CN209746889U

CN209746889U - Friction experiment demonstration device for middle school physics

Info

Publication number: CN209746889U
Application number: CN201920002671.XU
Authority: CN
Inventors: 吴岳泽; 吴振国
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-02
Filing date: 2019-01-02
Publication date: 2019-12-06
Anticipated expiration: 2029-01-02

Abstract

The utility model discloses a middle school is frictional force experiment presentation device for physics, comprising a base plate, the symmetry is equipped with two risers on the bottom plate, rotate on the riser and installed square board, the screw rod has been installed down to square board one end, the cover is equipped with a round support section of thick bamboo on the screw rod, a round support section of thick bamboo and screw rod threaded connection, the lower terminal surface dress of a round support section of thick bamboo is equipped with round bottom plate. Rotatory swing arm, and then change the screw rod and support the drum cooperation height, place the upper end at the bottom plate with the round bottom board lower extreme, and then change the height that square board left side was supported, square board inclination has been changed, it is more stable to change square board gradient, the order material that the friction disc distributes about according to from top to bottom is chloroprene rubber respectively, the stainless steel, silica gel and polytetrafluoroethylene, therefore when inserting the square groove of slider different faces in the card strip, make the lower extreme of the friction disc of different materials contact the upper end of square board, need not to use a plurality of sliders.

Description

Friction experiment demonstration device for middle school physics

Technical Field

The utility model relates to a friction experiment demonstration device for middle school physics.

background

The experimental physics is a discipline which theoretically explores the basic laws of material structure, interaction and material motion unknown in nature relative to the theoretical physics, the research field of the theoretical physics relates to particle physics, atomic nucleus physics, statistical physics, condensed state physics and cosmology, and almost comprises the basic theoretical problems of all branches of physics, and the experimental physics is mainly used for experimentally exploring the material world and natural laws.

Present middle school student is frictional force experiment presentation device for physics, wholly be a mechanism that can adjust square board gradient, the pivot has been installed on the right side of square board, the up end right side symmetry of bottom plate is equipped with the riser, the rotor groove normal running fit of pivot and riser the inner, therefore can make square board up-and-down rotary motion, and set up one on the bottom plate and can be rotatory the depression bar that supports, will support the rotatory back of depression bar then when supporting the different positions of square board lower extreme, can change the gradient of square board, therefore can place the slider and slide at the up end of square board, simultaneously with the time of stopwatch record slider through square board, the existence has: firstly, adopt to support and press the pole to support and press square board lower extreme and adjust the rotation angle of square board, can make to support and press the pole upset to pass because of rocking in the operation process, cause square board lower extreme to lose to support and press and turn over down, unstability, second, only can show a material to the student and square board cooperation frictional force, therefore during the experiment, need take the slider that the terminal surface friction material is different.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a friction experiment presentation device for middle school physics to provide in solving above-mentioned background art and adjust the unstable problem that can only represent a friction material of square board gradient and single slider.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a middle school physics is with frictional force experiment presentation device, includes the bottom plate, the symmetry is equipped with two risers on the bottom plate, square board has been installed in the rotation on the riser, the screw rod has been installed downwards to square board one end, the cover is equipped with a circle and supports a section of thick bamboo on the screw rod, a circle supports a section of thick bamboo and screw rod threaded connection, the lower terminal surface dress of a circle support section of thick bamboo is equipped with round bottom plate, square board's up end is equipped with the card strip, the slider has been placed to square board's up end, the terminal surface is equipped with the square groove about the upper and lower of slider, insert the card strip in the square groove, the terminal surface bonds respectively about.

Preferably, the vertical plate is provided with a rotary groove, a rotary shaft is rotatably arranged in the rotary groove, and the rotary shaft is welded with the square plate.

Preferably, the inner wall of the rotary groove is uniformly coated with lubricating oil.

Preferably, the friction plates are respectively made of chloroprene rubber, stainless steel, silica gel and polytetrafluoroethylene according to the sequence of vertical and horizontal distribution.

