elliptical guide rail 1 and a second elliptical guide rail 2 which are eccentrically arranged are used, one end of a ground shaft 6 slides on the first elliptical guide rail 1, the other end of the ground shaft follows the edge of the second elliptical guide rail 2, so that the running track of the earth is elliptical, more realistic conditions such as a far day point, a near day point and the like can be demonstrated for students, a solar member 8 is arranged on a frame, an earth member 7 is arranged at one end of the ground shaft 6, the earth member 7 is positioned at one side of the solar member 8, the ground shaft 6 rotates while running on the elliptical track, the earth rotation and the demonstration of the earth revolution around the sun are completed, the second elliptical guide rail 2 is positioned above the first elliptical guide rail 1, the first elliptical guide rail 1 is arranged at the bottom of the frame, and parts which are driven by connection can be arranged in a shell 9 to play a role of protection;
in the prior demonstration instrument, the swing amplitude of the earth shaft 6 in the revolution process is large and cannot stably point to the polar star, in order to solve the problems, the fixed included angle between the earth shaft 6 and the plane of the revolution orbit is 66.5 degrees, the earth shaft 6 and the equatorial plane are 90 degrees, the intersection angle between the revolution orbit and the equatorial plane is 23.5 degrees, the first elliptical guide rail 1 and the second elliptical guide rail 2 which are eccentrically arranged are needed, the orientation of the earth shaft 6 is always designed to be fixed, so a guide rod 3 which is rotatably arranged on the circular mandrel of the first elliptical guide rail 1 and a telescopic rod 4 which is rotatably arranged on the circular mandrel of the second elliptical guide rail 2 are used, the device can adapt to various positions to prevent clamping, the base 5 is in clearance fit with the guide rod 3, the base 5 is prevented from being tightly matched with the guide rod 3 under the action of the guide rod 3, clamping occurs, the ground shaft 6 with the earth piece 7 at one end is rotatably arranged on the base 5 and is in ball joint with the telescopic rod 4, the guide rod 3 and the telescopic rod 4 rotate to drive the ground shaft 6 to move along the first elliptical guide rail 1 and the second elliptical guide rail 2, the guide rod 3 and the telescopic rod 4 are crosswise arranged and synchronously rotate in the same direction, the purpose that the ground shaft 6 is fixedly oriented is achieved, and compared with the ground shaft 6 of the existing demonstration instrument, the device can be more stably pointed at the arctic satellite in the operation process;
working principle: the guide rod 3 drives the base 5 to slide on the first elliptical guide rail 1, the connecting cylinder 13 slides in a clearance on the guide rod 3, meanwhile, the angle between the connecting cylinder 13 and the base 5 changes, at the moment, the earth shaft 6 rotates to realize earth rotation, the earth shaft 6 slides on the first elliptical guide rail 1, the sun piece 8 is arranged on the frame to realize earth revolution around the sun, the spherical hinge improves the angle flexibility of the earth shaft 6 on each running position of the second elliptical guide rail 2 through the telescopic rod 4, and meanwhile, the orientation of the earth shaft 6 is fixed and always points to the arctic satellite.
Further, also include
The casing 9, the frame sets up the casing 9 bottom, casing 9 top with form oval guide slot 10 between the second oval guide rail 2, the earth's axle 6 runs through oval guide slot 10.
In this embodiment, in order to improve the operation stability of the whole demonstration device and improve the overall protection effect, the rack is arranged at the bottom of the casing 9, an elliptical guide groove 10 is formed between the top of the casing 9 and the second elliptical guide rail 2, the ground shaft 6 penetrates through the elliptical guide groove 10, the elliptical guide groove 10 can further limit the movement of the ground shaft 6, and meanwhile, the casing 9 also protects other parts.
Further, the base 5 has a limiting shaft 11, and further includes
A limiting ring 12 arranged on the telescopic end of the telescopic rod 4, wherein the limiting ring 12 penetrates through the elliptical guide groove 10, the ground shaft 6 is in ball hinge joint with the limiting ring 12, and the ground shaft 6 penetrates through the limiting ring 12,
the connecting cylinder 13, the guide rod 3 runs through the connecting cylinder 13, and the guide rod 3 is in clearance fit with the connecting cylinder 13, the connecting cylinder 13 is provided with a connecting part 24, and the limiting shaft 11 runs through the connecting part 24.
