CN112634736A - Practical demonstration teaching aid for mechanical principle classroom teaching - Google Patents

Practical demonstration teaching aid for mechanical principle classroom teaching Download PDF

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Publication number
CN112634736A
CN112634736A CN202110071421.3A CN202110071421A CN112634736A CN 112634736 A CN112634736 A CN 112634736A CN 202110071421 A CN202110071421 A CN 202110071421A CN 112634736 A CN112634736 A CN 112634736A
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China
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fixedly connected
cylindrical gear
drawing board
fixing rod
plate
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CN202110071421.3A
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CN112634736B (en
Inventor
胡瑞
许春霞
陈威
张涵
熊震
熊吉
熊乐
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Nanchang Institute of Technology
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Nanchang Institute of Technology
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
    • G09B25/02Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Instructional Devices (AREA)
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Abstract

The invention discloses a practical demonstration teaching aid for mechanical principle classroom teaching, which comprises a base and a vertical plate, wherein the bottom of the vertical plate is fixedly connected with the top of the base, a first drawing board and a second drawing board are fixedly connected onto the vertical plate, the top of the base is fixedly connected with a limiting frame, a miniature water pump is installed inside the limiting frame, a water pumping pipe is fixedly connected onto the miniature water pump, a first fixing rod and a second fixing rod are installed on the vertical plate, the first fixing rod penetrates through the first drawing board and is fixedly connected with the vertical plate, the second fixing rod penetrates through the second drawing board and is fixedly connected with the vertical plate, and a first cylindrical gear and a first limiting plate are rotatably sleeved on the first fixing rod. According to the invention, the second cylindrical gear is driven to rotate by water, the rotating direction of the second cylindrical gear can be clearly shown, and the defects that the rotating direction of the gear cannot be clearly shown and the rotating speed quantification is lack of intuition in the using process of the traditional gear meshing teaching aid due to the fact that one gear is manually rotated are overcome.

Description

Practical demonstration teaching aid for mechanical principle classroom teaching
Technical Field
The invention relates to the technical field of teaching aids, in particular to a practical demonstration teaching aid for classroom teaching of mechanical principles.
Background
The mechanical principle is to studyMechanismAndmachine with a rotatable shaftThe main components of the discipline of (1) areMechanics studyAndmechanical dynamicsGeneral handleMechanismAndmachine with a rotatable shaftThe teaching aid is a short for teaching aid, can improve the learning interest of students, enrich perceptual knowledge, help to form clear concepts and develop the observation ability and thinking ability of students.
In-process at the mechanical principles teaching, often can use the operation process of some teaching aid demonstration principles, present demonstration to gear engagement principle, the demonstration teaching aid that uses is exactly two simple gears, when manual rotating gear comes demonstration gear engagement, gear revolve's state, but, at the in-process of practical demonstration, two simple gears are in the demonstration, often the running state when unable vivid demonstration gear engagement, and simultaneously, the gear to two different diameters can change slew velocity, can not specifically vivid show out, demonstration effect to gear engagement state is low, can not reach the demonstration effect of demonstration teaching aid, for this reason, the practical demonstration teaching aid that is used for mechanical principles classroom teaching has been proposed.
Disclosure of Invention
The invention aims to solve the defect that the mechanical principle demonstration teaching aid in the prior art is low in demonstration effect, and provides a practical demonstration teaching aid for classroom teaching of mechanical principles.
