CN213092606U

CN213092606U - Physical lever principle demonstration device

Info

Publication number: CN213092606U
Application number: CN202021523039.9U
Authority: CN
Inventors: 袁铭阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-04-30
Anticipated expiration: 2030-07-28

Abstract

The utility model belongs to the technical field of physical teaching, in particular to a physical lever principle demonstration device, which comprises a dustproof box and a dustproof cover arranged at the top of the dustproof box, wherein a lifting rod is fixedly arranged at the top of the dustproof cover, a bottom plate is movably arranged in the dustproof box, four corners at the bottom of the bottom plate are all matched with and provided with idler wheels, storage boxes are respectively fixed at two sides of the top of the bottom plate, and a box cover is hinged at one side of the top of each storage box; a telescopic column is fixed in the middle of the top of the bottom plate, a lever is hinged to the top of the telescopic column, connecting grooves are formed in two ends of the lever, a screw rod is rotatably mounted on the inner wall of each connecting groove, and a positioning plate is connected to the screw rod in a threaded mode; the utility model discloses rational in infrastructure, design benefit conveniently adjusts the position of locating plate to help the student to understand lever principle, conveniently carry presentation device, be fit for using widely.

Description

Physical lever principle demonstration device

Technical Field

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

Background

The lever is also called a labor-saving lever, a labor-saving lever and an equal-arm lever, and the lever principle is also called a lever balance condition. To balance the lever, the two moments (force multiplied by moment arm) acting on the lever must be equal in magnitude. Namely: the power x power arm is represented by an algebraic expression F1 · L1, F2 · L2. In the formula, F1 represents power, L1 represents a power arm, F2 represents resistance, and L2 represents a resistance arm. From the above formula, to balance the lever, the power arm is several times as much as the resistance arm, and the resistance is several times as much as the power.

In physical teaching, the lever principle presentation device needs to be used, the position of placing the dish is inconvenient to adjust to current presentation device, and the inconvenient mr of current presentation device carries moreover.

In order to solve the problems, the application provides a physical lever principle demonstration device.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

For solving the technical problem who exists among the background art, the utility model provides a physics lever principle presentation device has the convenient characteristics of adjusting and conveniently carrying.

(II) technical scheme

In order to solve the problems, the utility model provides a physical lever principle demonstration device, which comprises a dustproof box and a dustproof cover arranged at the top of the dustproof box, wherein a lifting rod is fixedly arranged at the top of the dustproof cover, a bottom plate is movably arranged in the dustproof box, four corners at the bottom of the bottom plate are respectively provided with a roller in a matching way, storage boxes are respectively fixed at two sides of the top of the bottom plate, and one side of the top of each storage box is hinged with a box cover;

the utility model discloses a telescopic column, including bottom plate, telescopic column, lead screw, locating plate, dwang, locating plate, set of placing, the top intermediate position of bottom plate is fixed with telescopic column, telescopic column's top articulates there is the lever, the both ends of lever all are equipped with the spread groove, rotate on the inner wall of spread groove and install the lead screw, threaded connection has the locating plate on the lead screw, the one end of lead screw is fixed with the dwang, the bottom of locating plate is connected with places the dish, the top fixed mounting of lead screw has the scale, the right-hand member welding of.

Preferably, the lever is made of a solid rod, openings are formed in two sides of the outer wall of each connecting groove, and two ends of the positioning plate extend to the outside of each opening respectively.

Preferably, the bottom welding of locating plate has the installation to detain, and the installation is detained and is tied there is the installation rope, and the lower extreme of installation rope and place a set fixed connection.

Preferably, two the one end that the lead screw was kept away from each other all extends to the outside of spread groove to fixedly connected with dwang.

Preferably, the equal fixed mounting in bottom both sides of shadoof has the inserted block, and the outside both sides of inserted block all are fixed with first block rubber, the top both sides of dust proof box all are equipped with the draw-in groove, and fixed mounting has the second block rubber on the inner wall of draw-in groove, and first block rubber and the setting of mutually supporting of second block rubber.

Preferably, the length of the graduated scale is equal to that of the lever, and the two positioning plates are symmetrically arranged on two sides of the lever.

