Magnetic induction line cutting motion device for physical experiment

Abstract

The invention belongs to the technical field of physical experiments, and discloses a magnetic induction line cutting motion device for physical experiments, which comprises a base and two sliding frames symmetrically and fixedly mounted on the base, and a fixing plate is fixedly mounted on one side of one of the sliding frames on the base. The fixing plate is rotatably connected with a rotating disc capable of being driven to rotate, two fixing rods are symmetrically and fixedly mounted on the rotating disc, sliding grooves are formed in the two sliding frames, two mounting plates are slidably connected between the two sliding grooves, and first connecting rods are rotatably connected between the ends of the two mounting plates and the two fixing rods correspondingly; magnets are mounted on the two mounting plates, and a metal bar capable of sliding is further arranged between the two magnets. The magnetic field intensity is adjusted by adjusting the distance between the two magnets, influence factors of induced electromotive force generated when a metal bar cuts a magnetic induction line are learned, and practicability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of physical experiments, and in particular relates to a cutting magnetic induction line motion device for physical experiments. Background Art

[0002] The existing motion devices for cutting magnetic induction lines are all simple hand-held metal rods that move in a U-shaped magnet, and then observe the swing of the pointer of a sensitive ammeter in a closed loop to prove the existence of an induced current in the closed loop, so as to learn that when a metal rod cuts magnetic induction lines, an induced electromotive force will be generated at both ends of the metal rod. This experimental device can only sense the phenomenon of a conductor cutting magnetic induction lines in a closed loop from the surface. It is impossible to understand the influence of various factors on the generated induced electromotive force in the process of learning to cut magnetic induction lines through the existing experimental device, and its practicality is poor. Summary of the invention

[0003] The purpose of the present invention is to provide a cutting magnetic induction line motion device for physical experiments to solve the problem that the existing cutting magnetic induction line motion device for physical experiments cannot study the influence of various factors on the generation of induced electromotive force.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A magnetic induction line cutting motion device for physical experiments comprises a base and two slides symmetrically fixedly mounted on the base, a fixed plate fixedly mounted on the base at one side of one of the slides, a turntable rotatably connected to the fixed plate, two fixed rods symmetrically fixedly mounted on the turntable, a slide groove is provided in each of the two slides, two mounting plates are slidably connected between the two slide grooves, the ends of the two mounting plates are respectively rotatably connected to the two fixing rods with a first connecting rod, magnets are mounted on the two mounting plates, and a slidable metal rod is also provided between the two magnets.

[0006] Preferably, it also includes a sensitive ammeter and a switch arranged on the base, and wires are connected between the two ends of the metal rod and the sensitive ammeter and the switch in sequence.

[0007] Preferably, guide rods are fixedly installed in the two slide grooves, and the two guide rods slide through the two ends of the mounting plate respectively.

[0008] Preferably, two guide rails are provided on both sides of the mounting plate, and slide seats are slidably connected inside the two guide rails. Two elastic clamping plates are symmetrically provided on the two slide seats, and each of the elastic clamping plates is provided with a clamping groove for clamping a metal rod.

[0009] Preferably, a screw rod which is screwed and passes through the sliding seat is rotatably connected in the guide rail.

[0010] Preferably, two rotating seats are fixedly mounted on the base, and the two guide rails are rotatably connected to the two rotating seats respectively.

[0011] Preferably, a dial is fixedly mounted on one side of the rotating seat, a fixed shaft that rotates and passes through the dial is fixedly mounted on one side of the guide rail, the fixed shaft coincides with the axis of the dial, a pointer is fixed at the end of the fixed shaft, and the pointer is located outside the dial.

[0012] Preferably, an electric push rod is fixedly mounted on the base, a slide plate is fixedly connected to the output end of the electric push rod, and a second connecting rod is rotatably connected between the two ends of the slide plate and the bottoms of the two guide rails.

[0013] Preferably, two trapezoidal sliders are symmetrically slidably connected in the mounting plate, a slot for mounting a magnet is provided in the mounting plate, a clamping block for clamping the magnet is slidably connected at one end of the slot in the mounting plate, springs are connected between both ends of the clamping block and the mounting plate, and a V-shaped groove is provided on one side of the clamping block for slidingly matching with the inclined surfaces of the two trapezoidal sliders.