In order to achieve the purpose, the invention adopts the following technical scheme:
a practical demonstration teaching aid for mechanical principle classroom teaching comprises a base and a vertical plate, wherein the bottom of the vertical plate is fixedly connected with the top of the base, a first drawing board and a second drawing board are fixedly connected onto the vertical plate, a limiting frame is fixedly connected onto the top of the base, a miniature water pump is installed inside the limiting frame, a water pumping pipe is fixedly connected onto the miniature water pump, a first fixing rod and a second fixing rod are installed on the vertical plate, the first fixing rod penetrates through the first drawing board and is fixedly connected with the vertical plate, the second fixing rod penetrates through the second drawing board and is fixedly connected with the vertical plate, a first cylindrical gear and a first limiting plate are rotatably sleeved on the first fixing rod, the first limiting plate is fixedly connected with the first cylindrical gear, a second cylindrical gear and a second limiting plate are fixedly connected onto the second fixing rod, and the second cylindrical gear is fixedly connected with the second limiting plate, the utility model discloses a drawing board, including first drawing board, second dead lever, fixed frame, fixed plate and threaded rod, the inside rotation of second dead lever is connected with the threaded rod, second limiting plate and threaded rod meshing, the fixed frame of fixedly connected with on the second dead lever, the inside sliding connection of fixed frame has the fixed plate, the fixed plate is connected with the threaded rod meshing, the tip of fixed plate is the arc design, the inside sliding connection of first limiting plate has first magnetism pen, the inside fixedly connected with second magnetism pen of second limiting plate, be equipped with pushing mechanism on the first drawing board.
Preferably, pushing mechanism includes a plurality of first stoppers and the second stopper that sets up on the first drawing board, be equipped with the pit on the first stopper, be equipped with the bump on the second stopper, the inside sliding connection of first limiting plate has a plurality of slide bars, the slide bar passes through reset spring and first limiting plate fixed connection, reset spring's one end rotation is kept away from to the slide bar is connected with the dog, the internally mounted of dog has the permanent magnet.
Preferably, the first fixing rod is rotatably connected with a baffle plate, the first limiting plate is fixedly connected with a plurality of push rods, the baffle plate is internally and fixedly connected with an arc-shaped block in a groove, and the push rods are in contact with the arc-shaped block in the rotating process of the first limiting plate.
Preferably, the first cylindrical gear is meshed with the second cylindrical gear.
Preferably, be equipped with water inlet and delivery port on the spacing frame, wherein one end of drinking-water pipe is located the inside surface of water below the spacing frame, the other end of drinking-water pipe is directly over the delivery port.
Preferably, a tip end of the first magnetic pen contacts the first drawing board, and a tip end of the second magnetic pen contacts the second drawing board.
Preferably, the water outlet is located right above a critical point of the second cylindrical gear, the second cylindrical gear is located right above the water inlet, and the water outlet is located right above the water inlet.
Preferably, the second magnetic pen is in contact with the fixing plate in the process of rotation of the second limiting plate, and the magnetic properties of the ends, close to each other, of the corresponding permanent magnets are the same.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, the water flow is used for driving the second cylindrical gear to rotate, the rotating direction of the second cylindrical gear can be clearly shown, the defect that the rotating speed quantification is lack of intuition is overcome, the defect that the rotating direction of the gear cannot be clearly shown when one gear is manually rotated in the using process of the traditional gear meshing teaching aid is overcome, meanwhile, through the design of the baffle and the push rod, the push rod can be further driven to push the baffle when the second cylindrical gear drives the first cylindrical gear to rotate, thereby driving the baffle to rotate, and displaying the rotating direction of the first cylindrical gear through the rotating direction of the baffle, thereby the rotation direction when demonstration two gear engagement operation that can understand, the state of the operation of visual demonstration theory of mechanics sets up the arc piece in the inside of baffle, can be convenient for promote the promotion of pole to the baffle.
2. Through the setting of first magnetism pen and first drawing board, in second roller gear rotation round, observe the number of turns that first magnetism pen was drawn on first drawing board, thereby can demonstrate the principle that different diameter gears can change slew rate, through setting up the concave point on the first stopper, set up the bump on the second stopper, can control first magnetism pen and change the position after the round, thereby first roller gear pivoted number of turns, can be through the number of turns that first magnetism pen was drawn on first drawing board, the show relation between the slew rate that comes to clear, through the position that changes first magnetism pen, can avoid the circle that magnetism pen was drawn overlapping together, thereby can further promote the demonstration effect of mechanical principle demonstration teaching aid.
