Experimental device for physical mechanical efficiency

Abstract

The utility model discloses an experimental device for physical mechanical efficiency, which comprises a base, a vertical plate, a movable pulley, a digital dynamometer, a first pull rope, a second pull rope and a weight, and is characterized in that the vertical plate is vertically arranged in the center of the upper surface of the base, the fixed pulley is arranged on the left side above the front surface of the vertical plate, and the motor is arranged on the right side above the front surface of the vertical plate; the movable pulley is located in front of the vertical plate and under the fixed pulley, and the digital dynamometer is located in front of the vertical plate and under the motor driving shaft. According to the utility model, in the upward movement process of the weight, the digital dynamometer can read the pulling force applied to the connecting end of the second pull rope and the digital dynamometer, the rising distance of the weight can be read through the first scale mark, and the rising distance of the connecting end of the first pull rope and the digital dynamometer can be read through the second scale mark. The weights of the plurality of weights are predictive; the device can accurately read the moving distance of the weight through the first scale mark and the second scale mark.

Description

Technical Field

[0001] This utility model relates to the field of experimental technology of material mechanical efficiency, specifically an experimental device for physical mechanical efficiency. Background Technology

[0002] Mechanical efficiency is a crucial indicator for measuring mechanical performance and a foundation for learning other forms of efficiency, such as heat engine efficiency. It is of paramount importance. Physics textbooks include experiments to "investigate the mechanical efficiency of pulley systems," which not only enhance students' learning interest and practical experience but also deepen their understanding of mechanical efficiency. These experiments range from assembling pulley systems to measuring various physical quantities. However, some existing equipment requires recording a significant amount of experimental data when investigating the mechanical efficiency of pulley systems. This includes measuring the weight of the object, the tension at the free end of the rope, and simultaneously measuring the height the object rises and the distance the free end of the rope moves using a ruler. The large number of measurements and records can be overwhelming and prone to errors in the experimental results.

[0003] In view of the above problems, this utility model is proposed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an experimental device for physical mechanical efficiency, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] This utility model provides an experimental device for physical mechanical efficiency, including a base, a vertical plate, a movable pulley, a digital force gauge, a first pull rope, a second pull rope, and weights. The vertical plate is vertically arranged in the center of the upper surface of the base. A fixed pulley is arranged on the upper left side of the front of the vertical plate, and a motor is arranged on the upper right side of the front of the vertical plate.

[0007] The movable pulley is located in front of the vertical plate and directly below the fixed pulley, and the digital force gauge is located in front of the vertical plate and directly below the motor drive shaft;

[0008] One end of the first pull rope is wound around the drive shaft of the motor and the other end is tied to the upper end of the digital force gauge. The second pull rope is wound between the movable pulley and the fixed pulley. One end of the second pull rope is tied to the lower end of the digital force gauge and the other end is tied to the upper end of the movable pulley. The multiple weights are hung at the lower end of the movable pulley.

[0009] The front of the vertical plate is also provided with a first scale mark and a second scale mark.

[0010] Preferably, the first and second scale marks are both arranged along the height direction of the vertical plate, the movable pulley and the weight are located directly in front of the first scale mark, and the first pull rope and the digital force gauge are located directly in front of the second scale mark.

[0011] Preferably, a controller is also provided in the middle of the back of the vertical plate, and the controller signal is connected to the power supply circuit of the motor.

[0012] Preferably, a mounting hole is provided on the upper right side of the front of the vertical plate, the motor is engaged in the mounting hole, and the drive shaft of the motor faces the front of the vertical plate.

[0013] Preferably, a support rod is vertically provided on the upper surface of the base, the support rod is located behind the vertical plate, and the surface of the support rod is in contact with the back of the vertical plate.

[0014] Preferably, the digital force gauge is provided with hooks at both the upper and lower ends.

[0015] Preferably, hooks are provided at both the upper and lower ends of the movable pulley.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] A fixed pulley is located on the upper left side of the front of the vertical plate, and a motor is located on the right side. The movable pulley is located directly below the fixed pulley, and the digital force gauge is located directly below the motor drive shaft. The upper end of the first pull rope is wrapped around the motor drive shaft, and the lower end of the first pull rope is tied to the upper hook of the digital force gauge, thus fixing the digital force gauge.

