阅读说明：本技术 力学动态平衡演示仪 (Mechanical dynamic balance demonstration instrument ) 是由 赵斌 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种力学动态平衡演示仪。本发明设有多个传感器座,传感器可以拆卸或安装在指定传感器座上,并进行实验演示,在满足多功能的同时,最大限度的减少了传感器的用量,以达到节省制作成本的目的。本发明可以搭载多个传感器,并实时显示数据,测量的数据精确度高,可信度高。并且可以引导学生通过计算对试验现象进行验证。本发明结构简单、合理,可以综合模拟多种力学模型,如动态平衡、力的合成与分解等,为学生提供直观的实验现象。(The invention discloses a dynamic balance demonstration instrument for mechanics. The invention is provided with a plurality of sensor seats, the sensors can be disassembled or installed on the appointed sensor seat, and experimental demonstration is carried out, so that the multifunctional sensor seat can meet the requirements of multiple functions, and the consumption of the sensors is reduced to the maximum extent, thereby achieving the purpose of saving the manufacturing cost. The invention can carry a plurality of sensors and display data in real time, and has high accuracy and high reliability of measured data. And can guide students to verify experimental phenomena through calculation. The invention has simple and reasonable structure, can comprehensively simulate various mechanical models such as dynamic balance, force synthesis and decomposition and the like, and provides visual experimental phenomena for students.)

1. The dynamic mechanical balance demonstration instrument is characterized by comprising a base and a demonstration board, wherein a sliding rail and a sliding block sliding on the sliding rail are arranged at the top of the demonstration board, a fixed pulley is arranged on one side of the sliding rail, and a turntable is arranged right below the fixed pulley;

the demonstration board is provided with two rotating rods, the rotating rods are arranged at intervals, the top of each rotating rod is rotatably connected with the demonstration board, the bottom of each rotating rod is provided with a sensor seat for placing a mechanical sensor, the middle position and the bottom of each rotating rod are provided with handles, the handles penetrate through the demonstration board and extend to the back of the demonstration board, and the demonstration board is provided with a slotted hole for the movement of the handles;

the disc is arranged below the slotted hole and far away from the turntable, a rotating ring which surrounds the disc and rotates around the disc is arranged outside the disc, the rotating ring is provided with two second sensor seats, and included angles are formed between the two second sensor seats.

2. The mechanical dynamic balance demonstration instrument according to claim 1, wherein a third sensor seat is provided on the sliding block.

3. The mechanical dynamic balance demonstration instrument according to claim 1, wherein the demonstration board is provided with a reel at a side far away from the fixed pulley, and a rotating handle for controlling the reel to rotate is arranged at the back of the demonstration board.

4. The mechanical dynamic balance demonstration instrument of claim 1, wherein the swivel is provided with a second handle for controlling the swivel to rotate.

5. The mechanical dynamic balance demonstration instrument according to claim 1, wherein the top of the sliding block is provided with a protrusion for facilitating pushing.

6. The mechanical dynamic balance demonstration instrument according to claim 1, wherein a fourth sensor seat is provided on the turntable.

Technical Field

The invention relates to the field of teaching aids, in particular to a mechanical dynamic balance demonstration instrument.

Background

Mechanics is the indispensable course of physics and the basic course of physics. The mechanical concept is abstract, especially when the concept of force synthesis and decomposition and dynamic balance is involved, students lack intuitive feelings on physical phenomena and are difficult to understand during learning.

At present, no experimental instrument for dynamic equilibrium is available, so the instrument is manufactured.

Disclosure of Invention

The invention aims to overcome the problems and provide demonstration of a dynamic mechanical balance experiment. In order to achieve the purpose, the invention adopts the following technical scheme:

the dynamic mechanical balance demonstration instrument comprises a base and a demonstration board, wherein a sliding rail and a sliding block sliding on the sliding rail are arranged at the top of the demonstration board, a fixed pulley is arranged on one side of the sliding rail, and a rotary table is arranged right below the fixed pulley;

the demonstration board is provided with two rotating rods, the rotating rods are arranged at intervals, the top of each rotating rod is rotatably connected with the demonstration board, the bottom of each rotating rod is provided with a sensor seat for placing a mechanical sensor, the middle position and the bottom of each rotating rod are provided with handles, the handles penetrate through the demonstration board and extend to the back of the demonstration board, and the demonstration board is provided with a slotted hole for the movement of the handles;

the disc is arranged below the slotted hole and far away from the turntable, a rotating ring which surrounds the disc and rotates around the disc is arranged outside the disc, the rotating ring is provided with two second sensor seats, and included angles are formed between the two second sensor seats.

As an improvement, a third sensor seat is arranged on the sliding block.

As an improvement, the demonstration board is provided with a winding drum at one side far away from the fixed pulley, and the back of the demonstration board is provided with a rotating handle for controlling the winding drum to rotate.

As an improvement, a second handle for controlling the rotation of the rotating ring is arranged on the rotating ring.

As an improvement, the top of the sliding block is provided with a convex part which is convenient to push.

As an improvement, a support rod and a fourth sensor seat are arranged on the turntable.

The invention has the advantages that:

1. the dynamic balance experiment demonstration device is simple and reasonable in structure, can accurately demonstrate dynamic balance experiments, can also demonstrate force synthesis and decomposition, and provides visual experiment phenomena for students.