3. Through the setting of permanent magnet position, can guarantee the stability of first magnetism pen when first magnetism pen shift position to guarantee the stability of first magnetism pen mark, promote the stability in the whole theory of mechanics demonstration teaching aid demonstration process.
4. Whole process utilizes a drive power can drive the work of whole demonstration teaching aid, has certain economic nature, through the demonstration of demonstration teaching aid, can further promote the demonstration effect of theory of machinary to can promote the student to the understanding of theory of machinary operation process, promote student's learning efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a practical demonstration teaching aid for mechanical principle class teaching according to the present invention;
FIG. 2 is a left side view of the first cylindrical gear and the second cylindrical gear of FIG. 1;
FIG. 3 is a right side view of the first retainer plate of FIG. 1;
FIG. 4 is an enlarged view taken at A in FIG. 1;
FIG. 5 is an enlarged view at B of FIG. 1;
FIG. 6 is an enlarged view at C of FIG. 3;
FIG. 7 is a right side view of the first palette of FIG. 5;
FIG. 8 is a schematic view of the arcuate block of FIG. 1;
fig. 9 is a schematic structural view of the fixing plate in fig. 1.
In the figure: the drawing board comprises a base, a vertical plate, a first fixing rod, a second fixing rod, a first cylindrical gear, a second cylindrical gear, a limiting frame, a limiting plate 8, a first limiting plate 9, a baffle plate 10, a pushing rod 11, a first drawing board 12, a second limiting plate 13, a second drawing board 14, a first magnetic pen 15, a miniature water pump 16, a water outlet 17, a water pumping pipe 18, a first limiting block 18, a second limiting block 19, a concave point 20, a salient point 21, an arc-shaped block 22, a fixing frame 23, a threaded rod 24, a fixing plate 25, a second magnetic pen 26, a sliding rod 27, a stopper 28 and a permanent magnet 29.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-9, a practical demonstration teaching aid for mechanical principle classroom teaching comprises a base 1 and a vertical plate 2, wherein the base 1 can ensure the stability of a first cylindrical gear 5 and a second cylindrical gear 6 in the meshing process, the bottom of the vertical plate 2 is fixedly connected with the top of the base 1, the vertical plate 2 is fixedly connected with a first drawing board 11 and a second drawing board 13, magnetic powder is filled in the first drawing board 11 and the second drawing board 13, traces can be left on the corresponding first drawing board 11 and the second drawing board 13 through a first magnetic pen 14 and a second magnetic pen 26, the top of the base 1 is fixedly connected with a limiting frame 7, a miniature water suction pump 15 is installed in the limiting frame 7, the miniature water suction pump 15 can realize the recycling of water, so that water resources are effectively saved, a water suction pipe 17 is fixedly connected on the miniature water suction pump 15, a first fixing rod 3 and a second fixing rod 4 are installed on the vertical plate 2, a first fixing rod 3 penetrates through a first drawing board 11 and is fixedly connected with a vertical board 2, a second fixing rod 4 penetrates through a second drawing board 13 and is fixedly connected with the vertical board 2, a first cylindrical gear 5 and a first limiting plate 8 are rotatably sleeved on the first fixing rod 3, the first limiting plate 8 is fixedly connected with the first cylindrical gear 5, a second cylindrical gear 6 and a second limiting plate 12 are fixedly connected on the second fixing rod 4, the second cylindrical gear 6 is fixedly connected with the second limiting plate 12, a threaded rod 24 is rotatably connected inside the second fixing rod 4, the second limiting plate 12 is meshed with the threaded rod 24, a fixing frame 23 is fixedly connected on the second fixing rod 4, a fixing plate 25 is slidably connected inside the fixing frame 23, the fixing plate 25 is meshed with the threaded rod 24, the end part of the fixing plate 25 is in an arc design, a first magnetic pen 14 is slidably connected inside the first limiting plate 8, and a second magnetic pen 26 is fixedly connected inside the second limiting plate 12, first cylindrical gear 5 and the meshing of second cylindrical gear 6 drive second cylindrical gear 6 through utilizing rivers and rotate, can clearly show second cylindrical gear 6 round pivoted direction, have solved traditional gear engagement teaching aid use, and one of them gear of manual rotation, the drawback that can not clearly show the gear rotation direction needs to explain, and the diameter of second cylindrical gear 6 is greater than first cylindrical gear 5's diameter.
