CN108766133B

CN108766133B - Vibration experiment rapid demonstration instrument

Info

Publication number: CN108766133B
Application number: CN201810622239.0A
Authority: CN
Inventors: 严其嘉
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-15
Filing date: 2018-06-15
Publication date: 2020-07-31
Anticipated expiration: 2038-06-15
Also published as: CN108766133A

Abstract

The invention discloses a vibration experiment rapid demonstration instrument which comprises a box body, wherein a box cover is arranged on one side of the box body, supporting seats are symmetrically and fixedly arranged on the inner walls of the two sides of the box body, one side, close to each other, of each supporting seat is fixedly provided with a same supporting rod, a plurality of display rods are fixedly arranged on the two sides of each supporting rod at equal intervals, two mounting seats are symmetrically and fixedly arranged on one side of each supporting rod, one side, far away from each supporting rod, of each mounting seat is provided with a mounting groove, a fixing seat is slidably mounted in each mounting groove, the bottom of each fixing seat is in contact with the inner wall of the bottom of each mounting groove, a slotter is fixedly mounted at the top of each fixing seat, the top of each slotter extends out of each mounting groove. The invention has simple structure and low manufacturing cost, and can demonstrate different experimental phenomena by quickly disassembling and assembling the shaker, thereby being convenient for teaching use.

Description

Vibration experiment rapid demonstration instrument

Technical Field

The invention relates to the technical field of teaching appliances, in particular to a vibration experiment rapid demonstration instrument.

Background

In the physical teaching process, the vibration of a single-degree-of-freedom object is generally demonstrated by adopting a model of a spring vibrator. For the vibration of an infinite freedom object, demonstration is generally carried out by a simple beam or a cantilever beam.

Through retrieval, patent document No. CN106448364B discloses a simply supported beam experimental demonstration instrument, which performs intuitive demonstration on each order of principal mode of the simply supported beam by amplifying displacement vibration of the simply supported beam, and facilitates the explanation of infinite freedom degree object vibration mode teaching experiment. The beam body vibrates under the excitation of the vibration exciter, and when the excitation frequency of the vibration exciter is equal to a certain order natural frequency of the beam body, the beam body can resonate, and the vibration form of the beam body is close to the corresponding main vibration mode. When the excitation frequency of the vibration exciter is slowly increased, the change of the beam body from the first-order main vibration mode to the second-order third-order main vibration mode can be seen. Through the contrast observation to multistage mode of shaking, deepen the understanding of mode stack to the vibration, nevertheless its structure is comparatively complicated, tests through setting up three simple beam, greatly increased the manufacturing of instrument swagger, and when the vibration exciter damaged, be difficult for changing.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a vibration experiment rapid demonstration instrument.

The invention provides a vibration experiment rapid demonstration instrument which comprises a box body, wherein a box cover is arranged on one side of the box body, supporting seats are symmetrically and fixedly arranged on the inner walls of the two sides of the box body, one side, close to each other, of each supporting seat is fixedly provided with a same supporting rod, a plurality of display rods are fixedly arranged on the two sides of each supporting rod at equal intervals, two mounting seats are symmetrically and fixedly arranged on one side of each supporting rod, one side, far away from each supporting rod, of each mounting seat is provided with a mounting groove, a fixing seat is slidably arranged in each mounting groove, the bottom of each fixing seat is in contact with the inner wall of the bottom of each mounting groove, a sloshing device is fixedly arranged on the top;

the clamping rod is slidably mounted in the through hole, two ends of the clamping rod extend out of the through hole, wedge-shaped grooves with openings at the bottoms are formed in the sides, away from each other, of the two fixing seats, clamping grooves are formed in the inner walls, close to each other, of the two wedge-shaped grooves, one ends, close to each other, of the two clamping rods respectively penetrate through the two wedge-shaped grooves and are slidably mounted in the two clamping grooves respectively, grooves are formed in the inner walls, away from the supporting rod, of the through hole, and fixing blocks are fixedly mounted on the sides, away from the supporting; one side that the kelly was kept away from to the fixed block extends to in the recess, and rotates and install the push rod, and the push rod slope sets up, and fixed mounting has the supporting shoe on the recess was kept away from one side inner wall of mounting groove, and fixed mounting has the slide bar on the recess was kept away from one side inner wall of recess open-ended, and the slide bar is close to recess open-ended one end fixed mounting on the supporting shoe, and the slip cover is equipped with the slide.