[0014] Preferably, a double-headed screw is rotatably connected inside the mounting plate, and the two trapezoidal sliding blocks are respectively screwed and connected to the two ends of the double-headed screw.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention is provided with a turntable, and the rotation of the turntable drives the two fixed rods to rotate around the axis of the turntable, thereby driving the two mounting plates to slide in the slide groove through the two first connecting rods, and the two mounting plates move away from or close to each other, thereby making the two magnets move away from or close to each other, so as to adjust the magnetic field strength between the two magnets. When the metal rod moves between the two magnets, the offset angle of the scale needle of the sensitive ammeter is observed, so as to study the influence of the magnetic field strength on the induced electromotive force.

[0017] (2) The present invention is provided with a guide rail, a slide and a screw. The metal rod is clamped between two elastic clamping plates on the slide. By driving the screw to rotate at different speeds, the slide moves in the guide rail at different speeds, thereby driving the metal rod to cut the magnetic induction line at different speeds, so as to study the influence of the cutting speed on the induced electromotive force.

[0018] (3) The present invention is provided with a slide plate and a second connecting rod, and the slide plate is pushed to move by an electric push rod, so that the second connecting rod pushes the guide rail to rotate on the rotating seat, so that when the slide seat drives the metal rod to move along the guide rail, there are different angles between the cutting direction of the metal rod and the direction of the magnetic induction line, so as to study the influence of the cutting angle on the induced electromotive force; in addition, the pointer on one side of the guide rail and the dial on the upper end of the rotating seat can directly read the angle size, which is easy to operate.

[0019] (4) The present invention is provided with a clamping block, which can move the two trapezoidal sliders toward both ends by rotating the double-headed screw. The inclined surfaces of the two trapezoidal sliders slide in cooperation with the V-shaped grooves of the clamping block, thereby pushing the clamping block close to the magnet to fix the magnet. At the same time, the springs are compressed at both ends of the clamping block. When disassembling, the double-headed screw is rotated in the opposite direction to make the two trapezoidal sliders close to each other. The clamping block is away from the magnet under the elastic force of the spring, thereby realizing rapid disassembly and installation of the magnet, and facilitating assembly and arrangement of the experimental device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a first stereogram of the present invention;

[0021] Figure 2 is a second stereogram of the present invention;

[0022] Figure 3 is a first cross-sectional view of the present invention;

[0023] Figure 4 is a second cross-sectional view of the present invention;

[0024] Figure 5 It is a cross-sectional view of the assembly of the turntable of the present invention;

[0025] Figure 6 It is a cross-sectional view of the mounting plate assembly of the present invention;

[0026] In the figure: 1-base, 2-fixed plate, 3-first connecting rod, 4-fixed rod, 5-turntable, 6-slide, 7-slide groove, 8-mounting plate, 9-magnet, 10-elastic card plate, 11-slot, 12-metal rod, 13-slide seat, 14-guide rod, 15-sensitive galvanometer, 16-wire, 17-switch, 18-electric push rod, 19-guide rail, 20-dial, 21-pointer, 22-rotating seat, 23-slide plate, 24-second connecting rod, 25-clamping block, 26-double-headed screw, 27-screw, 28-spring, 29-trapezoidal slider. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 6 As shown, the present invention provides the following technical solutions:

[0029] A magnetic induction line cutting motion device for physical experiments, comprising a base 1 and two slides 6 symmetrically fixedly mounted on the base 1, a fixed plate 2 fixedly mounted on one side of one of the slides 6 on the base 1, a turntable 5 rotatably connected to the fixed plate 2, two fixed rods 4 symmetrically fixedly mounted on the turntable 5, a slide slot 7 is provided in each of the two slides 6, two mounting plates 8 are slidably connected between the two slide slots 7, first connecting rods 3 are rotatably connected between the ends of the two mounting plates 8 and the two fixing rods 4, magnets 9 are mounted on each of the two mounting plates 8, and a slidable metal rod 12 is further provided between the two magnets 9;

[0030] It also includes a sensitive ammeter 15 and a switch 17 disposed on the base 1, and wires 16 are connected between the two ends of the metal rod 12 and the sensitive ammeter 15 and the switch 17 in sequence;

[0031] Guide rods 14 are fixedly installed in the two slide grooves 7 , and the two guide rods 14 slide through the two ends of the mounting plate 8 respectively.