[0018] The second pull rope is wound between the fixed pulley and the movable pulley. One end of the second pull rope is fixed to the lower hook of the digital force gauge, and the other end of the second pull rope is tied to the upper hook of the movable pulley. In this way, the second pull rope provides support to the movable pulley.

[0019] In use, multiple weights are suspended from the hook at the lower end of the movable pulley; the controller and motor are powered on, so the controller can control the motor to rotate at a constant speed, so the first pull rope is wound at a constant speed on the drive shaft of the motor, and the digital force gauge can rise at a constant speed. When the digital force gauge rises, it can pull the second pull rope, which can drive the movable pulley to move upward, so the multiple weights move upward together with the movable pulley;

[0020] During the upward movement of the weights, the tension force on the connection between the second pull rope and the digital force gauge can be read through the digital force gauge. The distance the weights have risen can be read through the first scale mark, and the distance the connection between the first pull rope and the digital force gauge has risen can be read through the second scale mark. The weights of the multiple weights are known in advance.

[0021] This device can accurately read the movement distance of the weight and the movement distance of the free end of the rope through the first and second scale markings. The uniform rotation of the motor is more scientific and precise than manual rope pulling, making it easy to raise, lower and stop the weight, while freeing up one hand. The digital force gauge can read the pulling force more intuitively. Attached Figure Description

[0022] Figure 1 This is a perspective view of the entire utility model from one angle;

[0023] Figure 2 This is a perspective view of the entire utility model from another angle;

[0024] Figure 3 This is a perspective view of the vertical plate, the first scale mark, and the second scale mark of this utility model.

[0025] In the diagram: 1. Base; 11. Support rod; 2. Vertical plate; 21. Fixed pulley; 22. Motor; 23. Controller; 24. First scale mark; 25. Second scale mark; 3. Movable pulley; 4. Digital force gauge; 5. First pull rope; 6. Second pull rope; 7. Weight. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figure 1-3 As shown, an experimental device for physical mechanical efficiency includes a base 1, a vertical plate 2, a movable pulley 3, a digital force gauge 4, a first pull rope 5, a second pull rope 6, and a weight 7. The vertical plate 2 is vertically set at the center of the upper surface of the base 1. A fixed pulley 21 is set on the upper left side of the front of the vertical plate 2, and a motor 22 is set on the upper right side of the front of the vertical plate 2.

[0029] The movable pulley 3 is located in front of the vertical plate 2 and directly below the fixed pulley 21, and the digital force gauge 4 is located in front of the vertical plate 2 and directly below the drive shaft of the motor 22;

[0030] One end of the first pull rope 5 is wrapped around the drive shaft of the motor 22, and the other end is tied to the upper end of the digital force gauge 4. The second pull rope 6 is wrapped between the movable pulley 3 and the fixed pulley 21. One end of the second pull rope 6 is tied to the lower end of the digital force gauge 4, and the other end is tied to the upper end of the movable pulley 3. Multiple weights 7 are hung at the lower end of the movable pulley 3.

[0031] The front of the vertical plate 2 is also provided with a first scale mark 24 and a second scale mark 25.

[0032] The first scale mark 24 and the second scale mark 25 are both set along the height direction of the vertical plate 2. The movable pulley 3 and the weight 7 are located directly in front of the first scale mark 24, and the first pull rope 5 and the digital force gauge 4 are located directly in front of the second scale mark 25.

[0033] A controller 23 is also provided in the middle of the back of the vertical plate 2. The controller 23 is connected to the power supply circuit of the motor 22.

[0034] A mounting hole is provided on the upper right side of the front of the vertical plate 2. The motor 22 is snapped into the mounting hole, and the drive shaft of the motor 22 faces the front of the vertical plate 2.

[0035] A support rod 11 is also vertically installed on the upper surface of the base 1. The support rod 11 is located behind the vertical plate 2, and the surface of the support rod 11 is attached to the back of the vertical plate 2.

[0036] The digital force gauge 4 has hooks at both the top and bottom.

[0037] Hooks are provided at both the upper and lower ends of the movable pulley 3.

[0038] In summary: A fixed pulley 21 is provided on the upper left side of the front of the vertical plate 2, and a motor 22 is provided on the right side. The movable pulley 3 is located directly below the fixed pulley 21, and the digital force gauge 4 is located directly below the drive shaft of the motor 22. The upper end of the first pull rope 5 is wrapped around the drive shaft of the motor 22, and the lower end of the first pull rope 5 is tied to the upper hook of the digital force gauge 4, thus fixing the digital force gauge 4.