Preferably, the display rod is provided with a cavity, iron sand powder is arranged in the cavity, and the display rod is made of transparent materials.

Preferably, a coil is wound at the central position of the support rod.

Preferably, the locating groove is formed in the inner wall of one side, close to each other, of the two mounting grooves, the locating block is fixedly mounted on one side, close to each other, of the two fixing seats, and the locating block is connected with the locating groove in a sliding mode.

Preferably, one end of the clamping rod, which is positioned in the clamping groove, is nested with a ball, and the ball is matched with the wedge-shaped groove.

Preferably, a limiting groove is formed in the inner wall of one side, close to the supporting rod, of the through hole, a limiting block is fixedly mounted on one side, close to the supporting rod, of the clamping rod, and the limiting block is connected with the limiting groove in a sliding mode.

Preferably, the one end that the fixed block was kept away from to the push rod is rotated and is installed on the slide, and the cover is equipped with the spring of welding on the slide, and the one end welding that the slide was kept away from to the spring is on the recess keeps away from one side inner wall of recess open-ended.

Preferably, the ends, far away from each other, of the two clamping rods are vertically and fixedly provided with pull rods, and anti-skidding sleeves are fixedly sleeved on the pull rods.

The invention has the beneficial effects that: through the matching of the box body, the box cover, the supporting seat, the supporting rod, the display rod, the mounting seats, the mounting groove, the fixed seat, the agitator, the through hole, the clamping rod, the wedge-shaped groove, the clamping groove, the fixed block, the push rod, the supporting block, the sliding rod, the sliding seat and the spring, the agitator is mounted on one of the mounting seats on the supporting rod, namely the agitator and the fixed seat are clamped into the mounting groove, at the moment, the positioning block is clamped into the positioning groove, the clamping rod and the rolling ball are clamped into the wedge-shaped groove, the agitator is pressed, the rolling ball rolls on the inner wall of the wedge-shaped groove and pushes the clamping rod, the clamping rod moves to drive the fixed block to move, the fixed block moves to push the push rod, the push rod further pushes the sliding seat to slide on the sliding rod, so as to compress the spring, when the through hole is aligned with the groove, the clamping rod is reset and clamped, electrifying the coil to enable the vibration frequency of the oscillator to reach a first-order natural frequency, enabling the vibration form of the support rod to be close to a first-order main vibration mode, observing the shape of the iron sand powder, then pulling the clamping rod by utilizing the pull rod, driving the clamping rod by utilizing the pull rod, enabling the clamping rod to move out of the clamping groove, disassembling the oscillator, then installing the oscillator on the other installation seat according to the installation steps, starting the oscillator, electrifying the coil to enable the vibration frequency of the oscillator to reach a second-order natural frequency, enabling the vibration form of the support rod to be close to a second-order main vibration mode, observing the shape of the iron sand powder, simultaneously installing the oscillators on the two installation seats, respectively adjusting the frequencies of the two oscillators to the first-order natural frequency and the second-order natural frequency, electrifying the coil to observe the shape of the iron sand powder, and simultaneously facilitating the understanding of the superposition of the mold body by students through the three experimental observation phenomena, the invention has simple structure and low manufacturing cost, and can demonstrate different experimental phenomena by quickly disassembling and assembling the shaker, thereby being convenient for teaching use.

Drawings

FIG. 1 is a schematic cross-sectional view of a vibration experiment rapid demonstration instrument according to the present invention;

FIG. 2 is a schematic cross-sectional view of part A of a vibration experiment rapid demonstration instrument according to the present invention;

FIG. 3 is a schematic cross-sectional view of portion B of FIG. 2;

fig. 4 is a schematic cross-sectional structure view of a portion C in fig. 3.

In the figure: the device comprises a box body 1, a box cover 2, a supporting seat 3, a supporting rod 4, a display rod 5, an installation seat 6, a mounting groove 7, a fixing seat 8, a shaker 9, a through hole 10, a clamping rod 11, a wedge-shaped groove 12, a clamping groove 13, a groove 14, a fixing block 15, a push rod 16, a supporting block 17, a sliding rod 18, a sliding seat 19 and a spring 20.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples.

