A coupling pendulum with variable pendulum length

Abstract

The present invention belongs to the technical field of teaching instruments, and specifically relates to a coupling pendulum with variable pendulum length. The purpose of the present invention is to solve the technical problem of the vibration of the coupling pendulum under different pendulum lengths. The present invention comprises a base, a first pendulum ball and a second pendulum ball. A column is arranged on the base, and a first through hole pendulum ...

Description

Technical Field

[0001] The invention belongs to the technical field of teaching instruments, and in particular relates to a coupling pendulum with variable pendulum length. Background Art

[0002] In physics, there are ubiquitous vibration systems that interact with each other, namely coupled vibration systems. For example, in electricity, the coupled oscillation circuit composed of capacitors and inductors, the vibration of adjacent atoms in a solid lattice, and the electromagnetic coupling of photons and phonons are all coupled vibrations. In mechanics, coupled pendulums are used to study the phenomenon of coupled vibrations. A coupled pendulum is formed by connecting the pendulum balls of two simple pendulums with a spring. However, the pendulum length of the coupled pendulum in the prior art is fixed and cannot be adjusted, and the spring of the coupled pendulum cannot be replaced, which means that the frequency change of the beat phenomenon during the vibration of the coupled pendulum cannot be well observed. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problem of vibration of a coupled pendulum under different pendulum lengths, and to provide a coupled pendulum with a variable pendulum length. To solve the above technical problem, the technical solution adopted by the present invention is:

[0004] A coupling pendulum with variable pendulum length comprises a base, a first pendulum ball and a second pendulum ball, a column is arranged on the base, a first through hole penetrating through the column from top to bottom is arranged in the middle of the upper panel of the column, a lifting device is arranged in the first through hole, and the lifting device can move in the first through hole, the lifting device comprises a lifting column, a connecting block is arranged on the lifting column, and the connecting block and the lifting column are arranged in a T shape, a rectangular platform is arranged on the front panel of the connecting block, a second through hole penetrating through the left and right of the rectangular platform is arranged in the middle of the right panel of the rectangular platform, a first telescopic block and a second telescopic block are symmetrically arranged in the second through hole, a first wire groove is arranged on the left and right sides of the first telescopic block and the second telescopic block, a first pulley and a second pulley are respectively arranged at the rear of the column and the rear panel of the connecting block, and a third pulley and a fourth pulley are symmetrically arranged on the rectangular platform. Pulley No. 1 and pulley No. 2 are double-groove pulleys, one wire of the pulley No. 1 is connected to the pendulum ball No. 1 through the pulley No. 2, the pulley No. 3 and the wire groove No. 1 in sequence, and the other wire of the pulley No. 1 is connected to the pendulum ball No. 2 through the pulley No. 2, the pulley No. 4 and the wire groove No. 1 in sequence, and the pendulum ball No. 1 and the pendulum ball No. 2 are connected through a spring, and the pulley No. 1 and the pulley No. 2 are driven by rotating the handle, and the length of the wire passing through the pulley No. 3 and the pulley No. 4 is controlled at the same time, thereby increasing or shortening the length of the cycloid connecting the pendulum ball No. 1 4 and the pendulum ball No. 2 5 at the same time, and changing the frequency of the beat phenomenon in the coupled pendulum motion by adjusting the pendulum length or the spring between the two pendulum balls, which will make the physical motion process of the coupled pendulum more vivid, help students deepen their understanding of the coupled pendulum, and at the same time improve students' observation and spatial imagination, and have a deeper understanding of the beat phenomenon in the coupled pendulum.

[0005] Furthermore, a plurality of card slots are symmetrically provided on the left and right panels of the lifting column and the front and rear panels of the first telescopic block and the second telescopic block. Clamping devices are symmetrically provided on the upper panels of the columns on the left and right sides of the lifting column and the front and rear sides of the first telescopic block and the second telescopic block and the left and right panels of the rectangular platform. The clamping devices and the card slots are used in matching manner. By setting the card slots and the clamping devices, the lifting column, the first telescopic block and the second telescopic block can all be stopped at designated positions, and the distance between the card slots can also be changed to achieve locking at different positions.