In the embodiment, the limiting ring 12 is arranged at the telescopic end of the telescopic rod 4 and penetrates through the elliptical guide groove 10, the ground shaft 6 slides on the elliptical guide rail through the base 5, the ground shaft 6 is rotatably arranged on the base 5 and is in spherical hinge connection with the limiting ring 12 and penetrates through the limiting ring 12, the telescopic rod 4 and the guide rod 3 are arranged in a crossed mode, the rotating speeds of the telescopic rod 4 and the guide rod 3 are the same, one end of the ground shaft 6 can be limited by the guide rod 3 through the base 5, the whole is limited by the limiting ring 12, the purpose of fixing the orientation of the ground shaft 6 is achieved, and compared with the ground shaft 6 of the conventional demonstrator, the running process can be more stably oriented to the polar star;
the guide arm 3 runs through the connecting cylinder 13, and guide arm 3 and connecting cylinder 13 clearance fit prevent that guide arm 3 from driving when base 5 removes, take place conditions such as screens, and connecting cylinder 13 has connecting portion 24, and the spacing axle 11 of base 5 runs through connecting portion 24, is in order to improve the flexibility that earth's axle 6 removed, and earth's axle 6 can take place certain angle variation at the removal in-process, and connecting portion 24 and spacing axle 11 run through the setting, the condition of adaptation angle variation that just can be fine improves overall operation stability.
Further, the guide rod 3 has a rod portion 14, and further includes
The first gear piece 15 rotates and is arranged on the circular mandrel of the first elliptical guide rail 1, one end of the first gear piece 15 is meshed with teeth on the guide rod 3, the other end of the first gear piece 15 is meshed with teeth on the telescopic rod 4, the bottom surface of the first gear piece 15 is higher than the top surface of the rod portion 14, the rod portion 14 penetrates through the connecting cylinder 13, the rod portion 14 is in clearance fit with the connecting cylinder 13, the telescopic rod 4 is abutted to the circular mandrel of the first elliptical guide rail 1, and the number of teeth on the guide rod 3, the number of teeth of the first gear piece 15 and the number of teeth on the telescopic rod 4 are identical.
In this embodiment, in order to realize that the telescopic rod 4 and the guide rod 3 are alternately arranged and synchronously rotate in the same direction, the guide rod 3 is designed to have a rod portion 14, the rod portion 14 penetrates through the connecting cylinder 13, a first gear member 15 is further added, the first gear member 15 is rotationally arranged on the circular spindle of the first elliptical guide rail 1, one end of the first gear member 15 is meshed with teeth on the guide rod 3, the other end of the first gear member is meshed with teeth on the telescopic rod 4, the bottom surface of the first gear member 15 is higher than the top surface of the rod portion 14, the position where the rod portion 14 rotates is avoided, interference between the rod portion 14 and the first gear member 15 during operation is prevented, the number of teeth on the guide rod 3, the number of teeth on the first gear member 15 and the number of teeth on the telescopic rod 4 are the same, the three are the same, the purposes that the guide rod 3 rotates to drive the first gear and the telescopic rod 4 to simultaneously rotate, and the rotation speed of the guide rod 3 and the telescopic rod 4 are the same are guaranteed, and the orientation of the ground shaft 6 is fixed are further guaranteed.
Further, the center axis of the first elliptical guide rail 1 has an abutting portion 16 and a supporting ring 17, the supporting ring 17 is located at one side of the abutting portion 16, the telescopic rod 4 abuts against the abutting portion 16, and the first gear member 15 is rotatably disposed on the supporting ring 17.
In this embodiment, in order to make the operation of the first gear member 15 more stable, the second elliptical guide rail 2 is supported, and meanwhile, the cost is reduced, the center axis of the first elliptical guide rail 1 is designed to have an abutting portion 16 and a supporting ring 17, the telescopic rod 4 abuts against the abutting portion 16 to provide a stable supporting effect, meanwhile, the rotation of the telescopic rod 4 thereon is not affected, the first gear member 15 is rotatably arranged on the supporting ring 17, the position of the rod portion 14 is avoided, and the supporting ring 17 is located at one side of the abutting portion 16, so that the redundant space occupation is saved as much as possible.
Further, also include
The sleeve member 18 is rotatably arranged at the telescopic end of the telescopic rod 4, penetrates through the limiting ring 12, the ground shaft 6 is in ball hinge joint with the sleeve member 18 through a universal member, after the telescopic rod 4 stretches, the sleeve member 18 is close to or far away from the center shaft of the second elliptical guide rail 2, the moon member 19 is detachably arranged on the sleeve member 18 and is positioned at one side of the earth member 7,
a second gear member 20 rotatably disposed on the telescopic rod 4 and located on one side of the sleeve member 18 and engaged with teeth on the sleeve member 18.