The first drawing board 11 is provided with a pushing mechanism, the pushing mechanism comprises a plurality of first limiting blocks 18 and second limiting blocks 19 which are arranged on the first drawing board 11, concave points 20 are arranged on the first limiting blocks 18, convex points 21 are arranged on the second limiting blocks 19, a plurality of sliding rods 27 are slidably connected inside the first limiting plates 8, the sliding rods 27 are fixedly connected with the first limiting plates 8 through reset springs, one ends, far away from the reset springs, of the sliding rods 27 are rotatably connected with stop blocks 28, permanent magnets 29 are installed inside the stop blocks 28, the second magnetic pens 26 are in contact with fixed plates 25 in the rotating process of the second limiting plates 12, the magnetic properties of the ends, close to each other, of the corresponding permanent magnets 29 are the same, and through the arrangement of the positions of the permanent magnets 29, the stability of the first magnetic pens 14 can be ensured when the first magnetic pens 14 move, so that the stability of the marks of the first magnetic pens 14 is ensured, and the stability, a water inlet and a water outlet 16 are arranged on the limiting frame 7, one end of a water pumping pipe 17 is positioned below the water surface in the limiting frame 7, the other end of the water pumping pipe 17 is positioned right above the water outlet 16, the water outlet 16 is positioned right above the critical point of the second cylindrical gear 6, the water outlet 16 is positioned right above the water inlet, the second cylindrical gear 6 is positioned right above the water inlet, through the arrangement of the first magnetic pen 14 and the first drawing board 11, when the second cylindrical gear 6 rotates for one circle, the number of circles drawn on the first drawing board 11 by the first magnetic pen 14 is observed, so that the principle that gears with different diameters can change the rotation speed can be demonstrated, through the arrangement of the concave point 20 on the first limiting block 18 and the arrangement of the convex point 21 on the second limiting block 19, the position can be changed after the first magnetic pen 14 rotates for one circle, so that the number of circles rotated by the first cylindrical gear 5 can be drawn on the first drawing board 11 by the first magnetic, come clear show slew rate between the relation, through the position that changes first magnetic pen 14, can avoid the circle that first magnetic pen 14 was drawn to overlap together to can further promote the demonstration effect of theory of mechanics demonstration teaching aid.
The baffle 9 is rotatably connected to the first fixing rod 3, the plurality of push rods 10 are fixedly connected to the first limiting plate 8, the arc block 22 is fixedly connected to the inside of the groove of the baffle 9, the plurality of push rods 10 are in contact with the arc block 22 in the rotating process of the first limiting plate 8, the tip of the first magnetic pen 14 is in contact with the first drawing board 11, the tip of the second magnetic pen 26 is in contact with the second drawing board 13, and through the design of the baffle, the baffle 9 and the push rods 10, when the second cylindrical gear 6 drives the first cylindrical gear 5 to rotate, the push rods 10 are further driven to push the baffle 9, so as to drive the baffle 9 to rotate, so that the rotating direction of the first cylindrical gear 5 can be displayed through the rotating direction of the baffle 9, so that the rotating direction of the two gears during meshing operation can be clearly demonstrated, the state of mechanical principle operation can be vividly demonstrated, the arc block 22 is arranged inside the baffle, the pushing of the shutter 9 by the push lever 10 can be further facilitated.
