CN212010033U

CN212010033U - Newton's second law demonstration device

Info

Publication number: CN212010033U
Application number: CN202020945008.6U
Authority: CN
Inventors: 王家伟; 何健; 邢跃; 秦康
Original assignee: Hefei Andakerun Education Co ltd
Current assignee: Hefei Andakerun Education Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-11-24
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a Newton's second law presentation device belongs to teaching demonstration technical field, including the stand, be provided with first motion on the stand and be used for driving the second motion that first motion moved and reset, first motion is inhaled with second motion magnetism and is connected, the motion end of first motion is connected with because the counter weight mechanism of pulling the motion of first motion, first motion includes the dolly, the guide arm and the slide mechanism who cup joints with the guide arm slip, dolly and slide mechanism fixed connection, second motion is inhaled with slide mechanism magnetism and is connected, slide mechanism includes the slider, first mount pad, second mount pad and inhales the piece, the slider slides and cup joints in guide arm outside axial, the upper surface of slider inhales piece fixed connection through first mount pad and dolly fixed connection, the lower surface inhales piece fixed connection through the second mount pad, inhale piece and set for distance with second motion interval, the distance, And magnetically connecting; the mechanical reset of the trolley during Newton's second law demonstration is realized by adopting the device.

Description

Newton's second law demonstration device

Technical Field

The utility model relates to a teaching demonstration technical field especially relates to newton's second law presentation device.

Background

As is well known, the physical teaching has the teaching content of Newton's second law, and a demonstration instrument is used for facilitating understanding and observation of students. However, the newton's second law demonstration apparatus sold in the market at present adopts a trolley arranged on a plane, a weight with a certain mass can be placed in the trolley, the trolley is pulled by a rope to perform uniform acceleration movement with zero initial speed under the action of a fixed pulley by utilizing the power generated by the falling of the weight, and thus students can understand and master the knowledge. In the demonstration process, because the one-way motion of dolly, consequently need the manual assistance dolly to reset for the operation is too complicated, and the visibility is felt relatively poor with experience simultaneously.

SUMMERY OF THE UTILITY MODEL

Based on the technical problem that the background art exists, the utility model provides a newton's second law presentation device has realized mechanized, the automatic of dolly and has reset.

The utility model provides a Newton's second law presentation device, including the stand, be provided with first motion on the stand and be used for driving the second motion that first motion moved and resets, first motion is inhaled with second motion magnetism and is connected, and first motion's motion end is connected with because the counter weight mechanism of the motion of the first motion of pulling.

Furthermore, the first motion mechanism comprises a trolley, a guide rod and a sliding mechanism in sliding sleeve connection with the guide rod, the trolley is fixedly connected with the sliding mechanism, and the second motion mechanism is in magnetic attraction connection with the sliding mechanism.

Further, slide mechanism includes slider, first mount pad, second mount pad and inhales the piece, and the slider slides to cup joint in guide arm outside axial, and the upper surface of slider inhales a fixed connection through first mount pad and dolly fixed connection, lower surface through the second mount pad, inhales piece and second motion interval set distance, and magnetism is inhaled and is connected.

Furthermore, the first movement mechanism further comprises a third mounting seat fixed on the exhibition stand, and the third mounting seat is respectively sleeved at two ends of the guide rod.

Furthermore, the second motion mechanism comprises a linear motion mechanism, an electromagnet and a fourth mounting seat for fixing the electromagnet, the fourth mounting seat is fixed on the linear motion mechanism, and the electromagnet and the suction block are arranged at a set distance.

Furthermore, the counterweight mechanism comprises a pull rope and a weight tray, wherein one end of the pull rope is fixedly connected with the weight tray, and the other end of the pull rope is fixedly connected with the trolley through a pulley block.

Further, the weight-balancing device further comprises a protection mechanism, the weight-balancing mechanism is arranged in the protection mechanism, and a buffer pool placed in the protection mechanism is arranged below the weight tray.

Furthermore, a weight groove for placing the movable weight is arranged on the trolley.

The utility model provides a newton's second law presentation device's advantage lies in: the utility model provides a Newton's second law demonstration device, the magnetic attraction connection relation between the electromagnet and the attraction block realizes the mechanical and automatic reset of the trolley; the weight groove for placing the movable weight is arranged on the trolley, and the weight of the trolley is changed by changing the number of the movable weights in the weight groove so as to demonstrate the principle that the mass of an object accelerated by an object is inversely proportional; the stress of the trolley is changed by placing the weights in the weight tray, so that the principle that the acceleration of the object is in direct proportion to the acting force is further demonstrated.