[0032] Based on the above disclosed structure, when doing the experiment of cutting magnetic induction line movement:

[0033] First, install two magnets 9 on two mounting plates 8 respectively, then pass the metal rod 12 between the two magnets 9, and use multiple wires 16 to connect the sensitive ammeter 15 and the switch 17 in sequence between the two ends of the metal rod 12, move the metal rod 12 to one end of the two magnets 9, close the switch 17 to put the metal rod 12 in a closed loop, and then move the metal rod 12 between the two magnets 9, and observe the displacement of the scale needle of the sensitive ammeter 15, so as to prove that the movement of the metal rod 12 cutting the magnetic induction line will generate induced current, that is, induced electromotive force will be generated at both ends of the metal rod 12.

[0034] In addition, when other conditions such as the cutting direction and speed of the metal rod 12 remain unchanged, the distance between the two magnets 9 is adjusted to change the magnetic field strength between the two magnets 9, so as to verify the influence of the magnetic field strength on the induced electromotive force generated by cutting the magnetic induction line. The specific operation is as follows: firstly, the offset angle of the scale needle of the sensitive ammeter 15 is observed through the above operation when the two magnets 9 are at a fixed distance and the metal rod 12 moves, and then the turntable 5 is driven to rotate by the motor, and the two fixing rods 4 on the turntable 5 drive the two mounting plates 8 to slide in the two slide grooves 7 and approach each other through the two first connecting rods 3, thereby guiding The rod 14 makes the movement of the mounting plate 8 more stable, thereby driving the two magnets 9 to move closer to each other, thereby increasing the magnetic field strength between the two magnets 9, and then moving the metal rod 12 to observe the offset angle of the scale needle of the sensitive ammeter 15 at this time; conversely, driving the turntable 5 to rotate in the opposite direction to make the two magnets 9 move away from each other to reduce the magnetic field strength between the two magnets 9, and then moving the metal rod 12 to observe the offset angle of the scale needle of the sensitive ammeter 15 at this time, and comparing the observed offset angle with the initial offset angle, so as to judge and verify the influence of the magnetic field strength on the induced electromotive force generated by cutting the magnetic induction lines.

[0035] As mentioned above, regarding the movement of the metal rod 12, it is preferred to have the following structure:

[0036] Two guide rails 19 are provided on both sides of the mounting plate 8, and a slide seat 13 is slidably connected in the two guide rails 19. Two elastic clamps 10 are symmetrically provided on the two slide seats 13, and each elastic clamp 10 is provided with a clamping groove 11 for clamping a metal rod 12;

[0037] A screw rod 27 which is screwed and penetrates the slide seat 13 is rotatably connected in the guide rail 19 .

[0038] As can be seen from the above, the metal rod 12 is inserted between the two elastic clips 10 on the slide 13, and the two elastic clips 10 are offset to both sides until the metal rod 12 moves into the slot 11. The two elastic clips 10 automatically rebound due to elastic force, thereby achieving rapid clamping of the metal rod 11, facilitating the assembly of the experimental device and ensuring the smooth operation of the metal rod 12. Then, the motor drives the screw rod 27 to rotate, so that the screw-connected slide 13 moves in the guide rail 19, so that the metal rod 12 moves to cut the magnetic induction line.

[0039] In addition, when other conditions such as the magnetic field intensity and the cutting direction of the metal rod 12 remain unchanged, the cutting speed of the metal rod 12 is adjusted to verify the influence of the cutting speed on the induced electromotive force generated by cutting the magnetic induction lines. The specific operation is: first, when the metal rod 12 is cut at a certain speed, the offset angle of the scale needle of the sensitive ammeter 15 is observed, and then the driving power of the driving motor of the screw rod 27 is increased to increase the rotation speed of the screw rod 27, thereby increasing the moving speed of the slide 13 along the guide rail 19, and then increasing the cutting speed of the metal rod 12, and observing the offset angle of the scale needle of the sensitive ammeter 15 at this time; conversely, the driving power of the driving motor of the screw rod 27 is reduced to reduce the cutting speed of the metal rod 12, and observing the offset angle of the scale needle of the sensitive ammeter 15 at this time, and comparing the observed offset angle with the initial offset angle, so as to judge and verify the influence of the cutting magnetic induction line speed on the generation of induced electromotive force.