The above technical scheme of the utility model has following profitable technological effect:

1. the bottom plate is movably placed in the dust-proof box, idler wheels are installed at four corners of the bottom plate in a matched mode, storage boxes are fixed on two sides of the top of the bottom plate, a box cover is hinged to one side of the top of each storage box, inserting blocks are fixedly installed on two sides of the bottom of the lifting rod, first rubber blocks are fixed on two sides of the outer portion of each inserting block, clamping grooves are formed in two sides of the top of the dust-proof box, second rubber blocks are fixedly installed on the inner walls of the clamping grooves, the first rubber blocks and the second rubber blocks are arranged in a matched mode, the dust-proof box can be carried through the lifting rod, the box cover is clamped with the box body, and the box cover and the dust-proof;

2. through threaded connection on the lead screw there is the locating plate, the one end of lead screw is fixed with the dwang, the bottom of locating plate is connected with places the dish, the top fixed mounting of lead screw has the scale, the right-hand member welding of bottom plate has L type pole, the top welding of L type pole has the arm-tie, rotate the dwang, can drive the lead screw and rotate, the lead screw rotates and can drive the locating plate or move right left, thereby conveniently adjust the position of placing the dish, the setting up of scale is convenient to the direct reading in position of locating plate, and is simple and convenient, the utility model discloses rational in infrastructure, design benefit conveniently adjusts the position of locating plate, thereby helps the student to understand lever principle, conveniently carries presentation device.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of the present invention;

fig. 3 is an enlarged schematic structural diagram of the position B in the present invention.

In the figure: 1 dust proof box, 2 shadoods, 3 draw-in grooves, 4 inserted blocks, 5 first rubber blocks, 6 second rubber blocks, 7 bottom plates, 8 gyro wheels, 9 storing boxes, 10L type pole, 11 flexible posts, 12 place dish, 13 scale, 14 lead screws, 15 locating plates, 16 spread grooves, 17 dwangs.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-3, the utility model provides a physical lever principle demonstration device, including dust-proof box 1 and the shield installed at the top of dust-proof box 1, the top of shield is fixedly installed with lifter 2, bottom plate 7 is placed in the interior activity of dust-proof box 1, four corners of the bottom of bottom plate 7 are all fitted with gyro wheel 8, both sides of the top of bottom plate 7 are all fixed with storage box 9, and one side of the top of storage box 9 is hinged with a box cover;

the top intermediate position of bottom plate 7 is fixed with flexible post 11, the top of flexible post 11 articulates there is the lever, the both ends of lever all are equipped with spread groove 16, rotate on spread groove 16's the inner wall and install lead screw 14, threaded connection has locating plate 15 on the lead screw 14, the one end of lead screw 14 is fixed with dwang 17, the bottom of locating plate 15 is connected with places dish 12, the top fixed mounting of lead screw 14 has scale 13, the right-hand member welding of bottom plate 7 has L type pole 10, and the top welding of L type pole 10 has the arm-tie.

The utility model discloses in, the lever adopts solid pole to make, and the outer wall both sides of spread groove 16 all are equipped with the opening, the both ends of locating plate 15 extend to the open-ended outside respectively.

The utility model discloses in, the bottom welding of locating plate 15 has the installation to detain, and the installation is detained and is tied there is the installation rope, and the lower extreme of installation rope and place dish 12 fixed connection.

The utility model discloses in, two the one end that lead screw 14 kept away from each other all extends to the outside of spread groove 16 to fixedly connected with dwang 17 rotates dwang 17, can drive lead screw 14 and rotate, and lead screw 14 rotates and to drive locating plate 15 or move right left, thereby conveniently adjusts the position of placing dish 12, and the convenient direct reading of position to locating plate 15 that sets up of scale 13 is simple and convenient.

The utility model discloses in, the equal fixed mounting in bottom both sides of shadoof 2 has inserted block 4, and the outside both sides of inserted block 4 all are fixed with first block rubber 5, the top both sides of dust proof box 1 all are equipped with draw-in groove 3, and fixed mounting has second block rubber 6 on the inner wall of draw-in groove 3, and first block rubber 5 and second block rubber 6 mutually support the setting.

