CN213024999U

CN213024999U - Physical lever principle teaching device

Info

Publication number: CN213024999U
Application number: CN202022271251.7U
Authority: CN
Inventors: 李伟; 苏玲
Original assignee: LONGNAN TEACHERS COLLEGE
Current assignee: LONGNAN TEACHERS COLLEGE
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-04-20
Anticipated expiration: 2030-10-13

Abstract

The utility model provides a physical lever principle teaching device. The physical lever principle teaching device comprises: a base; the fixed rod is fixedly arranged at the top of the base; the connecting block is hinged to the top end of the fixing rod; the outer frame is fixedly arranged at the top of the connecting block; the fixing bar is arranged in the outer frame, and two ends of the fixing bar are respectively fixedly arranged on the inner walls of two sides of the outer frame; the two clamping mechanisms are arranged in the outer frame; the fixture includes: fixed block, clamp splice, cassette, carriage release lever, fixture block, fixed plate, limiting plate, sliding block, movable plate and spring, the fixed block slidable mounting be in the frame. The utility model provides a physical lever principle teaching device has vivid image, easy operation's advantage.

Description

Physical lever principle teaching device

Technical Field

The utility model relates to a teaching technical field especially relates to a physics lever principle teaching device.

Background

The physical teaching aims at inheriting physical scientific culture, communicating education theory, physical teaching practice and converging physical teaching experience, and serves the physical teaching quality of the beginners and high schools to the maximum extent. There are various machines around us: the crane for lifting heavy objects, the clock and watch for timing, the bottle opener and the like are simple in some cases and complex in some cases, various physical principle elements are filled in the crane, the clock and watch for timing, particularly the lever principle, the main contents of the physical lever principle teaching in the middle school stage can identify the lever, accurately find the positions of a fulcrum, power, a power arm, resistance and a resistance arm, can obtain the balance condition of the lever through experimental research, and can perform related calculation by utilizing the balance condition.

In the teaching of the physical lever principle in reality, teachers generally use balance and weights to demonstrate, simple balance and weight demonstration can only show the lever principle when the arm of force is unchanged, the change of each arm of force in the lever principle cannot be shown, and learners cannot recognize the positions of changed power, power arms, resistance and resistance arms.

Therefore, there is a need to provide a new teaching device for physical lever principle to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide an vivid, easy operation's physics lever principle teaching device.

In order to solve the technical problem, the utility model provides a physics lever principle teaching device includes: a base; the fixed rod is fixedly arranged at the top of the base; the connecting block is hinged to the top end of the fixing rod; the outer frame is fixedly arranged at the top of the connecting block; the fixing bar is arranged in the outer frame, and two ends of the fixing bar are respectively fixedly arranged on the inner walls of two sides of the outer frame; and the two clamping mechanisms are arranged in the outer frame.

Preferably, the clamping mechanism includes: the clamping device comprises a fixed block, a clamping seat, a moving rod, a clamping block, a fixed plate, a limiting plate, a sliding block, a moving plate and a spring, wherein the fixed block is slidably arranged in the outer frame, a groove is formed in the fixed block, the clamping block is hinged to one side of the fixed block, the clamping seat is fixedly arranged on the inner wall of the bottom of the groove, the moving rod is movably arranged on the clamping block, one end of the moving rod extends into the groove, the clamping block is fixedly arranged on one end of the moving rod in the groove, the fixed plate is rotatably sleeved on the moving rod, the fixed plate is in contact with the outer wall of one side, away from the fixed block, of the clamping block, the limiting plate is rotatably sleeved on the moving rod, the sliding block is slidably sleeved on the sliding block, the moving plate is rotatably arranged on the moving plate, and two ends of the spring are respectively and fixedly arranged on one sides of the limiting plates and the movable plates, which are close to each other.

Preferably, a sliding groove is formed in the inner wall of one side of the outer frame, and one side, far away from the clamping block, of the fixing block extends into the sliding groove and is in sliding connection with the inner walls of the two sides of the sliding groove.

Preferably, the fixing block with the clamp splice one side that is close to each other all seted up the arc wall, the fixed thick stick with two the inner wall homogeneous phase contact of arc wall.

Preferably, a handle is fixedly mounted at one end of the moving rod, which is far away from the fixture block, and the handle is arranged on the outer side of the outer frame.

Preferably, a scale is fixedly mounted on the outer wall of one side of the outer frame, a bubble level meter is fixedly mounted at the top of the outer frame, a hook is fixedly mounted at the bottom of the fixing block, and a weight is arranged on the hook.

