Teaching demonstration mold

Abstract

The utility model relates to the technical field of teaching demonstration dies, and discloses a teaching demonstration die, one side of a connecting rod far away from a second sliding block is fixedly connected with a threaded block, the middle part of the threaded block is in threaded connection with a screw rod, the lower surface of a second connecting plate is fixedly connected with a limiting plate, one side of the screw rod is fixedly connected with a knob, and the knob is fixedly connected with a handle. The side, away from the rotary knob, of the lead screw is fixedly connected with a limiting disc, and the side, away from the second connecting plate, of the extending plate is fixedly connected with a second hook. According to the utility model, by rotating the knob, the extension plate moves so as to drive the hook II to move, the hook II drives the small weight to move, and when the connecting plate I and the connecting plate II are horizontal, the knob is stopped rotating, so that the length between the connecting plate II and the extension plate is more convenient to adjust, and the problem that the traditional pull-type adjustment cannot be stable is avoided; the attraction of the lever principle teaching demonstration mold during demonstration is higher, so that the lever principle teaching demonstration mold can reflect the charm of physics more intuitively.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching demonstration molds, in particular to a teaching demonstration mold. Background Art

[0002] The lever principle teaching demonstration mold is mainly based on the lever principle in physics, which is a basic and important concept in physics. The lever principle refers to a hard rod that can rotate around a fixed point (fulcrum) under the action of force. In order to enable students to better understand and master this principle, teachers often use various teaching demonstration molds to assist teaching.

[0003] The prior art has the following deficiencies: the traditional lever principle teaching demonstration mold is too simple and it is not easy to adjust its length, which makes the lever principle teaching demonstration mold less practical and cannot better attract students' attention; the traditional lever principle teaching demonstration mold is not easy to adjust the height, which makes the display effect of the lever principle teaching demonstration mold poor. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a teaching demonstration mold.

[0005] The cam is connected with a toothed plate, and the toothed plate is connected with a toothed plate in a fixed manner so as to prevent the toothed plate from sliding out of the toothed plate from sliding out of the toothed plate.

[0006] As a further description of the above technical solution:

[0007] The screw rod passes through and is rotatably connected to the middle part of the limiting plate. The second slide groove, the second sliding block and the connecting rod are each provided with two groups and are symmetrically arranged.

[0008] As a further description of the above technical solution:

[0009] The limiting plates are provided in two groups and are symmetrically arranged, and the supporting rod is provided with a groove.

[0010] As a further description of the above technical solution:

[0011] A connecting plate 1 is fixedly connected to one side of the connecting column away from the connecting plate 2, and a hook 1 is fixedly connected to one side of the connecting plate 1 away from the connecting column.

[0012] As a further description of the above technical solution:

[0013] Universal wheels are installed on the lower surface of the bottom plate. Four sets of universal wheels are arranged around the lower surface of the bottom plate.

[0014] As a further description of the above technical solution:

[0015] A protective box is fixedly connected to the lower surface of the base plate, a driving motor is fixedly connected inside the protective box, a transmission shaft is fixedly connected to the output end of the driving motor, a limiting block is fixedly connected inside the protective box, a side of the driving motor away from the transmission shaft is fixedly connected to a first bevel gear, and the first bevel gear is meshingly connected to a second bevel gear.

[0016] As a further description of the above technical solution:

[0017] The transmission shaft passes through and is rotatably connected to the middle part of the limit block. The drive motor, the limit block, the transmission shaft, the first bevel gear and the second bevel gear are all arranged in a protective box.

[0018] As a further description of the above technical solution:

[0019] A slide groove is provided in the support block, and a sliding block is slidably connected in the slide groove. One side of the sliding block is fixedly connected to the support rod. One side of the support rod provided in the support block is threadedly connected to a threaded column. One side of the threaded column passes through the bottom plate and the protective box and is fixedly connected to the middle part of the No. 2 bevel gear.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, the extension plate is moved by turning the knob, and then the hook 2 is moved, and the hook 2 moves with the small weight. When the connecting plate 1 and the connecting plate 2 are in the horizontal state, the knob is stopped from being turned, so that the length between the connecting plate 2 and the extension plate is easier to adjust, avoiding the traditional pulling-type adjustment which cannot be stable, making the lever principle teaching mold more attractive during demonstration, so that the lever principle teaching demonstration mold can more intuitively reflect the charm of physics.