[0040] In addition, two rotating seats 22 are fixedly installed on the base 1, and the two guide rails 19 are rotatably connected in the two rotating seats 22 respectively; an electric push rod 18 is fixedly installed on the base 1, and a slide plate 23 is fixedly connected to the output end of the electric push rod 18, and the two ends of the slide plate 23 are rotatably connected to the bottom of the two guide rails 19 respectively with a second connecting rod 24. Based on this, when other conditions such as the magnetic field strength and the cutting speed of the metal rod 12 remain unchanged, the cutting direction of the metal rod 12 is adjusted to verify the influence of the cutting direction on the induced electromotive force generated by cutting the magnetic induction lines. The specific operation is: first, when the metal rod 12 is horizontally cutting the magnetic induction lines, the offset angle of the scale needle of the sensitive ammeter 15 is observed, and then the electric push rod 18 is started to push out the telescopic end to push the slide plate 23 to move, so that the second connecting rod 24 pushes one end of the guide rail 19 to rise, so that the guide rail 19 rotates on the rotating seat 22, so that the metal rod 12 moves to cut the magnetic induction lines, and the offset angle of the scale needle of the sensitive ammeter 15 is observed at this time, and then the electric push rod 18 is continued to be pushed out of the telescopic end to increase the offset angle of the guide rail 19, and then the metal rod 12 is moved to cut the magnetic induction lines, and the offset angle of the scale needle of the sensitive ammeter 15 is observed at this time, and the observed offset angle is compared with the initial offset angle, so as to judge and verify the influence of the direction of cutting the magnetic induction lines on the generation of induced electromotive force.

[0041] Preferably, a dial 20 is fixedly mounted on one side of the rotating seat 22, and a fixed shaft that rotates and penetrates the dial 20 is fixedly mounted on one side of the guide rail 19, the fixed shaft coincides with the axis of the dial 20, a pointer 21 is fixed at the end of the fixed shaft, and the pointer 21 is located outside the dial 20. Based on this, when the guide rail 19 rotates on the rotating seat 22, the guide rail 19 drives the pointer 21 to rotate, and the pointer 21 rotates outside the dial 20 and points to the scale line at the upper end of the dial 20, so that the rotation angle of the guide rail 19 can be directly read, and then the angle at which the metal rod 12 cuts the magnetic induction line can be obtained, which facilitates the measurement of experimental data and improves efficiency.

[0042] In addition, regarding the installation of the magnet, it is preferred to have the following structure:

[0043] Two trapezoidal sliders 29 are symmetrically slidably connected in the mounting plate 8, a card slot for mounting the magnet 9 is provided in the mounting plate 8, a clamping block 25 for pressing the magnet 9 is slidably connected at one end of the card slot in the mounting plate 8, springs 28 are connected between both ends of the clamping block 25 and the mounting plate 8, and a V-shaped groove is provided on one side of the clamping block 25 for slidingly matching with the inclined surfaces of the two trapezoidal sliders 29;

[0044] A double-headed screw rod 26 is rotatably connected inside the mounting plate 8 , and two trapezoidal sliding blocks 29 are screwed and connected to the two ends of the double-headed screw rod 26 .