Drawings

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

FIG. 2 is a schematic structural view of a first motion mechanism and a second motion mechanism;

FIG. 3 is a schematic structural view of a plurality of first motion mechanisms arranged in parallel;

the device comprises a display stand 1, a first movement mechanism 2, a second movement mechanism 3, a counterweight mechanism 4, a protection mechanism 5, a buffer pool 6, a trolley 21, a guide rod 22, a sliding mechanism 23, a third mounting seat 24, a linear movement mechanism 31, an electromagnet 32, a fourth mounting seat 33, a pull rope 41, a scale pan 42, a weight groove 211, a sliding block 231, a first mounting seat 232, a second mounting seat 233 and a suction block 234.

Detailed Description

The technical solutions of the present invention are explained in detail below with reference to specific embodiments, and many specific details are set forth in the following description to provide a thorough understanding of the present invention. The present invention can be embodied in many other forms than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention.

As shown in fig. 1 to 3, the utility model provides a newton's second law presentation device, including stand 1, be provided with first motion 2 on the stand 1 and be used for driving the second motion 3 that the motion of first motion 2 resets, first motion 2 is inhaled with 3 magnetism of second motion and is connected, and the motion end of first motion 2 is connected with because the counter weight mechanism 4 of the motion of the first motion 2 of pulling.

The first movement mechanism 2 and the second movement mechanism 3 move in the same direction, and the second movement mechanism 3 can be disposed inside the exhibition stand 1 for the aesthetic appearance of the whole device, so that the whole device is simple in appearance. First motion 2 is under the effect of counter weight mechanism 4, along certain direction motion, second motion 3 also moves along the same direction simultaneously, after two motion completions, second motion 3 will absorb first motion 2 and return the original position, realize resetting of first motion 2, in order to accomplish the demonstration of next newton's second law, the degree of mechanization that has improved the demonstration of newton's second law, the mode of having avoided adopting artifical supplementary, the defect that resets is carried out with first motion 2 after the motion.

Further, as shown in fig. 2, the first movement mechanism 2 includes a trolley 21, a guide rod 22 and a sliding mechanism 23 slidably sleeved with the guide rod 22, the trolley 21 is fixedly connected with the sliding mechanism 23, and the second movement mechanism 3 is magnetically connected with the sliding mechanism 23. The sliding mechanism 23 comprises a sliding block 231, a first mounting seat 232, a second mounting seat 233 and a suction block 234, the sliding block 231 is slidably sleeved on the outer axial direction of the guide rod 22, the upper surface of the sliding block 231 is fixedly connected with the trolley 21 through the first mounting seat 232, the lower surface of the sliding block 231 is fixedly connected with the suction block 234 through the second mounting seat 233, and the suction block 234 is spaced from the second moving mechanism 3 by a set distance and is magnetically connected with the second moving mechanism. The first moving mechanism 2 further includes a third mounting seat 24 fixed on the exhibition stand 1, and the third mounting seats 24 are respectively sleeved at two ends of the guide rod 22.

Guide arm 22 is through the stable fixed in stand 1 of third mount pad 24, sliding connection between slider 231 and the guide arm 22, make the dolly 21 that receives the pulling force of counter weight mechanism 4 can move along guide arm 22's direction, in order to realize the relation between the acceleration of object and the effort, can be provided with the weight groove 211 that is used for placing the movable weight on dolly 21 simultaneously, through how much of the movable weight in change weight groove 211, in order to change the weight of dolly, in order to demonstrate the principle that the quality of object acceleration object is the inverse ratio, more audio-visual understanding newton's second law.

Further, the counterweight mechanism 4 comprises a pull rope 41 and a weight tray 42, wherein one end of the pull rope 41 is fixedly connected with the weight tray 42, and the other end is fixedly connected with the trolley 21 through a pulley block. The stress of the trolley is changed by placing the weights in the weight tray 42, so that the principle that the acceleration of an object is in direct proportion to the acting force is further demonstrated, and the Newton's second law is more intuitively understood.

Further, the second moving mechanism 3 includes a linear moving mechanism 31, an electromagnet 32, and a fourth mounting seat 33 for fixing the electromagnet 32, the fourth mounting seat 33 is fixed on the linear moving mechanism 31, and the electromagnet 32 and the suction block 234 are spaced by a set distance. The linear motion mechanism 31 may be a combination of a synchronous wheel and a synchronous belt, and the fourth mounting seat 33 is fixedly disposed on the synchronous belt; the linear motion mechanism 31 may also be a linear cylinder, the fourth mounting seat 33 is fixed at an output end of the linear cylinder, and the fourth mounting seat 33 is moved by contraction of the linear cylinder, so that the electromagnet 32 is moved along with the movement of the trolley 21.