[0022] 2. In the utility model, a driving motor is arranged to move the support rod upward, thereby moving the groove, the connecting column, the connecting plate 1, the connecting plate 2, and the extension plate upward to adjust the position, so that the lever principle teaching demonstration mold can be more convenient to adjust the height, avoiding the lever principle teaching mold being inconvenient to adjust the height during the demonstration and affecting the students' viewing effect, and can effectively improve the flexibility of the lever principle teaching demonstration mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional structure diagram of a teaching demonstration mold proposed by the utility model Figure 1 ;

[0024] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3 A three-dimensional structure diagram of a teaching demonstration mold proposed by the utility model Figure 2 ;

[0026] Figure 4 The utility model is a partial cross-sectional structural schematic diagram of a teaching demonstration mold proposed by the utility model.

[0027] Legend:

[0028] 1. Bottom plate; 2. Universal wheel; 3. Support block; 4. Slide groove 1; 5. Sliding block 1; 6. Protective box; 7. Drive motor; 8. Limit block; 9. Transmission shaft; 10. Bevel gear No. 1; 11. Bevel gear No. 2; 12. Threaded column; 13. Support rod; 14. Groove; 15. Connecting column; 16. Connecting plate 1; 17. Hook 1; 18. Connecting plate 2; 19. Extension plate; 20. Hook 2; 21. Slide groove 2; 22. Sliding block 2; 23. Connecting rod; 24. Limit plate; 25. Threaded block; 26. Knob; 27. Screw; 28. Limit disk. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figure 1-Figure 4The utility model provides an embodiment: a teaching demonstration mold, a bottom plate 1, a support block 3 is fixedly connected to the bottom plate 1, a support rod 13 is slidably connected in the support block 3, a connecting column 15 is rotatably connected to the support rod 13, a connecting plate 18 is fixedly connected to one side of the connecting column 15, an extension plate 19 is slidably connected in the connecting plate 18, a sliding groove 21 is arranged on the connecting plate 18, a sliding block 22 is slidably connected in the sliding groove 21, a connecting rod 23 is fixedly connected to the side of the sliding block 22 away from the sliding groove 21, a threaded block 25 is fixedly connected to the side of the connecting rod 23 away from the sliding block 22, and the middle of the threaded block 25 The lower surface of the connecting plate 18 is fixedly connected with a screw rod 27, and the lower surface of the connecting plate 18 is fixedly connected with a limit plate 24. A knob 26 is fixedly connected to one side of the screw rod 27, and a side of the screw rod 27 away from the knob 26 is fixedly connected to a limit plate 28. A hook 20 is fixedly connected to the side of the extension plate 19 away from the connecting plate 18. The screw rod 27 penetrates and is rotatably connected to the middle of the limit plate 24. The slide groove 21, the sliding block 22, and the connecting rod 23 are all provided with two groups and are symmetrically arranged. The limit plate 24 is provided with two groups and are symmetrically arranged. A groove 14 is provided on the support rod 13. The side of the connecting column 15 away from the connecting plate 18 is fixedly connected to the connecting plate 16 , a hook 17 is fixedly connected to the side of the connecting plate 16 away from the connecting column 15. When performing a demonstration, a heavier weight is hung on the hook 17, and a lighter weight is hung on the hook 20. At this time, the weight on the hook 17 will press over the weight on the hook 20 to make the connecting plate 16 rotate along the support rod 13 with the connecting column 15 and then tilt. Turn the knob 26, and the knob 26 rotates along the middle of the limit plate 24 with the screw rod 27. The screw rod 27 rotates to make the threaded block 25 move along the screw rod 27 through the limit of the sliding block 22 and the connecting rod 23. The threaded block 25 moves along the screw rod 27 with the connecting rod 23 and the sliding block 22 Move along the slide groove 21, the sliding block 22 moves and then moves with the extension plate 19 along the connecting plate 2 18, the extension plate 19 moves and then moves with the hook 20, the hook 20 moves with the small weight, when the connecting plate 16 and the connecting plate 2 18 are in the same level, stop turning the knob 26, so that the length between the connecting plate 2 18 and the extension plate 19 is easier to adjust, avoiding the traditional pulling adjustment and instability, making the lever principle teaching mold more attractive during demonstration, can effectively improve the quality of the teaching demonstration, and make the lever principle teaching demonstration mold can more intuitively reflect the charm of physics.