The utility model discloses in, scale 13's length equals with the length of lever, two locating plate 15 symmetry sets up in the both sides of lever, the utility model discloses rational in infrastructure, design benefit conveniently adjusts the position of locating plate 15 to help the student to understand the lever principle, conveniently carry presentation device, be fit for using widely.

The working principle is as follows: when in use, a bottom plate 7 is movably placed in the dust-proof box 1, rollers 8 are respectively installed at four corners of the bottom plate 7 in a matching manner, storage boxes 9 are respectively fixed at two sides of the top of the bottom plate 7, a box cover is hinged at one side of the top of each storage box 9, insertion blocks 4 are respectively fixedly installed at two sides of the bottom of a lifting rod 2, first rubber blocks 5 are respectively fixed at two sides of the outer part of each insertion block 4, clamping grooves 3 are respectively arranged at two sides of the top of the dust-proof box 1, second rubber blocks 6 are fixedly installed on the inner walls of the clamping grooves 3, the first rubber blocks 5 and the second rubber blocks 6 are mutually matched, the dust-proof box 1 can be carried through the lifting rod 2, the box cover is clamped with the box body, the box cover is conveniently and quickly connected with the dust-proof box 1, a positioning plate 15 is connected to the screw threads of the screw rod 14, a rotating rod 17 is fixed at one end, the top fixed mounting of lead screw 14 has scale 13, the right-hand member welding of bottom plate 7 has L type pole 10, and the top welding of L type pole 10 has the arm-tie, rotates dwang 17, can drive lead screw 14 and rotate, and lead screw 14 rotates and can drive locating plate 15 or move right left to conveniently adjust the position of placing dish 12, scale 13 set up convenient to the direct reading in position of locating plate 15, simple and convenient, the utility model discloses rational in infrastructure, design benefit conveniently adjusts the position of locating plate 15, thereby helps the student to understand lever principle, conveniently carries presentation device, is fit for using widely.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A physical lever principle demonstration device comprises a dust-proof box (1) and a dust cover arranged at the top of the dust-proof box (1), and is characterized in that a lifting rod (2) is fixedly arranged at the top of the dust cover, a bottom plate (7) is movably arranged in the dust-proof box (1), idler wheels (8) are arranged at four corners of the bottom plate (7) in a matched mode, storage boxes (9) are fixed on two sides of the top of the bottom plate (7), and a box cover is hinged to one side of the top of each storage box (9);

the top intermediate position of bottom plate (7) is fixed with flexible post (11), the top of flexible post (11) articulates there is the lever, the both ends of lever all are equipped with spread groove (16), rotate on the inner wall of spread groove (16) and install lead screw (14), threaded connection has locating plate (15) on lead screw (14), the one end of lead screw (14) is fixed with dwang (17), the bottom of locating plate (15) is connected with places dish (12), the top fixed mounting of lead screw (14) has scale (13), the right-hand member welding of bottom plate (7) has L type pole (10), and the top welding of L type pole (10) has the arm-tie.

2. A physical lever principle demonstration device according to claim 1 wherein the lever is made of a solid rod, the connecting groove (16) is provided with an opening on both sides of the outer wall, and the two ends of the positioning plate (15) extend to the outside of the opening respectively.

3. The physical lever principle demonstration device according to claim 1, wherein a mounting buckle is welded to the bottom of the positioning plate (15), a mounting rope is tied to the mounting buckle, and the lower end of the mounting rope is fixedly connected with the placing disc (12).

4. A physical leverage demonstration aid according to claim 1 wherein the ends of the two lead screws (14) remote from each other extend outside the attachment slot (16) and are fixedly attached to a turning rod (17).

5. The physical lever principle demonstration device according to claim 1, wherein the two sides of the bottom of the lifting rod (2) are fixedly provided with the insertion blocks (4), the two sides of the outside of the insertion blocks (4) are fixedly provided with the first rubber blocks (5), the two sides of the top of the dust-proof box (1) are provided with the clamping grooves (3), the inner walls of the clamping grooves (3) are fixedly provided with the second rubber blocks (6), and the first rubber blocks (5) and the second rubber blocks (6) are arranged in a matched mode.

6. A physical lever principle demonstration device according to claim 1 wherein the length of the graduated scale (13) is equal to the length of the lever, and the two positioning plates (15) are symmetrically arranged on both sides of the lever.