Compared with the prior art, the utility model provides a physics lever principle teaching device has following beneficial effect:

the utility model provides a physics lever principle teaching device, through the frame, fixed thick stick, the setting of fixed block and clamp splice, reach the effect of convenient change power arm and resistance arm, through the setting of cassette, carriage release lever, the fixture block, the fixed plate, the limiting plate, the sliding block, movable plate and spring, can be after changing power arm and resistance arm the position of quick fixed couple, through the setting of bubble spirit level and scale, reach and be convenient for observe whether fixed thick stick keeps the horizontality and be convenient for observe the purpose of arm of force length.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of a physical lever principle teaching device provided by the present invention;

FIG. 2 is a side view of the fixing rod, the connecting block, the outer frame, the fixing bar and the clamping mechanism shown in FIG. 1;

FIG. 3 is an enlarged schematic view of portion A shown in FIG. 2;

FIG. 4 is an enlarged schematic view of portion B shown in FIG. 3;

reference numbers in the figures: 1. a base; 2. fixing the rod; 3. connecting blocks; 4. an outer frame; 5. a fixed bar; 6. a fixed block; 7. a clamping block; 8. a card holder; 9. a travel bar; 10. a clamping block; 11. a fixing plate; 12. a limiting plate; 13. a slider; 14. moving the plate; 15. a spring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a physical lever principle teaching device according to the present invention; FIG. 2 is a side view of the fixing rod, the connecting block, the outer frame, the fixing bar and the clamping mechanism shown in FIG. 1; FIG. 3 is an enlarged schematic view of portion A shown in FIG. 2; fig. 4 is an enlarged schematic view of a portion B shown in fig. 3. The physical lever principle teaching device includes: a base 1; the fixed rod 2 is fixedly arranged at the top of the base 1; the connecting block 3 is hinged to the top end of the fixing rod 2; the outer frame 4 is fixedly arranged at the top of the connecting block 3; the fixing bar 5 is arranged in the outer frame 4, and two ends of the fixing bar 5 are respectively fixedly arranged on the inner walls of two sides of the outer frame 4; two fixture, two fixture all sets up in the frame 4.

The fixture includes: the movable clamping device comprises a fixed block 6, a clamping block 7, a clamping seat 8, a movable rod 9, a clamping block 10, a fixed plate 11, a limiting plate 12, a sliding block 13, a movable plate 14 and a spring 15, wherein the fixed block 6 is slidably mounted in the outer frame 4, a groove is formed in the fixed block 6, the clamping block 7 is hinged to one side of the fixed block 6, the clamping seat 8 is fixedly mounted on the inner wall of the bottom of the groove, the movable rod 9 is movably mounted on the clamping block 7, one end of the movable rod 9 extends into the groove, the clamping block 10 is fixedly mounted on one end of the movable rod 9 located in the groove, the fixed plate 11 is rotatably sleeved on the movable rod 9, the fixed plate 11 is in contact with the outer wall of one side of the clamping block 7 far away from the fixed block 6, the limiting plate 12 is rotatably sleeved on the movable rod 9, the sliding block 13 is slidably, the movable plate 14 is rotatably installed on the sliding block 13, the spring 15 is sleeved on the movable rod 9, and two ends of the spring 15 are respectively and fixedly installed on one side of the limiting plate 12 and one side of the movable plate 14, which are close to each other.

A sliding groove is formed in the inner wall of one side of the outer frame 4, and one side, far away from the clamping block 7, of the fixing block 6 extends into the sliding groove and is in sliding connection with the inner walls of the two sides of the sliding groove.

The fixed block 6 with the clamp splice 7 one side that is close to each other all has seted up the arc wall, the fixed thick stick 5 with two the inner wall homogeneous phase contact of arc wall.

A handle is fixedly arranged at one end of the moving rod 9 far away from the fixture block 10, and the handle is arranged on the outer side of the outer frame 4.

The scale ruler is fixedly installed on the outer wall of one side of the outer frame 4, the bubble level meter is fixedly installed at the top of the outer frame 4, the hook is fixedly installed at the bottom of the fixing block 6, and weights are arranged on the hook.