[0031] A universal wheel 2 is installed on the lower surface of the base plate 1. The universal wheel 2 is provided with four groups and arranged around the lower surface of the base plate 1. A protective box 6 is fixedly connected to the lower surface of the base plate 1. A driving motor 7 is fixedly connected to the protective box 6. A transmission shaft 9 is fixedly connected to the output end of the driving motor 7. A limiting block 8 is fixedly connected to the protective box 6. A first bevel gear 10 is fixedly connected to the side of the driving motor 7 away from the transmission shaft 9. The first bevel gear 10 is meshingly connected with a second bevel gear 11. The transmission shaft 9 passes through and is rotatably connected to the middle part of the limiting block 8. The driving motor 7, the limiting block 8, the transmission shaft 9, the first bevel gear 10, and the second bevel gear 11 are all arranged in the protective box 6. A slide groove 4 is provided in the support block 3. A sliding block 5 is slidably connected in the slide groove 4. One side of the sliding block 5 is fixedly connected to the support rod 13. The support rod 13 is arranged in the support block 3 and is threadedly connected to a threaded column 12 on one side. One side of the threaded column 12 passes through the base plate 1 at the protective The box 6 is fixedly connected to the middle part of the second bevel gear 11, and a driving motor 7 is set. The output end of the driving motor 7 rotates to drive the transmission shaft 9, and the transmission shaft 9 drives the first bevel gear 10 to rotate along the middle part of the limit block 8. The first bevel gear 10 rotates to drive the second bevel gear 11. The second bevel gear 11 rotates to rotate the threaded column 12. The threaded column 12 rotates to make the support rod 13 move upward along the threaded column 12 through the limit of the sliding block 5 to adjust the position. The support rod 13 moves upward along the slide groove 4 with the sliding block 5. The support rod 13 moves upward and then moves the groove 14, the connecting column 15, the connecting plate 16, the connecting plate 2 18, and the extension plate 19 to adjust the position, so that the lever principle teaching demonstration mold can be more convenient to adjust the height, avoid the lever principle teaching mold being inconvenient to adjust the height during the demonstration and affecting the students' viewing effect, and can effectively improve the flexibility of the lever principle teaching demonstration mold.

