阅读说明：本技术 一种自由落体教学实验设备 (Free fall teaching experiment equipment ) 是由 伏春平 于 2019-11-29 设计创作，主要内容包括：本发明属于物理动力学教育演示用具技术领域,公开了一种自由落体教学实验设备,包括底座和固定在底座上的架体,架体上滑动连接有挡板,还包括固定在架体上的两个实验管体,实验管体两端均封闭,实验管体顶端设有进料口,实验管体下部设有出料口；挡板设有两个,且两个挡板分别贯穿两个实验管体的上部,且与实验管体滑动连接；底座上还固定有抽气泵,抽气泵的抽气口与两个实验管体连通。本发明解决了现目前进行实验时,物块在下落过程中会发生相互干扰,影响实验结果的问题。(The invention belongs to the technical field of physical dynamics education demonstration appliances, and discloses free falling body teaching experiment equipment which comprises a base, a frame body and two experiment tube bodies, wherein the frame body is fixed on the base; the two baffles penetrate through the upper parts of the two experimental tube bodies respectively and are connected with the experimental tube bodies in a sliding manner; still be fixed with the aspiration pump on the base, the extraction opening and two experiment bodys intercommunication of aspiration pump. The invention solves the problem that the experiment result is influenced by mutual interference of the object blocks in the falling process when the experiment is carried out at present.)

1. The utility model provides a free fall teaching experiment equipment, includes the base and fixes the support body on the base, sliding connection has baffle, its characterized in that on the support body: the device is characterized by also comprising two experiment tubes fixed on the frame body, wherein one side of each experiment tube corresponding to the frame body is transparent, two ends of each experiment tube are sealed, a feed inlet is formed in the top end of each experiment tube, and a discharge outlet is formed in the lower part of each experiment tube; the two baffles penetrate through the upper parts of the two experimental tube bodies respectively and are connected with the experimental tube bodies in a sliding manner; still be fixed with the aspiration pump on the base, the extraction opening and two experiment bodys intercommunication of aspiration pump.

2. The free fall teaching experiment device of claim 1, wherein: vertical sliding connection backup pad in the experiment body is equipped with the spring between backup pad bottom and the experiment body bottom.

3. The free fall teaching experiment apparatus of claim 2, wherein: the base is also fixedly provided with a support, the support is positioned on one side of the frame body, which is not provided with the experimental tube body, two timers are fixed on the support, two button switches are electrically connected to both the two timers, the button switches are fixed on one side of the support, which is close to the frame body, the button switches are respectively positioned on the upper side and the lower side of the timers, and the button switches on the upper portion and the baffle are positioned on the same horizontal plane; there are two press bars along perpendicular to experimental object whereabouts direction sliding connection on the support body, two press bars run through two experiment bodys respectively and with experiment body sliding connection, press the lever and be located the backup pad below, and press button switch of lever and lower part and be located same horizontal plane.

4. A free fall teaching experiment apparatus as claimed in claim 3, wherein: one end of the pressing rod, which is positioned in the experiment tube body, is a wedge surface.

5. The free fall teaching experiment device of claim 4, wherein: the pressing rod is L-shaped, the vertical part of the pressing rod is positioned outside the frame body, and a spring is arranged between the vertical part of the pressing rod and the frame body.

6. A free fall teaching laboratory apparatus according to any one of claims 1 to 5 wherein: the discharge gate is located the backup pad below, and the backup pad bottom all articulates there are two telescopic links, is equipped with the dog on the inner wall that the experiment body is relative with the discharge gate, and the dog is located the backup pad below.

7. The free fall teaching experiment device of claim 6, wherein: the frame body is positioned below the experiment tube body, and the bottom of each telescopic rod is fixedly provided with a push rod which penetrates through the bottom end of the experiment tube body and is in sliding connection with the bottom end of the experiment tube body; the feeding structure comprises a lever hinged in the mounting groove, one end of the lever is positioned below the push rod, the other end of the lever is positioned between the frame body and the bracket, and the other end of the lever is fixedly provided with a moving rod; one side of the frame body close to the bracket is vertically and slidably connected with a conveying frame which can be communicated with the discharge hole; support upper portion is equipped with places the frame, transports the frame can with place the frame intercommunication, and be equipped with on the support body and be used for avoiding the stopper of experiment thing piece roll-off.