[0006] Furthermore, the clamping device includes a clamping seat, a slider is provided in the clamping seat, and a plug-in is provided on the slider, so that by sliding the slider, the plug-in is driven to be inserted into the slot, and by sliding the slider, the plug-in enters the slot, thereby locking the lifting column, the first telescopic block and the second telescopic block.

[0007] Furthermore, two No. 2 wire grooves are symmetrically provided on the upper panel of the connection block, ensuring that the wires connecting the No. 2 pulley with the No. 3 pulley and the No. 4 pulley will not move.

[0008] Furthermore, a pressure plate is provided on the left panel of the first telescopic block and the right panel of the second telescopic block, which further ensures that the wires of the left panel of the first telescopic block and the right panel of the second telescopic block will not jump out of the first wire groove due to pulling the swing ball.

[0009] Furthermore, the pressure plate is fixed to the left panel of the first telescopic block and the right panel of the second telescopic block by multiple bolts, and the bolt fixation makes it easy to disassemble and install the pressure plate.

[0010] Furthermore, a handle is provided on one side of the rotating shaft of the first pulley, so that the first pulley can be driven to rotate by rotating the handle.

[0011] Furthermore, support blocks are provided at the four corners of the bottom of the base, so that when the entire device is placed on a desktop or a laboratory table, a gap is left between the base and the surface of the desktop or the laboratory table by providing the support blocks, making it more convenient for experimenters to take and place the entire device.

[0012] Furthermore, a fixing block is provided on the rear panel of the column for setting the No. 1 pulley; the spring is connected to the No. 1 pendulum ball and the No. 2 pendulum ball through threads, and the No. 1 pulley and the No. 2 pulley are ensured to be in the same horizontal plane by setting the fixing block, and the spring is connected to the No. 1 pendulum ball and the No. 2 pendulum ball through threads, so that the spring can be unscrewed when not in use.

[0013] Furthermore, the No. 1 pulley and the No. 2 pulley are respectively fixed to the rear panels of the fixed block and the connecting block through fixed seats, and the No. 3 pulley and the No. 4 pulley are fixed to the rectangular platform through fixed seats, and the fixed seat includes two vertical plates and a horizontal plate, and the two vertical plates are vertically arranged on the horizontal plate, and two No. 3 through holes are symmetrically provided on the two vertical plates for connecting with the rotating shaft of the No. 1 pulley, the No. 2 pulley, the No. 3 pulley or the No. 4 pulley.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention drives the first and second pulleys by rotating the handle, and controls the length of the line passing through the third and fourth pulleys at the same time, thereby simultaneously increasing or shortening the length of the cycloid connecting the first pendulum ball 4 and the second pendulum ball 5, so that the frequency of the beat phenomenon in the coupled pendulum motion can be changed by adjusting the pendulum length. At the same time, the spring between the two pendulum balls is detachable, and the frequency change of the beat phenomenon in the coupled pendulum can also be observed by using different springs. This will make the physical movement process of the coupled pendulum more visual, help students deepen their understanding of the coupled pendulum, and at the same time improve students' observation and spatial imagination, and have a deeper understanding of the beat phenomenon in the coupled pendulum.

[0016] 2. The present invention symmetrically provides a plurality of slots on the left and right panels of the lifting column, and the front and rear panels of the first telescopic block and the second telescopic block; symmetrically provides clamping devices on the upper panels of the columns on the left and right sides of the lifting column, and on the left and right panels of the rectangular platform on the front and rear sides of the first telescopic block and the second telescopic block; the clamping devices and the slots are matched for use; by providing the slots and the clamping devices, the lifting column, the first telescopic block and the second telescopic block can all be stopped at designated positions, and the distance between the slots can also be changed to achieve locking at different positions.

[0017] 3. The clamping device of the present invention includes a clamping seat, a slider is provided in the clamping seat, and a plug-in is provided on the slider, so that the plug-in is driven to be inserted into the card slot by sliding the slider, and the plug-in enters the card slot by sliding the slider, thereby locking the lifting column, the first telescopic block and the second telescopic block.