[0039] The second pull rope 6 is wound between the fixed pulley 21 and the movable pulley 3. One end of the second pull rope 6 is fixed to the lower hook of the digital force gauge 4, and the other end of the second pull rope 6 is tied to the upper hook of the movable pulley 3. In this way, the second pull rope 6 provides support to the movable pulley 3.

[0040] In use, multiple weights 7 are suspended from the hook at the lower end of the movable pulley 3; the controller 23 and the motor 22 are powered on, so the controller 23 can control the motor 22 to rotate at a constant speed, so the first pull rope 5 is wound at a constant speed on the drive shaft of the motor 22, and the digital force gauge 4 can rise at a constant speed. When the digital force gauge 4 rises, it can pull the second pull rope 6, and the second pull rope 6 can drive the movable pulley 3 to move upward, so the multiple weights 7 move upward together with the movable pulley 3;

[0041] During the upward movement of weight 7, the tension received by the connection between the second pull rope 6 and the digital force gauge 4 can be read through the digital force gauge 4. The distance the weight 7 rises can be read through the first scale mark 24. The distance the first pull rope 5 rises can be read through the second scale mark 25. The weights of the multiple weights 7 are known in advance.

[0042] This device can accurately read the movement distance of the weight 7 and the movement distance of the free end of the rope through the first scale mark 24 and the second scale mark 25. The uniform rotation of the motor 22 is more scientific and precise than manual rope pulling, which can easily realize the lifting, lowering and stopping of the heavy object, while freeing up one hand. The digital force gauge 4 can read the pulling force more intuitively.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An experimental apparatus for physical mechanical efficiency, characterized in that: Includes a base (1), a vertical plate (2), a movable pulley (3), a digital force gauge (4), a first pull rope (5), a second pull rope (6), and a weight (7). The vertical plate (2) is vertically set at the center of the upper surface of the base (1). A fixed pulley (21) is set on the upper left side of the front of the vertical plate (2), and a motor (22) is set on the upper right side of the front of the vertical plate (2). The movable pulley (3) is located in front of the vertical plate (2) and directly below the fixed pulley (21), and the digital force gauge (4) is located in front of the vertical plate (2) and directly below the drive shaft of the motor (22); One end of the first pull rope (5) is wrapped around the drive shaft of the motor (22) and the other end is tied to the upper end of the digital force gauge (4). The second pull rope (6) is wrapped between the movable pulley (3) and the fixed pulley (21). One end of the second pull rope (6) is tied to the lower end of the digital force gauge (4) and the other end is tied to the upper end of the movable pulley (3). The multiple weights (7) are hung at the lower end of the movable pulley (3). The front of the vertical plate (2) is also provided with a first scale mark (24) and a second scale mark (25).

2. The experimental apparatus for physical mechanical efficiency according to claim 1, characterized in that: The first scale mark (24) and the second scale mark (25) are both set along the height direction of the vertical plate (2). The movable pulley (3) and the weight (7) are located directly in front of the first scale mark (24), and the first pull rope (5) and the digital force gauge (4) are located directly in front of the second scale mark (25).

3. The experimental apparatus for physical mechanical efficiency according to claim 1, characterized in that: A controller (23) is also provided in the middle of the back of the vertical plate (2), and the controller (23) is connected to the power supply circuit of the motor (22).

4. The experimental apparatus for physical mechanical efficiency according to claim 1, characterized in that: A mounting hole is provided on the upper right side of the front of the vertical plate (2), and the motor (22) is engaged in the mounting hole, with the drive shaft of the motor (22) facing the front of the vertical plate (2).

5. The experimental apparatus for physical mechanical efficiency according to claim 1, characterized in that: The upper surface of the base (1) is also vertically provided with a support rod (11), which is located behind the vertical plate (2) and the surface of the support rod (11) is attached to the back of the vertical plate (2).

6. The experimental apparatus for physical mechanical efficiency according to claim 1, characterized in that: The digital force gauge (4) is equipped with hooks at both the upper and lower ends.

7. The experimental apparatus for physical mechanical efficiency according to claim 1, characterized in that: The upper and lower sections of the movable pulley (3) are both equipped with hooks.

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