The invention can be illustrated by the following operating modes:
firstly, water is added into the limiting frame 7 through the water inlet, the micro water pump 15 starts to work by pressing down a switch of the micro water pump 15, water at the bottom of the limiting frame 7 is pumped into the position right above the water outlet 16 through the water pumping pipe 17, flows out through the water outlet 16 positioned right above the critical point of the second cylindrical gear 6, and drives the second cylindrical gear 6 to rotate by flushing the critical point of the second cylindrical gear 6, and as the second cylindrical gear 6 is meshed with the first cylindrical gear 5, the rotation of the second cylindrical gear 6 can drive the first cylindrical gear 5 to rotate, at the moment, water flowing out of the water outlet 16 enters the limiting frame 7 through the water inlet of the limiting frame 7, and it needs to be noted that the water level of the added water is lower than the water inlet.
Because the first cylindrical gear 5 is rotatably sleeved on the first fixing rod 3, and the first cylindrical gear 5 is fixedly connected with the first limiting plate 8, the rotation of the first cylindrical gear 5 can drive the rotation of the first limiting plate 8, and similarly, the second cylindrical gear 6 is fixedly connected with the second limiting plate 12, and the second cylindrical gear 6 is rotatably connected with the second fixing rod 4, so that the second limiting plate 12 can be driven to rotate when the second cylindrical gear 6 rotates, because the second limiting plate 12 is meshed with the threaded rod 24, and the threaded rod 24 is rotatably connected with the second fixing rod 4, therefore, the rotation of the second limiting plate 12 can further drive the rotation of the threaded rod 24, because the fixing plate 25 is meshed with the threaded rod 24, the rotation of the threaded rod 24 can drive the fixing plate 24 to move upwards, after the second cylindrical gear 6 rotates for one circle, the fixing plate 24 which moves upwards limits the second magnetic pen 26 on the second limiting plate 12, the second cylindrical gear 6 does not rotate any more, and at this time, the second magnetic pen 26 draws just one turn on the second drawing board 13.
When the first cylindrical gear 5 drives the first limiting plate 8 to rotate, the first cylindrical gear 5 drives the first magnetic pen 14 to draw a circle on the first drawing board 11, when the first magnetic pen 14 contacts with the corresponding first limiting plate 8 and the corresponding second limiting plate 19 on the second drawing board 11, the concave point 20 on the first limiting plate 18 and the convex point 21 on the second limiting plate 19 drive the first magnetic pen 14 to move, the first magnetic pen 14 enters between another pair of corresponding limiting blocks 28 through the two corresponding limiting blocks 28, when the first magnetic pen 14 slides on the limiting blocks 28, the limiting blocks 28 are further driven to rotate, the rotated limiting blocks 28 limit the first magnetic pen 14, when the first cylindrical gear 5 continues to rotate, similarly, the first cylindrical gear 5 rotates between the corresponding first limiting block 18 and the second limiting block 19 again, the position of the first magnetic pen 14 is changed until the second cylindrical gear 6 completes a circle, and the first cylindrical gear stops under the action of the fixing plate, first cylindrical gear 5 stops the rotation simultaneously, at first cylindrical gear 5 pivoted in-process, catch bar 10 passes through arc piece 22 and drives baffle 10 and rotate, observe the direction of rotation of baffle, can judge the direction of rotation of first cylindrical gear 5, first cylindrical gear 5 stops the rotation back, observe the vestige that first magnetic pen 14 left on the first drawing board 11, can judge after second cylindrical gear 6 rotates the round, the number of turns of first cylindrical gear 5 pivoted, the demonstration is accomplished, reverse rotation second cylindrical gear 6, the piece of wiping on first drawing board 11 and the second drawing board 13 of pulling, clear away the vestige on first drawing board 11 and the second drawing board 13, resume whole demonstration teaching aid, be convenient for the demonstration once more of mechanical principle demonstration teaching aid.