Examples

Referring to fig. 1-4, the embodiment provides a vibration experiment rapid demonstration instrument, which includes a box body 1, a box cover 2 is arranged on one side of the box body 1, supporting seats 3 are symmetrically and fixedly mounted on inner walls of two sides of the box body 1, one side, close to each other, of each of the two supporting seats 3 is fixedly mounted with a same supporting rod 4, a plurality of display rods 5 are fixedly mounted on two sides of each supporting rod 4 at equal intervals, two mounting seats 6 are symmetrically and fixedly mounted on one side of each supporting rod 4, a mounting groove 7 is formed in one side, far away from each supporting rod 4, of each mounting seat 6, a fixing seat 8 is slidably mounted in each mounting groove 7, the bottom of each fixing seat 8 is in contact with the inner wall of the bottom of each mounting groove 7, a slotter 9 is fixedly mounted on the top of each fixing seat 8; clamping rods 11 are slidably mounted in the through holes 10, two ends of each clamping rod 11 extend out of the through holes 10, wedge-shaped grooves 12 with openings at the bottoms are formed in the sides, away from each other, of the two fixing seats 8, clamping grooves 13 are formed in the inner walls, close to each other, of the two wedge-shaped grooves 12, one ends, close to each other, of the two clamping rods 11 penetrate through the two wedge-shaped grooves 12 respectively and are mounted in the two clamping grooves 13 in a sliding mode respectively, grooves 14 are formed in the inner walls, away from the supporting rods 4, of the through holes 10, and fixing blocks 15 are fixedly mounted on the sides, away from the supporting; one side of a fixed block 15 far away from a clamping rod 11 extends into a groove 14, a push rod 16 is rotatably installed, the push rod 16 is obliquely arranged, a supporting block 17 is fixedly installed on the inner wall of one side of the groove 14 far away from an installation groove 7, a sliding rod 18 is fixedly installed on the inner wall of one side of the groove 14 far away from an opening of the groove 14, one end, close to the opening of the groove 14, of the sliding rod 18 is fixedly installed on the supporting block 17, a sliding seat 19 is slidably sleeved on the sliding rod 18, and through cooperation of a box body 1, a box cover 2, a supporting seat 3, a supporting rod 4, a display rod 5, an installation seat 6, the installation groove 7, a fixed seat 8, a shaker 9, a through hole 10, the clamping rod 11, a wedge-shaped groove 12, a clamping groove 13, the groove 14, a fixed block 15, the push rod 16, the supporting block 17, the sliding rod 18, the sliding seat 19, at the moment, the positioning block is clamped into the positioning groove, the clamping rod 11 and the ball are clamped into the wedge-shaped groove 12, the agitator 9 is pressed, the ball rolls on the inner wall of the wedge-shaped groove 12 and pushes the clamping rod 11, the clamping rod 11 moves to drive the fixing block 15 to move, the fixing block 15 moves to push the push rod 16, the push rod 16 pushes the sliding seat 19 to slide on the sliding rod 18, so that the spring 20 is compressed, when the through hole 10 is aligned with the groove 14, the clamping rod 11 is reset and clamped into the clamping groove 13 under the action of the spring 20, so that the fixing seat 8 and the agitator 9 are fixed in the mounting groove 7, the agitator 9 is started, the coil is electrified, the vibration frequency of the agitator 9 reaches the first-order natural frequency, the vibration form of the supporting rod 4 is close to the first-order main vibration form, so that the iron sand powder form is observed, then the pull rod 11 is pulled by the pull rod, the clamping rod 11 is driven by the pull rod, at the moment, the shaker 9 can be disassembled, then the shaker 9 is installed on the other installation seat 6 according to the installation steps, the shaker 9 is started, the coil is electrified, the vibration frequency of the shaker 9 reaches the second-order natural frequency, the vibration form of the support rod 4 is close to the second-order main vibration mode, the iron sand powder form is observed, the shaker 9 is installed on the two installation seats 6 simultaneously, the frequencies of the two shaker 9 are adjusted to the first-order natural frequency and the second-order natural frequency respectively, the coil is electrified, the iron sand powder form is observed, meanwhile, the phenomenon of observation of the three experiments can be conveniently understood by students in the mode body superposition.