[0045] As can be seen from the above, the magnet 9 is placed in the slot on the mounting plate 8, and then the double-headed screw 26 is rotated to make the two trapezoidal sliders 29 move away from each other, and the inclined surfaces of the two trapezoidal sliders 29 respectively slide with the two inclined surfaces of the V-shaped groove on one side of the clamping block 25, so that the two trapezoidal sliders 29 push the clamping block 25 to approach and press the magnet 9, and at the same time, the two ends of the clamping block 25 and the mounting plate 8 compress the spring 28, so as to fix the magnet 9 in the slot in the mounting plate 8; when the magnet 9 needs to be removed, the double-headed screw 26 is rotated in the opposite direction to make the two trapezoidal sliders 29 approach each other, and based on the elastic force of the spring 28, the clamping block 25 is moved away from the magnet 9. At this time, the magnet 9 can be directly removed, so as to quickly disassemble and install the experimental magnet 9, which is convenient for the assembly and arrangement of the experimental device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for cutting magnetic induction lines for physical experiments, characterized in that: The invention comprises a base (1) and two slides (6) symmetrically fixedly mounted on the base (1); a fixed plate (2) is fixedly mounted on one side of one of the slides (6) on the base (1); a turntable (5) which can be driven to rotate is rotatably connected to the fixed plate (2); two fixed rods (4) are symmetrically fixedly mounted on the turntable (5); a slide groove (7) is provided in each of the two slides (6); two mounting plates (8) are slidably connected between the two slide grooves (7); ends of the two mounting plates (8) are respectively rotatably connected to the two fixing rods (4) with a first connecting rod (3); magnets (9) are mounted on each of the two mounting plates (8); and a slidable metal rod (12) is further provided between the two magnets (9).

2. The device for cutting magnetic induction lines for physical experiments according to claim 1, characterized in that: It also includes a sensitive ammeter (15) and a switch (17) arranged on the base (1), and wires (16) are connected in sequence between the two ends of the metal rod (12) and the sensitive ammeter (15) and the switch (17).

3. The device for cutting magnetic induction lines for physical experiments according to claim 1, characterized in that: Guide rods (14) are fixedly installed in the two slide grooves (7), and the two guide rods (14) slide through the two ends of the mounting plate (8) respectively.

4. The device for cutting magnetic induction lines for physical experiments according to claim 1, characterized in that: Two guide rails (19) are provided on both sides of the mounting plate (8), and a slide seat (13) is slidably connected inside the two guide rails (19). Two elastic clamping plates (10) are symmetrically provided on the two slide seats (13), and each of the elastic clamping plates (10) is provided with a clamping groove (11) for clamping a metal rod (12).

5. The device for cutting magnetic induction lines for physical experiments according to claim 4, characterized in that: A screw rod (27) which is screwed and penetrates the slide seat (13) is rotatably connected inside the guide rail (19).

6. The device for cutting magnetic induction lines for physical experiments according to claim 4, characterized in that: Two rotating seats (22) are fixedly mounted on the base (1), and the two guide rails (19) are rotatably connected to the two rotating seats (22) respectively.

7. The device for cutting magnetic induction lines for physical experiments according to claim 6, characterized in that: A scale disk (20) is fixedly mounted on one side of the rotating seat (22), and a fixed shaft that rotates and penetrates the scale disk (20) is fixedly mounted on one side of the guide rail (19), the fixed shaft coincides with the axis of the scale disk (20), a pointer (21) is fixed at the end of the fixed shaft, and the pointer (21) is located outside the scale disk (20).

8. The device for cutting magnetic induction lines for physical experiments according to claim 6, characterized in that: An electric push rod (18) is fixedly mounted on the base (1), a slide plate (23) is fixedly connected to the output end of the electric push rod (18), and a second connecting rod (24) is rotatably connected between the two ends of the slide plate (23) and the bottoms of the two guide rails (19).

9. The device for cutting magnetic induction lines for physical experiments according to claim 1, characterized in that: Two trapezoidal sliders (29) are symmetrically slidably connected in the mounting plate (8), a slot for mounting a magnet (9) is provided in the mounting plate (8), a clamping block (25) for clamping the magnet (9) is slidably connected at one end of the slot in the mounting plate (8), springs (28) are connected between the two ends of the clamping block (25) and the mounting plate (8), and a V-shaped groove is provided on one side of the clamping block (25) for slidingly matching with the inclined surfaces of the two trapezoidal sliders (29).

10. The device for cutting magnetic induction lines for physical experiments according to claim 9, characterized in that: A double-headed screw rod (26) is rotatably connected inside the mounting plate (8), and the two trapezoidal sliding blocks (29) are respectively screwed and connected to the two ends of the double-headed screw rod (26).

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