Preferably, two sides of the lower part of the round supporting cylinder are symmetrically provided with rotary rods.

Compared with the prior art, the beneficial effects of the utility model are that: first, rotatory swing arm, through screw rod and internal screw thread spiral cooperation, make the cylinder of supporting from top to bottom rotatory movement, and then change the screw rod and support the cylinder cooperation height, place the upper end at the bottom plate with the round bottom plate lower extreme, and then change the height that square board left side was supported, square board inclination has been changed, it is more stable to change square board inclination, the unstable problem of adjusting square board inclination has been solved, secondly, the order material that the friction disc distributes about according to from top to bottom is chloroprene rubber respectively, stainless steel, silica gel and polytetrafluoroethylene, therefore when inserting the square groove of the different faces of slider in the card strip, make the lower extreme contact square board's of the friction disc of different materials upper end, need not to use a plurality of sliders, the problem that a friction material can only be represented to single slider has still been solved.

Drawings

FIG. 1 is a partially cut-away front view of the present invention;

FIG. 2 is a schematic view of the rotation shaft and the rotation groove of the present invention;

Fig. 3 is a schematic view of the square groove and the card strip of the present invention.

In the figure: the device comprises a base plate 1, a vertical plate 2, a rotary groove 3, a rotating shaft 4, a square plate 5, a screw 6, a round supporting cylinder 7, an internal thread 8, a round base plate 9, a rotary rod 10, a clamping strip 11, a sliding block 12, a square groove 13 and a friction plate 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a friction force experiment demonstration device for middle school physics comprises a bottom plate 1, wherein the bottom plate 1 is of a square plate-shaped structure, the bottom plate 1 and a vertical plate 2 are of an integral piece, the vertical plate 2 is of a vertical square plate-shaped structure, a rotary groove 3 is formed in the vertical plate 2, lubricating oil is uniformly coated on the inner wall of the rotary groove 3, the rotary shaft 4 can rotate and slide in the rotary groove 3, the rotary shaft 4 is arranged in the rotary groove 3 in a rotating mode, the matched cross section of the rotary groove 3 and the rotary shaft 4 is circular and in sliding fit, meanwhile, the front end face and the rear end face of the rotary shaft 4 are in sliding fit with the inner outer end of the rotary groove 3, the rotary shaft 4 is limited to move back and forth when the rotary groove 3 rotates, two vertical plates 2 are symmetrically arranged on the bottom plate 1, a square plate 5 is arranged on the vertical plate 2 in a rotating mode, a screw 6 is arranged at one end of the square plate 5, the upper end of screw rod 6 is connected to the lower terminal surface left side of square board 5 adoption welded mode, the cover is equipped with a round support section of thick bamboo 7 on the screw rod 6, round support section of thick bamboo 7 is circular tubular structure, the upper end is the open mode, round support section of thick bamboo 7 and screw rod 6 threaded connection, rotatory round support section of thick bamboo 7, can make round support section of thick bamboo 7 rotatory removal from top to bottom, round support section of thick bamboo 7's lower terminal surface dress is equipped with circle bottom plate 9, the lower terminal surface of round support section of thick bamboo 7 adopts the welded mode to connect the up end central point of circle bottom plate 9 and puts, round bottom plate 9 is a circular platelike structure, the lower part bilateral symmetry of round support section of thick bamboo 7 is equipped with swing arm 10, round support section of thick bamboo 7 is integrative with swing arm 10, swing arm 10 distributes in the lower part both sides of round support section of.