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 considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (8)

1. A practical demonstration teaching aid for mechanical principle classroom teaching comprises a base (1) and a vertical plate (2) and is characterized in that the bottom of the vertical plate (2) is fixedly connected with the top of the base (1), the vertical plate (2) is fixedly connected with a first drawing board (11) and a second drawing board (13), the top of the base (1) is fixedly connected with a limiting frame (7), a miniature water suction pump (15) is installed inside the limiting frame (7), a water suction pipe (17) is fixedly connected onto the miniature water suction pump (15), a first fixing rod (3) and a second fixing rod (4) are installed on the vertical plate (2), the first fixing rod (3) penetrates through the first drawing board (11) and the vertical plate (2) and is fixedly connected with the second drawing board (13), the first fixing rod (3) is rotatably sleeved with a first cylindrical gear (5) and a first limiting plate (8), the first limiting plate (8) is fixedly connected with the first cylindrical gear (5), the second fixing rod (4) is fixedly connected with the second cylindrical gear (6) and the second limiting plate (12), the second cylindrical gear (6) is fixedly connected with the second limiting plate (12), the second fixing rod (4) is rotatably connected with a threaded rod (24), the second limiting plate (12) is meshed with the threaded rod (24), the second fixing rod (4) is fixedly connected with a fixing frame (23), the fixing frame (23) is slidably connected with a fixing plate (25), the fixing plate (25) is meshed with the threaded rod (24), the end part of the fixing plate (25) is in an arc design, the first limiting plate (8) is slidably connected with the first magnetic pen (14), and the second limiting plate (12) is fixedly connected with the second magnetic pen (26), and a pushing mechanism is arranged on the first drawing board (11).
2. The practical demonstration teaching aid for mechanical principles classroom teaching of claim 1, wherein the pushing mechanism comprises a plurality of first limit blocks (18) and second limit blocks (19) arranged on a first drawing board (11), concave points (20) are arranged on the first limit blocks (18), convex points (21) are arranged on the second limit blocks (19), a plurality of slide bars (27) are slidably connected inside the first limit plates (8), the slide bars (27) are fixedly connected with the first limit plates (8) through reset springs, one ends of the slide bars (27), which are far away from the reset springs, are rotatably connected with check blocks (28), and permanent magnets (29) are arranged inside the check blocks (28).
3. A practical demonstration teaching aid for mechanical principle classroom teaching according to claim 1, wherein the first fixing rod (3) is rotatably connected with a baffle (9), the first limiting plate (8) is fixedly connected with a plurality of push rods (10), the baffle (9) is internally and fixedly connected with an arc-shaped block (22) in a groove, and the push rods (10) are in contact with the arc-shaped block (22) in the rotating process of the first limiting plate (8).
4. A practical demonstration teaching aid for mechanical principles classroom teaching according to claim 1 wherein the first cylindrical gear (5) is meshed with the second cylindrical gear (6).
5. A practical demonstration teaching aid for mechanical principle classroom teaching according to claim 1, characterized in that a water inlet and a water outlet (16) are arranged on the limiting frame (7), one end of the water pumping pipe (17) is located under the water surface inside the limiting frame (7), and the other end of the water pumping pipe (17) is directly above the water outlet (16).
6. A practical demonstration teaching aid for mechanistic classroom teaching according to claim 1 wherein the tip of the first magnetic pen (14) is in contact with the first sketchpad (11) and the tip of the second magnetic pen (26) is in contact with the second sketchpad (13).
7. A practical demonstration teaching aid for mechanical principles classroom teaching according to claim 5 wherein the water outlet (16) is located directly above the second cylindrical gear (6) critical point, the second cylindrical gear (6) is located directly above the water inlet, and the water outlet (16) is located directly above the water inlet.
8. A practical demonstration teaching aid for mechanical principles classroom teaching according to claim 2 wherein the second magnetic pen (26) contacts the fixed plate (25) during rotation of the second limiting plate (12) and the corresponding permanent magnets (29) are of the same magnetic polarity at the ends that are adjacent to each other.
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