The utility model provides a physical lever principle teaching device's theory of operation as follows: when the teaching device is used, the teaching device is placed on a horizontal experiment table, weights are not placed on two hooks, two clamping mechanisms are respectively and fixedly installed at two ends of a fixed bar 5, whether bubbles in a bubble level meter are in a balance position or not is observed, if the bubbles are not in the balance position, the teaching device is moved until the bubbles in the bubble level meter are in the balance position, in an initial state, a clamping block 10 is fixedly clamped on a clamping seat 8 in a groove, one sides, close to each other, of a fixed plate 11 and a clamping block 7 are mutually abutted, one sides, close to each other, of a movable plate 14 and a fixed block 6 are mutually abutted, a spring 15 is in a compression state, the fixed block 6 and the clamping block 7 are clamped on the fixed bar 5, a physical lever principle experiment is started, a handle is turned by ninety degrees, the movable rod 9 rotates to drive the clamping block 10 to rotate by ninety degrees, the clamping block 10 is popped out from the clamping seat 8, the spring 15, according to the lever principle formula: the power multiplied by the power arm is a resistance multiplied by the resistance arm, the hook is moved to a position required by an experiment, after the hook is moved to the required position, the handle is twisted by ninety degrees again, the clamping block 10 is pushed into the groove and clamped with the clamping seat 8 through the moving rod 9, in the process, one side of the fixed block 6 close to the clamping block 7 extrudes the moving plate 14, the moving plate 14 moves towards the direction close to the limiting plate 12 along with the sliding block 13, the spring 15 is in a compression state, the fixed block 6 and the clamping block 7 are clamped on the fixed bar 5, required weights are placed on the two hooks, whether bubbles in the bubble level meter are in a balance position or not is observed, if the bubbles are in the balance position, the weight of the weights and the arm distance on the scale scales on the two sides of the fixed bar 2 are recorded, if the bubbles are not in the balance position, the position of the hook is adjusted again through, and recording test data and checking test results.

the utility model provides a physics lever principle teaching device, through frame 4, fixed thick stick 5, the setting of fixed block 6 and clamp splice 7, reach the effect of convenient change power arm and resistance arm, through cassette 8, carriage release lever 9, fixture block 10, fixed plate 11, limiting plate 12, sliding block 13, the setting of movable plate 14 and spring 15, can be after changing power arm and resistance arm the position of quick fixed couple, through the setting of bubble spirit level and scale, reach and be convenient for observe whether fixed thick stick 5 keeps the horizontality and be convenient for observe the purpose of arm of force length.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A physical lever principle teaching device, comprising:

a base;

the fixed rod is fixedly arranged at the top of the base;

the connecting block is hinged to the top end of the fixing rod;

the outer frame is fixedly arranged at the top of the connecting block;

the fixing bar is arranged in the outer frame, and two ends of the fixing bar are respectively fixedly arranged on the inner walls of two sides of the outer frame;

and the two clamping mechanisms are arranged in the outer frame.

2. The physical leverage principle teaching device of claim 1 wherein the clamping mechanism comprises: the clamping device comprises a fixed block, a clamping seat, a moving rod, a clamping block, a fixed plate, a limiting plate, a sliding block, a moving plate and a spring, wherein the fixed block is slidably arranged in the outer frame, a groove is formed in the fixed block, the clamping block is hinged to one side of the fixed block, the clamping seat is fixedly arranged on the inner wall of the bottom of the groove, the moving rod is movably arranged on the clamping block, one end of the moving rod extends into the groove, the clamping block is fixedly arranged on one end of the moving rod in the groove, the fixed plate is rotatably sleeved on the moving rod, the fixed plate is in contact with the outer wall of one side, away from the fixed block, of the clamping block, the limiting plate is rotatably sleeved on the moving rod, the sliding block is slidably sleeved on the sliding block, the moving plate is rotatably arranged on the moving plate, and two ends of the spring are respectively and fixedly arranged on one sides of the limiting plates and the movable plates, which are close to each other.

3. The physical lever principle teaching device according to claim 2, wherein a sliding groove is formed in an inner wall of one side of the outer frame, and one side of the fixing block, which is far away from the clamping block, extends into the sliding groove and is in sliding connection with inner walls of two sides of the sliding groove.

4. The physical lever principle teaching device according to claim 2, wherein the fixing block and the clamping block are provided with arc-shaped grooves on the sides close to each other, and the fixing bar is in contact with the inner walls of the two arc-shaped grooves.

5. The physical lever principle teaching device according to claim 2, wherein a handle is fixedly mounted at one end of the moving rod away from the fixture block, and the handle is arranged at the outer side of the outer frame.

6. The physical lever principle teaching device according to claim 2, wherein a graduated scale is fixedly mounted on an outer wall of one side of the outer frame, a bubble level gauge is fixedly mounted on the top of the outer frame, a hook is fixedly mounted on the bottom of the fixed block, and a weight is arranged on the hook.