The electromagnet 32 generates magnetic attraction to suck the suction block 234 when being electrified and cuts off the connection with the suction block 234 when being powered off; when the trolley 21 finishes normal demonstration, the electromagnet 32 is powered off; after the trolley 21 finishes normal demonstration, the electromagnet 32 is electrified to suck the suction block 234 so as to reset the trolley 21.

In the present application, a protection mechanism 5 is further included, the counterweight mechanism 4 is arranged in the protection mechanism 5, and a buffer pool 6 placed inside the protection mechanism 5 is arranged below the weight tray 42.

Because the balance weight mechanism 4 has the movable weights, the weight tray 42, the pulley block and other components, in order to reduce the potential safety hazard defect caused to the user when the components are operated by the user, the balance weight mechanism 4 is arranged in the protection mechanism 5, the protection mechanism can be a protection cover, and meanwhile, the buffer pool 6 is arranged below the weight tray 42, so that the movable weights falling from the weight tray 42 can be intensively processed.

The working process is as follows: when the trolley 21 moves to the reset position, the electromagnet 32 is powered off, the weight tray 42 pulls the trolley 21 to move along the direction of the guide rod 22 through the pull rope 41, the electromagnet 32 moves through the linear motion mechanism 31, the moving directions of the electromagnet 32 and the trolley 21 are consistent, when the trolley 21 finishes moving, after a set time interval, the electromagnet 32 is powered on to adsorb the adsorption block 234, and the linear motion mechanism 31 works to drive the electromagnet 32 to move towards the reset direction of the trolley 21, so that the mechanical reset of the trolley 21 is realized. Meanwhile, as shown in fig. 3, a plurality of first motion mechanisms 2, a plurality of second motion mechanisms 3, and a plurality of counterweight mechanisms 4 may be simultaneously disposed in the present application to meet the requirement of simultaneous operation of a plurality of operators, that is, each first motion mechanism 2, each second motion mechanism 3, and each counterweight mechanism 4 form a group of demonstration devices, and a plurality of groups of demonstration devices form a group of demonstration devices, so that simultaneous operation of a plurality of operators may be achieved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. Newton's second law presentation device, including stand (1), its characterized in that is provided with first motion (2) and is used for driving second motion (3) that first motion (2) motion reset on stand (1), and first motion (2) are inhaled with second motion (3) magnetism and are connected, and the motion end of first motion (2) is connected with owing to pull counter weight mechanism (4) of first motion (2) motion.

2. The Newton's second law demonstration device according to claim 1, wherein the first motion mechanism (2) comprises a trolley (21), a guide rod (22) and a sliding mechanism (23) slidably sleeved with the guide rod (22), the trolley (21) is fixedly connected with the sliding mechanism (23), and the second motion mechanism (3) is magnetically connected with the sliding mechanism (23).

3. The Newton's second law demonstration device according to claim 2, wherein the sliding mechanism (23) comprises a sliding block (231), a first mounting seat (232), a second mounting seat (233) and a suction block (234), the sliding block (231) is slidably sleeved in the outer axial direction of the guide rod (22), the upper surface of the sliding block (231) is fixedly connected with the trolley (21) through the first mounting seat (232), the lower surface of the sliding block is fixedly connected with the suction block (234) through the second mounting seat (233), and the suction block (234) is connected with the second movement mechanism (3) at a set distance and magnetically attracted.

4. The Newton's second law demonstration device according to claim 2, wherein the first motion mechanism (2) further comprises a third mounting seat (24) fixed on the exhibition stand (1), and the third mounting seat (24) is respectively sleeved at two ends of the guide rod (22).

5. The Newton's second law demonstration device according to claim 3, wherein the second motion mechanism (3) comprises a linear motion mechanism (31), an electromagnet (32) and a fourth mounting seat (33) for fixing the electromagnet (32), the fourth mounting seat (33) is fixed on the linear motion mechanism (31), and the electromagnet (32) and the suction block (234) are arranged at a set distance.

6. Newton's second law demonstration device according to claim 2 characterized in that the counterweight mechanism (4) comprises a pulling rope (41), a weight tray (42), one end of the pulling rope (41) is fixedly connected with the weight tray (42) and the other end is fixedly connected with the trolley (21) through a pulley block.

7. Newton's second law demonstration device according to claim 6 further comprising a protection mechanism (5), wherein the counterweight mechanism (4) is arranged in the protection mechanism (5), and a buffer pool (6) placed inside the protection mechanism (5) is arranged below the weight tray (42).

8. Newton's second law demonstration device according to claim 2 characterised in that the trolley (21) is provided with a weight slot (211) for the placement of a movable weight.