[0032] Working principle: by setting the driving motor 7, the output end of the driving motor 7 rotates to drive the transmission shaft 9, the transmission shaft 9 drives the first bevel gear 10 to rotate along the middle part of the limit block 8, the first bevel gear 10 rotates to drive the second bevel gear 11, the second bevel gear 11 rotates to make the threaded column 12 rotate, the threaded column 12 rotates to make the support rod 13 move upward along the threaded column 12 through the limit of the sliding block 5 to adjust the position, the support rod 13 drives the sliding block 5 to move upward along the slide groove 4, the support rod 13 moves upward and then drives the groove 14, the connecting column 15, the connecting plate 16, the connecting plate 2 18, and the extension plate 19 to move upward to adjust the position, so that the lever principle teaching demonstration mold can be more convenient to adjust the height, avoid the lever principle teaching mold is not convenient to adjust the height during the demonstration and affect the students' viewing effect, can effectively improve the flexibility of the lever principle teaching demonstration mold, when demonstrating, hang the heavier weight on the hook 17, and hang the lighter weight on the hook 2 20, at this time the hook 17 The weight will press over the weight on the hook 20 to make the connecting plate 16 rotate along the support rod 13 with the connecting column 15 and then tilt. Turn the knob 26, and the knob 26 rotates the screw rod 27 along the middle of the limit plate 24. The screw rod 27 rotates to make the threaded block 25 move along the screw rod 27 through the limit of the sliding block 22 and the connecting rod 23. The threaded block 25 moves along the slide groove 21 with the connecting rod 23 and the sliding block 22. The sliding block 22 moves and then moves along the extension plate 19 along the connecting plate 18. The extension plate 19 moves with it, and the extension plate 19 moves with the hook 20, and the hook 20 moves with the small weight. When the connecting plate 16 and the connecting plate 2 are in the horizontal state, the knob 26 is stopped to make the length between the connecting plate 2 18 and the extension plate 19 easier to adjust, avoiding the traditional pulling adjustment which cannot be stable, making the lever principle teaching mold more attractive during demonstration, effectively improving the quality of the teaching demonstration, and making the lever principle teaching demonstration mold more intuitively reflect the charm of physics.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A teaching demonstration mold, comprising a bottom plate (1), characterized in that: The bottom plate (1) is fixedly connected with a support block (3), a support rod (13) is slidably connected in the support block (3), a connection column (15) is rotatably connected to the support rod (13), a connection plate (18) is fixedly connected to one side of the connection column (15), an extension plate (19) is slidably connected in the connection plate (18), a slide groove (21) is arranged on the connection plate (18), a sliding block (22) is slidably connected in the slide groove (21), and a side of the sliding block (22) away from the slide groove (21) is fixedly connected to the extension plate (19). A connecting rod (23) is connected, and a threaded block (25) is fixedly connected to the side of the connecting rod (23) away from the sliding block (22), and a screw rod (27) is threadedly connected to the middle part of the screw block (25). The lower surface of the connecting plate (18) is fixedly connected to a limiting plate (24), and a knob (26) is fixedly connected to one side of the screw rod (27), and a limit plate (28) is fixedly connected to the side of the screw rod (27) away from the knob (26), and a hook (20) is fixedly connected to the side of the extension plate (19) away from the connecting plate (18).

2. A teaching demonstration mold according to claim 1, characterized in that: The screw rod (27) passes through and is rotatably connected to the middle of the limiting plate (24). The second slide groove (21), the second sliding block (22) and the connecting rod (23) are each provided with two groups and are symmetrically arranged.

3. A teaching demonstration mold according to claim 1, characterized in that: The limiting plates (24) are provided in two groups and are symmetrically arranged, and the supporting rod (13) is provided with a groove (14).

4. A teaching demonstration mold according to claim 1, characterized in that: The side of the connecting column (15) away from the connecting plate 2 (18) is fixedly connected to the connecting plate 1 (16), and the side of the connecting plate 1 (16) away from the connecting column (15) is fixedly connected to the hook 1 (17).

5. A teaching demonstration mold according to claim 1, characterized in that: Universal wheels (2) are installed on the lower surface of the base plate (1), and four groups of universal wheels (2) are arranged on the four sides of the lower surface of the base plate (1).

6. A teaching demonstration mold according to claim 1, characterized in that: The lower surface of the base plate (1) is fixedly connected to a protection box (6), a driving motor (7) is fixedly connected inside the protection box (6), an output end of the driving motor (7) is fixedly connected to a transmission shaft (9), a limiting block (8) is fixedly connected inside the protection box (6), a side of the driving motor (7) away from the transmission shaft (9) is fixedly connected to a first bevel gear (10), and the first bevel gear (10) is meshingly connected to a second bevel gear (11).

7. A teaching demonstration mold according to claim 6, characterized in that: The transmission shaft (9) passes through and is rotatably connected to the middle of the limit block (8); the drive motor (7), the limit block (8), the transmission shaft (9), the first bevel gear (10), and the second bevel gear (11) are all arranged in the protection box (6).

8. A teaching demonstration mold according to claim 1, characterized in that: The support block (3) is provided with a slide groove (4), and a slide block (5) is slidably connected in the slide groove (4), one side of the slide block (5) is fixedly connected to a support rod (13), and one side of the support rod (13) provided in the support block (3) is threadedly connected to a threaded column (12), and one side of the threaded column (12) passes through the bottom plate (1) and the protective box (6) and is fixedly connected to the middle of the second bevel gear (11).

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