8. The free fall teaching experiment device of claim 7, wherein: two baffle plates are fixed through a connecting rod, and a spring is arranged between the connecting rod and the frame body.

9. The free fall teaching experiment device of claim 8, wherein: the top of the baffle is provided with a groove.

10. The free fall teaching experiment apparatus of claim 9, wherein: the experiment pipe bodies are communicated through communicating pipes.

Technical Field

The invention belongs to the technical field of physical dynamics education demonstration appliances, and particularly relates to free fall teaching experimental equipment.

Background

One of very classic experiment in free fall laboratory physical teaching, traditional experiment is through mr or student with two or more test object place in same height, and the loose hand of while again observes the fall time of two or more objects, but this kind of experimental mode receives external factor's influence great, can not ensure that two experimental objects fall simultaneously from same height during the experiment moreover. For overcoming the problem, an experimental facility has appeared, including the support body, sliding connection has the dog on the support body, through placing the test object on the dog for the test object is located same height, and the dog slides, makes the holding power of test object disappear, falls in step simultaneously. Utilize this kind of experimental facilities to carry out the experiment and can guarantee that the object falls simultaneously from same height, however, at the in-process that falls, the object can take place mutual interference, influences the result of experiment.

Disclosure of Invention

The invention aims to provide free falling body teaching experiment equipment to solve the problem that experiment results are influenced by mutual interference of object blocks in the falling process when experiments are carried out at present.

In order to achieve the purpose, the invention provides the following technical scheme that the free falling body teaching experiment equipment comprises a base, a frame body fixed on the base and two experiment tube bodies fixed on the frame body, wherein the frame body is connected with a baffle in a sliding manner; the two baffles penetrate through the upper parts of the two experimental tube bodies respectively and are connected with the experimental tube bodies in a sliding manner; still be fixed with the aspiration pump on the base, the extraction opening and two experiment bodys intercommunication of aspiration pump.

The technical principle of the technical scheme is as follows:

place two experimental article pieces (usually two iron balls of different weight) respectively on the baffle to utilize the aspiration pump to bleed to the experiment body, make and keep certain vacuum in the experiment body, the baffle that slides simultaneously again makes the experimental article piece on two baffles fall down in step, and two experimental article pieces are located two experiment bodys respectively, can avoid taking place mutual interference at the in-process of experiment. And one side that corresponds through with the experiment body and support body sets up to transparent, can conveniently observe.

The beneficial effects of the technical scheme are as follows:

1. by arranging the two independent experiment tube bodies, the two experiment blocks can independently move, and the two experiment blocks are prevented from interfering with each other, so that the accuracy of the experiment is improved; the experiment is carried out in the independent pipe body, so that the influence of the external environment on the experiment can be reduced;

2. the air extracting pump is used for extracting air from the experiment tube body, so that a certain vacuum degree can be kept in the experiment tube body, and the influence of air resistance on an experiment result is reduced;

3. keep certain vacuum in the experiment body, can reduce the propagation medium of sound, and then can reduce the noise that the striking sent when the experiment thing piece falls to experiment body bottom.

Further, vertical sliding connection backup pad in the experiment body is equipped with the spring between backup pad bottom and the experiment body bottom.

Has the advantages that: set up the spring in backup pad lower part and can reduce the striking of experiment thing piece to the backup pad, play the effect of buffering.

Further, a bracket is fixed on the base and is positioned on one side of the frame body, which is not provided with the experimental tube body, two timers are fixed on the bracket, two button switches are electrically connected to both the two timers, the button switches are fixed on one side of the bracket, which is close to the frame body, the button switches are respectively positioned on the upper side and the lower side of the timers, and the button switches on the upper side and the baffle are positioned on the same horizontal plane; there are two press bars along perpendicular to experimental object whereabouts direction sliding connection on the support body, two press bars run through two experiment bodys respectively and with experiment body sliding connection, press the lever and be located the backup pad below, and press button switch of lever and lower part and be located same horizontal plane.

Has the advantages that: compared with the prior art that manual timing is adopted, the precision is higher. When the baffle is slid on the upper part, the timer is started after the baffle is contacted with the button switch on the upper part, and the timer starts to time; when the thing piece fell, during the striking backup pad, the backup pad extrusion pressed the pole roll-off to the button switch of extrusion lower part, thereby pause the time-recorder, look over the time on two time-recorders, contrast, just can reach the experimental result. And even if the two baffles do not slide synchronously, the time interval for pressing the upper button switch and the lower button switch is not changed, so that the experimental result is not influenced.