In this embodiment, in order to further improve the functionality of the demonstration instrument, to demonstrate the real situation of the revolution of the moon around the earth to students, the sleeve member 18 is added, and is rotatably arranged on the sliding table member and penetrates through the limiting ring 12, so that the sleeve member 18 is limited to rotate around the earth while the moon member 19 is conveniently driven to rotate subsequently, power is provided, in order to prevent the addition of the sleeve member 18 from influencing the rotation of the ground shaft 6, the ground shaft 6 is in ball hinge joint with the sleeve member 18 through a universal member, and after the telescopic rod 4 is telescopic, the sleeve member 18 is close to or far away from the circular mandrel of the second elliptical guide rail 2; in order to facilitate the disassembly of the moon member 19, the moon member 19 is designed to be detachably arranged on the sleeve member 18, so that the revolution of the moon around the earth can be realized, the second gear member 20 is rotatably arranged on the sliding table member and positioned on one side of the sleeve member 18 and meshed with teeth on the sleeve member 18, power is provided for the rotation of the sleeve member 18, and the second gear member is positioned in a space and can also play a role in protection; after the lunar part 19 is added, for the application of the universal part, the actual situation needs to satisfy that an included angle of 5 degrees is formed between the revolution surface of the lunar part and the revolution surface of the earth, and the shaft sleeve angle of the universal part can be adjusted, namely, the shaft sleeve plane of the universal part and the shaft sleeve plane of the sleeve part 18 have an included angle of 5 degrees, so that the demonstration authenticity of the demonstrator is improved.
Further, the base 5 comprises
A sliding block 21 which is arranged on the first elliptical guide rail 1 in a sliding way, a gap 22 is arranged between the sliding block 21 and the first elliptical guide rail 1,
the ground shaft support 23 is provided with the limiting shaft 11, the ground shaft support 23 penetrates through the interval 22, and the ground shaft 6 is rotatably arranged on the ground shaft support 23.
In this embodiment, in order to make the structural style of base 5 simpler, reduce cost, satisfy the service condition simultaneously, convenient dismantlement installation, design base 5 includes slider 21 and earth's axle support 23, slider 21 slides and sets up on first oval guide rail 1 to form interval 22 with first oval guide rail 1 between, the earth's axle support 23 that has spacing axle 11 runs through interval 22, slider 21 just can retrain earth's axle support 23, has certain activity level between the two simultaneously, the condition of screens takes place when preventing the operation of whole demonstration appearance, and rotate earth's axle 6 and set up on earth's axle support 23, provide stable holding power.
Further, the first elliptical guide rail 1 circular spindle, the second elliptical guide rail 2 circular spindle and the first gear member 15 are eccentrically arranged in the rotation axis direction.
In this embodiment, in order to make the whole demonstration instrument operate stably, the first elliptical guide rail 1 circular spindle, the second elliptical guide rail 2 circular spindle and the first gear member 15 are designed to rotate axially and are arranged eccentrically.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (8)
1. The device for demonstrating the three stars in the sun, the earth and the moon is characterized by comprising
The machine frame is provided with a first elliptical guide rail (1) and a second elliptical guide rail (2), the first elliptical guide rail (1) and the second elliptical guide rail (2) are longitudinally provided with intervals and are transversely staggered,
the guide rod (3) is rotatably arranged on the circular mandrel of the first elliptical guide rail (1),
the telescopic rod (4) is rotationally arranged on the circular mandrel of the second elliptical guide rail (2), the guide rod (3) and the telescopic rod (4) are crosswise arranged and synchronously rotate in the same direction,
a base (5) which is in clearance fit with the guide rod (3), the guide rod (3) rotates to drive the base (5) to move on the first elliptical guide rail (1),
a ground shaft (6) which is rotatably arranged on the base (5) and is in ball joint with the telescopic rod (4), the guide rod (3) and the telescopic rod (4) rotate to drive the ground shaft (6) to move along the first elliptical guide rail (1) and the second elliptical guide rail (2),
a terrestrial member (7) arranged at one end of the terrestrial shaft (6),
a sun piece (8) arranged on the frame, the earth piece (7) is positioned at one side of the sun piece (8),
and the moon piece (19) is arranged on the telescopic rod (4).