[0018] 4. The present invention symmetrically provides two No. 2 wire grooves on the upper panel of the connecting block, thereby ensuring that the wires connecting the No. 2 pulley with the No. 3 pulley and the No. 4 pulley will not move.

[0019] 5. The present invention provides a pressure plate on the left panel of the No. 1 telescopic block and the right panel of the No. 2 telescopic block, further ensuring that the wires of the left panel of the No. 1 telescopic block and the right panel of the No. 2 telescopic block will not jump out of the No. 1 wire groove due to pulling the swing ball.

[0020] 6. The pressing plate of the present invention is fixed to the left panel of the No. 1 telescopic block and the right panel of the No. 2 telescopic block by multiple bolts. The fixing by bolts facilitates the disassembly and installation of the pressing plate.

[0021] 7. The present invention provides a handle on one side of the first pulley shaft, so that the first pulley can be driven to rotate by rotating the handle.

[0022] 8. The present invention provides support blocks at the four corners of the bottom of the base, so that when the entire device is placed on a desktop or a laboratory table, a gap is left between the base and the surface of the desktop or the laboratory table by providing the support blocks, making it more convenient for experimenters to take and place the entire device.

[0023] 9. The present invention provides a fixing block on the rear panel of the column for setting the No. 1 pulley; the spring is connected to the No. 1 swing ball and the No. 2 swing ball through threads, and the fixing block is provided to ensure that the No. 1 pulley and the No. 2 pulley are in the same horizontal plane, and the spring is connected to the No. 1 swing ball and the No. 2 swing ball through threads so that the spring can be unscrewed when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional front view structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional rear view structure of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the column of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a rectangular parallelepiped platform of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the card holder of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the second telescopic block of the present invention;

[0030] Figure 7 It is a schematic diagram of the exploded structure of the connection between the spring end and the first pendulum ball of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the fixing seat of the present invention;

[0032] In the figure: 1-base, 2-column, 201-through hole No. 1, 3-lifting device, 301-lifting column, 302-connecting block, 303-rectangular platform, 304-through hole No. 2, 305-telescopic block No. 1, 306-telescopic block No. 2, 307-wire groove No. 1, 308-pulley No. 1, 309-pulley No. 2, 310-pulley No. 3, 311-pulley No. 4, 312-slot, 313-clamping device, 314-slot, 315-slider, 316-plug-in, 317-wire groove No. 2, 318-pressing plate, 319-handle, 320-fixed block, 321-fixed seat, 322-vertical plate, 323-horizontal plate, 324-through hole No. 3, 4-swing ball No. 1, 5-swing ball No. 2, 6-spring, 7-support block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example

[0035] like Figure 1-8As shown, a coupling pendulum with variable pendulum length comprises a base 1, a first pendulum ball 4 and a second pendulum ball 5, support blocks 7 are arranged at four corners of the bottom of the base 1, a column 2 is arranged on the base 1, a first through hole 201 pendulum-penetrating the column 2 is arranged in the middle of the upper panel of the column 2, a lifting device 3 is arranged in the first through hole 201, and the lifting device 3 can move in the first through hole 201, the lifting device 3 comprises a lifting column 301, a connecting block 302 is arranged on the lifting column 301, and the connecting block 302 and the lifting column 301 are arranged in a T-shape. Two No. 2 wire grooves 317 are symmetrically arranged on the upper panel of the connecting block 302, a rectangular platform 303 is arranged on the front panel of the connecting block 302, a No. 2 through hole 304 is arranged in the middle of the right panel of the rectangular platform 303 and runs through the left and right sides of the rectangular platform 303, a No. 1 telescopic block 305 and a No. 2 telescopic block 306 are symmetrically arranged in the No. 2 through hole 304, a No. 1 wire groove 307 is arranged on the left and right panels of the No. 1 telescopic block 305 and the No. 2 telescopic block 306, and a No. 1 wire groove 307 is arranged on the left panel of the No. 1 telescopic block 305 and the No. 2 telescopic block 306. The right panel of each column 2 is provided with a pressing plate 318, and the pressing plate 318 is fixed to the left panel of the first telescopic block 305 and the right panel of the second telescopic block 306 by multiple bolts. A first pulley 308 and a second pulley 309 are respectively provided at the rear of the column 2 and the rear panel of the connecting block 302. A fixing block 320 is provided on the rear panel of the column 2 for setting the first pulley 308. A handle 319 is provided on one side of the rotating shaft of the first pulley 308, so that the first pulley 308 can be driven to rotate by rotating the handle 319, and the first pulley 308 can be driven to rotate on the rectangular platform 303. A third pulley 310 and a fourth pulley 311 are provided, the first pulley 308 and the second pulley 309 are double-groove pulleys, one wire of the first pulley 308 is connected to the first pendulum ball 4 through the second pulley 309, the third pulley 310 and the first wire groove 307 in sequence, the other wire of the first pulley 308 is connected to the second pendulum ball 5 through the second pulley 309, the fourth pulley 311 and the first wire groove 307 in sequence, the first pendulum ball 4 and the second pendulum ball 5 are connected through a spring 6, and the spring 6 is connected to the first pendulum ball 4 and the second pendulum ball 5 through a thread.