Furthermore, one end of the pressing rod in the experiment tube body is a wedge surface.

Has the advantages that: the wedge surface can make things convenient for the backup pad to push when moving down and press the depression bar, realizes pressing the interior extrusion button switch of depression bar roll-off experiment body.

Furthermore, the pressing rod is L-shaped, the vertical part of the pressing rod is positioned outside the frame body, and a spring is arranged between the vertical part of the pressing rod and the frame body.

Has the advantages that: after the pressing rod slides out, the pressing rod can automatically reset under the action of the spring without being pressed by the supporting plate.

Further, the discharge gate is located the backup pad below, and the backup pad bottom all articulates there are two telescopic links, is equipped with the dog on the inner wall that the experiment body is relative with the discharge gate, and the dog is located the backup pad below.

Has the advantages that: when the experiment thing piece drove the backup pad and moves down, the telescopic link supported the backup pad to realize moving down smoothly of backup pad, after one side and the dog contact of backup pad, the opposite side of backup pad continued to move down, and then the backup pad takes place the slope, makes things convenient for the experiment thing piece from the discharge gate roll-off.

Furthermore, the frame body is positioned below the experiment tube body, and an installation groove is arranged below the experiment tube body; the feeding structure comprises a lever hinged in the mounting groove, one end of the lever is positioned below the push rod, the other end of the lever is positioned between the frame body and the bracket, and the other end of the lever is fixedly provided with a moving rod; one side of the frame body close to the bracket is vertically and slidably connected with a conveying frame which can be communicated with the discharge hole; support upper portion is equipped with places the frame, transports the frame can with place the frame intercommunication, and be equipped with on the support body and be used for avoiding the stopper of experiment thing piece roll-off.

Has the advantages that: through setting up the pay-off structure, can transport the experiment thing piece of roll-off to the top, and then make things convenient for taking of thing piece. When the supporting plate moves downwards, the push rod is driven to move downwards, so that one end of the lever is extruded, and the other end of the lever moves upwards; when the experiment thing piece landing from the backup pad, the backup pad drives the push rod and resets, and then makes the other end of lever move down for transport frame and discharge gate intercommunication, the experiment thing piece falls to transporting in the frame, when carrying out the experiment next time, when the one end of push rod extrusion lever, make the other end of lever promote to transport the frame and shift up, and make transport the frame and place the frame intercommunication, transmit the experiment thing piece to placing in the frame, conveniently take.

Furthermore, the two baffle plates are fixed through a connecting rod, and a spring is arranged between the connecting rod and the frame body.

Has the advantages that: the connecting rod is arranged, so that the two baffle plates can synchronously move, and two experimental blocks can synchronously move downwards conveniently; the spring is arranged, so that the baffle can automatically reset after the experimental object blocks fall down.

Further, the top of the baffle is provided with a groove.

Has the advantages that: the arrangement of the groove enables the experimental block to be kept balanced on the baffle conveniently, and shaking of the experimental block is avoided.

Further, the experiment pipe bodies are communicated through communicating pipes.

Has the advantages that: utilize communicating pipe with two experiment bodys intercommunication, can realize keeping the same vacuum in two experiment bodys, ensure that the experimental environment is unanimous, reduce the influence to the experimental result.

Drawings

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

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic structural view of a feeding structure in embodiment 2 of the present invention;

fig. 4 is a sectional view taken along line a-a in fig. 3.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a base 1, a frame body 2, a through hole 21, a bracket 3, a timer 31, a button switch 32, an experiment tube body 4, a baffle plate 41, a connecting rod 411, a groove 412, a feed inlet 42, a sealing plug 43, a push block 44, a pressing rod 45, a stop block 46, a discharge hole 47, a communicating pipe 48, a supporting plate 5, a push rod 51, a rack 511, an expansion rod 52, an air suction pump 6, an air suction pipe 61, a gear 62, a lever 7, a moving rod 71, a conveying frame 8, a communicating hole 81, a sliding hole 82, a shielding plate 83, a blocking block 84, a placing frame 9, a sliding hole 91 and a sealing plate 92.