2. The invention is provided with a plurality of sensor seats, the sensors can be disassembled or installed on the appointed sensor seat, and experimental demonstration is carried out, so that the multifunctional sensor seat can meet the requirements of multiple functions, and the consumption of the sensors is reduced to the maximum extent, thereby achieving the purpose of saving the manufacturing cost.

3. The invention can carry a plurality of sensors and display data in real time, and has high accuracy and high reliability of measured data. And can guide students to verify experimental phenomena through calculation.

Drawings

FIG. 1 is a structural diagram of a dynamic balance demonstrator in example 1;

FIG. 2 is a structural view of the back side of the dynamic balance demonstrator in example 1;

FIG. 3 is a diagram of the dynamic balance demonstrator in example 1;

FIG. 4 is a diagram of the state of use of the dynamic balance demonstrator in example 1;

FIG. 5 is a diagram of the dynamic balance demonstrator in example 1;

fig. 6 is a diagram 4 showing the use state of the mechanical dynamic balance demonstration instrument in example 1.

The labels in the figure are:

1-base, 2-demonstration board, 21-slotted hole, 3-sliding rail, 4-sliding block, 41-third sensor seat, 42-bulge, 5-fixed pulley, 6-rotary table, 61-fourth sensor seat, 7-rotary rod, 71-sensor seat, 72-handle, 8-disc, 81-rotary ring, 82-second sensor seat, 83-second handle, 9-reel, 91-rotary handle.

In the figure, a denotes a sensor, B denotes a support rod, and C denotes a weight.

Detailed Description

The present invention will be described in detail and specifically with reference to the following examples so as to facilitate the understanding of the present invention, but the following examples do not limit the scope of the present invention.

Example 1

The embodiment discloses a mechanical dynamic balance demonstration instrument, which comprises a base 1 and a demonstration board 2. The top of the demonstration board 2 is provided with a slide rail 3 and a slide block 4 sliding on the slide rail 3, the slide block 4 is provided with a third sensor seat 41, and the top of the slide block 4 is provided with a protruding part 42 convenient for pushing. A fixed pulley 5 is arranged on one side of the slide rail 3. A turntable 6 is arranged under the fixed pulley 5, and a fourth sensor seat 61 is arranged on the turntable 6.

The demonstration board 2 is provided with two rotating rods 7, and the rotating rods 7 are arranged at intervals. The top of the rotating rod 7 is rotatably connected with the demonstration board 2, and the bottom is provided with a sensor seat 71 for placing a mechanical sensor. The handle 72 is arranged at the middle position and the bottom of the rotating rod 7, the handle 72 penetrates through the demonstration board 2 and extends to the back of the demonstration board 2, and the slotted hole 21 for the handle 72 to move is arranged on the demonstration board 2. A disc 8 is arranged below the slotted hole 21 and far away from the turntable 6, a rotating ring 81 which surrounds the disc 8 and rotates around the disc 8 is arranged outside the disc 8, second sensor seats 82 are arranged on the rotating ring 81, and the number of the second sensor seats 82 is two and is arranged at an included angle of 120 degrees. The swivel 81 is provided with a second handle 83 for controlling the swivel 81 to rotate.

The demonstration board 2 is provided with a winding drum 9 at one side far away from the fixed pulley 5, and the back of the demonstration board 2 is provided with a rotating handle 91 for controlling the winding drum 9 to rotate. The turning handle 91 in this embodiment may be replaced with a motor for powering the spool 9.

The method of use of example 1 is explained below:

1. demonstrating dynamic balance

1.1, as shown in fig. 3, the sensor a is placed in the third sensor seat 41 and the fourth sensor seat 61 and is fixedly connected with the support rod B, the tail end of the support rod B is provided with a rope, the rope passes through the fixed pulley 5 and is fixedly connected with the sliding block 4, and the starting motor rolls the rope through the winding drum 9 to slowly pull the sliding block 4. The support bar B and the turntable 6 rotate counterclockwise or clockwise, and the two sensors respectively display the changes of the elastic force of the bar and the force on the rope.

1.2, as shown in fig. 4, the sensor a is placed on the sensor holder 71 and the third sensor holder 41, a weight C is hung down from the fixed pulley 5, one end of the weight C is fixed to the hanging rope using a rope, and the other end is connected to the sensor a. The rotating rod 7 is controlled by the motor to rotate slowly, and then a second dynamic balance model can be demonstrated.

1.3, as shown in fig. 5, two sensors a are placed on two second sensor mounts 82, respectively, and connected by a rope. A weight C hangs down at the middle position of the rope. The second handle 83 controls the rotation of the rotating ring 81 to observe the change of the reading of the sensor A. A third dynamic equilibrium mechanical model can be demonstrated.

2. Force synthesis and resolution

As shown in fig. 6, two sensors a are placed on two second sensor mounts 82, respectively, and are connected by a rope. A weight C hangs down in the middle of the rope, the reading of the sensor A is read, and the included angle of the two component forces is measured, so that the synthesis and the decomposition of the force can be demonstrated.

The embodiments of the present invention have been described in detail above, but they are merely exemplary, and the present invention is not equivalent to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, it is intended that all equivalent alterations and modifications be included within the scope of the invention, without departing from the spirit and scope of the invention.