In this embodiment, a cavity is formed on the display rod 5, iron sand powder is disposed in the cavity, the display rod 5 is made of transparent material, a coil is wound around the center position of the support rod 4, a positioning groove is formed on the inner wall of one side of the two mounting grooves 7 close to each other, a positioning block is fixedly mounted on one side of the two fixing seats 8 close to each other, the positioning block is slidably connected with the positioning groove, a ball is nested at one end of the clamping rod 11 located in the clamping groove 13, the ball is matched with the wedge-shaped groove 12, a limiting groove is formed on the inner wall of one side of the through hole 10 close to the support rod 4, a limiting block is fixedly mounted at one side of the clamping rod 11 close to the support rod 4, the limiting block is slidably connected with the limiting groove, one end of the push rod 16 far away from the fixing block 15 is rotatably mounted on the slide seat 19, a, one end of each clamping rod 11, which is far away from each other, is vertically and fixedly provided with a pull rod, an anti-slip sleeve is fixedly sleeved on each pull rod, a box body 1, a box cover 2, a supporting seat 3, a supporting rod 4, a display rod 5, a mounting seat 6, a mounting groove 7, a fixing seat 8, a shaker 9, a through hole 10, a clamping rod 11, a wedge-shaped groove 12, a clamping groove 13, a groove 14, a fixing block 15, a push rod 16, a supporting block 17, a sliding rod 18, a sliding seat 19 and a spring 20 are matched, the shaker 9 is mounted on one mounting seat 6 on the supporting rod 4, namely the shaker 9 and the fixing seat 8 are clamped into the mounting groove 7, a positioning block is clamped into the positioning groove at the moment, the clamping rod 11 and a ball are clamped into the wedge-shaped groove 12, the shaker 9 is pressed, the ball rolls on the inner wall of the wedge-shaped groove 12 and pushes the clamping rod 11, the clamping rod 11 moves to drive the fixing block 15 to, thereby compressing the spring 20, when the through hole 10 is aligned with the groove 14, the clamping rod 11 will reset and clamp into the clamping groove 13 under the action of the spring 20, thereby fixing the fixing seat 8 and the oscillator 9 in the mounting groove 7, then starting the oscillator 9, electrifying the coil, making the vibration frequency of the oscillator 9 reach the first-order natural frequency, making the vibration mode of the supporting rod 4 approach the first-order main oscillation mode, thereby observing the iron sand powder mode, then pulling the clamping rod 11 by using the pull rod, driving the clamping rod 11 by using the pull rod, making the clamping rod 11 move out of the clamping groove 13, at this moment, disassembling the oscillator 9, then mounting the oscillator 9 on another mounting seat 6 according to the mounting steps, starting the oscillator 9, electrifying the coil, making the vibration frequency of the oscillator 9 reach the second-order natural frequency, making the vibration mode of the supporting rod 4 approach the second-order main oscillation mode, thereby observing the iron sand powder mode, the two mounting seats 6 are simultaneously provided with the exciters 9, the frequencies of the two exciters 9 are respectively adjusted to the first-order natural frequency and the second-order natural frequency, the coils are electrified, so that the iron sand powder form is observed, meanwhile, the phenomenon of observation in three experiments can be convenient for students to understand the superposition of the mold bodies.

In the embodiment, vibration is realized by arranging the exciters 9, the support rod 4 is of a rectangular structure, the support rod 4 is made of steel plates through pressing, in practical use, the exciters 9 are firstly installed on one installation seat 6 on the support rod 4, namely, the exciters 9 and the fixed seats 8 are clamped into the installation grooves 7, the positioning blocks are clamped into the positioning grooves, the clamping rods 11 and the balls are clamped into the wedge-shaped grooves 12, the exciters 9 are pressed, the balls roll on the inner walls of the wedge-shaped grooves 12 and push the clamping rods 11, the clamping rods 11 move to drive the fixed blocks 15 to move, the fixed blocks 15 move to push the push rods 16, the push rods 16 push the sliding seats 19 to slide on the sliding rods 18, so as to compress the springs 20, when the through holes 10 are aligned with the grooves 14, the clamping rods 11 reset and are clamped into the clamping grooves 13 under the action of the springs 20, so as to fix the fixed seats 8 and the exciters 9 in the installation grooves 7, and, and the coil is electrified to make the vibration frequency of the oscillator 9 reach the first-order natural frequency and make the vibration form of the support rod 4 approach the first-order main vibration mode, thereby observing the form of the iron sand powder, then the pull rod is used for pulling the clamping rod 11, the pull rod drives the clamping rod 11 to move the clamping rod 11 out of the clamping groove 13, at the moment, the agitator 9 can be disassembled, then, the masker 9 is arranged on the other mounting seat 6 according to the mounting steps, the masker 9 is started, and the coil is electrified to lead the vibration frequency of the oscillator 9 to reach the second-order natural frequency, lead the vibration form of the support rod 4 to be close to the second-order main vibration mode, so as to observe the shape of the iron sand powder, then the two mounting seats 6 are simultaneously provided with the agitators 9, the frequencies of the two agitators 9 are respectively adjusted to the first-order natural frequency and the second-order natural frequency, the coils are electrified, thereby observe the iron sand powder form, the phenomenon can be convenient for the student to the superimposed understanding of die body in above-mentioned cubic experiment observation simultaneously.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. The utility model provides a quick demonstration instrument of vibration experiment, which comprises a box body (1) and is characterized in that, one side of box (1) is equipped with case lid (2), symmetrical fixed mounting has supporting seat (3) on the both sides inner wall of box (1), one side fixed mounting that two supporting seats (3) are close to each other has same bracing piece (4), the both sides of bracing piece (4) are equant interval fixed mounting has a plurality of display rods (5), one side symmetrical fixed mounting of bracing piece (4) has two mount pads (6), one side that mount pad (6) kept away from bracing piece (4) has seted up mounting groove (7), slidable mounting has fixing base (8) in mounting groove (7), the bottom of fixing base (8) contacts with the bottom inner wall of mounting groove (7), the top fixed mounting of fixing base (8) has masher (9), the top of masher (9) extends to outside mounting groove (7), through holes (10) are formed in the sides, far away from each other, of the two mounting grooves (7);