Referring to fig. 1, 2 and 3, a clamping strip 11 is arranged on the upper end surface of a square plate 5, the clamping strip 11 is of a square strip structure, a sliding block 12 is arranged on the upper end surface of the square plate 5, the sliding block 12 is of a square block structure, square grooves 13 are arranged on the upper, lower, left and right end surfaces of the sliding block 12, the square grooves 13 are of a square groove structure, the clamping strip 11 is inserted into the square grooves 13, the front and rear gaps of the square grooves 13 after being matched with the clamping strip 11 are 0.2 mm, through the insertion type sliding fit of the square grooves 13 and the clamping strip 11, the sliding block 12 cannot move towards the side when sliding obliquely right and down, friction plates 14 are respectively bonded on the upper, lower, left and right end surfaces of the sliding block 12, the upper, lower, left and right end surfaces of the sliding block 12 are connected with the inner ends of the friction plates 14 in a resin adhesive manner, the friction plates 14 are respectively made of neoprene, stainless steel, silica gel and polytetrafluoroethylene according to the, so that the lower ends of the friction plates 14 of different substances contact the upper end of the square plate 5 without using a plurality of sliders 12.

The utility model discloses when concrete implementation: the matching section of the rotary groove 3 and the rotary shaft 4 is circular and is in sliding fit, meanwhile, the front end face and the rear end face of the rotary shaft 4 are in sliding fit with the inner outer end of the rotary groove 3, the front end face and the rear end face of the rotary shaft 4 are limited to move back and forth when the rotary shaft 4 rotates in the rotary groove 3, so that the square plate 5 is turned stably up and down, the square plate 5 is turned over upwards, the rotary screw 10 is rotated, the round supporting cylinder 7 is rotated and moved up and down through the screw fit of the screw 6 and the internal thread 8, the matching height of the screw 6 and the supporting cylinder 7 is changed, the lower end of the round bottom plate 9 is placed at the upper end of the bottom plate 1, the supported height of the left side of the square plate 5 is changed, the inclination angle of the square plate 5 is changed, the square plate 5 is limited to turn over downwards due to self gravity through the occlusion of the screw 6 and the internal thread 8, the inclination of, then the slide block 12 is loosened, the slide block 12 slides along the lower right inclined surface of the square plate 5 through the self gravity of the slide block 12, the gliding speed of the slide block 12 is reduced through the friction plate 14, namely the gliding time can be recorded by using a stopwatch, and the friction plate 14 is respectively made of chloroprene rubber, stainless steel, silica gel and polytetrafluoroethylene according to the sequence of vertical distribution and horizontal distribution, so that when the square grooves 13 on different surfaces of the slide block 12 are inserted into the clamping strips 11, the lower ends of the friction plates 14 made of different materials are in contact with the upper end of the square plate 5, and a plurality of slide blocks 12 are not needed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a friction experiment presentation device for middle school physics, includes bottom plate (1), its characterized in that: the improved structure is characterized in that two vertical plates (2) are symmetrically arranged on the bottom plate (1), a square plate (5) is installed on the vertical plates (2) in a rotating mode, a screw rod (6) is installed on one end of the square plate (5) downwards, a round supporting cylinder (7) is sleeved on the screw rod (6), the round supporting cylinder (7) is in threaded connection with the screw rod (6), a round bottom plate (9) is installed on the lower end face of the round supporting cylinder (7), a clamping strip (11) is arranged on the upper end face of the square plate (5), a sliding block (12) is placed on the upper end face of the square plate (5), square grooves (13) are formed in the upper end face and the lower end face of the sliding block (12), the clamping strip (11) is inserted into the square grooves (13), and friction plates (14) are respectively bonded on the upper.

2. The friction force experiment demonstration device for middle school physics according to claim 1, characterized in that: the vertical plate (2) is provided with a rotary groove (3), a rotary shaft (4) is rotatably arranged in the rotary groove (3), and the rotary shaft (4) is welded with the square plate (5).

3. the friction force experiment demonstration device for middle school physics according to claim 2 is characterized in that: the inner wall of the rotary groove (3) is uniformly coated with lubricating oil.

4. The friction force experiment demonstration device for middle school physics according to claim 1, characterized in that: the friction plates (14) are respectively made of chloroprene rubber, stainless steel, silica gel and polytetrafluoroethylene according to the sequence of vertical and horizontal distribution.

5. The friction force experiment demonstration device for middle school physics according to claim 1, characterized in that: the two sides of the lower part of the round supporting cylinder (7) are symmetrically provided with rotary rods (10).