[0036] A plurality of slots 312 are symmetrically provided on the left and right panels of the lifting column 301 and the front and rear panels of the first telescopic block 305 and the second telescopic block 306. Clamping devices 313 are symmetrically provided on the upper panels of the column 2 on the left and right sides of the lifting column 301 and the front and rear sides of the first telescopic block 305 and the second telescopic block 306 on the left and right panels of the rectangular platform 303. The clamping devices 313 and the slots 312 are used in matching manner. The clamping devices 313 include a clamping seat 314, a slider 315 is provided in the clamping seat 314, and a plug-in 316 is provided on the slider 315, so that the plug-in 316 is driven to insert into the slot 312 by sliding the slider 315.

[0037] The first pulley 308 and the second pulley 309 are respectively fixed to the rear panels of the fixed block 320 and the connecting block 302 through the fixed seat 321, and the third pulley 310 and the fourth pulley 311 are fixed to the rectangular platform 303 through the fixed seat 321. The fixed seat 321 includes two vertical plates 322 and a horizontal plate 323. The two vertical plates 322 are vertically arranged on the horizontal plate 323. Two third through holes 324 are symmetrically arranged on the two vertical plates 322 for connecting with the rotating shaft of the first pulley 308, the second pulley 309, the third pulley 310 or the fourth pulley 311.

[0038] Working principle: firstly, select the spring 6, and then screw it on the No. 1 pendulum ball 4 and the No. 2 pendulum ball 5, adjust the telescopic length of the No. 1 telescopic block 305 and the No. 2 telescopic block 306, so that the spring 6 is in the initial natural state without stretching, and the wire connecting the No. 1 pendulum ball 4 and the No. 2 pendulum ball 5 is kept naturally perpendicular to the plane of the base 1, and then adjust the height of the lifting column 301, so that the No. 1 pendulum ball 4 and the No. 2 pendulum ball 5 do not touch the panel on the base 1 during the swinging process, and finally turn the handle 319 to adjust the distance between the No. 1 pendulum ball 4 and the No. 2 pendulum ball 5 and the panel on the base 1, and observe different motion states of the coupling pendulum (the clamping device 313 can ensure that the No. 1 telescopic block 305, the No. 2 telescopic block 306 and the lifting column 301 will not move when the required length or height is adjusted).