clamping rods (11) are slidably mounted in the through holes (10), two ends of each clamping rod (11) extend out of the through holes (10), wedge-shaped grooves (12) with openings at the bottoms are formed in the sides, far away from each other, of the two fixing seats (8), clamping grooves (13) are formed in the inner walls, close to each other, of the two wedge-shaped grooves (12), one ends, close to each other, of the two clamping rods (11) penetrate through the two wedge-shaped grooves (12) respectively and are slidably mounted in the two clamping grooves (13) respectively, grooves (14) are formed in the inner walls, far away from the supporting rods (4), of the through holes (10), and fixing blocks (15) are fixedly mounted on the sides, far away from the supporting rods (4; one side, far away from the clamping rod (11), of the fixing block (15) extends into the groove (14), the push rod (16) is rotatably installed, the push rod (16) is obliquely arranged, a supporting block (17) is fixedly installed on the inner wall of one side, far away from the installation groove (7), of the groove (14), a sliding rod (18) is fixedly installed on the inner wall of one side, far away from the opening of the groove (14), one end, close to the opening of the groove (14), of the sliding rod (18) is fixedly installed on the supporting block (17), and a sliding seat (19) is slidably sleeved on the sliding;

the display rod (5) is provided with a cavity, iron sand powder is arranged in the cavity, and the display rod (5) is made of transparent materials;

a coil is wound at the central position of the support rod (4);

a positioning groove is formed in the inner wall of one side, close to each other, of each of the two mounting grooves (7), a positioning block is fixedly mounted on one side, close to each other, of each of the two fixing seats (8), and the positioning blocks are connected with the positioning grooves in a sliding mode;

firstly, mounting a shaker on one mounting seat on a support rod, enabling the vibration frequency of the shaker to reach the first-order natural frequency, observing the form of iron sand powder, and then disassembling the shaker;

then installing a shaker on the other mounting seat, enabling the vibration frequency of the shaker to reach a second-order natural frequency, and observing the form of the iron sand powder;

and then, installing agitators on the two installation seats simultaneously, adjusting the frequencies of the two agitators to the first-order natural frequency and the second-order natural frequency respectively, and observing the form of the iron sand powder.

2. The vibration experiment rapid demonstration instrument according to claim 1, wherein a ball is nested at one end of the clamping rod (11) located in the clamping groove (13), and the ball is matched with the wedge-shaped groove (12).

3. The vibration experiment rapid demonstration instrument according to claim 1, wherein a limiting groove is formed in the inner wall of one side of the through hole (10) close to the support rod (4), a limiting block is fixedly mounted on one side of the clamping rod (11) close to the support rod (4), and the limiting block is connected with the limiting groove in a sliding manner.

4. The vibration experiment rapid demonstration instrument according to claim 1, wherein one end of the push rod (16) far away from the fixed block (15) is rotatably mounted on the sliding seat (19), the sliding rod (18) is sleeved with a spring (20) welded on the sliding seat (19), and one end of the spring (20) far away from the sliding seat (19) is welded on the inner wall of the groove (14) far away from the opening of the groove (14).

5. The vibration experiment rapid demonstration instrument according to claim 1, wherein the ends of the two clamping rods (11) far away from each other are vertically and fixedly provided with pull rods, and the pull rods are fixedly sleeved with anti-skid sleeves.