2. The earth-sun-moon three-star demonstration instrument according to claim 1, further comprising
The housing (9), the frame sets up the housing (9) bottom, housing (9) top with form oval guide slot (10) between second oval guide rail (2), earth's axis (6) run through oval guide slot (10).
3. The ground-day three-month-star demonstration instrument according to claim 2, characterized in that the base (5) has a limiting shaft (11), further comprising
The limiting ring (12) is arranged on the telescopic end of the telescopic rod (4), the limiting ring (12) penetrates through the elliptical guide groove (10), the ground shaft (6) is in ball hinge joint with the limiting ring (12), the ground shaft (6) penetrates through the limiting ring (12),
the connecting cylinder (13), guide arm (3) run through connecting cylinder (13), just guide arm (3) with connecting cylinder (13) clearance fit, connecting cylinder (13) have connecting portion (24), spacing axle (11) run through connecting portion (24).
4. A three-star daily, earth and moon demonstration instrument according to claim 3, characterized in that the guide rod (3) has a stem (14) and further comprises
The telescopic device comprises a first gear piece (15), wherein the first gear piece (15) is rotatably arranged on a circular mandrel of a first elliptical guide rail (1), one end of the first gear piece (15) is meshed with teeth on a guide rod (3), the other end of the first gear piece is meshed with teeth on a telescopic rod (4), the bottom surface of the first gear piece (15) is higher than the top surface of a rod portion (14), the rod portion (14) penetrates through a connecting cylinder (13), the rod portion (14) is in clearance fit with the connecting cylinder (13), the telescopic rod (4) is in butt joint with the circular mandrel of the first elliptical guide rail (1), and the teeth on the guide rod (3), the teeth on the first gear piece (15) and the teeth on the telescopic rod (4) are identical.
5. The sun-earth-moon three-star demonstration instrument according to claim 4, wherein the center axis of the first elliptical guide rail (1) is provided with an abutting portion (16) and a supporting ring (17), the supporting ring (17) is positioned on one side of the abutting portion (16), the telescopic rod (4) abuts against the abutting portion (16), and the first gear piece (15) is rotatably arranged on the supporting ring (17).
6. The three-star daily, earth and moon demonstration instrument according to claim 3, further comprising
The sleeve member (18) is rotatably arranged at the telescopic end of the telescopic rod (4) and penetrates through the limiting ring (12), the ground shaft (6) is in spherical hinge connection with the sleeve member (18) through a universal piece, after the telescopic rod (4) stretches, the sleeve member (18) is close to or far away from the center shaft of the second elliptical guide rail (2), the moon member (19) is detachably arranged on the sleeve member (18) and is positioned at one side of the earth member (7),
the second gear piece (20) is rotatably arranged on the telescopic rod (4), is positioned on one side of the sleeve piece (18) and is meshed with teeth on the sleeve piece (18).
7. A three-star daily, earth and moon demonstration instrument according to claim 3, characterized in that the base (5) comprises
A sliding block (21) which is arranged on the first elliptical guide rail (1) in a sliding way, a gap (22) is arranged between the sliding block (21) and the first elliptical guide rail (1),
the ground shaft support (23) is provided with the limiting shaft (11), the ground shaft support (23) penetrates through the interval (22), and the ground shaft (6) is rotatably arranged on the ground shaft support (23).
8. The sun-earth-moon three-star demonstration instrument according to claim 4, wherein the first elliptical guide rail (1) circular spindle, the second elliptical guide rail (2) circular spindle and the first gear member (15) are eccentrically arranged in the rotation axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320712905.6U CN219512755U (en) | 2023-04-03 | 2023-04-03 | Demonstration instrument for three stars of sun, earth, moon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320712905.6U CN219512755U (en) | 2023-04-03 | 2023-04-03 | Demonstration instrument for three stars of sun, earth, moon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219512755U true CN219512755U (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320712905.6U Active CN219512755U (en) | 2023-04-03 | 2023-04-03 | Demonstration instrument for three stars of sun, earth, moon |
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| CN118049594A (en) * | 2024-04-16 | 2024-05-17 | 合肥国源展览展示有限公司 | Museum safety protection system based on WIFI channel state information |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118049594A (en) * | 2024-04-16 | 2024-05-17 | 合肥国源展览展示有限公司 | Museum safety protection system based on WIFI channel state information |
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