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A coupling pendulum with variable pendulum length, characterized in that: The invention comprises a base (1), a first pendulum ball (4) and a second pendulum ball (5); a column (2) is arranged on the base (1); a first through hole (201) pendulum-penetrating the column (2) is arranged in the middle of an upper panel of the column (2); a lifting device (3) is arranged in the first through hole (201), and the lifting device (3) is movable in the first through hole (201); the lifting device (3) comprises a lifting column (301); a connecting block (302) is arranged on the lifting column (301); and The connecting block (302) and the lifting column (301) are arranged in a T shape, a rectangular platform (303) is provided on the front panel of the connecting block (302), a second through hole (304) penetrating the left and right sides of the rectangular platform (303) is provided in the middle of the right panel of the rectangular platform (303), a first telescopic block (305) and a second telescopic block (306) are symmetrically arranged in the second through hole (304), and the left and right panels of the first telescopic block (305) and the second telescopic block (306) are both A first wire groove (307) is provided, a first pulley (308) and a second pulley (309) are provided at the rear of the column (2) and the rear panel of the connecting block (302), respectively, a third pulley (310) and a fourth pulley (311) are symmetrically provided on the rectangular platform (303), the first pulley (308) and the second pulley (309) are double-groove pulleys, and a wire of the first pulley (308) passes through the second pulley (309), the third pulley (310) and the first wire in sequence. The groove (307) is connected to the first pendulum ball (4); another wire of the first pulley (308) passes through the second pulley (309), the fourth pulley (311) and the first wire groove (307) in sequence to be connected to the second pendulum ball (5); the first pendulum ball (4) and the second pendulum ball (5) are connected via a spring (6); the spring (6) between the first pendulum ball (4) and the second pendulum ball (5) is detachable and replaceable; by replacing different springs (6), the frequency change of the coupled swing-in-beat phenomenon can also be observed.

2. A coupling pendulum with variable pendulum length according to claim 1, characterized in that: A plurality of slots (312) are symmetrically provided on the left and right panels of the lifting column (301) and the front and rear panels of the first telescopic block (305) and the second telescopic block (306); clamping devices (313) are symmetrically provided on the left and right sides of the lifting column (301) and the upper panels of the column (2), and the front and rear sides of the first telescopic block (305) and the second telescopic block (306) and the left and right panels of the rectangular platform (303); the clamping devices (313) and the slots (312) are matched for use.

3. A coupling pendulum with variable pendulum length according to claim 2, characterized in that: The clamping device (313) comprises a clamping seat (314), a slider (315) is provided in the clamping seat (314), and a plug-in (316) is provided on the slider (315), so that the slider (315) is slid to drive the plug-in (316) to be inserted into the clamping slot (312).

4. The coupling pendulum with variable pendulum length according to claim 1, characterized in that: Two No. 2 wire grooves (317) are symmetrically arranged on the upper panel of the connection block (302).

5. The coupling pendulum with variable pendulum length according to claim 1, characterized in that: A pressing plate (318) is provided on the left panel of the first telescopic block (305) and the right panel of the second telescopic block (306).

6. A coupling pendulum with variable pendulum length according to claim 5, characterized in that: The pressing plate (318) is fixed to the left panel of the first telescopic block (305) and the right panel of the second telescopic block (306) by means of a plurality of bolts.

7. The coupling pendulum with variable pendulum length according to claim 1, characterized in that: A handle (319) is provided on one side of the rotating shaft of the first pulley (308), so that the first pulley (308) can be driven to rotate by rotating the handle (319).

8. The coupling pendulum with variable pendulum length according to claim 1, characterized in that: Support blocks (7) are provided at the four corners of the bottom of the base (1).

9. The coupling pendulum with variable pendulum length according to claim 1, characterized in that: A fixing block (320) is provided on the rear panel of the column (2) for arranging a first pulley (308); the spring (6) is connected to the first pendulum ball (4) and the second pendulum ball (5) via threads.

10. The coupling pendulum with variable pendulum length according to claim 9, characterized in that: The first pulley (308) and the second pulley (309) are respectively fixed to the rear panels of the fixed block (320) and the connecting block (302) through a fixed seat (321); the third pulley (310) and the fourth pulley (311) are fixed to the rectangular platform (303) through the fixed seat (321); the fixed seat (321) comprises two vertical plates (322) and a horizontal plate (323); the two vertical plates (322) are vertically arranged on the horizontal plate (323); two third through holes (324) are symmetrically arranged on the two vertical plates (322) for connecting with the rotating shaft of the first pulley (308), the second pulley (309), the third pulley (310) or the fourth pulley (311).

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